基于故障附加状态的测距式距离继电器

Measuring Distance Relay Based on Additional Fault State

在分析了各种短路故障类型下故障点附加电源的基础上，提出了一种基于故障附加状态的测距式距离继电器，推导出在各种故障类型下短路点金属性短路和经过渡电阻短路对应的各种测距算法，并归纳为两种基本类型—相间故障和接地故障两种算法，根据算法计算出的电抗分量与整定值比较来判断故障点的范围。阐述了它的可行性及工作原理，通过对系统振荡、过渡电阻、交流回路失压等各种情况下动作行为的分析，揭示了它从根本上解决了传统阻抗继电器存在的问题。

The paper analyses different additional fault sources at a fault point under different kinds of fault and presents a kind of measuring distance relay,deduces different measuring algorithms corresponding to metallicity short-circuit and transition resistor short-circuit under different kinds of fault,inducts two general types of phase-phase fault and phase-ground fault.According to the resistance of line,the fault range can be determined.The paper presents the feasibility and working principle of the relay.It has been proved by analyzing its performance under some conditions such as system vibration,transition resistor,no-voltage of AC circuit,that this kind of relay is capable of overcomings the shortcoming of traditional one.