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Attachment A to CAISO White Paper “Competitive Path Assessment for MRTU- Preliminary Results for Spring and Summer Seasons”. Appendix A: Identifying Candidate Competitive Paths



Transmission path constraints in the network model used under MRTU are categorized in two groups, namely Competitive and Non-competitive paths. The distinction is central to local market power mitigation (Pre-IFM Passes 1 and 2). Although, in the theory, the list of candidate competitive paths could include all paths, the approach taken reduced the set of paths to be tested to those with some frequency of proactive mitigation activity taken in real time by CAISO Operators. Since there is no existing MRTU data with which to determine what paths are most frequently congested under a nodal market system, we rely on historically frequently congested paths/transmission lines across the ISO Control Area as evidenced by real time mitigation activities per the following criteria: (a) Frequently congested paths identified by high RMR dispatches incurred in realtime as RMR units are the first to be dispatched to relieve intra-zonal congestions; and (b) Frequently congested paths identified by high re-dispatch costs (OOS) incurred in real-time if the RMR dispatches are not sufficient to alleviate the constraints. In the following sections, each category of frequently congested paths is identified and

Year: 2011
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