scholarly journals A Multi-Objective Scheduling Optimization Model for a Multi-Energy Complementary System Considering Different Operation Strategies

2018 ◽  
Vol 8 (11) ◽  
pp. 2293 ◽  
Author(s):  
Liwei Ju ◽  
Peng Li ◽  
Qinliang Tan ◽  
Lili Wang ◽  
Zhongfu Tan ◽  
...  
Keyword(s):  
Power Plants ◽  
Thermal Power ◽  
Clean Energy ◽  
Life Cycles ◽  
Solution Algorithm ◽  
Coal Consumption ◽  
Power Sources ◽  
Multi Objective ◽  
Complementary System ◽  
Objective Model

In order to reduce the amount of abandoned clean energy, the complementary characterization of wind power plants (WPPs), photovoltaic power plants (PVs), hydropower stations (HSs), and thermal power plants (TPPs) combined with energy storage devices (ESDs) is considered, and they are integrated into a multi-energy complementary system (MECS). Firstly, a scenario-generating technique is proposed for uncertainty factors using the Wasserstein method and the improved K-medoids theory. Then, a multi-objective model and solution algorithm are constructed under the objectives of attaining the maximum operation revenue, the minimum abandoned energy cost, and the minimum output fluctuations. Meanwhile, the influence of different ESD operation modes on MECS operation is discussed, specifically, the longest life cycle (LLC) and the optimum economic efficiency (OEE). Thirdly, in order to solve the multi-objective model, a solution algorithm is proposed by using the rough set method to convert the multi-objective model into a single objective model based on the payoff table. Moreover, the complementary features of the MECS are evaluated in terms of the load tracking degree, HS secondary peaking capacity, and units of coal consumption. Finally, the improved IEEE 14-bus system is chosen for the simulation analysis. The results show that (1) the proposed uncertainty simulation method can efficiently generate the most representative scenarios; (2) MECSs can utilize complementary power sources, the OEE mode can better optimize MECS scheduling, and the LLC mode can ensure the ESDs’ life cycles; (3) the scheduling scheme of MECS operation reach the optimal level when the capacity ratio of ESD:WPP–PV iso [0.62, 0.77] in the OEE mode and [1, 1.08] in the LLC mode on a typical summer day, and the ratio is [0.92, 1] in the OEE mode and [1.23, 1.31] in the LLC mode on a typical winter day. Therefore, the proposed model provides effective decision-making support for designing the optimal plan for MECS operation.

scholarly journals Can Hydropower Still Be Considered a Clean Energy Source? Compelling Evidence from a Middle-Sized Hydropower Station in China

2019 ◽  
Vol 11 (16) ◽  
pp. 4261 ◽  
Author(s):  
Xuerong Li ◽  
Faliang Gui ◽  
Qingpeng Li
Keyword(s):  
Power Plants ◽  
Thermal Power ◽  
Construction Materials ◽  
Ghg Emissions ◽  
Energy Resource ◽  
Clean Energy ◽  
Hydropower Station ◽  
Intergovernmental Panel ◽  
Fossil Carbon ◽  
Global Economic Growth

The development of clean energy is of great importance in alleviating both the energy crisis and environmental pollution resulting from rapid global economic growth. Hydroelectric generation is considered climate benign, as it neither requires fossil carbon to produce energy nor emits large amounts of greenhouse gases (GHG), unlike conventional energy generation techniques such as coal and oil power plants. However, dams and their associated reservoirs are not entirely GHG-neutral and their classification as a clean source of energy requires further investigation. This study evaluated the environmental impact of the Xiajiang hydropower station based on life cycle assessment (LCA) according to the 2006 Intergovernmental Panel on Climate Change (IPCC) guidelines, focusing specifically on GHG emissions after the submersion of the reservoir. Results reveal that although hydropower is not as clean as we thought, it is still an absolute “low emissions” power type in China. The amount of GHG emissions produced by this station is 3.72 million tons with an emissions coefficient of 32.63 g CO2eq/kWh. This figure is lower than that of thermal power, thus implying that hydropower is still a clean energy resource in China. Our recommendations to further minimize the environmental impacts of this station are the optimization of relevant structural designs, the utilization of new and improved construction materials, and the extension of farmland lifting technology.

scholarly journals MIRACLE OR MIRAGE? CRITICAL CONTRIBUTIONS TO THE THEORY OF ECOLOGICAL MODERNIZATION IN LIGHT OF THE DESERTEC PROJECT

2020 ◽  
Vol 23 ◽  
Author(s):  
LUIZ ENRIQUE VIEIRA DE SOUZA ◽  
MARCELO FETZ ◽  
ALINA MIKHAILOVNA GILMANOVA CAVALCANTE
Keyword(s):  
North Africa ◽  
Research Agenda ◽  
Power Plants ◽  
Thermal Power ◽  
Clean Energy ◽  
Ecological Modernization ◽  
Sahara Desert ◽  
International Media ◽  
Solar Thermal Power ◽  
Limited Scope

Abstract This investigation analyzes the Desertec project, which envisioned a transition to “clean energy” through constructing solar thermal power plants in the Sahara Desert and linking Europe, North Africa, and the Middle East via high voltage cables. Despite great enthusiasm in the international media and some sectors of civil society, the project faced so many obstacles that even the consortium which initially fostered the initiative decided to withdraw. This article uses this case to critically assess the theoretical and epistemological assumptions of the theory of ecological modernization, pointing out an alternate research agenda which focuses on unsuccessful projects in this area (failure cases), emphasizing the limited scope of this theory and the teleological postulate which assumes convergence between economic and environmental rationalities.

Multi-Objective Optimal Load Distribution Based on Sub Goals Multiplication and Division in Power Plants

2014 ◽  
Vol 494-495 ◽  
pp. 1715-1718
Author(s):  
Gui Li Yuan ◽  
Tong Yu ◽  
Juan Du
Keyword(s):  
Genetic Algorithm ◽  
Load Distribution ◽  
Power Plants ◽  
Optimization Problem ◽  
Thermal Power ◽  
Local Optimum ◽  
Multi Objective Optimization ◽  
Multi Objective ◽  
Optimal Load ◽  
Optimal Load Distribution

The classic multi-objective optimization method of sub goals multiplication and division theory is applied to solve optimal load distribution problem in thermal power plants. A multi-objective optimization model is built which comprehensively reflects the economy, environmental protection and speediness. The proposed model effectively avoids the target normalization and weights determination existing in the process of changing the multi-objective optimization problem into a single objective optimization problem. Since genetic algorithm (GA) has the drawback of falling into local optimum, adaptive immune vaccines algorithm (AIVA) is applied to optimize the constructed model and the results are compared with that optimized by genetic algorithm. Simulation shows this method can complete multi-objective optimal load distribution quickly and efficiently.

scholarly journals Cordon Pricing Considering Air Pollutants Emission

2016 ◽  
Vol 28 (2) ◽  
pp. 179-189
Author(s):  
Shahriar Afandizadeh ◽  
Seyed Ebrahim Abdolmanafi
Keyword(s):  
Optimal Design ◽  
Air Pollutants ◽  
Solution Space ◽  
Solution Algorithm ◽  
Multi Objective ◽  
Pricing Scheme ◽  
Strength Pareto Evolutionary Algorithm ◽  
Pollutants Emission ◽  
Objective Model

This paper considers the issue of air pollutants emission for the optimal and sustainable determination of cordon location, toll level, and price of park and ride (P&R). Although air pollutants emission decreases within the cordon by the implementation of cordon pricing scheme, it may increase outside the cordon and the whole network. Hence, air pollutants emission may only transfer from inside of the cordon to its outside. Therefore, in this paper, a multi-objective bi-level optimization model is developed. A solution algorithm is also presented based on the second version of strength Pareto evolutionary algorithm (SPEA2). The results reveal that this multi-objective model can be a useful tool for the sustainable and optimal design of the cordon and P&R scheme. In addition, cordon pricing is a multi-objective problem. Therefore, it is necessary to consider air pollutants emission. By choosing another non-dominated result in the solution space, air pollutants emission outside the cordon and the whole network can be reduced without a significant reduction in social welfare.

Multi-objective superstructure-free synthesis and optimization of thermal power plants

Energy ◽  
2016 ◽  
Vol 116 ◽  
pp. 1104-1116 ◽  
Author(s):  
Ligang Wang ◽  
Matthias Lampe ◽  
Philip Voll ◽  
Yongping Yang ◽  
André Bardow
Keyword(s):  
Power Plants ◽  
Thermal Power ◽  
Thermal Power Plants ◽  
Multi Objective

scholarly journals Trend and characteristics of atmospheric emissions of Hg, As, and Se from coal combustion in China, 1980–2007

2010 ◽  
Vol 10 (9) ◽  
pp. 20729-20768 ◽  
Author(s):  
H. Z. Tian ◽  
Y. Wang ◽  
Z. G. Xue ◽  
K. Cheng ◽  
Y. P. Qu ◽  
...  
Keyword(s):  
Trace Elements ◽  
Coal Combustion ◽  
Power Plants ◽  
Thermal Power ◽  
Industrial Sector ◽  
Air Pollution Control ◽  
Atmospheric Emissions ◽  
Economic Sectors ◽  
Coal Consumption ◽  
Hazardous Trace Elements

Abstract. Emissions of hazardous trace elements in China are of great concern because of their negative impacts on local air quality as well as on regional environmental health and ecosystem risks. In this paper, the atmospheric emissions of mercury (Hg), arsenic (As), and selenium (Se) from coal combustion in China for the period 1980–2007 are estimated on the basis of coal consumption data and emission factors, which are specified by different categories of combustion facilities, coal types, and the equipped air pollution control devices configuration (Dust collectors, FGD, etc.). Specifically, multi-year emission inventories of Hg, As, and Se from 30 provinces and 4 economic sectors (thermal power, industry, residential use, and others) are evaluated and analyzed in detail. Furthermore, the gridded distribution of provincial-based Hg, As, and Se emissions in 2005 at a resolution of 1°×1° is also plotted. It shows that the calculated national total atmospheric emissions of Hg, As, and Se from coal combustion have rapidly increased from 73.59 t, 635.57 t, and 639.69 t in 1980 to 305.95 t, 2205.50 t, and 2352.97 t in 2007, at an annually averaged growth rate of 5.4%, 4.7%, and 4.9%, respectively. The industrial sector is the largest source for Hg, As, and Se, accounting for about 50.8%, 61.2%, and 56.2% of the national totals, respectively. The share of power plants is 43.3% for mercury, 24.9% for arsenic, and 33.4% for selenium, respectively. Also, it shows remarkably different regional contribution characteristics of these 3 types of trace elements, the top 5 provinces with the heaviest mercury emissions in 2007 are Shandong (34.40 t), Henan (33.63 t), Shanxi (21.14 t), Guizhou (19.48 t), and Hebei (19.35 t); the top 5 provinces with the heaviest arsenic emissions in 2007 are Shandong (219.24 t), Hunan (213.20 t), Jilin (141.21 t), Hebei (138.54 t), and Inner Mongolia (127.49 t); while the top 5 provinces with the heaviest selenium emissions in 2007 are Shandong (289.11 t), Henan (241.45 t), Jiangsu (175.44 t), Anhui (168.89 t), and Hubei (163.96 t). Between 2000 and 2007, provinces always rank at the top five largest Hg, As, and Se emission sources are: Shandong, Hebei, Shanxi, Henan, and Jiangsu, most of which are located in the east and are traditional industry-based or economically energy intensive areas in China. Notably, Hg, As, and Se emissions from coal combustion in China begin to grow at a more moderate pace since 2005. Emissions from coal-fired power plants sector began to decrease though the coal use had been increasing steadily, which can be mainly attributed to the more and more installation of WFGD in power plants, thus the further research and control orientations of importance for these hazardous trace elements should be the industrial sector.

Performance Analyze of Ultra-Low Emission of Thermal Power Generation Based on Multi-Objective Optimization

2016 ◽  
Author(s):  
Xiaoen Li ◽  
Ningling Wang ◽  
Yumeng Zhang ◽  
Yongping Yang
Keyword(s):  
Power Plant ◽  
Environmental Impact ◽  
Thermal Power ◽  
Weighting Factor ◽  
Pollutant Emission ◽  
Support Vector ◽  
Total System ◽  
Multi Objective Optimization ◽  
Coal Consumption ◽  
Multi Objective

The present study deals with a multi-objective optimization problem on design condition. A multi-objective algorithm model is established to weigh up the relationship between coal consumption rate and environmental impact of pollutant. A simulated thermodynamic system model of traditional supercritical coal-fired units coupled with environment protect equipment is designed on the platform of Ebsilon. The environmental impact, which consist of the pollutant emission of NOx, SOx and dust, is acquired with the help of support vector machine (SVM) from the historical record of that power plant. The restriction of pollutant emission in Chinese newly policy is taken into account to determine the weighting factor. By considering energy and environment as the multi-objective, the simulation, which evaluates the solutions by interfacing with the programmed optimization algorithm, is developed. And corresponding total system performance and characteristic of pollutant emission in flue gas is derived. The result show that the performance of system and environment protect equipment will be influenced as boundary conditions changed. Coal consumption around 290g/kWh and 292g/kWh can reach minimum environmental impact in the case of our testing power plant.

The Ocean as a Renewable Source of Energy

1975 ◽  
Vol 97 (3) ◽  
pp. 897-908 ◽  
Author(s):  
O. M. Griffin
Keyword(s):  
Power Generation ◽  
Research And Development ◽  
Power Plants ◽  
Renewable Energy Sources ◽  
Thermal Power ◽  
Tidal Power ◽  
Power Sources ◽  
Energy Needs ◽  
Tidal Power Generation ◽  
Power Generation Systems

The oceans and their environment have long been envisioned as renewable sources of energy. It is the purpose of this paper to assess the feasibility of drawing on the sea for power and to determine the extent to which the oceans are likely to serve future energy needs. A review is made of recent U. S. funding levels for the research and development of renewable energy sources during the fiscal years 1971–1975, and a study is made of the technical and environmertal acceptability status of tidal, wind, and sea thermal power generation systems. The estimated costs of these environmental power sources are compared with the prevailing power costs for nuclear and coal plants. On the basis of these comparisons, recommendations are made for a program of research and development culminating in the construction of prototype plants for wind and sea thermal power plants. Tidal power generation is found to be technically feasible but economically uninviting at present.

scholarly journals Chinese National Condition Based Power Dispatching Optimization in Microgrids

2018 ◽  
Vol 2018 ◽  
pp. 1-11
Author(s):  
Gang Chen ◽  
Jian-Ming Wang ◽  
Xiao-Dong Yuan ◽  
Liang Chen ◽  
Lu-Jia Zhao ◽  
...  
Keyword(s):  
Normal Condition ◽  
Power Plants ◽  
Thermal Power ◽  
Weather Condition ◽  
Weather Conditions ◽  
Pso Algorithm ◽  
Coal Consumption ◽  
New Energy ◽  
Weighted Factor ◽  
Power Dispatching

This paper proposed a study on the power dispatching optimization in the microgrid aiming at Chinese national condition based on PSO algorithm. The whole work is on the basis of the weighted factor variation of the objective function due to different weather conditions. Three cases including the good contamination-diffusing weather condition, the smog weather condition, and the normal condition are considered, respectively. In the case of smog weather, the new energy generation and the battery system will be all out to use as less power as possible from the primary grid so that the pollution produced by coal consumption in the thermal power plants can be upmost reduced. However, in the case of perfect contamination-diffusing weather, the battery is not used to reserve its lifetime, while a large amount of exchanged power from the primary grid is used to obtain a most economic-efficient effect. In normal condition, the power dispatching is performed in a most balanced way considering not only the cost but also the environmental management. The case study in Suzhou Industrial Part confirms the effectiveness of the proposed method in this paper.

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