大电网实现信息冗余的广域后备保护系统

Wide-area Backup Protection System With Achieving Redundancy of Information

信息的冗余是提高互联大电网广域后备保护性能的关键,充分利用传统保护装置配置的独立性,可以提高信息的冗余度。在传统保护装置的基础上增加了广域保护系统功能模块,利用方向元件动作信息和线路保护装置距离I段动作信息判断故障元件,当系统故障时可以利用本站和相邻站的方向元件信息、距离元件信息及断路器状态信息,在信息缺失时可以利用信息的冗余确定故障元件。算例分析表明,该保护算法可以很好地适应信息缺失的情况,在多个信息缺失的情况下仍能准确地判断出线路、母线及变压器发生的故障,对故障元件的判断有很高的容错性。

Improving the information redundancy is a key to improve the performance of wide-area backup protection. The traditional digital protection device because of its configuration independence, we can take advantage of this feature to improve the redundancy of information. Paper adds wide area protection system modules on the basis of the traditional protection devices, use the information of direction component motion and action information of the distance protection paragraph I of line protection devices, when System failure, use of the direction information／Distance information and Breaker status information from the substation and the adjacent substation. Using the redundancy information to identified the fault device. Examples show that the proposed protection algorithm can well adapt to the situation of the protection component of information missing, even if a number of protection devices information missing, algorithm can still accurately determine line, bus and transformer fault.