EPE Association: EPE-PEMC 2004

EPE-PEMC 2004 - Topic 12-2: FACTS
You are here: EPE Documents > 04 - EPE-PEMC Conference Proceedings > EPE-PEMC 2004 - Conference > EPE-PEMC 2004 - Topic 12: POWER ELECTRONICS IN GENERATION, TRANSMISSION AND DISTRIBUTION OF ELECTRICAL ENERGY > EPE-PEMC 2004 - Topic 12-2: FACTS

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   A Design Guideline For Dynamic Voltage Restorers
By Otoni Nobrega Neto, Luis Fernando Correia Pimentel, Marcelo Cabral Cavalcanti, Francisco De Assis Dos Santos Neves, C. L. Costa, W. B. Dos Santos [View]
[Download]

Abstract: This paper presents a design guideline for dynamic voltage restorers. Using the cost algorithm in MATLAB assisted by the algorithm in Alternative Transients Program (ATP) for the simulation of electric systems including each functional block of a Dynamic Voltage Restorer (DVR), the best option for each possibility is achieved. Based on the results of the investigation, a cost-effective voltage restoration system is then obtained. The proposed design method is used to test four different DVR for a sensitive load in an electric system in Brazil.

   A Study Of Uncontrolled And Controlled Rectifier In The Dynamic Voltage Restorer
By Otoni Nobrega Neto, Andre Gustavo H. Accioly, Marcelo Cabral Cavalcanti, Francisco De Assis Dos Santos Neves, S. F. Da Silva, W. B. Dos Santos [View]
[Download]

Abstract: The paper presents a comparative study of uncontrolled and controlled rectifiers in the Dynamic Voltage Restorer (DVR). To verify the comparative study, an algorithm in Alternative Transients Program (ATP) was developed for the simulation of utility lines including each functional block of a DVR. Vector control is used for the controlled rectifier in such a way that the equipment protects effectively the sensitive load.

   Applications Of High Voltage Power Electronics Converters In Transmission Network
By Grzegorz Blajszczak [View]
[Download]

Abstract: The paper presents applications of medium voltage power electronic converters for different ancillary services. A short description of these services is provided for better explanation of the converter functions. Comparison to traditional solutions and benefits are also discussed.

   Interline Power Flow Controllers - Energetic Properties
By Ryszard Strzelecki, Przemyslaw Smereczynski, Grzegorz Benysek [View]
[Download]

Abstract: To improve energy quality in distributed power systems; many different solutions there are implemented, for example; i) Unified Power Flow Controllers (UPFC); ii) Unified Power Quality Conditioners (UPQC); iii) Interline Power Flow Controllers (IPFC). Interline Power Flow Controllers are the classical series or series-parallel filters applied to given number of independent lines with common, for all lines, DC element. Their possible functions are enlarging and include power flow control between lines, reactive power compensation and distributed power system stability improvement. In the paper we will show basic properties of the IPFCs, in steady states for given number of transmission Systems energy flow paths and finally results of theoretical considerations with simulations will be proved.

   Power Exchange Between A Generator And An Electrical Power Grid Through A Natural Commutated Matrix Converter
By Rasool Kazemzadeh, Alain Berthon, Jean-Marie Kauffmann [View]
[Download]

Abstract: Current research deals with introducing the “active generator”, which runs on turbine speed, and studying its behaviour when it is connected to a three phase power grid which has its own frequency different from turbine frequency. In this regard the set composed of a four phase synchronous generator and a natural commutated matrix converter made with thyristor, is called active generator. By representation of a simplified circuit at fundamental frequencies and an approximated equivalent single phase circuit for the system view from grid side, active and reactive power axis for equivalent circuit will be determined; in these axis it is available to investigate the domain and variation manner of the active and reactive power. Instantaneous power transferring has been studied and its oscillation frequency is analyzed.

   Single Phase Active Power Filter With Digital And Analog Control - A Comparison
By Dirk Lindeke, Samir Ahmad Mussa, Fabiana Poettker De Souza, Ivo Barbi [View]
[Download]

Abstract: This article presents a comparison of a 1kVA Single Phase Active Power Filter (APF) with analog control and with digital control using DSP. The parallel APF should compensate for the non-linear loads harmonic currents as well as for the fundamental loads current phase displacement. The design procedure is presented, following by the experimental results.

   STATCOM-Based Damping Stabilizers For Power System Stability Enhancement
By M. A. Abido(sa), Ch. Weindl(de), G. Herold(de) [View]
[Download]

Abstract: Power system stability enhancement via STATCOM-bas ed stabilizers is thoroughly investigated in this paper. This study presents a singular value decomposition (SVD) based approach to assess and measure the controllability of the poorly damped electromechanical modes by different control inputs of a STATCOM. The Coordination among the proposed damping stabilizers and the STATCOM internal AC and DC voltage controllers has been taken into consideration. The design problem of STATCOM-based stabilizers is formulated as an optimization problem. For coordination purposes, a time domain-based multiobjective function to improve the system stability as well as AC and DC voltage regulation is proposed. Then, a real-coded genetic algorithm (RCGA) is employed to search for optimal stabilizer parameters. This aims to enhance both rotor angle stability and voltage regulation of the power system. The proposed stabilizers are tested on a weakly connected power system with different loading conditions. The nonlinear simulation results show the effectiveness and robustness of the proposed control schemes over a wide range of loading conditions.

   Using Load Zero Sequence Voltage To Eliminate Source Zero Sequence Current
By M. Fathi [View]
[Download]

Abstract: The zero sequence voltage of the load affects the source during the process of instantaneous inactive or reactive power compensation. Different approaches have been used to overcome this issue. This synopsis initially reviews the minimization method, which divides the load currents into its active and reactive components and find them by solving an optimization problem. The active current is supplied by the source, while the reactive current is managed by the compensator. However, when load voltages contain zero sequence component, then zero sequence current is imposed to the source. To tackle this issue, load zero sequence voltage is measured and a complementary way is presented such that eliminates the source zero sequence current. The converter power circuit as well as the control circuit is simulated to show the effectiveness of the approach.

EPE-PEMC 2004 - Topic 12-2: FACTS
You are here: EPE Documents > 04 - EPE-PEMC Conference Proceedings > EPE-PEMC 2004 - Conference > EPE-PEMC 2004 - Topic 12: POWER ELECTRONICS IN GENERATION, TRANSMISSION AND DISTRIBUTION OF ELECTRICAL ENERGY > EPE-PEMC 2004 - Topic 12-2: FACTS
	[return to parent folder]

	A Design Guideline For Dynamic Voltage Restorers By Otoni Nobrega Neto, Luis Fernando Correia Pimentel, Marcelo Cabral Cavalcanti, Francisco De Assis Dos Santos Neves, C. L. Costa, W. B. Dos Santos	[View] [Download]
Abstract: This paper presents a design guideline for dynamic voltage restorers. Using the cost algorithm in MATLAB assisted by the algorithm in Alternative Transients Program (ATP) for the simulation of electric systems including each functional block of a Dynamic Voltage Restorer (DVR), the best option for each possibility is achieved. Based on the results of the investigation, a cost-effective voltage restoration system is then obtained. The proposed design method is used to test four different DVR for a sensitive load in an electric system in Brazil.

	A Study Of Uncontrolled And Controlled Rectifier In The Dynamic Voltage Restorer By Otoni Nobrega Neto, Andre Gustavo H. Accioly, Marcelo Cabral Cavalcanti, Francisco De Assis Dos Santos Neves, S. F. Da Silva, W. B. Dos Santos	[View] [Download]
Abstract: The paper presents a comparative study of uncontrolled and controlled rectifiers in the Dynamic Voltage Restorer (DVR). To verify the comparative study, an algorithm in Alternative Transients Program (ATP) was developed for the simulation of utility lines including each functional block of a DVR. Vector control is used for the controlled rectifier in such a way that the equipment protects effectively the sensitive load.

	Applications Of High Voltage Power Electronics Converters In Transmission Network By Grzegorz Blajszczak	[View] [Download]
Abstract: The paper presents applications of medium voltage power electronic converters for different ancillary services. A short description of these services is provided for better explanation of the converter functions. Comparison to traditional solutions and benefits are also discussed.

	Interline Power Flow Controllers - Energetic Properties By Ryszard Strzelecki, Przemyslaw Smereczynski, Grzegorz Benysek	[View] [Download]
Abstract: To improve energy quality in distributed power systems; many different solutions there are implemented, for example; i) Unified Power Flow Controllers (UPFC); ii) Unified Power Quality Conditioners (UPQC); iii) Interline Power Flow Controllers (IPFC). Interline Power Flow Controllers are the classical series or series-parallel filters applied to given number of independent lines with common, for all lines, DC element. Their possible functions are enlarging and include power flow control between lines, reactive power compensation and distributed power system stability improvement. In the paper we will show basic properties of the IPFCs, in steady states for given number of transmission Systems energy flow paths and finally results of theoretical considerations with simulations will be proved.

	Power Exchange Between A Generator And An Electrical Power Grid Through A Natural Commutated Matrix Converter By Rasool Kazemzadeh, Alain Berthon, Jean-Marie Kauffmann	[View] [Download]
Abstract: Current research deals with introducing the “active generator”, which runs on turbine speed, and studying its behaviour when it is connected to a three phase power grid which has its own frequency different from turbine frequency. In this regard the set composed of a four phase synchronous generator and a natural commutated matrix converter made with thyristor, is called active generator. By representation of a simplified circuit at fundamental frequencies and an approximated equivalent single phase circuit for the system view from grid side, active and reactive power axis for equivalent circuit will be determined; in these axis it is available to investigate the domain and variation manner of the active and reactive power. Instantaneous power transferring has been studied and its oscillation frequency is analyzed.

	Single Phase Active Power Filter With Digital And Analog Control - A Comparison By Dirk Lindeke, Samir Ahmad Mussa, Fabiana Poettker De Souza, Ivo Barbi	[View] [Download]
Abstract: This article presents a comparison of a 1kVA Single Phase Active Power Filter (APF) with analog control and with digital control using DSP. The parallel APF should compensate for the non-linear loads harmonic currents as well as for the fundamental loads current phase displacement. The design procedure is presented, following by the experimental results.

	STATCOM-Based Damping Stabilizers For Power System Stability Enhancement By M. A. Abido(sa), Ch. Weindl(de), G. Herold(de)	[View] [Download]
Abstract: Power system stability enhancement via STATCOM-bas ed stabilizers is thoroughly investigated in this paper. This study presents a singular value decomposition (SVD) based approach to assess and measure the controllability of the poorly damped electromechanical modes by different control inputs of a STATCOM. The Coordination among the proposed damping stabilizers and the STATCOM internal AC and DC voltage controllers has been taken into consideration. The design problem of STATCOM-based stabilizers is formulated as an optimization problem. For coordination purposes, a time domain-based multiobjective function to improve the system stability as well as AC and DC voltage regulation is proposed. Then, a real-coded genetic algorithm (RCGA) is employed to search for optimal stabilizer parameters. This aims to enhance both rotor angle stability and voltage regulation of the power system. The proposed stabilizers are tested on a weakly connected power system with different loading conditions. The nonlinear simulation results show the effectiveness and robustness of the proposed control schemes over a wide range of loading conditions.

	Using Load Zero Sequence Voltage To Eliminate Source Zero Sequence Current By M. Fathi	[View] [Download]
Abstract: The zero sequence voltage of the load affects the source during the process of instantaneous inactive or reactive power compensation. Different approaches have been used to overcome this issue. This synopsis initially reviews the minimization method, which divides the load currents into its active and reactive components and find them by solving an optimization problem. The active current is supplied by the source, while the reactive current is managed by the compensator. However, when load voltages contain zero sequence component, then zero sequence current is imposed to the source. To tackle this issue, load zero sequence voltage is measured and a complementary way is presented such that eliminates the source zero sequence current. The converter power circuit as well as the control circuit is simulated to show the effectiveness of the approach.