Calculation and Analysis of the Interval Power Flow for Distributed Energy System Based on Affine Algorithm

Bin Ouyang, Lu Qu, Qiyang Liu, Baoye Tian, Zhichang Yuan, Peiqian Guo, Hongyi Dai and Weikun He
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Bin Ouyang: Department of Electrical Engineer, Tsinghua University, Beijing 100084, China
Lu Qu: Department of Electrical Engineer, Tsinghua University, Beijing 100084, China
Qiyang Liu: Tsinghua-Towngas Joint Research Center for Regional Comprehensive Energy Planning Technology, Beijing 100084, China
Baoye Tian: State Key Laboratory of HVDC, Electric Power Research Institute, CSG, Guangzhou 510663, China
Zhichang Yuan: Department of Electrical Engineer, Tsinghua University, Beijing 100084, China
Peiqian Guo: Department of Electrical Engineer, Tsinghua University, Beijing 100084, China
Hongyi Dai: State Grid Zhangzhou Electric Power Supply Company, Zhangzhou 363300, China
Weikun He: State Grid Zhangzhou Electric Power Supply Company, Zhangzhou 363300, China

Energies, 2021, vol. 14, issue 3, 1-14

Abstract: Due to the coupling of different energy systems, optimization of different energy complementarities, and the realization of the highest overall energy utilization rate and environmental friendliness of the energy system, distributed energy system has become an important way to build a clean and low-carbon energy system. However, the complex topological structure of the system and too many coupling devices bring more uncertain factors to the system which the calculation of the interval power flow of distributed energy system becomes the key problem to be solved urgently. Affine power flow calculation is considered as an important solution to solve uncertain steady power flow problems. In this paper, the distributed energy system coupled with cold, heat, and electricity is taken as the research object, the influence of different uncertain factors such as photovoltaic and wind power output is comprehensively considered, and affine algorithm is adopted to calculate the system power flow of the distributed energy system under high and low load conditions. The results show that the system has larger operating space, more stable bus voltage and more flexible pipeline flow under low load condition than under high load condition. The calculation results of the interval power flow of distributed energy systems can provide theoretical basis and data support for the stability analysis and optimal operation of distributed energy systems.

Keywords: distributed energy systems; affine algorithm; interval power flow; cold-heat-electricity-coupling; different energy systems (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
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