考虑通信中断的有源配电网电压控制方法

Active Distribution Network Voltage Control Method Considering Communication Interruption

有源配电网中大规模分布式电源的接入可能会使得某些负荷节点的电压偏差超出允许范围,出现电压越限,因此同时对多个节点进行电压控制的必要性十分突出。随着配电网对信息通信系统产生越来越强的依赖性,电压控制过程也面临着通信故障和通信攻击的威胁,可能导致电压控制不但无法起到改善作用,反而会进一步恶化电压质量。针对这一问题,文章提出了一种通信中断后基于正常节点与物理层固定已知信息的多维信息特征的Q-V下垂控制方法,能够针对电压越限节点做出更加精细的控制效果,同时一定程度上抵御通信中断对调压过程的影响。首先基于单节点的Q-V下垂控制推导出多节点Q-V下垂控制的统一模型;其次分析了通信中断对所提模型的影响以及抵御其影响的方法,并对所提模型进行了相应改进;最后基于配电网CPS仿真平台,在IEEE33节点模型上验证了所提模型的正确性。

The access of large-scale distributed generation in the active distribution network may cause the fluctuation of some load nodes to exceed the allowable range,so the necessity of voltage control for multiple nodes at the same time is very prominent.As the distribution network becomes more and more dependent on the information and communication system,the voltage regulation process is also facing the threat of communication failures and cyber attacks,which may cause the voltage regulation process to not only fail to improve,but to further deteriorate the voltage quality.In response to this problem,this paper proposes a Q-V droop control method based on the multi-dimensional information characteristics of the normal node and the fixed known information of the physical layer after the communication is interrupted,which can make a more precise control effect for the voltage limit node,and at the same time,to a certain extent,it resists the influence of communication interruption on the voltage regulation process.Firstly,a unified model of multi-node Q-V droop control is derived based on single-node Q-V droop control.Secondly,the influence of communication interruption on the proposed model and the methods to resist its influence are analyzed,and the proposed model is improved accordingly.Finally,based on The CPS simulation platform of the distribution network,this paper verifies the correctness of the proposed model on the IEEE33 node model.