Switching Surge of Shunt Reactor Caused by SF<sub>6</sub> Circuit Breaker Operation

Kawada, Hiroaki; Goto, Kenta; Hanamura, Makoto; Yanabu, S.; Nishiwaki, S.; Ueda, Takashi; Murayama, Y.

doi:10.1109/mper.1987.5526747

Cited by 12 publications

(5 citation statements)

References 4 publications

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“…The chopping current of the circuit breaker was detected to be between 0 and 30 A. As both the objects studied in this paper and in [19] are a SF 6 puffer circuit breaker, the chopping coefficient λ has the same range. Compared with the shunt reactor in [19], the voltage and capacity of the 66 kV, 20 MVA shunt reactor in this paper are much smaller, and the stray capacitance is much smaller.…”

Section: ) Breaker Modelmentioning

confidence: 74%

“…As both the objects studied in this paper and in [19] are a SF 6 puffer circuit breaker, the chopping coefficient λ has the same range. Compared with the shunt reactor in [19], the voltage and capacity of the 66 kV, 20 MVA shunt reactor in this paper are much smaller, and the stray capacitance is much smaller. Therefore, the total capacitance C t is small, and the chopping current is 0-13 A in this paper.…”

Section: ) Breaker Modelmentioning

confidence: 99%

“…C t is the total capacitance of the external circuit and the circuit breaker in parallel [17], [18]. In [19], a SF 6 circuit breaker with a rated voltage of 300 kV was used to switch a 275 kV, 150 MVA reactor in the laboratory. The chopping current of the circuit breaker was detected to be between 0 and 30 A.…”

Section: ) Breaker Modelmentioning

confidence: 99%

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Breaking Overvoltage of Dry-Type Air-Core Shunt Reactors and its Cumulative Effect on the Interturn Insulation

et al. 2019

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The mechanism of overvoltage formation in the breaking process of a dry-type air-core shunt reactor (DTACSR) is studied in this paper. In addition, the effect of the overvoltage on the interturn insulation characteristics of the DTACSR is also discussed. Based on the actual working condition of a 66 kV DTACSR used in the Chinese power system, a three-phase simulation model and an equivalent circuit are proposed. The maximum chopping overvoltage and reignition overvoltage are obtained through the combination of theoretical analysis, simulation, and data fitting. An overvoltage accumulation test of the interturn insulation specimens is carried out with our established test platform, and the characteristic parameters of the interturn insulation specimens of the DTACSR in different stages of aging are measured. The results show that the combined method is very effective in evaluating the switching overvoltage of the DTACSR. Compared with the traditional single-phase circuit model, the proposed three-phase circuit model obtains a more accurate overvoltage equation. During the breaking process of a DTACSR, a chopping overvoltage with an amplitude greater than 5 p.u. and a reignition overvoltage with an amplitude greater than 8 p.u. may form. The cumulative effect of the overvoltage causes aging of the interturn insulation, and the degree of aging becomes more serious as the amplitude of the overvoltage increases.INDEX TERMS Dry-type air-core shunt reactor, overvoltage, interturn insulation, cumulative effect.

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Section: ) Breaker Modelmentioning

confidence: 74%

Section: ) Breaker Modelmentioning

confidence: 99%

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Breaking Overvoltage of Dry-Type Air-Core Shunt Reactors and its Cumulative Effect on the Interturn Insulation

et al. 2019

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“…If high-frequency arc extinction takes place, repeated cycles of re-ignition and arc extinction may occur, thus causing multiple re-ignitions; on the other hand, the voltage may increase gradually [1,2], causing an overvoltage that is dangerous for the insulation of the equipment.…”

Section: Re-ignition Phenomena Related To Reactor Current Interruptionmentioning

confidence: 99%

“…Transformer CT1 was intended to measure the total HF current; transformer CT2 was used to measure small signals around the zero points of the HF current, and hence a diode clipper was connected at the output [2]. Transformer CT1 was intended to measure the total HF current; transformer CT2 was used to measure small signals around the zero points of the HF current, and hence a diode clipper was connected at the output [2].…”

Section: Test Circuit and Measurement Of High-frequency Currentmentioning

confidence: 99%

Re‐ignition surge and high‐frequency arc extinction phenomena at 550‐kV shunt reactor current interruption

et al. 2001

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At substations connected with transmission lines and cables, shunt reactors are sometimes installed to compensate the capacitive current of these lines and cables. It is known that re-ignitions occur and high-frequency currents flow during interruption of the shunt reactor currents by switches. When the high-frequency currents are interrupted immediately after the re-ignitions (which is called high-frequency arc extinction), the result is often repetitive re-ignitions or voltage escalations that produce dangerous overvoltages.The authors investigated the occurrence of high-frequency arc extinctions in a 550-kV one-break SF 6 gas circuit breaker during interruption of a 550-kV shunt reactor current. Computations for a real 550-kV substation gave a minimum frequency of 290 kHz for the high-frequency current. However, 550-kV reactor current interruption tests showed that high-frequency arc extinctions did not occur even when this frequency was lowered to 26 kHz. Since high-frequency arc extinction is generally likely to occur at lower frequencies, it was concluded that high-frequency arc extinction will not occur in a 550-kV one-break SF 6 gas circuit breaker during interruption of shunt reactor current in real substations. © 2001 Scripta Technica, Electr Eng Jpn, 136(2): 1825, 2001

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Parasitic arcing in EHV circuit breakers

Liu

Chaaraoui

Wood

et al. 1993

IEE Proc. A Sci. Meas. Technol. UK

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Switching Surge of Shunt Reactor Caused by SF₆ Circuit Breaker Operation

Cited by 12 publications

References 4 publications

Breaking Overvoltage of Dry-Type Air-Core Shunt Reactors and its Cumulative Effect on the Interturn Insulation

Breaking Overvoltage of Dry-Type Air-Core Shunt Reactors and its Cumulative Effect on the Interturn Insulation

Re‐ignition surge and high‐frequency arc extinction phenomena at 550‐kV shunt reactor current interruption

Parasitic arcing in EHV circuit breakers

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Switching Surge of Shunt Reactor Caused by SF6 Circuit Breaker Operation

Cited by 12 publications

References 4 publications

Breaking Overvoltage of Dry-Type Air-Core Shunt Reactors and its Cumulative Effect on the Interturn Insulation

Breaking Overvoltage of Dry-Type Air-Core Shunt Reactors and its Cumulative Effect on the Interturn Insulation

Re‐ignition surge and high‐frequency arc extinction phenomena at 550‐kV shunt reactor current interruption

Parasitic arcing in EHV circuit breakers

Contact Info

Product

Resources

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Switching Surge of Shunt Reactor Caused by SF₆ Circuit Breaker Operation