含DG的主动配电网供电路径优化的研究

Research on Optimization of Power Supply Route of Active Distribution Network Considering DG

含分布式电源（distributed generation,DG）的主动配电网供电路径优化可以提高配电网运行的经济性和可靠性,并达到平衡负荷的目的。不确定性的DG出力、负荷的描述及求解是研究的难点。文中引入区间数以描述DG出力和随机负荷的不确定性,建立了以区间数表示的网络损耗为目标的主动配网供电路径优化模型;在Ybus高斯迭代潮流方程的基础上结合区间分析建立了区间潮流计算模型,对区间的加减法引入仿射运算有效地克服了区间运算过于保守的问题;最后,结合邻域搜索以及克隆选择算法提出了求解上述模型的优化方法,以实现考虑多种不确定因素下配电网供电路径的优化。算例分析验证文中所提方法快速性和有效性。

The optimization of power supply route of distribution network considering distributed generation （DG） can improve its economy, reliability and balance load. It is difficult to describe and solve the uncertainty of DG output and the load capacity. In this paper, the interval analysis was introduced to describe the uncertainty of DG output and the load capacity, and a model for the optimization of power supply route was established. Based on the Ybus Gaussian iterative power flow equation, the interval flow model was established by combining interval analysis. The problem of conservation of the interval operations was effectively solved by adding affme operations to the addition and subtraction of the interval operations. Finally, optimization method was proposed to solve the optimization problem of the distribution network, which is based on neighborhood search and clonal selection algorithm. Examples demonstrate that the proposed method is fast and effective.