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Four-parameter transient recovery voltage (TRV) regulating circuit

A technology for transient recovery of voltage and regulation of circuits, used in circuit breaker testing, measuring electricity, measuring electrical variables, etc.

Inactive Publication Date: 2019-12-03
DONGGUAN GUANGAN ELECTRIC TESTING CENT
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If the test voltage level increases, this shortcoming will be more prominent

Method used

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  • Four-parameter transient recovery voltage (TRV) regulating circuit
  • Four-parameter transient recovery voltage (TRV) regulating circuit

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Embodiment Construction

[0018] In order to describe the technical content, structural features, realization principle, purpose and effect of the present invention in detail, the following will be described in detail in conjunction with the embodiments and accompanying drawings.

[0019] Such as Figure 1 to Figure 3 As shown, the present invention discloses a four-parameter transient recovery voltage (TRV) adjustment circuit, which is used for high-voltage AC circuit breaker breaking test. The TRV adjustment circuit includes a first RC frequency modulation circuit and a second RC frequency modulation circuit connected in parallel and a delay capacitor C d . The first RC frequency modulation circuit is used to adjust the oscillation frequency and amplitude of the TRV waveform generated by the TRV adjustment circuit, the second RC frequency modulation circuit is used to adjust the oscillation frequency and amplitude of the TRV waveform after the inflection point B of the rising phase, and the second R...

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Abstract

The invention discloses a four-parameter transient recovery voltage (TRV) regulating circuit for an on-off test of a high-voltage alternating-current circuit breaker. The TRV regulating circuit comprises a first RC frequency modulation circuit, a second RC frequency modulation circuit and a time delay capacitor which are connected in parallel. The second RC frequency modulation circuit is used foradjusting the oscillation frequency and amplitude of a TRV waveform after an inflection point of a TRV waveform at the rising stage and is connected in series with a nonlinear resistor; and when theexperimental voltage reaches the voltage corresponding to the inflection point of the TRV waveform, the nonlinear resistor is activated, so that the second RC frequency modulation circuit is in conduction. According to the four-parameter transient recovery voltage (TRV) regulating circuit disclosed by the invention, the non-linear resistor is used in the second RC frequency modulation circuit to replace a traditional electric reactor and the requirements for parameters such as the nominal discharge current and the square wave through-flow capacity of the non-linear resistor are low, so that the size, the weight and the cost of the used non-linear resistor are only about 1% of the existing reactor.

Description

technical field [0001] The invention relates to the technical field of breaking test circuits for high-voltage AC circuit breakers, in particular to a four-parameter transient recovery voltage (TRV) regulating circuit for breaking tests of high-voltage AC circuit breakers. Background technique [0002] High-voltage AC circuit breakers are mainly used to quickly and reliably cut off short-circuit faults in the power system, and it is essential to ensure the safe and stable operation of the system. Due to the complexity of the breaking process of the circuit breaker, it is still not possible to completely rely on calculation to guarantee the breaking performance of the circuit breaker at this stage. The actual breaking capacity of the circuit breaker can only be assessed by short-circuit breaking and other tests at present. These tests are usually performed on direct test loops or synthetic test loops in high-pressure high-volume laboratories. During the short-circuit breaki...

Claims

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Application Information

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IPC IPC(8): G01R31/327G01R1/20
CPCG01R1/20G01R31/3275
Inventor 周小猛林志力苗本健李赛赛郭向荣丁锦华刘成许丁晓军
Owner DONGGUAN GUANGAN ELECTRIC TESTING CENT
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