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AC stabilivolt method using instantaneous comparison and waveform correction as well as AC stabilivolt device thereof

A technology of AC voltage regulation and waveform correction, applied in the direction of regulating electrical variables, control/regulating systems, instruments, etc., can solve the problems of electrical equipment failing to play a protective role, distortion, and harmonic pollution of the power grid.

Inactive Publication Date: 2010-01-13
牛世斌 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of regulated power supply generally has poor voltage regulation effect, and the voltage regulation accuracy is about 1% to 0.5%, and there are still the following problems:
[0004] (1) The use of nonlinear reactance devices often brings harmonics, which does not improve the grid voltage waveform, and some have additional waveform distortion, causing harmonic pollution to the grid
[0005] (2) The sampling time and actuator action time are too long
These regulated power supplies have no time to respond and execute the fast-changing disturbances in the grid voltage, such as surges, sags, pulse disturbances, and high-frequency disturbances, which cause disturbances to pass through the voltage stabilizing device and reach the electrical equipment, which cannot affect the electrical equipment. to the protective effect

Method used

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  • AC stabilivolt method using instantaneous comparison and waveform correction as well as AC stabilivolt device thereof
  • AC stabilivolt method using instantaneous comparison and waveform correction as well as AC stabilivolt device thereof
  • AC stabilivolt method using instantaneous comparison and waveform correction as well as AC stabilivolt device thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Embodiment 1 (an embodiment of an AC voltage stabilization method):

[0060] like figure 1 , 2 As shown, the method steps of the AC voltage stabilization method of the present invention are as follows:

[0061] (1) First, a signal generator generates a sine wave reference voltage with the same frequency and phase as the grid voltage with stable amplitude

[0062] (2) To grid voltage the fluctuation of

[0063] a. Use the first sampler to measure the grid voltage For sampling, the transformation ratio coefficient of the first sampler is 1 / A, and the collection value of the first sampler is

[0064] Pick: A = U * s / U * r - - - ( 1 )

[0065] grid rated voltage;

[0066] U ...

Embodiment 2

[0103] Embodiment 2 (AC voltage stabilizer):

[0104] Depend on figure 2 , 3 It can be seen that the AC voltage stabilization device described in this embodiment 2 is composed of a grid voltage stabilization circuit and an output voltage stabilization circuit; the grid voltage stabilization circuit consists of a first sampler, a first comparator, a first amplifier, a first inverter It is composed of a coupling transformer and a reference voltage; the input end of the first sampler is connected in parallel with the grid voltage, the output end of the first sampler is connected to the input end of the first comparator, the reference voltage is connected to the other input end of the first comparator, and the comparison The output end of the device is connected to the input end of the first inverse coupling transformer through the first amplifier, and the output end of the first inverse coupling transformer is connected in series with the grid voltage;

[0105] The output volt...

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PUM

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Abstract

The invention relates to an alternative current stabilization method which utilizes instant comparison and waveform correction, and a relative alternative current stabilizer. The inventive method uses a voltage stabilizing circuit to generate a control voltage with same amplitude and reversed direction of electric network voltage to counteract the fluctuation of electric network voltage. The inventive device is composed of an electric network voltage stabilizing circuit and an output voltage stabilizing circuit, wherein the electric network voltage stabilizing circuit is composed of a first sampler, a first comparator, a first amplifier, a first inversion coupling transformer and a reference voltage, and the output voltage stabilizing circuit is composed of a second sampler, a second comparator, a second amplifier, a second inversion coupling transformer and the reference voltage. The invention has the advantages of high response speed, wide input voltage application range and high stabilization precision.

Description

technical field [0001] The invention relates to an AC voltage stabilization method and an AC voltage stabilization device using instantaneous comparison and waveform correction. Background technique [0002] The fluctuation of the power supply voltage is one of the reasons for the failure of electrical equipment. Therefore, some electrical equipment needs to use a regulated power supply to ensure its normal operation. At present, the commonly used regulated power supplies include sliding contact type, variable reactor type, and magnetic saturation type automatic regulated power supply in which a servo motor drives a voltage regulating transformer. [0003] In principle, the above-mentioned stabilized power supply samples the grid voltage, then compares and adjusts it with a servo motor or a non-contact switch, so that the AC voltage can be output stably. This type of regulated power supply generally has poor voltage regulation effect, and the voltage regulation accuracy is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05F1/44
Inventor 牛世斌胡长胜
Owner 牛世斌