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Real-Time Analysis of Power System Protection Schemes Using Synchronized Data

机译:利用同步数据对电力系统保护方案进行实时分析

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An error in a power system protection scheme can result in unwanted tripping of healthy lines or delay in the removal of a fault from the network, thus affecting the power system stability. Online identification of such an error provides scope to initiate remedial measures, thereby preventing possible cascade tripping situations. In this paper, a method for real-time analysis of protection decision in a power system is proposed. This method identifies the relay, which has maloperated for an event in the network. For analysis of a relay operation, synchrophasor data from selected locations are obtained depending on the network topology. A function is developed utilizing indices calculated from the synchronized data. Based on the calculated value of the function during an event, the correctness of the protection decision is validated. Results obtained from PSCAD/EMTDC simulations for the New England 39-bus system demonstrate the performance of the proposed method.
机译:电力系统保护方案中的错误会导致正常线路意外跳闸或延迟从网络中排除故障,从而影响电力系统的稳定性。在线识别此类错误提供了采取补救措施的范围,从而防止了可能的级联跳闸情况。本文提出了一种电力系统中保护决策的实时分析方法。此方法标识中继,该中继已针对网络中的事件进行了限制。为了分析中继操作,根据网络拓扑结构从选定位置获取同步相量数据。利用从同步数据计算出的索引来开发功能。基于事件期间功能的计算值,可以验证保护决策的正确性。从PSCAD / EMTDC对新英格兰39总线系统的仿真中获得的结果证明了所提出方法的性能。

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