Power flow calculation method of integrated electricity and heat system based on power conservation principle

被引：0
|
作者：
Sun H. [1 ,2 ]
Zhang P. [1 ,2 ]
Du W. [3 ]
Liu X. [1 ,2 ]
He G. [3 ]
机构：
[1] Key Laboratory of Control of Power Transmission and Conversion, Ministry of Education, Shanghai Jiao Tong University, Shanghai
[2] School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai
[3] NARI Technology Co., Ltd., Nanjing
来源：
Dianli Zidonghua Shebei/Electric Power Automation Equipment | 2020年 / 40卷 / 11期
基金：
国家重点研发计划;
关键词：
Convergence; Fixed point; Integrated electricity and heat system; Power conservation principle; Power flow calculation;
D O I：
10.16081/j.epae.202008013
中图分类号：
学科分类号：
摘要：
Power flow calculation represents the basis to analyze the steady-state operation of an integrated electricity and heat system. The multi-energy flow coupling caused by CHP(Combined Heat and Power) and other coupling components results in complicated calculation of combined power flow. Regarding the existing combined power flow calculation approach, the integrated approach suffers from the issues of huge computation burden and ill-conditioned Jacobian matrix. However, the decomposed approach is difficult to proof the algorithm convergence, and its iterative divergence issue cannot be well addressed. Hence, addressing these issues is of interest. For the system in which the slack node is connected with coupling units, the iterative formula of the slack nodes that respectively belong to heat network and the electricity network is derived according to the power conservation principle. Based on this, the convergence property of the decomposed method is analyzed, and the iterative fixed point is considered as an analytical solution of the slack node. Subsequently, a new method of combined power flow analysis is developed. Finally, simulative results of integrated electricity and heat systems prove that the proposed approach is efficient and accurate. It can also be used to solve the divergence problem of decomposition approaches. In addition, the feasible region of coupling parameters is estimated. © 2020, Electric Power Automation Equipment Press. All right reserved.
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页码：54 / 60
页数：6
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