电子式互感器误差校准的研究

电子式互感器是智能电网建设的关键设备之一,其性能直接影响到数字化变电站的安全和经济效益,也是电能计量准确的必要条件。电子式互感器的输出与传统互感器不同,分为数字输出和模拟输出两种,因此传统的互感器校准方法已经不适用于校准新型的电子式互感器。文章以模拟量输出的互感器为例,创新性地提出了采用精密分流器和示波器测量比值差和相位差,并对校准数据进行了验证,测量结果满意。

Research on Electronic Instrument Transformer Error Calibration

Electronic instrument transformer is one of the key equipments for the construction of smart grid, of which performance directly influences safety and economic benefit of digital substation and the necessary condition of accurate power measurement. The output signal of electronic instrument transformers is different from that of conventional electromagnetic transformers, which is classified into digital output and analogue output. Therefore, conventional calibration methods are not suitable for testing electronic instrument transformers. This paper takes electronic instrument transformer with analogue output as example; innovatively put forward employing precise shunt and oscilloscope to measure ratio error and phase displacement. Meanwhile, the data were verified and the results were satisfied.