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Grid-connected inverter resonance suppression method and device for enhancing anti-jamming capability of system

A technology for enhancing system and resonance suppression, applied in harmonic reduction devices, output power conversion devices, circuit devices, etc. The effect of interference capability, simplicity of implementation, and simplified control complexity

Inactive Publication Date: 2019-08-02
CHONGQING UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

[0006] In view of the above defects of the prior art, one of the purposes of the present invention is to provide a control method that can simultaneously suppress the influence of the background harmonics of the power grid and the resonant peak of the LCL filter on the grid-connected current, and can solve the problem that the existing control strategy cannot simultaneously Resonance Suppression and Interference Immunity Issues

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  • Grid-connected inverter resonance suppression method and device for enhancing anti-jamming capability of system
  • Grid-connected inverter resonance suppression method and device for enhancing anti-jamming capability of system
  • Grid-connected inverter resonance suppression method and device for enhancing anti-jamming capability of system

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Embodiment Construction

[0057] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the preferred embodiments are only for illustrating the present invention, but not for limiting the protection scope of the present invention.

[0058] Such as Figure 1 to Figure 9 Shown; A kind of grid-connected inverter resonance suppressing method of enhancing system anti-jamming capability of the present invention, it comprises: DC power supply connects inverter unit, the output of inverter is connected with LCL filter unit, connects after filtering Enter PCC point; Described method concrete steps are as follows:

[0059] S1: collect the voltage at the common coupling point, the current and the capacitive current of the LCL filter;

[0060] S2: multiplying the collected public coupling point voltage phase with a given current reference value to obtain a given reference signal of the grid-connected curren...

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Abstract

The invention discloses a grid-connected inverter resonance suppression method for enhancing anti-jamming capability of a system. The relevant signals are collected and processed and finally modulation signals are obtained. Control signals are generated by the modulation signals through a PWM modulation link to control the operation of a grid-connected inverter. The functions of full feed-forwardof network voltage and active damping can be realized only by capacitive current feed-forward and grid-connected current feedback so as to suppress the influence of grid background harmonics and LCL filter resonance peak on the grid-connected current and simplify the control complexity and have good control effect. Meanwhile, the invention also provides a grid-connected inverter resonance suppression device.

Description

technical field [0001] The invention relates to the technical field of grid-connected current control, and specifically describes a method for suppressing resonance of a grid-connected inverter that enhances the anti-interference ability of the system, and also includes a resonance suppressing device for the grid-connected inverter. Background technique [0002] Energy issues have a position that cannot be ignored in terms of power production and power work. With the gradual depletion of non-renewable energy sources worldwide, renewable energy sources such as solar energy and wind energy are gradually being developed, and more and more distributed Power is plugged into the grid as an alternative to traditional fossil fuels. The grid-connected inverter, as the key interface device between the distributed generation system and the grid, has become a research hotspot in the field of power electronics. Its inherent characteristics and complex operating conditions bring challeng...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/01H02J3/38H02M7/48H02M1/12
CPCH02J3/01H02J3/381H02M7/48H02M1/12Y02E40/40
Inventor 孙鹏菊薛统宇王林李强杜雄罗全明周雒维
Owner CHONGQING UNIV
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