PROVINCIAL ELECTRICITY AUTHORITY POWER SYSTEM ANALYSIS AND PLANNING DIVISION 200 NGAM WONG WAN ROAD, CHATUCHAK, BANGKOK 10900, THAILAND
ประกวดราคาอิเล็กทรอนิกส์ (e-bidding) เลขที่ PEA-PAPD-ESS-001/2565 งานxxxxเหมา แผนงานนำร่องพัฒนาระบบไฟฟ้าด้วยระบบกักเก็บพลังงานเชื่อมต่อ
ในระบบจำหน่าย พื้นที่ อำเภอxxxxx จังหวัดเชียงใหม่
(A Pilot plan of the energy storage system for distribution system development In Phrao, Chiangmai Province)
เอกสารเพิ่มเติมแนบท้าย เล่ม 2/2
การไฟฟ้าส่วนภูมิภาค
กองวิเคราะห์และวางแผนระบบไฟฟ้า
200 ถนนงามวงศ์วาน จตุจักร กรุงเทพมหานคร 10900
PROVINCIAL ELECTRICITY AUTHORITY POWER SYSTEM ANALYSIS AND PLANNING DIVISION 000 XXXX XXXX XXX XXXX, XXXXXXXXX, XXXXXXX 00000, XXXXXXXX
E-mail: xxxx_xxxxxxxx0@xxx.xx.xx
TEL. 0-0000-0000
Technical Specification and Requirements of Battery Energy Storage System (BESS)
Table of Contents
1 GENERAL 5
1.1 The system shall confirm to the following specification. 5
1.2 Electrical grid connection 9
1.3 Operation 9
1.4 Communications 10
2 ENVIRONMENTAL REQUIREMENTS 10
3 POWER CONVERSION SYSTEM (PCS) 10
3.1 General 10
3.2 System Operation 12
3.3 Detailed Technical Specifications 15
3.4 Standards 18
3.5 PCS Electrical Protection 18
4 BATTERY 19
4.1 Battery Type: 19
4.2 Detailed Technical Specifications 19
4.3 Standard 19
4.4 Battery Module/Tray/Pack [Note: Module, Tray, and Pack are the same word] 19
4.5 Battery Rack 20
4.6 Battery Protection 21
4.7 Cycle Life 22
5 BATTERY MANAGEMENT SYSTEM (BMS) 22
5.1 General 22
5.2 Minimum Functions of Module BMS 22
5.3 Minimum Functions of Rack BMS 23
5.4 Minimum Functions of System BMS 23
6 FUNCTIONAL REQUIREMENTS 24
6.1 Voltage Regulation 24
6.2 Reactive Power Regulation 24
6.3 Frequency Regulation 24
6.4 Round-trip Efficiency 24
6.5 Self-Discharge 24
6.6 Basic Insulation Level 25
7 ALARMS AND RESETS 25
7.1 Alarms 25
7.2 Resets 25
8 Installation 25
9 SAFETY 26
9.1 General 26
9.2 Fire Mitigation 27
10 SYSTEM TESTING, DOCUMENTATION, TRAINING COURSE AND WARRANTY 27
10.1 Testing 27
10.2 Quality Assurance 27
10.3 Documentation 28
10.4 Approval Drawings 28
10.5 WARRANTY 29
11 INFORMATION SECURITY 29
12 FACTORY ACCEPTANCE TEST (FAT) 30
13 STEP UP TRANSFORMER 30
14 EXCEPTIONS TO SPECIFICATIONS 30
15 SPARE PART RECOMMENDATIONS 30
1 GENERAL
Technical Specification and Requirements of Battery Energy Storage System (BESS)
1.1 The system shall confirm to the following specification.
The overall configuration of Battery Energy Storage System (BESS) for power system connection has been shown in Figure 1, BESS shall consist of:
1) BESS unit of at least 3 MW/at least 3 MWh of 15%-90% (normal operation) SOC (Note % SOC means % SOC of installation capacity) shall be provided. At least 3 MW of BESS power shall be able to supply 3 MW of load for at least 1 hour as described in Figure 2. Constant power charge and discharge with rated 1.0C of BESS rate and 1 cycle/day. Please be noted that BESS shall be able to operate at 5%-100% SOC if needed as islanding mode or daily peak shaving mode operation or any.
2) Xxxxxxxxxxxx lithium-ion battery with life expectancy rating of 10 years (minimum installation energy capacity requirement is at least 4.0 MWh at begin of life (BOL)) under normal operating conditions (ambient temperature of 23°C inside battery racks). At end of year 10th, usable capacity of battery shall be at least 95% of 3 MWh (at least 2.85 MWh).
a) Life expectancy graph of battery shall be submitted. There is degradation curve to show SOH of battery (MWh, %SOH) with time (year) for both install capacity/usable capacity graph. At third year usable capacity of battery related to life expectancy graph shall be tested at site.
b) Battery and battery management system (BMS) shall be installed in not more than 2 (two) of 20ft container (2x20ft).
3) A power conversion system (PCS) suitable for outdoor installation without actual container or building on a user-furnished concrete pad or the user- furnished box pad. External A/C system shall not be used for PCS. PCS shall be installed in not more than 1 (one) of 20ft equivalent size container.
4) Battery container and PCS shall be installed with roof. (Design by xxxxxx)
5) BESS monitoring and control building 4x16.25m shall be installed as in Appendix A supplied for monitoring, operation, and control of BESS.
6) Ground grid for the whole system shall be installed as in Appendix B.
7) Total footprint to install the whole system is 28x24m as in Figure 1 and Appendix C.
8) All of containers shall be coated with C5M coating properly designed for the range of environmental conditions.
9) One (1) set of power quality (PQ) meter (4 voltage channel and 8 current channel) that comply with PEA list which able to send alarm event data and trending data via internet system together with communication system (internet package) for the whole warranty period shall be provided.
10) The following documents shall be provided.
a. All needed footprint and layout of the whole system.
b. All electrical single line diagram to PCC at PEA system, included 22 kV recloser.
c. BESS electrical single line diagram
d. Battery: battery container design with detail of cell/module/rack control and AC with firefighting system, degradation curve. Document or multimedia as in item 4.4, 4.5 and 4.6 to show performance and detail of battery module, battery rack and battery protection.
e. PCS: certificate as defined in Table 1, efficiency curve, response time report
11) Specification requirements of the PCS, battery unit and BMS are further discussed in the following section.
Figure 1 Overall power system for BESS to connect.
90% SOC
Energy Capacity
75%
3 MWh Power Capacity
3 MW
15% SOC
Figure 2 Requirement of energy storage capacity (energy and power capacity).
1.2 Electrical grid connection
The BESS shall be connected to the medium voltage 22 kV AC three phase distribution line at a frequency of 50 Hz. A 5 MVA step-up transformer shall be provided to allow connection between the BESS and the 22 kV distribution line. The winding type of transformer can be defined by bidder, two or three winding. The vector group of transformer shall be YNd group. The PCS shall be designed to operate under the following condition:
Phase 3
Rated voltage 22 kV
Voltage range Max 23.10 kV, Min 20.90 kV Voltage fluctuation/Flicker According to PEA regulations Rated frequency 50 Hz
Frequency range 50 ± 0.5 Hz
Harmonics According to PEA regulations
Voltage unbalance < 2%
1.3 Operation
In normal operation, BESS shall operate in current-source mode, providing such functionality as voltage regulation, power factor correction, peak shaving and load following. It shall have the ability to perform full four-quadrant control.
If the utility power source is interrupted, the BESS shall have low-voltage ride through (LVRT) capability according to PEA Grid connection code 2016 as shown in Figure 3
to support the transition from grid connected to islanded condition. The BESS shall then power the islanded or until utility service is resumed for the energy storage unit is depleted.
Figure 3 LVRT requirement according to PEA Grid connection code 2016.
1.4 Communications
The BESS shall be capable of communicating over a standard protocol, like IEC104, DNP 3.0 over IP or IEC61850 protocol or Modbus TCP, furnished and installed by the system manufacturer. This will allow PEA to monitor and control such parameters as battery voltage, current, temperature, SOC and SOH at the cell module and rack levels; as well as allow to control charging, discharging and other functions of BESS, as necessary. Battery Management System (BMS) shall connect and transfer data to BESS control building.
The PCS shall communicate with the BMS via a standard protocol defined by vendor, e.g. Modbus RTU or Modbus TCP, etc. In case of Modbus communication, all Modbus detail shall be provided. The BESS shall have a maintenance port (serial or WiFi or Bluetooth or Lan port) to allow monitoring and control of BESS at local level via a PC.
The system shall be designed for use in the following environment
Operating temperature 0°C – 45°C without derating Humidity 5 – 95% non-condensing
Environment Saline Environment
Maximum altitude 1,000 m without derating
Seismic Rating Uniform Building Code Zone 4.1
Audible Noise Audible Noise shall be complied with Thailand environmental standard.
Outdoor: the noise shall not more than 70dBA.
Supplier must provide sufficient information specific to their particular product to facilitate utility personnel training and communications with emergency response and environmental agencies. Material Safety Data Sheets (MSDS) shall be provided as applicable.
3 POWER CONVERSION SYSTEM (PCS)
3.1 General
Battery units are predominately DC in nature. To utilize the battery capability to the AC load, the energy from batteries must be converted to a standard AC level and regulated through a converter, generally known as the Power Conversion System (PCS). The PCS serves as the interface between the DC battery system and the AC system, providing bi-directional conversion from DC to AC (for discharging batteries) and AC to DC (for charging batteries). The PCS may consist of one or more parallel units. The PCS shall be bi-directional converter that can be operated in inverting mode for battery discharging and rectifying mode for battery charging.
PCS shall be fully integrated power conversion system with one manufacturer providing all power conversion components. The PCS shall be outdoor type with stainless steel enclosure and coating properly designed for the range of environmental conditions.
PCS shall have the capability to seamlessly transition from grid forming mode to grid following mode and vice-versa. In grid following mode (on grid) PCS shall have the capability to perform fast voltage and frequency support based on droops and dead band and shall also have the ability to provide virtual inertia.
In grid forming mode (off grid of islanding) the PCS shall have the capability to operate as Virtual Generator providing voltage and frequency reference to an islanded grid. The PCS shall have the ability of full four quadrant (P, Q) operation ensuring bi-directional power flows. The PCS shall consist of a converter area, user-accessible DC termination area, and user- accessible control area. The user-accessible LV AC termination area shall be provided before step-up transformer.
1. Converter area:
Converter shall be modular type. The failure of a converter module within the BESS shall not prevent the operation of the remaining converter modules. The converter area shall contain a converter and DC circuit breaker.
• LV AC circuit breaker– The AC circuit breaker shall isolate the power unit from the utility source if needed.
• Converter – Upon opening of the AC circuit breaker in response to interruption of the utility source, the three-phase converter shall power the islanded load until utility service is resumed or energy in the battery pack is depleted.
• DC circuit breaker– The DC circuit breaker shall provide isolation of the battery pack, permitting routine maintenance to be performed on PCS.
2. AC termination area 22kV
The user-accessible AC termination area shall include bus terminal pads for connection of utility source.
3. DC termination area
The user-accessible DC termination area shall include terminations for cables from the battery pack.
4. Controls area
The user-accessible controls area shall contain the master controls and associated circuitry to support operation. Within the control area shall be the following:
• Master control board – The master control board shall provide the main processing and control functions of the converter.
• Power supply – The power supply shall provide the necessary power for the system controls.
• Control section – Inverter or its controller shall have means to select control mode of the power unit.
PCS shall meet the following minimum requirements
• Operate in an environment of up to 100% humidity
• Fully parameterizable for grid support
3.2 System Operation
3.2.1 Start/stop characteristics
The PCS starts or stops by turn on/off switch or by management system “RUN” or “STOP”, respectively, or receiving control commands from a local push button.
3.2.2 Operation during normal condition
The following functions shall be required with the PCS for the grid-connected and islanded (off grid) operation.
1. The AC power transformed efficiently from the DC power of the battery arrays shall be bi-directionally transferred to or from the distribution line without causing harmonics higher than the PEA regulation.
2. The following operation modes shall be provided:
a. Virtual synchronous generator
b. Active and reactive power control
c. Voltage and frequency control
d. Voltage and frequency droop for parallel operation.
3. Black start capability
4. The PCS shall contain a remote synchronization feature, as well as the standard synchronization used when starting the PCS online. The remote synchronization feature allows the PCS to synchronize its voltage and frequency to PCC.
5. PCS shall be stable against the usual change in voltage and frequency of the grid.
Mode selection and control parameter setting shall be done by local HMI. In addition, the PCS shall have the following capability:
• The PCS shall have the ability to perform full four-quadrant control.
• The PCS shall be able to perform load following. Voltage shall be maintained at +/- 5% nominal under normal operating conditions and +/- 10% under emergency conditions.
• The PCS shall have low-voltage ride through capability to support the transition from grid connected to islanded condition.
• The PCS shall have the synchro-check function to allow parallel operation with the grid.
Operation Mode Definition
• Virtual synchronous generator: This mode of operation makes the PCS work as a voltage source converter. Under this mode, the BESS shall be able to provide its own voltage and frequency to an islanded grid, or to work in parallel with the utility grid in the grid-connected mode.
• Active and reactive power control: In this mode of operation, PCS controls the output active and reactive powers supplied to the grid following their reference values which may be set locally or remotely.
• Voltage and frequency control: In this mode of operation, PCS controls its own voltage and frequency, enabling it to create an islanded grid. Voltage and frequency control is possible when the PCS is in the voltage source operating mode.
• Voltage and frequency droop for parallel operation: The voltage droop allows reactive power sharing when the BESS is in an islanded mode or paralleled with other voltage sources. The frequency droop allows active power sharing when the BESS is in an islanded mode or paralleled with other voltage sources.
• Black Start: During Blackout of the grid, based on operator command through control system, the BESS shall carry out a black start and energize the load. In Black Start mode, the BESS system shall be able to form grid without presence of utility voltage or any external generation sources. It shall control voltage and frequency of system.
3.2.3 Operation during abnormal condition
The PCS shall operate as follows during abnormal operation:
• The PCS stops automatically when serious abnormal conditions are detected.
• When not-serious errors are detected, the PCS continues operation with error signals which shall be reported to BESS control building and also operator via internet.
3.2.4 Operation condition for Black Start
The following shall be taken care for proper black start:
• Energy back-up shall be sized to ensure proper black starting of BESS system.
• BESS shall be able to safely shutdown, in case BESS is not able to perform successful black start due to transformer inrush currents in the system. The PCS shall operate as follows during abnormal operation.
In the event of a black start, system shall be able to detect a black bus and bring up BESS system automatically if configured to do so. In this mode, PEA shall manage the loads based on the energy available in the battery.
3.3 Detailed Technical Specifications
Table 1 Summarizes PCS technical specifications.
Details | Technical requirement |
AC ratings | |
Total rated output power to load @ nominal voltage | − 3 MW (charge) to + 3 MW (discharge) Full four quadrant (P and Q) operation ensuring bi- direction power flows, e.g. +3 MW at the same time with +3 MVar. |
Total reactive power @ nominal voltage | ≥ ±3 MVar (Absorb not less than 3 MVar and supply not less than 3 MVar) |
Rated output power of each unit | ≥ 200 kW |
Real and reactive power control accuracy | ±1% |
Voltage range | ±10% of Nominal voltage |
Type of output | AC three-phase system |
Frequency | 50 Hz ±1% |
VAR production | Full VAR production at rated voltage |
Harmonics and Power Quality | according to PEA standards by using 1 (one) power quality meter in PEA vendor list that be able to send any events and trending data to operator via e-mail. |
DC input ratings | |
Voltage range | 1,000 to 1,500 Vdc |
Ripple voltage | Less than 4V RMS |
Ripple current | Less than 10% of full current peak to peak |
Details | Technical requirement |
Environmental ratings | |
Functions/Features | |
Power flow operation | Yes, support four-quadrant control |
Real power control | Yes, positive and negative |
Reactive power control | Yes, capacitive and inductive |
Combination of real and reactive power control | Yes, with real power taking priority |
Load following (renewable smoothing) | Yes, allowing renewable smoothing |
Low-voltage ride through | Yes, supporting transition from grid connected to islanded operation |
Synchro-check function | Yes, supporting parallel operation with the grid |
Operation modes | |
Black start (capability) | Yes, external command |
Fully parameterizable for grid support | Yes. |
Commanded power | Yes, external command |
Commanded VAR | Yes, external command |
Frequency regulation | Yes, external command |
Frequency response | Yes, automatic |
Islanding | Yes, manual by operator (when utility source is lost) |
Scheduled power | Yes, preconfigured time/date of work power profiles |
Voltage regulation | Yes, external command |
Response time of PCS after getting the command | < 20 ms, shall be shown during FAT/FRT. |
Communications | |
Wi-Fi Internet Router | Provided during warranty period. |
Physical systems | |
Protection class | The PCS shall be provided in IP66 that minimize the amount of space required. Enclosure external color shall be [RAL 9010] |
Cooling system | Shall not require any external A/C |
Details | Technical requirement |
Time source | |
Time source | Propose to PEA by Contractor |
Monitoring and control | |
Interface, status and control panel | Yes |
Battery voltage (AC/DC) | Yes |
Battery current (AC/DC) | Yes |
Active power (AC/DC) | Yes |
Reactive power | Yes |
Energy (AC/DC) | Yes |
Capacity (Ah) | Yes |
Power factor | Yes |
Fault | Yes |
Battery information | Yes |
Audible alarm | Yes or by external device. |
Battery temperature (average/extreme) | Yes |
State of Charge (SOC) | Yes |
Warning messages | Yes |
Efficiency | |
Efficiency of power conversion | ≥ 98.5% at full load (efficiency curve shall be provided.) |
Protection system | |
Under/over voltage (DC and AC) | Yes |
Under/over frequency | Yes |
Over current protection | Yes |
Ground fault protection | Yes |
Overheat protection | Yes |
Surge protection (DC and AC) | Yes |
Automatic AC & DC open circuit when fault detection | Yes |
Insulating monitoring | Yes |
Function Features | |
Switching frequency | >= 1 kHz |
Details | Technical requirement |
Fully parameterizable for grid support | Yes |
Insulation resistance | Over 3 M-Ohm at DC 1000 V (exclude the circuit less than DC 60V) |
Withstand voltage | AC 2000V 1 minute (exclude the circuit less than DC 60V) |
Withstand impulse voltage | ± 5000V 1.2 x 50𝜇S each 3 times |
Noise level | |
Certificate | IEEE 1547 or shall comply with PEA or MEA standard grid code and be in PEA or MEA approval list. |
3.4 Standards
PCS shall be supplied from a manufacturer with ISO 9001 certification or better. PCS manufacturer shall ensure that any sub-suppliers supplying equipment that will form part of the PCS have appropriate levels of quality assurance. The metallic materials for supporting the PCS system shall be resistant to corrosion.
3.5 PCS Electrical Protection
The PCS shall be protected against thermal overload, over- current and over- voltage. Insulating monitoring ground fault detection shall be provided. The following protective function shall be provided:
• DC over-voltage
• DC under-voltage
• DC over-current
• AC over-voltage
• AC under-voltage
• AC over-current
• Anti-Islanding
• Battery protection
• Internal fault (over temperature, logic failure, etc.)
The electrical shield cable shall be adopted for the signal and control cable. The surge absorber shall be connected on both sides. EMC requirement shall meet IEC/EN 61000 or equivalent standard.
4 BATTERY
4.1 Battery Type:
Indoor type battery shall be Lithium-Ion type suitable for utility scale BESS. Different chemistry of Lithium-Ion batteries shall be Lithium Manganese (LMO) or Lithium Nickel Manganese Cobalt Oxide (NMC) or Lithium Nickel Cobalt Aluminum Oxide (NCA) or Lithium Ion Phosphate (LFP).
4.2 Detailed Technical Specifications
Table 2 Summarizes technical specifications of the battery.
Details | Technical requirement |
Energy | Refer to Topic#1.1 To supply 3 MW load for at least 1 hour. |
Type | Li-ion |
Allowable charging capacity for BESS | 1.0C |
Allowable discharging capacity for BESS | 1.0C |
Round-trip AC energy efficiency (excluding auxiliaries of BESS in normal operation) at 22 kV side of BESS for 90% to 15% SOC, 3MW charge/discharge, operation at nominal DC voltage and 100% load condition of PCS | > 85% |
Cycle life (In some conditions, battery shall be able to operate at 5%-100% SOC) | > 5,500 at 15-90% SOC |
Certificate | UL9540A and UN3536 and UN38.3 |
4.3 Standard
Battery shall be supplied from a manufacturer with ISO 9001 certification or better.
Battery manufacturer shall ensure that any sub-suppliers supplying equipment that will form part of the battery have appropriate levels of quality assurance. The metallic materials for supporting the battery system shall be resistant to corrosion.
4.4 Battery Module/Tray/Pack [Note: Module, Tray, and Pack are the same word]
• Module BMS: Module-level controller individually controls the charging/discharging performance of each module automatically without system shutdown every day to avoid serial-connection mismatch.
• When one module is fully charged/discharged it will be bypassed with the module optimizer automatically, so that other not fully charged/discharged module can continue charging or discharging.
• Negative Temperature Coefficient (NTC) resistors in copper bar, NTC temperature sampling in module copper bar to avoid overheating.
• Battery module shall consist of many battery cells connected in series/parallel.
• Module BMS shall be provided with battery fuse and DC current measurement devices.
• When fault occurred in any module, plug-and-plays system design keeps the system free from on-site replacement with experts.
• Module air cooling system shall be provided.
• Rack BMS: Rack-level controller ensures all racks are simultaneously fully charged/discharged automatically without system shutdown every day to avoid parallel-connection mismatch shall be provided.
• Rack controller adjusts bus voltage of each rack and minimize circulating current of each rack to less than 1% where rack capacity can be fully utilized for more energy. It means that each rack shall be controlled individually by each control devices.
• Distributed A/C individually cool each rack to control temperature difference inside the system within 3 degrees Celsius shall be provided.
• Battery modules shall be connected in series/parallel in the battery rack suitable for PCS DC voltage range.
• Rack BMS shall be provided with battery fuse and DC voltage and current measurement devices.
• Electrical connection shall be at rack front side.
• Many racks shall be connected in parallel to total capacity required for this project.
The following protections shall be provided:
• Multi-level shutdown and protection can detect failure for quick response in the early stage. Module controller auto-bypasses faulty modules to avoid spreading, fault shutdown in each rack, and rapid shutdown button to protect the whole system.
• Power control cabinet and fire extinguishing system are separated from battery to guarantee rapid suppress to thermal runaway. Clean gas puts off fire within 10 seconds and avoids second time burning by using Novec1230 or FM200 fire extinguishing gas.
• Battery internal short circuit diagnosis system shall be provided to identify hidden short circuit tendencies.
• Sensors (combustible gas sensor, smoke detector, temperature sensor, flood sensor) monitoring system shall be provided to alarm efficacy issues in advance.
• Over-charge protection
• Over-discharge protection
• Over-temperature protection
• Over-current protection
• Internal battery fault detection
• BESS SOC balancing
Protective devices should include for DC-side protection:
• Battery fuse for each battery cell (preferred)
• Battery fuse for each battery module
• DC circuit breaker (CB) for each battery rack
4.7 Cycle Life
• If the product is sensitive to depth of discharge, the manufacturer must state the limitations and the product should be sized such that the depth of discharge corresponds to the required cycle life.
• For purposes of estimating and demonstrating cycle life, cycles are defined in the same manner as system efficiency.
• Results of charging and discharging for BESS are tested at 1.0C.
5 BATTERY MANAGEMENT SYSTEM (BMS)
5.1 General
BMS is used to monitor, protect, maintain safety and optimal operation of each battery cell, module and rack. BMS consist of: module BEMS, rack BMS and system BMS.
5.2 Minimum Functions of Module BMS
• Each battery module shall be controlled individually.
• Metering and monitoring
o Battery cell voltage (all cells)
o Battery module voltage
o Battery module temperature
o Battery module current
• BESS balancing
o Module BMS should balance voltage and SOC of modules
• Safety protection
o Module BMS should protect the battery cells and module from:
▪ Over and under voltage
▪ Over current
▪ Short circuit current
▪ Over and under temperature
• Data communication: all metering items and contactor status shall be provided for rack BMS control and monitoring system.
5.3 Minimum Functions of Rack BMS
• Each battery rack shall be controlled individually.
• Metering and monitoring
o Battery rack voltage
o Battery rack current
o Battery rack temperature
o Battery SOC of battery rack
• Rack balancing
o Balancing battery rack scheme
• Safety protection
o Rack BMS should protect the battery rack from:
▪ Over and under voltage
▪ Over current
▪ Short circuit current
▪ Over and under temperature
• Data communication: all metering items and contactor status shall be provided for system BMS control and monitoring system.
5.4 Minimum Functions of System BMS
• Metering and monitoring
o Battery system voltage
o Battery system current
o Battery rack voltage
o Battery rack current
o Battery rack temperature
o Battery SOC of each rack and battery system
o Battery SOH (state of health) of each rack
• Safety protection
o System BMS should protect the battery system from:
▪ Over and under voltage
▪ Over current
▪ Short circuit current
▪ Over and under temperature
• Data communication: all metering items and contactor status shall be provided for PCS control and monitoring system by a standard protocol, e.g., Modbus RTU or Modbus TCP protocol.
• BMS data communication: All metering items and contactor status shall be provided for PCS control and monitoring system by a standard protocol, e.g., Modbus RTU or Modbus TCP protocol.
6 FUNCTIONAL REQUIREMENTS
6.1 Voltage Regulation
Voltage deviation should be controlled within +/- 1% for a specified sec sampling
rate.
6.2 Reactive Power Regulation
The system shall maintain a defined VAR flow level within +/- 5%.
6.3 Frequency Regulation
Frequency deviation should be controlled within plus/minus ½ cycle per second.
6.4 Round-trip Efficiency
The roundtrip AC-AC energy efficiency, measured at the point of common coupling shall be provided and exclude parasitic and auxiliary losses under worst case conditions. The calculation is as follows:
𝜼 =
𝒌𝑾𝒉𝒐𝒖𝒕
𝒌𝑾𝒉𝒊𝒏
(𝒓𝒂𝒕𝒆𝒅𝒅𝒊𝒔𝒄𝒉𝒂𝒓𝒈𝒆𝒑𝒐𝒘𝒆𝒓) × (𝒅𝒊𝒔𝒄𝒉𝒂𝒓𝒈𝒆𝒕𝒊𝒎𝒆)
× 𝟏𝟎𝟎% = (𝒓𝒂𝒕𝒆𝒅𝒄𝒉𝒂𝒓𝒈𝒆𝒑𝒐𝒘𝒆𝒓) × (𝒄𝒉𝒂𝒓𝒈𝒆𝒕𝒊𝒎𝒆) + 𝒍𝒐𝒔𝒔𝒆𝒔 × 𝟏𝟎𝟎%
Wherein, the discharge time is from a fully charged to fully discharged system, and charge time is from a fully discharged to fully charged system. If the auxiliary power is provided by a separate connection from the energy storage system, these measured values should be reflected in the losses term in the equation.
6.5 Self-Discharge
Supplier shall provide self-discharge characteristics.
6.6 Basic Insulation Level
The BESS AC system equipment shall have a Basic Insulation Level in accordance with PEA or International standards.
7 ALARMS AND RESETS
7.1 Alarms
The BESS shall provide the following alarms.
• Informational Notification—indicates the status of the unit.
• Warning Alarm—indicates a problem with the converter requiring attention (not affecting proper operation).
• Converter Inhibit—indicates a problem with the converter affecting proper operation. The converter will stop operation.
• Trip Offline Alarm—indicates a severe problem with the converter. The system will not operate.
• Isolate Alarm—indicates a problem affecting proper operation of the system. The system will operate with limited functionality.
• Fire detection remote alarm status for main fire alarm control panel, and control and monitoring system. These alarms shall be reported to HMI of BESS system.
7.2 Resets
Energy storage unit alarms shall be reset by any of the following means.
• Manual Reset—via the reset button located on the control panel, or via a personal computer connected to the control panel Ethernet port.
• Auto Reset—automatically performed until reaching a predetermined reset count.
• Self Reset—automatically performed whenever require.
8 Installation
PCS need to be located outside along necessary outdoor rated enclosures to maintain environmental condition for proper operation of these equipment. Proper access and maintenance space shall be provided for each cabinet. Battery cabinet shall be equipment with complete and failsafe fire detection/extinguishing system. Each equipment should be properly earthed. Safety signages to be provided at container.
Battery system shall be equipment with the following:
o air conditioning system
o gas detection system Hydrogen and Methane.
o automatic fire detection, fire suppression system. The following items shall be complied.
• A nameplate shall be provided specifying the following:
o Manufacturer name
o Connection diagram
o Unit ratings: Power, Energy, Voltage, BIL
o Specimen data: serial number, date of manufacture
• Signage shall indicate Source and Load-Side AC Buses, Neutral Bus, DC Bus, Isolation Contactor, and Module names. Custom signage will be in accordance with specific utility requirements.
• All necessary safety signs and warnings.
• All necessary signs and warnings for identification of hazardous materials as described in NFPA704 or IEC62933-5-2 shall be included on the unit.
9 SAFETY
9.1 General
1. For all BESS equipment, the Supplier shall provide information on specific safety issues related to the equipment, including appropriate responses on how to handle the energy storage system in case of an emergency, such as fires or module ruptures.
2. The BESS shall be designed and manufactured with safety and environment as a priority.
3. Battery manufacturer shall have an excellent track record of safety and environmental performance.
4. PEA reserves the right to attend the manufacturer’s premises to inspect and carry out audits of the BESS during manufacture and the associated QA documentation. The manufacturer shall assist the client to carry out such inspections and audits and shall rectify and defects found in a timely manner.
9.2 Fire Mitigation
• Provisions shall be included extinguish internal fires.
10 SYSTEM TESTING, DOCUMENTATION, TRAINING COURSE AND WARRANTY
10.1 Testing
The following test procedures shall be conducted on the unit prior to shipment.
The Testing shall use IEC 62933 as a guidance.
• Battery connection and configuration check
• Circuit boards and subassembly functionality
• Mechanical inspection
• Wiring continuity
• Alarm functionality
The user shall witness the factory acceptance testing at the manufacturer’s production facility.
10.2 Quality Assurance
• Factory Testing—Prior to shipment, the bidder shall complete a documented test procedure to test all required functions of the BESS and guarantee compliance with the specifications. These are, but not limited to, the followings:
o The ability to perform full 4-quadrant control
o The ability to perform black start
o The ability to deliver zero-voltage ride through
o The ability to operate in an islanded operation
o The ability to perform parallel operation
• PEA shall witness the factory acceptance testing at the manufacturer’s production facility.
• Assemblies and Materials—All materials and parts shall be new, of current manufacture, and shall not have been used in a prior service, except as required during factory testing. The system manufacturer shall conduct inspections on incoming parts, assemblies, and final products.
10.3 Documentation
The bidder shall provide the following documentation for installing and operating
the BESS:
• Product Data—This documentation includes catalog sheets and technical data sheets indicating physical data and electrical performance, electrical characteristics, and connection requirements.
• Operation and Maintenance—This documentation includes a manual for preparing, operating, and maintaining the energy storage unit. This includes equipment wiring connection outlines and written instruction for troubleshooting.
• System Electrical Connection Drawings—This documentation includes drawings for properly connecting electrical wiring at the time of installation.
• Installation Instructions—This documentation includes step-by-step installation instructions for properly installing the unit.
• Recommended spare parts (with list) – If applicable, the instruction book will list the required spare parts to be furnished with the energy storage system. Each spare part shall be interchangeable with, and shall be made of the same material and workmanship as the corresponding part included with the product furnished under these Specifications.
• Special tools - The contractor shall furnish a complete set of any special tools, lifting devices, templates and jigs, which are specifically necessary for installation and/or maintenance of the energy storage system.
Additionally, special tools for PCS configuration and system parameter setting
including link cable and software licenses shall be provided.
10.4 Approval Drawings
Drawings shall be provided for each energy storage system, which clearly indicate the physical parameters, electrical characteristics, and auxiliary equipment. These drawings shall include, but are not limited to, the following:
10.4.1 Nameplate system drawing to be located on the doors of the container or cabinets.
10.4.2 Outline drawing including the following:
• Assembly of principal component, converter, control cabinet, parts and accessories.
• Power requirements for all control and auxiliary equipment.
• Shipping Center of Gravity – shown on two (2) views
• Installed Center of Gravity – shown on two (2) views
• Centerlines for external conduit and grounding cable connections.
• Projected floor space for container systems if applicable, including air conditioning units mounted on the side.
• Weight of the components and container.
• Kilowatt & Kilowatt-Hour rating.
10.4.3 Control Elementary Wiring Diagrams, with cross references for checking and verifying all of the control circuit and wiring diagrams, along with the terminal designations for termination of field wiring of all equipment.
10.5 WARRANTY
Manufacturer warranty shall be provided for the period of the contract from the date of commissioning. Please submit price reduction for five (5) years warranty. The warranty shall cover all defects of the BESS from manufacturing and non-compliance with the contract; and manufacturer shall repair or replace the defect product at their own cost. The certified warranty issued by battery manufacturers or vendors (Not Engineering Procurement and Construction: EPC) shall be transferred to PEA before the issuance of Final Acceptance Certificate.
11 INFORMATION SECURITY
Supplier shall design the BESS to be hardened against willful attack or human negligence as per NISTIR 7628 or IEC62443-4-1 or IEC/ISO 27001. Supplier shall contract information/cyber security scans and penetration tests by a 3rd party security company.
12 FACTORY ACCEPTANCE TEST (FAT)
FAT must be performed to ensure that the BESS meet performance requirements indicated above. Result of FAT relevant to performance requirements shall be provided to PEA. For more details are in Bidding document.
The contractor shall submit at least I/O lists and FAT procedure before FAT testing at manufacture’s site. FAT shall verify that the BESS equipment meets project requirements prior to the BESS equipment leaving the factory. Any defects identified shall be rectified prior to the BESS leaving the factory.
The FAT shall be carried out according to a predefined program agreed during engineering to confirm that the offered BESS equipment and Control system performs within the offered scope and fulfils the demands stated within this proposal. Those functions that cannot be built during the FAT for one reason or another are simulated and tested as close as possible in a manner corresponding to the final functioning.
IEC 62933-1-2-3-4-5 (Electrical Energy Storage (EES) System) shall be used as guild line for all testing.
13 STEP UP TRANSFORMER
STEP UP Transformer shall comply with IEC 60076 or PEA standard.
14 EXCEPTIONS TO SPECIFICATIONS
Supplier shall submit a redline/tracked changes document to any and all exceptions herein this specification and include an explanation for the same. Supplier shall also submit a written signed letter on company letterhead should they elect to not take any exceptions to this specification.
15 SPARE PART RECOMMENDATIONS
BESS major equipment: control, protection, metering, local control system, remote control system, protection relay and special tools with recommended spare parts (Breakdown in price schedule of each item).
Appendix A Monitoring and control building
แผนงานพัฒนาระบบไฟฟ้าด้วยระบบกักเกบ็ พลังงานเชื่อมต่อในระบบจาหน่าย นาร่ องพืxx xxx อาเภอxxx xx จังหวัดเชียงใหม่
A Pilot plan of the energy storage system for distribution system development in Phrao, Chiangmai Province
(ร่ าง TOR) ใช้เพื่อประกอบการจัดทา˚ ราคากลางเท่านั้น Page 32
แผนงานพัฒนาระบบไฟฟ้าด้วยระบบกักเกบ็ พลังงานเชื่อมต่อในระบบจาหน่าย นาร่ องพืxx xxx อาเภอxxx xx จังหวัดเชียงใหม่
A Pilot plan of the energy storage system for distribution system development in Phrao, Chiangmai Province
Appendix B Ground grid system
(ร่ าง TOR) ใช้เพื่อประกอบการจัดทา˚ ราคากลางเท่านั้น
Technical Specification and Requirements of Battery Energy Storage System (BESS) Page 63
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Appendix C Total footprint
(ร่ าง TOR) ใช้เพื่อประกอบการจัดทา˚ ราคากลางเท่านั้น
Technical Specification and Requirements of Battery Energy Storage System (BESS) Page 65
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