Skip Ribbon Commands
Skip to main content
Sign In


  • U-W
    • Uneconomic adjustment policy
      Formerly Parameter Tuning. The primary purpose of the Parameter Tuning effort is to determine the values for the various Uneconomic Adjustment parameters – i.e., the penalty prices – to be used in the MRTU market software at the start-up of the MRTU markets and in the final phase of Market Simulation leading up to the market start-up. There are several ways to classify the various penalty prices to be studied in this effort: (a) scheduling run parameters and pricing run parameters; (b) Self Schedule parameters and constraint parameters; and (c) Day Ahead Market parameters and Real Time Market parameters. As a result of the Uneconomic Adjustment Policy effort the California ISO (the ISO) anticipates making a filing at FERC in July to amend certain related provisions of the MRTU Tariff.
    • Valley Electric Association
      The California ISO and Valley Electric Association have executed a memorandum of understanding that will form the basis of a transition agreement, once authorized by the ISO Board of Governors, detailing the process for the electric cooperative to become an ISO participating transmission owner, utility distribution company and load serving entity. Valley Electric and the ISO have identified several integration issues that must be addressed prior to January 2013 when Valley Electric is expected to formally participate in the ISO market. This initiative is not following the normal ISO stakeholder process because of the nature of the negotiations between the ISO and Valley Electric.
    • Variable operations and maintenance cost review 2012
      On Mar 29, 2012 the ISO revised its default operations and maintenance cost adders, which represent the per-megawatt hour variable, non-fuel costs of running a generating unit at or above its minimum operating level. The ISO increased the number of adder values from two to ten to differentiate costs by technology for all generation resources participating in the market.
    • Voluntary preferred resource auction
      This initiative will establish a voluntary annual auction for preferred resource capacity, which enables procurement of preferred resources to manage local areas affected by SONGS’ closure and to meet ISO reliability requirements. The phase one auction will match buyers to suppliers of demand response resources only for a multi-year term, while phase two will provide participation allowances for multiple resource types.
    • Wheeling data submission tariff amendment
      The California ISO has initiated this stakeholder process to consider amending Section of its tariff. This section currently requires scheduling coordinators to submit wheeling data for transactions between the ISO controlled grid and a non-participating transmission owner's transmission system "within five days from the end of the calendar month to which the relevant Trading Day relates". The ISO proposes to amend the tariff section to require submission of wheeling transaction data within 43 calendar days from the trading day on which the wheeling transaction occurs.