scholarly journals A Multiobjective Robust Scheduling Optimization Mode for Multienergy Hybrid System Integrated by Wind Power, Solar Photovoltaic Power, and Pumped Storage Power

2017 ◽  
Vol 2017 ◽  
pp. 1-15 ◽  
Author(s):  
Lihui Zhang ◽  
He Xin ◽  
Jing Wu ◽  
Liwei Ju ◽  
Zhongfu Tan
Keyword(s):  
Wind Power ◽  
Hybrid System ◽  
Supply And Demand ◽  
Stochastic Theory ◽  
Stochastic Scheduling ◽  
Economic Benefits ◽  
Load Curve ◽  
Scheduling Optimization ◽  
Pumped Storage ◽  
Photovoltaic Generators

Wind power plant (WPP), photovoltaic generators (PV), cell-gas turbine (CGT), and pumped storage power station (PHSP) are integrated into multienergy hybrid system (MEHS). Firstly, this paper presents MEHS structure and constructs a scheduling model with the objective functions of maximum economic benefit and minimum power output fluctuation. Secondly, in order to relieve the uncertainty influence of WPP and PV on system, robust stochastic theory is introduced to describe uncertainty and propose a multiobjective stochastic scheduling optimization mode by transforming constraint conditions with uncertain variables. Finally, a 9.6 MW WPP, a 6.5 MW PV, three CGT units, and an upper reservoir with 10 MW·h equivalent capacity are chosen as simulation system. The results show MEHS system can achieve the best operation result by using the multienergy hybrid generation characteristic. PHSP could shave peak and fill valley of load curve by optimizing pumping storage and inflowing generating behaviors based on the load supply and demand status and the available power of WPP and PV. Robust coefficients can relieve the uncertainty of WPP and PV and provide flexible scheduling decision tools for decision-makers with different risk attitudes by setting different robust coefficients, which could maximize economic benefits and minimize operation risks at the same time.

Cost advantage of adjustable-speed pumped storage unit for daily operation in distributed hybrid system

2021 ◽  
Author(s):  
Chen Feng ◽  
Yuan Zheng ◽  
Chaoshun Li ◽  
Zijun Mai ◽  
Wei Wu ◽  
...  
Keyword(s):  
Hybrid System ◽  
Cost Advantage ◽  
Storage Unit ◽  
Adjustable Speed ◽  
Pumped Storage

scholarly journals Optimal operation of a pumped-storage hydro plant that compensates the imbalances of a wind power producer

2011 ◽  
Vol 81 (9) ◽  
pp. 1767-1777 ◽  
Author(s):  
Álvaro Jaramillo Duque ◽  
Edgardo D. Castronuovo ◽  
Ismael Sánchez ◽  
Julio Usaola
Keyword(s):  
Wind Power ◽  
Optimal Operation ◽  
Pumped Storage

Studies on Power Distribution of AC and VSC-HVDC Hybrid System for Wind Power Integration

2013 ◽  
Vol 676 ◽  
pp. 204-208 ◽  
Author(s):  
Yue Qiang Zhang ◽  
Yong Qiang Zhu ◽  
Yan Zhang Liu
Keyword(s):  
Wind Power ◽  
Hybrid System ◽  
Power Distribution ◽  
Power Loss ◽  
Reactive Power ◽  
Good Method ◽  
Transmission Capacity ◽  
Distribution Strategy ◽  
Wind Power Integration ◽  
Set Up

In order to study the power distribution strategy of AC and VSC-HVDC hybrid system for wind power integration, a strategy based on improving the transmission capacity of AC lines and reducing the power loss is proposed. By use of the decouple control of active and reactive power of the VSC-HVDC, the transmission capacity of the AC lines can be improved by absorbing enough reactive power, AC lines have the priority before they have reached their transmission limit, meanwhile the VSC-HVDC acts as STATCOM. When the AC lines have been fully used, the VSC-HVDC will act as STATCOM as well as transmit the rest power. A DFIG wind power integration system is set up by use of PSCAD/EMTDC, the simulation results show that the power distribution strategy can realize the wind power integration successfully and reduce the power loss, it can regard as a good method for wind power integration.

Growth prospects, market challenges and policy measures: evolution of mobile broadband in Pakistan

2018 ◽  
Vol 20 (1) ◽  
pp. 42-61 ◽  
Author(s):  
Muhammad Shehzad Hanif ◽  
Shao Yunfei ◽  
Muhammad Imran Hanif
Keyword(s):  
Developing Country ◽  
Service Providers ◽  
Supply And Demand ◽  
Economic Benefits ◽  
Content Type ◽  
Mobile Broadband ◽  
Broadband Service ◽  
Policy Measures ◽  
The Government

Purpose The paper aims to explore the long-term prospects of mobile broadband adoption in a developing country. The supply-side and demand-side policy measures are recommended to counter the challenges to broadband adoption. Design/methodology/approach Methodologically, this study uses document analysis to explain secondary data including growth statistics, trade literature and previous scholarly research. Based on the growth statistics of broadband and the informed market insights, the research discusses the prevailing market threats and recommends counter measures to improve the long-term prospects of broadband propagation. Findings The growth of mobile broadband is settling down in Pakistan due to various barriers like cost, literacy, security and unavailability of local content. Collaborative efforts are required by the government, the service providers and the people to enhance the adoption of broadband service and secure economic benefits of the broadband. Practical implications The research offers useful implications for managers and policymakers in Asian and African developing countries; the policy measures discussed here may serve as guidelines for them in the design of their own policies regarding broadband supply and demand. Originality/value The study makes an effort to examine the broadband growth in a developing country on the basis of both quantitative and qualitative aspects. The research endeavors to fill the gap on the particular scholarship of research covering potential uptake of broadband services and the effects of constraining elements to broadband adoption in a developing country.

Intelligent Optimization of Hybrid Wind/PV/pumped-Storage Power System

2012 ◽  
Vol 512-515 ◽  
pp. 719-722
Author(s):  
Yan Ren ◽  
Yuan Zheng ◽  
Chong Li ◽  
Bing Zhou ◽  
Zhi Hao Mao
Keyword(s):  
Global Optimization ◽  
Particle Swarm Optimization ◽  
Power System ◽  
Hybrid System ◽  
Optimization Algorithm ◽  
Particle Swarm Optimization Algorithm ◽  
Particle Swarm ◽  
Swarm Optimization ◽  
Good Convergence ◽  
Pumped Storage

The hybrid wind/PV/pumped-storage power system was the hybrid system which combined hybrid wind/PV system and pumped-storage power station. System optimization was very important in the system design process. Particle swarm optimization algorithm was a stochastic global optimization algorithm with good convergence and high accuracy, so it was used to optimize the hybrid system in this paper. First, the system reliability model was established. Second, the particle swarm optimization algorithm was used to optimize the system model in Nanjing. Finally, The results were analyzed and discussed. The optimization results showed that the optimal design method of wind/PV/pumped-storage system based on particle swarm optimization could take into account both the local optimization and the global optimization, which has good convergence high precision. The optimal system was that LPSP (loss of power supply probability) was zero.

scholarly journals Frequency Support Markets and Wind Power Integration

Energies ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 7450
Author(s):  
Anzhelika Ivanova ◽  
José Luis Domínguez-García ◽  
Cristina Corchero
Keyword(s):  
Wind Power ◽  
Electricity Markets ◽  
Power Plants ◽  
Economic Benefits ◽  
Ancillary Services ◽  
Renewable Sources ◽  
Wind Generators ◽  
Wind Power Plants ◽  
Market Practices ◽  
System Benefit

Europe’s initiative to reduce the emissions of harmful gases has significantly increased the integration of renewable sources into power networks, particularly wind power. Variable renewable sources pose challenges to sustain the balance between generation and demand. Thus, the need for ancillary services to cope with this problem has increased. In this regard, the integration of larger shares of wind generation would have a clear system benefit when wind generators are able to provide these ancillary services. This would also have implications for electricity markets, enabling these services from wind power plants. This article gives an overview of several European markets for frequency support (FS) services, also referred to as FS markets. It identifies the changes in national regulations of 10 European countries to standardize these services based on the ENTSO-E guidelines. However, most of the countries still use their national service definitions, which presents a problem for researchers to understand the national regulations in relation to the ENTSO-E guidelines. This article provides a classification of the national FS services under the definitions of the ENTSO-E guidelines to facilitate research on this topic. Furthermore, it highlights the main requirements for the market practices that would encourage the participation of wind power generation in the provision of these services. An estimation of the economic benefits for wind producers from the provision of FS services is provided as well to show a possible outcome if changes are not made in national policies.

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