【作者】 胡正欢；

【导师】 杜树新；

【作者基本信息】 浙江大学 ， 模式识别与智能系统， 2007， 硕士

【摘要】 电能质量监测是进行电能质量监控的关键环节，是发现电能质量问题的前提条件。建立功能强大的电能质量监测管理系统，不仅能详细地记录电网运行过程中的历史电能质量指标，而且还能对相关的线路进行实时监控，进而分析电能质量问题的原因，为改善和提高电网供电质量提供有力的数据支持。本论文着重于电能质量监测管理系统平台软件的研究和搭建，开发了一套基于J2EE技术框架的电能质量监测管理系统软件。针对电能质量监测系统中数据监测点众多、网络通信负载大、负载不均衡，以及系统数据库容量庞大的特点，本论文对大型数据采集、管理、服务软件系统的设计和具体实现进行了研究，主要创新点为：1．提出了电能质量监测管理系统的四层混合结构软件模型，通过应用服务器的混合设计，提高了系统的数据响应性能；软件采用多层设计的思想实现了数据、业务、显示的分离，降低了系统软件结构的耦合性，保证了数据的安全性。2．结合数据库和计算机的工作模式，设计了数据库的逻辑和物理结构，提出临时数据缓存表和历史数据表结合的工作方式共同完成动态电能质量运行数据的存储和管理。通过使用索引和分区技术，规划数据库的表空间和数据文件，解决了数据采集过程中数据存储速度慢、性能不稳定以及数据统计时系统响应慢的问题。3．设计主从通信服务器工作模式，解决了大型数据采集系统中单机数据处理能力弱的问题，扩展了系统的通信和数据处理能力；同时主从通信工作模式配置灵活，通信系统维护简单。本系统已在上海市区供电公司应用，目前系统监测点在5000个以上。更多还原

【Abstract】 Power quality monitoring is a key part for the control of power quality, and is alsoa necessary condition to find power quality problems. The establishing of powerquality monitoring and management system (PQMMS) can not only get the historydata of power quality’s parameter during the running of power system in detail, butalso monitor key power lines in real-time mode. Based on PQMMS, power qualityproblems is analyzed, and decision-support for improving the power quality of powergrid is provided. This thesis concerned the research and design of PQMMS s softwareplatform, and developed the power quality monitoring and management systemsoftware based on J2EE technology framework.This thesis researches the design and concrete realization of the software systemwhich provides services for the system with large network communication load, loadimbalance, and large capacity database system. The thesis’s main innovations are asfollows:1. A mixed four-tier structure of software model for PQMMS was presented, wherethe application server’s hybrid design enhances system’s performance well.Meanwhile multiple design idea in software achieved the separation of data, businessand display well, and reduced the coupling among software and ensures the securityof data.2. Considering the work mode of database and computer, the thesis redesigned thedatabase’s logical and physical structure. By using data cache table and data historicaltable in dynamic power quality running data’s storage and management, unstableperformance and slow response of the database system with large capacity weresolved.3. The mode of main and sub ordinary communication server’s design expanded thesystem’s capability of communication and data processing, which solved the weak ofstandalone data-processing capabilities in large data collection system. The mode ofcommunication system was flexible, the communication system’s maintenance wassample.The system has been running in shanghai power. The number of system’smonitoring device has been over 5,000.更多还原