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Your search keyword '"Kong, Jiansheng"' showing total 9 results
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9 results on '"Kong, Jiansheng"'

1. A triple‐LC‐based DC/DC converter with wide input voltage gain in both under‐resonance and over‐resonance frequency regions.

Author

Ren, Chunguang, Qin, Yue, Kong, Jiansheng, Li, Xinqi, Hui, Yue, Han, Xiaoqing, and He, Xiangning

Subjects
ELECTRIC vehicle charging stations, VOLTAGE, RESONANCE, TELECOMMUNICATION
Abstract

In recent years, wide voltage range DC/DC converters have been widely used in telecom power, solar generation and electric vehicle charger applications. Based on this, a new multi‐resonant converter with wide input voltage is proposed here. Compared with the traditional LLC converter, the proposed converter can maintain the output voltage within a narrow frequency regulation range in both under‐resonance and over‐resonance areas. Thus, a wide voltage range can be realized without additional switch components or complex control strategies. The topology and the corresponding working principle of the proposed converter are introduced. In addition, the equivalent model by considering the fundamental wave is established and the influence of the resonance parameters on the voltage gain characteristic is analysed in detail. With these considerations, the resonance parameters are designed. Finally, a 500 W experiment platform is established to verify the effectiveness and feasibility of the proposed converter. [ABSTRACT FROM AUTHOR]

Published
2024
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8. Analysis of Interaction Among Multiple Parallel Three-phase Grid-connected Inverters Based on RGA

Author

Kong Jiansheng, Baifu Zhang, Xiaoqing Han, Chaoyang Li, Chunguang Ren, and Wang Yihe

Subjects
Computer science, business.industry, 020208 electrical & electronic engineering, Automatic frequency control, 02 engineering and technology, Grid, Topology, Transfer function, Three-phase, Control system, Distributed generation, 0202 electrical engineering, electronic engineering, information engineering, Inverter, Voltage droop, business
Abstract

As the main interface device between distributed generation and public grid, grid connected inverter is responsible for the stable operation of distributed generation system. In order to solve the problem of interaction among inverters in the parallel system of inverters, based on the double closed-loop PR control system of LCL filter, a multiple three-phase inverter grid system which is close to the reality with relatively complex control structure based on droop control is established. For the current control loop with additional active damping control in the system, a transfer function is established at αβcoordinate system. According to the principle of relative gain array, a method is proposed to analyze the interaction among multiple parallel three-phase inverters. It can quantitatively analyze the relationship between the system control parameters, operation frequency, number of parallel inverters, filter capacitor and the interaction among inverters. Finally, a grid connected model of three-phase inverter is built in MATLAB / Simulink simulation platform to verify the correctness of theoretical analysis and the effectiveness of interaction analysis method.

Published
2020

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