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Method, device, equipment and storage medium for determining power quality level in power grid

A power quality and power grid technology, applied in harmonic reduction devices, AC networks to reduce harmonics/ripples, active power filtering, etc., can solve problems such as low accuracy of harmonic voltage and harmonic current compensation

Active Publication Date: 2022-02-25
CHINA CREC RAILWAY ELECTRIFICATION BUREAU GRP +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] However, in the traditional technology, the hysteresis comparator is used to compensate the harmonic current detected by the dq0 conversion method, and the parallel active filter is used to compensate the harmonic voltage detected by the dq0 conversion method, resulting in accurate compensation of harmonic voltage and harmonic current degree is not high

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  • Method, device, equipment and storage medium for determining power quality level in power grid
  • Method, device, equipment and storage medium for determining power quality level in power grid

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Embodiment Construction

[0073] In order to make the objects, technical solutions and advantages of the present application, the present application will be described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended to explain the present application and is not intended to limit the present application.

[0074] The power quality level determining method in the grid provided by the application is, and its execution body can be a power quality level determination device in a grid, and the power quality level determination device in the grid can be achieved by software, hardware or hardware and hardware. Part or all of the computer device. Optional, the computer device can be an electronic device such as a tablet, such as a Persodal Computer, a PC, a Persodal Computer, a PC, a laptop, a laptop, a smartphone, a tablet, and a portable wearable device. For example, a tablet. Mobile phone, etc., the spec...

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Abstract

The present application relates to a method, a device, a device and a storage medium for determining a power quality level in a power grid. The method includes: obtaining the harmonic current to be compensated and the harmonic voltage to be compensated in the power grid; performing current adjustment processing on the harmonic current to be compensated according to the current comparison result between the harmonic current to be compensated and the actual compensation current , to obtain a harmonic current adjustment result; according to the harmonic voltage to be compensated and the pre-acquired target switching time, perform voltage adjustment processing on the harmonic voltage to be compensated to obtain a harmonic voltage adjustment result; according to the harmonic current The adjustment result and the harmonic voltage adjustment result determine the target level of power quality in the power grid; wherein, the actual compensation current includes the actual output current of the current regulation inverter; the target switching time includes controlling the Time for multiple sets of power pass elements to switch and close. The method can improve the compensation accuracy of harmonic voltage and harmonic current in the power grid.

Description

Technical field [0001] The present application relates to the field of power grid control, and in particular, to a power quality level determination method, apparatus, device, and storage medium in a grid. Background technique [0002] Currently, active filter (APF) is widely used in three-phase systems to reduce harmonic pollution and improve power quality, and can regard active filters as controlled current source injection and power electronic equipment, nonlinear load The resulting harmonic current is opposite to the harmonic current, thereby effectively reducing distortion in the current and voltage waveform. [0003] In the conventional technique, the harmonic current detected by the DQ0 conversion method is compared with the actual compensation current, and the comparison results of the two are input to the input of the hysteresis comparator. Current; the harmonic voltage detected by the DQ0 transform method generates a PWM signal to enter a series active filter, thereby c...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/01
CPCH02J3/01Y02E40/40Y02E40/20H02J3/0012H02J3/1857
Inventor 林云志金涛周文钊吴佩琼李铭庄致远
Owner CHINA CREC RAILWAY ELECTRIFICATION BUREAU GRP