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Research On The Optimal Configuration And Opeartion For CCHP Microgrid

Posted on:2015-01-15Degree:MasterType:Thesis
Country:ChinaCandidate:S Y PengFull Text:PDF
GTID:2252330428477287Subject:Electrical engineering
Abstract/Summary:PDF Full Text Request
The urgent situation of the low energy utilization and the environmental pollution lead to highly attention of the utilization of the renewable and clean energy. Development of the combined cooling, heating and power (CCHP) microgrid by using distributed cogeneration equipment and renewable energy sources has drawn considerable research attention recently and has become the keynote of the second generation energy system technology. CCHP microgrid, with the cogeneration as the core part and multiple distributed units, has multiple energy balances and can realize the cascade utilization of energy. Distributed near the users’ end, the microgrid can also consume the renewable energy, thus it is convenient for energy management. It has multiple advantages including high energy utilization, high power supply reliability, flexible control, various operation modes and less environmental pollution and so on. In this dissertation, a study of optimal configuration and operation of CCHP was carried out, which includes many distributed units such as PV and battery. The main structure of the dissertation is shown as followed.First, an overall look of the CCHP microgrid is presented. Mathematical model of microturbine (MT), photovoltaic (PV) and battery are established. Cost function of unit capacity of MT, varying function which shows the power generation efficiency and thermal efficiency change with the load ratio are introduced. The discretization of KiBaM (Kinetic Battery Model) model is carried out for the sake of optimization. Probability model is adopted to deal with PV to fit the stochastic simulation.Second, the solution algorithm applied in the CCHP mocrogrid is introduced and performance indexes of CCHP are proposed to evaluate the minimum costs, the minimum emission of CO2and the minimum consumption of primary energy. Thus the model of optimal planning and operation of CCHP microgrid is established.Last, Monte-Carlo stochastic simulation is adopted to deal with the uncertainty of PV and load. The simulation carried out in this dissertation has three configuration schemes. The results show the different influences of the cooling, heating and power load on the system under different variance. Meanwhile, the function of the battery and the thermal storage tank are also analyzed. Multi-objective PSO algorithm is adopted to optimize the operation of CCHP microgrid. All economy, environment and energy saving of CCHP are considered.The work done in this dissertation can provide suggestions to CCHP microgrid configuration and energy management optimization improve energy utilization, increase the integration capability of renewable energy into the microgrid.
Keywords/Search Tags:microgrid, combined cooling, heating and power (CCHP), Stochastic simulation, optimal configuration, particle swarm optimization (PSO), optimal operation
PDF Full Text Request
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