A control scheme of current-source PWM rectifier under unbalanced supply conditions

作者：Li Heming^*; Zhu Xiaorong; Shi Xinchun; Peng Yonglong

来源：Transactions of China Electrotechnical Society, 2010, 25(7): 85-92.

• AC-side
• Calculation scheme
• Control schemes
• Correction schemes
• Current controller
• Current tracking
• Current-source PWM rectifier
• Dc current
• Even-harmonic
• Input current
• Instantaneous active power
• Instantaneous power
• Odd harmonics
• Power factors
• Simulation result
• Sinusoidal input
• Stationary frame
• Three-phase currents
• Unbalanced
• Unbalanced input voltage

Under unbalanced supply conditions, when the three-phase current-source rectifier (CSR) is used with the normal controllers, unbalanced input voltages cause abnormal even harmonics at the DC output and odd harmonics in the input currents, which worsen the performance of the CSR. In this paper, instantaneous active power balance equations at CSR AC side are deduced firstly, and then a new current-conference calculation scheme of three-phase CSR under unbalanced supply conditions is proposed, which can not only eliminate the harmonics in the DC current, but also achieve sinusoidal input current and controllable power factor. Furthermore, a novel current controller based on sliding-mode control in stationary frame is proposed, which achieves high performance current tracking. The effectiveness of the proposed unbalanced correction scheme and the current controller are validated through simulation results.

• 出版日期2010
• 单位华北电力大学