姜 飞 ,林政阳 ,何桂雄 ,吴朝晖 ,范瑞祥
AuthorsHTML:姜 飞 ¹ ，林政阳 ¹ ，何桂雄 ² ，吴朝晖 ³ ，范瑞祥 ³
AuthorsListE:Jiang Fei,Lin Zhengyang,He Guixiong,Wu Zhaohui,Fan Ruixiang
AuthorsHTMLE:Jiang Fei¹，Lin Zhengyang¹，He Guixiong²，Wu Zhaohui³，Fan Ruixiang³
Unit:1. 长沙理工大学电气与信息工程学院，长沙 410076；
2. 中国电力科学研究院有限公司，北京 100192；
3. 国网江西省电力有限公司，南昌 330096

Unit_EngLish:1. College of Electrical and Information Engineering，Changsha University of Science & Technology， Changsha 410076，China；
2. China Electric Power Research Institute，Beijing 100192，China；
3. State Grid Jiangxi Electric Power Co.，Ltd.，Nanchang 330096，China

Abstract_Chinese:构建含高比例新能源发电的新型绿色电网已成为实现双碳目标的主要导向，以光伏(PV)为代表的新能源发 电也正处于快速发展阶段．分布式光伏的大规模接入改变了传统低压配电网单向潮流模式，使得潮流预测难度增 大，容易导致光伏并网点电压越限．针对这种非常规潮流带来的电压越限问题，提出了一种基于动态一致性算法的 光伏-储能分布式协调电压控制策略．首先分析了含分布式光伏低压配电网的电压越限原理，考虑了光伏逆变器与储 能系统(ESS)的功率调节特性，建立了光伏-储能的分布式控制模型；然后选取光伏逆变器无功利用率与储能荷电状 态(SOC)变化量为一致性变量，通过动态一致性算法实现了光伏逆变器无功功率与储能系统有功功率的协调控制； 最后通过含分布式光伏与储能的 8 节点 220 V 低压配电网络进行算例验证．结果表明所提策略避免了单一环节控制 带来的调节局限性问题；与传统集中式电压控制方法相比，所提策略将不同用户间电压控制所需的无功功率与有功 功率按容量比例进行了分配，将低压配电网稳压负担平均地分配给了用户，满足了网络用户群体的利益一致性；同 时在不同天气情况下，所提策略控制后最高平均电压与最低平均电压分别为 1.068 与 0.911，有效抑制了电压越限 问题．
Abstract_English:Building a novel green grid with a high power generation capacity has become the main guide for achieving the “dual-carbon goal”，and new energy power generation using photovoltaics(PVs)is also in a stage of rapid development. The large-scale integration of distributed PVs has changed the unidirectional power-flow model of the traditional low-voltage distribution network，making power-flow prediction more difficult and easily causing the voltage of the PV grid-connected points to exceed the limit. Addressing the voltage overrun problem caused by the unconventional power-flow model，this paper proposes a coordinated voltage-control strategy for the distributed PV energy storage systems(ESSs)，based on a dynamic consensus algorithm. Firstly，the voltage overrun of a low\u0002voltage distribution network containing distributed PVs is analyzed. Secondly，the power-regulation characteristics of the PV inverter and ESS are considered，and a PV energy storage distributed control model is established. Then，thereactive power-utilization rate for the PV inverter and change in the energy storage state of charge(SOC) were se\u0002lected as the consistency variables. Subsequently，coordinated control of the PV inverter reactive and active powers of the ESS was realized through the dynamic consistency algorithm. Finally，an 8-node 220 V low-voltage power distribution network with distributed PVs was passed，followed by the verification of the energy storage by calcula\u0002tion examples. The results show that the proposed strategy avoids the voltage limitation problem caused by the singlelink control. Compared with the traditional centralized voltage-control method，the proposed strategy performs the reactive and active powers required for voltage control among different users in proportion to the capacity. The burden of voltage stabilization of the low-voltage distribution network is evenly distributed among the users，which meets the interests of the network user group. At the same time，in different weather conditions，the highest and lowest average voltages after the proposed strategy are 1.068 and 0.911，respectively，thus，suppressing the voltage overrun problem effectively.
Keyword_Chinese:低压配电网；光伏；储能系统；电压越限
Keywords_English:low-voltage distribution network；photovoltaic；energy storage system；voltage overrun

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