CAJ | 학술논문

为了准确检测出谐振电网单相接地故障，提出一种基于暂态幅值故障测度的故障选线方法。通过模量变换，分析发生故障后的故障馈线和正常馈线，利用电流的小波模极大值特性得出零模初始电流小波模极大值的规律。结合此规律和一般故障测度的定义，定义了暂态幅值故障测度。故障馈线的暂态幅值故障测度最大，正常馈线的暂态幅值故障测度大于0且接近于0，据此检测出故障馈线。理论分析和ATP仿真结果表明，该方法能有效准确地检测出谐振电网单相接地故障，不受消弧线圈的影响，证明了该方法的正确性。
위료준학검측출해진전망단상접지고장，제출일충기우잠태폭치고장측도적고장선선방법。통과모량변환，분석발생고장후적고장궤선화정상궤선，이용전류적소파모겁대치특성득출령모초시전류소파모겁대치적규률。결합차규률화일반고장측도적정의，정의료잠태폭치고장측도。고장궤선적잠태폭치고장측도최대，정상궤선적잠태폭치고장측도대우0차접근우0，거차검측출고장궤선。이론분석화ATP방진결과표명，해방법능유효준학지검측출해진전망단상접지고장，불수소호선권적영향，증명료해방법적정학성。
In order to accurately detect single-phase ground fault in resonant grounding systems, a fault line selection method based on fault transient amplitude measure is proposed. With the modulus transform, feeder fault and normal feeder after fault are analyzed. By using wavelet modulus maxima characteristic current, the law of zero mode initial current wavelet modulus maxima is developed. The transient amplitude fault measures are defined combined with this law and the general fault measures. The transient amplitude fault measure of the fault feeder is maximum, and the normal ones is greater than 0 and close to 0. Accordingly, the fault line selection method is proposed and the fault feeder is detected. Theoretical analysis and ATP simulation results show that, this method can effectively detect single-phase ground fault in resonant grounding systems, and is not influenced by arc suppression coil.