New Study Shows How Solar Can Enhance Grid Reliability
President Obama’s publication in Science is just the most recent reiteration of how far we have come with clean energy development in the last decade. The question now is not whether we should transition to cleaner sources of energy, but rather how do we do so in the most reliable and cost-effective way?
In California, where we are planning to satisfy at least 50% of our electricity needs with renewables by 2030, we are working on accelerating the solutions that will enable us to integrate large quantities of clean energy onto the grid. One of the most exciting strategies—using renewables to provide the grid reliability services traditionally provided by natural gas—just got a little closer to reality.
A new study released by the California Independent System Operator (CAISO) (aka the grid operator for most of the state) finds that large-scale solar plants, with the right type of inverter technology, can provide many of the essential grid reliability services the grid needs. The study concludes that “It may in this way mitigate the impact of its variability on the grid, and contribute to important system requirements more like traditional generators.”
In a nutshell, the CAISO is saying it has found a strategy for operating renewables in a way that supports further integration of renewables onto the system. Renewables can now be part of the integration solution.
The test was conducted in August on one of First Solar’s 300 MW PV plants. According to the CAISO, the data demonstrates the capability of PV plants to provide various grid services. From the report: “This data showed how the development of advanced power controls can leverage PV’s value from being simply an intermittent energy resource to providing services that range from spinning reserves, load following, voltage support, ramping, frequency response, variability smoothing and frequency regulation to power quality.”