CAJ | 학술논문

介绍了∏型接线的高压直流滤波电容器组不平衡保护原理和整定值计算方法。提出在部分电容器单元故障后，以滤波器的失谐度和剩余完好电容器单元上的过电压水平作为保护计算的依据。给出电容器单元或者元件故障后不平衡电流保护整定值计算公式。分别对内熔丝型电容器和无熔丝型电容器进行了分析，分析了部分不平衡电容器保护动作行为，并与计算结果进行了比较。
개소료∏형접선적고압직류려파전용기조불평형보호원리화정정치계산방법。제출재부분전용기단원고장후，이려파기적실해도화잉여완호전용기단원상적과전압수평작위보호계산적의거。급출전용기단원혹자원건고장후불평형전류보호정정치계산공식。분별대내용사형전용기화무용사형전용기진행료분석，분석료부분불평형전용기보호동작행위，병여계산결과진행료비교。
The paper mainly gives an account of the principles of calculating the settings of unbalanced current protection for ∏configuration of capacitor banks of high voltage direct current(HVDC)filters.It is first proposed that,following the failure of part of the capacitor units,the permitted detuning of the filters and the over-voltage level on the remaining capacitor units in good condition are taken as the basis for protection calculation.The formulae are deducted to calculate the settings of unbalanced current protection in cases where failures of some capacitor units or elements occurred.Based on the calculations of settings for both interfused and fuseless capacitors,the behavior of part of the unbalanced current protection are analyzed and compared with calculation results.