750-kW interleaved buck converter dc supply control implementation in a low-cost FPGA

Abstract

The digital control of a 750-kW dc supply that converts a 480-V three-phase ac input voltage to an adjustable dc output voltage which has the maximum voltage value of 600 V is presented in this paper. Digital control is important for achieving precise data acquisition and proper operation of power electronic equipment. In addition to power semiconductor switching signals, several fault and warning signals from the power converter must be considered. Providing sufficient inputs/outputs (I/Os) and high-speed parallel processing, the fieldprogrammable gate array (FPGA) is one of the best candidates to accomplish the tasks mentioned above. In the proposed FPGA application, all functions including analog-to-digital conversion (ADC), power electronic converter algorithms, data interface, and protection logic for the dc supply are implemented in one single cheap FPGA which operates at a 25 MHz clock. All programming of the FPGA is completed by manual coding of hardware description language -the Very high speed integrated circuit Hardware Description Language (VHDL). A small-scale prototype is built and tested to provide further verification of the VHDL code prior to final implementation of the 750-kW prototype. The validity of control algorithms and FPGA functions are verified by simulations using Matlab/Simulink TM Xilinx ISE TM , respectively, prior to implementation in the hardware prototype. Keywords-interleaved dc converter; field-programmable gate array (FPGA); high powerThis project is supported by NSF I/UCRC GRid-connected Advanced Power Electronic Systems (GRAPES).

The National Center for Reliable Electric Power Transmission Test Facility

“…The H2G hosts the UCB which serves as the main control of the supply and allows remote control using NI's LabVIEW control software. Currently, this drive is configured to supply NCREPT's larger 1.5 kV dc-dc converter but can be reconfigured to run the dynamometer and supply student projects [14]. This supply is shown in Fig.…”

Estação de Carregamento Rápido com Elemento Armazenador de Energia e Filtro Ativo de Harmônicos para Veículos Elétricos

“…A conversão CC-CC pode ser realizada por conversores interleaved, os quais apresentam vantagens quando utilizados para potências elevadas, entre elas reduzidas ondulações da corrente de entrada e da tensão de saída, reduzido tamanho dos componentes passivos e alta eficiência em comparação com outras topologias [13], [16], [18], [21]. Em [23] a topologia boost-interleaved é implementada em 750 kW.…”

A novel transient rotor current control scheme of a doubly-fed induction generator equipped with superconducting magnetic energy storage for voltage and frequency support

“…[1][2][3] As one of the most promising approaches to solving the energy crisis, wind power harnessing techniques have been under extensive study in this century. [4][5][6][7][8][9][10] For many wind farms, doublyfed induction generator (DFIG) based wind turbines are used. However, DFIG is very sensitive to grid disturbances, especially those causing a sudden drop of the DFIG terminal voltage.…”