In this study, a new algorithm has been developed for online identification of line outage contingencies. The proposed algorithm is based on two novel parameters i.e., generator bus current deviation index (GBCDI) and line current distribution factor (LCDF). The proposed GBCDI is used to select the principal bus (PB), and therefore a line is selected named as principal line (PL), which is connected with the PB. The proposed LCDF for different contingency cases can be easily calculated and available to the power system operators. Now, the current through PL is monitored, and the PMU provided observed current through the PL is compared with calculated line current using LCDF for different contingency cases via the proposed objective function. Furthermore, PMU error is also incorporated in the objective function to make the developed model realistic. Moreover, for the proposed scheme, the PMUs are required to be placed at generator buses only, and this ensures cost-competitiveness over several existing methods. Additionally, parallel line outage modeling is also demonstrated which reveals the ability of the proposed scheme to identify the outage of parallel line. The proposed technique is applied on IEEE 6 bus, 14 bus, 57 bus, 118 bus systems, and the test results are compared with existing literature. Test results show the superiority of the proposed approach over several existing schemes in terms of identification accuracy and cost-effectiveness.

在这项研究中，已经开发出一种新的算法，用于在线识别线路中断突发事件。所提出的算法基于两个新颖的参数，即发电机母线电流偏差指数（GBCDI）和线路电流分配因子（LCDF）。提议的GBCDI用于选择主体总线（PB），因此选择了一条名为PB的主线（PL）。可以轻松地计算出针对不同突发事件的LCDF提议，并可供电力系统运营商使用。现在，监视通过PL的电流，并通过提出的目标函数，将LCD上提供的PMU提供的观察到的电流与使用LCDF的计算出的线路电流进行比较，以用于不同的意外情况。此外，PMU误差还包含在目标函数中，以使开发的模型具有现实性。此外，对于所提出的方案，PMU只需要放置在发电机母线上，这可以确保在几种现有方法上具有成本竞争力。此外，还演示了并行线路中断模型，该模型揭示了所提出方案识别并行线路中断的能力。将该技术应用于IEEE 6总线，14总线，57总线，118总线系统，并将测试结果与现有文献进行了比较。测试结果表明，在识别精度和成本效益方面，该方法优于几种现有方案。还演示了并行线路中断模型，该模型揭示了所提方案识别并行线路中断的能力。将该技术应用于IEEE 6总线，14总线，57总线，118总线系统，并将测试结果与现有文献进行了比较。测试结果表明，在识别精度和成本效益方面，该方法优于几种现有方案。还演示了并行线路中断建模，这揭示了所提出方案识别并行线路中断的能力。将该技术应用于IEEE 6总线，14总线，57总线，118总线系统，并将测试结果与现有文献进行了比较。测试结果表明，在识别精度和成本效益方面，该方法优于几种现有方案。