The Experts below are selected from a list of 16200 Experts worldwide ranked by ideXlab platform

Manuela Sechilariu - One of the best experts on this subject based on the ideXlab platform.

  • Energy management of DC microgrid based on photovoltaic combined with Diesel Generator and supercapacitor
    Energy Conversion and Management, 2017
    Co-Authors: Changjie Yin, Fabrice Locment, Hongwei Wu, Manuela Sechilariu
    Abstract:

    Microgrid is promoted as an economical and efficient energy system in which different renewable sources and storage are interconnected to meet the load power demand at any time. It can operate in on-grid and off-grid mode. Since the electrical contribution of each renewable energy source is dependent on the variation of its resource and the load power demand changes time to time, it is possible that the microgrid cannot generate enough electricity at some time. Thus, especially in off-grid mode, a Diesel Generator is needed as another backup power. However, due to the slow dynamic behavior of the Diesel Generator start-up stage, the power quality is lowered down because of the shortage of power. Therefore, during the period of the Diesel Generator starting up, a supercapacitor is suggested to compensate the power balance because of its fast response and high power density. In addition, the supercapacitor can be also used to overcome the electrochemical storage limits like its state of charge and maximum current. This paper proposes a method for power balance control of a hybrid multisource DC microgrid system aiming to meet the load power demand with reliability and stabilizing the DC bus voltage. In order to realize this function, an experimental platform has been set up and the energy management strategy has been implemented into the control process. The experimental results show that the designed control strategy improves the DC microgrid dynamic and static performances under such operating conditions.

  • Diesel Generator slow start-up compensation by supercapacitor for DC microgrid power balancing
    2016 IEEE International Energy Conference (ENERGYCON), 2016
    Co-Authors: Changjie Yin, Manuela Sechilariu, Fabrice Locment
    Abstract:

    By aggregating renewable sources as main Generators, storage systems, Diesel Generator, and loads, microgrids can achieve high level renewable energy penetration and efficiency in electricity distribution systems. The difference between loads consumption and renewable generation causes fluctuations in the microgrid bus voltage. For off-grid operating mode or limited public grid availability, power balance is performed by adjusting storage and Diesel Generator power for voltage stabilization. However, due to the slow dynamic behavior of the Diesel Generator, especially the start-up stage, the power quality is lowered down during the sudden load power increase or sudden renewable power decrease. So, the microgrid power balancing needs to be compensated by a fast response storage. This paper focuses on Diesel Generator slow start-up dynamic compensation by supercapacitor for DC microgrid power balancing. Based on simulation results, this study shows that the designed control strategy improves the microgrid dynamic characteristics under such operating conditions.

Tamer Khatib - One of the best experts on this subject based on the ideXlab platform.

  • simplified performance models of photovoltaic Diesel Generator battery system considering typical control strategies
    Energy Conversion and Management, 2015
    Co-Authors: Ammar Mohammed Ameen, Jagadeesh Pasupuleti, Tamer Khatib
    Abstract:

    Abstract Simplified dynamic models of photovoltaic/Diesel Generator/battery system using MATLAB line code are presented in this paper. The main purpose of these models is to predict the performance of photovoltaic/Diesel Generator/battery system through a specific time period. A complex battery model as well as the most recommended control strategies such as load following and cycle-charging dispatch are considered in the proposed models. Finally, the proposed models are validated using simulation and experimental data. Such models are helpful in studies related to hybrid photovoltaic/Diesel Generator/battery system control, sizing and performance assessments.

  • a novel numerical algorithm for optimal sizing of a photovoltaic wind Diesel Generator battery microgrid using loss of load probability index
    International Journal of Photoenergy, 2013
    Co-Authors: Hussein A Kazem, Tamer Khatib
    Abstract:

    This paper presents a method for determining optimal sizes of PV array, wind turbine, Diesel Generator, and storage battery installed in a building integrated system. The objective of the proposed optimization is to design the system that can supply a building load demand at minimum cost and maximum availability. The mathematical models for the system components as well as meteorological variables such as solar energy, temperature, and wind speed are employed for this purpose. Moreover, the results showed that the optimum sizing ratios (the daily energy generated by the source to the daily energy demand) for the PV array, wind turbine, Diesel Generator, and battery for a system located in Sohar, Oman, are 0.737, 0.46, 0.22, and 0.17, respectively. A case study represented by a system consisting of 30 kWp PV array (36%), 18 kWp wind farm (55%), and 5 kVA Diesel Generator (9%) is presented. This system is supposed to power a 200 kWh/day load demand. It is found that the generated energy share of the PV array, wind farm, and Diesel Generator is 36%, 55%, and 9%, respectively, while the cost of energy is 0.17 USD/kWh.

  • optimal sizing of building integrated hybrid pv Diesel Generator system for zero load rejection for malaysia
    Energy and Buildings, 2011
    Co-Authors: Tamer Khatib, Azah Mohamed, Kamaruzzaman Sopian, M Mahmoud
    Abstract:

    Abstract In this research, an optimisation for building integrated hybrid PV/Diesel Generator system for zero load rejection for Malaysia is performed. The optimisation is performed considering a loss-of-load probability (LLP) less than 0.01. However, the daily averages of solar energy for Malaysia and a mathematical model of a hybrid PV/Diesel Generator system are used in this optimisation. The optimisation presented in this paper aims to calculate the optimum capacities of a PV array and Diesel Generator, which investigate the minimum system cost. An optimisation problem in terms of system units’ cost is solved graphically in this study. Moreover, the optimised system is compared to other energy source choices to highlight its feasibility. The recommended configuration of a PV/Diesel system located in Malaysia is C A  = 1.2, C DG  = 0.3, while the optimum C B is 0.1. The results of the optimisation show that a PV/Diesel Generator choice is more feasible compared to a standalone PV system or Diesel Generator system because it reduces the system cost by 35%.

Changjie Yin - One of the best experts on this subject based on the ideXlab platform.

  • Energy management of DC microgrid based on photovoltaic combined with Diesel Generator and supercapacitor
    Energy Conversion and Management, 2017
    Co-Authors: Changjie Yin, Fabrice Locment, Hongwei Wu, Manuela Sechilariu
    Abstract:

    Microgrid is promoted as an economical and efficient energy system in which different renewable sources and storage are interconnected to meet the load power demand at any time. It can operate in on-grid and off-grid mode. Since the electrical contribution of each renewable energy source is dependent on the variation of its resource and the load power demand changes time to time, it is possible that the microgrid cannot generate enough electricity at some time. Thus, especially in off-grid mode, a Diesel Generator is needed as another backup power. However, due to the slow dynamic behavior of the Diesel Generator start-up stage, the power quality is lowered down because of the shortage of power. Therefore, during the period of the Diesel Generator starting up, a supercapacitor is suggested to compensate the power balance because of its fast response and high power density. In addition, the supercapacitor can be also used to overcome the electrochemical storage limits like its state of charge and maximum current. This paper proposes a method for power balance control of a hybrid multisource DC microgrid system aiming to meet the load power demand with reliability and stabilizing the DC bus voltage. In order to realize this function, an experimental platform has been set up and the energy management strategy has been implemented into the control process. The experimental results show that the designed control strategy improves the DC microgrid dynamic and static performances under such operating conditions.

  • Diesel Generator slow start-up compensation by supercapacitor for DC microgrid power balancing
    2016 IEEE International Energy Conference (ENERGYCON), 2016
    Co-Authors: Changjie Yin, Manuela Sechilariu, Fabrice Locment
    Abstract:

    By aggregating renewable sources as main Generators, storage systems, Diesel Generator, and loads, microgrids can achieve high level renewable energy penetration and efficiency in electricity distribution systems. The difference between loads consumption and renewable generation causes fluctuations in the microgrid bus voltage. For off-grid operating mode or limited public grid availability, power balance is performed by adjusting storage and Diesel Generator power for voltage stabilization. However, due to the slow dynamic behavior of the Diesel Generator, especially the start-up stage, the power quality is lowered down during the sudden load power increase or sudden renewable power decrease. So, the microgrid power balancing needs to be compensated by a fast response storage. This paper focuses on Diesel Generator slow start-up dynamic compensation by supercapacitor for DC microgrid power balancing. Based on simulation results, this study shows that the designed control strategy improves the microgrid dynamic characteristics under such operating conditions.

W. Busch - One of the best experts on this subject based on the ideXlab platform.

  • Evaluating the transient performance of standby Diesel-Generator units by simulation
    IEEE Transactions on Energy Conversion, 1992
    Co-Authors: I.d. Hassan, R. Weronick, R.m. Bucci, W. Busch
    Abstract:

    The transient behavior of the standby Diesel-Generator units and the engineered safeguard loads at an operating nuclear power generating station was simulated using the electromagnetic transients program (EMTP). The authors discuss the standby Diesel-Generator units and the engineered safeguard load model development and the validation and verification of the applicable EMTP modules. The simulation results demonstrating the standby Diesel-Generator unit capability and illustrating the predicted transient deviations in the Generator terminal voltage and frequency are included together with the voltage deviations within the engineered safeguard features distribution system. >

  • Evaluating the transient performance of emergency Diesel Generator units by computer modeling
    Transactions of the American Nuclear Society, 1990
    Co-Authors: R.m. Bucci, I.d. Hassan, R. Weronick, W. Busch
    Abstract:

    Diesel Generator units applied as standby power supplies for nuclear power generating stations are required to start, accelerate, and accept engineered safeguards loads within a specified time period. In addition, voltage and frequency at the Generator terminals must be maintained within limits during normal and transient conditions, including transients caused by load application and removal. Traditionally, factory tests, site acceptance, and periodic test have been used to demonstrate the capability of Diesel Generator units. For the factory tests, equivalent loads are used to approximate the dynamic characteristics of the engineered safeguards loads. For site tests, it is difficult to obtain the actual loading that could occur during plant emergency conditions. Also, plant modifications to meet the ongoing regulatory process may require that existing Diesel Generator units supply more equipment. However, before changes are made to the loading of an existing Diesel Generator unit, it is necessary to analyze the effect of additional loads on its transient performance. Alternate loading sequences may have to be considered, and it may be necessary to consider replacing the governor or the voltage regulator to accommodate the load increases. The Electromagnetic Transient Analysis Program (EMTP) has recently been used to analyze the transient performance ofmore » existing and newly purchased Diesel Generator units at a nuclear power generating station. A model was developed to represent the dynamics of the Diesel engine, governor, Generator, exciter/regulator, motors with driven equipment, and other loads.« less

Fabrice Locment - One of the best experts on this subject based on the ideXlab platform.

  • Energy management of DC microgrid based on photovoltaic combined with Diesel Generator and supercapacitor
    Energy Conversion and Management, 2017
    Co-Authors: Changjie Yin, Fabrice Locment, Hongwei Wu, Manuela Sechilariu
    Abstract:

    Microgrid is promoted as an economical and efficient energy system in which different renewable sources and storage are interconnected to meet the load power demand at any time. It can operate in on-grid and off-grid mode. Since the electrical contribution of each renewable energy source is dependent on the variation of its resource and the load power demand changes time to time, it is possible that the microgrid cannot generate enough electricity at some time. Thus, especially in off-grid mode, a Diesel Generator is needed as another backup power. However, due to the slow dynamic behavior of the Diesel Generator start-up stage, the power quality is lowered down because of the shortage of power. Therefore, during the period of the Diesel Generator starting up, a supercapacitor is suggested to compensate the power balance because of its fast response and high power density. In addition, the supercapacitor can be also used to overcome the electrochemical storage limits like its state of charge and maximum current. This paper proposes a method for power balance control of a hybrid multisource DC microgrid system aiming to meet the load power demand with reliability and stabilizing the DC bus voltage. In order to realize this function, an experimental platform has been set up and the energy management strategy has been implemented into the control process. The experimental results show that the designed control strategy improves the DC microgrid dynamic and static performances under such operating conditions.

  • Diesel Generator slow start-up compensation by supercapacitor for DC microgrid power balancing
    2016 IEEE International Energy Conference (ENERGYCON), 2016
    Co-Authors: Changjie Yin, Manuela Sechilariu, Fabrice Locment
    Abstract:

    By aggregating renewable sources as main Generators, storage systems, Diesel Generator, and loads, microgrids can achieve high level renewable energy penetration and efficiency in electricity distribution systems. The difference between loads consumption and renewable generation causes fluctuations in the microgrid bus voltage. For off-grid operating mode or limited public grid availability, power balance is performed by adjusting storage and Diesel Generator power for voltage stabilization. However, due to the slow dynamic behavior of the Diesel Generator, especially the start-up stage, the power quality is lowered down during the sudden load power increase or sudden renewable power decrease. So, the microgrid power balancing needs to be compensated by a fast response storage. This paper focuses on Diesel Generator slow start-up dynamic compensation by supercapacitor for DC microgrid power balancing. Based on simulation results, this study shows that the designed control strategy improves the microgrid dynamic characteristics under such operating conditions.