EPE Association: EPE 1995 - 18 - Lecture Session L5b: SYSTEM ENGINEERING

EPE 1995 - 18 - Lecture Session L5b: SYSTEM ENGINEERING
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 1995 - Conference > EPE 1995 - 18 - Lecture Session L5b: SYSTEM ENGINEERING

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   ANALYSIS AND CONTROL OF A THREE-PHASE VOLTAGE-DOUBLER CURRENT-CONTROLLED REVERSIBLE AC TO DC CONVERTER
By M. C. Jiang; C. T. Pan [View]
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Abstract: In this paper a three-phase current-controlled AC to DC converter is adopted by using only four active .switches to simplify the hardware circuit and achieve unity power factor, sinusoïdal input current and bidirectional . power flow capability. A small-signal model is derived and, in addition to the feedback control, a three-phase instantaneous voltage detector is also proposed for. the added adaptive feed-forward control to achieve almost zero output impedance and zero audio susceptibility. Finally, a prototype hardware circuit is constructed and some experimental results are presented for demonstration.

   ELECTRIC SHIP PROPULSION
By A. J. Blokland; B. van der Ploeg [View]
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Abstract: The Netherlands government decided to build an "Amphibious Transport Ship" (ATS). To cope with the operational functions of the ATS an integrated electric AC propulsion drive (approx. 2 x 6,2 MW) and electrical distribution system came out as the most cost effective solution. This paper presents a filosophy of electrical energy management and design consequences of static convertor application.

   POWER CONDITIONING OF SINGLE-PHASE AC-DC CONVERTERS IN PARALLEL
By T. Ohnuki; O. Miyashita; Ph. Lataire; H. Tomita [View]
[Download]

Abstract: A new method for power conditioning of single-phase ac-de converters in parallel is proposed. At least one PWM converter is used in the group. The PWM converter acts not only as a rectifier but also as an active power filter for the other rectifiers in the group. Consequently, the mains current flows sinusoidally and the total power factor approaches unity. The PWM converter is controlled by a predictive instantaneous-current pulsewidth modulation. In this modulation, a pulsewidth applied to the switching devices is calculated at the beginning of every switching period. To improve further the PWM converter performance for abrupt load changes, this paper introduces a control method with linear extrapolation of the resultant current of the rectifiers. The proposed method was verified by experiments and computer simulation. This paper presents the control method, discusses steady:-state and transient performances of the PWM converter, and describes parallel operation of the PWM converter and rectifiers.

   Innovative Simulation Methods in Power Electronics and Drive Technology on Personal Computers
By Uwe Knorr; Lutz Zacharias [View]
[Download]

Abstract: An effective simulation of complex systems like power electronics or electrical drive systems even on a normal PC is no more an utopia. Modern ways and solutions are presented in this paper.

EPE 1995 - 18 - Lecture Session L5b: SYSTEM ENGINEERING
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 1995 - Conference > EPE 1995 - 18 - Lecture Session L5b: SYSTEM ENGINEERING
	[return to parent folder]

	ANALYSIS AND CONTROL OF A THREE-PHASE VOLTAGE-DOUBLER CURRENT-CONTROLLED REVERSIBLE AC TO DC CONVERTER By M. C. Jiang; C. T. Pan	[View] [Download]
Abstract: In this paper a three-phase current-controlled AC to DC converter is adopted by using only four active .switches to simplify the hardware circuit and achieve unity power factor, sinusoïdal input current and bidirectional . power flow capability. A small-signal model is derived and, in addition to the feedback control, a three-phase instantaneous voltage detector is also proposed for. the added adaptive feed-forward control to achieve almost zero output impedance and zero audio susceptibility. Finally, a prototype hardware circuit is constructed and some experimental results are presented for demonstration.

	ELECTRIC SHIP PROPULSION By A. J. Blokland; B. van der Ploeg	[View] [Download]
Abstract: The Netherlands government decided to build an "Amphibious Transport Ship" (ATS). To cope with the operational functions of the ATS an integrated electric AC propulsion drive (approx. 2 x 6,2 MW) and electrical distribution system came out as the most cost effective solution. This paper presents a filosophy of electrical energy management and design consequences of static convertor application.

	POWER CONDITIONING OF SINGLE-PHASE AC-DC CONVERTERS IN PARALLEL By T. Ohnuki; O. Miyashita; Ph. Lataire; H. Tomita	[View] [Download]
Abstract: A new method for power conditioning of single-phase ac-de converters in parallel is proposed. At least one PWM converter is used in the group. The PWM converter acts not only as a rectifier but also as an active power filter for the other rectifiers in the group. Consequently, the mains current flows sinusoidally and the total power factor approaches unity. The PWM converter is controlled by a predictive instantaneous-current pulsewidth modulation. In this modulation, a pulsewidth applied to the switching devices is calculated at the beginning of every switching period. To improve further the PWM converter performance for abrupt load changes, this paper introduces a control method with linear extrapolation of the resultant current of the rectifiers. The proposed method was verified by experiments and computer simulation. This paper presents the control method, discusses steady:-state and transient performances of the PWM converter, and describes parallel operation of the PWM converter and rectifiers.

	Innovative Simulation Methods in Power Electronics and Drive Technology on Personal Computers By Uwe Knorr; Lutz Zacharias	[View] [Download]
Abstract: An effective simulation of complex systems like power electronics or electrical drive systems even on a normal PC is no more an utopia. Modern ways and solutions are presented in this paper.