Harmonic compensation method, device and terminal equipment for inverter circuit
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 effect of high-order harmonics, and achieve the effect of improving efficiency
Active Publication Date: 2022-07-05
厦门科华数能科技有限公司
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[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, for the purpose of illustration rather than limitation, specific details such as specific system structures and technologies are set forth in order to provide a thorough understanding of the embodiments of the present invention. However, it will be apparent to those skilled in the art that the present 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, the following specific embodiments are used for description.
[0025] see figure 1 , an embodiment of the present invention provides a harmonic compensation method for an inverter circuit, including:
[0026] S101: Acquire monitoring data of a target inverter circuit in a first time interval...
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The invention is applicable to the technical field of power electronics, and provides a harmonic compensation method, device and terminal equipment for an inverter circuit. The method includes: acquiring monitoring data of a target inverter circuit in a first time interval, and the first time interval It is the time interval when the value of the current signal is zero; the target limit value corresponding to the monitoring data is determined according to the monitoring data and the corresponding relationship between the monitoring data and the limit value; it is generated based on the carrier wave, the initial modulation wave and the target limit value of the target inverter circuit The PWM control signal is used to control the target inverter circuit to compensate the current harmonics of the target inverter circuit in the first time interval. The harmonic compensation method of the inverter circuit provided by the present invention can adaptively determine the target limit value according to the dynamic change of the monitoring data of the target inverter circuit, so that the inverter circuit can be effectively compensated for harmonics without a large amount of calculation. , to improve the efficiency of harmonic compensation.
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 modulated 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 switch tube. When the current flowing through the switch tube is close to zero, the harmonic interference is more obvious, and there is a situation where the current value increases or decreases drastically, that is, the current will be distorted. [0003] When performing harmonic compensation on the current output by the inverter circuit, the commonly used method is to use the control algorithm for harmonic compensation. However, the control algorithm can only effectively compensate for low-order harmonics. When there is a large proportion of high-order harmonic...
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IPC IPC(8): H02M1/12H02M7/5395
CPCY02E40/40
Inventor 卢雄伟郑延敏陈培钦张杰
Owner 厦门科华数能科技有限公司