NDLI: Research on DC voltage balancing control method of star connection cascaded H-bridge static var generator

Content Provider	IET Digital Library
Author	He, Yingjie Duan, Wenyan Fu, Yabin
Abstract	In-depth study of the DC side voltage control of the star connection cascaded H-bridge multilevel static var generator has been made in this study. Moreover, a three-layer DC side voltage control system has been established. The first layer is overall DC side voltage control. The overall DC side voltage of three phases A, B and C is maintained constant through generating fundamental positive sequence active current. The second layer is balancing control between three phases. Through injecting zero sequence voltage into the voltage command, the authors can redistribute three-phase active power, in order to maintain three-phase DC side voltages balanced; in this method, fast dynamic control can be achieved through feeding forward the power that grid voltage and converter current produce. The third layer is balancing control between modules of each phase. Through adjusting voltage commands of H-bridge modules of each phase along the direction of the converter current, they can redistribute the active power absorbed by each module, in order to ensure that DC side voltages of modules of each phase are equal to each other. Experimental results verify the correctness and reliability of the proposed control system in the end.
Starting Page	1505
Ending Page	1512
Page Count	8
ISSN	17554535
Volume Number	9
e-ISSN	17554543
Issue Number	Issue 7, Jun (2016)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-pel/9/7
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-pel.2015.0276
Journal	IET Power Electronics
Publisher Date	2016-06-08
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Control of Electric Power System DC Side Voltage Control DC Voltage Balancing Control Method Power Converter Power Electronics Power Supply Star Connection Cascaded H-bridge Static Var Generator Static VAr Compensators Supervisory Circuit Three-layer DC Side Voltage Control System Voltage Control Zero Sequence Voltage
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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