close-in fault meaning in Chinese

近距离故障
近区故障

The operation characteristic of the new relay is analyzed in theory and verified by the simulation tests . the new relay operates with clear selectivity and high operation speed and can satisfy the demand of the protection for the ehv transmission line . the performance of the fault component impedance relay has been improved and the misoperaion of the healthy phase under cross - country fault and close - in fault have been avoided
理论分析及仿真计算表明，基于自适应补偿的突变量距离继电器有很好的选择性和速动性，完全能够满足高压线路保护的需要，显著提高了突变量距离的性能，解决了其在大电源出口单相故障以及正反向复故障可能会误跳三相的缺点。