摘要
针对高比例分布式光伏接入配电网引起的电压质量问题,提出一种基于光伏逆变器调节的中低压配电网电压分层协调控制策略。首先分析了中低压有源配电网电压控制方式,提出一种光伏逆变器电压区间分区控制方法;然后,提出了中低压配电网2阶段分层控制架构,构建以网络损耗最小、电压偏差最小和分布式电源消纳最大为目标的优化控制模型;最后,结合IEEE 33节点算例以及某实际配电网算例对有源配电网分层控制策略进行验证。IEEE33节点算例表明,优化方法可使配电网整体损耗降低3.79%,电压偏差率降低27.29%;实际配电网算例结果表明,优化方法可使配电网整体损耗降低36.33%,电压偏差率降低62.59%,并可有效提高光伏消纳平衡能力,保障有源配电网安全稳定运行。
In response to the voltage quality issues caused by the high proportion of distributed photovoltaic integration into the distribution network,this paper proposes a voltage layered coordinated control strategy for medium-and low-voltage distribution networks based on photovoltaic inverter regulation.Firstly,the voltage control methods of active dis-tribution networks were analyzed,and a voltage interval partition control method for photovoltaic inverters was proposed.Then,a dual layer control architecture for medium-and low-voltage distribution networks is constructed,and an opti-mized control model is constructed with the goals of minimizing network losses,voltage deviations,and maximizing distributed power consumption.Finally,the IEEE 33 node example and a practical distribution network example were used to validate the hierarchical control strategy of the active distribution network.The IEEE 33 node example shows that the optimization method can be adopted to reduce the overall loss of the distribution network by 3.79%and the voltage deviation rate by 27.29%.The computation results show that the optimization method can be adopted to reduce the overall loss of the distribution network by 36.33%,reduce the voltage deviation rate by 62.59%,and effectively improve the photovoltaic absorption and balance ability,ensuring the safe and stable operation of the active distribution network.
作者
康田园
刘科研
李昭
KANG Tianyuan;LIU Keyan;LI Zhao(China Electric Power Research Institute,Beijing 100192,China)
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2024年第3期1225-1234,共10页
High Voltage Engineering
基金
国家电网有限公司总部科技项目(计及大规模分布式电源接入的配电网运行机理、互动模型与形态演化研究)(5400-202155464A-0-0-00)。
关键词
配电网
高比例分布式光伏
逆变器调节
电压分区控制
分层协调控制
distribution network
high proportion distributed photovoltaic
inverter regulation
voltage zoning control
layered coordination control
