三相电力系统非对称断相状态计算的改进方法

AN IMPROVED METHOD OF CALCULATION FOE UNSYMMETRICAL OPEN CONDUCTOR STATES IN THREE-PHASE POWER SYSTEMS

本文在不修改原网络节点导纳或节点阻抗矩阵的基础上,应用迭加原理与补偿定理计算三相电力系统非对称断相状态下的电气量值。本算法较惯用算法具有计算精度高、速度快、灵活方便等特点,适用于电力系统设计、运行、保护与自动装置的整定、以及事故分析中的非对称断相计算。

In this paper, the superposition and compensation theorems are employed to calculate the electric values under the unsymmetrical open conductor states in the three-phase power systems without modifying the bus admittance or the impedance matrices of the original networks. In cotrast with conventional algorithms, the method proposed here is highly accurate, fast, convenient and flexible. It can be applied to the unsymmetrical open conductor calculations which offered in power systems for its design and operation, to determine the settings of relay and automatic deyices, as well as accident analysis.