Market Operations, Market Rules and Market Design, Market Simulation, Settlements and Market Clearing

June 25, 2009

Requested Client Action

Information Only

Categories

Market Operations

Market Rules and Market Design

Market Simulation

Settlements and Market Clearing

Pre-Summer Release: OASIS

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Summary

The OASIS features included in the pre-summer release scope will be ready for market simulation on Monday, July 6, 2009.

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Main Text

This market notice provides an update on the schedule for Open Access Same-time Information System (OASIS) features included in the pre-summer release.

Scope

Description

Status

Transmission Outage Report

The Transmission Outage Report is reposting records that are unnecessary for the report purpose, causing problems for participants going through all the records rather than the few records that are actually affected. The California ISO (ISO) will correct this variance.

Ready for market simulation on July 6.

Branch Group Shadow Prices

The Branch Group Shadow Prices report contains branch group data. Branch Group shadow prices should be on the Intertie constraint shadow prices found in the Nomogram Shadow Prices report. The ISO will correct filtering on both reports: Branch Group Shadow Prices Report and Nomogram Shadow Prices Report.

Ready for market simulation on July 6.

Scope	Description	Status
OASIS ATC	OASIS Available Transmission Capacity (ATC) is not correct for Transmission Usage reports. ATC is not calculated correctly by OASIS. The ISO will resolve this variance.	The OASIS ATC report in production is correct for trade date June 22 and going forward. As the Scheduled Net Energy from Imports/Exports data from 4/1 to 6/20 was not correct for the ITCs in the Transmission Usage reports, it has been removed and replaced by zero values.
Hour Ahead Scheduling Process (HASP) Price Correction Report and Real-Time Periodic Dispatch (RTPD) Price Correction/ Binding Clearing Report	Reports do not post to OASIS as needed. The ISO will provide these reports in OASIS as per the original OASIS specification.	These reports are now available in production OASIS for trade dates June 20 and going forward. The ISO will post these reports to OASIS for trades prior to June 20 back to April 1 and is targeting completion of this activity prior to July 6.

The Automated Dispatch System and Market Participant Portal enhancements were completed on June 17.

For additional information about the Pre-Summer Release, please see the Pre-Summer Release Notes posted at: http://www.caiso.com/23ad/23ade52771f0.pdf.

The OASIS enhancements status will be discussed in the next System Interface User Group (SIUG) conference call on June 30. Please refer to the ISO calendar for information on the SIUG conference calls at: http://caiso.com/meetings/index.cgi.

Important!

For those Market Participants who wish to receive market simulation updates, please use the Market Notice Subscription Form located at http://www.caiso.com/1c67/1c678de462d10.html to subscribe to the Notice Category: Market Simulation. Please note that submitting the subscription form will replace previously submitted subscription elections so make sure you select all categories of interest to you.

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For More Information Contact

Your Customer Services Representative

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