| 张江安,杨洪柏.用于电能计量芯片的无功功率计量方法[J].电子测量与仪器学报,2020,34(2):188-194 |
| 用于电能计量芯片的无功功率计量方法 |
| Reactive power metering method for power metering chips |
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| DOI： |
| 中文关键词: 电能计量芯片 无功功率计量 高精度 低成本 |
| 英文关键词:energy metering chip reactive power metering high precision low cost |
| 基金项目:上海工程技术大学高职学院科技发展基金项目（GZ18 1）、上海开放大学2018年度学科研究项目（KX1805）资助 |
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| 中文摘要: |
| 现有电能计量芯片中无功功率计量电路难以同时满足计量精度高与硬件开销小的要求。为解决此问题，提出了一种无功功率计量的新方法，该方法采用3个一阶IIR滤波器，其中电压通道内的相位移动滤波器使电压信号产生-90°相移，电压通道和电流通道内的两个幅度补偿滤波器共同对由相位移动滤波器产生的信号幅度衰减进行补偿。两个幅度补偿滤波器被要求设计成具有相同的结构和参数，二者的并联应用不会改变电压与电流之间的相位差。提出了高效的无功功率计量系统设计方法，其中特别是幅度补偿滤波器设计的优化方法。仿真和实际产品测试结果表明，该无功功率计量方法不仅硬件资源消耗较少，而且可以达到较高的计量精度，优于现有电能计量芯片的无功功率计量方法。 |
| 英文摘要: |
| Reactive power metering circuit in existing power metering chips cannot meet the requirements of high metering accuracy and low hardware overhead at the same time. In order to solve this problem, a new method of reactive power metering is proposed, which uses three first order IIR filters, in which the phase shift filter in the voltage channel makes the voltage signal shift -90 degrees phase. The two amplitude compensation filters in the voltage channel and the current channel jointly compensate for the attenuation of the signal amplitude generated by the phase shift filter. The two amplitude compensation filters are required to be designed to have the same structure and parameters, thus their application in parallel mode will not change the phase difference between voltage and current. The design method of efficient reactive power metering system is proposed, especially the optimization method of amplitude compensation filter design. The simulation and actual product test results show that the reactive power metering method not only consumes less hardware resources, but also achieves high metering accuracy, which is better than the reactive power metering methods of the existing power metering chip. |
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