Consensus-Based Distributed Energy Management Method For Integrated Energy System

With the maturity of technology and extensive application of Integrated Energy System(IES)in the distribution network,its scale is increasing,the type of load is increasing,and the market participants are diversified.It is particularly important to coordinate with each other in the market participants.IES can achieve the goad of improving comprehensive energy utilization efficiency and overall social economic benefits through distributed energy management at community and regional levels.Firstly,Community Energy Internet(CEI)is taken as a research topic.In the CEI,an energy sharing framework for prosumers equipped with photovoltaic-thermal(PVT)system and heat pump(HP)is introduced.Supporting by the PVT and HP,the prosumer has four role attributes with either heat or electricity producer/consumer.A social welfare maximization model is built for the CEI,including PVT-HP prosumers,CHP system,and utility grid.Considering there are multiply participants in the local market of CEI,the social welfare maximization problem is decoupled by using Lagrange multiplier method.Moreover,a consensus-based fully distributed algorithm is designed to solve the problem.Finally,six residential buildings are selected as the case study to validate the effectiveness of the proposed method.Secondly.Regional Energy Internet(REI)is taken as another research topic.Energy management is an essential part for the operation of Integrated heat-electricity Energy Distribution System(IEDS).In this paper,a consensus energy management method is proposed to address the distributed optimization of IEDS.First,a social welfare maximization model of IEDS is built.Both energy supply side and demand side are participating in the local energy market to pursue their own profit.The CHP system operates in a modified strategy and both thermal and electricity load are considered to participate in demand response.Moreover,the convex optimal problem is decoupled using lagrange multiplier method and accordingly the primal problem is decoupled into 4 subproblems which are suitablefor applying consensus algorithm.A modified consensus algorithm is designed toimprove the convergence speed and solves the heat and electricity coupling of IEDS.Finally,IEEE-33 distribution system is re-designed as an IEDS to test the efficiency and effectiveness of the method.