Battery Capacity Evaluation Research on Wind\Battery Hybrid Generation System

2012 ◽  
Vol 512-515 ◽  
pp. 1022-1026 ◽  
Author(s):  
Zhi Huang Liu ◽  
Jie Qiong Han ◽  
Xue Jun Gao
Keyword(s):  
Energy Conversion ◽  
Evaluation Research ◽  
System Optimization ◽  
New Method ◽  
Generation Process ◽  
Generation System ◽  
Hybrid Generation ◽  
Capacity Evaluation ◽  
Battery Capacity ◽  
Peak Value

Battery capacity evaluation is a key work in wind\battery hybrid generation system optimization. Here a research about battery capacity evaluation of wind\battery hybrid generation system is made and a new way to evaluate the capacity is given. First, common evaluation methods such as integration peak value method are introduced. Then energy conversion constraints analysis in wind\battery hybrid generation process is given. Fake charge problem existed in integration peak value method is described comprehensively. At last, a new method to evaluate the battery capacity is put out.

Multi-Object Optimization Research about Wind/Solar Hybrid Generation System

2014 ◽  
Vol 672-674 ◽  
pp. 337-341
Author(s):  
Zhi Huang Liu ◽  
Hai Yuan Liu ◽  
Xue Jun Gao
Keyword(s):  
Test Data ◽  
Hybrid System ◽  
Optimization Model ◽  
Cost Control ◽  
System Optimization ◽  
Optimization Method ◽  
Generation System ◽  
Hybrid Generation ◽  
Pareto Solutions

Wind/solar hybrid system optimization is a key point for cost control. Here a multi-object optimization model is raised. Then a multi-object optimization method based on GA is used to find the Pareto solutions of wind/solar hybrid system. The test data shows that this method can get a good result.

The Thermodynamic Evaluation and Optimization of Fuel Cell Systems

2006 ◽  
Vol 3 (2) ◽  
pp. 155-164 ◽  
Author(s):  
N. Woudstra ◽  
T. P. van der Stelt ◽  
K. Hemmes
Keyword(s):  
Heat Transfer ◽  
Fuel Cells ◽  
High Temperature ◽  
Fuel Cell ◽  
Energy Conversion ◽  
System Optimization ◽  
Fuel Conversion ◽  
Cell Systems ◽  
Electrochemical Conversion ◽  
Conversion Efficiencies

Energy conversion today is subject to high thermodynamic losses. About 50% to 90% of the exergy of primary fuels is lost during conversion into power or heat. The fast increasing world energy demand makes a further increase of conversion efficiencies inevitable. The substantial thermodynamic losses (exergy losses of 20% to 30%) of thermal fuel conversion will limit future improvements of power plant efficiencies. Electrochemical conversion of fuel enables fuel conversion with minimum losses. Various fuel cell systems have been investigated at the Delft University of Technology during the past 20 years. It appeared that exergy analyses can be very helpful in understanding the extent and causes of thermodynamic losses in fuel cell systems. More than 50% of the losses in high temperature fuel cell (molten carbonate fuel cell and solid oxide fuel cell) systems can be caused by heat transfer. Therefore system optimization must focus on reducing the need for heat transfer as well as improving the conditions for the unavoidable heat transfer. Various options for reducing the need for heat transfer are discussed in this paper. High temperature fuel cells, eventually integrated into gas turbine processes, can replace the combustion process in future power plants. High temperature fuel cells will be necessary to obtain conversion efficiencies up to 80% in the case of large scale electricity production in the future. The introduction of fuel cells is considered to be a first step in the integration of electrochemical conversion in future energy conversion systems.

scholarly journals Value of Local Offshore Renewable Resource Diversity for Network Hosting Capacity

Energies ◽  
2020 ◽  
Vol 13 (22) ◽  
pp. 5913
Author(s):  
Wei Sun ◽  
Sam Harrison ◽  
Gareth P. Harrison
Keyword(s):  
Power Flow ◽  
Optimal Power Flow ◽  
Renewable Energy Sources ◽  
Renewable Resource ◽  
Distribution Networks ◽  
Hybrid Generation ◽  
Capacity Evaluation ◽  
Beneficial Impact ◽  
Resource Characteristics ◽  
Resource Diversity

It is imperative to increase the connectable capacity (i.e., hosting capacity) of distributed generation in order to decarbonise electricity distribution networks. Hybrid generation that exploits complementarity in resource characteristics among different renewable types potentially provides value for minimising technical constraints and increasing the effective use of the network. Tidal, wave and wind energy are prominent offshore renewable energy sources. It is of importance to explore their potential complementarity for increasing network integration. In this work, the novel introduction of these distinct offshore renewable resources into hosting capacity evaluation enables the quantification of the benefits of various resource combinations. A scenario reduction technique is adapted to effectively consider variation of these renewables in an AC optimal power flow-based nonlinear optimisation model. Moreover, the beneficial impact of active network management (ANM) on enhancing the renewable complementarity is also investigated. The combination of complementary hybrid generation and ANM, specifically where the maxima of the generation profiles rarely co-occur with each other and with the demand minimum, is found to make the best use of the network components.

Wind, Photovoltaic anD Mini-Hydro Hybrid Generation in Bolivia: A Case Study at a Mountainous Village

2005 ◽  
Vol 29 (3) ◽  
pp. 271-286 ◽  
Author(s):  
Tsutomu Dei ◽  
Kiyoshi Hirata ◽  
Izumi Ushiyama
Keyword(s):  
Renewable Energy ◽  
Energy Balance ◽  
Power Output ◽  
Renewable Energy Sources ◽  
Solar Irradiation ◽  
Energy Sources ◽  
Generation System ◽  
Hybrid Generation ◽  
Site Monitoring

This paper investigates the most feasible configuration for hybrid generation by indigenous renewable energy sources in Chachacomani village at 4,220 meters elevation in Bolivia. Site monitoring of wind, solar irradiation and the water level of the Jarma River was conducted for a year. The data enabled potential power output from Wind, PV and Micro Hydro generation system to be estimated. Energy balance calculations for different configuration of hybrid generation system were made. The results show that the three energy supplies would be complementary for integrated power.

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