Coordinated Control for Multi-level Reactive Power and Voltage

In order to solve the problem that the distribution network is in a state of non-economic operation in a certain area and period, the output voltage at the end of the distribution feeder is too high, the voltage fluctuation in the regional power grid increases, and the problem of unreasonable power flow caused by the distributed power supply connecting to the distribution network to participate in the adjustment, a reactive power and voltage coordination control strategy for distribution network is proposed in this paper . The static var compensator is used as the main reactive power compensation equipment, its location and capacity are planned, and it is supplemented by energy storage and voltage source converters in double-ended DC lines to carry out multi-layer and multi-source coordinated control of system reactive power voltage. It is verified that the reactive power compensation equipment can reduce the voltage deviation, improve the power quality and the power flow distribution, thereby reducing the system network loss.