Common use of Study Cases Clause in Contracts

Study Cases. The analysis summarized in this report used the power flow cases described below. When setting up the cases, tap settings of phase angle regulators and autotransformers were adjusted, within their capabilities, to regulate power flow and voltage. Similarly, switched shunt capacitors and reactors were switched were allowed to regulate voltage. Additionally, the Leeds SVC, Xxxxxxx SVC and Xxxxx FACTS device were held near zero output. The effectiveness of the SPS has been evaluated for summer peak load for two base system conditions described below. Case 1 - Benchmark Case without the SPS. In this case, Athens was dispatched with two GT/CT sets on at a total power output of 700 MW. Case 2 - Case 1 with the SPS modeled. In this case, Athens was increased to its full capacity i.e., 1080 MW in three combine cycle trains to increase flow on the Athens-Pleasant Valley and Leeds-Pleasant Valley (Lines 91 and 92) path. Additionally, a 240 MVAr capacitor bank was added to maintain the voltages at the Pleasant Valley, Millwood, Sprain Brook and Xxxxxxxxx stations above below 348 kV (a recently updated pre-contingency low voltage limit for these stations). It is noted that Xxxxxxxxx has the lowest voltage in the base case with the SPS. The capacitor bank could be installed at Xxxxxxxxx or Sprain Brook but there are concerns that space may be limited in those two stations. Therefore, Millwood was chosen to be the installation location and the capacitor bank size was installed to maintain the steady-state pre-contingency voltage at the four stations above 348 kV while keeping the Athens generator scheduled voltage 1.04 pu as modeled in the Benchmark case without the SPS.