摘要
电压是电能质量的重要指标,电压质量的好坏影响着电网的安全经济运行,用户安全生产、产品质量及电器设备的安全与寿命。电压无功控制系统对于提高电压质量,降低电网的有功损耗有着重要的意义。
本文讨论的电压无功集中控制系统在控制策略上对传统的九区图控制方案进行了改进,采用反时限面积和模糊控制边界的控制方法有效地控制了均匀投切并避免了投切振荡,在调度中心对多个变电站进行集中控制。在系统图形监控方面对电网建模、电网图元结构设计、电网结构分析及其软件实现方面进行了详细的分析和研究,采用电网图元端子结构单向记忆的设计方法实现了电网监控节点模型建立和实时带电分析以及变电站内部变压器运行方式的判断,相对于单片机控制的vqc装置更能够适应复杂的接线方式。结合电力系统CDT规约对本系统中相关通信控制规约进行了分析,提出了本系统与现有SCADA系统的配置方案,对图形监控程序和通信前置机服务程序的设计进行了详细的设计和分析,对本系统所采用的实时数据库进行了分析和结构设计。
Voltage is one of the important target in improving the quality of electric energy, in ensuring the running of power network with security and economy, in ensuring the security of production and electric equipments. The voltage and reactive power control system can improve voltage quality and reduce the active power loss.
An “anti_deadline area” method and “fuzzy inference” is presented in this paper based on the improvement of the conventional “nine_area control strategy” and the action of the equipment is effectually controlled. Transformer substations are controlled in this centralized system. The research of supervisory and control in this system ,including the modeling of power network ,the design for the structure of electric element ,the analysis for the structure of power network ,and the realization in software are described in this paper. Elements of power network in the supervisory and control system interact with each other by use of the “site structure” ,electrification of the elements and the modeling for node analysis and the analysis for the running mode of the transformers are realized. It is adapt to complex power network model. The protocol of communication between this system is set down according to the CDT protocol .A scheme of compatible between SCADA system and this system and program structure for supervisory and communication is discussed and the design of the real time database used in this system is described in this paper.
引文
王士政 “电网调度自动化与配电自动化技术” 中国水利水电出版社
王兆安 “谐波抑制和无功功率补偿” 机械工业出版社
洪永清,黄德才,吕丽民,“面向对象建模与设计”,人民邮电出版社
刘润东,“UML对象设计与编程”,北京希望电子出版社
候俊杰,“深入浅出MFC”,华中科技大学出版社
刘志超 ,陈宏钟,张伟,承文新 “基于专家系统的变电站电压无功控制装置”,电力系统自动化,2003,Vol 27 ,No 2
李国徽,刘云生 “实时数据库并发控制”,小型微型计算机系统,2001,Vol 22,No 12
黄梅,龚强,何希芬 “利用SCADA 系统实时数据库进行电网无功优化控制”,电力系统自动化,1998,Vol 22,No 8
刘源祺,张航 “地区电网无功优化规划”山东工业大学学报,Vol 30 No 5
姚诸香,李庆庆,郭玉金 “带惩罚的无功优化潮流模型与算法” 电力系统及其自动化学报,1998,Vol 10,No 3
庄侃沁,李兴源 “变电站电压无功控制策略和实现方式” 电力系统自动化,2001年8月10日
钱源平,韩晓言 “循环远动主站前置处理系统性能分析” 浙江大学学报,Vol 32 No 4
Bruce, A.G. “Reliability analysis of electric utility SCADA systems”Power Industry Computer Applications., 1997. 20th International Conference on , 11-16 May 1997
Wollenberg, B.F.“Transmission system reactive power compensation” ;Power Engineering Society Winter Meeting, 2002. IEEE , Volume: 1 , 27-31 Jan. 2002
Burt, G.M.; McDonald, J.R.; Spiller, J.; Brooke, D.; Samwell, R.; “A realtime decision support system for the operation of a 132 kV power network“ Advances in Power System Control, Operation and Management, 1993. APSCOM-93., 2nd International Conference on , 7-10 Dec 1993
Scheduling transactions with temporal constraints: exploiting data semantics Ming Xiong; Ramamritham, K.; Stankovic, J.A.; Towsley, D.;
Sivasankaran, R.; Knowledge and Data Engineering, IEEE Transactions on , Volume: 14 , Issue: 5 , Sept.-Oct. 2002
Fangxing Li .A Software Framework for Advanced Power System Analysis ;Case Studies in Networks,Distributed Generation ,and Distributed Computation
[Fayad-Hamu:97]Mohamed E.Fayad and David S.Hamu“Objiect-Oriented Enterprise Frameworks ; Make vs. Buy Decisions and Guidelines for Selection ”,The Communictions of ACM ,1997 ,to appear.
[Gamma:95] Herman Hueni and Ralph Johnson and Robert Engel ,“A Framework for Network Protocol Software,” Proceeding of OOPSLA.Austin ,Texas ,October 1995
[Schmidt;97] Douglas C. Schmidt ,”Applying Design Patterns and Frameworks to Develop Object-Oriented Communication Software,” Handbook of Programming Languages . Volume 1 ,edited by Peter Salus, MacMilllan Computer Publishing ,1997.