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Research On Collaborative Optimization Of Integrated Energy System For Park Considering Electric Heating Demand Response

Posted on:2020-01-28Degree:MasterType:Thesis
Country:ChinaCandidate:F L XuFull Text:PDF
GTID:2392330602960347Subject:Electrical engineering
Abstract/Summary:PDF Full Text Request
In recent years,the environmental problems caused by the burning of a large number of fossil fuels have seriously restricted the coordinated development of China's economy,energy and environment.Under the dual pressures of energy crisis and environmental degradation,energy conservation and emission reduction have become the consensus of all walks of life.The energy system is one of the effective ways to solve the problems of low energy efficiency in society and the difficulty in eliminating renewable energy.The development of smart grid technology promotes the two-way interaction between the grid side and the load side,and the demand response stabilizes the intermittent and random fluctuations of new energy output.As the typical energy source,the park's integrated energy system not only facilitates management and operation,but also enables local energy consumption of new energy sources.It is the mainstream development direction of integrated energy systems.Therefore,in the comprehensive energy management,it is of great significance to study the multi-load comprehensive demand response strategy of the park's integrated energy system to save energy and reduce emissions,absorb new energy,and improve energy efficiency.On the basis of summarizing the research on integrated energy systems at home and abroad,the demand response problem is deeply studied and analyzed.However,the existing research pays less attention to the schedulability of multi-type energy load on the demand side,and the thermal load is deepened with the degree of electrothermal coupling.It also has schedulable value,and the development of multiple types of loads has prompted a single power demand response to evolve into an electric multi-load integrated demand response.In the new energy priority power generation environment,the cogeneration unit is forced to participate in the low-load power supply,and the low-load power supply leads to the contradiction between the supply and demand of heat supply,which is insufficient for heating.The market incentives are used to promote the participation of thermal users in the thermal demand response to alleviate the thermoelectric coupling problem.The literature has not been reported.Based on the peak-to-valley electricity price theory,a thermal price demand response model was established under the demand response mechanism.The time-sharing hot price was used to guide the users to orderly use heat on the heating side,and a multi-objective considering the user's thermal satisfaction was proposed.Peak and valley time-sharing heat price decision model.The simulation results show that the reasonable formulation of hot price and different heat method satisfaction constraints can effectively change the heat consumption mode of the user side and alleviate the contradiction between supply and demand of heat and power,and at the same time reduce the heating cost and realize the system economic operation.Based on the above-mentioned thermal demand response pricing model,considering the inherent characteristics of the heating load of the park,such as transmission delay and ambiguity of heating comfort,it can participate in the optimal dispatch as a flexible load,aiming at the minimum operating cost of the integrated energy system in the park.The collaborative optimization scheduling model of the park integrated energy system participated in the comprehensive demand response of electric heating load.The simulation results of the example show that compared with the optimization results of the traditional power demand response,the application of the integrated demand response of the electric heating load improves the flexibility of the production of the combined heat and power unit in the park.Considering the comprehensive demand response ratio of the electric heating load can be effective considering the single demand response.Reduce wind and light,reduce the total energy consumption cost of the demand side users and the operating cost of the system under the premise of ensuring the balance between supply and demand of the system,improve energy utilization efficiency,and realize environmental and economic operation of the system.It is of great value to introduce the concept of thermal demand response for the first time and incorporate it into the system optimization scheduling.Mining multiple load demand response capabilities in the integrated energy system can eff2ectively improve the operational flexibility of cogeneration units and achieve energy synergy.To improve wind power consumption.
Keywords/Search Tags:power demand response, renewrable consumption, comprehensive demand response, integrated energy system for park, Thermal demand response, multi-energy complementarity, integrated energy management
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