SCR self-supplied gate driver for medium-voltage application with capacitor as storage element

Raonic, D.

doi:10.1109/28.821818

Cited by 21 publications

(2 citation statements)

References 3 publications

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“…Other interesting applications, which are under development include a hybrid DC vacuum circuit breaker for medium voltage and is reported in [11]. A self-supplied SCR for medium voltage application for a solid-state starter is proposed in [12].…”

Section: Introductionmentioning

confidence: 99%

AC “Back to Back” Switching Device in Industrial Application

et al. 2020

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In industrial applications, among several varieties of semiconductor devices available, a silicon-controlled rectifier (SCR) is often used in managing and protecting various systems with different applications. Hence, it is of the utmost importance to design a control system which can operate over a range of electrical loads without any modifications in its hardware and/or software. This paper analyzes and investigates in detail the power circuit effects on conduction delay and SCR functioning. Moreover, two different commonly used driving systems for SCR application have been introduced, discussed, and evaluated. Concerning driving systems, here, three aspects have paramount importance and are consequently taken into consideration, namely the driver system losses, the conduction delay, and in particular, some power quality indices. The conduction delay is a parameter of great importance, as being able to control and reduce it to the minimum allowed by the application can bring significant practical advantages (both in terms of application and economic terms, as better summarized in the article). Theoretical analysis has been performed, followed and verified by simulation studies and, for some cases, laboratory experimental test results are presented which provide credibility to the study.

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Section: Introductionmentioning

confidence: 99%

AC “Back to Back” Switching Device in Industrial Application

et al. 2020

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“…These transformers provide energy to all types of applications [1]. Self-supplied drivers are also presented that use the switching periods of the semiconductors to obtain energy to supply the driver; however, they are only limited to specific applications [2,3]. Light-triggered devices require no external power supply to generate the gate pulse for the semiconductor, but these are only suitable for low-power applications [1,4].…”

Section: Introductionmentioning

confidence: 99%

High-voltage isolated multioutput power supply for multilevel converters

Sepehr¹,

Saradarzadeh²,

Farhangi³

2017

Turk J Elec Eng & Comp Sci

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Abstract:Multilevel converters are one of the major choices for realizing high electric power conversion. The major feature of multilevel converter topologies is the need for a large number of switches, each of which requires a gate driver circuit and an isolated DC power supply. In this paper, a pragmatic concept of design and implementation of an isolated DC-to-DC converter for a high-voltage isolated application is introduced. More specifically, a multiple isolated output power supply based on the benefits of resonant converters is designed to prepare 36 double DC voltages for driving power semiconductor devices in a three-phase, seven-level cascaded H-bridge that acts as a static synchronous series compensator (SSSC). The power supply contains several high-frequency transformers in series, carrying a high-frequency single turn current as their primary winding excitations, and they are improved by a resonant tank circuit to reduce switching and core losses. The proposed design has a high voltage insulation level, low cost, small size, adequate hold-up time, and an easily upwards extending structure. The feasibility of the design is clarified by simulation results and implementation in a high-power D-SSSC converter.

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Application of thyristor controlled phase shifting transformer excitation impedance switching control to suppress short-circuit fault current level

Liu

Hao

Wang

et al. 2018

J. Mod. Power Syst. Clean Energy

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Short-circuit fault current suppression is a very important issue in modern large-interconnected power networks. Conventional short-circuit current limiters, such as superconducting fault current limiters, have to increase additional equipment investments. Fast power electronics controlled flexible AC transmission system (FACTS) devices have opened a new way for suppressing the fault current levels, while maintaining their normal functionalities for steady-state and transient power system operation and control. Thyristor controlled phase shifting transformer (TCPST) is a beneficial FACTS device in modern power systems, which is capable of regulating regional power flow. The mathematical model for TCPST under different operation modes is firstly investigated in this study. Intuitively, the phase shifting angle control can adjust the equivalent impedance of TCPST, but the effect has been demonstrated to be weak. Therefore, a novel transformer excitation impedance switching (EIS) control method, is proposed for fault current suppressing, according to the impedance characteristics of TCPST. Simulation results on IEEE 14-bus system have shown considerable current limiting characteristic of the EIS control under various fault types. Also, analysis of the timing requirement during fault interruption, overvoltage phenomenon, and ancillary mechanical support issues during EIS control is discussed, so as to implement the proposed EIS control properly for fast fault current suppression.

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SCR self-supplied gate driver for medium-voltage application with capacitor as storage element

Cited by 21 publications

References 3 publications

AC “Back to Back” Switching Device in Industrial Application

AC “Back to Back” Switching Device in Industrial Application

High-voltage isolated multioutput power supply for multilevel converters

Application of thyristor controlled phase shifting transformer excitation impedance switching control to suppress short-circuit fault current level

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