Coordination And Dispatch Strategies For Multi-energy System Of Industrial Parks

In recent years,power system,gas system,cooling and heating system are becoming more and more closely connected.Energy system has been changing to a new clean power system as the core of multi-energy system(MES).Coordination and optimization control of a new generation of MES will confront to complex problems such as multi-energy flow coupling,multi-stakeholders and multi-time scale.Industrial park is a typical representative of MES.At present,there is still a lack of systematic and effective strategies for coordinated control and optimal dispatch of MES at industrial park level.In this paper,the coordinated control and optimal dispatch strategy of multi-energy system of industrial parks is systematically studied.The main contents are as follows:Ⅰ.The business process and application scenario of coordinated control of MES of industrial park level are analyzed.In order to form a common description of hierarchical-distributed coordination control,the business function module and business architecture of hierarchicaldistributed coordination control for multi-energy system based on unified modeling language(UML)is designed.The representative business of factory users and multi-energy operator in industrial parks are analyzed with case studies to facilitate the understanding of the process of this strategies between customers and programmers.Ⅱ.Considering the diverse omponents and the complexity of energy flow in MES,the quasi-steady state models of various energy production and supply device,storage device and terminal consumption device in MES are established.In addition,the general bus structure is adopted to describe the energy flow in MES.The device composition and energy flow in MES are clearly displayed and described,which provides a foundation for the coordinated and optimal diapatch of MES.Ⅲ.Based on the quasi-steady state device model of MES and the general bus energy flow structure,a bilevel optimal dispatch Strategy for MES is proposed to solve the complex problem of multi-stakeholder coordination and multi-energy coupling optimization calculation.Combining with multi-scenario analysis,the optimal control strategy and operation results under several different risk scenarios of tie-line are given.Ⅳ.The flexible and adjustable interactive resources in MES of industrial parks are further explored,the scope of the demand response(DR)is expanded,and the models and concepts of the integrated demand response(IDR)are established and enriched.The electricity demand response,cooling and heating demand response involved in the integ demand response are analyzed and described.Through different peak-cutting scenarios in case study,the effect of IDR in the coordinated control process for MES of industrial parks is evaluated,and its economical efficiency is also verified.Coordination and dispatch strategies for multi-energy system of industrial parks are proposed in this paper.The representative business model of coordination control is analysed and built.And a bilevel optimal dispatch strategy is proposed to reduce the difficulty in multienergy management.In addition,the flexible multi-energy resources in user sider are exploited through the IDR program.The research findings proposed in this paper can improve economical performance,decrease the difficulty in optimal dispatch and increase the flexibility of operation in industrial parks.