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Article
Publication date: 16 November 2020

Soudamini Behera, Sasmita Behera, Ajit Kumar Barisal and Pratikhya Sahu

Dynamic economic and emission dispatch (DEED) aims to optimally set the active power generation with constraints in a power system, which should target minimum operation…

Abstract

Purpose

Dynamic economic and emission dispatch (DEED) aims to optimally set the active power generation with constraints in a power system, which should target minimum operation cost and at the same time minimize the pollution in terms of emission when the load dynamically changes hour to hour. The purpose of this study is to achieve optimal economic and emission dispatch of an electrical system with a renewable generation mix, consisting of 3-unit thermal, 2-unit wind and 2-unit solar generators for dynamic load variation in a day. An improved version of a simple, easy to understand and popular optimization algorithm particle swarm optimization (PSO) referred to as a constriction factor-based particle swarm optimization (CFBPSO) algorithm is deployed to get optimal solution as compared to PSO, modified PSO and red deer algorithm (RDA).

Design/methodology/approach

Different model with and without wind and solar power generating systems; with valve point effect is analyzed. The thermal generating system (TGs) are the major green house gaseous emission producers on earth. To take up this ecological issue in addition to economic operation cost, the wind and solar energy sources are integrated with the thermal system in a phased manner for electrical power generation and optimized for dynamic load variation. This DEED being a multi-objective optimization (MO) has contradictory objectives of fuel cost and emission. To get the finest combination of the two objectives and to get a non-dominated solution the fuzzy decision-making (FDM) method is used herein, the MO problem is solved by a single objective function, including min-max price penalty factor on emission in the total cost to treat as cost. Further, the weight factor accumulation (WFA) technique normalizes the pair of objectives into a single objective by giving each objective a weightage. The weightage is decided by the FDM approach in a systematic manner from a set of non-dominated solutions. Here, the CFBPSO algorithm is applied to lessen the total generation cost and emission of the thermal power meeting the load dynamically.

Findings

The efficacy of the contribution of stochastic wind and solar power generation with the TGs in the dropping of net fuel cost and emission in a day for dynamic load vis-à-vis the case with TGs is established.

Research limitations/implications

Cost and emission are conflicting objectives and can be handled carefully by weight factors and penalty factors to find out the best solution.

Practical implications

The proposed methodology and its strategy are very useful for thermal power plants incorporating diverse sources of generations. As the execution time is very less, practical implementation can be possible.

Social implications

As the cheaper generation schedule is obtained with respect to time, cost and emission are minimized, a huge revenue can be saved over the passage of time, and therefore it has a societal impact.

Originality/value

In this work, the WFA with the FDM method is used to facilitate CFBPSO to decipher this DEED multi-objective problem. The results reveal the competence of the projected proposal to satisfy the dynamic load demand and to diminish the combined cost in contrast to the PSO algorithm, modified PSO algorithm and a newly developed meta-heuristic algorithm RDA in a similar system.

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Article
Publication date: 7 September 2015

Mika Goto and Toshiyuki Sueyoshi

The purpose of this study is to review the current status and related issues on the market reform of Japanese electric power industry after Fukushima Daiichi nuclear plant…

Abstract

Purpose

The purpose of this study is to review the current status and related issues on the market reform of Japanese electric power industry after Fukushima Daiichi nuclear plant disaster. We also discuss the future policy direction for the market reform.

Design/methodology/approach

This research compares the reform process of Japanese electric power industry with that of European Union (EU) nations. Then, this study discusses policy issues on the Japanese market reform based upon our comparative analysis.

Findings

Japan may learn many things from the market liberalization process and institution of EU nations. In the learning process, it is necessary to pay attention to industrial differences between Japan and the EU nations. Each country has its own unique features on fuel mix, business environment as well as supply and demand relationship. Such differences may influence a desirable policy direction for each nation’s market reform. The international comparison discussed in this study indicates the importance of a step-by-step approach in which Japan can gradually incorporate European experiences into the Japanese market reform.

Research limitations/implications

Since this study focuses upon the Japanese market reform, the empirical findings may have limited policy implications. The implications obtained from Japanese experience need additional thought in shifting them to other nations. Such an extension will be an important future task of this study.

Originality/value

This study discusses the current policy issues and future direction on the Japanese electricity market reform. This study also suggests its future direction. Previous research has never discussed the Japanese experience. Policy makers, corporate leaders, and individuals in the world, who are involved in the energy industry, have been paying attention to the Japanese future energy direction after Fukushima Daiichi nuclear plant disaster. This study provides such a future energy direction on Japanese market reform from European experience.

Details

International Journal of Energy Sector Management, vol. 9 no. 3
Type: Research Article
ISSN: 1750-6220

Keywords

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Article
Publication date: 1 January 2013

Z.Q. Zhu and Jiabing Hu

Wind energy has matured to a level of development at which it is ready to become a generally accepted power generation technology. The aim of this paper is to provide a…

Abstract

Purpose

Wind energy has matured to a level of development at which it is ready to become a generally accepted power generation technology. The aim of this paper is to provide a brief review of the state of the art in the area of electrical machines and power‐electronic systems for high‐power wind energy generation applications. As the first part of this paper, latest market penetration, current technology and advanced electrical machines are addressed.

Design/methodology/approach

After a short description of the latest market penetration of wind turbines with various topologies globally by the end of 2010 is provided, current wind power technology, including a variety of fixed‐ and variable‐speed (in particular with doubly‐fed induction generator (DFIG) and permanent magnet synchronous generator (PMSG) supplied with partial‐ and full‐power converters, respectively) wind power generation systems, and modern grid codes, is presented. Finally, four advanced electrical‐machine systems, viz., brushless DFIG, open winding PMSG, dual/multi 3‐phase stator‐winding PMSG and magnetic‐gear outer‐rotor PMSG, are identified with their respective merits and challenges for future high‐power wind energy applications.

Findings

For the time being, the gear‐drive DFIG‐based wind turbine is significantly dominating the markets despite its defect caused by mechanical gears, slip rings and brush sets. Meanwhile, direct‐drive synchronous generator, especially utilizing permanent magnets on its rotor, supplied with a full‐capacity power converter has become a more effective solution, particularly in high‐power offshore wind farm applications.

Originality/value

This first part of the paper reviews the latest market penetration of wind turbines with a variety of mature topologies, by summarizing their advantages and disadvantages. Four advanced electrical‐machine systems are selected and identified by distinguishing their respective merits and challenges for future high‐power wind energy applications.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, vol. 32 no. 1
Type: Research Article
ISSN: 0332-1649

Keywords

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Article
Publication date: 28 June 2011

Anurag K. Srivastava, Sukumar Kamalasadan, Daxa Patel, Sandhya Sankar and Khalid S. Al‐Olimat

The electric power industry has been moving from a regulated monopoly structure to a deregulated market structure in many countries. The purpose of this study is to…

Abstract

Purpose

The electric power industry has been moving from a regulated monopoly structure to a deregulated market structure in many countries. The purpose of this study is to comprehensively review the existing markets to study advantages, issues involved and lessons learnt to benefit emerging electricity markets.

Design/methodology/approach

The paper employs a comprehensive review of existing competitive electricity market models in USA (California), UK, Australia, Nordic Countries (Norway), and developing country (Chile) to analyze the similarities, differences, weaknesses, and strengths among these markets based on publically available data, literature review and information.

Findings

Ongoing or forthcoming electricity sector restructuring activities in some countries can be better designed based on lessons learnt from existing markets and incorporating their own political, technical and economical contexts. A template for design of successful electricity market has also been presented.

Research limitations/implications

This study is limited to a comparative analysis of five markets and can be extended in the future for other existing and emerging electricity markets.

Practical implications

The discussed weaknesses and strengths of existing electricity markets in this study can be practically utilized to improve the electricity industry market structures leading to several social benefits including lower electricity cost.

Originality/value

The comprehensive review and analysis of five existing markets, physically located in different continents, may be used as an assistance or reference guide to benefit the emerging electricity markets in other countries.

Details

International Journal of Energy Sector Management, vol. 5 no. 2
Type: Research Article
ISSN: 1750-6220

Keywords

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Article
Publication date: 21 November 2018

Deepak Kumar, Yajvender Pal Verma and Rintu Khanna

Technological development has not only helped in effective integration of renewable sources but also made it possible for consumers to participate in system operation…

Abstract

Purpose

Technological development has not only helped in effective integration of renewable sources but also made it possible for consumers to participate in system operation. Different market players are coming up in the electricity market, microgrid being one of them. Thus, this paper aims to investigate consumers’ role in the dispatch of a microgrid system that has a hybrid market structure under varied system conditions.

Design/methodology/approach

The mathematical model developed has been solved by the CONOPT solver in the GAMS optimization tool. GAMS-MATLAB interfacing is done to obtain solutions.

Findings

The problem formulated shows the effect of consumers in dispatch and overall operational cost. Consumers’ participation has been proposed through a quadratic cost function. The system operation under pool and bilateral contracts has been investigated. It shows that proper incentives to the consumers can help in reduction and effective management of the demand, carbon emission and overall system operational cost.

Originality/value

This paper considers the hybrid market structure to find the load dispatch in a microgrid system. The participation of consumers in the microgrid system has been implemented considering variations in wind power, solar power and load. The power exchange between the grid and microgrid system has been modeled showing the contribution of the consumers in system operation.

Details

International Journal of Energy Sector Management, vol. 13 no. 2
Type: Research Article
ISSN: 1750-6220

Keywords

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Article
Publication date: 1 January 2013

Z.Q. Zhu and Jiabing Hu

Power‐electronic systems have been playing a significant role in the integration of large‐scale wind turbines into power systems due to the fact that during the past three…

Abstract

Purpose

Power‐electronic systems have been playing a significant role in the integration of large‐scale wind turbines into power systems due to the fact that during the past three decades power‐electronic technology has experienced a dramatic evolution. This second part of the paper aims to focus on a comprehensive survey of power converters and their associated control systems for high‐power wind energy generation applications.

Design/methodology/approach

Advanced control strategies, i.e. field‐oriented vector control and direct power control, are initially reviewed for wind‐turbine driven doubly fed induction generator (DFIG) systems. Various topologies of power converters, comprising back‐to‐back (BTB) connected two‐ and multi‐level voltage source converters (VSCs), BTB current source converters (CSCs) and matrix converters, are identified for high‐power wind‐turbine driven PMSG systems, with their respective features and challenges outlined. Finally, several control issues, viz., basic control targets, active damping control and sensorless control schemes, are elaborated for the machine‐ and grid‐side converters of PMSG wind generation systems.

Findings

For high‐power PMSG‐based wind turbines ranging from 3 MW to 5 MW, parallel‐connected 2‐level LV BTB VSCs are the most cost‐effective converter topology with mature commercial products, particularly for dual 3‐phase stator‐winding PMSG generation systems. For higher‐capacity wind‐turbine driven PMSGs rated from 5 MW to 10 MW, medium voltage multi‐level converters, such as 5‐level regenerative CHB, 3‐ and 4‐level FC BTB VSC, and 3‐level BTB VSC, are preferred. Among them, 3‐level BTB NPC topology is the favorite with well‐proven technology and industrial applications, which can also be extensively applicable with open‐end winding and dual stator‐winding PMSGs so as to create even higher voltage/power wind generation systems. Sensorless control algorithms based on fundamental voltages/currents are suggested to be employed in the basic VC/DPC schemes for enhancing the robustness in the entire PMSG‐based wind power generation system, due to that the problems related with electromagnetic interferences in the position signals and the failures in the mechanical encoders can be avoided.

Originality/value

This second part of the paper for the first time systematically reviews the latest state of arts with regard to power converters and their associated advanced control strategies for high‐power wind energy generation applications. It summarizes a variety of converter topologies with pros and cons highlighted for different power ratings of wind turbines.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, vol. 32 no. 1
Type: Research Article
ISSN: 0332-1649

Keywords

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Article
Publication date: 8 February 2016

A. Azadeh, S. Motevali Haghighi, M. Hosseinabadi Farahani and R. Yazdanparast

Concern for health, safety and environment (HSE) is increasing in many developing countries, especially in energy industries. Improving power plants efficiencies in terms…

Abstract

Purpose

Concern for health, safety and environment (HSE) is increasing in many developing countries, especially in energy industries. Improving power plants efficiencies in terms of HSE issues requires considering these issues in performance assessment of power generation units. This study aims to discuss the use of data envelopment analysis methodology for the performance assessment of electrical power plants in Iran by considering HSE and conventional indicators.

Design/methodology/approach

Installed capacity, fuel consumption, labor cost, internal power, forced outage hours, operating hours and total power generation along with HSE indices are taken into consideration for determining the efficiency of 20 electric power plants or decision-making units (DMUs). Moreover, DMUs are ranked based on their relative efficiency scores.

Findings

Results show that HSE factors are significant in performance assessment of the power plants studied in this research, and among HSE factors, health has the most powerful impact on the efficiency of the power plants.

Originality/value

The approach of this study could be used for continuous improvement of combined HSE and conventional factors. It would also help managers to have better comprehension of key shaping factors in terms of HSE.

Details

World Journal of Engineering, vol. 13 no. 1
Type: Research Article
ISSN: 1708-5284

Keywords

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Book part
Publication date: 19 May 2009

Mika Goto and Anil K. Makhija

We present empirical evidence on the productive efficiency of electric utilities in the United States from 1990 to 2004. This period is marked by major attempts to…

Abstract

We present empirical evidence on the productive efficiency of electric utilities in the United States from 1990 to 2004. This period is marked by major attempts to introduce deregulation with an expectation that it will lead to improved operating efficiency and ultimately to lower consumer prices. However, relying on improved techniques of estimating productive efficiency, we find that firms in jurisdictions that adopted deregulation have in fact lower productive efficiency, and have also experienced decreases in efficiency over time. In particular, the vertical separation of generation, a hallmark of an effort to deregulate the industry, is associated with an adverse impact on productive efficiency.

Details

Corporate Governance and Firm Performance
Type: Book
ISBN: 978-1-84855-536-5

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Article
Publication date: 29 April 2014

Ardavan Dargahi, Stéphane Ploix, Alireza Soroudi and Frédéric Wurtz

The use of energy storage devices helps the consumers to utilize the benefits and flexibilities brought by smart networks. One of the major energy storage solutions is…

Abstract

Purpose

The use of energy storage devices helps the consumers to utilize the benefits and flexibilities brought by smart networks. One of the major energy storage solutions is using electric vehicle batteries. The purpose of this paper is to develop an optimal energy management strategy for a consumer connected to the power grid equipped with Vehicle-to-Home (V2H) power supply and renewable power generation unit (PV).

Design/methodology/approach

The problem of energy flow management is formulated and solved as an optimization problem using a linear programming model. The total energy cost of the consumer is optimized. The optimal values of decision variables are found using CPLEX solver.

Findings

The simulation results demonstrated that if the optimal decisions are made regarding the V2H operation and managing the produced power by solar panels then the total energy payments are significantly reduced.

Originality/value

The gap that the proposed model is trying to fill is the holistic determination of an optimal energy procurement portfolio by using various embedded resources in an optimal way. The contributions of this paper are in threefold as: first, the introduction of mobile storage devices with a periodical availability depending on driving schedules; second, offering a new business model for managing the generation of PV modules by considering the possibility of grid injection or self-consumption; third, considering Real Time Pricing in the suggested formulation.

Details

COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering, vol. 33 no. 3
Type: Research Article
ISSN: 0332-1649

Keywords

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Article
Publication date: 31 May 2013

Han Jinshan and Tong Tong

The purpose of this paper is to analyze the changing trend of China's power project investment value.

Abstract

Purpose

The purpose of this paper is to analyze the changing trend of China's power project investment value.

Design/methodology/approach

The authors research the profitability of different power projects in recent years and summarize the reason why investment value varies between different power projects. To achieve this, the empirical study developed a fixed effect model in panel data analysis to investigate the impacts that different power projects made to company value. The data were collected from annual financial reports of 30 Chinese power listed companies from 2007 to 2011.

Findings

This paper indicates three changes in investment value of China's electricity industry: the electricity industry in China is of investment prospects; the investment value of fuel power projects in China is less and less; and projects around electric power load center are more preferable than those built in other areas. It suggests that it is the resource factors, environment factors, investment policies and conditions, not the power unit itself, that determine the investment value of different power projects in China.

Originality/value

This paper analyzes the formation reason of current power investment situation combining China's actual conditions. This study fulfils an identified need to research the changing trend of China's power project investment value and generalize the influencing factors of investment value.

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