面向区域综合能源服务的电-水联合潮流

Combined load flow of integrated electricity-water system for regional multi-energy service

现有关于综合能源系统潮流的研究大多以电力、热力、燃气系统耦合形成的多能系统为研究主体,而少量关于电-水联合系统潮流的研究又存在耦合方式单一、模型适应性差等问题。为此面向区域供电、供水综合服务商,提出配电网、配水网耦合形成的区域电-水联合系统的潮流模型和计算方法。提出2种用户级电-水能源集线器模型以描述终端用户综合用能行为产生的电-水关联关系;在此基础上,考虑电-水之间的泵站耦合和用户级能源集线器2种耦合方式,以及水负荷的水压特性,提出区域电-水联合潮流模型及计算方法;用2个不同规模的区域电-水联合系统验证了所提潮流计算方法的有效性,并对比分析了用户级电-水能源集线器及水负荷水压特性对联合潮流的影响。

Most existing researches on the load flow analysis of integrated energy system focus on the multienergy system composed of power,heat and natural gas system.There are only a few researches on the load flow of IEWS(Integrated Electricity-Water System),which,however,suffer from the problems of single coupling mode and poor adaptability.To address these problems,the load flow model and its calculation method for a regional IEWS composed of a power distribution network and a water distribution network are proposed to provide an analysis tool for the regional integrated electricity-water service providers.Firstly,two user-level electricity-water energy hub models are established to describe the electricity-water relationship of integrated energy consumption behaviors of terminal users.On this basis,the approach to calculate the regional integrated electricity-water load flow is proposed.In this model,different couplings between electricity and water(i.e.the couplings through pump station and user-level energy hubs),and the pressuredemand relationship of water loads are taken into account.The proposed method is verified by two regional IEWS test cases that have different scales.The impacts of user-level electricity-water energy hubs and the pressure-demand characteristics of water loads on the load flow distribution are compared and discussed.