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Managing the evolving grid 
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​Key topics

To help our readers stay on top of energy developments, here’s a dynamic, up-to-the-minute guide to what’s trending at the ISO.


ISO Department of Market Monitoring publishes fourth quarter report

The California ISO Department of Market Monitoring has posted its 2017 Fourth Quarter Report on Market Issues and Performance. The report provides an analysis of wholesale prices during the quarter as well as an overview of general market performance.

See the report

California ISO western EIM produces solid Q4 2017 benefits

The western Energy Imbalance Market produced nearly $34 million in benefits and avoided about 7,700 metrics tons of CO2 emissions.

Click here to read the news release.

Click here to visit the Western EIM website.

California ISO launches new webpage to track carbon emissions

The California Independent System Operator (ISO) today launched a new webpage that tracks historical and real-time greenhouse gas emissions from resources used to generate electricity that serves ISO load.

Learn about emission tracking

California ISO announces plans to become Reliability Coordinator

The California ISO announced it will become its own Reliability Coordinator (RC) and offer these services to other balancing authorities and transmission operators in the western United States. The RC services the ISO is contemplating will include outage coordination and day-ahead planning, in addition to real-time monitoring for reliability.

A reliability coordinator is responsible for complying with North American Electric Reliability Corporation (NERC) and regional standards, including providing oversight, monitoring operational and security risks, acting or directing action to preserve system reliability, and providing leadership in system restoration following a major reliability event.

Learn more

New to the web in 2017

The ISO has added or refreshed a number of pages or websites to help the public and stakeholders understand and track important topics. Here are just some of the webpages added in 2017:


California ISO receives national award for innovative solar plant test

The ISO received a national regulatory award for its groundbreaking work in demonstrating that solar energy plants can offer power grid resiliency, opening new horizons for integrating large amounts of renewable resources into electric systems.

Read the news release here.

Western EIM celebrates third anniversary

Western EIM celebrates three year anniversary delivering low cost energy across eight states. Since its launch on November 1, 2014, the western Energy Imbalance Market has saved consumers nearly $255 million while reducing carbon emissions by nearly 215,000 metric tons.

Click here to read the news release.

Click here to visit the Western EIM website.

Managing energy oversupply on the green grid

Increasing amounts of renewable energy coming online creates new challenges for grid operations and the bulk electric market. Because of high levels of solar production in the middle of the day, the grid often has an oversupply of energy, and sometimes has to curtail, or scale back, renewable energy generation. As the ISO advances toward the state’s 50-percent renewable goal, find out more about oversupply, what the ISO does to mitigate it, and some of the promising options on the horizon for solving it.

Learn more about oversupply here