Electromagnetic voltage transformer induction withstand voltage, partial discharge test device and method
A technology for voltage transformers and partial discharges, which is applied in measuring devices, instruments, measuring electrical variables, etc., can solve the problems of inability to realize the inductive withstand voltage and partial discharge simultaneous measurement of three-phase electromagnetic voltage transformers, and achieve the realization of inductive withstand voltages. Simultaneous measurement of voltage and partial discharge, improving operation efficiency and saving test time
Active Publication Date: 2021-06-04
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST +1
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Problems solved by technology
[0006] The invention provides an electromagnetic voltage transformer induced withstand voltage and partial discharge test device and method to solve the problem that the test personnel at the present stage can only carry out the AC withstand voltage test and partial discharge test on a single electromagnetic voltage transformer respectively. Unable to realize simultaneous measurement of three-phase electromagnetic voltage transformer induced withstand voltage and partial discharge
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[0049] see figure 1 , figure 1 It is a schematic diagram of the field test of the electromagnetic voltage transformer induction withstand voltage and partial discharge test device provided by the embodiment of the present invention.
[0050] An electromagnetic voltage transformer induction withstand voltage and partial discharge test device provided by the present invention includes: a power generating device, a three-phase electromagnetic voltage transformer, a partial discharge measuring device and a test voltage detection device, wherein the power generating device includes Three-phase power supply 1, low-voltage filter 2, three-phase voltage regulation and control device 3, three-phase triple frequency generator 4, transformer 5 and high-voltage filter 6; three-phase power supply 1, low-voltage filter 2, three-phase voltage regulation And the control device 3, the three-phase triple frequency generator 4, the transformer 5 and the high-voltage filter 6 are connected in se...
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The invention discloses a test device and method for induction withstand voltage and partial discharge of an electromagnetic voltage transformer. According to the rated voltage value of the three-phase electromagnetic voltage transformer, the highest voltage value of the three-phase electromagnetic voltage transformer is obtained; according to the three The highest voltage value of the phase electromagnetic voltage transformer is used to obtain the values of the induced withstand voltage test voltage U1, the partial discharge test pre-applied voltage U2 and the partial discharge test voltage U3 of the three-phase electromagnetic voltage transformer; the control power generation device adjusts the three-phase The secondary side voltage of the electromagnetic voltage transformer controls the primary side of the three-phase electromagnetic voltage transformer to sequentially generate the induced withstand voltage test voltage U1, the partial discharge test pre-applied voltage U2 and the partial discharge test voltage U3, and controls the three-phase A partial discharge is generated inside the electromagnetic voltage transformer; a primary side voltage value of the three-phase electromagnetic voltage transformer is obtained, and a discharge value of the partial discharge generated inside the three-phase electromagnetic voltage transformer is obtained.
Description
technical field [0001] The invention relates to the technical field of electric on-line monitoring, in particular to an electromagnetic voltage transformer induced withstand voltage and partial discharge test device and method. Background technique [0002] Electromagnetic voltage transformer is a high-voltage device that converts high voltage in the power grid into low voltage for easy monitoring and measurement. Structurally speaking, the electromagnetic voltage transformer is a step-down transformer with small capacity, small volume and large voltage ratio. The basic principle is the same as that of the transformer. constitute. The working principle, structure and connection method of the electromagnetic voltage transformer are the same as the transformer. Electromagnetic voltage transformers are mainly used to transmit signals, requiring the transformation ratio (ratio difference) of the primary and secondary sides and the phase difference (angle difference) of the pri...
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IPC IPC(8): G01R35/02
CPCG01R35/02
Inventor 朱启龙钱国超刘红文李昊潘浩张志磊
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST