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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.


Western Energy Imbalance Market reaches $213M

The western Energy Imbalance Market (EIM) cost benefits in the second quarter of 2017 are $39.52 million, with total benefits of $213.24 million since the real-time market launched in November 2014.
The western EIM used 67,055 megawatt-hours of surplus California renewable energy that may have otherwise been curtailed.

Access the western EIM quarterly benefits reports here

Preparing for the solar eclipse

The California ISO has been planning for more than a year to manage challenges on the electric grid during the “Great American Eclipse” on Aug. 21, 2017, when solar production is expected to drop, and the ISO will need to fill a need of 6,000 megawatts.


Find out more about the solar eclipse here

More than smart report on coordinating transmission and distribution grid operations

California is rapidly decarbonizing its electricity grid through increased reliance on decentralized production, storage and management of electricity use. This report describes the challenges of operating a high distributed energy resource grid, and recommends a number of new, proactive exchanges of information between ISO, 
utilities, and DER service providers.  

Access the report here

Joint agency energy reliability workshop in Southern California | Aliso Canyon

California’s energy agencies, the California ISO and Los Angeles Department of Water and Power have completed their assessment concerning the impact the operational limitation of the Aliso Canyon natural gas storage facility will have on grid reliability during the summer of 2017.

Access the reports here

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

2017 Summer assessment finds power supplies adequate

The California Independent System Operator (ISO) works with state agencies, generation and transmission owners, load serving entities, and other balancing authorities to formulate the summer forecast and identify any issues regarding upcoming operating conditions. The Assessment considers the supply and demand conditions using a random production simulation modeling approach for the entire ISO balancing authority area, and then further considers separately the conditions in the Northern and Southern California zones.

Read the assessment here

Department of Market Monitoring reports total wholesale costs decrease 9%

The California Independent System Operator’s (ISO) Department of Market Monitoring (DMM) reports that wholesale energy markets remained competitive in 2016 with wholesale prices decreasing by about 9 percent. Market prices were low because of lower natural gas prices, improved hydro-electric conditions, moderate loads and about 1,900 megawatts of new peak summer generating capacity from solar resources.

Access the report here

Wind and solar curtailment report now available

The California ISO provides a detailed accounting of wind and solar renewable generation curtailed in the ISO market. Read these reports in the context of the daily renewables watch reports for a more complete understanding of both renewable curtailment and generation.

Access the reports here

Regional collaboration

Learn more about the Western Energy Imbalance Market and the potential benefits of a fully integrated regional grid.

Read about it here

Greenhouse gas emissions tracking

The ISO developed a new report to track greenhouse gas emissions from resources in the ISO balancing area, imports serving ISO load - including dynamic imports - and transfers from western Energy Imbalance Market entities serving ISO load. 

Access the report and supporting documents here