基于协调控制SVG的低压配网三相负荷不平衡治理技术

发布时间：2018-10-13 10:33

【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。
[Abstract]:The compensation effect of centralized static Var Generator (SVG) compensation system is single and the compensation capacity of distributed SVG compensation system without communication function can not be allocated intelligently. A three-phase unbalanced load compensation system for low voltage distribution network based on coordinated control SVG is proposed. The compensation system introduces the communication bus and adopts the coordinated control method to make the SVG connected downstream of the low voltage line utilize the residual capacity after compensating its downstream unbalanced current and compensate the insufficient capacity of the upstream SVG in turn. The reverse power flow can further reduce the low voltage problem of each node. The compensation system can not only make full use of the compensation capacity of each SVG, but also solve the problems of unbalanced current of distribution transformer and low voltage of the node. The compensation effect of the compensation system is simulated under the Matlab/Simulink digital simulation software, and the accuracy of the compensation system is proved. The unbalance current of secondary side and voltage drop of each node in the distribution transformer of low voltage distribution network with four different compensation systems are compared under four different load conditions. The results show that the compensation system is the best.
【作者单位】：广东电网有限责任公司惠州供电局;中国科学院广州能源研究所;
【基金】：广东省自然科学基金(2014A030310191) 广东省省级科技计划(2014B040404002)资助项目
【分类号】：TM761.12

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