Special withstand voltage testing device and method for power capacitor

A voltage withstand test device and power capacitor technology, which is applied in the direction of testing circuits, testing dielectric strength, etc., can solve the problems that the continuous withstand time cannot be accurately controlled, and it is difficult to meet the withstand voltage level required by the test, so as to avoid slow response time , control precise effects
CN102426327AInactive Publication Date: 2012-04-25GUILIN POWER CAPACITOR
3 Cites 7 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GUILIN POWER CAPACITOR
Publication Date
2012-04-25
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
Patent Text Reader

Abstract

The invention discloses a special withstand voltage testing device and method for a power capacitor. The special withstand voltage testing device comprises a power supply, a voltage regulator, a transformer and a serial-parallel resonant circuit which is arranged at the other side of the transformer and corresponds to the voltage regulator; the serial-parallel resonant circuit comprises a serial compensation reactor, a parallel compensation reactor, a wave-modulating resistor, a silicon controlled rectifier trigger control device, a high voltage divider and a digital storage oscilloscope, wherein the serial compensation reactor is serially connected with a testing capacitor; the parallel compensation reactor is connected in parallel with the testing capacitor; the wave-modulating resistor is connected in series in the circuit; the silicon controlled rectifier trigger control device is connected with the wave-modulating resistor; the high voltage divider and the digital storage oscilloscope are connected at two electrodes of the testing capacitor; and the serial-parallel resonant circuit is grounded. The testing method provided by the invention has the benefits that: (1) the problem of slower voltage boosting of the general voltage regulator is solved by using a method for instantaneously changing a resonant parameter to generate a high voltage; (2) the time of withstanding a high voltage on a test product can be precisely controlled by controlling the on time of a silicon controlled rectifier; and (3) the test voltage is controlled precisely and the oscilloscope can be simultaneously triggered to collect test waveforms.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a power capacitor, in particular to a special withstand voltage test device and a test method for a power capacitor. Background technique

[0002] Among all electrical equipment, the insulation working field strength of power capacitors is the highest. In the power transmission and transformation industry, in order to reduce the output and reactive power conversion of generators and transformers, and reduce the power loss of the power system, parallel power capacitor banks are generally used; in order to increase the transmission capacity of transmission lines, series compensation capacitor banks are generally used. Due to the special operating environment requirements of the series compensation device, special test items are required for the series compensation capacitor, one of which is to apply 1.35 U lim Power frequency voltage, continuous withstand time 300ms ~ 500ms. The characteristics of this test project are: high ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More