Development of the test platform for the characteristics of the Rogowski coil electronic current transformer

In order to comprehensively evaluate and improve the performance of the Rogowski coil electronic current transformer (RCECT), this paper presents a method for steady state characteristic and the dynamic characteristic test. The testing scenario is configured in an electromagnetic transient simulation software (PSCAD), then the digital signals are reproduced as analog signals by amplifiers. The sensor head is also implemented in PSCAD as a model, to avoid the reproduction of large current. The actual circuitry in the RCECT (Data acquisition card and Merging Unit: MU) is connected to the output of reproduced analog signal to test the dynamic behavior of RCECT under various fault excitation. The time-delay characteristic test, power frequency and harmonic transmission characteristic test, linearity characteristic test and dynamic response characteristic test of several samples, are presented. It is proved that the proposed test method can effectively test the performance of RCECT.