Method and apparatus for determining reactive compensation power for voltage regulation of photovoltaic power station

The invention discloses a method for determining reactive compensation power for voltage regulation of a photovoltaic power station, which comprises the following steps: (1) abstracting an intermediate device into a system impedance in advance and obtaining a value of the system impedance, wherein the photovoltaic power station is connected to a power network through the intermediate device; (2) obtaining the output voltage target value of the photovoltaic power station; (3) acquiring the received voltage value of the power network at the current time and the reactive power of the photovoltaicpower station at the current time; (4) obtaining the reactive power output target value of the photovoltaic power station according to the difference between the received voltage value and the outputvoltage target value of the power network and the system impedance; (5) calculating the reactive power value to be compensated according to the difference between the reactive power target value andthe reactive power of the p