Priority power generation allocation method for reservoir power stations based on the priority index

2021 ◽  
pp. 129108
Author(s):  
Yanmei Zhu ◽  
Shijun Chen ◽  
Weibin Huang ◽  
Guangwen Ma
Keyword(s):  
Power Generation ◽  
Priority Index ◽  
Power Stations ◽  
Allocation Method

scholarly journals A Study on the Improvement of Efficiency by Detection Solar Module Faults in Deteriorated Photovoltaic Power Plants

2021 ◽  
Vol 11 (2) ◽  
pp. 727 ◽  
Author(s):  
Myeong-Hwan Hwang ◽  
Young-Gon Kim ◽  
Hae-Sol Lee ◽  
Young-Dae Kim ◽  
Hyun-Rok Cha
Keyword(s):  
Power Generation ◽  
Power Plants ◽  
Detection System ◽  
Failure Detection ◽  
Solar Module ◽  
Thermal Images ◽  
Power Stations ◽  
Photovoltaic Power ◽  
Manufacturing Technologies ◽  
Pv Power Generation

In recent years, photovoltaic (PV) power generation has attracted considerable attention as a new eco-friendly and renewable energy generation technology. With the recent development of semiconductor manufacturing technologies, PV power generation is gradually increasing. In this paper, we analyze the types of defects that form in PV power generation panels and propose a method for enhancing the productivity and efficiency of PV power stations by determining the defects of aging PV modules based on their temperature, power output, and panel images. The method proposed in the paper allows the replacement of individual panels that are experiencing a malfunction, thereby reducing the output loss of solar power generation plants. The aim is to develop a method that enables users to immediately check the type of failures among the six failure types that frequently occur in aging PV panels—namely, hotspot, panel breakage, connector breakage, busbar breakage, panel cell overheating, and diode failure—based on thermal images by using the failure detection system. By comparing the data acquired in the study with the thermal images of a PV power station, efficiency is increased by detecting solar module faults in deteriorated photovoltaic power plants.

scholarly journals Multi-Objective Sizing of Hybrid Energy Storage System for Large-Scale Photovoltaic Power Generation System

2019 ◽  
Vol 11 (19) ◽  
pp. 5441 ◽  
Author(s):  
Chao Ma ◽  
Sen Dong ◽  
Jijian Lian ◽  
Xiulan Pang
Keyword(s):  
Power Generation ◽  
Energy Storage ◽  
Large Scale ◽  
Yellow River ◽  
Storage System ◽  
Weather Conditions ◽  
Energy Storage System ◽  
Hybrid Energy ◽  
Hybrid Energy Storage ◽  
Power Stations

Hybrid energy storage systems (HESS) are an effective way to improve the output stability for a large-scale photovoltaic (PV) power generation systems. This paper presents a sizing method for HESS-equipped large-scale centralized PV power stations. The method consists of two parts: determining the power capacity by a statistical method considering the effects of multiple weather conditions and calculating the optimal energy capacity by employing a mathematical model. The method fully considers the characteristics of PV output and multiple kinds of energy storage combinations. Additionally, a pre-storage strategy that can further improve stability of output is proposed. All of the above methods were verified through a case study application to an 850 MW centralized PV power station in the upstream of the Yellow river. The optimal hybrid energy storage combination and its optimization results were obtained by this method. The results show that the optimal capacity configuration can significantly improve the stability of PV output and the pre-storage strategy can further improve the target output satisfaction rate by 8.28%.

scholarly journals Hydropower Generation on The Nysa Klodzka River

2014 ◽  
Vol 21 (2) ◽  
pp. 327-336 ◽  
Author(s):  
Robert Kasperek ◽  
Mirosław Wiatkowski
Keyword(s):  
Power Generation ◽  
Electric Power ◽  
Power Plants ◽  
Renewable Energy Sources ◽  
Primary Energy ◽  
Energy Sources ◽  
Hydropower Generation ◽  
Electric Power Plants ◽  
Power Stations ◽  
Total Capacity

Abstract Adopted in 2009, the Directive of the European Parliament and of the Council on the promotion of the use of energy from renewable sources sets out the rules for how Poland is to achieve the 15% target of total primary energy from renewables by 2020. However, there are fears that the goals set out in this Directive may not be met. The share of Renewable Energy Sources (RES) in national energy consumption (150 TWh) is estimated at 8.6 TWh in 2009 and 12 TWh in 2011 (5.7 and 8% respectively). The level of RES in Poland until 2005 was approx. 7.2%. The analysis of RES technologies currently in use in Poland shows that in terms of the share in the total capacity, the 750 hydro-electric power plants which are currently in operation (with the overall capacity of almost 0.95 GW) are second only to wind power stations (2 GW). The authors have studied the Nysa Klodzka River in terms of possible locations for hydro-electric facilities. Eight locations have been identified where power plants might be constructed with installed capacities ranging from 319 to 1717 kW. The expected total annual electric power generation of these locations would stand at approx. 37.5 GWh.

Efficient Power Generation From Large 750°C Heat Sources: Application to Coal-Fired and Nuclear Power Stations

1980 ◽  
Author(s):  
Z. P. Tilliette ◽  
B. Pierre
Keyword(s):  
Power Generation ◽  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Energy ◽  
Inlet Temperature ◽  
Heat Sources ◽  
Turbine Inlet Temperature ◽  
Power Stations ◽  
Efficient Power ◽  
Steam Cycle

Considering the concern about a more efficient, rational use of heat sources, and a greater location flexibility of power plants owing to cooling capability, closed gas cycles can offer new solutions for fossil or nuclear energy. An efficient heat conversion into power is obtained by the combination of a main non-intercooled helium cycle with a flexible, superheated, low-pressure bottoming steam cycle. Emphasis is placed on the matching of the two cycles and, for that, a recuperator bypass arrangement is used. The operation of the main gas turbocompressor does not depend upon the operation of the small steam cycle. Results are presented for a conservative turbine inlet temperature of 750 C. Applications are made for a coal-fired power plant and for a nuclear GT-HTGR. Overall net plant efficiencies of 39 and 46 percent, respectively, are projected.

COMPARATIVE FUNDING CONSEQUENCES OF LARGE VERSUS SMALL GAS-FIRED POWER GENERATION UNITS

1995 ◽  
Vol 35 (1) ◽  
pp. 719
Author(s):  
N.G. Johnson
Keyword(s):  
Power Generation ◽  
Financial Risk ◽  
Financial Analysis ◽  
Supply Contracts ◽  
Contract Negotiations ◽  
Capital Costs ◽  
Power Stations ◽  
Risk Characteristics ◽  
Private Power ◽  
Installed Capacity

Gas producers are increasingly looking to privately-owned gas-fired power generation as a major growth market to support the development of new fields being discovered across Australia.Gas-fired generating technology is more environmentally friendly than coal-fired power stations, has lower unit capital costs and has higher efficiency levels. With the recent downward trends in gas prices for power generation (especially in Western Australia) it is likely that gas will indeed be the consistently preferred fuel for generation in Australia.Gas producers should be sensitive to the different financial and risk characteristics of the potential markets represented by large versus small gas-fired private power stations. These differences are exaggerated by the much sharper focus given by the private sector to quantifying risk and to its allocation to the parties best able to manage it.The significant commercial differences between classes of generation projects result in gas producers themselves being exposed to diverging risk profiles through their gas supply contracts with generating companies. Selling gas to larger generation units results in gas suppliers accepting proportionately (i.e. not just pro-rata to the larger installed capacity) higher levels of financial risk. Risk arises from the higher probability of a project not being completed, from the increased size of penalty payments associated with non-delivery of gas and from the rising level of competition from competing gas suppliers.A conclusion is that gas producers must fully understand the economics and risks of their potential electricity customers. Full financial analysis will materially help the gas supplier in subsequent commercial gas contract negotiations.

A discussion on advanced methods of energy conversion- Magnetohydrodynamic power generation - The prospective economics and thermal efficiency of large scale open cycle m .h .d . stations

1967 ◽  
Vol 261 (1123) ◽  
pp. 394-400
Keyword(s):  
Power Generation ◽  
Thermal Efficiency ◽  
Large Scale ◽  
Oxygen Enrichment ◽  
Heat Losses ◽  
Attractive Alternative ◽  
Endothermic Reaction ◽  
Power Stations ◽  
Open Cycle ◽  
Economic Considerations

The overall thermal efficiency of several different fossil fuelled power stations is discussed using an m.h.d. generator and the conventional method of preheating the combustion with exhaust gases from the generator. Air preheat temperatures of between 1300 and 1700 °C are considered when over-all efficiencies of 51 and 61% may be attained. If the generator length is to be restricted to between 10 and 15 m in order to limit duct heat losses magnetic fields of 4 to 6 Wb/m 2 are required. The use of oxygen enrichment is found at present to be uneconomic but reacting methane with steam (an endothermic reaction) to give the fuel to be burnt is an attractive alternative process although not as good thermodynamically as air preheating. Economic considerations indicate that m.h.d. may only be useful for high cost fuels.

Clean coal technologies

1997 ◽  
Vol 211 (1) ◽  
pp. 95-107 ◽  
Author(s):  
J T McMullan ◽  
B C Williams ◽  
E P Sloan
Keyword(s):  
Power Generation ◽  
Fossil Fuels ◽  
Combined Cycle ◽  
Fluidized Bed Combustion ◽  
Integrated Gasification Combined Cycle ◽  
Good Efficiency ◽  
Power Stations ◽  
Pulverized Fuel ◽  
Integrated Gasification ◽  
Pulverized Combustion

Power generation in Europe and elsewhere relies heavily on coal as the source of energy and this reliance will increase in the future as other fossil fuels become progressively more expensive. The existing stock of coal-fired power stations mainly use pulverized fuel boilers and present designs based on ultrasupercritical steam cycles are as efficient and as low in SOx and NOx emissions as is possible without incurring excessive additional costs. This paper examines the options for coal-based power generation technologies and compares their technical, environmental and economic performance. These options include atmospheric and pressurized fluidized bed combustion and a range of integrated gasification combined cycle systems. Integrated gasification combined cycles give good efficiency and very low emissions, but further optimization is required to make them economically attractive. Conceptual cycles based on pressurized pulverized combustion, dual fuel hybrid cycles, fuel cells and magnetohydrodynamics are also covered in outline.

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