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Henry Shuhung Chung - One of the best experts on this subject based on the ideXlab platform.

  • constant frequency Hysteresis current Control of grid connected vsi without bandwidth Control
    Energy Conversion Congress and Exposition, 2009
    Co-Authors: Victor Suipung Cheung, Henry Shuhung Chung
    Abstract:

    The theory, design, and implementation of a constant-frequency Hysteresis current Control for grid-connected voltage source inverter (VSI) is presented. The proposed Control technique retains the benefit of the Hysteresis Control having fast dynamic response and tackles the drawback of the standard Hysteresis Control having variable switching frequency. The concept is based on predicting the current reference, system dynamic behavior and past time to formulate the switching function for dictating the switching times of the switches in the inverter within a pre-defined switching period. Of particular importance, no Hysteresis bandwidth (a challenge in the practical implementation) is needed in the entire Control method. The operating principles of proposed technique and mathematical derivation of the switching functions will be given. The proposed method is successfully applied to a 300W, 110V, 60Hz grid-connected VSI prototype with the Controller implemented by a simple analog circuit. The steady-state and large-signal dynamic response of the VSI are studied. Experimental results show that the inverter can reach the steady-state in two switching actions after the inverter is subject to large-signal input and output disturbances.

  • constant frequency Hysteresis current Control of grid connected vsi without bandwidth Control
    IEEE Transactions on Power Electronics, 2009
    Co-Authors: Victor Suipung Cheung, Henry Shuhung Chung
    Abstract:

    The theory, design, and implementation of a constant-frequency Hysteresis current Control for grid-connected voltage source inverter (VSI) is presented. The proposed Control technique retains the benefit of the Hysteresis Control having fast dynamic response and tackles the drawback of the standard Hysteresis Control having variable switching frequency. The concept is based on predicting the current reference, system dynamic behavior, and past time to formulate the switching function for dictating the switching times of the switches in the inverter within a predefined switching period. Of particular importance, no Hysteresis bandwidth (a challenge in the practical implementation) is needed in the entire Control method. The operating principles of the proposed technique and mathematical derivation of the switching functions will be given. The proposed method is successfully applied to a 300 W, 110 V, 60 Hz grid-connected VSI prototype with the Controller implemented by a simple analog circuit. The steady-state and large-signal dynamic response of the VSI are studied. Experimental results show that the inverter can reach the steady state in two switching actions after the inverter is subject to large-signal input and output disturbances.

  • dynamic Hysteresis band Control of the buck converter with fast transient response
    IEEE Transactions on Circuits and Systems Ii-express Briefs, 2005
    Co-Authors: K K S Leung, Henry Shuhung Chung
    Abstract:

    A dynamic Hysteresis Control of the buck converter for achieving high slew-rate response to disturbances is proposed. The Hysteresis band is derived from the output capacitor current that predicts the output voltage magnitude after a hypothesized switching action. Four switching criteria are formulated to dictate the state of the main switch. The output voltage can revert to the steady state in two switching actions after a large-signal disturbance. The technique is verified with the experimental results of a 50 W buck converter.

Arif Sasongko - One of the best experts on this subject based on the ideXlab platform.

  • energy management of fuel cell battery supercapacitor hybrid power sources using model predictive Control
    IEEE Transactions on Industrial Informatics, 2014
    Co-Authors: Riyanto T Bambang, Arief Syaichu Rohman, Cees Jan Dronkers, Romeo Ortega, Arif Sasongko
    Abstract:

    Well known as an efficient and eco-friendly power source, fuel cell, unfortunately, offers slow dynamics. When attached as primary energy source in a vehicle, fuel cell would not be able to respond to abrupt load variations. Supplementing battery and/or supercapacitor to the system will provide a solution to this shortcoming. On the other hand, a current regulation that is vital for lengthening time span of the energy storage system is needed. This can be accomplished by keeping fuel cell's and batteries' current slope in reference to certain values, as well as attaining a stable dc output voltage. For that purpose, a feedback Control system for regulating the hybrid of fuel cell, batteries, and supercapacitor was constructed for this study. Output voltage of the studied hybrid power sources (HPS) was administered by assembling three dc-dc converters comprising two bidirectional converters and one boost converter. Current/voltage output of fuel cell was regulated by boost converter, whereas the bidirectional converters regulated battery and supercapacitor. Reference current for each converter was produced using Model Predictive Control (MPC) and subsequently tracked using Hysteresis Control. These functions were done on a Controller board of a dSPACE DS1104. Subsequently, on a test bench made up from 6 V, 4.5 Ah battery and 7.5 V, 120 F supercapacitor together with a fuel cell of 50 W, 10 A, experiment was conducted. Results show that constructing a Control system to restrict fuel cell's and batteries' current slope and maintaining dc bus voltage in accordance with the reference values using MPC was feasible and effectively done.

  • energy management of fuel cell battery supercapacitor hybrid power sources using model predictive Control
    IEEE Transactions on Industrial Informatics, 2014
    Co-Authors: Riyanto T Bambang, Arief Syaichu Rohman, Cees Jan Dronkers, Romeo Ortega, Arif Sasongko
    Abstract:

    Well known as an efficient and eco-friendly power source, fuel cell, unfortunately, offers slow dynamics. When attached as primary energy source in a vehicle, fuel cell would not be able to respond to abrupt load variations. Supplementing battery and/or supercapacitor to the system will provide a solution to this shortcoming. On the other hand, a current regulation that is vital for lengthening time span of the energy storage system is needed. This can be accomplished by keeping fuel cell's and batteries' current slope in reference to certain values, as well as attaining a stable dc output voltage. For that purpose, a feedback Control system for regulating the hybrid of fuel cell, batteries, and supercapacitor was constructed for this study. Output voltage of the studied hybrid power sources (HPS) was administered by assembling three dc-dc converters comprising two bidirectional converters and one boost converter. Current/voltage output of fuel cell was regulated by boost converter, whereas the bidirectional converters regulated battery and supercapacitor. Reference current for each converter was produced using Model Predictive Control (MPC) and subsequently tracked using Hysteresis Control. These functions were done on a Controller board of a dSPACE DS1104. Subsequently, on a test bench made up from 6 V, 4.5 Ah battery and 7.5 V, 120 F supercapacitor together with a fuel cell of 50 W, 10 A, experiment was conducted. Results show that constructing a Control system to restrict fuel cell's and batteries' current slope and maintaining dc bus voltage in accordance with the reference values using MPC was feasible and effectively done.

Yingduo Han - One of the best experts on this subject based on the ideXlab platform.

  • Hysteresis current Control of hybrid active power filters
    Iet Power Electronics, 2012
    Co-Authors: Chiseng Lam, Manchung Wong, Yingduo Han
    Abstract:

    This article presents a Hysteresis pulse width modulation study for a inductor-capacitor (LC)-coupling hybrid active power filter (HAPF). As the coupling LC impedance yields a non-linear inverter current slope, this can affect the Controllability of using the conventional Hysteresis Control method and generate unexpected trigger signals to the switching devices. This results in deteriorating the system operating performances. On the basis of the proposed modelling, the linearisation of the Hysteresis Control for the HAPF is firstly studied, investigated and compared with the linear active power filter. Two limits are proposed in this study that divides the HAPF into non-linear, quasi-linear and linear operation regions. The design criteria of Hysteresis band and sampling time can then be derived. Single-phase simulation and experimental results are given to verify the Hysteresis Control study of HAPF compared with active power filter. Finally, representative simulation and experimental results of a three-phase four-wire centre-split HAPF for power quality compensation are presented to demonstrate the validity of the Hysteresis linearisation study.

  • application of a three level npc inverter as a three phase four wire power quality compensator by generalized 3dsvm
    IEEE Transactions on Power Electronics, 2006
    Co-Authors: Ningyi Dai, Manchung Wong, Yingduo Han
    Abstract:

    A two-level four-leg inverter has been developed for the three-phase four-wire power quality compensators. When it is applied to medium and large capacity compensators, the voltage stress across each switch is so high that the corresponding dv/dt causes large electromagnetic interference. The multilevel voltage source inverter topologies are good substitutes, since they can reduce voltage stress and improves output harmonic contents. The existing three-level neutral point clamped (NPC) inverter in three-phase three-wire systems can be used in three-phase four-wire systems also, because the split dc capacitors provide a neutral connection. This paper presents a comparison study between the three-level four-leg NPC inverter and the three-level NPC inverter. A fast and generalized applicable three-dimensional space vector modulation (3DSVM) is proposed for Controlling a three-level NPC inverter in a three-phase four-wire system. The zero-sequence component of each vector is considered in order to implement the neutral current compensation. Both simulation and experimental results are given to show the effectiveness of the proposed 3DSVM Control strategy. Comparisons between the 3DSVM and the 3-D Hysteresis Control strategy are also achieved.

  • Controlling trilevel center split power quality compensator by 3 dimensional space vector modulation
    International Conference on Power Electronics and Drive Systems, 2003
    Co-Authors: Ningyi Dai, Manchung Wong, Yingduo Han
    Abstract:

    In the past researches, strategies based on Hysteresis Control are proposed for Controlling trilevel 3-leg center-split inverter, which can be used as a shunt power quality compensator for three-phase four-wire system. In this paper, results indicate that the complicated 3-dimensional (3D) space vector allocation of the trilevel center-split inverter can be simplified into six space vector regions of two-level center-split inverter. Thus, based on the 3D space vector modulation (3DSVM) Control strategy for two-level center-split inverter, the novel 3DSVM Control strategy for trilevel 3-leg center-split inverter is proposed. Different from the conventional 2-dimensional space vector modulation (2DSVM), the zero-axis component should be of a major concern in this novel 3DSVM since 3D space vectors are located in different horizontal planes and each vector contributes to zero-axis compensation. When the zero-axis component is considered, the neutral current of the three-phase four-wire system can be compensated simultaneously with three-phase current harmonics. Simulation results are given to show the validity of the proposed Control strategy.

  • cylindrical coordinate Control of three dimensional pwm technique in three phase four wired trilevel inverter
    IEEE Transactions on Power Electronics, 2003
    Co-Authors: Manchung Wong, Jing Tang, Yingduo Han
    Abstract:

    In past decades, almost all the studies are focused in two-dimensional (2-D) PWM techniques on /spl alpha/-/spl beta/ frame. A four-legs inverter is proposed to compensate the three-phase four-wired system issues. However, three-legs center-split inverter can be applied to compensate the power quality issues including the zero-sequence compensation by the novel PWM technique: three-dimensional (3-D) PWM. In this paper, the mathematical model of shunt-connected three-level power inverter in three-phase four-wired system is studied in a-b-c-0 frame. The study of 3-D voltage space vector PWM technique in two-level and three-level inverters is performed in rectangular, cylindrical, and spherical coordinates, respectively. The 3DPWM performance indices are proposed. Comparative study of fixed switching sign cubical Hysteresis Control with this novel proposed technique "cylindrical coordinate Control strategy" is accomplished. The results show that the performance of the proposed novel Control strategy can overcome the drawbacks of fixed switching sign cubical Hysteresis 3DPWM Control strategy.

  • Three-dimensional pulse-width modulation technique in three-level power inverters for three-phase four-wired system
    IEEE Transactions on Power Electronics, 2001
    Co-Authors: Manchung Wong, Yingduo Han, Zheng-yi Zhao, Liang-bing Zhao
    Abstract:

    Shunt-connected trilevel power inverter in three-phase four-wired system as an active filter or individual current supply (peak-load supply) is studied by a novel technique: three-dimensional (3-D) voltage vectors pulse width modulation (PWM). In past decades, almost all the study for PWM is limited to the two-dimensional (2-D) domain, /spl alpha/ and /spl beta/ frames, in a three-phase three-wired system. However, in practical operation, there are many three-phase four-wired systems in distribution sites. The generalized study of 3-D two-level and three-level inverters is achieved in this paper so as to perform the basic theory of 3-D multilevel space vector switching PWM technique. The sign cubical Hysteresis Control strategy is proposed and studied with simulation results in 3-D aspect. The 3-D PWM technique in three-level inverters is accomplished.

Riyanto T Bambang - One of the best experts on this subject based on the ideXlab platform.

  • energy management of fuel cell battery supercapacitor hybrid power sources using model predictive Control
    IEEE Transactions on Industrial Informatics, 2014
    Co-Authors: Riyanto T Bambang, Arief Syaichu Rohman, Cees Jan Dronkers, Romeo Ortega, Arif Sasongko
    Abstract:

    Well known as an efficient and eco-friendly power source, fuel cell, unfortunately, offers slow dynamics. When attached as primary energy source in a vehicle, fuel cell would not be able to respond to abrupt load variations. Supplementing battery and/or supercapacitor to the system will provide a solution to this shortcoming. On the other hand, a current regulation that is vital for lengthening time span of the energy storage system is needed. This can be accomplished by keeping fuel cell's and batteries' current slope in reference to certain values, as well as attaining a stable dc output voltage. For that purpose, a feedback Control system for regulating the hybrid of fuel cell, batteries, and supercapacitor was constructed for this study. Output voltage of the studied hybrid power sources (HPS) was administered by assembling three dc-dc converters comprising two bidirectional converters and one boost converter. Current/voltage output of fuel cell was regulated by boost converter, whereas the bidirectional converters regulated battery and supercapacitor. Reference current for each converter was produced using Model Predictive Control (MPC) and subsequently tracked using Hysteresis Control. These functions were done on a Controller board of a dSPACE DS1104. Subsequently, on a test bench made up from 6 V, 4.5 Ah battery and 7.5 V, 120 F supercapacitor together with a fuel cell of 50 W, 10 A, experiment was conducted. Results show that constructing a Control system to restrict fuel cell's and batteries' current slope and maintaining dc bus voltage in accordance with the reference values using MPC was feasible and effectively done.

  • energy management of fuel cell battery supercapacitor hybrid power sources using model predictive Control
    IEEE Transactions on Industrial Informatics, 2014
    Co-Authors: Riyanto T Bambang, Arief Syaichu Rohman, Cees Jan Dronkers, Romeo Ortega, Arif Sasongko
    Abstract:

    Well known as an efficient and eco-friendly power source, fuel cell, unfortunately, offers slow dynamics. When attached as primary energy source in a vehicle, fuel cell would not be able to respond to abrupt load variations. Supplementing battery and/or supercapacitor to the system will provide a solution to this shortcoming. On the other hand, a current regulation that is vital for lengthening time span of the energy storage system is needed. This can be accomplished by keeping fuel cell's and batteries' current slope in reference to certain values, as well as attaining a stable dc output voltage. For that purpose, a feedback Control system for regulating the hybrid of fuel cell, batteries, and supercapacitor was constructed for this study. Output voltage of the studied hybrid power sources (HPS) was administered by assembling three dc-dc converters comprising two bidirectional converters and one boost converter. Current/voltage output of fuel cell was regulated by boost converter, whereas the bidirectional converters regulated battery and supercapacitor. Reference current for each converter was produced using Model Predictive Control (MPC) and subsequently tracked using Hysteresis Control. These functions were done on a Controller board of a dSPACE DS1104. Subsequently, on a test bench made up from 6 V, 4.5 Ah battery and 7.5 V, 120 F supercapacitor together with a fuel cell of 50 W, 10 A, experiment was conducted. Results show that constructing a Control system to restrict fuel cell's and batteries' current slope and maintaining dc bus voltage in accordance with the reference values using MPC was feasible and effectively done.

Victor Suipung Cheung - One of the best experts on this subject based on the ideXlab platform.

  • constant frequency Hysteresis current Control of grid connected vsi without bandwidth Control
    Energy Conversion Congress and Exposition, 2009
    Co-Authors: Victor Suipung Cheung, Henry Shuhung Chung
    Abstract:

    The theory, design, and implementation of a constant-frequency Hysteresis current Control for grid-connected voltage source inverter (VSI) is presented. The proposed Control technique retains the benefit of the Hysteresis Control having fast dynamic response and tackles the drawback of the standard Hysteresis Control having variable switching frequency. The concept is based on predicting the current reference, system dynamic behavior and past time to formulate the switching function for dictating the switching times of the switches in the inverter within a pre-defined switching period. Of particular importance, no Hysteresis bandwidth (a challenge in the practical implementation) is needed in the entire Control method. The operating principles of proposed technique and mathematical derivation of the switching functions will be given. The proposed method is successfully applied to a 300W, 110V, 60Hz grid-connected VSI prototype with the Controller implemented by a simple analog circuit. The steady-state and large-signal dynamic response of the VSI are studied. Experimental results show that the inverter can reach the steady-state in two switching actions after the inverter is subject to large-signal input and output disturbances.

  • constant frequency Hysteresis current Control of grid connected vsi without bandwidth Control
    IEEE Transactions on Power Electronics, 2009
    Co-Authors: Victor Suipung Cheung, Henry Shuhung Chung
    Abstract:

    The theory, design, and implementation of a constant-frequency Hysteresis current Control for grid-connected voltage source inverter (VSI) is presented. The proposed Control technique retains the benefit of the Hysteresis Control having fast dynamic response and tackles the drawback of the standard Hysteresis Control having variable switching frequency. The concept is based on predicting the current reference, system dynamic behavior, and past time to formulate the switching function for dictating the switching times of the switches in the inverter within a predefined switching period. Of particular importance, no Hysteresis bandwidth (a challenge in the practical implementation) is needed in the entire Control method. The operating principles of the proposed technique and mathematical derivation of the switching functions will be given. The proposed method is successfully applied to a 300 W, 110 V, 60 Hz grid-connected VSI prototype with the Controller implemented by a simple analog circuit. The steady-state and large-signal dynamic response of the VSI are studied. Experimental results show that the inverter can reach the steady state in two switching actions after the inverter is subject to large-signal input and output disturbances.