WAMS通信业务的系统有效性建模与仿真

Modeling and Simulation on Effectiveness of Communication Services Systems in WAMS

广域测量系统(wide area measurement system,WAMS)作为现代电力系统及未来智能电网的重要组成部分,其自身的可靠性至关重要,而WAMS通信业务的有效性直接影响着系统功能的实现。参照现有WAMS通信网的结构,建立了以子站相量测量单元(phasor measurement unit,PMU)通信模块、区域通信网、区域相量数据集中器(phasor data center,PDC)、骨干通信网为组件的WAMS通信网物理模型;借鉴基于全网业务性能平均值的通信网可靠性测度的研究理论,提出了融合网络通道、传输时延和数据可靠性3个特性指标的单一业务有效性的逻辑模型;根据WAMS数据业务的应用需求和汇集型通信的特点,基于可靠性串联模型给出了同一时标下所有通信业务同时有效的系统有效性指标及其计算公式;探讨了基于系统有效性的元件重要度的分析方法。对IEEE 14节点WAMS系统进行蒙特卡罗仿真,得出了该系统通信业务的系统有效性和系统元件重要度排序。

The reliability of wide area measurement system （WAMS） plays a vital role as it serves as an important part of modem power system and smart grid, the effectiveness of communication services in WAMS has a direct impact on its own system functions. Referring to the existing communication network structure in WAMS, this paper established a physical model of WAMS communication network including four components of PMU＇s communication module in sub-station, regional communication network, regional phasor data center （PDC） and backbone communication network. According tothe theory o~ cornItlUllli^tlOIl lI^gWUll~, l＊axlovxLl^j based on the average of the whole network services performance, it proposed a logic modal of a single service effectiveness integrating three feature indices （network channel, transmission delay and data reliability）. And according to the application requirements of WAMS data services and the characteristics of collection-type communication, it gave out system effectiveness indices and calculation formula based on reliability series model. It studied the analysis method of system element importance about system effectiveness in WAMS communication. By Monte Carlo simulation, the system effectiveness of communication services and sorting order of system elements importance was obtained on the IEEE 14 nodes system of WAMS.