Overvoltage Estimation by Stray Inductances During Turn-off of a 500 kV/25 kA DC Circuit Breaker

Dongye, Zhonghao; Qi, Lei; Liu, Kexin; Wei, Xiaoguang; Lu, Fei; Cui, Xiang

doi:10.1109/tpel.2020.3046007

Cited by 21 publications

(4 citation statements)

References 13 publications

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“…When the SSCB is closing after PSE, the phases on both sides of the system are different. Due to the ground capacitance of the line, the discharge of the capacitor at the moment of closing will generate an impulse current [22]. The equivalent circuit of the closing process is presented in Figure 2.…”

Section: Equal-voltage Closingmentioning

confidence: 99%

An optimal phase control method for the suppression of phase sequence exchange impulse current and voltage

Sun

et al. 2022

IET Power Electronics

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Phase sequence exchange (PSE) is an emerging emergency control method for power systems. However, PSE will generate impulse current and voltage. In this research, to suppress the impulse of PSE, a phase control method for zero-current opening and equal-voltage closing is adopted, and verified via both physics and experiments. First, an equivalent circuit is established, and the differential equations are solved to validate that this phase control method is the optimal method for the suppression of the impulse current and voltage in PSE. Then, the action sequence scheme and calculation method of the phase control method are advanced. Finally, based on the real-time digital simulation system (RTDS), a PSE prototype was used to carry out impact experiments. The results verify that the performance of the optimal method is the best compared to those of other control methods, the requirement for the sampling frequency is low, and there is almost no additional cost. In the two experiments, the first peak of the impulse current was found to be reduced by 47.49% and 33.28% on average, respectively, and the first peak of the impulse voltage was found to be reduced by 14.89% and 44.10% on average, respectively.

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Section: Equal-voltage Closingmentioning

confidence: 99%

An optimal phase control method for the suppression of phase sequence exchange impulse current and voltage

Sun

et al. 2022

IET Power Electronics

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“…The research methodology includes mechanism analysis, simulation calculations and field experiments. 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.…”

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)

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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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“…To reduce voltage surge, solid-state switches usually work with passive voltage clamping circuits [9]- [18], in which MOV [9], [10], paralleled MOVs [11], pure capacitor (C) [12], resistor-capacitor (RC) [13]- [15] and RCD snubbers (with MOV) [16]- [18] have been proposed for SSCBs. MOV is an effective passive voltage clamping component commonly used to protect switches from voltage overshoot.…”

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%

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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Overvoltage Estimation by Stray Inductances During Turn-off of a 500 kV/25 kA DC Circuit Breaker

Cited by 21 publications

References 13 publications

An optimal phase control method for the suppression of phase sequence exchange impulse current and voltage

An optimal phase control method for the suppression of phase sequence exchange impulse current and voltage

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

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

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