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Generator for simulating partial discharge signals

A discharge signal and generator technology, applied in the direction of instruments, measuring electricity, measuring electrical variables, etc., can solve the problem of not being able to adjust the amplitude, phase angle and frequency independently.

Active Publication Date: 2020-10-02
GUANGDONG POWER GRID CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]The purpose of the present invention is to overcome the disadvantages that the existing analog partial discharge generators cannot adjust the amplitude, phase angle and frequency separately, and there is no difference between positive and negative , providing a generator for simulating partial discharge signals

Method used

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  • Generator for simulating partial discharge signals
  • Generator for simulating partial discharge signals
  • Generator for simulating partial discharge signals

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Such as Figure 1 to Figure 5 Shown is an embodiment of the invention for a generator for simulating a partial discharge signal. A generator for simulating partial discharge signals, which includes an MCU control circuit, a phase signal output port and an analog signal output port, and also includes a power circuit connected to the MCU control circuit, a control key circuit, a signal display circuit, a boost circuit, Analog partial discharge signal generation circuit, internal synchronous phase circuit, external synchronous phase circuit, analog partial discharge signal generation circuit is connected with boost circuit, internal synchronous phase circuit, external synchronous phase circuit and analog signal output port; external phase input and external synchronous The phase loop is connected, the phase signal output port is connected with the inner synchronous phase loop and the outer synchronous phase loop, and the power supply loop is also connected with the control...

Embodiment 2

[0044] This example Image 6 As shown, in addition to a generator for simulating partial discharge signals in embodiment 1, this embodiment also includes a high-frequency pulse current sensor HFCT, a partial discharge detection device and a partial discharge background monitoring center to simulate the occurrence of partial discharge signals In this embodiment, the generator for simulating partial discharge signals injects simulating partial discharge signals without phase characteristics, and the discharge amounts are signals of 10Q1 and Q1 respectively, and the partial discharge detection device is calibrated. After correction, inject discharge 10Q1 partial discharge signal, the background monitoring center can detect a signal of 10Q1 of the same magnitude, inject a partial discharge signal with a discharge magnitude of Q1, and the background monitoring center 4 can detect a signal of Q1 of the same magnitude, as Figure 7 As shown in (a) and (b), the calibration of the part...

Embodiment 3

[0046] This example Figure 9 As shown, the structure of this embodiment is similar to that of Embodiment 2, and this embodiment can perform a function test on the partial discharge detection device. The generator for simulating partial discharge signals injects double-cluster simulated partial discharge signals with phase characteristics to identify the PRPD and waveform function of the partial discharge detection device. When using a generator that simulates a partial discharge signal to inject a double cluster into a partial discharge detection device, the phase difference characteristic is 180°, such as Figure 9 As shown, when the waveform has an analog partial discharge signal with positive and negative polarities, the background monitoring center can judge that the signal is a partial discharge; when the generator injects a double cluster into the partial discharge detection device 1, the phase difference characteristic is 160°, Such as Figure 10 As shown, when the w...

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Abstract

The invention provides a generator for simulating partial discharge signals. The generator comprises an external phase input, an MCU control loop, a phase signal output port and an analog signal output port, and also comprises a power supply loop, a control key loop, a signal display loop, a boosting loop, an analog partial discharge signal generation loop, an inner synchronous phase loop and an outer synchronous phase loop which are connected with the MCU control loop. The analog partial discharge signal generation loop is connected with the boosting loop, the inner synchronous phase loop, the outer synchronous phase loop and the analog signal output port; the external phase input is connected with the external synchronous phase loop, the phase signal output port is connected with the inner synchronous phase loop and the outer synchronous phase loop, and the power supply loop is connected with the control key loop and the signal display loop. According to the invention, simulated partial discharge signals with positive and negative polarity double-group phase distribution characteristics can be generated, and the amplitude, frequency and phase angle of the simulated partial discharge signals can be changed at will in the positive and negative directions.

Description

technical field [0001] The invention relates to the technical field of partial discharge detection, and more specifically, to a generator for simulating partial discharge signals. Background technique [0002] The simulated partial discharge signal generator is a very useful tool in the partial discharge test work. Since the simulated partial discharge signal generator quantitatively simulates the power transfer and discharge time of the partial discharge process with standard capacitance and more accurate voltage on the circuit, it can be used to calibrate the pulse current partial discharge sensor and partial discharge test device. The distribution characteristics of partial discharge are usually described by using the partial discharge waveform amplitude Q, the phase Φ of the amplitude and the frequency N of the waveform (the number of pulses per second), that is, the characteristic of the PRPD partial discharge map. Because partial discharge is a signal of partial break...

Claims

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Application Information

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IPC IPC(8): G01R31/12G01R1/28
CPCG01R31/12G01R1/28
Inventor 方义治崔江静周智鹏孙廷玺雷小月郭小凯蓝德添东盛刚傅国强刘颖姜志彬赵尊慧李莹
Owner GUANGDONG POWER GRID CO LTD
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