초록

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Abstract ▼ AI-Helper

This paper deals with the implementation of three-phase VSI systems which can control the power regenerated from DC bus line to AC supply. The overall system consists of the line-to-line voltage and line current sensors, an actual power calculator using d-q transformation method, a complex power con...

This paper deals with the implementation of three-phase VSI systems which can control the power regenerated from DC bus line to AC supply. The overall system consists of the line-to-line voltage and line current sensors, an actual power calculator using d-q transformation method, a complex power controller with PI control scheme, a gating signal generator for modified a-conduction mode, a DPLL for frequency followup, and power circuits. Control board is constructed by using a 32-bit DSP TMS320C32, two EPLDs, six ADCs, and a DAC To verify the performance of the proposed system, we designed and constructed the propotype with the power rating of 5kVA at AC 220V. Experimental results show that the regenerated active power is well controlled to its command value and the regenerated reactive power still remained at nearly zero through all operating modes