CAJ | 학술논문

为确保主变压器的安全运行,四川泸州川南发电有限责任公司在220 kV主变压器中性点加装隔直装置和限流电抗器,以大幅减小单相接地故障时流过主变压器的故障电流,并抑制近区直流输电线路不对称方式运行时流过主变压器中性点的直流电流,经过仿真计算分析,加装隔直装置和限流电抗器后对线路保护、主变压器保护、发电机保护均不会造成较大影响.
위학보주변압기적안전운행,사천로주천남발전유한책임공사재220 kV주변압기중성점가장격직장치화한류전항기,이대폭감소단상접지고장시류과주변압기적고장전류,병억제근구직류수전선로불대칭방식운행시류과주변압기중성점적직류전류,경과방진계산분석,가장격직장치화한류전항기후대선로보호、주변압기보호、발전궤보호균불회조성교대영향.
In order to ensure the safe operation of main transformer , Sichuan Luzhou Chuannan Power Generation Co .Ltd in-stalls neutral DC current blocking device ( NCBD ) and current limiting reactor in neutral point of 220 kV main transformer to significantly reduce the single -phase fault current when occurring single -phase earth fault in high -voltage side of main transformer, and suppress the DC current flowing through neutral point of main transformer when the nearby HVDC transmis -sion lines is not in symmetry operating mode .The simulation calculation and analysis show that the influence on line protec-tion, main transformer protection and generator protection are not obvious after installing NCBD and current -limiting reactor in neutral point of 220 kV main transformer .