Impact of the Breaches. 4.1 The parties agreed that the market impact as assessed by the investigator should be recorded as significant. The market impact of this breach could not be mitigated as it relates to inputs in final prices that have been published already.
Impact of the Breaches. 4.1 There could be a minor market impact. The results of the statistical sampling showed the vast majority of these meters are within the prescribed variance. However, the results also showed a bias towards running slowly during times of low load, with only a few meters marginally outside the level of tolerance for meters running fast. When tested at high load the sample results appeared more accurate.
4.2 There is also an impact on each consumer who pays monthly lease fees for an uncertified metering installation.
Impact of the Breaches. 4.1 The impact of the grid owner’s breaches is that if the single d.c. supply to the trip relay failed, the HLY5 220 kV circuit breakers would not open for operation of either HLY5’s main 1 or main 2 cable connection differential protections as they should. This would mean the backup protection systems on the Huntly 220 kV connected transformers and the adjacent substation 220 kV circuits to Huntly would operate to isolate the complete Huntly 220 kV bus and disconnect further equipment.
Impact of the Breaches. 4.1 The parties agreed that the market impact as assessed by the investigator should be recorded as minimal.
4.2 Vector notes that given the loss of supply occurred early in the morning, the impact was likely to have been minimal.
Impact of the Breaches. 4.1 The incident caused a loss of supply of 44 MW from Southbrook and Kaiapoi substations.
Impact of the Breaches. 4.1 The parties agreed that the market impact as assessed by the Investigator should be recorded as minor and addressed by the private settlement between Alpine and the non-participant.
Impact of the Breaches. 4.1 The breaches meant that market security was repeatedly not fully observed within the period of default.
4.2 The breaches by Auckland Commercial Solar caused events of default requiring the clearing manager to institute the default procedure in subpart 7 of Part 14 of the Code.
Impact of the Breaches. 4.1 Alpine has discovered inaccuracies of metering installations during statistical sampling. However, the parties consider the impact is minor.
4.2 There is also an impact on consumers who pay a monthly lease fee for uncertified metering installations. However, there is an off-set of these lease fees for such consumers because of Alpine’s ownership structure. Alpine passes benefits, such as annual discounts, on to consumers on its network.
Impact of the Breaches. 5.1 The parties agreed that the market impact as assessed by the Investigator should be recorded as minor.
Impact of the Breaches. 4.1 The parties agreed that the actual market impact as assessed by the Investigator should be recorded as negligible.
4.2 The impact of not revising bids is that the System Operator used inaccurate demand information in its schedules. The amount in this instance would have caused negligible market impact.
4.3 The market impact of not revising IR offers was that WPI was dispatched and paid $616 for instantaneous reserves that it would not have been able to provide had an under frequency event occurred.
4.4 The security impact was potentially serious on the power system had an under frequency event occurred. In the worst case scenario the System Operator may have been forced to rely on automatic under-frequency load shedding to arrest the fall in frequency.
