电工技术学报  2017, Vol. 32 Issue (增刊1): 75-83    DOI: 10.19595/j.cnki.1000-6753.tces.L70726
电力系统及其自动化 |
基于协调控制SVG的低压配网三相负荷不平衡治理技术
邓惠华1, 李国良1, 周晓明1, 李汉荣1, 王浩2
1. 广东电网有限责任公司惠州供电局 惠州 516001;
2. 中国科学院广州能源研究所 广州 510640
The Control Technology of Three-Phase Unbalance Load in Low Voltage Distribution Networks Based on Coordinated Controlled SVGs
Deng Huihua1, Li Guoliang1, Zhou Xiaoming1, Li Hanrong1, Wang Hao2
1. Huizhou Power Supply Bureau of Guangdong Power Grid Co., Ltd Huizhou 516001 China;
2. Guangzhou Institute of Energy Conversion Chinese Academy of Sciences Guangzhou 510640 China
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摘要 针对集中式静止无功发生器(SVG)补偿系统补偿效果单一、不含通信功能的分布式SVG补偿系统补偿容量不能智能分配的问题,提出基于协调控制SVG的低压配网三相负荷不平衡补偿系统。该补偿系统引入通信总线,采用协调控制方法,使低压线路下游接入的SVG可利用补偿其下游不平衡电流后的剩余容量,依次对上游SVG不足容量进行补偿,该补偿形成的逆向潮流可进一步减轻各节点的低电压问题。该补偿系统既可以充分利用各SVG的补偿容量,同时也综合地解决了配电变压器电流不平衡、节点低电压等问题。在Matlab/Simulink数字仿真软件下进行了该补偿系统补偿效果的仿真,结果证明了该补偿系统的准确性。在四种不同负荷情况下比较采用四种不同补偿系统的低压配网配电变压器二次侧不平衡电流和各节点电压降,结果表明该补偿系统的效果最佳。
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邓惠华
李国良
周晓明
李汉荣
王浩
关键词 低压配网三相负荷不平衡配电变压器运行协调控制静止无功发生器电能质量    
Abstract:Concentralized static var generator (SVG) compensation system has single compen -sation effect and distributed SVG compensation system without communication function can not distribute SVG's compensation capacities intelligently. Aiming at these problems, a compensation system based on SVGs' coordinated control strategy was proposed for three-phase unbalance load in low voltage distribution network. Communication bus and coordinated control strategy are introduced in the proposed system. After compensating the downstream unbalance current, the residual capacity of the downstream SVG is used to compensate the upstream SVGs in sequence. The low voltage problem of each node is further reduced by the reverse power flows from the downstream SVG to the upstream SVG. And then SVG's capacity in the proposed compensation system can be fully used. Meanwhile, the problems of the distribution transformer's unbalance current and the node's low voltage are synthetically solved. Simulations for actual effect evaluation of the proposed compensation system were done in Matlab/Simulink. Validity of the proposed system is confirmed by the simulation. In four different load cases, four different compensation systems were applied in low voltage distribution station, respectively. Unbalance currents of distribution transformer secondary and node voltage drops in these cases were compared. Comparison results show that proposed compensation system has the best compensation effect.
Key wordsLow voltage distribution networks    three-phase load unbalance    distribution transformer operation    coordinated control    static var generator (SVG)    power quality   
收稿日期: 2016-08-12      出版日期: 2017-09-14
PACS: TM761  
基金资助:广东省自然科学基金(2014A030310191)和广东省省级科技计划(2014B040404002)资助项目
通讯作者: 王 浩 男,1976年生,博士,助理研究员,研究方向为配网电能质量分析与控制。E-mail: whhao1@163.com   
作者简介: 邓惠华 男,1976年生,本科,工程师,现主要从事电网生产设备技术管理工作。E-mail: dna93830 @163.com
引用本文:   
邓惠华, 李国良, 周晓明, 李汉荣, 王浩. 基于协调控制SVG的低压配网三相负荷不平衡治理技术[J]. 电工技术学报, 2017, 32(增刊1): 75-83. Deng Huihua, Li Guoliang, Zhou Xiaoming, Li Hanrong, Wang Hao. The Control Technology of Three-Phase Unbalance Load in Low Voltage Distribution Networks Based on Coordinated Controlled SVGs. Transactions of China Electrotechnical Society, 2017, 32(增刊1): 75-83.
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