Development of high voltage harmonic measuring instrument system for distribution line using optical voltage and current sensor

配电系统中越来越多地使用固态功率转换设备和其他电力电气设备，导致公用事业公司更加关注这些系统上的谐波电压和电流水平。配备有功率转换器和功率因数改善电容器的配电系统特别容易受到电容器故障、通信电路干扰等的影响。因此，不仅需要使用传统的低压谐波分析仪测量配电站的谐波水平，而且需要在现场试验中对高压配电线路进行测量，尝试应用光学测量技术研制配电系统谐波电压和电流测量仪。为了研制以Bi_（12）GeO_（20）晶体作为普克尔盒的高压配电线路谐波电压测量系统，采用氧化锌元件作为电压源， ...更多信息 常春藤。利用R3Fe5O12薄膜作为法拉第元件，对谐波电流测量系统进行了改进，设计了一种光学电流传感器系统。将该系统与传统的谐波分析仪进行了现场试验比较，结果表明，所研制的高压谐波测量装置在实际应用中具有良好的性能。在工业配电线路中，使用高压光学谐波测量仪和低压谐波分析仪进行了现场测试评估。此外，它被证实，在现场测试位置的谐波电压水平在附近的一个通信工厂的配电线路高于在同一配电变电站。在谐波源检测的第一阶段，尝试用反向传播算法确定的神经网络模拟谐波负荷的构成比。少

The increasing use of solid-state power-conversion equipment and other power electric-type devices on power distribution systems is causing utilities to become much more concerned about harmonic voltage and current levels on these systems. A power distribution system equipped with both power converters and power-factor-improvement capacitors is especially vulnerable to capacitor failure, communication circuit interference and so forth. Thus, it is necessary not only measure harmonic levels at the distribution substation by using the conventional harmonic analyzers for low voltage, but also to measure on the distribution lines for high voltage in field test.Application of optically measuring techniques was attempted to develop harmonics voltage and current measuring instruments for distribution systems. To develop the harmonics voltage measuring system using a Bi12GeO20 crystal as a sensing Pockels cell for high voltage distribution lines, zinc oxide elements were adopted as a voltage d … More ivider. An optical current sensor system was improved on the harmonics current measuring system using a R3Fe5O12 film as a Faraday device. The results of the field test by means of the these optical voltage and current sensor systems for high voltage were compared with the them of conventional harmonics analyzers.As a result, it was confirmed that the developed high voltage harmonics measuring devices showed successfully good characteristics in practical use. The field test evaluation was performed with optical harmonic measuring instruments for high voltage and harmonic analyzers for low voltage in an industrial distribution line. Also, it is confirmed that the harmonic voltage level at the field test location in distribution line in the neighborhood of a communication factory is higher than that in the same distributing substation. At the first stage to detect harmonic sources, the simulation of constituent ratio of harmonic loads was tried with the neural network determined by the back propagation algorithm. Less