Improved PLL structures for single-phase grid inverters
作者： Frede Blaabjerg , Remus Teodorescu , Mihai Ciobotaru
DOI:
关键词: Power (physics) 、 Control theory 、 PLL multibit 、 Voltage 、 Distributed generation 、 Phase-locked loop 、 Electronic engineering 、 Computer science 、 Harmonics 、 Grid 、 Transformation (function)
摘要: Phase, amplitude and frequency of the utility grid are critical information for operation grid-connected power conditioning equipments. In such applications, an accurate fast detection phase angle voltage is essential to assure a correct generation reference signals. This paper presents two improved phase-locked-loop (PLL) methods single-phase connected systems. The investigated PLL based on transport delay method inverse Park transformation method. improvements in case using delay-based are: non-frequency dependent better filtering harmonics. For other improvement consists Experimental results validate effectiveness proposed methods. Index Terms — Phase-Locked-Loop (PLL), distributed system, converter.
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