【作者】 赵丽平；

【导师】 李群湛； 陈小川；

【作者基本信息】 西南交通大学 ， 电力系统及其自动化， 2006， 博士

【摘要】 电能作为各行各业的基本动力能源，其质量问题受到广泛的重视。本文在深入研究电能质量问题本质的基础上，基于小波理论，采用Agent技术和数字信号处理技术，对电能质量监控和分析的理论与实践进行了较为全面的研究，通过仿真和实际系统的构建完成了与之相关的研究。 针对电能质量监测的发展趋势和协调控制中存在的问题和需求，提出了一种基于智能Agent技术的开放、主动远程电能质量监控系统结构模型。这种结构具有开放、主动性和灵活性，符合电网分布式的结构特点和电力市场发展的需求，能够满足电能质量监控系统的要求。 论文针对电能质量稳态指标和暂态指标的特点和现场的需求，提出了FFT与小波变换相结合的PQ_Agent检测算法。该方法可以同时兼顾对电能质量稳态指标和暂态指标的检测，可以在线地将扰动提取出来，较好地反映系统中电能质量的状况，具有很强的实时性。 深入分析了异构环境下电能质量信息共享平台的特性、目标和功能，提出了适合远程电能质量监测所需要的、基于信息共享的多Agent模型及其实现体系结构。 针对目前数据库资源异构性、多样性和自治性等特点，提出了“数据包装器”的概念，构建了一种异构数据源集成系统模型，并讨论了基于此模型的信息访问模式和访问流程。最后讨论了系统实现中的数据集成策略，实现框架及相关的主要技术。 建立了基于BDI模型的监控Agent、协调Agent和管理Agent；深入研究了Agent各功能模块的实现，讨论了多Agent系统的建立方案、运行机制及协调和协商机制，并对紧急情况下的多Agent系统控制策略进行了研究和仿真，提出了2级自治的实现。使系统具有较高的适应性、灵活性和智能性。 通过对西昌电网的仿真和分析得出：采用基于Agent的电能质量监控系统，可以很好地对电能质量的暂态和稳态指标进行控制，特别是通过各电能质量调节器之间的相互协作，可改善电网质量，提高经济效益。 基于上述理论，研究了基于多Agent电能质量监控系统的开发方法，采用面向对象的VC++作为系统软件开发的主体平台，采用基于DSP的高精度数据采集系统和数据库前后台的管理方式。由于在系统中采用了Agent技术，更多还原

【Abstract】 Electric energy is the broadest used energy in modern society, and its quality problems are paid great attention to by customers. This paper begins with an in-depth analysis of power quality problems, followed by an overall theoretical and expeimental study on the power quality (PQ) monitring and control using wavelet theory, agent technology and digital signal processing technique. Then some simulations are performed to validate the built system.In view of the developing trends for PQ monitoring and the existing questions and demands for PQ collaborative control, proposed an open, active system architecture for long-distance PQ monitoring and control based on the multi-agent technology. The open, active and flexible characteristics of the architecture satisfy the structure requirement of the distributed power network. It meets the demands for electric power market, and the needs for PQ monitoring and control system.According to the characteristics of the steady indexes and transient indexes of PQ and the spot requirement, a hybrid algorighm combining fast Fourier transform (FFT) and wavelet transform is proposed for PQ_agent detection. By this method, the information about cyclical disturbance signals is obtained through FFT, and the information about instantaneous disturbance signals is obtained through small scales decomposition of wavelet transform. The accurately detected disturbance information can reflect the PQ status of the system effectively, and on-line PQ monitoring is relized.Moreover, on the basis of analyzing the characteristics, objectives and functions of PQ information sharing in a long-distance PQ monitoring and control isomeric environment, multi-agent information sharing model and its implementation framework are established, which meet the requirements of tele PQ monitoring.The concept of "data wrapper" is provided to build a heterogeneous data resources integration model, which can accommodate to the heterogeneous, disperse, autonomous data sources. Then the information access mode and flow are discussed based on the model, and the data integration strategy, the model更多还原