Mathematical modeling of SF/sub 6/ puffer circuit breakers. I. High current region

Park, K.Y.; Pang, Mingyu

doi:10.1109/27.510015

Cited by 25 publications

(13 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The net effect of axial convection on energy balance in the arc core becomes weaker. Ohmic heating and radiation dominate the energy transport process (curve (1) and (2) in Fig. 8b and 8c).…”

Section: Flow Environment Before Current Zeromentioning

confidence: 99%

“…Auto-expansion (self-blast) circuit breakers [1] are advantageous over puffer type gas circuit breakers (GCBs) [2] [3] in that the former utilizes the energy of the arc to build up a high pressure reservoir in the high current phase which develops and maintains high speed gas flow in the nozzles during the current zero period to cool and quench the arc. The driving energy of an auto-expansion circuit breaker is thus considerably lower than that of a puffer circuit breaker of the same switching ratings.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A comparative study of arc behaviour in an auto-expansion circuit breaker with different arc durations

Pei¹,

Zhang²,

Zhang³

et al. 2014

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

A computational study of the thermal interruption performance of a 145 kV, 60 Hz auto-expansion circuit breaker has been carried out. The pressure peak in the expansion volume has a delay of 2.8-3.4 ms with reference to the current peak when the arc duration varies. A reasonable indicator of the interruption environment is the average mass flux in the main nozzle. The short arc duration case (12.25 ms) is the most difficult case with the lowest critical rate of rise of recovery voltage (RRRV) of 10 kV/μs, just above the initial system applied RRRV of 9 kV/μs. This is a result of insufficient gas flow cross sectional area between the live contact and the main nozzle to develop rapid gas flow for arc cooling. The auxiliary nozzle plays two roles. It provides blockage in the high current phase to reduce gas exhaustion from the main nozzle into the hollow contact; after current zero the hollow contact shares a considerable portion of the system recovery voltage, especially for the short arc duration case (36%). Therefore the proper design and use of an auxiliary nozzle is key to enhancing the thermal interruption capability of high voltage auto-expansion circuit breakers.

show abstract

Section: Flow Environment Before Current Zeromentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A comparative study of arc behaviour in an auto-expansion circuit breaker with different arc durations

Pei¹,

Zhang²,

Zhang³

et al. 2014

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

show abstract

“…In different dielectric medium circuit breakers under different operation condition, the arcs are at various conditions. And the interaction of SF 6 arc, electromagnetic and compressible, viscous and turbulent gas results in the interrupting performance of the circuit breakers in the time and space exhibit a random nonlinear behavior [2][3]. Therefore, it is essential to study the behavior of arc in SF 6 CB and provide the theoretical guidance for the research on the dynamic behavior of the arc and dielectric recovery characteristics in SF 6 CB.…”

Section: Introductionmentioning

confidence: 98%

Study on Arc Chaos for SF6 Circuit Breaker Based on Coupled Physical Field Simulation

Han

Liu

Xue

et al. 2010

2010 International Workshop on Chaos-Fractal Theories and Applications

View full text Add to dashboard Cite

Based on the N-S and Maxwell equation, a mathematical model describing the arc behavior in SF 6 circuit breaker (CB) has been deduced. The effect of Lorentz force, turbulent and physical parameters on the characteristic of arc plasma was considered in the model. Using the finite volume method, the distributions of controlling parameters for arc in SF 6 circuit breaker, such as viscosity, electric conductivity, heat diffusion and heat conductivity have been calculated. By linearizing a set of nonlinear differential equation for arc model according to the theory of differential geometry, arc instable property has been analyzed and nonlinear differential equations with constant coefficient for arc in SF 6 CB has been obtained. By adjusting the controlling parameter of arc in SF 6 CB, the variations of amplitude parameters and phase trajectory in the phase space with time have been analyzed. The calculation results show that the nonlinear system for SF 6 CB has significant chaotic behavior.

show abstract

“…In this case, macroscopic evaluations focused on flow conditions will be effective. References [6,7] evaluate the interrupting performance in correlation with the flow properties. The current study deals with supersonic flow inside the nozzle at the time around a peak value of the TRV briefly after current interruption, where performance indexes evaluating the dielectric strength are the flow velocity and shock wave position.…”

Section: Introductionmentioning

confidence: 99%

Performance Prediction Method Considering Shock Wave in Nozzle for High-Voltage Circuit Breaker

Terada

Urai

Nishimura

et al. 2019

PPT

View full text Add to dashboard Cite

Interrupting-performance indexes that reflect the physical properties of gas flow are proposed for a breaker terminal fault of a high-voltage circuit breaker. A method of evaluating the shock wave and flow velocity was developed that uses a theoretical equation of supersonic flow which takes into account the nozzle’s shape and stagnation pressure. The predicted flow velocities and positions at which the shock wave forms have strong correlations with the test results.

show abstract

Mathematical modeling of SF/sub 6/ puffer circuit breakers. I. High current region

Cited by 25 publications

References 9 publications

A comparative study of arc behaviour in an auto-expansion circuit breaker with different arc durations

A comparative study of arc behaviour in an auto-expansion circuit breaker with different arc durations

Study on Arc Chaos for SF6 Circuit Breaker Based on Coupled Physical Field Simulation

Performance Prediction Method Considering Shock Wave in Nozzle for High-Voltage Circuit Breaker

Contact Info

Product

Resources

About