自适应接地距离继电器的研究

Study on Adaptive Ground Distance Relay

接地距离继电器要解决的关键问题之一是提高其耐受过渡电阻的能力。在分析自适应接地距离继电器动作特性的基础上,提出了对自适应动作特性的修正方法,从而使修正后的自适应接地距离继电器既有很强的抗过渡电阻能力,又能有效地防止暂态超越。仿真结果证实了这种继电器具有良好的自适应性和选择性。

One of the critical problems that need to be solved by a ground distance relay is to improve the capacity of the earth-fault resistance endurance of the relay. The modification of adaptive operating characteristic, based on the analysis of adaptive operation characteristic of current adaptive ground distance relay, is proposed. The modified adaptive ground distance relay can effectively avoid transient-state overreach, and reflect the earth-fault up to a super high resistance. Simulations show that the proposed new adaptive ground distance relay has excellent adaptability and selectivity.