基于网络等值法的配电网可靠性研究

Research Based on Reliability-network-equivalent of Distribution System

配电网可靠性评价是电力系统可靠性研究的重要环节,电力部门必需保证配电网的可靠性。为此,介绍了对带有复杂分支馈线的配电网进行可靠性评估的网络等值法的基本原理。该方法用等效元件代替一部分网络分支馈线,从而将复杂网络逐步等值为简单的辐射形配电网,然后通过等效的简单辐射网计算系统的可靠性指标,从而运用可靠性指标对配电网的可靠性进行评价。最后通过实例来验证该等值法的有效性、可行性。

The reliability assessment of distribution network is an important subject in the reliability study of power system. In this paper, a method of reliability-network-equivalent of distribution system is introduced, which is based on analyzing the working mechanism of the distribution system. In this method, some equivalent elements are used to replace some portions of feeders of the distribution network, thus a complex distribution system is decomposed into a series of simple one. Then the reliability indices are calculated in the equivalent network, which are used to evaluate the reliability of distribution system. The validity and feasibility of this method is examined by an example.