Earticle

초록

영어

In this paper, we focus on the need for enhance the adaptive capability of the voltage source converter (VSC) under unbalanced grid voltage conditions. A new direct power control (DPC) design strategy for VSC under unbalanced grid voltage conditions is proposed. Based on the analysis of power characteristics of a full rated converter, fluctuation mechanism on DC bus voltage of converter are studied, and the mathematic model of the grid side VSC under synchronous reference frame is built. To implement three different control target of constant DC bus voltage and power, or sinusoidal balanced line current, the proportional integral resonant (PIR) regulator is integrated with the traditional DPC to eliminate the ripple of the DC bus voltage and power. The proposed control strategy possesses such advantages without positive and negative sequence decomposition. Finally, the simulations works is developed to validate the proposed method. The simulation results show that the new DPC integrated with PIR can good elimination of the DC bus voltage ripples and power oscillation, enhance the ride through capability of the directly driven with permanent magnet synchronous generator system under unbalanced grid faults conditions, and can provide fast dynamic response.

목차

Abstract
 1. Introduction
 2. Power Characteristics of the VSC under Unbalanced Grid Condition
 3. DPC Design Based Proportional Integral Resonant Controller
  3.1. Controller Design
  3.2. An Improved DPC Control Strategy Design
 4. Crowbar Circuit with Super Capacitor
 5. Simulation Results and Discussion
 6. Conclusion
 References

키워드

저자

• Xiaojuan Sun [ School of Electronic Information Engineering, Xi’ an Technological University, China ]
• Quanmin Guo [ School of Electronic Information Engineering, Xi’ an Technological University, 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