Title :
Power quality controller based on hybrid modular multilevel converter
Author :
Yang, Xiaofeng ; Zheng, Trillion Q. ; Lin, Zhiqin ; Xiong, Tao ; You, Xiaojie
Author_Institution :
Sch. of Electr. Eng., Beijing Jiaotong Univ., Beijing, China
Abstract :
This paper presents a hybrid modular multilevel converter (HMMC) based power quality controller (HM-PQC) intended for medium- or high-voltage applications. HM-PQC is characterized by cascaded connection of leg inductors and power units. Modular structure makes it easily be extended to high-level, thus leading to low voltage steps and low generation of EMI problems, etc.. Comparing with the conventional star-connected cascaded H-bridge converter, HM-PQC can be controlled for improving various power quality problems in three-phase balanced or unbalanced power systems. The circuit configuration and operation principles of HMMC were presented in detail. Moreover, power quality control strategies of HM-PQC were proposed for different compensation purpose. Experimental results show that HM-PQC is suitable for comprehensive mitigating of all the power quality problems, such as reactive power compensation, harmonic suppression and negative-sequence balancing.
Keywords :
compensation; harmonics suppression; power convertors; power supply quality; power system control; reactive power; EMI problems; HM-PQC; HMMC; circuit configuration; harmonic suppression; high-voltage applications; hybrid modular multilevel converter; leg inductors; low generation; low voltage steps; medium-voltage applications; modular structure; negative-sequence balancing; operation principles; power quality control strategies; power units; reactive power compensation; star-connected cascaded H-bridge converter; three-phase balanced power systems; three-phase unbalanced power systems; Capacitors; Hidden Markov models; Inductors; Power quality; Reactive power; Switches; Voltage control; circulating current; hybrid modular multilevel converter; negative-sequence; power quality controller;
Conference_Titel :
Industrial Electronics (ISIE), 2012 IEEE International Symposium on
Conference_Location :
Hangzhou
Print_ISBN :
978-1-4673-0159-6
Electronic_ISBN :
2163-5137
DOI :
10.1109/ISIE.2012.6237399