Improvement of Transient State Response through Feedforward Compensation Method of AC/DC Power Conversion System (PCS) Based on Space Vector Pulse Width Modulation (SVPWM)

• Main Authors: Seok-Jin Hong, Seung-Wook Hyun, Kyung-Min Kang, Jung-Hyo Lee, Chung-Yuen Won
• Format: Article
• Language: English
• Published: MDPI AG 2018-06-01
• Series: Energies
• Subjects: feedforward compensation; space vector pulse width modulation (SVPWM); robust DC grid; DC distribution; transient state response; improved response
• Online Access: http://www.mdpi.com/1996-1073/11/6/1468

In a DC distribution system configured by AC/DC power conversion system (PCS), the voltage control performance of the AC/DC PCS determines the stability and reliability of the DC distribution grid. The DC voltage of grid is maintained by capacitor, thus transient voltage is an inevitable problem when a grid is connected with a high amount of load or renewable energy. Space vector pulse width modulation (SVPWM) is well known as a stable modulation method and is used in AC/DC PCS and many types of topologies, but a solution for the transient states issue of DC link has not clearly been studied. In this paper, a feedforward compensation method based on the mathematical model of SVPWM is proposed to solve the transient state problem in a DC distribution system. The proposed method is verified by simulation and experiment. AC/DC PCS with the proposed feedforward compensation method has more robust DC voltage control characteristics.