CAJ | 학술논문

在电力系统的运行控制中，一般通过切换不同变压器的中性点接地刀闸，实现全网变压器中性点接地数目基本不变，从而达到保持整个电网零序网络基本不变的目的。为了规避变电站失去变压器中性点所带来的风险，在研究变压器中性点自动控制可行性的基础上，提出了一种在变电站内就地实现，直接通过点对点的合闸回路控制接地刀闸的方案。该方案解决了长期以来靠人工操作中性点接地刀闸，操作过程复杂，操作间隔时间过长及危及人身安全等问题。
재전력계통적운행공제중，일반통과절환불동변압기적중성점접지도갑，실현전망변압기중성점접지수목기본불변，종이체도보지정개전망령서망락기본불변적목적。위료규피변전참실거변압기중성점소대래적풍험，재연구변압기중성점자동공제가행성적기출상，제출료일충재변전참내취지실현，직접통과점대점적합갑회로공제접지도갑적방안。해방안해결료장기이래고인공조작중성점접지도갑，조작과정복잡，조작간격시간과장급위급인신안전등문제。
In the operation and control of the power system, in general,the ground switches at the neutral point of different transformers are switched to make the number of the transformer neutral point groundings unchanged,so that the zero sequence network of the whole power grid remains unchanged. To avoid the risks due to loss of the transformers’neutral points in a substation,and based on the feasibility of the automatic control of the transformer neutral points,this paper proposes a new solution,with which the ground switches are controlled through the point-to-point reclosing circuit within one substation. This solution helps to solve those problems in the conventional practice such as manual labor-costing operation,complicated procedure and possible safety risks.