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.

scholarly journals Energy, Environmental and Economic Performance of an Urban Community Hybrid Distributed Energy System

Energies ◽  
2020 ◽  
Vol 13 (10) ◽  
pp. 2545 ◽  
Author(s):  
Alberto Fichera ◽  
Elisa Marrasso ◽  
Maurizio Sasso ◽  
Rosaria Volpe
Keyword(s):  
Carbon Dioxide Emissions ◽  
Urban Community ◽  
Power Grid ◽  
Supply And Demand ◽  
Energy Systems ◽  
Energy System ◽  
Distributed Energy ◽  
General Validity ◽  
Economic Point ◽  
Distributed Energy System

Energy systems face great challenges from both the supply and demand sides. Strong efforts have been devoted to investigate technological solutions aiming at overcoming the problems of fossil fuel depletion and the environmental issues due to the carbon emissions. Hybrid (activated by both renewables and fossil fuels) distributed energy systems can be considered a very effective and promising technology to replace traditional centralized energy systems. As a most peculiar characteristic, they reduce the use of fossil sources and transmission and distribution losses along the main power grid and contribute to electric peak shaving and partial-loads losses reduction. As a direct consequence, the transition from centralized towards hybrid decentralized energy systems leads to a new role for citizens, shifting from a passive energy consumer to active prosumers able to produce energy and distribute energy. Such a complex system needs to be carefully modelled to account for the energy interactions with prosumers, local microgrids and main grids. Thus, the aim of this paper is to investigate the performance of a hybrid distributed energy system serving an urban community and modelled within the framework of agent-based theory. The model is of general validity and estimates (i) the layout of the links along which electricity is distributed among agents in the local microgrid, (ii) electricity exchanged among agents and (iii) electricity exported to the main power grid or imported from it. A scenario analysis has been conducted at varying the distance of connection among prosumers, the installed capacity in the area and the usage of links. The distributed energy system has been compared to a centralized energy system in which the electricity requests of the urban community are satisfied by taking electricity from the main grid. The comparison analysis is carried out from an energy, environmental and economic point of view by evaluating the primary energy saving, avoided carbon dioxide emissions and the simple payback period indices.

scholarly journals Improving Energy Sustainability of Suburban Areas by Using Distributed Energy Systems: A Case Study

Proceedings ◽  
2020 ◽  
Vol 58 (1) ◽  
pp. 7
Author(s):  
Beaud Muriel ◽  
Amarasinghage Tharindu Dasun Perera ◽  
Cai Hanmin ◽  
Andrew Bollinger ◽  
Kristina Orehounig
Keyword(s):  
Energy Demand ◽  
Energy Systems ◽  
Energy System ◽  
Distributed Energy ◽  
Building Sector ◽  
Urban Density ◽  
Suburban Areas ◽  
Energy Technologies ◽  
Distributed Energy System ◽  
The Impact

The building sector plays a vital role in Switzerland’s climate policy. In order to support the energy transition in the building sector, Rolle, a suburban area located along the shore of Lake Geneva is considered in this study to understand the promising future scenarios for integration of renewable energy technologies. The area is clustered into 12 clusters and a distributed energy system is designed for each cluster. Subsequently, three energy systems with contrasting densities are taken for further comparison to understand the impact of urban density on the design of the distributed energy system. The study reveals that urban density will influence the peak as well as the annual energy demand of the energy hubs. The study reveals that the energy technologies used in the energy hubs are strongly influenced by the capacity of the system (peak and annual energy demand). Energy systems with higher capacities are less sensitive to the market changes when compared to the systems with lower capacities (leading to sparse suburban areas).

scholarly journals Power management of a grid-connected distributed energy resource system

2021 ◽  
Author(s):  
Danilo Yu
Keyword(s):  
Power Flow ◽  
Renewable Energy Sources ◽  
Energy Resource ◽  
Energy System ◽  
Daily Basis ◽  
Energy Sources ◽  
Storage Device ◽  
Distributed Energy ◽  
Distributed Energy System ◽  
Modeling Software

This project introduces a modeling software that manages the power flow of a grid-connected distributed energy system on a daily basis. The system uses a control strategy that prioritizes the use of renewable energy sources over storage devices and conventional sources. Wind turbines and PV arrays are the primary sources of energy. Battery bank is used as the permanent storage device and small natural gas generators and the grid are the conventional sources. The software can manage the power flow of electric vehicles as mobile storage units. The power optimization algorithm monitors the power available from each energy source, analyzes and combines their outputs to meet the load demand. Output of the energy sources are analyzed using 15-minute time series simulations. The computer model was developed using MATLAB with a graphical user interface for easy setup, operation and analysis of the results.

Effect of Apply Pinch Analysis Theory to Distributed Energy Systems Integration

2013 ◽  
Vol 860-863 ◽  
pp. 634-638
Author(s):  
Zhi Yun Zhou ◽  
Pu Yan Zheng ◽  
Jian Gang Wang ◽  
Yan Zhou Yuan
Keyword(s):  
Heat Exchanger ◽  
System Integration ◽  
Heat Exchangers ◽  
Energy Systems ◽  
Original System ◽  
Energy System ◽  
Pinch Analysis ◽  
Distributed Energy ◽  
Analysis Theory ◽  
Distributed Energy System

Nowdays more and more methods for design and transformation Distributed Energy System are applied. Traditional optimization is based on the original system , by successively optimize the process in order to recovery heat as much as possible or to reduce the enery consumption . Pinch analysis can get the energy goal and expect heat exchangers number directly,according to the analysis of the users demand streams parameters cascade. In this paper, pinch analysis is applyed for the downstream heat exchanger network optimal design of the distributed energy system , and has proved that pinch analysis advantages for the distributed energy system integration.

scholarly journals Optimal operation of regional integrated energy system based on demand-side load response

2020 ◽  
Vol 213 ◽  
pp. 02005
Author(s):  
Peng Fang ◽  
Cui Mao ◽  
Yuping Chen ◽  
Shan Zhou ◽  
Rui You ◽  
...  
Keyword(s):  
Operating Cost ◽  
Electric Heating ◽  
Energy System ◽  
Optimal Operation ◽  
Energy Utilization ◽  
Utilization Rate ◽  
Demand Side ◽  
Side Load ◽  
Load Response ◽  
Integrated Energy System

The integrated energy system (IES) has the advantage of improving energy utilization and promoting energy flexibility. From the perspective of demand-side load response, this paper establishes demand-side power, thermal load response, and natural gas demand response models, and then constructs the objective function of the lowest operating cost of the regional IES for combined electric heating and gas supply, using Cplex to perform optimization. Finally, a typical northern park is taken as an example to analyze and verify the feasibility of the model and algorithm. The analysis of the case shows that considering the electric heating gas demand side response will be better than not considering or considering only the single and both responses, not only can reduce operating costs, achieve peak reduction and valley filling, but also reduce abandonment of wind and energy, and increase energy utilization rate.

Evaluating the Impact of Carbon Taxes on the Optimal Design of Distributed Energy Systems

2012 ◽  
Vol 524-527 ◽  
pp. 2420-2424 ◽  
Author(s):  
Zhe Zhou ◽  
Pei Liu ◽  
Jian Yun Zhang ◽  
Zheng Li
Keyword(s):  
Optimization Model ◽  
Carbon Tax ◽  
Energy Systems ◽  
Energy System ◽  
Optimal Configuration ◽  
Tax Rates ◽  
Carbon Taxes ◽  
Distributed Energy ◽  
Distributed Energy System ◽  
The Impact

Distributed energy systems can play an essential role in providing energy with substantial environmental and other benefits. This paper presents a multi-objective optimization model for the planning of distributed energy systems, aiming at simultaneous minimization of the total annual cost and greenhouse gas emissions. The impact of carbon tax rates on the optimal configuration and performance of a distributed energy system is evaluated based on the optimization model. A review of international policies on carbon taxes is performed for estimation of future carbon tax rates in China. Results show that the potential carbon tax in the future may not have significant impacts on the optimal configuration of a distributed energy system.

Integration of Distributing Energy System II: Optimization

2012 ◽  
Vol 512-515 ◽  
pp. 1151-1155
Author(s):  
Jin Yang Wang ◽  
Guo Min Cui ◽  
Fu Yu Peng
Keyword(s):  
Digital Simulation ◽  
Energy System ◽  
Simulation Software ◽  
Energy Utilization ◽  
Utilization Efficiency ◽  
Distributed Energy ◽  
Economic Operation ◽  
Distributed Energy System ◽  
Operation Parameters ◽  
Design Result

The optimization of the Distributed Energy System can improve the total energy utilization efficiency greatly and achieve energy saving. Based on the digital simulation software introduced by Part Ⅰ, the optimizations of matching parameters and structure can be achieved. The example results showed that numerical simulation can realize the optimization of matching parameters and economic operation parameters for the parts and the whole system, and the design result with the highest efficiency is obtained.

Development Prospects of Distributed Energy System in China

2008 ◽  
Author(s):  
Guohua Shi ◽  
Songling Wang ◽  
Youyin Jing ◽  
Yuefen Gao
Keyword(s):  
Energy Supply ◽  
Energy Demand ◽  
Energy Systems ◽  
Energy System ◽  
Combined Heat And Power ◽  
Distributed Energy ◽  
Distributed Energy System ◽  
Recent Trends ◽  
The Government ◽  
Development Prospects

With the rapid economic development, the energy demand is rising and energy-related greenhouses gas emissions are growing rapidly in China. The usage percent of renewable energy in use is still low while the energy consumption is still increasing. Due to the expanding pressure from energy demand, environment concerns and society issues, distributed energy systems (DESs), especially combined heat and power (CHP), are encouraged and expected to play a greater role by the government. This paper mainly seeks to explore and answer some of questions. Firstly, the different technologies of various DES options are briefly reviewed. Then the question of why distributed energy systems should be developed in China is considered. Recent trends and current patterns of energy supply and use in China are also discussed. Some typical distributed energy systems used in China are introduced. This article also discusses what barriers need be overcome if China wishes to move towards a sustainable energy future. Finally, several suggestions are proposed to favor the wide application of DES in China. It is concluded that DES is a good option with respect to China’s sustainable development that has institutional, market and regulatory support.

Sign in / Sign up

Export Citation Format

Share Document