The paper describes an approach to cooperative operation of a system of distributed harmonic and ... more The paper describes an approach to cooperative operation of a system of distributed harmonic and reactive compensators acting in the same network. The goal is to optimize the network operation at a given port by fully exploiting the capability of the various compensation units. The background for cooperative operation lays on the conservation of instantaneous complex power, a quantity which envelopes power and energy information of electrical networks and keeps validity even in presence of nonsinusoidal voltage supply and distorting loads. Based on this principle, a control approach is developed which applies to static reactive compensators (SVC) as well as to active power filters (APF). In particular, the high-power capability of SVC is combined with the fast response of APF to achieve full compensation of reactive power and harmonic currents. Single-phase and three-phase simulations demonstrate the capability of the proposed compensation approach.
Origin of pollution All these problems can be traced to a common origin, namely, excessive distor... more Origin of pollution All these problems can be traced to a common origin, namely, excessive distortion of the current or voltage of the power supplied to the consumer by the power distribution system. This distortion has several detrimental effects, includ-ing overheating of the ...
In this paper, a general-purpose fuzzy controller for DC-DC converters is investigated. Based on ... more In this paper, a general-purpose fuzzy controller for DC-DC converters is investigated. Based on a qualitative description of the system to be controlled, fuzzy controllers are capable of good performances even for those systems where linear control techniques fail, e.g. when a mathematical description is not available or in the presence of wide parameter variations. The presented approach is general and can be applied to any DC-DC converter topologies. Controller implementation is relatively simple and can guarantee a small-signal response as fast and stable as for other standard regulators and an improved large-signal response. Simulation results of buck-boost and Sepic converters show control potentialities
... Moreover, in [3][5], [8], and [9], some advan-tages of the digital implementation have been ... more ... Moreover, in [3][5], [8], and [9], some advan-tages of the digital implementation have been investigated, and, more specifically, digital techniques aimed to remove the output voltage ripple at twice the line frequency have been ... A predictive-type current control has been ...
A general-purpose sliding-mode controller is described, which can be applied to most DC-DC power ... more A general-purpose sliding-mode controller is described, which can be applied to most DC-DC power converter topologies. It has the same circuit complexity as standard current-mode controllers, but provides extreme robustness and speed of response against supply, load, and parameter variations. Moreover, contrary to other sliding-mode techniques, the proposed solution features constant switching frequency in the steady state, synchronization to external triggers, and absence of steady-state errors in the output voltage
A pulsewidth modulation (PWM) control technique suitable for fully controlled three-phase ac/dc c... more A pulsewidth modulation (PWM) control technique suitable for fully controlled three-phase ac/dc converters is analyzed, which gives sinusoidal input currents and ideally smoothed dc voltage. The technique allows four-quadrant operation and full-range control of the input power factor. An extension to a simplified converter scheme, capable of onequadrant operation, is also considered. Operation of the converter is analyzed under both ideal and actual conditions. Control implementation and design criteria are discussed and experimental results are reported.
A soft-switching single-ended adac converter that is In spite of its simplicity, the converter of... more A soft-switching single-ended adac converter that is In spite of its simplicity, the converter offers excellent perfor-High-frequency supply to the lamp sinusoidal and in-phase supply current easy control of lamp power high efficiency due to soft switching at both turnon and Steady-state operation, control characteristics, and design criteria are discussed, and experimental results are reported, with input and output circuit performance, component stress, and efficiency. suitable for high-frequency electronic lamp ballast is described. mance with regard to load and supply, ensuring the following: turnoff. Fig. 1. Circuit diagram.
' ince 1992 all borders ofthe internal market of the European Union (EU)... more ' ince 1992 all borders ofthe internal market of the European Union (EU) have been eliminated. Persons, goods, services and capitals move free through all EU Member Stares. In order to eliminate the technical barriers hampering the trades between the Member ...
A single-switch fully-controlled three-phase rectifier is presented, which provides high AC power... more A single-switch fully-controlled three-phase rectifier is presented, which provides high AC power factor and wide DC voltage regulation while allowing high-frequency insulation. Owing to one-cycle control, output voltage ripple is also eliminated. Moreover, switch voltage stress is limited by a lossless clamper circuit, resulting in safe operation and high efficiency
... IEEE-IAS &.Meet., San Diego, Oct 1989, [3] pp. 1037-1044. [ 101 HWVan Der Bioeck,... more ... IEEE-IAS &.Meet., San Diego, Oct 1989, [3] pp. 1037-1044. [ 101 HWVan Der Bioeck, H.Ch.Skudelny and G.Stanke: "Analysis and Realization of a Pulse Width Modulator Based on Voltage Space Vectors". IEEE-IAS 86, [ 111 S.Ogasawara, H.Akagi and A.Nabae: "A Novel PWM ...
An active power filter is presented using an impressed current converter and an inductive-capacit... more An active power filter is presented using an impressed current converter and an inductive-capacitive energy storage circuit, also including a switching section. This solution allows independent choice of the converter configuration and of the kind of the storage system which, in this particular case, is mainly capacitive. The theory of operation is analyzed, together with control strategy and design criteria. Experimental results are reported.
A resonant DC link scheme for soft-switched inverters is proposed, where the link oscillation can... more A resonant DC link scheme for soft-switched inverters is proposed, where the link oscillation can be synchronized with inverter modulation. The scheme is able to operate with reduced commutation losses at a high switching frequency. Synchronization compatibility allows the development of suitable modulation techniques, which ensure improved waveform accuracy. The system performance and control strategies are verified both by simulation and by experimental tests, confirming the effectiveness of the proposed scheme.>
A soft-switching single-ended AC/AC converter suitable for high-frequency electronic lamp ballast... more A soft-switching single-ended AC/AC converter suitable for high-frequency electronic lamp ballast is described. In spite of its simplicity, the converter offers excellent performances both on load and supply side, ensuring: high-frequency supply to the lamp; sinusoidal and in-phase supply current; easy control of lamp power; high-efficiency due to the soft switching both at turn-on and turn-off. Steady-state operation, control characteristics and design criteria are discussed, and experimental results reported, showing input and output circuit performance, component stress, and efficiency.>
... 1, JANUARY 1997 79 General-Purpose Fuzzy Controller for DCDC Converters ... Index TermsFuzz... more ... 1, JANUARY 1997 79 General-Purpose Fuzzy Controller for DCDC Converters ... Index TermsFuzzy logic, control techniques, dcdc converters I. INTRODUCTION DC-DCCONVERTERS are an intriguing subject from the control point of view due to their intrinsic ...
... Predictive control [4], [6], [7], [9] gives optimum perfor-mance in terms of both response ti... more ... Predictive control [4], [6], [7], [9] gives optimum perfor-mance in terms of both response time and accuracy, but it involves nonnegligible calculations and requires a good knowl ... Thus the actualcurrent waveform is not only determined by the hysteresis control: depending on ...
A bstract-A hysteresis control method for three-phase, current-controlled, VSI PWM inverters is p... more A bstract-A hysteresis control method for three-phase, current-controlled, VSI PWM inverters is presented, characterized by constant switching frequency. It is based on the phase-interference minimization technique presented in a previous paper but avoids the need to know load parameters.
Abstract A general control method that fully utilizes the inherent capability of AC-fed PWM conve... more Abstract A general control method that fully utilizes the inherent capability of AC-fed PWM converters to compensate for reactive and harmonic currents adsorbed by other loads is presented. For this purpose, suitable definitions of instantaneous active and reactive ...
Control techniques that optimize the behaviour of pulse-width modulation (PWM) rectifiers for mag... more Control techniques that optimize the behaviour of pulse-width modulation (PWM) rectifiers for magnet supplies are examined. Different control strategies, both with preprogrammed and variable switching patterns, are examined and compared in terms of optimization of the system performance. Optimum digital PWM, multilevel delta modulation, and hybrid PWM/delta techniques are analyzed. The validity of the control methods was verified by simulation and experimental tests on a 60 kW prototype. It was observed that, in practice, digital PWM techniques are better suited for optimizing the AC converter performance, while delta modulation techniques give better results in terms of DC current and voltage distortion.>
A PWM rectifier, including an uncontrolled rectifier and a Cuk power converter stage driven by a ... more A PWM rectifier, including an uncontrolled rectifier and a Cuk power converter stage driven by a sliding-mode controller, is described. Similar to other high-quality rectifiers, this solution allows low distortion and in-phase line current. Due to the sliding-mode control, a fast and stable response is achieved, in spite of the large output filter. Control complexity is the same as standard current-mode controls, Converter analysis, design criteria, and experimental results are presented
A PWM rectifier including an uncontrolled rectifier and a Cuk converter stage driven by a sliding... more A PWM rectifier including an uncontrolled rectifier and a Cuk converter stage driven by a sliding mode controller is described. Like other high-quality rectifiers, this solution allows low-distorted and in-phase line current. Moreover, due to the sliding mode control, fast and stable response is achieved, in spite of the large output filter. Control complexity is the same as that of
The paper describes an approach to cooperative operation of a system of distributed harmonic and ... more The paper describes an approach to cooperative operation of a system of distributed harmonic and reactive compensators acting in the same network. The goal is to optimize the network operation at a given port by fully exploiting the capability of the various compensation units. The background for cooperative operation lays on the conservation of instantaneous complex power, a quantity which envelopes power and energy information of electrical networks and keeps validity even in presence of nonsinusoidal voltage supply and distorting loads. Based on this principle, a control approach is developed which applies to static reactive compensators (SVC) as well as to active power filters (APF). In particular, the high-power capability of SVC is combined with the fast response of APF to achieve full compensation of reactive power and harmonic currents. Single-phase and three-phase simulations demonstrate the capability of the proposed compensation approach.
Origin of pollution All these problems can be traced to a common origin, namely, excessive distor... more Origin of pollution All these problems can be traced to a common origin, namely, excessive distortion of the current or voltage of the power supplied to the consumer by the power distribution system. This distortion has several detrimental effects, includ-ing overheating of the ...
In this paper, a general-purpose fuzzy controller for DC-DC converters is investigated. Based on ... more In this paper, a general-purpose fuzzy controller for DC-DC converters is investigated. Based on a qualitative description of the system to be controlled, fuzzy controllers are capable of good performances even for those systems where linear control techniques fail, e.g. when a mathematical description is not available or in the presence of wide parameter variations. The presented approach is general and can be applied to any DC-DC converter topologies. Controller implementation is relatively simple and can guarantee a small-signal response as fast and stable as for other standard regulators and an improved large-signal response. Simulation results of buck-boost and Sepic converters show control potentialities
... Moreover, in [3][5], [8], and [9], some advan-tages of the digital implementation have been ... more ... Moreover, in [3][5], [8], and [9], some advan-tages of the digital implementation have been investigated, and, more specifically, digital techniques aimed to remove the output voltage ripple at twice the line frequency have been ... A predictive-type current control has been ...
A general-purpose sliding-mode controller is described, which can be applied to most DC-DC power ... more A general-purpose sliding-mode controller is described, which can be applied to most DC-DC power converter topologies. It has the same circuit complexity as standard current-mode controllers, but provides extreme robustness and speed of response against supply, load, and parameter variations. Moreover, contrary to other sliding-mode techniques, the proposed solution features constant switching frequency in the steady state, synchronization to external triggers, and absence of steady-state errors in the output voltage
A pulsewidth modulation (PWM) control technique suitable for fully controlled three-phase ac/dc c... more A pulsewidth modulation (PWM) control technique suitable for fully controlled three-phase ac/dc converters is analyzed, which gives sinusoidal input currents and ideally smoothed dc voltage. The technique allows four-quadrant operation and full-range control of the input power factor. An extension to a simplified converter scheme, capable of onequadrant operation, is also considered. Operation of the converter is analyzed under both ideal and actual conditions. Control implementation and design criteria are discussed and experimental results are reported.
A soft-switching single-ended adac converter that is In spite of its simplicity, the converter of... more A soft-switching single-ended adac converter that is In spite of its simplicity, the converter offers excellent perfor-High-frequency supply to the lamp sinusoidal and in-phase supply current easy control of lamp power high efficiency due to soft switching at both turnon and Steady-state operation, control characteristics, and design criteria are discussed, and experimental results are reported, with input and output circuit performance, component stress, and efficiency. suitable for high-frequency electronic lamp ballast is described. mance with regard to load and supply, ensuring the following: turnoff. Fig. 1. Circuit diagram.
' ince 1992 all borders ofthe internal market of the European Union (EU)... more ' ince 1992 all borders ofthe internal market of the European Union (EU) have been eliminated. Persons, goods, services and capitals move free through all EU Member Stares. In order to eliminate the technical barriers hampering the trades between the Member ...
A single-switch fully-controlled three-phase rectifier is presented, which provides high AC power... more A single-switch fully-controlled three-phase rectifier is presented, which provides high AC power factor and wide DC voltage regulation while allowing high-frequency insulation. Owing to one-cycle control, output voltage ripple is also eliminated. Moreover, switch voltage stress is limited by a lossless clamper circuit, resulting in safe operation and high efficiency
... IEEE-IAS &.Meet., San Diego, Oct 1989, [3] pp. 1037-1044. [ 101 HWVan Der Bioeck,... more ... IEEE-IAS &.Meet., San Diego, Oct 1989, [3] pp. 1037-1044. [ 101 HWVan Der Bioeck, H.Ch.Skudelny and G.Stanke: "Analysis and Realization of a Pulse Width Modulator Based on Voltage Space Vectors". IEEE-IAS 86, [ 111 S.Ogasawara, H.Akagi and A.Nabae: "A Novel PWM ...
An active power filter is presented using an impressed current converter and an inductive-capacit... more An active power filter is presented using an impressed current converter and an inductive-capacitive energy storage circuit, also including a switching section. This solution allows independent choice of the converter configuration and of the kind of the storage system which, in this particular case, is mainly capacitive. The theory of operation is analyzed, together with control strategy and design criteria. Experimental results are reported.
A resonant DC link scheme for soft-switched inverters is proposed, where the link oscillation can... more A resonant DC link scheme for soft-switched inverters is proposed, where the link oscillation can be synchronized with inverter modulation. The scheme is able to operate with reduced commutation losses at a high switching frequency. Synchronization compatibility allows the development of suitable modulation techniques, which ensure improved waveform accuracy. The system performance and control strategies are verified both by simulation and by experimental tests, confirming the effectiveness of the proposed scheme.>
A soft-switching single-ended AC/AC converter suitable for high-frequency electronic lamp ballast... more A soft-switching single-ended AC/AC converter suitable for high-frequency electronic lamp ballast is described. In spite of its simplicity, the converter offers excellent performances both on load and supply side, ensuring: high-frequency supply to the lamp; sinusoidal and in-phase supply current; easy control of lamp power; high-efficiency due to the soft switching both at turn-on and turn-off. Steady-state operation, control characteristics and design criteria are discussed, and experimental results reported, showing input and output circuit performance, component stress, and efficiency.>
... 1, JANUARY 1997 79 General-Purpose Fuzzy Controller for DCDC Converters ... Index TermsFuzz... more ... 1, JANUARY 1997 79 General-Purpose Fuzzy Controller for DCDC Converters ... Index TermsFuzzy logic, control techniques, dcdc converters I. INTRODUCTION DC-DCCONVERTERS are an intriguing subject from the control point of view due to their intrinsic ...
... Predictive control [4], [6], [7], [9] gives optimum perfor-mance in terms of both response ti... more ... Predictive control [4], [6], [7], [9] gives optimum perfor-mance in terms of both response time and accuracy, but it involves nonnegligible calculations and requires a good knowl ... Thus the actualcurrent waveform is not only determined by the hysteresis control: depending on ...
A bstract-A hysteresis control method for three-phase, current-controlled, VSI PWM inverters is p... more A bstract-A hysteresis control method for three-phase, current-controlled, VSI PWM inverters is presented, characterized by constant switching frequency. It is based on the phase-interference minimization technique presented in a previous paper but avoids the need to know load parameters.
Abstract A general control method that fully utilizes the inherent capability of AC-fed PWM conve... more Abstract A general control method that fully utilizes the inherent capability of AC-fed PWM converters to compensate for reactive and harmonic currents adsorbed by other loads is presented. For this purpose, suitable definitions of instantaneous active and reactive ...
Control techniques that optimize the behaviour of pulse-width modulation (PWM) rectifiers for mag... more Control techniques that optimize the behaviour of pulse-width modulation (PWM) rectifiers for magnet supplies are examined. Different control strategies, both with preprogrammed and variable switching patterns, are examined and compared in terms of optimization of the system performance. Optimum digital PWM, multilevel delta modulation, and hybrid PWM/delta techniques are analyzed. The validity of the control methods was verified by simulation and experimental tests on a 60 kW prototype. It was observed that, in practice, digital PWM techniques are better suited for optimizing the AC converter performance, while delta modulation techniques give better results in terms of DC current and voltage distortion.>
A PWM rectifier, including an uncontrolled rectifier and a Cuk power converter stage driven by a ... more A PWM rectifier, including an uncontrolled rectifier and a Cuk power converter stage driven by a sliding-mode controller, is described. Similar to other high-quality rectifiers, this solution allows low distortion and in-phase line current. Due to the sliding-mode control, a fast and stable response is achieved, in spite of the large output filter. Control complexity is the same as standard current-mode controls, Converter analysis, design criteria, and experimental results are presented
A PWM rectifier including an uncontrolled rectifier and a Cuk converter stage driven by a sliding... more A PWM rectifier including an uncontrolled rectifier and a Cuk converter stage driven by a sliding mode controller is described. Like other high-quality rectifiers, this solution allows low-distorted and in-phase line current. Moreover, due to the sliding mode control, fast and stable response is achieved, in spite of the large output filter. Control complexity is the same as that of
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