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Research On Coordinated Control Of Park Integrated Energy System Based On Distributed Algorithm

Posted on:2021-02-24Degree:MasterType:Thesis
Country:ChinaCandidate:Y HanFull Text:PDF
GTID:2392330605467812Subject:Engineering
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In recent years,with the increasingly serious problem of energy supply and environmental pollution in China,the reform of energy consumption mode and the acceleration of the development and utilization of clean energy have become the focus of attention from all walks of life.The multi-energy system can meet the needs of multiple loads,breaking the independent operation and planning mode of each energy system.The multi-energy system is supported by a large number of national energy policies and energy projects.With the rapid development of a multi-energy system,a large amount of distributed energy access and multi-energy system coupling are increasingly strengthened.Higher requirements are put forward for the coordinated control method of the integrated energy system.At present,there is still a lack of systematic research on the distributed coordinated control of the multi-energy system in the park.In this context,based on the integrated energy system of a park in Guangzhou,this paper studies the coordinated control method of the integrated energy system of a park based on distributed computing.The main contents of this paper are as follows:(1)According to the strong coupling of cold/heat/electricity/gas and other energy subsystems in the multi-energy system of the park.The quasi-steady-state model of multi-energy supply equipment and energy storage equipment in the integrated energy system of the park is established.According to the type of energy transfer medium,each energy subsystem is divided into an electrical bus,hot gas buses,and cold gas buses,and the bus structure model is established.The energy flow in the multi-energy system of the park is described clearly.It lays a foundation for the coordinated control of the park's comprehensive energy system.(2)This paper studies the distributed optimal scheduling method of park multi-energy system based on the alternating direction multiplier method.The goal is to minimize the daily operation cost of users.The constraint is the exchange of power between the park gate and the superior power grid.This method decomposes the park optimization problem into sub-optimization problems of each user.This method solves the problems of low efficiency of traditional centralized computing methods and high hardware requirements for the joint dispatching center.This method also protects the data privacy of users' energy equipment.Finally,through the typical scenario in the example,the effectiveness and economy of the optimal scheduling method are verified,and the friendly interaction between the park and the superior power grid is guaranteed.(3)In this paper,the distributed emergency control method of park integrated energy system based on the alternating direction multiplier method is studied.This method considers the characteristics of energy transfer and interruptible load between users.This method proposes an emergency control method that does not change the power purchased by users and ensures the reliability of the energy supply of users' important equipment and solves the problem of energy shortage caused by energy equipment failure.This method verifies the effect of Park emergency control by several typical fault scenarios of distributed coordinated control.In this paper,the distributed coordinated control of the park's multi-energy system is studied,and the quasi-steady-state model and bus structure model of the park's typical energy equipment is established.And based on the alternating direction multiplier method,distributed optimal scheduling and distributed emergency control are realized.The method can improve the flexibility of the multi-energy system in the park.In the practical engineering application,the operation strategy can be formulated according to the actual needs of users to ensure the stable and reliable operation of the comprehensive energy system in the park.
Keywords/Search Tags:multi-energy system in the industrial park, distributed algorithm, coordinated control, alternating direction method of multipliers, optimal operation, emergency control
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