Research on Digital Measurement Method of Electric Energy Based on Positive Sequence Active Power

Abstract:
The traditional electric energy digital measurement method ignores the matching of active power parameters, which leads to large errors in the results of electric energy measurement. Therefore, a digital electric energy measurement method based on positive sequence active power is proposed. The static voltage stability bifurcation point identification method is used to build the zero sequence voltage detection model of digital electric energy metering. Combined with the output stability characteristics of electric energy metering device, the parameter simulation is completed, and the constraint parameter analysis model of digital electric energy metering is built. The positive sequence active power of digital electric energy metering is detected by the method of tracking and identifying the balanced steady-state active power points, and each state point on the curve of digital electric energy metering is calculated. The matching of positive sequence active power parameters of digital electric energy metering is realized by the method of system load parameter detection. The digital and accurate electric energy metering is realized by the method of boundary condition judgment and threshold analysis. The simulation results show that the accuracy of the proposed method is high, and the anti-interference ability is also obviously optimized.