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TitleMultiple-switch pulsed power generation based on a transmission line transformer
File Size7.3 MB
Total Pages155
Table of Contents
                            Table of contents
1. Introduction
2. Transmission line transformer based multiple-switch technology
3. Multiple-switch Blumlein generator
4. Four-switch pilot setup
5. Ten-switch prototype system
6. Exploration of using semiconductor switches and other circuit topologies
7. Conclusions
Appendix A.
Appendix B.
Appendix C.
Appendix D.
Curriculum Vitae
Document Text Contents
Page 1

Multiple-switch pulsed power generation

based on a transmission line transformer


ter verkrijging van de graad van doctor aan de

Technische Universiteit Eindhoven op gezag van

de Rector Magnificus, C.J. van Duijn,

voor een commissie aangewezen door het College

voor Promoties in het openbaar te verdedigen op

dinsdag 22 januari 2008 om 16.00 uur


Zhen Liu

geboren te Xiang Cheng, China

Page 2

Dit proefschrift is goedgekeurd door de promotoren: J.H. Blom


prof.dr. M.J. van der Wiel

Copromotor: A.J.M. Pemen

This work is carried out with the financial support from the Dutch IOP-EMVT program

(Innovatiegerichte Onderzoeksprogramma’s – Electromagnetische Vermogens Techniek).


Liu, Zhen

Multiple-switch pulsed power generation based on a transmission line transformer / by

Zhen Liu. – Eindhoven : Technische Universiteit Eindhoven, 2008.

Proefschrift. – ISBN 978-90-386-1764-0

NUR 959

Trefw.: hoogspanningstechniek / hoogspanningspulsen / elektrische doorslag /

transformatorschakelingen / transmissielijnen.

Subject headings: high-voltage techniques / pulsed power supplies / spark gaps / pulse

transformers / transmission lines.

Page 77

Four-switch pilot setup 67

Fig. 4.16 Typical voltage and current of the discharging into tap water without air bubbles

Fig. 4.17 Typical power and energy injected into the reactor filled with tap water (P1 and

E1 are the power and energy in the case of no air bubbling; P2 and E2 are the power and

energy in the case of air bubbling)

Page 78

68 Chapter 4

4.4.3 The dye degradation

A volume of 1.4 liters of dye (Methylene blue) solution at an initial concentration of

10 mg/l was tested with air bubbling at a flow rate of 20 l/min. The pulsed discharge was

generated at a repetition rate of 15 pps (pulses per second). The resistance of the reactor

and the dye concentration were measured every 30 minutes. Figure 4.18 shows the

dependence of the reactor resistance and dye concentration on the treatment time. With

increasing treatment time, the resistance of the reactor decreased: it dropped particularly

dramatically within the first 30 minutes, from 2.89 kΩ to 458 Ω, and it reached a minimal

value of 130 Ω after 150 minutes. This is close to the resistance of the tap water reactor.

This indicates that the conductivity of the dye solution increases with treatment time. This

is caused by the erosion of the pin electrode and dye decomposition. It was observed that

the discharge in the dye solution is initially similar to the discharge in deionized water,

while it looked more and more like discharging in tap water with increasing treatment

time. From Figure 4.18 one also can see that the dye concentration of the dye solution

dropped from 10 mg/l to 6.22 mg/l; this occurred most rapidly during the period from 0 to

30 minutes during which it dropped by 2 mg/l. A detailed chemical analysis during the

dye degradation was reported elsewhere [Gra(2006)].

Fig. 4.18 Dependence of the solution resistance and the dye concentration

on treatment time

Page 155

Curriculum Vitae

Zhen Liu was born on June 06, 1978, in Xiang Cheng, China. In 2000, he completed his
bachelor study at the Department of Electronic Science from Xi’an Jiaotong Univeristy,

China. In 2003, he received his master degree at the Electrical Department from Tsinghua

University, China. His master thesis was awarded as one of the best master theses by

Tsinghua University in 2004. Since November 2003, he started his Ph.D project in the

EPS (Electrical Power Systems) group, TU/e (Technische Universiteit Eindhoven), the

Netherlands. The subject is to develop an efficient large pulsed power supply using a

transmission line transformer based multiple-switch technology.

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