In order to increase the stability of the Mongolia power system, a single-phase automatic reclosing device (SPAR) was introduced on double-circuit power lines built with a size of 330 kV, operating on a voltage of 220...In order to increase the stability of the Mongolia power system, a single-phase automatic reclosing device (SPAR) was introduced on double-circuit power lines built with a size of 330 kV, operating on a voltage of 220 kV and a length of 250 km. These overhead power lines (L-213, L-214) connect the 220/110/35 kV “Songino” substation with the “Mandal” substation and form system networks. This paper presents the challenges encountered when implementing single-phase automatic reclosing (SPAR) devices and compares the changes in power system parameters before and after SPAR deployment for a long 220 kV line. Simulations and analyses were carried out using DIgSILENT PowerFactory software, focusing on rotor angle stability, and the overall impact on the power system during short-circuit faults. The evaluation also utilized measurement data from the Wide Area Monitoring System (WAMS) to compare system behavior pre- and post-implementation of SPAR. The findings reveal that SPAR significantly enhances system reliability and stability, effectively mitigating the risk of oscillations and stability loss triggered by short circuits. This improvement contributes to a more resilient power system, reducing the potential for disturbances caused by faults.展开更多
液压机构断路器现今在超特高压电网中被广泛采用,其机构压力正常与否不仅直接影响断路器的工作,也关乎断路器保护重合闸装置的正确动作,对于压力低闭锁重合闸功能的实现,我国断路器保护中多采用直接闭锁和经操作箱闭锁两种方式,在阐述...液压机构断路器现今在超特高压电网中被广泛采用,其机构压力正常与否不仅直接影响断路器的工作,也关乎断路器保护重合闸装置的正确动作,对于压力低闭锁重合闸功能的实现,我国断路器保护中多采用直接闭锁和经操作箱闭锁两种方式,在阐述其原理后以某变电站500 k V断路器为例介绍了两种闭锁方式的实现原理,并详细分析了该变电站压力低闭锁重合闸回路存在的问题,具有一定代表性,可为超特高压变电站运维、设计提供参考。展开更多
文摘In order to increase the stability of the Mongolia power system, a single-phase automatic reclosing device (SPAR) was introduced on double-circuit power lines built with a size of 330 kV, operating on a voltage of 220 kV and a length of 250 km. These overhead power lines (L-213, L-214) connect the 220/110/35 kV “Songino” substation with the “Mandal” substation and form system networks. This paper presents the challenges encountered when implementing single-phase automatic reclosing (SPAR) devices and compares the changes in power system parameters before and after SPAR deployment for a long 220 kV line. Simulations and analyses were carried out using DIgSILENT PowerFactory software, focusing on rotor angle stability, and the overall impact on the power system during short-circuit faults. The evaluation also utilized measurement data from the Wide Area Monitoring System (WAMS) to compare system behavior pre- and post-implementation of SPAR. The findings reveal that SPAR significantly enhances system reliability and stability, effectively mitigating the risk of oscillations and stability loss triggered by short circuits. This improvement contributes to a more resilient power system, reducing the potential for disturbances caused by faults.
文摘液压机构断路器现今在超特高压电网中被广泛采用,其机构压力正常与否不仅直接影响断路器的工作,也关乎断路器保护重合闸装置的正确动作,对于压力低闭锁重合闸功能的实现,我国断路器保护中多采用直接闭锁和经操作箱闭锁两种方式,在阐述其原理后以某变电站500 k V断路器为例介绍了两种闭锁方式的实现原理,并详细分析了该变电站压力低闭锁重合闸回路存在的问题,具有一定代表性,可为超特高压变电站运维、设计提供参考。
