Fault ride-through control method and device of new energy island flexible direct transmission system

• Main Authors: TIAN XINSHOU, WEI CHUNXIA, TANG BINGJIE, ZHANG XINGYOU, SU JIANJUN, LEI YU, FAN XIAOJIE, LIU HONGZHI, LIU CHAO, XIAO YU, SUN SHUMIN, SU YUANYUAN, WANG ZHIBING, HU JIANZU, LI YAN, ZHENG GUANGFAN, YU PENG, QU LINAN, XU PENGCHAO, CHI YONGNING, ZHANG YONG, CHENG YAN, ZHANG XIAOYU, LI GUANGLEI, CHEN NING, TANG HAIYAN
• Format: Patent
• Language: Chinese; English
• Published: 15.11.2019
• 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 provides a method and a device for realizing new energy fault ride-through control under the coordination control of an energy storage device and a flexible DC converter station. For theflexible grid with the island access to new energy, when the DC power grid fails, the transmission power is limited, signals on an AC bus (voltage change, frequency change, etc.) are controlled by the predetermined DC converter station, the energy storage device is subjected to fast active power control to reduce the impact of island access to the new energy power station to ensure that the DC converter station is not overloaded, then, according to the given power transmission capacity of the DC power grid after the fault is restored, a power control system of a new energy power station and the energy storage device are started to perform power control to achieve a balance with the capacity of the converter station, and fault ride-through is achieved. The method is advantaged in that theimpact of island access to