摘要
泛在电力物联网背景下,智能变电站中负责运行状态上传与控制命令下达的过程层网络负载将急剧升高。传统IEC61850标准协议中的高可用性无缝冗余(High-Availability Seamless Redundancy,HSR)通信链路配置方法由于数据副本在存在环路的网络内循环产生额外流量与额外传输延时,存在信息传输实时性差的缺点。因此,提出基于贪心流量优化算法的过程层网络拓扑高冗余无缝配置方法。首先,在分析采用HSR技术的智能变电站过程层网络工作原理的技术上,提出两种高可用性无缝冗余配置方案:交叉(Cross-Links,CLs)方案与四连通环(Four-Connected Rings,FCRs)方案。其次,为避免过程层网络在流量汇聚时易产生拥塞导致传输时效性变差,提出基于贪心算法的流量调度策略。最后,基于Opnet的变电站仿真算例表明,与传统网络拓扑配置方案相比,所提方案的数据平均传输跳数与传统拓扑方案比下降50%,而采用贪心算法的过程层网络流量调度策略在数据拥塞时的传输延时、丢包率和吞吐量衰退服务分别降低32.7%,63.5%和33.3%。因此,所提方案能够显著提升智能变电站过程层网络性能。
In the ubiquitous electric internet of things,the traffic load of the process-level in smart substations,which is responsible for uploading operation status and issuing control instructions in smart substations,will be increased sharply.High-availability Seamless Redundancy(HSR)topology configuration method in traditional IEC61850 standard protocol has the disadvantage of poor real-time transmission of information due to the extra traffic and corresponding transmission delay caused by data replicas circulating in the rings.Therefore,a seamless configuration method based on greedy traffic optimization scheduling algorithm for process-level network is proposed.Firstly,two kinds of HSR configuration schemes are proposed:Cross-Links(CLs)scheme and Four-Connected Rings(FCRs)scheme.Secondly,in order to avoid congestion in process-level network,which leads to poor transmission timeliness,a traffic scheduling strategy based on greedy algorithm is proposed.Finally,a substation simulation example based on Opnet shows that,compared with the traditional network topology configuration scheme,the average data transmission hops of the proposed scheme are 50%lower than those of the traditional network topology scheme.In addition,the recession of the transmission delay,packet loss rate and throughput of the process-level network using proposed greedy algorithm are reduced by 32.7%,63.5%and 33.3%respectively compared with the traditional scheduling algorithms in congestion situation.Therefore,the proposed scheme can significantly improve the performance of process-level network in smart substation.
作者
黎其浩
岳杨
蒋京辰
张颖
钟加勇
LI Qihao;YUE Yang;JIANG Jingchen;ZHANG Ying;ZHONG Jiayong(State Grid Chongqing Electric Power Company Construction Branch,Chongqing 401121,China;State Grid Chongqing Power Transmission&Transformer Engineering Company,Chongqing 400039,China;State Grid Chongqing Electric Power Research Institute,Chongqing 401121,China)
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2020年第3期106-112,共7页
Power System Protection and Control
基金
国网重庆市电力公司基金项目资助(2019渝电科技40#)
国家重点研发计划资助(2017YFB0902800)“基于微型同步相量测量的智能配电网运行关键技术研究”~~
关键词
智能变电站
过程层网络
无缝冗余拓扑配置
流量调度
贪心算法
smart substation
process-level network
seamless redundancy configuration
traffic scheduling
greedy algorithm
