EPE Association: EPE 1997 – 90: Dialogue Session DS8d: HARMONICS AND ACTIVE FILTERS

EPE 1997 – 90: Dialogue Session DS8d: HARMONICS AND ACTIVE FILTERS - CONTROL
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 1997 - Conference > EPE 1997 – 90: Dialogue Session DS8d: HARMONICS AND ACTIVE FILTERS - CONTROL

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   A NEW SYNCHRONIZATION METHOD OF A PARALLEL ACTIVE POWER FILTER
By D. Nedeljkovic; V. Ambrozic; J. Nastran [View]
[Download]

Abstract: An improved method of current reference dctennination for a three-phase parallel active power filter is presented. Besides the response of filter current reference to the load current change, synchronization to the network is considered. To avoid usual problems with synchronization relying upon line voltage zero-cross detection, a new approach with line voltage fundamental hannonic calculation is applied. Theoretical basis of the idea is proven and results of the corresponding tests with a three-phase parallel active power filter are shown. All processing tasks are perfonned by a 32-bit microcontroller, which controls filter's power stage, based on time-discrete triggering principle.

   SIMPLIFIED CONTROL METHOD FOR SHUNT ACTIVE HARMONIC FILTER
By Y. Liu; P. J. Unsworth [View]
[Download]

Abstract: In this paper a shunt active filter with a simplified method for 3-phase nonlinear load harmonics and reactive currents filtering is presented. An important characteristic of this method is its simple control algorithm based on the balance of active power flow. Only source currents need to be sampled to provide information for harmonic and reactive current tlltering. A prototype has been developed to show the validity of this method and results are given to demonstrate performance.

   SEARCHING FOR THE BETTER TOPOLOGY AND CONTROL STRATEGY IN HYBRID POWER FILTERS
By A. A. Bayod Rujula; J. Sallan Arasanz; M. Sanz Badia; A. Llombart Estopinan [View]
[Download]

Abstract: In tlle paper a generalisation of the different topologies and control strategies of hybrid filters is presented. The electrical analysis, filtering characteristics and size of the active unit are discussed theoretically and several situations are simulated trying to obtain both the current in tlle source and the voltage at tlle pcc sinusoidal in the most efficient manner.

   PWM RECTIFIER AND ACTIVE FILTER WITH SLIDING-MODE CONTROL
By Stanislaw PIROG [View]
[Download]

Abstract: The paper describes the application of the sliding-mode eontrol of a single-phase PMW inverter, operated either as an active filter or a rectifier with sinusoidal input current. Presented control method does not require determination by measurements of the non-active load current component. The paper includes the description of a way of shaping the waveform of the source current, utilising a current hysteresis regulator with constant or variable width of the hysteresis loop.

   A SHUNT ACTIVE FILTER WITH A SLIDING MODE CONTROL CIRCUIT
By K. Sahnouni; O. Lapierre; S. Jones; A. Berthon [View]
[Download]

Abstract: The paper describes a shunt active filter with an output LC filter and a sliding mode control circuit. The active filter laws, based on the sliding mode control theory, are derived to reduce voltage distortion at the connection point of the non-linear load and to cancel harmonic components from the system side. A switching optimisation method is introduced to minimise the switching frequency. Simulation results show an excellent reduction of current and voltage distortion for a low switching frequency. This control circuit is tested on an IGBT active filter and experimental results show the effectiveness of the sliding mode controlled active filter.

   NEW CONTROL METHOD OF HARMONIC CURRENT COMPENSATION USING INDIVIDUAL ROTATING P-Q FRAME OF CORRESPONDING FREQUENCY
By M Yano; S. Kuramocl:ri; N.Nanaumi [View]
[Download]

Abstract: New compensation method of specific number hannonic current using individual rotating p-q frame of corresponding frequency is proposed, and its excellent compensation effects are explained in comparison with conventional versatile compens.:1tion. The addition of integral controllers of de components at the rotating frame is shown effective to decrease the time lag of control, and to attain good compensation. Furthennore preferential compensation of specific number hannonic current is also realized and experimental data with a model are presented.

   VECTOR CONTROL STRATEGY OF A HARMONIC AND REACTIVE POWER COMPENSATOR
By R. S. Pena; R. Cardenas; G. M. Asher; J. C. Clare [View]
[Download]

Abstract: Simulation results of a three phase voltage-fed current-regulated PWM inverter, working as a shunt active filter for power conditioning are presented. The inverter injects harmonics and reactive power into the grid to compensate the reactive power demand and harmonic currents generated by a six-pulse thyristor rectifier. The strategy uses the concept of instantaneous reactive power to determine the reactive power current and the harmonic currents to be compensated. The current control is carried out in a synchronously rotating reference frame. The reference currents for the compensator are obtained either using a standard second order filter or a Kalman filter.

   VARIABLE STRUCTURE CURRENT CONTROL IN CURRENT CONTROLLED VOLTAGE SOURCED RECTIFIER
By Chee W. Lu; Alasdair C. Renfrew [View]
[Download]

Abstract: A new variable structure current control method for current controlled voltage sourced rectifiers is presented in this paper. This scheme is based on space vector techniques and provides optimal control in terms of switching frequency, switching losses, ohmic losses and harmonic current distortion. The control algorithm is described in detail. Advantages and the feasibility of the proposed scheme are also verified by extensive case studies.

   AN ACTIVE POWER FILTER AND ZERO SEQUENCE HARMONICS COMPONENTS COMPENSATOR CONTROL CIRCUIT
By P. Verdelho [View]
[Download]

Abstract: This paper presents a shunt active power filter control circuit for a four wire supply network. The system is implemented with a four wire PWM voltage converter connected to the AC mains with accessible neutral. Mains currents harmonics can be compensated. The system also compensates the mains currents harmonics that constitute a zero sequence component. The control circuit presented is implemented in system coordinates being of very easy implementation. Expressions for the controllers synthesis are derived.

   A Space Vector-Based Deadbeat Controller For Shunt Active Power Filters
By L. J. Xiao; L. Zhang [View]
[Download]

Abstract: This paper presents a space vector -based deadbeat control scheme for eliminating harmonics in the power systems using a shunt active filter. A digital simulation study of the proposed control scheme as applied to a small power system supplying a phase-controlled AC-DC converter has been carried out. Results obtained under various operating conditions are presented. It is shown that the controller gives good performance in harmonic compensation, this, in turn, improves greatly the qulity of the supplied power.

EPE 1997 – 90: Dialogue Session DS8d: HARMONICS AND ACTIVE FILTERS - CONTROL
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 1997 - Conference > EPE 1997 – 90: Dialogue Session DS8d: HARMONICS AND ACTIVE FILTERS - CONTROL
	[return to parent folder]

	A NEW SYNCHRONIZATION METHOD OF A PARALLEL ACTIVE POWER FILTER By D. Nedeljkovic; V. Ambrozic; J. Nastran	[View] [Download]
Abstract: An improved method of current reference dctennination for a three-phase parallel active power filter is presented. Besides the response of filter current reference to the load current change, synchronization to the network is considered. To avoid usual problems with synchronization relying upon line voltage zero-cross detection, a new approach with line voltage fundamental hannonic calculation is applied. Theoretical basis of the idea is proven and results of the corresponding tests with a three-phase parallel active power filter are shown. All processing tasks are perfonned by a 32-bit microcontroller, which controls filter's power stage, based on time-discrete triggering principle.

	SIMPLIFIED CONTROL METHOD FOR SHUNT ACTIVE HARMONIC FILTER By Y. Liu; P. J. Unsworth	[View] [Download]
Abstract: In this paper a shunt active filter with a simplified method for 3-phase nonlinear load harmonics and reactive currents filtering is presented. An important characteristic of this method is its simple control algorithm based on the balance of active power flow. Only source currents need to be sampled to provide information for harmonic and reactive current tlltering. A prototype has been developed to show the validity of this method and results are given to demonstrate performance.

	SEARCHING FOR THE BETTER TOPOLOGY AND CONTROL STRATEGY IN HYBRID POWER FILTERS By A. A. Bayod Rujula; J. Sallan Arasanz; M. Sanz Badia; A. Llombart Estopinan	[View] [Download]
Abstract: In tlle paper a generalisation of the different topologies and control strategies of hybrid filters is presented. The electrical analysis, filtering characteristics and size of the active unit are discussed theoretically and several situations are simulated trying to obtain both the current in tlle source and the voltage at tlle pcc sinusoidal in the most efficient manner.

	PWM RECTIFIER AND ACTIVE FILTER WITH SLIDING-MODE CONTROL By Stanislaw PIROG	[View] [Download]
Abstract: The paper describes the application of the sliding-mode eontrol of a single-phase PMW inverter, operated either as an active filter or a rectifier with sinusoidal input current. Presented control method does not require determination by measurements of the non-active load current component. The paper includes the description of a way of shaping the waveform of the source current, utilising a current hysteresis regulator with constant or variable width of the hysteresis loop.

	A SHUNT ACTIVE FILTER WITH A SLIDING MODE CONTROL CIRCUIT By K. Sahnouni; O. Lapierre; S. Jones; A. Berthon	[View] [Download]
Abstract: The paper describes a shunt active filter with an output LC filter and a sliding mode control circuit. The active filter laws, based on the sliding mode control theory, are derived to reduce voltage distortion at the connection point of the non-linear load and to cancel harmonic components from the system side. A switching optimisation method is introduced to minimise the switching frequency. Simulation results show an excellent reduction of current and voltage distortion for a low switching frequency. This control circuit is tested on an IGBT active filter and experimental results show the effectiveness of the sliding mode controlled active filter.

	NEW CONTROL METHOD OF HARMONIC CURRENT COMPENSATION USING INDIVIDUAL ROTATING P-Q FRAME OF CORRESPONDING FREQUENCY By M Yano; S. Kuramocl:ri; N.Nanaumi	[View] [Download]
Abstract: New compensation method of specific number hannonic current using individual rotating p-q frame of corresponding frequency is proposed, and its excellent compensation effects are explained in comparison with conventional versatile compens.:1tion. The addition of integral controllers of de components at the rotating frame is shown effective to decrease the time lag of control, and to attain good compensation. Furthennore preferential compensation of specific number hannonic current is also realized and experimental data with a model are presented.

	VECTOR CONTROL STRATEGY OF A HARMONIC AND REACTIVE POWER COMPENSATOR By R. S. Pena; R. Cardenas; G. M. Asher; J. C. Clare	[View] [Download]
Abstract: Simulation results of a three phase voltage-fed current-regulated PWM inverter, working as a shunt active filter for power conditioning are presented. The inverter injects harmonics and reactive power into the grid to compensate the reactive power demand and harmonic currents generated by a six-pulse thyristor rectifier. The strategy uses the concept of instantaneous reactive power to determine the reactive power current and the harmonic currents to be compensated. The current control is carried out in a synchronously rotating reference frame. The reference currents for the compensator are obtained either using a standard second order filter or a Kalman filter.

	VARIABLE STRUCTURE CURRENT CONTROL IN CURRENT CONTROLLED VOLTAGE SOURCED RECTIFIER By Chee W. Lu; Alasdair C. Renfrew	[View] [Download]
Abstract: A new variable structure current control method for current controlled voltage sourced rectifiers is presented in this paper. This scheme is based on space vector techniques and provides optimal control in terms of switching frequency, switching losses, ohmic losses and harmonic current distortion. The control algorithm is described in detail. Advantages and the feasibility of the proposed scheme are also verified by extensive case studies.

	AN ACTIVE POWER FILTER AND ZERO SEQUENCE HARMONICS COMPONENTS COMPENSATOR CONTROL CIRCUIT By P. Verdelho	[View] [Download]
Abstract: This paper presents a shunt active power filter control circuit for a four wire supply network. The system is implemented with a four wire PWM voltage converter connected to the AC mains with accessible neutral. Mains currents harmonics can be compensated. The system also compensates the mains currents harmonics that constitute a zero sequence component. The control circuit presented is implemented in system coordinates being of very easy implementation. Expressions for the controllers synthesis are derived.

	A Space Vector-Based Deadbeat Controller For Shunt Active Power Filters By L. J. Xiao; L. Zhang	[View] [Download]
Abstract: This paper presents a space vector -based deadbeat control scheme for eliminating harmonics in the power systems using a shunt active filter. A digital simulation study of the proposed control scheme as applied to a small power system supplying a phase-controlled AC-DC converter has been carried out. Results obtained under various operating conditions are presented. It is shown that the controller gives good performance in harmonic compensation, this, in turn, improves greatly the qulity of the supplied power.