考虑分布式发电的农村弱环配电网潮流计算方法

发布时间：2018-10-11 12:44

【摘要】：分布式电源引入农村配电网后,网络结构发生改变,传统潮流算法将不再适用。基于农村配电网络拓扑结构特点,提出一种适用于含分布式电源的农村弱环配电网改进前推回代算法,算法建立了支路电流-节点电流关联矩阵;同时,将分布式电源以PQ、PV型节点引入农村配电网,对于P、V恒定型分布式电源,提出一种新的模型,利用新增虚拟节点和带有电抗的虚拟支路与该PV型节点相连,通过注入无功来维持电压为恒定值。通过33节点配电系统验证所提算法的正确性和有效性,并将分布式电源和环网对系统电压和有功损耗的影响进行了计算和比较分析。结果表明,该文提出的方法计算简单,具有良好的收敛性,而且分布式电源及环网对节点电压改善效果明显,其中PV型DG对电压提升效果最为突出。
[Abstract]:After distributed generation is introduced into rural distribution network, the network structure changes and the traditional power flow algorithm is no longer applicable. Based on the characteristics of rural distribution network topology, an improved forward push-back algorithm for rural weak ring distribution network with distributed generation is proposed, which establishes the branch current-node current correlation matrix. In this paper, PQ,PV node is introduced into rural distribution network, and a new model is proposed to connect the PV node with the new virtual node and the virtual branch with reactance. The voltage is maintained at a constant value by injecting reactive power. The validity and validity of the proposed algorithm are verified by a 33-bus distribution system. The effects of distributed power generation and loop network on the system voltage and active power loss are calculated and compared. The results show that the proposed method is simple and convergent, and the effect of distributed power generation and loop network on the node voltage is obvious, among which PV type DG is the most effective for voltage lifting.
【作者单位】：沈阳农业大学信息与电气工程学院;
【基金】：国家科技支撑计划(2012BAJ26B01) 辽宁省自然科学基金(201202191) 辽宁省教育厅科研项目(L2013260)
【分类号】：TM744

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