计及节点-线路重要度的配网实时健康状态评估

随着大量分布式光伏的接入，配电网运行状态变得更为复杂。为准确的评估配电系统实时健康状态，提出一种计及网络节点与线路重要度的配电网实时健康状态评估方法。首先，考虑光伏接入网络最优潮流、负荷重要性和某节点停运后的负荷损失对LeaderRank算法进行改进，考虑某节点停运后的功率损失和节点LR值对负荷矩算法进行改进，利用改进的电气LeaderRank算法和线路负荷矩算法对配电网中节点与线路重要度进行评估；然后，基于配电设备运行的电气量与非电气量参数分别计算配电节点与线路的健康指数。综合考虑配电网中节点与线路的健康度和重要度计算配电网的健康指数，判断配电网的健康状态。最后，以某地10 kV配电网为例，得到其健康指数为2.266 3,处于一般缺陷状态，适当提高该配电网中分布式光伏渗透率，其健康状态有所改善，证明所提方法的有效性与合理性。

Real-time health assessment of distribution network considering node-line importance

With the access of a large number of distributed photovoltaics, the operation status of the distribution network has become more complex. In order to accurately evaluate the real-time health status of distribution system, a real-time health status assessment method of distribution network is proposed, which takes into account the importance of network nodes and lines. First, consider the optimal power flow, load importance and load loss of a node in the photovoltaic access network to improve the LeaderRank algorithm, consider the power loss after a node outage and the LR value of the node to improve the load moment algorithm, use the improved electrical LeaderRank algorithm and line load moment algorithm evaluate the importance of nodes and lines in the distribution network. Then, based on the electrical and non-electrical parameters of the operation of the distribution equipment, the health indices of the distribution nodes and lines are calculated respectively. Comprehensively consider the health and importance of nodes and lines in the distribution network to calculate the health index of the distribution network to judge the health status of the distribution network. Finally, taking a 10 kV distribution network as an example, the health index is 2.266 3, which is in a general defect state.The health of the distributed PV system has been improved by appropriately increasing the PV penetration rate in the distribution network, which further verifies the effectiveness and rationality of the proposed method.