王磊,史苏苏.基于调感谐振的GIL出线互感器误差校验方法研究[J].电测与仪表,2019,56(4):32-36,42. Wang Lei,Shi Susu.Study on the error test based on adjustable reactor resonancein GIL voltage transformers[J].Electrical Measurement & Instrumentation,2019,56(4):32-36,42.
基于调感谐振的GIL出线互感器误差校验方法研究
Study on the error test based on adjustable reactor resonancein GIL voltage transformers
In the error check of electromagnetic potential transformer in gas insulated metal enclosed transmission line (GIL), the selection and combination of resonant power system are key problems. Consequently, this paper introduced the use of combined adjustable reactor to solve the voltage boosting in GIL, and analyzed the mathematical model of the system. The concept of relative detuning at power frequency resonance was presented. the factors which restricted the voltage gain were also analyzed. In addition, the use of secondary voltage drop tester for error checking was proposed. The key parameters measurement and test steps were given. Finally, taking the error test in GIL electromagnetic voltage transformers of Nuozhadu hydropower station as an example, experiment results have been given to verify theSfeasibility and validitySof this method