基于多维虚拟电流差动母线保护研究与应用

[目的] 为了实现母线倒闸操作过程中母线保护在隔离刀闸出错情况下，仍然可以可靠快速地切除故障母线，提出了母线双位置刀闸配置与虚拟电流差动量互校原理，并对其进行了理论分析和动态模型仿真测试。 [方法] 基于上述需求，利用刀闸的双位置信息辅助虚拟电流差动逻辑，则可以很好地解决变电站倒闸过程中出现的问题。 [结果] 母线保护接入刀闸双位置信息从数学量化理论来说，降低了位置错误的可能性，再辅以虚拟电流差动逻辑来纠错，能很好的避免变电站倒闸操作出现问题导致母线无选择性的跳闸。 [结论] 母线保护接入双位置刀闸辅助开入，并辅以虚拟差动逻辑判据，可有效对倒闸操作过程中发生的刀闸位置异常进行纠错处理，从而确保母线保护的选择性和可靠性。

Research and Application of Busbar Protection Based on Multidimensional Virtual Current Differential

[Introduction] Paper aims that the busbar protection can reliably and quickly remove the fault bus when the disconnecting switch is wrong in the process of bus switching operation, the principle of bus double-position switch configuration and virtual current differential mutual calibration is put forward, and its theoretical analysis and dynamic model simulation test are carried out. [Method] Based on the above requirements, the virtual current differential logic assisted by dual position information of switch can solve the problems in the switching process of substation. [Result] In terms of mathematic quantization theory, the double position information of bus protection cutter and switch reduces the possibility of location error, and then assisted by virtual current differential logic to correct the error, can very well avoid substation switching operation problems leading to bus non-selective tripping. [Conclusion] Busbar protection can be connected to double-position switch auxiliary opening and assisted by virtual current differential logic criterion, which can effectively correct the abnormal position of switch during switching operation for bus, thus ensuring the selectivity and reliability of bus protection.