The Experts below are selected from a list of 4263 Experts worldwide ranked by ideXlab platform

Mehdi Ferdowsi - One of the best experts on this subject based on the ideXlab platform.

  • Indirect Grid Current Control of LCL Filter based Grid-Connected Converter
    2019 IEEE Applied Power Electronics Conference and Exposition (APEC), 2019
    Co-Authors: Subhajyoti Mukherjee, Pourya Shamsi, Mehdi Ferdowsi, Jonathan W. Kimball
    Abstract:

    This paper presents a method to indirectly control the grid current of a grid connected converter interfaced with a LCL Filter. The proposed method is based on estimating the fundamental and harmonic components of the current drawn by the Filter Capacitor. The estimated fundamental and harmonic components of the Filter Capacitor current are then compensated by injecting an equal amount of current from the converter side using a well-designed current controller. This indirectly ensures the grid current to be at the desired power factor and immune to any distortions in the grid voltage. The proposed estimation and control scheme is verified by experimental results.

  • Filter Capacitor current estimation and grid current control in lcl based grid connected inverter
    European Conference on Cognitive Ergonomics, 2017
    Co-Authors: Subhajyoti Mukherjee, Vikram Roy Chowdhury, Pourya Shamsi, Mehdi Ferdowsi
    Abstract:

    The control of the grid side current in an LCL Filter based grid connected converter is generally complex and involve multi loop structure. This paper presents a method to control the grid current indirectly by controlling the converter side current with compensation of the Filter Capacitor current. The proposed control algorithm uses only one current sensor to measure the converter side current. The Filter Capacitor current need to be estimated and an estimation method is presented to do the same. Simulation and experimental results are presented to confirm the feasibility of the proposed scheme.

  • Indirect voltage control of a stand-alone inverter
    2017 IEEE Applied Power Electronics Conference and Exposition (APEC), 2017
    Co-Authors: Subhajyoti Mukherjee, Pourya Shamsi, Mehdi Ferdowsi
    Abstract:

    This paper discusses the control of the output voltage of a stand-alone single-phase inverter by directly controlling the output Filter Capacitor current. Compared to the conventional voltage control scheme, the proposed control approach has the potential of achieving higher bandwidth and hence improved total harmonic distortion (THD) of the output voltage. The proposed method depends on the value of the output Filter capacitance. A method to estimate the output Filter Capacitor based on a rms control loop is also presented. Simulation and experimental results presented validate the proposed scheme.

Sudip K. Mazumder - One of the best experts on this subject based on the ideXlab platform.

  • Analysis of Input Current Ripple and Optimum Filter Capacitor for Fuel-Cell-Based Single-Phase Inverter
    Journal of Fuel Cell Science and Technology, 2015
    Co-Authors: Tirthajyoti Sarkar, Sudip K. Mazumder
    Abstract:

    Most single-phase inverters, being sourced by fuel cell stacks (FCSs), subject the stacks to reflected low-frequency (120 Hz) current ripples that ride on average dc currents. The ripple current impacts the sizing and efficiency of the FCS. As such and typically, a passive or active Filter is required at the input of the inverter (or output of the FCS) to mitigate the ripple current. Toward that end, this paper outlines a guideline to choose the optimum size of a passive input-Filter Capacitor for a fuel-cell-based power system from the standpoints of the overall system energy density and cost. Detailed case-specific simulation results, based on an analytical approach, are provided to illustrate key issues for both unity power factor as well as harmonic loads.

  • Optimum input-Filter-Capacitor sizing for fuel-cell based single-phase inverter for current-ripple mitigation
    2011
    Co-Authors: Tirthajyoti Sarkar, Sudip K. Mazumder
    Abstract:

    Most single-phase inverters, being sourced by fuel-cell stacks (FCSs), subject the stacks to reflected low-frequency (120 Hz) current ripples that ride on average dc currents. The ripple current impacts the sizing and efficiency of the FCS. As such and typically, a passive or active Filter is required at the input of the inverter (or output of the FCS) to mitigate the ripple current. Towards that end, this paper outlines a guideline to choose the optimum size of a passive input-Filter Capacitor for a fuel-cell-based power system from the standpoints of the overall system energy density and cost. Detailed case-specific simulation results, based on an analytical approach, are provided to illustrate key issues for both unity-power-factor as well as harmonic loads.

D G Holmes - One of the best experts on this subject based on the ideXlab platform.

  • a comparative analysis of multiloop voltage regulation strategies for single and three phase ups systems
    IEEE Transactions on Power Electronics, 2003
    Co-Authors: Poh Chiang Loh, M J Newman, D N Zmood, D G Holmes
    Abstract:

    Most of the many reported control algorithms for uninterruptible power supplies (UPSs) use either Filter inductor or Filter Capacitor currents as feedback variables to regulate the output voltage. This paper explores the fundamental performance issues associated with the use of these quantities as feedback variables, with a view to determining their contribution to the transient system response and output harmonic compensation in any particular situation. A proportional plus resonant (P+resonant) compensator is then added into the outer voltage regulation loop to achieve zero steady error, to develop a high performance UPS control algorithm, which is applicable to both single-phase and three-phase systems. Theory, simulation, and experimental results are presented in the paper.

Subhajyoti Mukherjee - One of the best experts on this subject based on the ideXlab platform.

  • Indirect Grid Current Control of LCL Filter based Grid-Connected Converter
    2019 IEEE Applied Power Electronics Conference and Exposition (APEC), 2019
    Co-Authors: Subhajyoti Mukherjee, Pourya Shamsi, Mehdi Ferdowsi, Jonathan W. Kimball
    Abstract:

    This paper presents a method to indirectly control the grid current of a grid connected converter interfaced with a LCL Filter. The proposed method is based on estimating the fundamental and harmonic components of the current drawn by the Filter Capacitor. The estimated fundamental and harmonic components of the Filter Capacitor current are then compensated by injecting an equal amount of current from the converter side using a well-designed current controller. This indirectly ensures the grid current to be at the desired power factor and immune to any distortions in the grid voltage. The proposed estimation and control scheme is verified by experimental results.

  • Filter Capacitor current estimation and grid current control in lcl based grid connected inverter
    European Conference on Cognitive Ergonomics, 2017
    Co-Authors: Subhajyoti Mukherjee, Vikram Roy Chowdhury, Pourya Shamsi, Mehdi Ferdowsi
    Abstract:

    The control of the grid side current in an LCL Filter based grid connected converter is generally complex and involve multi loop structure. This paper presents a method to control the grid current indirectly by controlling the converter side current with compensation of the Filter Capacitor current. The proposed control algorithm uses only one current sensor to measure the converter side current. The Filter Capacitor current need to be estimated and an estimation method is presented to do the same. Simulation and experimental results are presented to confirm the feasibility of the proposed scheme.

  • Indirect voltage control of a stand-alone inverter
    2017 IEEE Applied Power Electronics Conference and Exposition (APEC), 2017
    Co-Authors: Subhajyoti Mukherjee, Pourya Shamsi, Mehdi Ferdowsi
    Abstract:

    This paper discusses the control of the output voltage of a stand-alone single-phase inverter by directly controlling the output Filter Capacitor current. Compared to the conventional voltage control scheme, the proposed control approach has the potential of achieving higher bandwidth and hence improved total harmonic distortion (THD) of the output voltage. The proposed method depends on the value of the output Filter capacitance. A method to estimate the output Filter Capacitor based on a rms control loop is also presented. Simulation and experimental results presented validate the proposed scheme.

Gunwoo Moon - One of the best experts on this subject based on the ideXlab platform.

  • minimizing effect of input Filter Capacitor in a digital boundary conduction mode power factor corrector based on time domain analysis
    IEEE Transactions on Power Electronics, 2016
    Co-Authors: Gunwoo Moon
    Abstract:

    Conventional phase leading input current (PLIC) compensation techniques have focused on a continuous conduction mode (CCM) boost power factor corrector (PFC). In precedent studies, the causes of the PLIC have been investigated by analyzing the current control loop and the input impedance of a boost PFC. However, in a boundary conduction mode (BCM) boost PFC, the current flowing through the input Filter Capacitor becomes a main cause due to its large ripple current. Despite that, there has not been any effort to compensate the current in the input Filter Capacitor (IFC) in a BCM boost PFC. In this paper, a new digital control method is proposed to compensate PLIC in a BCM boost PFC, by minimizing the effect of the IFC. The proposed method uses only the derivative of the input voltage, without any additional component. Also, the proposed method improves the displacement factor, but does not affect the distortion factor, resulting in a high power quality in the entire input and output conditions. The derivation of the proposed method is presented based on time-domain analysis, and the effectiveness of the proposed method is experimentally verified with a 60-Hz, 90–230 $V_{{\rm rms}}$ input and 395-V/0.5-A output prototype.