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Dissertation Template for Master Degree of Engineering in Study on Invters Parallel Operation

Author: WuJianQun
Tutor: HuangChengJun;LiuPing
School: Shanghai Jiaotong University
Course: Electrical Engineering
Keywords: inverter parallel load sharing phase lock
CLC: TM464
Type: Master's thesis
Year: 2008
Downloads: 73
Quote: 0
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Abstract


Nowadays, because the apply of more and more Electric Equipments especially the important facilities, the power supply’s quality and reliability requirements are getting higher and higher. UPS and inverters application are getting more and more widely. The parallel application of inverters is a effective method to improve system reliability and expand system capacity. Now not only the single module characteristics such as dynamic characteristics, output harmonic becoming more demanding, but also a request is also made on the modules parallel performance. The paper mainly proposed research on the following work:Firstly, instruct the inverter hardware structure, and focus on the main circuit topology of DC / DC part and the inverter. The mathematical model is also builded up of the full-bridge DC / DC boost circuit and the inverter. MATLAB is used to analysis the open-loop characteristics of each model, and the control compensation method is proposed, together with the analyzing on stability. Secondly, a mathematical model of parallel modules is established on the basis of the first step. Analysis shows multi parallel modules has the same characters. So the main search focuse on the parallel of two modules. Load sharing between the parallel moudules is analized in this paper. Based on the analysis, the experiment of two modules paralleling is done. And this paper explains two important aspects in paralleling inverters: PLL and power calculation.At last, this paper includes results from an experimental prototype to show the validity of this approach.

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CLC: > Industrial Technology > Electrotechnical > Transformers, converters and reactors > Converter > Inverter
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