Impact voltage generating device

An impulse voltage generation and inductance technology, applied in the field of impulse voltage, can solve the problems of increasing the wave front time of the impulse voltage generator test loop inductance, and the difficulty of realizing the voltage transformer for GIS, so as to avoid flashover along the surface, easy to move, and easy to connect. short line effect

Pending Publication Date: 2018-10-19
CHINA ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As for the voltage / current transformer used in GIS, since it will suffer from high-frequency very fast transient overvoltage (Very Fast Transient Overvoltage, VFTO), the standard stipulates that the applied shock wave is a type B shock wave, and the voltage peak value is The wave front time is 10×(1±20%)ns, the wave tail time is >100ns, and the transmitted overvoltage reference waveform is as follows figure 1 As shown, it is difficult to generate such a short wave front time shock with the increase of the inductance of the test circuit of the traditional impulse voltage generator, which makes it difficult to realize the transmission overvoltage test of the voltage transformer used in GIS at the current stage under high voltage.

Method used

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Embodiment 1

[0056] An impulse voltage generating device, which includes a body, a DC high-voltage power supply, and an impact generating circuit; the DC high-voltage power supply includes a transformer, a silicon stack, and an output terminal; the DC high-voltage power supply adopts a closed structure to fix the transformer and the silicon stack Inside the body, the output terminal transmits a DC voltage to the impact generating circuit;

[0057] The structure of the impact generating circuit is a modular structure composed of modules of several levels, and the modules of each level are fixed and connected in series through supporting insulators and fixed brackets;

[0058] The modules at each level include:

[0059] High voltage pulse capacitor;

[0060] protection resistors or inductors; and,

[0061] Charging resistance or inductance;

[0062] One end of the high-voltage pulse capacitor is connected to the protective resistor or inductance through a metal flange; the other end of th...

Embodiment 2

[0066] This embodiment provides a specific implementation of the solution of the present invention, wherein the example of connection structure and number is a preferred example, and does not mean to be limited to this example.

[0067] Such as figure 1 Shown is a schematic diagram of the circuit principle of a preferred embodiment of the impulse voltage generating device of the present invention; specifically includes a DC high-voltage power supply (10kV power supply) and an impulse generation circuit (protection resistance or inductance, charging resistance or inductance, high-voltage pulse capacitance, spark ball gap switch, etc.).

[0068] Such as figure 2 Shown is a schematic cross-sectional view of a preferred embodiment of the impulse voltage generating device of the present invention; specifically, it is a single-stage module in the structure of the impulse generating circuit body, including a resistor 1, a pulse capacitor 2, and a supporting insulator 3.

[0069] T...

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Abstract

The invention discloses an impact voltage generating device. The impact voltage generating device comprises a host computer, a body, a DC high voltage power source and an impact generation loop, wherein the DC high voltage power source comprises a transformer, a silicon stack and an output end, and the host computer is fixed in the body. The impact voltage generating device is characterized in that the DC high voltage power source employs the closed structure, the transformer and the silicon stack are fixed in the body, the DC voltage is transmitted by the output end to the impact generation loop, the impact generation loop is a modular structure composed of multi-level modules, and the modules in each level are fixed and connected in series through supporting insulators and fixing supports. The impact voltage generating device is advantaged in that the transmission overvoltage in the high voltage environment can be enhanced, and safety performance can be improved.

Description

technical field [0001] The invention relates to the field of impulse voltage, in particular to an impulse voltage generating device. Background technique [0002] The following statements merely provide background information related to the present disclosure and do not necessarily constitute prior art. [0003] The transformer for power system is a kind of power grid primary voltage / current conversion to 100 / 3V, A special transformer with a secondary voltage of 100V or a secondary current of 5A and 1A is used for power metering, voltage / current measurement and relay protection of the power grid. The primary winding is connected to the power grid, and the secondary winding is connected to the measuring instrument and protection respectively. The connection of devices, etc., is the primary and secondary contact unit of the power system. Since the power system is continuously subjected to various overvoltages such as lightning and operation during operation, various overvol...

Claims

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Application Information

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IPC IPC(8): G01R1/28G01R31/12
CPCG01R1/28G01R31/1227
Inventor 刘翔姚翔宇郭利莎张杰喻明江刘勇王焱刘西超邓小聘
Owner CHINA ELECTRIC POWER RES INST
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