Energy storage converter grid-connected and off-grid switching method, system, equipment and medium

• Main Authors: LIU WENPING, ZHOU HENG, LUO HAIXIN, ZENG WEI, DING YAO, LIAN ZHIBIN, LIN XIONGFENG, GUO FA'AN, WANG ZHENGANG, CAI GENMAN, LI XINHAI, ZENG LINGCHENG, CHEN WEIMING, YUAN TUOLAI, YAO GUANGJIU
• Format: Patent
• Language: Chinese; English
• Published: 20.12.2022
• 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 grid-connected and off-grid switching method, system, equipment and medium for an energy storage converter, which are applied to an anti-islanding protection device, and comprises the following steps: when a blocking signal sent by the energy storage converter is received, judging whether the blocking signal is an effective blocking signal according to whether the blocking signal meets a preset anti-shake time condition, and when the blocking signal is judged to be the effective blocking signal, judging whether the blocking signal is an off-grid blocking signal; whether the protection function of the anti-islanding protection device is locked or not is judged according to the comparison result of the receiving times of the effective locking signals in the preset time period and the preset times threshold value, and if the protection function is locked, the starting time of re-starting the protection function is determined according to the sum value of the locking time of the protecti