基于分层前推回代法的配电网潮流计算研究

Research on Layered Forward and Backward Substitution Method of Distribution Network of Power Flow

配电网电力系统与输电网相比具有特殊性,传统的用于计算电力系统潮流的高斯塞德尔迭代法、牛顿迭代法等已经不适用于复杂的配电网电力系统。因此本文在前推回代潮流计算方法的基础上引入了分层的概念,将电力系统中的所有电气节点、支路进行分层,再分别从叶节点和根节点开始进行前推和回代运算,不仅有效提高了电力系统潮流计算的速度,而且可用于多节点、多支路的并行计算中。通过算例验证,并与EMTDC运算结果相对比,证明该方法具有较高的准确性。

The power system of the distribution network is special in comparison with the transmission network. The traditional Goss-Seidel iterative method and Newton iteration method used to calculate the power flow of the power system have not been applied to the complex distribution network power system. Therefore, based on the forward backward and forward power flow calculation method, the concept of stratification is introduced to divide all the electrical nodes and branches in the power system, then proceed from the leaf node and root node to push forward and back generation operations respectively. It not only effectively improves the speed of power flow calculation, but also can be used in parallel computing with multiple nodes and multiple branches. The example is verified and compared with the result of EMTDC operation. It is proved that the method is of high accuracy.