8 California Food Producer EDITION 2, 2018 Already, the ISO’s renewable resources can serve up to half or more of the electricity demand at certain times of the day. The ISO views this shift to a green, efficient, modern energy grid as one of the biggest drivers of the economy and key to a cleaner environment. The dramatic increases of renewable energy coming onto the system are emblematic of the successes of California policies and objectives. The transition to a low-carbon grid also presents challenges and opportunities. For example, at certain times, especially during the middle of the day, solar plants can produce more electricity than can be consumed by customer demand. The ISO’s market mitigates some of the oversupply, but much of it must be curtailed. Curtailment works well for grid operators to keep supply and demand in balance, but it is not an ideal way to optimize the state’s investment in clean energy. As the state introduces increasing amounts of renewable energy into the grid, oversupply and curtail- ments are expected to occur more often. For that reason, the ISO is exploring and supporting solutions to avoid curtailments and maximize clean energy sources, including: ■ ■ Regional coordination – The ISO supports an expansion of its operations to a multi-state market, which would increase opportunities for resource-sharing, energy scheduling, and long-term transmission planning. A western regional grid is seen as the most cost-effective and seamless way to meet the state’s ambitious clean energy goals, while saving costs, lowering emissions and promoting economic growth. MARY MCDONALD Director of State Affairs, California Independent System Operator California