PROJECT TITLE :
Clustered Voltage Balancing Mechanism and its Control Strategy for Star-Connected Cascaded H-Bridge STATCOM - 2017
To explore the clustered voltage balancing mechanism of the star-connected cascaded H-Bridge (SCHB) STATCOM, this paper analyzes the link between the active power and also the control variables-modulation reference voltages in an exceedingly dq frame through positive and negative sequence part decomposition. The derived relationship within the dq frame reveals that the negative sequence modulation reference voltage is capable of redistributing the active power among 3 phases and also the SCHB STATCOM features the clustered voltage self-stabilizing without any extra clustered voltage balancing control. To eliminate the differences of 3 clustered voltages, a brand new clustered voltage balancing management is proposed by regulating negative sequence modulation reference voltage within the dq frame. Its balancing mechanism is analyzed thoroughly and a straightforward implementation is presented additionally. The effectiveness of the proposed management is verified by experimental results on a four hundred V/fifteen kvar SCHB STATCOM.
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