Implementing Symmetrical Structure in MOV-RCD Snubber-Based DC Solid-State Circuit Breakers

Zhao, Shuyan; Kheirollahi, Reza; Wang, Yao; Zhang, Hua; Lu, Fei

doi:10.1109/tpel.2021.3133113

Cited by 36 publications

(11 citation statements)

References 33 publications

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“…A 3mF capacitor bank is adopted as the dc voltage source, and the line inductor L line is selected as 36.8 μH based on reported Ref. [4]. The design parameters of the prototype are summarized in Table 1 for a clear demonstration.…”

Section: Implementation Of 500v/20a Mov-based Sscb Prototypementioning

confidence: 99%

“…The snubber parameters of this prototype follow the reported MOV-RCD design guideline in Ref. [4]. The setup parameters of implemented prototype #2 are summarized in Table 2 for a clear demonstration.…”

Section: B Implementation Of 500v/20a Mov-rcd Passive Clamping Based ...mentioning

confidence: 99%

“…Recently, dc systems are a promising solution for electrified aircraft and ship propulsion systems [1]- [3]. A typical problem of dc systems is its lack of zero-current-crossing point, which imposes challenges on dc circuit breakers during fault isolation [4]. Due to the development of wide bandgap semiconductors, SSCB is an emerging solution that provides capabilities of high blocking voltage, large current interruption, and microseconds response time [5], [6].…”

Section: Introductionmentioning

confidence: 99%

“…MOV is an effective passive voltage clamping component commonly used to protect switches from voltage overshoot. MOV-RCD voltage clamping is also widely used in SSCBs as it presents a simple structure, enhanced feasibility and scalability, dv/dt mitigation, discharging current reduction, and reduced power shock [4], [16]- [18].…”

Section: Introductionmentioning

confidence: 99%

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Investigation of Limitations in Passive Voltage Clamping-Based Solid-State DC Circuit Breakers

Zhao

Kheirollahi

Wang

et al. 2022

IEEE Open J. Power Electron.

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This paper investigates limitations of passive voltage clamping based dc solid-state circuit breakers (SSCBs). There are two major contributions of this paper. First, it presents a unique quantifying study of limitations in metal oxide varistor (MOV) clamping based SSCBs in terms of gate voltage distortions and power shock. Second, it provides a comprehensive quantifying investigation of limitations in MOV and resistor-capacitor-diode (MOV-RCD) clamping based SSCBs regarding the power shock and response speed. For MOV based SSCBs, both gate voltage distortions and power shock during turn-off are extremely high, causing switch degradation/failure. For MOV-RCD clamping based SSCBs, a snubber capacitor is added to reduce dv/dt and power shock. However, this capacitor brings two main limitations: a) inevitable high transient power/energy shock at high-current interruption and b) low turn-off speed caused by high-inertia capacitor charging at low-current interruption. Two prototypes are implemented to illustrate limitations: a discrete SiC MOSFET-based 500 V/20 A SSCB, and a SiC MOSFET module-based 800V/100A SSCB. Experiments validate that the transient power shock can reach 256 kW at a 1.2 kA fault current interruption, which affects system reliability. Moreover, the response speed at a 100 A case (7.8 μs) can be 14 times slower than the 1 kA case (0.56 μs) due to the snubber capacitor charging process, which leads to inconsistent control and coordination of SSCBs.

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Section: Implementation Of 500v/20a Mov-based Sscb Prototypementioning

confidence: 99%

Section: B Implementation Of 500v/20a Mov-rcd Passive Clamping Based ...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Investigation of Limitations in Passive Voltage Clamping-Based Solid-State DC Circuit Breakers

Zhao

Kheirollahi

Wang

et al. 2022

IEEE Open J. Power Electron.

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“…active resonant circuit is added to create the required current zero crossing, MCB can be effectively adopted for the dc applications [5]. The solid-state circuit breaker (SSCB) based on semiconductor devices could interrupt the fault current quickly without any arc issue, but it suffers from the high conduction loss during the normal operation [6], [7]. On the contrary, the hybrid circuit breaker (HCB) combines the low loss advantages of mechanical switches with the fast response times offered by power electronic interrupter (PEI) [8], [9].…”

Section: Introductionmentioning

confidence: 99%

12-kV 1-kA Breaking Capable Modular Power Electronic Interrupter With Staged Turn-off Strategy for Medium-Voltage DC Hybrid Circuit Breaker

Liu

Ravi

Buttay

et al. 2022

IEEE Trans. on Ind. Applicat.

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The dc circuit breaker (DCCB) plays an important protection role in the dc distribution systems. Hybrid dc circuit breaker (HCB) offers low conduction losses and reasonably fast response times. In this paper, a high power density, modular and scalable power electronic interrupter (PEI) design is introduced for medium voltage (MV) HCB platforms. Following this concept, the single low-voltage (LV) module is first investigated in terms of the high pulse current ratio and the voltage clamping circuit. After the comparison and test among different devices, a compact module with 1.7 kV discrete IGBTs are selected as main switches. While the voltage clamping circuit is carefully designed to guarantee no tail current bump and sufficient turn-off voltage margin. Next the whole system with series modules is optimized on the aspects of the turn-off strategy, power supply structure and layout of modules. An improved staged turn-off scheme is proposed, which can not only reduce the peak current and total metal oxide varistor (MOV) energy, but also help balance the MOV energy distribution. A 12 kV and 1 kV breaking capable PEI was demonstrated based on the proposed PEI design, achieving a peak power density of 7.4 kW/cm3, much higher than the IGBT module-based solution. The breaking capability and effectiveness of the modular PEI is demonstrated in a 6 kV MVDC HCB device.

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Soft Turn-Off Capacitively Coupled SSCBs for MVDC Applications

Kheirollahi

2023

Power Systems

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Implementing Symmetrical Structure in MOV-RCD Snubber-Based DC Solid-State Circuit Breakers

Cited by 36 publications

References 33 publications

Investigation of Limitations in Passive Voltage Clamping-Based Solid-State DC Circuit Breakers

Investigation of Limitations in Passive Voltage Clamping-Based Solid-State DC Circuit Breakers

12-kV 1-kA Breaking Capable Modular Power Electronic Interrupter With Staged Turn-off Strategy for Medium-Voltage DC Hybrid Circuit Breaker

Soft Turn-Off Capacitively Coupled SSCBs for MVDC Applications

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