Modeling, Control and Experimental Investigation of a Novel DSTATCOM Based on Cascaded H-bridge Multilevel InverterReportar como inadecuado




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Automatika : journal for control, measurement, electronics, computing and communications, Vol.51 No.1 March 2010. -

A novel static synchronous compensator for reactive power compensation of distribution system DSTATCOM is proposed, based on the cascaded H-bridge multilevel inverter configuration. The mathematical formulation of the multilevel DSTATCOM is presented using state-space representations. A new software phase-locked loop SPLL is presented for grid synchronization and the obtained phase angle of the fundamental component of the grid voltage is utilized for deriving the active and reactive power balancing equations of the multilevel DSTATCOM. The proportional-resonant PR controller scheme is adopted for the current tracking control of the inverter, and the average dc-link voltage is controlled using a proportional-integral PI controller to regulate the active power flow of the DSTATCOM. Besides, the voltage balancing VB control among individual H-bridges is achieved by using separate PI regulators to control the difference voltage between the individual dc-link voltage and the average dc-link voltage. The validity of the proposed multilevel DSTATCOM and its control strategies is substantially confirmed by the extensive simulation results and the experimental results from the prototype system.

Multilevel; Cascaded H-bridge; DSTATCOM; Phase-locked loop PLL; Voltage balancing



Autor: Lin Xu - ; Department of Electrical Engineering, Shanghai JiaoTong University, Shanghai, P. R. China Yang Han - ; Department of E

Fuente: http://hrcak.srce.hr/



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