Method for restraining 4-order Boost converter resonance

A converter and resonance technology, which is applied in the field of switching power converters, can solve problems such as unsatisfactory effects, and achieve the effects of improving the stable output power range, protecting circuits, and enhancing stable performance

Active Publication Date: 2016-04-13
NANJING GONGCHENG RES INST OF ENERGY CONSERVATION & NEW MATERIALS TECH CO LTD
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0004] Although the above two typical methods can solve the resonance problem caused by the input filter to a certain extent, the effect achieved by this method is not ideal

Method used

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  • Method for restraining 4-order Boost converter resonance
  • Method for restraining 4-order Boost converter resonance
  • Method for restraining 4-order Boost converter resonance

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Embodiment Construction

[0036] The present invention will now be further described in conjunction with the embodiments and drawings:

[0037] In this embodiment, the specific content of the method for suppressing resonance will be given on the basis of real data according to the specific method and steps of the present invention. The feasibility and effectiveness of this method are proved through theoretical analysis and simulation experiment results.

[0038] 1. System modeling

[0039] The system structure targeted by the present invention is as follows figure 1 As shown, the system consists of four parts: main power supply, LC low-pass filter, DC-DC converter and load. The main power source is composed of an AC power source and a rectifier. The AC power source can be the rear stage of the aircraft's three-stage power generation system, wind turbine generators, and AC microgrids. In order to simplify the analysis, the main power supply is equivalent to a constant voltage DC power supply. The DC-DC con...

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Abstract

The invention relates to a method for restraining 4-order Boost converter resonance. A compound-control closed loop topological structure is adopted; on a basis of conventional dual-closed-loop feedback control, current in a front-stage LC filter circuit is subjected to high-pass filtering, and acts on a system control terminal at certain proportional gain; a feedforward compensation technology for the 4-order Boost converter based on high frequency current at the resonant frequency of an input filter is designed; according to the compensation technology based on the high frequency current signals at the resonant frequency of the input filter provided by the invention, the stable output power range is expanded, and the system stability is reinforced under the premise of not changing the original system structure; the resonance phenomenon of the system can be effectively restrained and the circuit can be protected; and in addition, the compensation technology based on the high frequency current signals at the resonant frequency of the input filter provided by the invention can be widely applied to the fields of independent power supplies and transportation, such as pure electric vehicles, ships, submarines and the like, and is expected to be widely applied to the future electric power systems.

Description

Technical field [0001] The invention belongs to the field of switching power converters, and particularly relates to a method for suppressing resonance of a fourth-order Boost converter, which is used for a DC-DC converter with an LC input filter. Background technique [0002] Against the background of increasingly scarce fossil energy, due to the many advantages of electric energy in terms of cleanliness, safety, transportation and control, electric energy will occupy an important position in the future energy system. In modern power conversion technology, an LC input filter is often added to the DC-DC front stage to eliminate electromagnetic interference (EMI) and switching harmonics of the input current. The input filter can also protect the converter and its load at a given voltage instant. Protect from impact and damage. But a new problem arises. The input filter increases the order of the system, changes the dynamic characteristics of the converter, and the transient respo...

Claims

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Application Information

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IPC IPC(8): H02M3/08
CPCH02M3/08
Inventor 皇甫宜耿庞圣钊郭亮
Owner NANJING GONGCHENG RES INST OF ENERGY CONSERVATION & NEW MATERIALS TECH CO LTD
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