Snubber and Metal Oxide Varistor Optimization Design of Modular IGCT Switch for Overvoltage Suppression in Hybrid DC Circuit Breaker

Yi, Qiang; Yang, Fei; Wu, Yifei; Wu, Yi; Gao, Chong; Zhuang, Weibin; Rong, Mingzhe

doi:10.1109/jestpe.2020.2985627

Cited by 22 publications

(4 citation statements)

References 27 publications

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“…When the shunt capacitor bank is put into operation, the auxiliary switch is closed first, and after a period of time Δt, the main switch is closed, thus realizing the shorting of the series resistance to complete the closing action; When opening the shunt capacitor bank, the auxiliary switch is closed first and the main switch is disconnected, making the series resistor and auxiliary switch in series into the circuit, and after a time of Δt, the auxiliary switch is disconnected to complete the opening operation. In this paper, Δt is set to one cycle, which is 20 ms [13,21] .At the same time, assuming that the thermal effect of the resistance meets the requirements, it will not be discussed in this paper.…”

Section: Series Switching Resistancementioning

confidence: 99%

“…Due to the many limitations of field experiments, mechanism analysis [6] or computer simulation modeling [7][8][9][10][11][12] is usually used to study the shunt capacitor casting and switching process. Techniques to solve the problem of closing inrush current and opening overvoltage include thyristor switching capacitors and phase-controlled circuit breakers [2] .In addition, there is also literature on the suppression of inrush current and overvoltage phenomena by changing the structure of the compensation circuit and adding passive damping and voltage limiting devices, including series resistors [13] ,RC resistive protection devices [14] ,L-R overvoltage protection devices [15] , and metal-oxide surge arresters [16] , among other suppression methods. In this paper, the EMTP program is used to calculate the transient overvoltages that may occur on capacitors under various switching situations, and to analyze and compare the effects of using ordinary circuit breakers, series tap-changing resistors, and phase-controlled circuit breakers.…”

Section: Introductionmentioning

confidence: 99%

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Overvoltage management of SF6 circuit breaker switching for 66kV parallel capacitor bank based on ATP-EMTP

zhai,

fan,

meng

et al. 2024

Eighth International Conference on Energy System, Electricity, and Power (ESEP 2023)

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The purpose of this study is to investigate the overvoltage management methods during the process of shunt capacitor bank throwing at 66kV by SF6 circuit breakers and to compare different schemes. First, the background and objectives of the study, i.e., the overvoltage problems that may be caused during the shunt capacitor bank throwing, are introduced. Then, the principles of phase-controlled circuit breaker and series resistance schemes are elaborated. A capacitor throwing simulation model was constructed by ATP-EMTP, and numerical simulations were performed. The comparative analysis results show that the phase selection operation of circuit breaker throwing can meet the inrush current limiting effect when closing, but cannot limit the overvoltage after reignition of breaking, and there are problems of high technical requirements and high cost in practical application. Compared with this, series resistance program in the cost and simplicity of implementation is more advantageous. Taking into account the technical and economic aspects, it is concluded that the series resistance scheme is more desirable at this stage.

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Section: Series Switching Resistancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Overvoltage management of SF6 circuit breaker switching for 66kV parallel capacitor bank based on ATP-EMTP

zhai,

fan,

meng

et al. 2024

Eighth International Conference on Energy System, Electricity, and Power (ESEP 2023)

View full text Add to dashboard Cite

show abstract

“…The most common elements are resistors [3][4][5], with the role of delimiting the intensity of the electric current through the electric circuits; capacitors [6], with the role of storing electrical energy in direct current circuits and with the functions of storing electrical and reactive energy in alternating current circuits; and inductors [7], with the role of storing energy in a magnetic field when an electric current flows through it. Other important categories are coils, with resistive functions in direct current circuits, and resistive and reactive functions in alternating current circuits; ferrites, which can be represented as a combination of a coil, a capacitor, and an electrical resistance; potentiometers, defined as variable resistors [8]; varistors [9]; photoresistors [10]; and thermistors [11]. The later three categories are resistors whose electrical resistance is controlled, in turn, by the applied electrical voltage, the luminous flux, and the incident thermal radiation.…”

Section: Introductionmentioning

confidence: 99%

Passive Electrical Components Based on Cotton Fabric Decorated with Iron Oxides Microfibers: The Influence of Static and Pulsed Magnetic Fields on the Equivalent Electrical Properties

Bica,

Anitas,

Choi

et al. 2023

Micromachines

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In this work, environmentally friendly and low-cost passive electrical components (PECs) are manufactured based on composites consisting of cotton fabrics soaked with solutions of silicone oil and different amounts of iron oxides microfibers (μFe). The μFe consists of a mixture of three phases: hematite (α-Fe2O3), maghemite (γ-Fe2O3), and magnetite (Fe3O4). The equivalent electrical capacitance (Cp) and resistance (Rp) of PECs are measured as a function of magnetic flux density B in a static and pulsed magnetic field superimposed on an alternating electric field of frequency 1 kHz. The relative variation in the hysteresis curves for both Cp and Rp are obtained by measuring them in the ascending and then the descending mode of B. We show that all these three quantities are sensibly influenced by the volume fractions of μFe and by the values of B. The main influence on this behavior is attributed to the semiconductor properties of the α-Fe2O3 and γ-Fe2O3 components of the oxide microfibers. In addition, it is found that at B≃ 175 mT, the maximum relative variance of the hysteresis curve is about 3.35% for Cp and 3.18 % for Rp. When a pulsed magnetic field is used, it is shown that Cp and Rp closely follow the variation in the magnetic field. Thus, the resulting electrical properties of PECs, together with the fast response to the application of pulsed magnetic fields, make them useful in the fabrication of various devices, such as electric, magnetic, and deformation fields, or mechanical stress sensors with applications in protection against electromagnetic smog, healthcare monitoring, or for human–machine interfacing.

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“…For the time being, the most promising approach for direct current breaking is the hybrid switching technology, which is based on the combination of a highspeed vacuum interrupter (VI) and a semiconductor circuit. The hybrid switching technology can be divided into zero voltage switching (ZVS) technique and zero current switching (ZCS) technique according to different forms of combination [7][8][9][10]. During a ZVS process, the current is commutated from the mechanical VI to the parallel semiconductor branch, which keeps the voltage across the mechanical contacts close to zero when opening [11].…”

Section: Introductionmentioning

confidence: 99%

A novel bidirectional nonuniform hybrid circuit breaker considering different direction protection requirements

Zhuangxian

Guo

et al. 2022

IET Power Electronics

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Hybrid switching technologies such as zero voltage switching (ZVS) and zero current switching (ZCS) are widely accepted to protect DC power systems from different kinds of faults. However, in some cases such as the protection of DC generators in the electrical distribution system of modern ships, different protection strategies are needed for faults in different directions and both ZVS and ZCS technologies may be needed in one circuit breaker. This special protection requirement will lead to being more complicated in the bidirectional protection of the system and limits the application of the hybrid circuit breakers. Therefore, a novel bidirectional nonuniform hybrid circuit breaker based on a special combination of ZVS and ZCS technologies is proposed to simplify the overall topology of the circuit breaker. The proposed scheme can interrupt high rate‐of‐rise fault current in one direction by ZCS technology while interrupting short‐circuit current in another direction with short‐circuit short‐delay strategy by ZVS technology. First, the topology and working principle of the proposed bidirectional nonuniform hybrid circuit breaker are introduced. Moreover, three current commutation processes involved in both directions of fault current interrupting are analysed to achieve the optimal connection structure. Furthermore, a high‐speed driving mechanism of the vacuum interrupter (VI) based on the flexible conjunction of an electromagnetic repulsion (EMR) driver and a permanent magnetic (PM) system is introduced and the structure of the optimal connection is designed. Finally, the proposed topology of the hybrid circuit breaker is validated using a realistic 800 V/1600 A prototype. The short‐circuit breaking off tests of both directions are conducted. The feasibility of the proposed scheme is verified with these tests.

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Snubber and Metal Oxide Varistor Optimization Design of Modular IGCT Switch for Overvoltage Suppression in Hybrid DC Circuit Breaker

Cited by 22 publications

References 27 publications

Overvoltage management of SF6 circuit breaker switching for 66kV parallel capacitor bank based on ATP-EMTP

Overvoltage management of SF6 circuit breaker switching for 66kV parallel capacitor bank based on ATP-EMTP

Passive Electrical Components Based on Cotton Fabric Decorated with Iron Oxides Microfibers: The Influence of Static and Pulsed Magnetic Fields on the Equivalent Electrical Properties

A novel bidirectional nonuniform hybrid circuit breaker considering different direction protection requirements

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