含高比例光伏的配电网分组协调电压控制策略
Distribution network groups with high proportion potovoltaics coordinate voltage control strategies
李圣清 1刘博文 1李焕平 1李欣 1周志飞1
作者信息
- 1. 湖南工业大学 电气与信息工程学院,湖南 株洲 412007;湖南省光伏智能电网控制工程研究中心,湖南株洲 412007
- 折叠
摘要
电压越限成为限制光伏最大接入量的重要因素,为解决大规模光伏并网所导致电压越限问题,文章提出了含高比例光伏的配电网分组协调电压控制策略.首先,根据光伏接入节点对配电网电压灵敏度不同,提出了光伏逆变器分组协调控制思想;然后,光伏逆变器组内以容量利用比和功率因数为一致性变量进行电压控制,组间通过协调控制确保关键节点电压收敛至设定值1.05 p.u.;最后,通过算例仿真验证所提控制策略能有效地抑制配电网电压越限,避免不必要的有功削减,同时在负荷、光伏波动时具有较强的鲁棒性.
Abstract
Voltage violation has become an important factor limiting the maximum integration capacity of photovoltaics.To address the issue of voltage violation caused by large-scale photovoltaic grid connection,the article proposes a grouped coordinated voltage control strategy for distribution networks with high proportions of photovoltaics.Firstly,based on the different voltage sensitivities of photovoltaic connection nodes in the distribution network,the concept of grouped coordinated control for photovoltaic inverters is introduced.Then,within each group of photovoltaic inverters,voltage control is carried out using capacity utilization ratio and power factor as consistent variables,while inter-group coordi-nation control ensures that the voltage at key nodes converges to the set value of 1.05 p.u..Finally,through case simulations,the proposed control strategy is verified to effectively suppress voltage violations in distribution networks,avoid unnecessary active power reduction,and demonstrate strong robustness during load and photovoltaic fluctuations.
关键词
电压越限/光伏并网/分组协调电压控制/一致性变量Key words
voltage violation/photovoltaic power generation/group coordination control/consensus algorithm引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
维普
万方数据