配电系统可靠性及静态安全性评估中的潮流计算

为了提高配电网可靠性评估结果的精确度 ,需要在网络连通性分析基础上进行潮流计算。论文阐述了一种应用于辐射状配电网可靠性评估的潮流计算方法 ,其雅可比矩阵具有 UDUT 的形式 ,其中 U是仅由系统拓扑结构确定的定上三角矩阵 ,D是一个块对角矩阵。针对配电网的特点 ,应用直流潮流模型 ,将配电网馈电线用等值电抗表示 ,用前代回代进行求解的方法 ,能够获得较快的计算速度。通过实际系统的算例 ,证明了这种算法的优点。

Flow analysis of distribution system used for reliability and static security evaluation

Evaluation of distribution network reliability can be improved by calculating the power flow using network connectivity analysis. A new flow calculation method was presented for reliability evaluation of radial distribution systems. In the method, the Jacobian matrix is characterized by the UDU T form, where U is a upper triangle matrix determined by the topological structure of the system and D is a partition diagonal matrix. A DC flow model was used for distribution systems which use an equivalent reactance to describe the network. A sample calculation shows validity and effectiveness of the method.