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High-capacity square wave impact current generator

A technology of current generator and square wave impulse, which is applied in the field of large-capacity square wave impulse current generator for UHV arrester test, which can solve the problems of large inductance value, disconnection damage, large electromotive force, etc., so as to avoid bearing current Large, easy-to-make effects

Active Publication Date: 2008-07-23
STATE GRID ELECTRIC POWER RES INST
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Problems solved by technology

[0003] The long-duration impulse current generator is usually realized by LC centralized parameter single-chain network. In this method, the inductance value of a single inductor is large. Due to the large current passing through the inductor coil, the electromotive force generated is also large, and it is very easy to break the line and damage it. Phenomenon

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  • High-capacity square wave impact current generator

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Embodiment Construction

[0013] Explanation of marks in the drawings: K: AC contactor; T 1 : Regulator; T 2 : high voltage test transformer; D: high voltage silicon stack; R 1 : charging protection resistor; L A1 ~ L An : a chain of wave-tuning inductors; C A1 ~C An : a chain capacitor; L B1 ~ L Bn : Two-chain wave-tuning inductor; C B1 ~C Bn : Second-chain capacitor; G: Discharge gap; Rs: Tube shunt; Rx: Sample.

[0014] As shown in Fig. 2, the embodiment of the present invention is a double-chain large-capacity square wave impulse current generator, which includes a charging circuit and a discharging circuit. The charging circuit is controlled by the voltage regulator T 1 , High voltage test transformer T 2 , a high-voltage silicon stack D, a charging protection resistor R and a double-chain parallel L-C energy storage unit are electrically connected in sequence;

[0015] The discharge circuit is composed of a double-chain parallel L-C energy storage unit, a discharge gap G, a tubular sh...

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Abstract

The invention relates to a large capacity square-wave impacting current generator, which is particularly applied to a test on a super high voltage lightning arrester. The invention comprises a charging return circuit and a discharging return circuit, wherein the charging return circuit comprises a voltage regulating device, a high voltage test transformer, a high-voltage silicon stack, a charging protecting electric resistance, a capacitance and a wave regulating electric inductance which are electrically connected in turn, the discharging return circuit comprises a capacitance, a wave regulating electric inductance, a discharging gap G, a tube type diffluence device Rs and a test product Rx which are electrically connected in turn, and the capacitance and the wave regulating electric inductance are formed into an L-C energy storing unit. The invention is characterized in that the L-C energy storing unit is a double chains parallel type or multiple chains parallel type, which has the advantages of large current amplitude which is generated, easy quality control for unit components, convenient wave regulation and amplitude modulation, long service life of a whole device and the like.

Description

technical field [0001] The patent of the present invention relates to a large-capacity square-wave impulse current generator, in particular to a large-capacity square-wave impulse current generator for testing UHV arresters. Background technique [0002] According to the requirements of the technical specifications for metal oxide surge arresters with porcelain jackets for 1000kV systems, the long-duration surge current withstand test is a must. The long-duration impulse current is further divided into 2ms square wave impulse current and line discharge, of which the 2ms square wave impulse withstand current can be as high as 8000A, the line discharge level is 5, and the apparent peak duration of the discharge current is 3200μs. [0003] The long-duration inrush current generator is usually realized by LC centralized parameter single-chain network. In this method, the inductance value of a single inductor is large, and the electromotive force generated by the inductor coil is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M5/12G01R31/327
Inventor 王保山李泽贾锦朝王维洲汤霖梁菊霞
Owner STATE GRID ELECTRIC POWER RES INST
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