| Electric power load control system, which is also called electric power load manage system, is a complete multi-functional system which integrates disciplines like modem management, application of computer, automatic control and information, and thus electric power business supervision and management, business copy, data collection and network connection can be realized. By effectively managing and controlling of electric load, we can improve load curve and advance using rate of Power Supply equipment, which can prevent from drawing strobe and limiting electricity and avoid affecting social produce and life. The wide application of load control system has become a trend of automatic technology of electivity enterprise, and has important effect on produce and management of the current electric company.In 1992, the electricity net was seriously short of electricity and it was very frequent to pull and limit strobe, which restrict badly the development of agriculture and industry and affected people's normal life. Therefore, the Economy Committee and Electric Power Bureau decided to set up a project in Science Committee of Chongqing and Power Supply Bureau of Sichuan province for the development of the load control system. And the former energy sources department has accepted Chongqing in the executive scope of load control system, and Chongqing became one of the 35 cities that were required to make electric power load control generally realized.The Chongqing electric power load system was set up in 1992, and by 1996, a control center composed by NOVELL network, six bi-directional relay transmit stations, 2 unilateral transmit stations and 1260 diversified terminals have been established, which covered areas managed by the former Electric Power Bureau of Chongqing .The System scope of the established electric power system was on the top place among the large and middle cities over the country.According to the need of situation, Chongqing electric power load system was reconstructed into Chongqing electric power management system. Now, we have set 2820 user collection terminals, which were composed by main center system and four relay stations and seven sub-centers and three secondary sub-centers. And according to demand and the feasibility, the function of system was enlarged into searching table of transformer substation and measure and inspection of public distributed change. And we set up load electric energy of Power Supply Bureau transformer substation andelectricity concentrated collection system of public distributed change. Therefore we added a larger scale system such as 105 transformer substation meter reading terminals and 714 public distributed change inspection system.These three systems made data collection task of electric power sale on each stage realized and promoted sales in many aspects to a large extent. Thus, the three systems become an indispensable support of information technology management.In the construction process of the three systems, we developed research of bypass substitute arithmetic to ensure data accuracy, and effectively solved the problem of distinguishing bypass substitution under present conditions.By means of establishing original DB and App DB, adding data- transition-module, we succeeded in designing and establishing data applied system of load power management system of Power Supply station.We have designed and established data collection center exchange network of sale of the whole company, and realized transfers demand of which met six Power Supply Bureau load management systems by using five frequency point, and succeeded in solving the problem of data collection and control management that main station of Power Supply Bureau provided user terminals.Our research has defined our communication role of load control system, which have high performance on the rate of system data transmissions, the management of system channels and response time of test and promptness of events.
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