| In recent years,combined with the increasing demand for energy utilization and the exacerbation of environmental pollution,the distributed generation(DG)has continuously accessed to the energy network due to its clean,efficient,energy saving and environmental protection features.The traditional independent planning operation of the electric/heating/cooling load is not conducive to improve the overall energy efficiency of the system.Therefore,considering the park planning which combines the multi-energy flow coordination planning technology with the energy supply equipment reasonable configuration,and further carries on the evaluation of the energy supply centre is gradually becoming an effective way for the reasonable,clean and efficient utilization of the energy.Based on this,the main work of this paper is as follows:Firstly,in view of the obvious distinctions among the energy utilization characteristics in various functional districts,a method for optimizing the location of an energy supply centre in a multi-energy complementary park with the spatial location and energy load density of each functional district is proposed.Based on the difference of electric/heating/cooling load characteristics,by taking the minimum improved integrated load moment of the system and the minimum partition inner interval ratio as the objective functions,the location optimization model of an energy supply centre in a multi-energy complementary park is established.This model comprehensively weighs the energy supply characteristics and zoning effects of a multi-energy complementary park,which lays a foundation for the optimal configuration of an energy supply centre in a multi-energy complementary park.Finally,the correctness and feasibility of the proposed planning model are verified by the example analysis.Secondly,considering the difference of the electric/heating/cooling energy flow in a multi-energy complementary park and the properties of energy conversion and space-time translation of the power to gas(P2G)technology,an energy supply equipment optimal configuration method in a multi-energy complementary park with P2 G planning is proposed,and a bi-level multi-objective energy supply equipment optimal configuration model in a multi-energy complementary park is also established.The optimization decision for the configuration capacity of each energy supply equipment and the dispatch value of each energy supply unit at each time is carried out in upper and lower level,respectively.Through the nested solving of upper and lower level,the model can ensure the economy,environmental protection and effect of wind power/photovoltaic output characteristics of the energy supply system in a multi-energy complementary park.Finally,combined with the related example,the correctness and effectiveness of the proposed optimal configuration method of various energy supply equipment are verified.Finally,considering the uncertainty of wind/photovoltaic output,an evaluation method of an energy supply centre in a multi-energy complementary park based on the improved universal generating function(UGF)method is proposed.In this method,the constraints of the startup and shutdown and the climbing of conventional energy supply units are taken into account,and a timing UGF model of each energy supply unit in a multi-energy complementary park which contains multiple DGs is established.What's more,considering the reliability,economy and electrothermal coupling characteristics of the energy supply centre,an evaluation index system of an energy supply centre with multiple DGs in a multi-energy complementary park is built and the probabilistic production simulation(PPS)and sensitivity analysis for the output of each energy supply unit in the park are also carried out.Thus,through the example analysis,the correctness and feasibility of the proposed evaluation method are verified,the overall evaluation of an energy supply centre in a multi-energy complementary park also can be carried out. |
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