震后紧急供电的电力网络安全检测研究

当前震后紧急供电安全检测方法忽略了电网节点的三相电流不对称问题，未计算电力网络节点功率、支路电流及网损，导致电力网络进行节点连通安全检测准确率低。据此提出震后紧急供电的电力网络安全检测方法，根据连通度矩阵电力网络节点的工作参数，电力网络潮流计算不同节点的电压向量。利用快速耦合法优化牛顿拉夫逊法的计算速度，求出节点功率、支路电流及网损数值。以所构建的电力网络节点连通安全检测模型为基础，采用蒙特卡洛方法完成震后紧急供电的电力网络安全检测。经实验证明，所提方法可有效检测震后紧急供电的电力网络节点安全性，当震动加速度分别为0.05 gal、0.20 gal、0.80 gal时，实验对象连通安全检测结果分别为较高、中等和极低状态，与实际结果均一致，说明所提方法能准确检测电力网络节点连通的安全性。

Power Network Security Detection for a Post-EarthquakeEmergency Power Supply

Current safety detection methods for emergency power supply following an earthquake generally ignore the three-phase current asymmetry of the power grid node; nor are node power of the network, branch current, and network loss calculated. This results in low accuracy in node network safety detection. Based on this premise, a power network security detection method for emergency power supply following earthquakes is proposed. According to the operation parameters of the connectivity matrix power network node, the voltage vector of different nodes was obtained using the power flow calculation. The fast-coupled method was used to optimize the calculation speed of the Newton-Raphson method, and node power, branch current, and network loss values were calculated. Based on the constructed safety detection model of the power network node connectivity, the Monte Carlo method was used to accomplish the power network security detection for emergency power supply following an earthquake. The experimental results showed that the proposed method could effectively detect the safety of power network nodes for post-earthquake emergency power supply. When the vibration acceleration was 0.05 gal, 0.20 gal, and 0.80 gal, the safety test results of the experimental objects were high, medium, and extreme, respectively, which was consistent with the actual results, and indicated that the proposed method can also accurately detect the security of the connectivity of power network nodes.