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power frequency sinusoidal AC electrical signal zero-crossing time detection system and method thereof

A sinusoidal AC and detection system technology, which is applied in the conversion of phase and time value in sinusoidal AC signal, detection of the moment when the amplitude of sinusoidal AC signal passes through zero point, detection system field of zero-crossing time of power frequency sinusoidal AC signal, can Solve the problem of high-accuracy detection of the zero-crossing moment of the power frequency sinusoidal AC signal, and achieve the effect of reducing computing overhead, reducing computing overhead, and reducing the number of iterations

Inactive Publication Date: 2017-07-14
STATE GRID CORP OF CHINA +1
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of high-accuracy detection of the zero-crossing moment of the power-frequency sinusoidal alternating current signal, and to provide a detection system and method for the zero-crossing moment of the power-frequency sinusoidal alternating current signal based on parameter estimation

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  • power frequency sinusoidal AC electrical signal zero-crossing time detection system and method thereof
  • power frequency sinusoidal AC electrical signal zero-crossing time detection system and method thereof
  • power frequency sinusoidal AC electrical signal zero-crossing time detection system and method thereof

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Embodiment Construction

[0042] Below in conjunction with accompanying drawing and embodiment describe in detail:

[0043] 1. System

[0044] 1. Overall

[0045] Such as figure 1 , the system includes the object under test—power frequency sinusoidal AC signal source 100;

[0046] A detection device 200 is provided;

[0047] The detection device 200 includes an AD sampling circuit 210, a main processor 220, a pulse generating circuit 230 and a pulse driving circuit 240;

[0048] The main processor 220 includes a logic and calculation circuit 221 and a controller 222;

[0049] Its connection relationship is:

[0050] The power frequency sinusoidal AC signal source 100, the AD sampling circuit 210, the logic and calculation circuit 221 and the pulse drive circuit 240 are sequentially connected to realize the AD sampling, zero-crossing moment analysis calculation and output of the measured power frequency AC signal;

[0051] The pulse generation circuit 230 and the controller 222 are respectively co...

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Abstract

The invention discloses a power frequency sinusoidal AC electrical signal zero-crossing time detection system and method thereof, relating to the time detection technology in the electrical signal measurement field. The system is characterized in that a power frequency sinusoidal AC signal source (100), an AD sampling circuit (210), a logic-to-logic circuit (221), and a pulse drive circuit (240) are successively connected; and a pulse generating circuit (230) and acontroller (222) are connected to a logic and calculation circuit (221). The method includes (1) initialization, (2) frequency parameter estimation; (3) phase parameter estimation; and (4) zero-crossing time reckoning and output. The power frequency sinusoidal AC electrical signal zero-crossing time detection system and method can effectively detect the zero-crossing time of the power frequency AC analog electrical signal; and controls the error within 1micron second, can be used for the minimal phase error measurement between the analog and digital signals, and facilitates the value traceability of phase accuracy.

Description

technical field [0001] The present invention relates to time detection technology in the field of electrical signal measurement, in particular to a detection system and method for the zero-crossing moment of a power-frequency sinusoidal alternating current signal; in particular, the present invention relates to the time detection when the amplitude of the sinusoidal alternating current signal passes through the zero point , which is mainly used for the conversion of phase and time magnitude in sinusoidal AC signals. Background technique [0002] In recent years, with the advancement of the digital transformation of the power grid, electronic transformers, analog input merging units and other equipment have been widely used in the power grid to convert analog signals into digital signals. The test of the above equipment can use the electronic transformer calibrator and the combined unit tester. The electronic transformer calibrator and the combined unit tester need to be cali...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/25G01R19/175
CPCG01R19/175G01R19/25
Inventor 雷鸣郭玥王尚鹏鄢烈奇夏天明东岳李君李俊刘恒石洪
Owner STATE GRID CORP OF CHINA
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