Graph-Theory-Based Derivation, Modeling and Control of Power Converter Systems

2022 ◽  
pp. 1-1
Author(s):  
Yuzhuo Li ◽  
Johannes Kuprat ◽  
Yunwei Li ◽  
Marco Liserre
Keyword(s):  
Graph Theory ◽  
Power Converter ◽  
Modeling And Control ◽  
And Control

A Highly Efficient and Reliable Power Scheme Using Improved Push-Pull Forward Converter for Heavy-Duty Train Applications

2016 ◽  
Vol 20 (2) ◽  
pp. 342-354 ◽  
Author(s):  
Liran Li ◽  
◽  
Zhiwu Huang ◽  
Heng Li ◽  
Xiaohui Qu ◽  
...  
Keyword(s):  
Low Voltage ◽  
Power Converter ◽  
Design Guidelines ◽  
Heavy Duty ◽  
Wheel Wear ◽  
Brake Shoe ◽  
Modeling And Control ◽  
Forward Converter ◽  
High Impedance ◽  
And Control

Electronically controlled pneumatic (ECP) brake systems have become popular in heavy-duty train applications because of their advantages, which include shorter stopping distances, improved handling, and less brake-shoe and wheel wear. In ECP brake systems, an improved power supply is required to support efficient and reliable operations. In this paper, we propose a new power converter for ECP brake systems, which is derived from a conventional push-pull converter. As opposed to conventional push-pull converters, we insert a clamping capacitor into the proposed circuit. This clamping capacitor simultaneously enables a greater number of operation modes for the proposed converter and absorbs the voltage spikes in the switch. The proposed converter is more suited for ECP brake applications that require high power, low voltage ripple, and high impedance. We theoretically analyze the proposed converter, and present the design guidelines. Further, we discuss the modeling and control aspects. We demonstrate the operations of the proposed model by performing both simulations and experiments.

Modeling and Control For a Type-4 Wind Generator Based on AC/AC Power Converter

2019 ◽  
Author(s):  
R. Farias Miranda ◽  
D. Ruiz Robles ◽  
V. Venegas Rebollar ◽  
E. L. Moreno Goytia ◽  
N. M. Salgado Herrera ◽  
...  
Keyword(s):  
Power Converter ◽  
Modeling And Control ◽  
Wind Generator ◽  
Ac Power ◽  
And Control

Graph-Theory-Based Modeling and Control for System-Level Optimization of Smart Transformers

2020 ◽  
Vol 67 (10) ◽  
pp. 8910-8920
Author(s):  
Marco Liserre ◽  
Vivek Raveendran ◽  
Markus Andresen
Keyword(s):  
Graph Theory ◽  
System Level ◽  
Modeling And Control ◽  
And Control

scholarly journals Selection and Validation of Mathematical Models of Power Converters using Rapid Modeling and Control Prototyping Methods

2018 ◽  
Vol 8 (3) ◽  
pp. 1551 ◽  
Author(s):  
Fredy Edimer Hoyos ◽  
John Edwin Candelo ◽  
John Alexander Taborda
Keyword(s):  
Power Converters ◽  
Experimental Tests ◽  
Power Converter ◽  
Buck Converter ◽  
Experimental Results ◽  
Mathematical Representation ◽  
Modeling And Control ◽  
Rapid Control Prototyping ◽  
The Stability ◽  
And Control

This paper presents a methodology based on two interrelated rapid prototyping processes in order to find the best correspondence between theoretical, simulated, and experimental results of a power converter controlled by a digital PWM. The method supplements rapid control prototyping (RCP) with effective math tools to quickly select and validate models of a controlled system. We show stability analysis of the classical and two modified buck converter models controlled by zero average dynamics (ZAD) and fixed-point induction control (FPIC). The methodology consists of obtaining the mathematical representation of power converters with the controllers and the Lyapunov Exponents (LEs). Besides, the theoretical results are compared with the simulated and experimental results by means of one- and two-parameter bifurcation diagrams. The responses of the three models are compared by changing the parameter K_s of the ZAD and the parameter N of the FPIC. The results show that the stability zones, periodic orbits, periodic bands, and chaos are obtained for the three models, finding more similarities between theoretical, simulated, and experimental tests with the third model of the buck converter with ZAD and FPIC as it considers more parameters related to the losses in different elements of the system. Additionally, the intervals of the chaos are obtained by using the LEs and validated by numerical and experimental tests

scholarly journals Unified Graph Theory-Based Modeling and Control Methodology of Lattice Converters

Electronics ◽  
2021 ◽  
Vol 10 (17) ◽  
pp. 2146
Author(s):  
Jingyang Fang
Keyword(s):  
Graph Theory ◽  
Performance Optimization ◽  
Modeling And Control ◽  
Unified Modeling ◽  
Large Current ◽  
Dynamic Voltage ◽  
Converter Topologies ◽  
And Performance ◽  
And Control ◽  
Control Methodology

Lattice converters combine the merits of both cascaded-bridge converters and multi-paralleled converters, leading to infinitely large current and voltage capabilities with modularity and scalability as well as small passive components. However, lattice converters suffer from complexity, which poses a serious threat to their widespread adoption. By use of graph theory, this article proposes a unified modeling and control methodology for various lattice converters, resulting in the satisfaction of their key control objectives, including selected inputs/outputs, desired voltages, current sharing, dynamic voltage balancing, and performance optimization. In addition, this article proposes a plurality of novel lattice converter topologies, which complement state-of-the-art options. Simulation and experimental results verify the effectiveness and superiority of the proposed methodology and lattice converters.

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