Special flicker voltage output device for testing power quality testing equipment
A voltage output and detection equipment technology, applied in the field of power grid, can solve the problems of large voltage flicker detection error, inability to calibrate the detection error of power quality detection equipment, lack of standard signal source comparison, etc.
Active Publication Date: 2018-06-29
MEIZHOU POWER SUPPLY BUREAU OF GUANGDONG POWER GRID CORP
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Problems solved by technology
[0003] When measuring stable periodic signals, the measurement and calculation errors of power quality testing equipment are mostly more than 10%. Since the voltage flicker is mostly an unsteady period, the actual measurement and calculation errors are even larger
Moreover, if the power quality testing equipment is used for a long time, it is prone to measurement errors caused by mechanical failures or other problems.
Therefore, under normal circumstances, the detection error of voltage flicker by power quality testing equipment is relatively large, but in the traditional power quality monitoring process, there is no standard signal source to compare with the detection data of power quality testing equipment, and power quality cannot be verified. Detection error of detection equipment
Method used
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[0010] refer to figure 1 , the special-purpose flicker voltage output device for verifying power quality detection equipment in an embodiment of the present invention includes a signal source 110, a processing device 130, a digital-to-analog conversion device 150, a power amplifier 170, a transformer 180 and a voltage output port 190, The digital-to-analog conversion device 150 is respectively connected to the signal source 110 , the processing device 130 and the power amplifier 170 , the transformer 180 is connected to the power amplifier 170 , and is connected to the certified power quality detection equipment 200 through the voltage output port 190 .
[0011] The signal source 110 outputs a constant-amplitude sinusoidal signal to the digital-to-analog conversion device 150, and the processing device 130 outputs a preset value to the digital-to-analog conversion device 150 according to a preset frequency of change, and the digital-to-analog conversion device 150 outputs a fla...
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The invention relates to a flicker voltage output device, comprising a signal source, a processing device, a digital-to-analog conversion device, a power amplifier, a transformer and a voltage output port, the digital-to-analog conversion device is respectively connected to the signal source, the processing device and the power amplifier, and the transformer is connected to the power The amplifier is connected to the power quality detection equipment through the voltage output port; the signal source outputs a constant-amplitude sinusoidal signal to the digital-to-analog conversion device, and the processing device outputs a preset value to the digital-to-analog conversion device according to the preset frequency of change. The sinusoidal signal and the preset value output the flicker signal to the power amplifier, the power amplifier outputs the amplified flicker signal to the transformer, and the transformer outputs the flicker voltage to the verified power quality testing equipment. The flicker voltage is output to the power quality testing equipment as a standard signal, which can be used for the verification of the power quality testing equipment.
Description
technical field [0001] The invention relates to the technical field of power grids, in particular to a special flicker voltage output device used for testing power quality detection equipment. Background technique [0002] Voltage flicker refers to the voltage fluctuation in the power grid, which is an important parameter of power quality standards. When the power quality testing equipment measures and analyzes the AC power quality supplied from the power grid to the user's power receiving end, the measurement and analysis of voltage flicker is usually calculated according to the detected grid voltage data and according to the calculation method recommended by the national standard before the 2000 version. [0003] When measuring stable periodic signals, the measurement and calculation errors of power quality testing equipment are mostly more than 10%. Since the voltage flicker is mostly an unsteady period, the actual measurement and calculation errors are even larger. More...
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IPC IPC(8): G01R35/00
Inventor 韩金尅邹练辉梁江东梁敬韩雄辉杨志强黄志刚潘文博廖明黄乐黄建文张建涛冯文晴丘仕锋
Owner MEIZHOU POWER SUPPLY BUREAU OF GUANGDONG POWER GRID CORP