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A Method of Suppressing the Resonance of 4th Order Boost Converter

A converter and resonance technology, 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, suppressing resonance phenomena, and enhancing stable performance.

Active Publication Date: 2018-07-31
NANJING GONGCHENG RES INST OF ENERGY CONSERVATION & NEW MATERIALS TECH CO LTD
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  • Abstract
  • Description
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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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  • A Method of Suppressing the Resonance of 4th Order Boost Converter
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  • A Method of Suppressing the Resonance of 4th Order Boost Converter

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Embodiment Construction

[0036] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:

[0037] This embodiment will give the specific content of this resonance suppression method based on the specific method and steps of the present invention and on the basis of real data. And the feasibility and effectiveness of this method are proved by theoretical analysis and simulation experiment results.

[0038] 1. System Modeling

[0039] The system structure targeted by the present invention is as 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 supply is composed of an AC power supply and a rectifier. The AC power supply can be the rear stage of the aircraft's three-stage power generation system, a wind turbine, an AC microgrid, etc. In order to simplify the analysis, the main power supply is equivalent to a constant voltage DC power supply. The DC-DC converter adopts ...

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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 in particular relates to a method for suppressing the resonance of a fourth-order Boost converter, which is used for a DC-DC converter with an LC input filter. Background technique [0002] In the context of increasingly scarce fossil energy, electric energy will occupy an important position in the future energy system due to its many advantages in cleanliness, safety, transportation and control. In modern power conversion technology, an LC input filter is often added in 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 Protected from damage by impact. However, a new problem arises. The input filter increases the order of the system, changes the dynamic characteristics of the converter, and the transient response of the system also...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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