熊德智,周纲,温和,郑小平.面向冲击负荷的新型电能表关键技术研究[J].电测与仪表,2023,60(1):187-192. XIONG De-zhi,zhougang,Wen he,zheng xiaoping.Research on key technology of new meter for impact load[J].Electrical Measurement & Instrumentation,2023,60(1):187-192.
面向冲击负荷的新型电能表关键技术研究
Research on key technology of new meter for impact load
The nonlinear impact load will have a large impact on the current, voltage and frequency of the metering point, which will cause more serious energy metering errors. Based on the analysis of the influence of nonlinear impact load on the measurement error, the impact load model is established, and a more accurate impact load simulation method is given. Based on this, the measurement performance of the conventional meter is analyzed, and the design of the impact load meter is obtained. The scheme gives the design principle of the impact load meter, designs the high-speed AD sampling circuit of voltage and current, gives the design method of zero-flux current transformer, proposes an impact load measurement method and algorithm, and gives the impact load filtering algorithm and specific parameters based on the IIR low-pass filter. A new type of impact load energy meter is designed. On the basis of the impact load model, the typical experimental environment of impact load is designed. The test is carried out under the conditions of transient impact load, short-term impact load and long-term impact load. The experimental results show that the designed the impact load energy meter can accurately measure the impact load energy.
