广域测量系统的延迟分析及其测试

简要介绍了电力系统中基于全球定位系统／相量测量单元的广域测量／监视系统(WAMS)的体系结构，分析了延迟产生的机制并指出了影响实时性的主要因素，提出广域测量系统的延迟评估模型；根据评估模型建立了基于TCP／IP协议广域网络下的WAMS通信延迟测试方法；通过实测获得了基于国家电力数据网(SPDNet)的WAMS的通信延迟特性。根据该延迟评估模型和测试体系，能够有效、合理地进行WAMS的相量测量单元优化选点和通信布局的权衡，并进一步为广域实时动态监测和控制奠定基础。

ANALYSIS AND TEST ON DELAYS IN THE WIDE AREA MEASURING SYSTEM

This paper is concerned with the basic architecture of GPS/PMU-based WAMS and an analysis and test on the delays of synchro-phasors, including its generation mechanism, influencing factors and mathematical model. A delay evaluation model is proposed, for which the authors present an approach to testing the communication delays of WAMS operating on TCP/IP-based WAN. The approach is applied to the recently commissioned Jiangsu Provincial WAMS, which is based on China's State Power Data Network or SPDNet. The characteristics of communication delays of an actual WAMS have been obtained and analyzed. The evaluation model proposed, the testing approach and the field test results can provide basic and important information for optimal placement of PMUs and arrangement of the communication infrastructure of WAMS, laying a solid foundation for wide-area system monitoring and control.