A Harmonic Voltage Measurement Method Based on AC Quantum Voltage

A harmonic voltage and measurement method technology, applied in the field of measurement, can solve the problem that the circuit is easily affected and changed by the external environment, and achieve the effect of improving anti-interference ability, improving accuracy and weakening gain error

Active Publication Date: 2021-12-28
NAT INST OF METROLOGY CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

And the circuit is easily affected by the external environment and changes with time and environmental changes

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  • A Harmonic Voltage Measurement Method Based on AC Quantum Voltage
  • A Harmonic Voltage Measurement Method Based on AC Quantum Voltage
  • A Harmonic Voltage Measurement Method Based on AC Quantum Voltage

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Embodiment Construction

[0036] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0037] Utilize the power frequency harmonic voltage measurement method based on AC quantum voltage, including:

[0038] (1) Set the signal to be tested: generate a power frequency harmonic signal with a fundamental frequency of 45Hz to 65Hz, set the fundamental frequency, amplitude and initial phase, the amplitude and initial phase of each harmonic included, and the highest Harmonic order M≤50; sampling frequency f s Selected according to the fundamental frequency f, with the goal of realizing the whole cycle sampling, that is, the number of sampling points per cycle L=f s / f is an integer.

[0039] (2) Partial setting of AC quantum voltage generation: the number of steps N should be determined according to the number of sampling points per cycle, to ensure that the number of sampling points S on each step is an integer, that is, L=N×S; The position starts to be se...

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Abstract

The invention provides a harmonic voltage measurement method based on alternating quantum voltage, which belongs to the field of measurement. The method first generates a periodic signal containing harmonics, and then determines the sampling frequency and the number of steps. Among them, the sampling frequency should be determined according to the fundamental frequency, with the goal of realizing the whole cycle sampling. The number of steps should be determined according to the number of sampling points per cycle. Next, a ladder AC quantum voltage signal is generated, and the ladder AC quantum voltage signal should be generated according to the signal to be measured. Then sample the differential signals before and after commutation, and process them separately, that is, perform data screening and recovery, perform weighted Fourier transform on the signal data, and calculate the amplitude of the fundamental wave and harmonic contained in the measured signal and phase, and finally calculate the mean value of the results obtained before and after commutation.

Description

technical field [0001] The invention belongs to the field of metering, and in particular relates to a harmonic voltage measurement method based on alternating quantum voltage. Background technique [0002] At present, the measurement of harmonics is realized based on the method of AC sampling and Fourier transform in China, which is full waveform sampling. Due to the full waveform sampling method, the measurement error is relatively large when an analog-to-digital converter (ADC) is used, and the signal noise enters the sampling system without attenuation. Moreover, the circuit is easily affected by the external environment and changes with time and environmental changes. Programmable Josephson Quantum Voltage References (PJVS) are based on constants of nature and can generate arbitrary voltages with quantum precision. The voltage value remains constant regardless of time and external environment. The programmable Josephson quantum voltage reference has been applied to th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R23/16G01R19/25G01R25/00
CPCG01R23/16G01R19/2506G01R19/2509G01R25/00
Inventor 贾正森徐熙彤王磊周天地张江涛潘仙林石照民贺青宋莹
Owner NAT INST OF METROLOGY CHINA
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