distributed generation system Articles
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Hardware-in-the-Loop testing platform for distributed generation systems
The rapid validation of the expected performance of distributed generation installations is a critical step in the design process. However, the plethora of distributed generator types and the uniqueness of the load characteristics make the testing quite challenging. This paper introduces an original approach to Hardware-in-the-Loop simulation aimed to evaluate the performance and suitability of ...
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Operation and control of multiple Distributed Generation systems in the microgrid
This paper investigates the operation and control of multiple Distributed Generation (DG) systems interconnected to the utility in the form of microgrid. The developed model of the microgrid consists of microturbine generation system, converter-based DG system with stiff DC source, synchronous-generator-based DG system and wind power system with induction generator. The Simulation model of the ...
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Grid interconnection of microturbine-based distributed generation system
Distributed Generation (DG) is predicted to play an important role in the electric power system in the near future. The insertion of DG systems into existing electric systems has a great impact on real-time system operation and planning. It is widely accepted that Microturbine Generation (MTG) systems are currently attracting much attention for meeting customers' needs in the ...
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Controlling the power balance in an 'empty network'
This paper presents the concept of an 'empty network' and shows how the power balance can be controlled in such a system. In this study, an 'empty network' is defined as a transmission system in which no rotating mass is present. All generators are connected to distributed systems and 'hidden' behind power electronic interfaces. One generator creates a neat 50 Hz voltage that serves as a ...
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Market Development for Renewable Energy
Transmission and distribution loss estimates for India are as high as 30-50%, and many communities need improved quality and more reliable power. Increasing the share of distributed generation in the total electricity mix will have a significant impact on both clean energy supply, as well as emissions reductions. In addition, locating power generation closer to the consumer reduces technical ...
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Control and protection of distribution systems with distributed generators
Unquestionably, in the last years, the number of generators connected directly to electric power distribution systems has increased. In addition, the main statistics and signals show that such tendency could become even more intense in the coming years. As a consequence of this policy, many technical factors related to control, protection, operation and analysis of distribution systems should be ...
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Fuel cell–based distributed generation system with power flow and power quality control
This paper presents the modelling and control of fuel cell–based distributed generation system with embedded active filter functioning. It includes the modelling of proton electrolyte membrane fuel cell and the power conditioning unit interfacing the fuel cell to the utility grid with proper power flow control. The output of the fuel cell stack is given to the DC–DC boost converter ...
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A self-tuning optimised unscented Kalman filter for voltage flicker and harmonic estimation
This paper presents a novel technique for estimation of two important power quality problems like voltage flicker and harmonics in power networks using an unscented Kalman filter (UKF) algorithm. The fluctuating voltage of a power network resulting in voltage flicker is tracked for estimating its envelope, voltage magnitude, and frequency. Further, the unscented filter is used to estimate ...
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Improvement of power supply to rural customers through grid-interactive distributed generation
The integration of Distributed Generation (DG) into distribution grid systems introduces problems in network operation, control and protection. Key issues associated with DG inclusion are voltage or current control, cost-effective operation, protection coordination and network transients. Better understanding of these issues and finding solutions to these problems are important to power ...
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Characteristics of modern nonlinear loads and their influence on systems with distributed generation
Nonlinear electronic loads may demonstrate unexpected reactions to variations in power system voltage. This effect of the electrical load may be very significant in distributed generation power systems containing relatively small generators. This paper reviews modern nonlinear electronic load current consumption mechanisms and provides typical current waveforms. Based on extensive measurements ...
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Opportunities and obstacles: integrating energy efficiency into the transmission and distribution planning process
This paper seeks to highlight issues that warrant further evaluation associated with more precisely incorporating energy efficiency (EE) into a utility's system wide transmission and distribution (T&D) plan from a financial and load forecasting perspective while accounting for system reliability and ratepayer concerns. This paper also analyses how EE is integrated into grid operators' ...
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Analysis and experimental verification of a control scheme for unified power quality conditioner
Improving power quality for sensitive load by a Unified Power Quality Conditioner (UPQC) in a distributed generation system is presented in this paper. The power balance of a UPQC, consisting of back-to-back connected series and shunt Active Filters (AF), is analysed. Based on the analysis a novel control scheme is established in a 2-phase Synchronous Rotating d-q Frame (SRF). In this control ...
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The impact of the protection scheme of converter-connected distributed generation on power system transient stability
In this paper the impact of the protection scheme of converter-connected (power electronic-interfaced) Distributed Generation (DG) on power system transient stability is investigated. Two simulation setups are used for this purpose. In the first setup, a small/simple test system is used and the converter-connected DG is modelled as a practical three-phase full-bridge Voltage Source Converter ...
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Biofuel Promotion for Environmentally Sustainable Energy and Water Services
The success of power sector reform in India will rely in part on groundwater management improvements in the agricultural sector. Unreliable power supply and subsidized tariff structures lead to excessive water pumping by farmers who tend to pump water based on the power supply made available to them. Over-pumping contributes to higher energy consumption and rapid depletion of the groundwater ...
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Integrated framework for energy loss allocation in electric distribution systems under liberalised energy markets
This paper discusses an integrated framework for cost allocation of energy losses of electric distribution systems under liberalised energy markets. As key contribution is developed an allocation strategy based upon Locational and Uniform Incremental Prices. The locational incremental prices send efficient economical signals to distributed generators with incentives for loss minimisation and ...
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Modelling of three-phase grid-connected inverters
Grid-connected inverters are key elements that interface the distributed energy sources with the grid. In this paper, a graphic modelling method based on switching flow graph is presented for modelling inverters, with a one-cycle controlled inverter as an example. This method features great simplicity and accuracy, and is compatible with dynamic system-simulation software, such as MATLAB. PSPICE ...
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Reactive power compensation strategies for wind generation in distribution systems: a power quality approach
This paper studies the impact on the voltage profile of wind energy based generators connected to distribution power systems. Voltage fluctuations arise in distribution levels including noncontrollable primary energy sources because of their corresponding active power injection variations. A number of reactive power strategies have been analysed and compared focusing on the voltage fluctuation ...
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Design of single–stage three–phase grid–connected photovoltaic system with MPPT and reactive power compensation control
This paper proposes a single stage three–phase grid–connected photovoltaic (PV) system topology, it being simpler and more efficient. This includes the modelling of PV module and the power conditioning unit interfacing the PV to the utility grid with proper power flow control. The output of the PV panel is connected to the DC–side of the voltage source inverter for interfacing to the grid. The ...
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Assessing the benefits of a provision of system services by distributed generation
Distributed Generation (DG) units are said to have the potential to become an integral part of the future power systems. Today, DG units are characterised by high specific investment costs, but nevertheless are politically promoted because of their high degree of energy efficiency and their capability of reducing the current dependency on fossil fuels. However, at longer term DG units have to ...
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The ABCs of small hydro upgrade and automation
Abstract - Small hydroelectric is increasingly depended on to provide regional power capacity, as municipalities seek more sustainable sources of energy. Yet, hydroelectric or hydro power has some negative perceptions. Other sustainable sources of energy like wind and solar power are early in their equipment and technology life cycles. Hydroelectric facilities are typically older and operate with ...
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