Tester and test system for secondary harmonic elimination device
A technology for secondary harmonic elimination and tester, applied in the field of power system, can solve the problems of low safety, easily damaged relay protection tester and secondary harmonic elimination device, etc., to achieve the effect of improving safety
Inactive Publication Date: 2018-10-02
STATE GRID HUBEI ELECTRIC POWER CO XIAOGAN POWER SUPPLY CO
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Problems solved by technology
In the prior art, the relay protection tester is generally used to test the secondary harmonic elimination device, but in the process of testing, a large current is often instantaneously activated, and the relay protection tester and the secondary harmonic elimination device are easily damaged, and the safety is low.
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[0028] In order to make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. 的实施例。 Example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.
[0029] At present, the prior art generally uses a relay protection tester to test the secondary harmonic elimination device, but in the test process, it often acts instantaneously with high current, which is easy to damage the relay protection tester and the secondary resonance elimination device, and the safety is low. Based on this, the embodiment of the present invention provides a tester an...
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The invention provides a tester and a test system for a secondary harmonic elimination device. The tester comprises a harmonic generation module, an over-current protection module, a detection moduleand a data processing module. The harmonic generation module, the over-current protection module, and the detection module are connected with the data processing module and are connected with a to-be-tested secondary harmonic elimination device. The harmonic generation module is used for generating a harmonic signal of a set parameter under the control of the data processing module and sending theharmonic signal to the secondary harmonic elimination device. The detection module is configured to detect a response signal generated by the secondary harmonic elimination device after receiving theharmonic signal. The data processing module is configured to receive the response signal and determines the working state of the secondary harmonic elimination device based on the response signal. The over-current protection module is used for carrying out over-current protection on the harmonic generation module. Therefore, over-current protection is realized during the testing process of the secondary harmonic elimination device; and the testing safety is improved.
Description
Technical field [0001] The invention relates to the technical field of electric power systems, in particular to a tester and a test system of a secondary harmonic elimination device. Background technique [0002] At present, most of the internal overvoltage accidents in the power grid of 35kV and below are caused by the ferromagnetic resonance of the voltage transformer (PT, Potentialtransformer). At low frequency resonance, the general voltage is not high, and the resonance current is large, which may cause the PT to overheat and explode; at power frequency and double frequency resonance, the current is small, but the voltage is too high, which often damages the equipment insulation and causes serious accidents. The secondary resonance elimination device is an important component of the PT to eliminate resonance. In the prior art, a relay protection tester is generally used to test the secondary harmonic elimination device, but during the testing process, the relay protection t...
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IPC IPC(8): G01R31/00
CPCG01R31/00
Inventor 卢洁肖洒任贝婷肖亚平陈黎任乔林
Owner STATE GRID HUBEI ELECTRIC POWER CO XIAOGAN POWER SUPPLY CO