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Energies 2017, 10(4), 514; doi:10.3390/en10040514

Generalized Energy Flow Analysis Considering Electricity Gas and Heat Subsystems in Local-Area Energy Systems Integration

1
State Key Laboratory of New Energy Power System, North China Electric Power University, Beijing 102206, China
2
School of Information Science and Engineering, Shenyang Ligong University, Shenyang 110159, China
3
China Energy Engineering Group Tianjin Electric Power Design Institute Co., Ltd., Tianjin 300400, China
*
Author to whom correspondence should be addressed.
Academic Editor: Ali Elkamel
Received: 19 January 2017 / Revised: 22 March 2017 / Accepted: 5 April 2017 / Published: 10 April 2017
(This article belongs to the Special Issue Energy Production Systems)
View Full-Text   |   Download PDF [2085 KB, uploaded 11 April 2017]   |  

Abstract

To alleviate environmental pollution and improve the efficient use of energy, energy systems integration (ESI)—covering electric power systems, heat systems and natural gas systems—has become an important trend in energy utilization. The traditional power flow calculation method, with the object as the power system, will prove difficult in meeting the requirements of the coupled energy flow analysis. This paper proposes a generalized energy flow (GEF) analysis method which is suitable for an ESI containing electricity, heat and gas subsystems. First, the models of electricity, heat, and natural gas networks in the ESI are established. In view of the complexity of the conventional method to solve the gas network including the compressor, an improved practical equivalent method was adopted based on different control modes. On this basis, a hybrid method combining homotopy and the Newton-Raphson algorithm was executed to compute the nonlinear equations of GEF, and the Jacobi matrix reflecting the coupling relationship of multi-energy was derived considering the grid connected mode and island modes of the power system in the ESI. Finally, the validity of the proposed method in multi-energy flow calculation and the analysis of interacting characteristics was verified using practical cases. View Full-Text
Keywords: energy systems integration (ESI); generalized energy flow (GEF); compressor; homotopy; Newton-Raphson; grid connected mode and island mode energy systems integration (ESI); generalized energy flow (GEF); compressor; homotopy; Newton-Raphson; grid connected mode and island mode
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Shi, J.; Wang, L.; Wang, Y.; Zhang, J. Generalized Energy Flow Analysis Considering Electricity Gas and Heat Subsystems in Local-Area Energy Systems Integration. Energies 2017, 10, 514.

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