Power distribution network important load smooth switching control method based on energy storage quick response

• Main Authors: XU XIAODONG, GUO MING, QIU WEIJIE, XIAO XIAOBING, ZHANG RUIFENG, LIN SHUNSHENG, YANG QIANG, TAN BIN, MA XIN, XING ZHAOSEN, DING YUJIE, LONG XIAOBIN, SHI QIHONG, SHI HUJUN, OUYANG GUANGZE
• Format: Patent
• Language: Chinese; English
• Published: 04.01.2022
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; SYSTEMS FOR STORING ELECTRIC ENERGY

The invention discloses a power distribution network important load smooth switching control method based on energy storage quick response, which comprises the following steps of: adopting a Buck/Boost charging and discharging control circuit for energy storage of a storage battery, and adopting a constant-voltage charging and discharging control mode for the circuit; adopting a PQ control mode for an energy storage inverter during grid connection, adopting a V/f control mode during island, when a grid-connected operation mode is converted into an island operation mode, switching the PQ control into the V/f control, so that it is ensured that the voltage at a common connection point is not suddenly changed before and after switching, and an off-grid mode can be smoothly switched; and when grid connection is carried out again in the island mode, connecting the micro-grid in the same period, wherein the voltage vector frequency, the voltage vector amplitude and the voltage vector phase all meet grid connection