多能互补能源系统多维度综合评价方法

Multi-dimensional comprehensive evaluation of multi-energy complementary energy system

随着风光等清洁能源的广泛应用,具有多能互补特性的能源系统受到了广泛关注。该研究基于多能互补能源系统架构和利益主体间关系,从清洁低碳水平、安全可靠水平、能源利用水平、高效经济水平、社会服务水平等维度构建多能互补能源系统评价指标体系;提出了基于G1-CV离差最大化综合赋权-多层次物元可拓评价方法,对系统的建设与运行成果进行综合评价;最后用算例验证了指标体系与评价方法的科学有效性。该研究可为多能互补能源系统的最优规划和运行提供理论指导。

Low-carbon and sustainable development has drawn much attention in social communities in recent years.The conventional single energy system cannot meet the urgent needs of sustainable energy against the background of energy shortage,due mainly to the low utilization efficiency and many deficiencies in technology.As a result,a multi-energy complementary energy system has emerged at present.It is necessary to fully evaluate the implementation of multi-energy complementary energy system for the economic and social benefits.In this article,a system architecture was first designed,according to the"source-network-load-storage"structure,including energy inputs(such as wind,light,gas,and electricity),load demand for electricity,heat,cold,and gas,as well as energy conversion equipment(such as gas turbines,electric refrigerators,and electric boilers).Then,the demand relationship was established among the three stakeholders:energy suppliers,local governments,and energy users.Five levels were set to be evaluated,including the clean and low-carbon,safe and reliable,energy utilization,high-efficiency economic,and social service level.An evaluation index system was then constructed for the multi-energy complementary energy system,including 5 first-level and 45 second-level indicators.The detailed indicators were defined,such as the proportion of electric heating(gas)replacement time,energy storage equipment(battery,heat storage tank,and gas storage tank)peak shaving capacity,user smart energy participation,and energy business online operation rate.Among them,the G1 was used for the subjective weighting of indicators,while the CV was used for the objective weighting,where the subjective and objective weights were combined,according to the optimal comprehensive weight using the maximizing deviation method.As such,this weighting was adopted the expert opinions,together with the indicator data.The improved multi-level matter-element extension was used to comprehensively evaluate the multi-energy complementary energy system.Finally,the evaluation was implemented using G1-CV maximum deviation comprehensive weighting-multi-level matter-element extension,particularly suitable for the three-level evaluation index system.In addition,an example was selected to verify the evaluation index system.Consequently,the comprehensive evaluation can also be expected to serve the construction and operation for different multi-energy complementary energy systems,further to obtain refined evaluation from various dimensions.This finding can also provide a theoretical guidance for the optimal planning of energy system.