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A kind of dielectric loss tangent value test method and tester

A technology of dielectric loss angle and test method, which is used in instruments, measuring devices, measuring electrical variables, etc., can solve the problems of low test accuracy and poor real-time performance, achieve good real-time performance, small data processing capacity, and avoid measuring power factor angle. Effect

Inactive Publication Date: 2016-08-17
XIAN UNIV OF SCI & TECH
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Problems solved by technology

However, the traditional Fourier transform method has problems such as poor real-time performance and low test accuracy.

Method used

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  • A kind of dielectric loss tangent value test method and tester
  • A kind of dielectric loss tangent value test method and tester
  • A kind of dielectric loss tangent value test method and tester

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Experimental program
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Embodiment Construction

[0052] Such as figure 1 A kind of dielectric loss tangent value testing method shown, comprises the following steps:

[0053] Step 1. Acquisition of current and voltage signals: Use the current detection unit 1 and the voltage detection unit 2 to detect the operating current and operating voltage of the electrical equipment under test respectively in real time, and pass through the signal acquisition circuit 3 and according to the preset sampling frequency f s Collecting the current signal detected by the current detection unit 1 and the voltage signal detected by the voltage detection unit 2 respectively, and synchronously transmitting the current value and the voltage value collected at each sampling time to the data processor 4;

[0054] Step 2, signal processing: the data processor 4 processes the current value and the voltage value collected by the signal acquisition circuit 3 at each sampling time according to the sampling sequence; the processing of the current value an...

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Abstract

The invention discloses a dielectric loss Tan delta test method and tester. The test method comprises the steps of: first, current and voltage signal collection: detecting the work current and work voltage of an electrical device to be tested in real time, and collecting data through a signal collection circuit; and second, signal processing: processing current values and voltage values collected at each sampling time according to a sampling sequence, wherein the current value and voltage value processing comprises the steps of: 201, signal receiving and synchronous storage; and 202: calculation of dielectric loss Tan delta at a current time: data group creation and analysis and processing of signals of a next sampling time. The tester comprises a current detection unit, a voltage detection unit, a signal collection circuit and a data processor. The test method has the characteristics of reasonable design, easy realization, sound use effect, great instantaneity and high test precision, and can conveniently and rapidly test the dielectric loss Tan delta of an electrical device to be tested.

Description

technical field [0001] The invention belongs to the technical field of on-line testing of electrical equipment, and in particular relates to an on-line testing method and a testing instrument for a dielectric loss tangent value. Background technique [0002] Dielectric loss angle, leakage current and insulation dielectric capacitance Cx are three characteristic quantities to measure the insulation degree of electrical equipment. Since the dielectric loss tangent value (ie tanδ) only depends on the characteristics of the material and has nothing to do with the size and shape of the material, it is very effective to use tanδ as a parameter of the overall insulation condition of the equipment. [0003] In recent years, with the development of state detection technology, the on-line detection technology of dielectric loss (hereinafter referred to as dielectric loss) has been paid more and more attention, and a variety of detection methods have been gradually developed, mainly fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R27/26
Inventor 付周兴童永利荆雪李卓君余杨蔡文龙刘鹏
Owner XIAN UNIV OF SCI & TECH
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