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Distributed generation (DG) has an important role in power distribution system planning because of its modularity, small size and low investment cost. Due to environmental concerns, interests to use renewable energy as primary resource of distributed generation have been increased. Reliability improvement, operational cost reduction and power loss decreasing are some of the main benefits of DG allocation...
In this paper, a novel microgrid energy trading model (METM) is proposed to determine an optimal schedule of all available units over a planning horizon so as to meet all system, plant and unit constraints, as well as meet the load and ancillary service demands. As the optimization greatly depends on the power generation and the power output from renewable sources strongly depends on the weather,...
Increasing the penetration level of distributed generation (DG) into the distribution system is a new challenge for traditional electric power systems. Although it is generally recognised that DG has the potential of reducing energy losses in power systems, inappropriate modelling can lead to a misleading predictions for power loss reduction in DG planning. This paper presents an investigation into...
A robust and efficient tool for computing the voltage stability margin of distribution systems is proposed in this paper. This margin corresponds to the distance from the current operating point to the maximum loading point in load parameter space along a predefined load increase direction. This tool is based on computing the voltage stability index of a two-bus equivalent circuit for predicting load...
Dispersed generations (DGs) from renewable energy resources are becoming popular and start to show benefits, but their connection to distribution systems brings operation challenges and supply uncertainty that must be carefully monitored and forecasted to provide data for correct controls of the systems. This paper proposes a distributed monitoring and centralized forecasting strategy for distribution...
This paper presents voltage and reactive power control methods in distribution systems in the presence of distributed generation (DG). Both uncoordinated and coordinated voltage control, without and with DG involved in the voltage control, are investigated. The uncoordinated voltage control means that all voltage and reactive power control equipment operate locally. The coordinated voltage control...
Renewable-energy powered distributed generations (DGs) of electricity are becoming popular and start to show benefits, but their connection to the utility distribution systems brings operation challenges and supply uncertainty that must be carefully monitored and forecasted to provide data for correct controls of the systems. This paper proposes a new strategy for distributed monitoring and centralized...
The following topics are dealt with: uncertainty forecasting; wind generation; decision making; generation planning; load forecasting; power generation scheduling; ageing model; power system reliability; distributed generation; failure probability; transformer reliability; electricity markets; power equipment optimal allocation; power system protection; power system planning; and HVDC.
As the development of energy market and the interest for new energy recourses such as wind energy and solar energy, energy management system of distributed generation (DG) becomes significant for the stability and economic operation of the DG system. This paper introduced a basic structure of DG system and illustrated the principle of power forecasting using neutral network. Finally a novel energy...
A microgrid supply/demand control system is proposed. In this control system, operation planning is realized based on generation and load forecasting by using artificial neural network and fuzzy systems. Unit commitment of generation includes start/stop of power generation and energy storage. Load following function is accomplished based on PI control scheme. To compensate for the power fluctuation...
The need for renewable power generation in power systems is becoming more importance. This need requires geographically-distributed power systems to be integrated as a single entity where among the main features of this integration are large data base and computing intensive. Grid Computing is a gateway to virtual storage media and processing power, this paper describes how grid computing can be utilized...
In this paper, a single-phase high-frequency AC (HFAC) microgrid is shown as a novel solution towards integrating renewable energy sources in a distributed generation system. Better utilization of the Microgrid is achieved by solving power flow and power quality issues using p-q theory-based active filtering called universal active power line conditioner and unified power quality conditioner, respectively...
Distribution network development planning is a complex task due to the size of a typical distribution network, the interconnectivity of its elements and the presence of various uncertainties. This planning process becomes even more complicated due to the constant pressure to reduce distribution network capacity reserve, operation and maintenance cost, and to postpone the capital investments as far...
This paper presents the probabilistic approach to the design of photovoltaic (PV) distributed generation (DG) and its impact on low voltage (LV) feeder. Monte Carlo simulation is used to predict solar radiation and load, and an exact method is used to solve the power flow. The method is tested on two study cases, and the results are compared with those from deterministic approach based on commonly...
Today's European electricity grids have evolved over more than hundred years. The increasing penetration of renewable energy sources and other distributed sources in the energy supply in distribution grids leads to numerous technical challenges, which need a European approach. To cope with this, European pilot installations and field tests in research projects under the 5th framework programme as...
Reliability assessment is of primary importance in designing and planning distribution systems that operate in an economical manner with minimal interruption of customer loads. With the advances in renewable energy sources, distributed generation (DG), is forecasted to increase in distribution networks. This paper presents a new methodology that can be used to quantitatively analyze the reliability...
The following topics were dealt with: power quality; industry restructuring; IEEE 1453 flicker standard; transmission expansion planning; system stability; power systems computer simulation; distribution economics; load forecasting; price forecasting; VAr allocation; distribution analysis; DSM; energy markets; distributed generation; FACTS; power generation control; power engineering education; power...
The growth of distributed generation requires analysis based on realistic forecasts of future scenarios. This paper presents an original methodology that has been employed to develop penetration scenarios to support further research. The methodology combines top-down and bottom-up approaches to produce robust scenarios. The top-down approach is based on forecasts of total distributed generation at...
A single phase high frequency AC (HFAC) microgrid is a novel solution towards integration of renewable energy sources in a distributed generation system. Power flow and power quality issues in the HFAC microgrid are controlled by the active filtering solutions called universal active power line conditioner (UPLC) and unified power quality conditioner (UPQC) respectively. After power quality and power...
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