Jiefeng Hu, Josep M. Guerrero, Syed Zahurul Islam · Institution of Engineering and Technology eBooks · 2021
Chapter Contents: 3.1 Distributed generation 3.2 Wind power generation 3.2.1 Wind turbine characteristics 3.2.2 Constant speed constant frequency system 3.2.3 VSCF system 3.2.3.1 Wound field synchronous generator 3.2.3.2 Permanent-magnet synchronous generator 3.2.3.3 Doubly fed induction generator 3.2.3.4 Squirrel cage induction generator 3.2.4 Recent advances in wind power generation 3.3 Solar PVs generation 3.3.1 Principle and configuration of PV systems 3.3.2 Power converters and recent advance of MPC for PV systems 3.3.2.1 Single-phase single-stage 3.3.2.2 Single-phase multiple-stage 3.3.2.3 Three-phase single-stage 3.3.2.4 MPPT control of PV system 3.3.2.5 Grid-side inverter control of PV system References Further reading
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B. Lasseter · 2001 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.01CH37194) · 2001
Environmentally friendly renewable energy technologies such as photovoltaics and clean, efficient, fossil-fuels technologies such as micro-turbines and fuel cells are among new generating systems driving the demand for distributed generation of electricity. If combined heat and power at residential industrial plants or commercial buildings can be achieved the efficiencies can be higher than conventional central generation plants. The smallness of these new distributed generation along with the low voltages at the interface create a new class of problems which requires innovative approaches to managing and operating the distributed resources. One such concept is the microgrid.
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2013
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2014
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Moses Jeremiah Barasa Kabeyi · 2023
Distributed energy systems (DES) have significant potential to enhance sustainability of electricity systems.Decentralized generation systems are small-scale power technologies generally ranging between 3 kW-10 MW located very close to consumers to provide an alternative or enhancement to the centralized or conventional power system.The DGs are connected directly to the distribution system or on the customer side of the meter which significantly reduces the.transmission and distribution losses of the power system.The high consumption of fossil fuels and global commitments to reduction in energy related emissions has generated huge interest in renewable energy resources for use in power generation.This has increased the opportunities of utilizing decentralist generation systems in power generation.The renewable DG systems may be connected to the grid for peak shaving or as a stand-alone system to serve a particular load or an area.Integrating renewable DGs to the power system has many benefits as well as threats if not well coordinated and integrated into the power system.High penetration of renewables can cause several adverse effects on the distribution systems.like voltage rise, reverse power flow, high line losses, creation of harmonics and reduction in voltage quality.Decentralized power systems units should be designed and operated within limits to maintain optimal quality of the power system There is therefore need for optimal sizing and location of renewable decentralized generation (DG) units in the distribution power system for technical and economic benefits.The penetration of renewable decentralized generation systems is considered as a significant contribution to the world energy and environmental crisis
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S Szewczuk · 2008
At present, the bulk of the worldʼs electricity is generated in central power stations. This approach, one of ʻeconomy of sizeʼ, generates electricity in large power stations and delivers it to load centres via an extensive network of transmission and distribution lines. An alternative approach, that of distributed generation,
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Ali Ahmad · World Bank, Washington, DC eBooks · 2020
This report describes the current state of play in the private diesel generation business and assesses how to invest in and create new markets for private sector participation within the green energy sector.
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2018
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Ilieva, Mila · 2020
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Fraunhofer-Publica (Fraunhofer-Gesellschaft) · 2008
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Mohd Hanaffi, Yaa'kob · UMP Institutional Repository (Universiti Malaysia Pahang) · 2010
In order to reduce electricity cost, together with improving the performance of distribution systems, it has to deal with the problem of power losses minimisation. Although losses in the system can never be entirely eliminated, they can be controlled and minimised in several ways for example by installing Distributed Generation (DG) and shunt capacitor. DG can reduce line losses, increase system voltage profile, and improve power quality of the system. The shunt capacitor can be improving the power factor if the installation DG affects the power factor of network system. In this thesis, the proposed method is tested on standard IEEE 14 bus system and the results of the simulation carried out using MATLAB. While, DIgSILENT software was used to simulate the 26-bus test system by. By adding the DG, the losses of the system will be reducing while it can stabilize the network system. Therefore, distributed generation has improved the overall system performance.
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Ali Ahmad · RePEc: Research Papers in Economics
Energy-Electric Power Energy-Energy Demand Energy-Energy Markets Energy-Energy Policies & Economics Energy-Power & Energy Conversion Energy-Renewable Energy Energy-Solar Energy
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A. V. Bessmertnykh, В. М. Зайченко · Herald of the Russian Academy of Sciences · 2012
Having analyzed the technical and economic performance of new energy technologies, the authors prove that the use of local energy resources, such as wood, agricultural waste, and peat is a priority in the development of distributed generation in Russia.
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Thomas Basso · AccessScience · 2015
AccessScience is an authoritative and dynamic online resource that contains incisively written, high-quality educational material covering all major scientific disciplines. An acclaimed gateway to scientific knowledge, AccessScience is continually expanding the ways it can demonstrate and explain core, trustworthy scientific information that inspires and guides users to deeper knowledge.
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Navarrete Pablo-Romero, Javier · KTH Publication Database DiVA (KTH Royal Institute of Technology) · 2012
Wind power often is a source of voltage fluctuations and possible voltage issues are raised when considering interconnecting wind turbines to an electric grid. Also, the power electronics introduced in the wind turbines might insert more fluctuations and different PQ problems. Distributed generation seems to be a good option in order to try to mitigate these problems. The first goal of the work is to create a model of a small electric grid, using MATLAB/Simulink. The models aims to simulate various DFIG wind turbines coupled to the grid in different conditions of location and wind. Then, the main objective is to analyze the PQ in the grid with this type of turbine. For this, once the simulations have been done, the results obtained have allowed calculating different indices to study PQ in the model. Afterwards, a comparison of those indices in the different conditions is made.
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2013
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Eberhard Waffenschmidt · Lecture notes in energy · 2022
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Julian Meng · 2004
A distributed power generation system (DPGS) consists of a number of small-scale power generation sources (SSPGS) that provide electric power at a site closer to the user than the central power generation station. Small-scale power generation technologies currently available include wind turbines, fuel cells, micro gas/diesel turbines, small hydro generators and photovoltaic panels. Currently, most SSPGSs are locally controlled and optimized without any consideration for the large area requirements. Therefore, in order to achieve the full potential of a distributed power system, the individual power generators that form the grid-connected distributed network need to be effectively integrated as a whole. A cost effective and deployable communications system is required to provide data links between the remote power generators and the central station. This paper will discuss current data communication technologies that could be used to formulate this distributed power generation communication system.
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H. Lee Willis, Walter G. Scott · 2018
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Abbott, Stephen · OpenGrey (Institut de l'Information Scientifique et Technique) · 2013
Migrating from a legacy network, designed for centralised power production and control, to a network topology which allows for the integration of central and distributed generation has many challenges, The evolution of the network has to overcome the problems associated with integration of distributed generation (DG), These problems include the management of the network's voltage, reactive and active power flows, fault current, power quality and voltage stability issues, In this thesis a solution to the voltage control issue using reactive power dispatched from distributed generation is explored, This study predominantly presents a novel coordinate control stratagem utilising a sensitivity control algorithm to dispatch reactive power from distributed generation, The control stratagem is demonstrated on a balanced version of the IEEE 13 bus feeder, where it is shown to not only have the capability to maintain network voltages within the statutory limits, but also to reduce the requirement for network reinforcement and allow for greater accommodation of further distributed generation, The physical differences of unbalanced networks, and thus the requirement for an enhanced unbalanced controller, are presented for the unbalanced IEEE 13 node test feeder and Scottish and Southern Energy's We stray network. It is noted that unbalanced networks need to establish reactive power support for individual phases to ensure that networks operate within unbalanced limits, This is particularly necessary when stochastic generation is accommodated on the network. Proposals are presented for the connection of dynamic var (DVAr) compensation to ensure that the voltage imbalances, which will occur due to the connection of the proposed DG on the Westray system, are within the network requirements, It is also shown that the need for DVAr support can be elevated if the closure of the open point is allowed and the control strategy is utilised, From this work it is envisaged that dispatching reactive power from distributed generation could form an integral part of future networks if they too are operated effectively, efficiently and within voltage limitations, To allow this to happen, a number of changes to how distribution networks are operated and how DG is connected and compensated are required, The research highlights the importance of real-time monitoring and control of reactive power to better utilise the existing transmission and distribution infrastructure, whilst ensuring security and quality of power supply, It is further emphasised that adequate reward schemes or mandates for reactive power need to be implemented if sufficient reactive power is to be procured for network voltage support.
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