Microgrid reactive power accurate distribution method based on droop control

• Main Authors: DONG LONGJING, YANG ZHENGXIAN, WU NA, ZHOU CHENGXIANG, FAN SHUXIAN, LIU ZIHUI
• Format: Patent
• Language: Chinese; English
• Published: 17.07.2020
• 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 microgrid reactive power accurate distribution method based on droop control, and belongs to the field of power system operation and control. A distributed power supply in amicrogrid is mainly connected to a grid through an inverter interface, one of a plurality of inverters connected to the same bus in parallel is selected as a main control inverter, and local droop control parameters and line impedance from the inverter to a grid-connected point are transmitted to the other inverters through a communication network; after the other inverters obtain the parameters of the main control inverter, the local droop coefficient is adjusted according to droop control and a line characteristic constraint equation; and finally, the purpose of reactive power accurate distribution is achieved. Different from a traditional successive approximation adjustment method, the method directly obtains output reactive power according to droop control and the line characteristic constraint equation, and h