Studies On Quantifying Benefits Of Demand Response

As an integral part of electricity market mechanism and an important means of enhancing interaction of electricity grid operation, demand response is becoming the focus of smart grid construction. In day-ahead electricity market, time-of-use electricity tariffs or other incentive measurements are designed to encourage customers to shed their electrical load from peak times to off peak times, which helps the operator to run the system more efficiently. To accurately evaluate the effects of demand response on market participants, quantifying analysis must be done, which is important to grasp the potential of demand response and promote the implementation of demand response programs. By now, three kinds of method have been used to quantify demand response benefits including short-term benefits analysis, long-term benefits analysis and program performance analyses. The thesis, based on the smart grid construction and guided by mathematical optimization theories, from different time scales, performs meticulous and thorough work of research and practice on quantifying demand response benefits.Firstly, this thesis proposes a method for quantifying short-term benefits of demand response. Social benefits of demand response and different market participants'benefits are evaluated based on day-ahead electricity market auction. Emphasis is put on participants'benefits change owing to unit turn-on and turn-off during demand response, which lays a foundation for the future study.Based on the short-term benefits analysis, the involvement of demand response is presented on the basis of the traditional indicators of daily load characteristics. Drawing on the method of weighted average cost, the optimum involvement of demand response is discussed in order to maximize the social benefits, which is significant to design reasonable rule of demand response.In longer time scale, many problems such as dynamics, time-delay, nonlinearity, feedback are existed in quantifying long-term benefits of demand response. Based on the theory of system dynamics, a system dynamic model of demand response is established by simulation software VENSIM special for system dynamics. The impact of customer satisfaction on demand shifting is carried out by VENSIM. Comparative analysis can be carried out by enter different parameters. The establishment of the proposed model can provide the useful technique support for further establishment and implementation of demand response policies.