A novel combined approach to voltage sag ride-through and current waveform improvement for adjustable-speed drives

被引：0
|
作者：
Xu, JH [1 ]
Al-Haddad, K [1 ]
Sicard, P [1 ]
Rajagopalan, V [1 ]
机构：
[1] Univ Quebec Trois Rivieres, Chaire Rech Hydro Quebec, Trois Rivieres, PQ G9A 5H7, Canada
来源：
PESC 2001: 32ND ANNUAL POWER ELECTRONICS SPECIALISTS CONFERENCE, VOLS 1-4, CONFERENCE PROCEEDINGS | 2001年
关键词：
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A combined sub-circuit with voltage compensation and harmonic modulation is proposed to improve the voltage sag ride-through capability of adjustable-speed drives (ASD) with improved ac mains current waveform. The voltage compensation and harmonic modulation circuits share the same Y-0/Delta connected interface transformer. The harmonic modulation module injects a calculated amount of third harmonic current through the neutral at the primary side of the interface transformer and improves line current waveform. Upon detection of a voltage sag, the voltage compensation rectifier, supplied from the secondary of the interface transformer, outputs a controlled dc voltage in series with the reduced main rectifier's output and thus keeps the dc-bus voltage at the desired level. Operating principle of the combined sub-circuit is presented. The theoretical analysis is verified by simulation using SABER and PSIM software. Some experimental results on a 12.5 kW prototype converter with third harmonic modulation are presented.
引用
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页码：1315 / 1320
页数：6
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