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Norwalk Home to World’s First Hybrid Battery-Gas Turbine System

Pictured (l-r): Margarita Rios, Norwalk councilmember; Mary Nichols, California Air Resources Board chair; Tom Doughty, CAISO vice president; Norwalk Mayor Luigi Vernola; SCE President Ron Nichols; Stéphane Cai, GE vice president for Commercial Solutions, Grid Solutions, Energy Connections; and Yahaira Ortiz, senior district representative for Sen. Tony Mendoza.


Staff Report

Hybrid technology is being used for the first time at two existing Southern California Edison “peaker” plants including Norwalk.

“We are watching the future unfold right before our eyes, ” said Norwalk Mayor Luigi Vernola. “This is something fantastic to look forward to. This is the future for California, Norwalk, and the world.”

“It is like a hybrid car,” said Vernola, “a lithium-ion battery provides energy to the grid immediately, allowing time for the gas turbine to ramp up and take over, if needed. The battery is later recharged.”

The system is called the Hybrid Enhanced Gas Turbine system, or Hybrid EGT, and results from a partnership between SCE, General Electric and Wellhead Power Solutions.

“This is the world’s first for a plant of this type. We are marrying battery storage with peaking generation, ” said SCE President Ron Nichols during a ribbon-cutting ceremony Monday at the Center Peaker Plant in Norwalk. “This plant provides high environmental benefits and enables a greater integration of renewables.

Think of this as a big version of a plug-in hybrid, ” he added. “If we don’t have to drive very far, we don’t have to use gas. If we need to go further, the gas engine is there to meet our needs. It provides ready power to meet expected and sometimes unexpected energy needs.”

The hybrid system, which went online March 30, combines three major enhancements to SCE’s existing Norwalk peaker plant: a battery energy storage system, an upgraded emissions control system and a groundbreaking operating system. The 10-megawatt battery storage system, combined with the gas turbine, allows the peaker plant to more quickly respond to changing energy needs, thus increasing the reliability of the electrical grid.

The hybrid system reduces by half the number of times the peaker plant needs to be restarted, thus reducing greenhouse gas emissions by as much as 60 percent and helping to improve air quality. Reducing the number of restarts helps reduce operating costs and extends the life of the equipment, saving money for SCE customers. Each plant will save about 2 million gallons of water.

“The community is better off, and the customers are better off, ” said Mary Nichols, California Air Resources Board chair, extolling the environmental benefits of the hybrid gas turbine system. “I can’t think of anything that’s not to like about this. ”


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