A Black Start Model with Power Unit Driving Multiple Auxiliary Machines in Wind Power Consumption

Abstract

The black start process is an abnormal special operation mode of power grid operation and the working conditions are complex, and there are often unexpected accidents and problems in the start-up process, especially the impact of different auxiliary machines driven at the load recovery stage on the system is very different, and the ordinary black start simulation results are not accurate enough. To this end, a black start model considering a single power supply to drive a variety of auxiliary machines is proposed. The auxiliary start-up stage of the nearby power plant after the successful black start is modeled, and the black start scheme is analyzed and evaluated from the three main aspects of generator self-excitation, no-load line over-voltage and low-frequency oscillation, and the transient response characteristics in the black start process are clearly displayed in the form of waveform diagram, which is used as a strong basis for judging whether the corresponding black start scheme of the model is safe and reliable.