EPE Association: EPE-PEMC 2000 - Topic 05c: Energy Applications

EPE-PEMC 2000 - Topic 05c: Energy Applications
You are here: EPE Documents > 04 - EPE-PEMC Conference Proceedings > EPE-PEMC 2000 - Conference > EPE-PEMC 2000 - Topic 05: Applications of Power Electronic Systems > EPE-PEMC 2000 - Topic 05c: Energy Applications

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   About Structure Effects on Parameters and Behaviour of Very High Current Controlled Transformer - Rectifiers
By Fuentes R. [View]
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Abstract: In this paper the analysis of very high current transformer-rectifier behavior that have a non symmetric secondary structure is presented. The paper is concerned with a real case observed in a 20000 DC A controlled rectifier, designed as ANSI 46 configuration. Several design criteria are recommended such that this secondary structure does not mean a problem in the transformer-rectifier operation, mainly in what interphase reactor is concerned.

   Novel Control Strategies for Line Voltage Breakdowns of a Slip Ring Induction Machine with Voltage Source DC-Link Converter
By Weiss H., Schmidhofer A., Lampersberger M. [View]
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Abstract: The slip ring induction machine (asynchronous machine, ASM) is used for variable speed drives where the operation speed is near the synchronous speed. A high power application is the rotating system tie frequency converter, which is a major power source in the variable frequency railway supply. State of the art is a voltage source DC-link converter at the rotor side of the machine. One of the criteria for the rating of the DC-link converter is the current at the rotor side. This current can be higher than the current carrying capabilities of the semiconductors during transient conditions like line voltage breakdowns. The control strategy to handle line failures e.g. big voltage dips without opening the line circuit breaker and fast regaining of undisturbed operation is described.

   Overvoltage Effects in Electrical Network and their Influence on HV Drives
By Chmelík K., Èech V., Krejèa P. [View]
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Abstract: The use of AC motors also in controlled and regulated drives is widely spread by expansion of semiconductor technology. Regulation properties of AC drives are comparable with DC drives especially by feeding of asynchronous and synchronous motors from static frequency converters. Until recently these converters were used only for low voltage. Lately the converters for higher voltage than 3kV are available. These drives are constructed not only for new equipment but also it is possible to use them with advantage by reconstruction of outdated drives. The failures started to occur during operation. The cause of the failures were always switching or failure effects at 6kV feeding network.

EPE-PEMC 2000 - Topic 05c: Energy Applications
You are here: EPE Documents > 04 - EPE-PEMC Conference Proceedings > EPE-PEMC 2000 - Conference > EPE-PEMC 2000 - Topic 05: Applications of Power Electronic Systems > EPE-PEMC 2000 - Topic 05c: Energy Applications
	[return to parent folder]

	About Structure Effects on Parameters and Behaviour of Very High Current Controlled Transformer - Rectifiers By Fuentes R.	[View] [Download]
Abstract: In this paper the analysis of very high current transformer-rectifier behavior that have a non symmetric secondary structure is presented. The paper is concerned with a real case observed in a 20000 DC A controlled rectifier, designed as ANSI 46 configuration. Several design criteria are recommended such that this secondary structure does not mean a problem in the transformer-rectifier operation, mainly in what interphase reactor is concerned.

	Novel Control Strategies for Line Voltage Breakdowns of a Slip Ring Induction Machine with Voltage Source DC-Link Converter By Weiss H., Schmidhofer A., Lampersberger M.	[View] [Download]
Abstract: The slip ring induction machine (asynchronous machine, ASM) is used for variable speed drives where the operation speed is near the synchronous speed. A high power application is the rotating system tie frequency converter, which is a major power source in the variable frequency railway supply. State of the art is a voltage source DC-link converter at the rotor side of the machine. One of the criteria for the rating of the DC-link converter is the current at the rotor side. This current can be higher than the current carrying capabilities of the semiconductors during transient conditions like line voltage breakdowns. The control strategy to handle line failures e.g. big voltage dips without opening the line circuit breaker and fast regaining of undisturbed operation is described.

	Overvoltage Effects in Electrical Network and their Influence on HV Drives By Chmelík K., Èech V., Krejèa P.	[View] [Download]
Abstract: The use of AC motors also in controlled and regulated drives is widely spread by expansion of semiconductor technology. Regulation properties of AC drives are comparable with DC drives especially by feeding of asynchronous and synchronous motors from static frequency converters. Until recently these converters were used only for low voltage. Lately the converters for higher voltage than 3kV are available. These drives are constructed not only for new equipment but also it is possible to use them with advantage by reconstruction of outdated drives. The failures started to occur during operation. The cause of the failures were always switching or failure effects at 6kV feeding network.