Frequency emergency control method in isolated island operation mode

• 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: 02.07.2021
• 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 frequency emergency control method in an isolated island operation mode. The method comprises the following steps: (1) acquiring upper and lower adjusting capacities of an adjustable capacity after calculation of a control target; (2) calculating a dynamic adjustment droop control coefficient by obtaining up-down adjustment capacity; and (3) calculating the required adjusting quantity according to the frequency deviation and the droop control coefficient. The droop control mode is adopted for the energy storage battery, the air conditioner and the electric automobile, the SOC state of the energy storage battery and the operation characteristics of the air conditioner and the electric automobile are considered at the same time, on the premise that production and life of residents are not affected, the energy storage battery, the air conditioner and the electric automobile are changed into adjustable resources through a control means to participate in the micro-grid frequency modulatio