含风电机组的配电网重构研究

Research of the configuration of distribution network with wind turbines

提出基于多场景技术的含风电机组配电网重构方法。根据每个基本回路必有一个开关开断的特点,给出了三个确定重构过程中必闭合开关的规则,增加了必闭合开关的数量,减少了Minty算法生成树数量。根据支路交换法网损估算公式得出:只有在风机输出功率变化到一定值时才需重构的特点,给出快速获得Monte-Carlo模拟的每个场景优化方案算法,不必一一重构每个场景,取包含场景最多的重构方案,更适应风电机组输出功率随机性。算例结果验证了算法的有效性。

This paper proposes a distribution network reconfiguration method with wind turbines based on multiply scenario technique. Three rules are presented according to the characteristic that each basic circle has an open switch. These rules increase the number of closed switches during the process of reconfiguration and decrease the number of spinning trees produced by Minty algorithm. Based on the network loss estimation formula, it is concluded that the reconfiguration need not to be performed unless the output power of wind turbine changes to a certain value. Based on the above conclusion the optimal solution for each scenario obtained by Monte-Carlo simulation can be fast determined. Thus it needs not to calculate each scenario. The solution including most scenarios is the result solution. The proposed method is more adaptable than the scheme that gets the solution of the scenario with the most probability. The calculation results verify the feasibility of the proposed algorithm.