Optimization Method for Fault Ride-Through Parameters of Energy Storage to Reduce Short-Term Power Impacts Under Faults

In high-penetration renewable energy systems, voltage dips during short-circuit faults can trigger a large number of renewable energy sources to enter (Low Voltage Ride Through, LVRT) control, causing significant short-term power impacts in the system. The commissioning of new energy storage introduces additional regulation resources to the system. This paper proposes an optimization method for energy storage fault ride-through parameters to reduce short-term power impacts during faults. Based on PV output power and the charge/discharge state of energy storage, the voltage threshold for energy storage entering LVRT is optimized. Additionally, based on the voltage threshold for energy storage stations entering LVRT control and the equivalent impedance between each energy storage station and PV station, the control strategy for energy storage exiting LVRT control is optimized.