| Demand side management (DSM) is a important method of power management. It derives from America which has the biggest consumption of energy in the world. The second world energy crisis in 70's 20th century and the severe pressure of environment protecting and the demand of sustainable development of electricity industry makes DSM being focused. It soon becomes popular in developed country and developing country. There had some good effects after DSM was operated in some countries. In recent years, DSM got extensive application in our country and got a lot of outcomes.With the fast development of our country's economy becoming marketing and globalization, the marketing environment and the developing room of electricity industry of our country is taking great changes. The reformation and developing of electricity industry will face very rigorous challenger. One is the resource and environment protecting limited the development of electricity industry, the other is the utilization rate of power resource is very low and the power consumption per GDP is very high. The waste of precious power resource is very severe. The important reason that causes the severe situation of power supply and demand is that the structure of power using in our country had taken big changes with the adjustment of country's economy structure and development of electricity industry. It typically expressed by upswing of the third industry's power consumption proportion and fast creasing of people's living power consumption. It also makes power-supply load rate to descend and to increase every year. At the same time, the capacity per generator is becoming more and more larger and invest of capacity per generator is creasing every year. By the application of DSM and load shifting, we can improve load rate of grip, shrink load peak-valley distinction, improve using rate of generating and supply device, cut down cost of power generating, decrease or put off generator installing, and relieve environment pollution, make the power user to improve using rate of power, cut down cost of power using. So it have great social and economy utilization. Because of this, the research on DSM become focus today.The main research content of this paper have five parts, such as: research on status of power market and DSM in our country at present; technology method and application of DSM; efficiency valuation of DSM; research on economy method of DSM; case study.①Analyzing status of sustainable development of electricity industry at present, revealing the meaning of application of DSM, and expounding that the emphasis of DSM application is people and business power using.② Describing peculiarity of some kinds of people and business power end-user, Analyzing all kinds of DSM technology methods that use to load shifting and improve power supply quality, and giving some advises to solve problems in application of DSM.③ In order to solve how to evaluate efficiency of DSM application all-round and quatitatively so as to make the society to understand the value of DSM, discussing methodology of all-round efficiency valuation of DSM.④ Aim for the problems of the power price system of our country at present, part-time price and real-time price and price on quality that suitable for DSM.⑤ Using application of DSM in A district for a case, analyzing application of DSM technology and economy methods and efficiency valuation of DSM that be Analyzed in this paper.Finally, through the research of DSM above, this paper gives some strategic advises to power enterprises on application of DSM.
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