Test device for non-liner resistor type resonance eliminator

Abstract

The invention relates to a test device for a non-linear resistor type resonance eliminator. The test device is characterized by comprising an electronic voltage regulator, a booster transformer and a measurement circuit which are sequentially connected, wherein the measurement circuit comprises two test terminals connected with two ends of a resonance eliminator to be tested; a main controller is further provided and respectively connected with the electronic voltage regulator and the booster transformer through a measurement and control unit; and the measurement circuit is connected with the measurement and control unit and the main controller respectively through a signal isolation and conversion module. The invention has the benefits that the test device capable of detecting related parameters of the non-linear resistor type resonance eliminator is provided by adopting the high-voltage sampling signal isolation and conversion technology, and the test device can be used for detecting whether the non-linear resistor type resonance eliminator works normally or not. By adopting the test device, most direct and effective data is provided for state maintenance of the non-linear resonance eliminator, and the safe operation level of equipment is improved accordingly.

Description

technical field [0001] The invention relates to a testing device for a nonlinear resistance type resonance eliminator. Background technique [0002] In the 6-35kV PT neutral point ungrounded power grid, an electromagnetic voltage transformer (hereinafter referred to as PT) with a primary connection of YO is installed on the substation bus. Since the X terminal of the PT primary coil is grounded and the iron core is easily saturated, the This kind of PT distribution network will produce two unfavorable situations: 1. Under certain conditions, ferromagnetic resonance will occur. When the resonant overvoltage is serious, the weak insulation equipment will be damaged and cause accidents; 2. The power grid is intermittently grounded or grounded The low-frequency free component generated when it disappears deeply saturates the PT of the YO connection with a channel to the ground, and the primary coil passes through the inrush current of the ampere level, causing the PT fuse to blo...

AI Technical Summary

Problems solved by technology

For many years, the power sector has mainly relied on shaking insulation or visual inspection to measure the quality of the nonlinear resistance type resonance eliminator used for the neutral point of the voltage transformer, and indirectly understand the state of the resonance eliminator. However, the long-term operation process of the nonlinear resistance type resonance eliminator It will gradually age and affect normal operation

Shaking the insulation or visual inspection cannot accurately obtain the state of the resonance eliminator during operation, nor can it accurately reflect the fault of the resonance eliminator

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