Harmonic compensation method and device of inverter circuit and terminal equipment
An inverter circuit and harmonic compensation technology, applied in the direction of harmonic reduction devices, output power conversion devices, electrical components, etc., can solve problems such as poor compensation of high-order harmonics, and achieve the effect of improving efficiency
Active Publication Date: 2021-04-20
ZHANGZHOU KEHUA ELECTRIC TECH CO LTD
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Problems solved by technology
[0004] In view of this, an embodiment of the present invention provides a harmonic compensation method, device and terminal equipment for an inverter circuit to solve the problem of poor compensation for high-order harmonics in the inverter circuit in the prior art
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[0023] In the following description, specific details such as specific system structures and technologies are presented for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present invention. It will be apparent, however, to one skilled in the art that the invention may be practiced in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
[0024] In order to illustrate the technical solutions of the present invention, specific examples are used below to illustrate.
[0025] see figure 1 , an embodiment of the present invention provides a harmonic compensation method for an inverter circuit, including:
[0026] S101: Obtain the monitoring data of the target inverter circuit in the first time interval; the first time interval is the...
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The invention is suitable for the technical field of power electronics, and provides a harmonic compensation method and device for an inverter circuit and terminal equipment. The method comprises the steps: obtaining the monitoring data of a target inverter circuit in a first time interval, wherein the first time interval is the time interval where the moment when the value of a current signal is zero; determining a target limit value corresponding to the monitoring data according to the monitoring data and a monitoring data-limit value corresponding relation; and generating a PWM control signal based on the carrier of the target inverter circuit, an initial modulation wave and the target limit value, wherein the PWM control signal is used for controlling the target inverter circuit to compensate the current harmonic of the target inverter circuit in the first time interval. According to the harmonic compensation method of the inverter circuit, the target limit value can be adaptively determined according to the dynamic change of the monitoring data of the target inverter circuit so that effective harmonic compensation is performed on the inverter circuit on the premise of not performing a large amount of calculation, and the harmonic compensation efficiency is improved.
Description
technical field [0001] The invention belongs to the technical field of power electronics, and in particular relates to a harmonic compensation method, device and terminal equipment for an inverter circuit. Background technique [0002] In the inverter circuit, the modulation wave output by the carrier and the control loop is modulated to generate a PWM control signal, and the PWM control signal is used to control the switching tube. When the current value of the current flowing through the switching tube is close to zero, the harmonic interference is more obvious, and the current value may increase or decrease sharply, that is, the current will be distorted. [0003] When performing harmonic compensation on the current output by the inverter circuit, the current common method is to use the control algorithm for harmonic compensation. However, the control algorithm can only effectively compensate low-order harmonics. When there is a large proportion of high-order harmonics ,...
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Login to View More IPC IPC(8): H02M1/12H02M7/5395
CPCY02E40/40
Inventor 卢雄伟郑延敏陈培钦张杰
Owner ZHANGZHOU KEHUA ELECTRIC TECH CO LTD