Earticle

초록

영어

With the continuous expansion of the scale of distributed power generation，multi grid connected converters often prone to oscillation problems when parallel operation.In this paper,we study the equivalent circuit of parallel connection of multi grid connected converters , system response characteristics of voltage source and in-depth analysis of the causes of the parallel oscillation of the converters.This paper analyzes converter’s parallel complex vector model by complex vector and comes to a conclusion that power grid voltage feed-forward will produce strong coupling between converter so that cause oscillation parallel converters. In view of the above problems and the flow of the converter starting or the voltage fluctuation of the grid, we design a low feed forward method, that is to make the fundamental and the main sub components of the grid voltage forward without delay and for the relative high frequency components, the filter technology is used to attenuate, so as to achieve the maximum elimination of the feed-forward coupling between the converter, to prevent the occurrence of system oscillation. In order to verify the use of this paper, the theory of the parallel converter is applied in the field of MW level wind field. The experimental results prove the correctness of the theory.

목차

Abstract
 1. Introduction
 2. n-Paralleled Equivalent Model of Grid Connected Converter
 3. Analysis of Converter Parallel Vibration and Complex Vector Model
 4. Complex Vector Analysis of Parallel Oscillation Suppression
 5. Wind Farm Experiments and Conclusions
 References

키워드

저자

• Rui Guo [ Shenyang Institute of Engineering, Shenyang, China ]
• Cunxu Wang [ Shenyang Institute of Engineering, Shenyang, China ]
• Shu Liu [ Shenyang Institute of Engineering, Shenyang, China ]
• Xin Guan [ Shenyang Institute of Engineering, Shenyang, China ]
• Wei Gao [ Shenyang Institute of Engineering, Shenyang, China ]
• Shuaijie Wang [ Shenyang Institute of Engineering, Shenyang, China ]
• Chuan Chen [ Jinzhou Power Supply Branch, State Grid Liaoning Electric Power Supply Co. Ltd, Jinzhou, China ]

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  International Journal of Grid and Distributed Computing

• 간기

  격월간

• pISSN

  2005-4262

• 수록기간

  2008~2016

• 십진분류

  KDC 505 DDC 605