摘要
本文对基于电力线载波通信技术的大型,多用户应用系统进行了分析和研究,运用系统化、层次化、模块化的总体设计思想,研制了基于中压电力线载波通信技术的供用电在线监测系统,系统按逻辑划分为数据库子系统,数据采集子系统,客户端服务软件,系统配置模块和系统维护模块五大部分,经实际运行验证,该系统具性能稳定、使用方便、适应性和扩展性强的优点。
由于电力线载波通信网络具有时变性,系统需要具有为通讯节点自动生成路由的能力,本文提出了基于图论和层序遍历的自动软件中继方法,以解决时变信道信号远距离传输问题,从而提高了数据采集系统的鲁棒性。
设计了基于多线程技术的数据采集子系统,分析了系统容量产生上限的原因,并提出了两种提高采集系统容量的方法;数据采集子系统运用多级循环队列时间片轮转策略来提高监测任务的实时性。开发的客户端软件,界面美观、操作简单、易学易用,满足了用户进行数据查询、分析、统计、计算和在线监测的需要;开发的系统配置模块和系统维护模块,赋予了用户对供用电在线监测系统进行定制、扩充、升级的能力。
考虑到用户的需求和项目后续开发的需要,系统必须具有适应多种数据库的能力,为此本文研究了与具体数据库无关的多数据库存取技术,以解决系统对数据库的适应性问题。
本文设计的基于中压电力线载波技术的供用电在线监测管理系统,实现了对电能数据的远距离自动抄收、电量统计、计费、盗窃电分析、线损计算、在线监测用电情况等多项功能,满足了供电公司的需求,大大提高了供用电管理的自动化水平,发挥了较大的社会效益,具有广阔的推广应用前景。
After a review of the large-scale, multi-user application system which based on power line carrier communication technology, this paper proposed an on-line-monitoring power supply and consuming management system guided by the general principle of being systematic, multi layers and modeling. The system included five parts: database subsystem, data-acquisition subsystem, client-side service software, system configuration module and system maintenance module.
Because the power line communication has the feature of varying with the time, the system should be capable of generating routs for all nodes in power line communication network. Thus, a software relay arithmetic based on sequence and all possible nodes was suggested to solve the problem of distance transmission of the time-varied signals, so as to enhance the robustness of the data-acquisition subsystem.
The data-acquisition subsystem was developed using the multi-thread technology. After analyzing the causes of its upper limit capacity, two methods were put forward to improve the capacity of the data-acquisition system. The real-time response performance of the subsystem is improved with the multilevel circular queue based on time-cycled strategy. Client-side software was developed, with beautiful user interface, convenient and easily learned operations, providing functions like querying, analysis, statistic, computing, on-line monitoring and so on, to satisfy the users’need. The Development of the system configuration module and maintenance module make it possible for the users to customize, update, extend the system.
The on-line-monitoring power supply and consumption management system can be used to read distance meter and store data automatically, doing the counting, analyzing, computing and monitoring the electricity use status on line. It can meet the demand of the power-supply corporations, enhance the automatization level of electricity management greatly. The system indicates a good prospect of wide application in the future.
引文
1冯庆东.配电网自动化发展需要新技术.电工技术杂志. 2004年第7期:16~17
2黄益庄.变电站综合自动化技术.中国电力出版. 2000
3叶世勋.现代电网控制与信息化.中国水利水电出版社. 2005
4徐纪法.城市中低压配电网及其发展理念.中国电力. 2001.12:40~42
5张华美, C. Zhou.面向电力市场的配电管理信息系统设计.电力系统自动. 2000.11:56~58
6沈金清.县级配网自动化与配电管理系统的建设思路.供用电. 2004年第四期:36~37
7郭强,何龙.北京城区配电自动化实施方案.电力需求侧管理. 2004年第五期:38~40
8龙子庄.电力载波远程抄表系统的研究和设计.中国科学院硕十学位论文. 2001. 6
9林丛.低压电力线载波自动抄表系统.福州人学硕十论文. 2003
10何鸣,陈清萍,王厚文.电费回收动态管理系统的设计与实现.电力信息. 2004年第二期:54~56
11徐国平.农村配电变压器台区监测系统建设及其功能实现.电力需求侧管理. 2004年第五期:28~30
12侯丽华,蒋彬.配电自动化的多种通信方式.长春工程学院学报(自然科学版). 2000, 1:54~55
13潘克修.远程自动抄表系统及其通信方式.军事通信技术. 2001.9:40~43
14陈正石.扩频技术在电力线载波通信中的应用分析.电力系统通信. 1998 (1).10~ 13
15鄢菁,殷小贡.基于OFDM调制技术的配电自动化通信系统.电子设计与应用. 2004,4:29~30
16汪晓岩,樊昊等.基于OFDM技术的电力线通信系统的MATLAB模拟.电力线通通信. 2002年第2期. 2~6
17王钢,刘毅鹏. BPSK载波同步技术的研究.通信技术. 2003年第1期: 21
18程民利,夏一羽等.一种改进的BPSK载波同步方法的研究. 2004年11月第28卷第11期:62~64
19 Overbye T J. Visualing the electric grid for power management and marketing Electric Light &Power 2002(10)
20王宏亮.基于中压电力线载波的通信技术研究.哈尔滨工业大学硕士论文. 2006
21郭静波,王赞基.配电网电力线通信研究与应用现状[C].中国电机工程学会.电力通信专委会第三届学术会议论文集.1998:96~99
22配电网自动化通信技术.广东电力. 2003,16(3):26~29
23电力线载波通信技术分析.制造业信息化. 2005,3 (2):32~34
24汤效军.电力线载波通信技术的发展及特点.电力系统通信. 2003(1),47~52
25 Yang Qixun. Distribution International Conference on Automation and Its Realization in China Electricity Distribution, Shanghai, 2000
26王晖,佘京兆. l0kV电力线载波通信结合滤波器的改进方案.华北电力技术. 2001,(2):19~20
27蔡世龙,汪晓岩,刘胤龙,孙荣久,易浩勇,王忠杰.中压配电线传输特性的测量与研究.电力系统通信. 2004, 4:11~15
28李根旺,赵富海.信号在电力线上传输应用中特性的研究.现代电子技术. 2005,9(200):30~32
29李荣伟,吴乐. 10kV中压配电线载波信道的建模.电路与系统学报. 2006年12月12卷第6期:19~23
30 H.Philips. Modeling of Powerline Communication Channels. In proc. 3rd Int. Symp. Power-Line Communications and its Applications(ISPLC 99), Mar. 1999:45~51
31 M. Zimmermann and K. Dostert. A Multi-Path Signal Propagation Model for the Power Line Channel in the High Frequency Range. In Proc. 3rd Int. Symp. Power-Line Communications and its Applications(ISPLC 99), Mar. 1999:45~51
32易浩勇,汪晓岩,孙荣久.中压配电网载波通信的多径反射模型研究.电力系统通信.2004,(1):21~24
33 M.Zimmermann, K.Dostert.. A Multipath for the Powerline Chanel. IEEE Transactions on Comunications. 2002,50(4):553~558
34 Xiao Hui, Zheng Xiangjun, Fan Shaosheng, Wu Xuebin. Medium-voltagepower Line Carrier Communication System. International Conference on Power System Technology. Singapore, 2004: 1536 - 1539
35 L.T.Tang, P.L.So, E.Gunawan, YL.Guan, S.Chen, T.Lie. Characterization and Modeling of In-Building Power Lines for High-Speed Data Transmission. IEEE Trans. Power Delivery, vol.18, Jan. 2003: 69~77
36张旭辉,张礼勇,杜中良,张旭.自适应低压电力线载波通信技术.电测与仪表. 2003年第4期: 45~47
37李元臣,刘维群,徐凯声.一种基于广度优先遍历的网络拓扑发现算法及其自适应研究.武汉理工大学学报(交通科学与工程版). 2005年6月第29卷第3期: 482~484
38 Derek coleman. Fiona Hayea.and Stephen Bear; Introducing Objectcharts or How to Use Statecharts in Object-Oriented Design. IEEE Trans. on software engineering Vol. 18 No. 1 JAN 1992:8~18
39 Britton J P An Open Object-Based Model as the Basis of an Architecture for Distribution Control Centers[J]. IEEE Trans on Power Systems, 1992. 7(4): 1500~ 1508.
40 Vadari S, Ma J T K. Application of Object-Oriented Techniques to Software Development in an EMS Environment[C]. Proc of Power Industry Computer Applications Conference. Salt Lake City(USA), 1995: 481~487.
41 Zhou E Z. Object-oriented programming, C++ and power system simulation[J]. IEEE Trans PS, 1996.11(1): 206~215.
42 Coad P,Yourdon E.邵维忠等译.面向对象的设计.北京大学出版社, 1994.
43 Coad P, Yourdon E. Object-oriented analysis (second edition). YOURDON. Press, Prentice Hall Building, Engle wood Cliffs, New Jersey, 1991
44 Booch G. Object-oriented analysis and design with applications (second edition)[M]. The Benjamin Cummings Publishing Co. Inc, USA 1994.
45 Ronald J. Norman著,周之英、肖奔放、柴洪钧译.面向对象系统分析与设计[M].北京:清华大学出版社. 2000.
46 Mike Foley, Anjan Bose et al. An Object Based Graphical User Interface for Power Systems[J]. IEEE Trans. on Power System,1993,8(1 ):475~478.
47方蕾,许建凤.基于Oracle的电费计算系统中电费计算速度优化问题的研究.广东输电与变电技术. 2004.3: 1~4
48林金山.基于C++ Builder的多层分布式结构设计与分析.沈阳工程学院学报(自然科学版). 2006年10月: 367~369
49秦文华,田海峰,刘新.低压电力线载波通信中远程数据的采集.电子技术. 2005.6: 58~60
50王珍,孙文静. C++ Builder中GUI程序中的多线程操作.开发研究与设计技术:152~153
51李志俊,程涛.基于多线程的串行多任务的实现.武汉理工大学学报. 2002年第五期:575~578
52 P. Nielsen, Microsoft SQL server 2000 bible, Wiley, New York (2002).
53 Kostas Papadakis, Eftichios Koutroulis and Kostas Kalaitzakis. A server database system for remote monitoring and operational evaluation of renewable energy sources plants. Renewable Energy, Volume 30, Issue 11, September 2005: Pages 1649-1669
54兰旭辉,熊家军,邓刚.基于MySQL的应用程序设计.计算机工程与设计.第25卷第3期:442~443
55施伯乐,定宝康,杨卫东.数据库教程.北京:电子工业出版社. 2004. 3.