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A method for calculating the resonance parameters of an llc system in an AC/DC hybrid distribution network

A technology of AC/DC mixing and resonance parameters, applied in the direction of DC network circuit devices, control/regulation systems, DC power input conversion to DC power output, etc.

Active Publication Date: 2021-03-16
成都拓及兴通科技有限公司
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for calculating the resonance parameters of the LLC system of the AC-DC hybrid distribution network, which can effectively solve the technical problem of calculating the accuracy of the equivalent model of the LLC system by parasitic parameters in the system

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  • A method for calculating the resonance parameters of an llc system in an AC/DC hybrid distribution network
  • A method for calculating the resonance parameters of an llc system in an AC/DC hybrid distribution network
  • A method for calculating the resonance parameters of an llc system in an AC/DC hybrid distribution network

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Embodiment Construction

[0048] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0049] The structure of the LLC system of a kind of AC-DC hybrid power distribution system of the present invention, such as figure 1 As shown, it includes an LLC system composed of a nonlinear power load, multiple LLC modules connected in parallel and its control circuit; the nonlinear power load uses a lead battery energy storage device, and through the switch K 0 、K 1 and resistor R 0 Realize soft start protection; the high voltage side of the LLC module adopts a fully controlled rectifier bridge based on a power switch, and the high voltage side is connected to a capacitor C in To achieve voltage stabilization, the resonant circuit uses a resonant capacitor C 1 -C n , Resonant inductance L 1 -L n , Exciting inductance L m1 -L mn , medium and high frequency transformer MFT, the low-voltage side adopts a symmetrical fully-controlled...

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Abstract

The invention discloses a method for calculating resonance parameters of an LLC system of an AC-DC hybrid distribution network, which belongs to the technical field of power distribution control. The high-voltage side of the multiple LLC parallel modules adopts a fully-controlled rectifier bridge, the high-voltage side is connected to a capacitor Cin to realize voltage stabilization, and the low-voltage side adopts a symmetrical fully-controlled inverter bridge. The LLC control circuit includes an LLC module and a nonlinear power supply load connected Voltage and current sensors, the input terminal of the voltage sensor is connected to the power supply side of the DC bus on the high-voltage side, and the output terminal is connected to the main control CPU through a digital-to-analog converter and a detection circuit; the input terminals of the current sensor are respectively connected to the DC bus on the high-voltage side, the low-voltage The non-linear power supply load on the side is connected to the resonant inductance on the high voltage side, and the output side is connected to the main control CPU through a digital-to-analog converter and a detection circuit, and the main control CPU is connected to the driving circuit. Using the method of accurately calculating the resonance parameters of the LLC system, an accurate circuit equivalent model is constructed; the solution space and the initial solution of the resonance parameters are determined.

Description

technical field [0001] The invention belongs to the technical field of power distribution control. Background technique [0002] In recent years, the technological upgrading of my country's railway system has raised new demands. The railway power distribution system is the power supply for loads other than traction along the railway line. The traditional railway power distribution system obtains power through an external 35kV or 10kV power system. There is a certain impact on power quality. On this basis, the new railway intelligent power distribution system adds an AC-DC hybrid power system. As a high-efficiency direct-to-direct conversion device, the LLC converter can realize the power conversion between the DC bus in the system and the high-power energy storage power supply, and has gradually become an engineering project. A hot program that is competing for research in the field. Therefore, in-depth research on the structure and implementation of LLC has certain posit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/36H02M3/335H02J1/00
CPCH02J5/00H02M1/36H02M3/33523H02M3/33576Y02B70/10
Inventor 何晓琼韩鹏程曾理龚子赵智钦舒泽亮
Owner 成都拓及兴通科技有限公司
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