IGCT-a new emerging technology for high power, low cost inverters

Mehta

International Journal on Advanced Science, Engineering and Information Technology

2017

Section: A Technical Comparison Between the Vsc And Csc Topologiesmentioning

confidence: 99%

Modelling and Simulation of Current Source Converter based Dynamic Voltage Restorer for Voltage Regulation cum Harmonics Mitigation

Mehta

International Journal on Advanced Science, Engineering and Information Technology

2017

“…Furthermore, all the switching problems faced in the early stages of CSC development can be overcome by employing trilevel switching scheme which has become a standard technique in the control of CSC [6]. (iii) Integrated Gate Commutated Thyristor (IGCT) having high ratings, high reverse voltage blocking capability, low snubber requirements, lower gate-drive power requirements than GTO, and also has higher switching speed than GTO, is the optimum combination of the characteristics demanded in high-power applications [7]. Using the state-of-the-art technology of the semiconductor switches, there will be no need for the series diode in the CSC topology anymore.…”

Section: Introductionmentioning

confidence: 99%

Current source converter based D-STATCOM for voltage sag mitigation

Mehta

Int. J. Simul. Multisci. Des. Optim.

2015

-This paper presents a novel method of realizing one of the custom power controllers, the distribution static synchronous compensator (D-STATCOM) using current source converter (CSC) topology. Almost all the custom power controllers such as dynamic voltage restorer (DVR), unified power quality conditioner (UPQC) including D-STATCOM are generally designed and implemented by using voltage source converters (VSC) and not much research publications with CSC based approach has been reported over the last one decade. Since the D-STATCOM is a current injection device, its performance can be improved when realized by a current-source converter which can generate a controllable current directly at its output terminals and offers many advantageous features. In this paper, an attempt has been made to study the performance of a CSC based D-STATCOM suitable for use in the power distribution system in order to mitigate voltage sag and improve power quality. The proposed model uses a three leg CSC whose switching strategy is based on sinusoidal pulse width modulation (SPWM). The model has been simulated in the Matlab/Simulink environment. The results of the simulation runs under steady state and dynamic load perturbation provide excellent voltage and current waveforms that support the justification of the proposed model.

2008 IEEE Industry Applications Society Annual Meeting

“…IGCT(Integrated Gate Commutated Thyristor) has been introduced as a much advanced GTO to the industry of high power and medium voltage application in late 90s [6]. Since then, the performance and electrical rating of IGCT has increased dramatically and today 4.5-, 5.5-, 6-, 6.5-, 10-kV IGCTs are available [7], [8].…”

mentioning

confidence: 99%

Application of IGCT in High Power Rectifiers

Suh

Steimer

2008

This paper investigates the possibility of applying IGCT(Integrated Gate Commutated Thyristor) into high current high power rectifier systems. The optimal power converter topology that fully utilizes the functionality of IGCT is proposed. The proposed power converter consists of a front-end diode rectifier and 3-level step-down dc/dc converter. As compared to 2-level operation, half the input dc voltage and twice the effective switching frequency of 3-level operation can provide a wider operation range of continuous conduction mode resulting in a higher average output current of less ripple size than 2-level case. A laboratory proto-type of 5kA, 3.1MW rectifier has been simulated and tested to confirm the feasibility of IGCT in the proposed power converter topology. The proposed solution generates a relatively smooth output dc current with less contents of high frequency harmonics, thereby avoiding the high frequency harmonic related problems found in IGBT based high current rectifiers. IGCT would play a significant role to improve the cost-effective performance and reliability in low and medium ranged high current high power rectifier systems.