scholarly journals Optimization and evaluation of operation strategies for regional distributed energy system

2020 ◽  
Vol 194 ◽  
pp. 01015
Author(s):  
Jingyi Yuan ◽  
Miao Li ◽  
Xiaoyu Liu ◽  
kun Xu
Keyword(s):  
Programming Model ◽  
Residential Buildings ◽  
Energy System ◽  
Pollutant Emissions ◽  
Mixed Integer ◽  
Distributed Energy ◽  
Real Time Control ◽  
Network Connection ◽  
Distributed Energy System ◽  
Electricity Network

With the development of energy technologies, the electricity, cooling and heating are tightly connected to improve the overall efficiency of distributed energy systems. These systems satisfy simultaneously different energy demands at building level (hotels, offices and residential buildings). The optimal capacity of technologies from numerous alternatives and optimal operating strategy as well as electricity network connection was investigated in this paper in order to achieve economic and environmental gains. A mixed integer linear programming model was also used for multi-objective optimization to minimize total cost and pollutant emissions. The results show that distributed energy system with electricity network as well as real time control can realize the better performance through multi-optimization from regional viewpoint. However, the results are on the contrary aiming at individual hotels and offices. The performance advancement of this system can only be reflected in residential buildings.

scholarly journals Economic and Environmental Optimization for Distributed Energy System Integrated with District Energy Network

Energies ◽  
2019 ◽  
Vol 12 (10) ◽  
pp. 1844 ◽  
Author(s):  
Miao Li ◽  
Yiran Feng ◽  
Maojun Zhou ◽  
Hailin Mu ◽  
Longxi Li ◽  
...  
Keyword(s):  
Programming Model ◽  
Residential Buildings ◽  
Energy System ◽  
Mixed Integer ◽  
Pollutant Emission ◽  
Distributed Energy ◽  
Night Time ◽  
Load Rate ◽  
Distributed Energy System ◽  
Electricity Network

The purpose of this research is to develop a mixed integer linear programming model for optimization of a distributed energy system integrated with electricity network. In this model, the optimal configuration of the selected equipment and dynamic intelligent control of the hourly electricity interchange among end-users were determined. The multi-objective function was to maximize the total cost saving and pollutant emission reduction. As an illustrative example, the model was applied to a neighborhood level containing hotel, office and residential buildings in Dalian, China. According to the results, with the installation of the electricity network, the load rate of the power generating unit in the hotel and office were improved and the power generate unit (PGU) often operated at full loads during the daytime with the surplus electricity distributed to the residential buildings. Furthermore, the overall performance was enhanced leading to a more than 30–40% reduction compared to the only distributed energy system (20–30%). In addition, the advancement of the electricity network was reflected in its application in office, where most of the excess electricity is transferred from office to residential building during the daytime in winter, while during the night time, the phenomenon was reversed, so that the office received electricity from residential buildings and no generated unit was at work in office.

scholarly journals The research of the schemes of regional distributed energy system

2018 ◽  
Vol 175 ◽  
pp. 04007
Author(s):  
LU Jin ◽  
YAN Tao ◽  
CAI Wen ◽  
Yang Hong-yan ◽  
WAN Zhong-hai
Keyword(s):  
Gas Turbines ◽  
Energy Supply ◽  
Energy System ◽  
Small Region ◽  
Supply System ◽  
Pollutant Emissions ◽  
Distributed Energy ◽  
Energy Supply System ◽  
Advantages And Disadvantages ◽  
Distributed Energy System

The distributed energy generation system is one of the main forms of the second-generation energy system currently. Three kinds of viable schemas of distributed energy supply system for nine users of the small region heat of Yangpu area combining with urban heating were proposed in this thesis, in which the gas turbines were selected. By analyzing the heat economy and pollutant emissions, the advantages and disadvantages of each schema were found out and the relatively better one was selected ultimately. Finally, some possible development trends and the prospects of the distributing energy supply system were also related and some complementary proposals were to table for some aspects of the system.

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

Energies ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 600
Author(s):  
Bin Ouyang ◽  
Lu Qu ◽  
Qiyang Liu ◽  
Baoye Tian ◽  
Zhichang Yuan ◽  
...  
Keyword(s):  
Power Flow ◽  
Load Condition ◽  
Energy Systems ◽  
Energy System ◽  
Optimal Operation ◽  
Energy Utilization ◽  
Utilization Rate ◽  
Distributed Energy ◽  
Low Load ◽  
Distributed Energy System

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.

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