1.School of Electric Power, South China University of Technology, Guangzhou 510640, China;2.Guangdong Key Laboratory of Clean Energy Technology (South China University of Technology), Guangzhou 510640, China;3.Guian Power Supply Bureau of Guizhou Power Grid Co., Ltd., Guiyang 550000, China
With the continuous access of new energy, the urban integrated energy system presents the characteristics of high coupling and high freedom degree. Using the mutual transformation relationship between different forms of energy, the multi-energy flow collaborative adjustment is realized to improve the energy utilization efficiency. Taking the minimum total operation cost as the system objective function and comprehensively considering the network architecture and operation mode of the urban integrated energy system with power grid as the hub platform, the joint optimal operation model of distributed energy unit, combined cooling, heating and power system, natural gas network and urban distribution network is established. Considering the multi-energy flow control of freedom degree as the multi-energy flow flexibility evaluation index of the urban integrated energy system, the game equilibrium-multidisciplinary collaborative optimization theory is used to establish parallel sub-disciplines from different perspectives to solve the model. This method improves the consistency constraints and sub-discipline objectives on the basis of multidisciplinary collaborative optimization theory, and overcomes the problems of slow convergence and local optimization of multidisciplinary collaborative optimization theory. The feasibility and effectiveness of the proposed model and algorithm are verified by an example of connecting a 4-bus distributed energy unit and a 6-bus combined cooling, heating and power system to a 33-bus urban area distribution network, which is coupled with a 7-bus natural gas network.
This work is supported by Guangdong Provincial Natural Science Foundation of China (No. 2021A1515012245) and the Major Industry University Research Cooperation Support Projects for the Fundamental Research Funds of the Central Universities (No. x2dlD2201280).
[1] | XIE Min, YE Jianan, LIU Mingbo, et al. Optimization and Evaluation of Urban Integrated Energy System Based on Game Equilibrium- Multidisciplinary Collaborative Theory[J]. Automation of Electric Power Systems,2022,46(17):102-113. DOI:10.7500/AEPS20220115003 |