CAJ | 학술논문

发电机组转子偏心是一个普遍存在的现象，严重的转子偏心将影响发电机组转子一点接地保护的正确运行。结合转子对地电容对转子一点接地保护的影响，提出了可调节2种周期时间的注入方波转子接地保护方法。通过调节方波极性变换周期的大小，避免了由于转子对地电容引起的转子一点接地误报。通过调节直流分量采样计算窗口周期的大小，避免了由于转子偏心引起的转子一点接地误报。该方法对于各类机组由于转子对地电容和转子偏心引起的转子一点接地误报现象起到了很好的抑制作用，基本解决了长期以来困扰转子一点接地保护运行不稳定的问题。
발전궤조전자편심시일개보편존재적현상，엄중적전자편심장영향발전궤조전자일점접지보호적정학운행。결합전자대지전용대전자일점접지보호적영향，제출료가조절2충주기시간적주입방파전자접지보호방법。통과조절방파겁성변환주기적대소，피면료유우전자대지전용인기적전자일점접지오보。통과조절직류분량채양계산창구주기적대소，피면료유우전자편심인기적전자일점접지오보。해방법대우각류궤조유우전자대지전용화전자편심인기적전자일점접지오보현상기도료흔호적억제작용，기본해결료장기이래곤우전자일점접지보호운행불은정적문제。
The generator rotor eccentricity is a common phenomenon, and severe rotor eccentricity will affect the proper operation of that ground fault （GF） protection. Concerned with the impacts generated by rotor-to-ground capacitance on rotor one point GF protection, a method with adjustable two periods injecting square wave rotor GF protection is proposed. By adjusting the period of square wave polarity transformation, the rotor one point GF false alarm caused by the rotor-to-ground capacitance is avoided. By adiuSting the direct current component of sampling computation window period, the rotor one point GF alarm caused by the rotor eccentricity is thus avoided. This method plays a good inhibitory effect to one point GF false alarm for all kinds of generator Units due to the rotor-to-ground capacitance or the rotor eccentricity, which could solve unstable operation oroblem of rotor one ooint GF.