Earticle

초록

영어

Due to the line impedance impact on islanded low-voltage microgrids, traditional droop control cannot guarantee the proper power sharing between distributed generation (DG) units. In the meanwhile, droop control would cause voltage and frequency deviation, which will influence the power quality of customers. This paper proposed an enhanced droop control scheme with autonomous frequency restoration control. Reactive power sharing problem is solved by adding a redesigned virtual impedance and voltage compensation loop, which ensures PCC voltage in nominal range. To the problem of frequency deviation, autonomous frequency restoration loop is added. Small signal model of frequency control is established to analyze the stability. In circumstance of frequent load switching, the frequency can properly restore to nominal value, with smooth and stable transient process. The simulation results demonstrate the effectiveness of the proposed control strategy.

목차

Abstract
 1. Introduction
 2. Microgrid Conventional Droop Control
 3. Enhanced Droop Control Scheme
  3.1. Virtual Impedance Control
  3.2. Voltage Compensation and Reactive Power Sharing
  3.3. Frequency Autonomous Control
 4. Simulation Result
 Acknowledgements
 References

키워드

저자

• Lianqing Zheng [ State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing, China ]
• Chen Zhuang [ State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing, China ]
• Jian Zhang [ State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing, China ]
• Xiong Du [ State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing, China ]

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  International Journal of Control and Automation

• 간기

  월간

• pISSN

  2005-4297

• 수록기간

  2008~2016

• 십진분류

  KDC 505 DDC 605