摘要
电力系统动态监测与实时决策系统对广域测量数据的实时性提出了很高的要求。文中分析了相量数据集中器(PDC)同步算法的特点和广域通信网时延的机理,建立了广域测量系统(WAMS)通信时延的计算模型;研究了同步数字体系(SDH)网络故障对实时通信的影响,以二纤双向复用段保护为例建立了保护倒换时间计算模型,分析了倒换过程中数据丢包数与倒换时间的关系,讨论了保护路径时延增加对WAMS整体通信时延的影响,并提出了相应的应对策略。实际系统的测试结果验证了所建模型的正确性。该研究成果对后期工程WAMS业务网的组建、相量测量单元(PMU)优化配置及PDC优化选点等有一定的参考价值。
Dynamic monitoring and real-time decision-making system have high demand on the real-time property for wide-area measurements.Synchronization algorithm characteristics of phasor data concentrator and delay mechanism of wide-area communication network are analyzed,and a communication delay calculation model for wide area measurement system（WAMS） is proposed.The influence of SDH network＇s fault on real-time communication is studied.The two-fiber bidirectional multiplex section protection ring is used as an example to analyze the relationship between data loss and switching time length.The effect of increasing protection path delay on the overall communication delay of WAMS,and the corresponding countermeasures are given.The test results on practical system verify the correctness of the developed model.The research provides certain references for WAMS service network construction,optimized PMU configuration and PDC optimal placement. This work is supported by National Natural Science Foundation of China（No.50877026）.
出处
《电力系统自动化》
EI
CSCD
北大核心
2011年第21期68-73,共6页
Automation of Electric Power Systems
基金
国家自然科学基金资助项目(50877026)~~
关键词
广域测量系统
通信时延
等待时限
网络保护
倒换时间
wide area measurement system（WAMS）
communication delay
waiting time
network protection
switching time
