Control method for realizing steady-state frequency no-deviating regulation of inverter by utilizing power coordinate transform

The invention discloses a control method for realizing steady-state frequency no-deviating regulation of an inverter by utilizing power coordinate transform. The control method is characterized by comprising: selecting virtual impedance according to a load average power factor; selecting a virtual impedance angle which is equal to a load average power factor angle; carrying out coordinate transform on active load and reactive load of the inverter according to the virtual impedance angle so as to obtain generalized active load Pd and generalized inactive load Qd; carrying out droop control on the generalized active load, selecting a droop coefficient according to an inverse ratio of inverter capacity, and selecting virtual impedance according to the inverse ratio of inverter capacity. The method has the beneficial effects that the active load and the reactive load can be shared according to a capacity ratio without relying on the communication between inverters, thereby ensuring that frequency deviation in a dynamic process is extremely small, and almost eliminating steady state frequency deviation.