Research on control system of new energy storage combined thermal power unit based on improved voltage droop control

The new energy station and its configured energy storage of a certain scale can be used as a stable power supply point to participate in the whole process of black start of the thermal motor unit on the opposite side of the power grid. In this paper, active frequency and reactive voltage droop control strategies are adopted in the whole process of new energy storage black start. In order to keep the voltage stable in the initial stage of black start, that is, in the process of energy storage zero start boost air charging line, a voltage control scheme of variable slope energy storage inverter is proposed in this paper. The variable slope transfer function module is introduced into the traditional reactive power voltage droop control to suppress the impulse current in the process of black start voltage building. The above strategy is verified by Matlab / Simulink simulation. The scheme proposed in this paper can meet the requirements of the whole process of new energy storage black start and ensure the stability of the control system of energy storage inverter device.