CAJ | 학술논문

针对现有基于剩余电流保护技术的漏电保护器存在保护死区的不足,基于正常剩余电流与触/漏电故障电流之间的相位关系,提出电流分离技术,将触/漏电电流从总剩余电流中分离出来.提出了一种新型无死区漏电保护原理,基于DSP对其实施方案进行了研究,并通过数字仿真证明了该方法的正确性和可行性.与现有基于剩余电流幅值和幅值变化量的漏电保护技术进行的对比结果证明,能有效消除保护死区,极大地提高保护装置动作的可靠性.
침대현유기우잉여전류보호기술적루전보호기존재보호사구적불족,기우정상잉여전류여촉/루전고장전류지간적상위관계,제출전류분리기술,장촉/루전전류종총잉여전류중분리출래.제출료일충신형무사구루전보호원리,기우DSP대기실시방안진행료연구,병통과수자방진증명료해방법적정학성화가행성.여현유기우잉여전류폭치화폭치변화량적루전보호기술진행적대비결과증명,능유효소제보호사구,겁대지제고보호장치동작적가고성.
@@@@The residual current protective technique and its major deficiencies are investigated .It is pointed out that the touch/leakage current could be extracted from the total residual current by using current separation technology based on the phase re -lationship between normal residual current and touch /leakage current.A novel leakage current protection principle without protection dead-zone is proposed.The implementation program based on DSP is investigated .The proposed method proves to be accurate and feasible in digital simulations .Compared to the existing techniques either based on residual current amplitude or its variation, the proposed method can effectively eliminate protection dead -zone and drastically improve the reliability of protection devices.