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基于协调控制SVG的低压配网三相负荷不平衡治理技术
Alternative TitleThe Control Technology of Three-Phase Unbalance Load in Low Voltage Distribution Networks Based on Coordinated Controlled SVGs
邓惠华1; 李国良1; 周晓明1; 李汉荣1; 王浩2
2017-07
Source Publication电工技术学报
ISSN1000-6753
Volume32Issue:S1Pages:75-83
Abstract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。
Other AbstractConcentralized static var generator(SVG)compensation system has single compen-sation effect and distributed SVG compensation system without communication function can notdistribute SVG’s compensation capacities intelligently.Aiming at these problems,a compensationsystem based on SVGs’coordinated control strategy was proposed for three-phase unbalance load inlow voltage distribution network.Communication bus and coordinated control strategy are introducedin the proposed system.After compensating the downstream unbalance current,the residual capacity ofthe downstream SVG is used to compensate the upstream SVGs in sequence.The low voltage problemof each node is further reduced by the reverse power flows from the downstream SVG to the upstreamSVG.And then SVG’s capacity in the proposed compensation system can be fully used.Meanwhile,theproblems of the distribution transformer’s unbalance current and the node’s low voltage aresynthetically solved.Simulations for actual effect evaluation of the proposed compensation systemwere done in Matlab/Simulink.Validity of the proposed system is confirmed by the simulation.In fourdifferent load cases,four different compensation systems were applied in low voltage distribution station,respectively.Unbalance currents of distribution transformer secondary and node voltage dropsin these cases were compared.Comparison results show that proposed compensation system has thebest compensation effect.
Keyword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 Low voltage distribution networks three-phase load unbalance distribution transformer operation coordinated control static var generator (SVG) power quality
DOI10.19595/j.cnki.1000-6753.tces.L70726
Language中文
Citation statistics
Document Type期刊论文
Identifierhttp://ir.giec.ac.cn/handle/344007/16598
Collection中国科学院广州能源研究所
Corresponding Author王浩
Affiliation1.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
Recommended Citation
GB/T 7714
邓惠华,李国良,周晓明,等. 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(S1):75-83.
APA 邓惠华,李国良,周晓明,李汉荣,&王浩.(2017).基于协调控制SVG的低压配网三相负荷不平衡治理技术.电工技术学报,32(S1),75-83.
MLA 邓惠华,et al."基于协调控制SVG的低压配网三相负荷不平衡治理技术".电工技术学报 32.S1(2017):75-83.
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