EPE Association: EPE-PEMC 2006 - Topic 17: INDUSTRY ORIENTED SPECIAL SESSION

EPE-PEMC 2006 - Topic 17: INDUSTRY ORIENTED SPECIAL SESSION
You are here: EPE Documents > 04 - EPE-PEMC Conference Proceedings > EPE-PEMC 2006 - Conference > EPE-PEMC 2006 - Topic 17: INDUSTRY ORIENTED SPECIAL SESSION

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   Dynamic Damping and Power Electronics: To New Hybrid Filtering Concept
By Guillaume de-Preville [View]
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Abstract: Due to non-linear loads or non-linear behaviour of some elements, harmonics currents are injected in the network generating a voltage distortion. To improve the voltage quality, some passive filtering are used to trap these harmonic currents. However a simple passive filter modifies significantly the characteristics of the network by generating a parallel resonance and can create some problems of oscillations and instability when associated with power electronics converters as Large Rectifiers or Static Var Compensator. To avoid these problems, passive damping with parallel resistors is generally introduced. However this technique generates some losses in the whole filter and alters the efficiency of the filtering. This paper shows that dynamic damping with Voltage Source Converter can contribute to improve the damping without altering the filter efficiency and to optimise the whole losses of the hybrid filter. Two industrial cases are presented: Dynamic damping in the case of power supply and dynamic damping in the case of shunt compensation. Extension of this principle in a hybrid filter is presented in this paper with regards on losses and sizing. This article shows the strategic interest of small converters in AC filtering to make it evolute in new techniques associating passive and active elements to form hybrid dynamic damped filter.

   Future T&D Technology
By Colin Oates, Roger Bassett [View]
[Download]

Abstract: Power Electronics has evolved over the past 20 years to be the main method of power conversion in terms of equipment volume, efficiency and cost. In power transmission and distribution systems power electronics does not compare in efficiency and cost and only provides support where conventional technology is not incapable of performing the task. With the promise of Silicon Carbide (SiC) based IGBTs rated at 10kV to be realised within the next year the paper examines what effect this might have on the role of Power Electronics within Power Transmission. In particular values of efficiency, weight and size are developed for 300MW PWM based HVDC converter equipment operating with both a 50Hz transformer and at 1kHz and 20kHz and concludes that with Silicon Carbide devices the cost of VSC-HVDC stations will reduce by about 30%. Changing to high frequency conversion using frequencies of up to 20kHz will result in comparable efficiencies and volumes with Si based VSC-HVDC stations, however the overall cost will increase by about 30%.

   The Next Generation of Power Electronics in Transmission and Distribution Applications
By Roger Bassett, Will Crookes, Adrian Lancaster, Georges Tchouangue, Nobuaki Yamano [View]
[Download]

Abstract: This paper describes AREVA T&D effort to develop a economically attractive VSC solution based on the IEGT. Its wide Safe Operating Area (SOA), leads to the elimination of anode reactance and a significant reduction in the size of snubbing components. These features combined with the simplified gate voltage control, self limiting current capability and reduction in the size of protection circuitry is expected to enable the size of installations to be drastically reduced.

EPE-PEMC 2006 - Topic 17: INDUSTRY ORIENTED SPECIAL SESSION
You are here: EPE Documents > 04 - EPE-PEMC Conference Proceedings > EPE-PEMC 2006 - Conference > EPE-PEMC 2006 - Topic 17: INDUSTRY ORIENTED SPECIAL SESSION
	[return to parent folder]

	Dynamic Damping and Power Electronics: To New Hybrid Filtering Concept By Guillaume de-Preville	[View] [Download]
Abstract: Due to non-linear loads or non-linear behaviour of some elements, harmonics currents are injected in the network generating a voltage distortion. To improve the voltage quality, some passive filtering are used to trap these harmonic currents. However a simple passive filter modifies significantly the characteristics of the network by generating a parallel resonance and can create some problems of oscillations and instability when associated with power electronics converters as Large Rectifiers or Static Var Compensator. To avoid these problems, passive damping with parallel resistors is generally introduced. However this technique generates some losses in the whole filter and alters the efficiency of the filtering. This paper shows that dynamic damping with Voltage Source Converter can contribute to improve the damping without altering the filter efficiency and to optimise the whole losses of the hybrid filter. Two industrial cases are presented: Dynamic damping in the case of power supply and dynamic damping in the case of shunt compensation. Extension of this principle in a hybrid filter is presented in this paper with regards on losses and sizing. This article shows the strategic interest of small converters in AC filtering to make it evolute in new techniques associating passive and active elements to form hybrid dynamic damped filter.

	Future T&D Technology By Colin Oates, Roger Bassett	[View] [Download]
Abstract: Power Electronics has evolved over the past 20 years to be the main method of power conversion in terms of equipment volume, efficiency and cost. In power transmission and distribution systems power electronics does not compare in efficiency and cost and only provides support where conventional technology is not incapable of performing the task. With the promise of Silicon Carbide (SiC) based IGBTs rated at 10kV to be realised within the next year the paper examines what effect this might have on the role of Power Electronics within Power Transmission. In particular values of efficiency, weight and size are developed for 300MW PWM based HVDC converter equipment operating with both a 50Hz transformer and at 1kHz and 20kHz and concludes that with Silicon Carbide devices the cost of VSC-HVDC stations will reduce by about 30%. Changing to high frequency conversion using frequencies of up to 20kHz will result in comparable efficiencies and volumes with Si based VSC-HVDC stations, however the overall cost will increase by about 30%.

	The Next Generation of Power Electronics in Transmission and Distribution Applications By Roger Bassett, Will Crookes, Adrian Lancaster, Georges Tchouangue, Nobuaki Yamano	[View] [Download]
Abstract: This paper describes AREVA T&D effort to develop a economically attractive VSC solution based on the IEGT. Its wide Safe Operating Area (SOA), leads to the elimination of anode reactance and a significant reduction in the size of snubbing components. These features combined with the simplified gate voltage control, self limiting current capability and reduction in the size of protection circuitry is expected to enable the size of installations to be drastically reduced.