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Research on real-time simulation time error correction method based on virtual power

The real-time simulation of power system can realize the real-time data interaction with the external physical equipment. However, with the increasing scale of distribution network, the realtime simulation of complex distribution network may need to be implemented by multiple computers after being divided into blocks, which may cause errors and instability problems due to time synchronization. This paper proposes a time synchronization method based on virtual power, which assumes that there is an imaginary virtual circuit composed of resistance and inductance at the common coupling point between different simulation modules. The voltage difference between the two coupling points is used as the input to calculate the consumed power. When the voltage signals at both ends are synchronized, the virtual power is zero, and synchronization is achieved. If the virtual power is not equal to zero, the virtual power is sent to the PI regulator as the error signal, and the output is used to correct the time of the simulator until the virtual power is zero. In this paper, the theoretical analysis and implementation method of this time synchronization scheme are given in detail, and simulation verification is performed. The simulation results show the correctness of the method.