含分布式电源的配电网无功配置优化

发布时间：2018-04-16 21:36

本文选题：配电网 + 无功配置优化　；参考：《西安科技大学》2017年硕士论文

【摘要】：无功配置优化是保证配电网安全经济运行的有效手段,在考虑分布式电源(distributed generation,DG)接入的配电网中尤为重要。由于不同种类分布式电源的输出特性不同,需要对用于传统配电网计算分析的相关算法进行改进和完善。因此,建立含分布式电源的无功配置优化模型和寻找与其相适应的优化算法具有重要意义。在分析了分布式电源接入位置与接入容量对配电网潮流分布和网络损耗的影响的基础上,根据不同DG的并网及控制特性,将DG等效为PQ、PV、PI、PQ(V)节点,并采用改进的前推回推方法对含DG的配电网进行潮流计算。在考虑负荷波动和DG出力的情况下,建立了以三种运行场景下综合电能损耗费用与设备投资费用之和最小为目标函数,以功率平衡、节点电压不越限、无功不倒送为约束条件的优化数学模型。为提高搜索效率、减小计算量、避免“维数灾”,采用以网损灵敏度确定补偿点顺序,以粒子群优化算法确定补偿容量相结合的无功优化算法。并给出了该算法的实现流程。编写含分布式电源配电网无功优化程序,通过IEEE33节点算例和某实际配电网算例对所研究的无功配置优化模型和求解算法进行验证,结果表明,该算法能有效求解含分布式电源的配电网无功配置优化问题,得到的优化方案合理、可行。
[Abstract]:Reactive power allocation optimization is an effective means to ensure the safe and economical operation of distribution network, especially in the distribution network where distributed generation and DGG are considered.Due to the different output characteristics of different types of distributed generation, it is necessary to improve and improve the relevant algorithms used in traditional distribution network calculation and analysis.Therefore, it is of great significance to establish an optimal reactive power allocation model with distributed power supply and to find an appropriate optimization algorithm.Based on the analysis of the influence of the access location and capacity of distributed generation on the power flow distribution and network loss of distribution network, according to the characteristics of grid connection and control of different DG, the DG is equivalent to the PQN PVPI PQV) node.The power flow calculation of the distribution network with DG is carried out by using the improved forward push-back method.Under the consideration of load fluctuation and DG output, the objective function is the minimum sum of the integrated power loss cost and the equipment investment cost in three operation scenarios, with the power balance and the node voltage not exceeding the limit.The optimal mathematical model of reactive power is a constraint condition.In order to improve the search efficiency, reduce the amount of calculation and avoid the "disaster of dimension", the reactive power optimization algorithm combined with particle swarm optimization is used to determine the compensation point order by the sensitivity of network loss and the compensation capacity by particle swarm optimization.The realization flow of the algorithm is also given.The reactive power optimization program with distributed generation is written, and the optimization model and algorithm of reactive power allocation are verified by IEEE33 node and an actual distribution network example. The results show that,The algorithm can effectively solve the reactive power allocation optimization problem of distribution network with distributed generation, and the optimized scheme is reasonable and feasible.
【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM714.3

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