EPE Association: EPE 1995 - 16 - Lecture Session L4d: FACTS

EPE 1995 - 16 - Lecture Session L4d: FACTS
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   SIMULATION AND CONTROL TECHNIQUE OF FACTS
By B. Mpanda-Mabwe; M. Crappe; J. Trecat; M. Renglet; B. Delfino; G.B. Denegri; M. Invernizzi [View]
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Abstract: Advanced series compensation allows to continously modify the equivalent reactance of ties-lines between interconnected areas. This paper is dealing with modelling and simulation of Flexible Alternate Current Transmission Systems using well known softwares. The benefits of ASC are investigated in order to allow a secure control of energy interchange under emergency conditions. Different control techniques are proposed to achieve this task.

   A UNIFIED POWER FLOW CONTROLLER MODEL FOR THE ELECTROMAGNETIC TRANSIENTS PROGRAM
By E. Joncquel; X. Lombard [View]
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Abstract: Following its research into FACTS (Flexible AC Transmission System), Electricite de France has decided to install a UPFC (Unified Power Flow Controller) prototype, of about 10 MY AR on the 225 kV transmission network. This article presents a model of the UPFC, using EMTP software (ElectroMagnetic Transients Program). In the first place, a model of the prototype is given, emphasizing the shunt part, the two functions of which are separated. Then, some devices whether physical (varistors) or not (control and command) are described, which provide UPFC protection against faults which may occur on the 225 kV network. Finally, the performance of the model is monitored, first in normal circumstances to check dimensioning and performance (response time and harmonics), and then in short-circuit, to check its capability to compensate for the loss of a link on the network being studied. Using this model, the feasibility of a phase shifter meeting the required specifications may be verified, on the one hand, and on the other, its compatibility with current protection devices on the site where it is installed can be investigated.

   CONSIDERING THE FACTS FOR THE PLANNING OF THE VERY HIGH VOLTAGE NETWORK: THE EDF APPROACH
By A. Davriu; B. Lauzanne; P. Mallet; P. Pramayon [View]
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Abstract: In this article, Flexible Alternative Current Transmission System devices (FACTS) are considered among different possibilities allowing a better optimisation of the network development, in a context where respect for the environment becomes one of the most important considerations for any industrial expansion. Facing the difficulty of fmding new right of ways, EDF is searching for alternate means to increase the functionality of the existing network, with a particular concern for power transfert capability. Following a brief presentation of the French Power System, the different concepts used at EDF to judge of the advantages of using FACTS within the network are presented. The representation and description of several FACTS devices in the existing planning tools are presented and the methodologies used to evaluate the economical interest as well as the technical consequences of their implementation are described. Finally, preliminary results are presented, providing a better understanding ofF ACTS benefits for the EDF System.

   CONTROL SYSTEM OF THE STATIC SYSTEM-TIE FREQUENCY CONVERTER MULDENSTEIN INCLUDING OPERATION RESULTS
By H. Weiss [View]
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Abstract: The static system-tie frequency converter - a voltage source DC-link converter - located at Muldenstein / Germany is designed for feeding the railway network. This converter incorporates GTO thyristors on both the 3-phase 50 Hz and the 1-phase 16 2/3 Hz side. Therefore, active power transfer is possible in both directions and additionally, reactive power is adjustable within converter current limits at both the 50 Hz and the 16 2/3 Hz side. In order to minimize GTO switching losses fundamental wave switching is used at the individual GTO inverters. The closed loop control structure of the converter is optimized for this fundamental wave operation principle at both continuous and transient operation. Fourier filters for signal acquisition, fundamental wave vector control and fundamental wave control sets are used for standard (continuous) operation. In case of GTO inverter peak current interactions with pulse blocking (e. g. caused by a line short circuit) transient control measures take command. The converter is capable of feeding the central railway network in a frequency-elastic mode and the decentral railway line in a frequency-locked mode.

EPE 1995 - 16 - Lecture Session L4d: FACTS
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 1995 - Conference > EPE 1995 - 16 - Lecture Session L4d: FACTS
	[return to parent folder]

	SIMULATION AND CONTROL TECHNIQUE OF FACTS By B. Mpanda-Mabwe; M. Crappe; J. Trecat; M. Renglet; B. Delfino; G.B. Denegri; M. Invernizzi	[View] [Download]
Abstract: Advanced series compensation allows to continously modify the equivalent reactance of ties-lines between interconnected areas. This paper is dealing with modelling and simulation of Flexible Alternate Current Transmission Systems using well known softwares. The benefits of ASC are investigated in order to allow a secure control of energy interchange under emergency conditions. Different control techniques are proposed to achieve this task.

	A UNIFIED POWER FLOW CONTROLLER MODEL FOR THE ELECTROMAGNETIC TRANSIENTS PROGRAM By E. Joncquel; X. Lombard	[View] [Download]
Abstract: Following its research into FACTS (Flexible AC Transmission System), Electricite de France has decided to install a UPFC (Unified Power Flow Controller) prototype, of about 10 MY AR on the 225 kV transmission network. This article presents a model of the UPFC, using EMTP software (ElectroMagnetic Transients Program). In the first place, a model of the prototype is given, emphasizing the shunt part, the two functions of which are separated. Then, some devices whether physical (varistors) or not (control and command) are described, which provide UPFC protection against faults which may occur on the 225 kV network. Finally, the performance of the model is monitored, first in normal circumstances to check dimensioning and performance (response time and harmonics), and then in short-circuit, to check its capability to compensate for the loss of a link on the network being studied. Using this model, the feasibility of a phase shifter meeting the required specifications may be verified, on the one hand, and on the other, its compatibility with current protection devices on the site where it is installed can be investigated.

	CONSIDERING THE FACTS FOR THE PLANNING OF THE VERY HIGH VOLTAGE NETWORK: THE EDF APPROACH By A. Davriu; B. Lauzanne; P. Mallet; P. Pramayon	[View] [Download]
Abstract: In this article, Flexible Alternative Current Transmission System devices (FACTS) are considered among different possibilities allowing a better optimisation of the network development, in a context where respect for the environment becomes one of the most important considerations for any industrial expansion. Facing the difficulty of fmding new right of ways, EDF is searching for alternate means to increase the functionality of the existing network, with a particular concern for power transfert capability. Following a brief presentation of the French Power System, the different concepts used at EDF to judge of the advantages of using FACTS within the network are presented. The representation and description of several FACTS devices in the existing planning tools are presented and the methodologies used to evaluate the economical interest as well as the technical consequences of their implementation are described. Finally, preliminary results are presented, providing a better understanding ofF ACTS benefits for the EDF System.

	CONTROL SYSTEM OF THE STATIC SYSTEM-TIE FREQUENCY CONVERTER MULDENSTEIN INCLUDING OPERATION RESULTS By H. Weiss	[View] [Download]
Abstract: The static system-tie frequency converter - a voltage source DC-link converter - located at Muldenstein / Germany is designed for feeding the railway network. This converter incorporates GTO thyristors on both the 3-phase 50 Hz and the 1-phase 16 2/3 Hz side. Therefore, active power transfer is possible in both directions and additionally, reactive power is adjustable within converter current limits at both the 50 Hz and the 16 2/3 Hz side. In order to minimize GTO switching losses fundamental wave switching is used at the individual GTO inverters. The closed loop control structure of the converter is optimized for this fundamental wave operation principle at both continuous and transient operation. Fourier filters for signal acquisition, fundamental wave vector control and fundamental wave control sets are used for standard (continuous) operation. In case of GTO inverter peak current interactions with pulse blocking (e. g. caused by a line short circuit) transient control measures take command. The converter is capable of feeding the central railway network in a frequency-elastic mode and the decentral railway line in a frequency-locked mode.