EPE Association: EPE 1987 - 30 - Lecture Session 5.3: REACTIVE POWER CONTROL

EPE 1987 - 30 - Lecture Session 5.3: REACTIVE POWER CONTROL
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 1987 - Conference > EPE 1987 - 30 - Lecture Session 5.3: REACTIVE POWER CONTROL

   [return to parent folder]

   FEATURES OF POWER ELECTRONIC AND CONTROL EQUIPMENT FOR THYRISTOR CONTROLLED STATIC REACTIVE COMPENSATORS FOR CERN - LEP
By J. Pedersen; A. M. Crawshaw; J. L. Haddock; H. L. Thanawala; M. L. Woodhouse; D. J. Young [View]
[Download]

Abstract: The paper describes two TCR compensators to be installed for the LEP Storage Ring Project at CERN, Geneva. The design, test and constructional features of the 3-phase, 50 Mvar, 18 kV power electronic and control equipment used in the TCRs are described.

   MICROCOMPUTER CONTROLLED CYCLOCONVERTER WITH REDUCED REACTIVE POWER
By P. Schwarz [View]
[Download]

Abstract: A cycloconverter drive is presented that consists of three line-commutated six-pulse bridge-converters feeding a three-phase synchronous motor. The open-loop firing control of the converters as well as the closed-loop current control are executed by means of a multi-microcomputer system. As the starpoints of the cycloconverter and of the motor are not connected, a zero voltage component may be added to the output voltages of the cycloconverter. It may be utilized to reduce the fundamental wave reactive power demand of the drive. A new reactive power saving control strategy is introduced and theoretically analysed in comparison with some already known concepts. Finally three selected control strategies are implemented in a laboratory drive and metrologically researched. The results are compared with those of the theoretical analysis.

   FLICKER REDUCTION PERFORMANCE OF STATIC VAR COMPENSATORS WITH ARC FURNACES
By Th.-N. Le [View]
[Download]

Abstract: This paper describes a method suitable for estimation and definition of flicker reduction performance of static Var compensators with arc furnace plants. For this purpose a transistor inverter impressing rapidly varying currents into a 380 V-model-line is used as a realistic arc furnace model. Results obtained from arc furnace plants with and without compensation are discussed.

   COMPENSATOR FOR HARMONICS AND REACTIVE POWER USING STATIC INDUCTION THYRISTORS
By M. Kohata; T. Shiota; S. Atoh; A. Nabae [View]
[Download]

Abstract: This paper describes prototype compensators suppressing the load reactive power and harmonics flowing in a power system. The compensator exhibited excellent performance of compensation behind which is a suppression concept based on the instantaneous spatial vector theory and the use of SI thyristors of high switching characteristics as the switching devices for the converters. The results of functional testing on a 20 kVA prototype compensator consisting of six SI thyristors and the evaluation of its compensation performances are presented in the paper, together with a brief description of a second prototype 100 kVA compensator developed based on the data from the test of the 20 kVA version and simulation.

EPE 1987 - 30 - Lecture Session 5.3: REACTIVE POWER CONTROL
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 1987 - Conference > EPE 1987 - 30 - Lecture Session 5.3: REACTIVE POWER CONTROL
	[return to parent folder]

	FEATURES OF POWER ELECTRONIC AND CONTROL EQUIPMENT FOR THYRISTOR CONTROLLED STATIC REACTIVE COMPENSATORS FOR CERN - LEP By J. Pedersen; A. M. Crawshaw; J. L. Haddock; H. L. Thanawala; M. L. Woodhouse; D. J. Young	[View] [Download]
Abstract: The paper describes two TCR compensators to be installed for the LEP Storage Ring Project at CERN, Geneva. The design, test and constructional features of the 3-phase, 50 Mvar, 18 kV power electronic and control equipment used in the TCRs are described.

	MICROCOMPUTER CONTROLLED CYCLOCONVERTER WITH REDUCED REACTIVE POWER By P. Schwarz	[View] [Download]
Abstract: A cycloconverter drive is presented that consists of three line-commutated six-pulse bridge-converters feeding a three-phase synchronous motor. The open-loop firing control of the converters as well as the closed-loop current control are executed by means of a multi-microcomputer system. As the starpoints of the cycloconverter and of the motor are not connected, a zero voltage component may be added to the output voltages of the cycloconverter. It may be utilized to reduce the fundamental wave reactive power demand of the drive. A new reactive power saving control strategy is introduced and theoretically analysed in comparison with some already known concepts. Finally three selected control strategies are implemented in a laboratory drive and metrologically researched. The results are compared with those of the theoretical analysis.

	FLICKER REDUCTION PERFORMANCE OF STATIC VAR COMPENSATORS WITH ARC FURNACES By Th.-N. Le	[View] [Download]
Abstract: This paper describes a method suitable for estimation and definition of flicker reduction performance of static Var compensators with arc furnace plants. For this purpose a transistor inverter impressing rapidly varying currents into a 380 V-model-line is used as a realistic arc furnace model. Results obtained from arc furnace plants with and without compensation are discussed.

	COMPENSATOR FOR HARMONICS AND REACTIVE POWER USING STATIC INDUCTION THYRISTORS By M. Kohata; T. Shiota; S. Atoh; A. Nabae	[View] [Download]
Abstract: This paper describes prototype compensators suppressing the load reactive power and harmonics flowing in a power system. The compensator exhibited excellent performance of compensation behind which is a suppression concept based on the instantaneous spatial vector theory and the use of SI thyristors of high switching characteristics as the switching devices for the converters. The results of functional testing on a 20 kVA prototype compensator consisting of six SI thyristors and the evaluation of its compensation performances are presented in the paper, together with a brief description of a second prototype 100 kVA compensator developed based on the data from the test of the 20 kVA version and simulation.