配电网中基于网络分区的高比例分布式光伏集群电压控制

发布时间：2018-12-16 10:17

【摘要】：随着高比例分布式光伏的接入,配电网的过电压问题愈发严重,传统对所有光伏进行集中式电压控制的方法变得过于复杂,难以满足控制时间尺度的要求。文中提出了一种改进的模块度函数分区算法,结合无功/有功平衡度指标与区内节点耦合度指标,自动形成最佳分区,对含高比例分布式光伏的配电网进行无功与有功两个层面的光伏集群控制。在分区基础上,针对光伏逆变器有功与无功的控制能力,采用先无功后有功的电压控制策略,在子分区内部通过对关键光伏节点的控制来调节关键负荷节点的电压,有效地缩小对可控光伏的搜索范围,减少控制节点数目,加快控制响应时间,适合未来高比例分布式光伏接入配电网的电压控制。最后,以某一10kV实际馈线系统为例,验证所提方法的有效性。
[Abstract]:With the access of high proportion of distributed photovoltaic, the problem of overvoltage in distribution network becomes more and more serious. The traditional method of centralized voltage control for all photovoltaics becomes too complicated to meet the requirements of control time scale. In this paper, an improved modular degree function partition algorithm is proposed, which combines the reactive power / active power balance index with the coupling degree index of the nodes in the area, and automatically forms the best partition. The distribution network with high proportion of distributed photovoltaic is controlled by both reactive power and active power. According to the active and reactive power control ability of photovoltaic inverter, the voltage control strategy of reactive power first and then active power is adopted to adjust the voltage of critical load node by controlling the key photovoltaic node in the sub-area. It can effectively reduce the search range of controllable photovoltaic, reduce the number of control nodes and speed up the control response time, which is suitable for the voltage control of distribution network with high proportion of distributed photovoltaics in the future. Finally, an example of a 10kV feeder system is given to verify the effectiveness of the proposed method.
【作者单位】：合肥工业大学电气与自动化工程学院;国网浙江省电力公司电力科学研究院;
【基金】：国家电网公司科技项目(5211DS150015)~~
【分类号】：TM615;TM714.2

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