李鹤.变电站用电流互感器在线校准系统的研制[J].电测与仪表,2013,50(12):. .Research on the on-line calibration technology for power instrument transformers[J].Electrical Measurement & Instrumentation,2013,50(12):.
变电站用电流互感器在线校准系统的研制
Research on the on-line calibration technology for power instrument transformers
For a long time, according to the traditional method, the transformers need to be taken out of service from the power system to carry out the calibration test. It’s a hard, time-consuming work, and some transformers even can’t be in outage. A current transformer in substation on-line calibration system was developed. This paper describes the structure, principle and test results of the main parts of the system, including clamp-type electronic current transformer and error measurement device. A simulation test was designed to verify the measurement performance of the system in high voltage. The on-line calibration test for the current transformer in an 110kV substation using this system was carried out successfully. The results show that the system can be used to evaluate the error characteristics of the current transformers in its actual working condition, avoiding the service outage of the lines.
