Parameter tester of nonlinear resistor
A non-linear resistance, parameter testing technology, applied in the measurement of resistance/reactance/impedance, instruments, measuring devices, etc., can solve the problems of low measurement accuracy, poor adaptability, low precision, etc., to ensure measurement accuracy, easy to carry, easy to operate easy effect
Active Publication Date: 2018-11-20
JIANGSU ELECTRIC POWER CO
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Problems solved by technology
For harmonic elimination resistors of 35kV and below, the voltage under power frequency current is 150-3000V (peak value / ), the voltage is low. For the 50kV step-up test transformer, if the attached instrument winding is used to measure, the voltage is less than 6V, which has the disadvantages of difficult measurement and low precision. Connect a 10kV voltage transformer in parallel and measure the voltage on its low-voltage side
This method has problems such as complex on-site operation, inconvenient equipment to carry, low measurement accuracy, and poor adaptability.
Method used
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Embodiment 1
[0024] Embodiment one: as attached figure 1 And attached figure 2 As shown, a non-linear resistance parameter tester for parameter testing of non-linear resistance includes a voltage regulator, a step-up transformer, a control circuit and a human-computer interaction module integrated in a box. The box adopts a portable solution, for example, it may include a body and a handle arranged on the body. The voltage regulator, step-up transformer, and control circuit are arranged in the body, and the human-computer interaction module is arranged on a certain surface of the body, and a connecting terminal for wiring is arranged on the body.
[0025] The voltage regulator is connected to the external 220V power supply, the step-up transformer is connected to the voltage regulator, the non-linear resistance to be tested is connected to the output terminal of the step-up transformer, and the control circuit is connected to the voltage regulator and the non-linear resistance respective...
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The invention relates to a parameter tester of a nonlinear resistor. The tester comprises a voltage regulator, a boost transformer, a control circuit and a man-machine interaction module; the voltageregulator is connected with an external power supply and outputs an adjustable voltage signal under control of a control signal; the boost transformer is connected with the voltage regulator and converts the voltage signal output by the voltage regulator into a test voltage signal needed by parameter test; the control circuit is connected with the voltage regulator and the nonlinear resistor; theman-machine interaction module is connected with the control circuit, inputs a parameter signal and displays a parameter test result; the voltage regulator, the boost transformer, the control circuitand the man-machine interaction module are integrated in a casing; and the control circuit further comprises a current adjustment unit which outputs the control signal on the basis of the parameter signal and the test voltage signal and a current measurement unit for measuring the voltage between the two ends of the nonlinear resistor and calculates the current in the nonlinear resistor. Differentdevices needed by parameter test are integrated, the measuring precision can be ensured, manual operation is not needed, and the tester is convenient to carry and operate and widely applicable.
Description
technical field [0001] The invention relates to a non-linear resistance parameter tester used in a power system to test the parameters of non-linear resistances such as silicon carbide resistance and metal oxide resistance to verify whether they are qualified. Background technique [0002] At present, in the power system, the silicon carbide resistor (a kind of nonlinear resistor) is widely used as the harmonic elimination resistor, which is used in the 6-35kV neutral point ungrounded power grid, and the harmonic elimination resistor is connected in series with the voltage transformer. Between the neutral point and the ground to prevent the harm caused by the ferromagnetic resonance of the electromagnetic voltage transformer. Therefore, in the commissioning and daily operation, the parameters of the resonance elimination resistor are tested to verify whether it is qualified or not, which is related to the stability of the power grid. safe operation. [0003] For the harmoni...
Claims
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IPC IPC(8): G01R27/14
CPCG01R27/14
Inventor 徐近龙潘晓明叶芳王国栋高琦黄海飞杨筱艳
Owner JIANGSU ELECTRIC POWER CO