Voltage stability margin calculation method considering photovoltaic power station control mode

The invention discloses a voltage stability margin calculation method considering a photovoltaic power station control mode, and the method comprises the steps: adding the modeling consideration of a reactive power-voltage control mode of a photovoltaic power station in the calculation of the voltage stability margin, and obtaining a parameterized power flow equation through the expansion of a node voltage with the fastest voltage drop in a continuous power flow calculation process, meanwhile, in a prediction link in a continuous power flow calculation process, a hybrid prediction method is adopted, and under the condition that the voltage margin is relatively large, nonlinear prediction is adopted to accelerate the calculation speed; when the voltage is close to the voltage stability limit, linear prediction is adopted; according to the voltage stability margin calculation method, the influence of a large-scale photovoltaic power station control mode on the voltage stability is fully considered, and the calc