Design of Key Technology for DC Charging Pile Power Metering
Aiming at the current direct current(DC)charging pile power metering problems of low metering efficiency,large error,large power ripple,and inability to remotely monitor,the charging pile metering circuit is designed.The hardware circuit of instantaneous value of three-phase alterating curent(AC)active power is realized through the principle of hardware multiplier cascade,which can quickly obtain the data information of AC active power output in the time domain.By turning the original multiple information output into a single DC signal,it provides μs-level AC active power signals for the simultaneous measurement of dual-channel analog-to-digital converter(ADC).Through the incremental compensation control output module to compensate the power grid voltage and the actual output voltage difference,to improve the accuracy of the charging pile test power.The DC charging pile can remote wireless communication,realize the multi-region multi-client interface and on-site operation terminal interface operation process and data real-time synchronization,greatly improve the DC charging pile power measurement ability.The test results show that the design has low error and high metering efficiency.
Power girdDirect current(DC)charging pilePower meteringRemote monitoringHardware multiplierIncremental compensation
万方数据
维普
