By Jos Arrillaga, Yonghe H. Liu, Neville R. Watson, Nicholas J. Murray
For terribly excessive voltage or very excessive present purposes, the facility nonetheless will depend on thyristor-based Line Commutated Conversion (LCC), which limits the ability controllability to 2 quadrant operation. in spite of the fact that, the scores of self-commutating switches akin to the Insulated-Gate Bipolar Transistor (IGBT) and built-in Gate-Commutated Thyristor (IGCT), are achieving degrees that make the know-how attainable for terribly excessive energy applications.
This special booklet reports the current country and destiny clients of self-commutating static strength converters for functions requiring both extremely excessive voltages (over six hundred kV) or extremely excessive currents (in countless numbers of kA). it truly is a big reference for electric engineers operating within the parts of energy iteration, transmission and distribution, utilities, production and consulting organizations.
All themes during this region are held during this one entire quantity. inside of those pages, look forward to finding thorough insurance on:
- modelling and regulate of converter dynamics;
- multi-level Voltage resource Conversion (VSC) and present resource Conversion (CSC);
- ultra high-voltage VSC and CSC DC transmission;
- low voltage excessive DC present AC-DC conversion;
- industrial excessive present purposes;
- power conversion for prime strength garage.
this article has a bunch of worthy fabric that still makes it an invaluable resource of data for ultimate yr engineering scholars focusing on strength engineering, and people interested by postgraduate research.
Chapter 1 creation (pages 1–14):
Chapter 2 rules of Self?Commutating Conversion (pages 15–45):
Chapter three Multilevel Voltage resource Conversion (pages 47–71):
Chapter four Multilevel Reinjection (pages 73–97):
Chapter five Modelling and keep an eye on of Converter Dynamics (pages 99–152):
Chapter 6 PWM–HVDC Transmission (pages 153–169):
Chapter 7 extremely High?Voltage VSC Transmission (pages 171–196):
Chapter eight extremely High?Voltage Self?Commutating CSC Transmission (pages 197–220):
Chapter nine Back?to?Back Asynchronous Interconnection (pages 221–233):
Chapter 10 Low Voltage excessive DC present AC–DC Conversion (pages 235–291):
Chapter eleven energy Conversion for top strength garage (pages 293–307):
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Extra resources for Self-Commutating Converters For High Power Applications
The modulation process develops independent fundamental and harmonic frequency voltage control from a constant DC source; this in turn provides four-quadrant power controllability and avoids the use of low-order harmonic filters. 44 SELF-COMMUTATING CONVERTERS FOR HIGH POWER APPLICATIONS With the addition of PWM, VSC is becoming a competitive technology for highvoltage applications, such as HVDC transmission for power ratings of several hundred MW. In HVDC CSC schemes, a change in the power direction requires DC voltage reversal, a condition that makes the control of multiterminal interconnections difficult.
With the reversal angles shown (a1 ; a2 ; a3 ; . . ap ) the following rms value of the nth voltage results: " ð # ð a2 ð a3 ð 90 a1 1 4 Vd À sinðnaÞda þ sinðnaÞdaÀ sinðnaÞda . . þ sinðnaÞda Vn ¼ pﬃﬃﬃ 2p 2 ap 0 a1 a2 pﬃﬃﬃ n o 2 Vd ½cosðnaÞa0 1 À½cosðnaÞaa21 þ ½cosðnaÞaa32 . . À½cosðna90 ¼ ap pn pﬃﬃﬃ 2 Vd f2½cosðna1 ÞÀcosðna2 Þ þ cosðna3 þ . 9 Voltage reversals. e. 11th, 13th, 17th, etc. 11. 10. At any fundamental frequency, elimination of the lower-order harmonics from the phase waveforms will cause the portion of the rms which was provided by the eliminated harmonics to be spread over the remaining harmonic magnitudes.
T7 0). e. t0 , ti and ti þ 1 ) are determined, the switching vectors are arranged as follows: S i j~ S i þ 1 j~ S i þ 1 j~ S i j~ S 0jj jj ~ S 0 j~ t0 ! 2 ti ! 2 ti þ 1 ! 2 ti þ 1 ! 2 ti ! 2 t0 ! 2 The SVPWM pattern 2 has less switching actions in a fundamental cycle, as compared with the triangle carrier-based SPWM, if the SVPWM switching cycle time is equal to the SVPWM carrier cycle time. 16(a), (b) and (c) indicate that there are significant differences between the two switching strategies SVPWM and SPWM (in dashed lines).
Self-Commutating Converters For High Power Applications by Jos Arrillaga, Yonghe H. Liu, Neville R. Watson, Nicholas J. Murray