Conventional Synchronous Reference Frame Phase-Locked Loop Is An Adaptive Complex Filter

Saeed Golestan, Josep M. Guerrero

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Despite the wide acceptance and use of the conventional synchronous reference frame phase-locked loop (SRFPLL) no transfer function describing its actual input-output relationship has been developed so far. Arguably, the absence of
such transfer function has hampered the application of SRF-PLL as a filter or controller inside the closed-loop control systems. In this letter, the transfer function describing the actual inputoutput relationship of the conventional SRF-PLL is presented. Using this transfer function, it is shown that the conventional SRF-PLL is a first-order adaptive complex bandpass filter. It is also shown that this transfer function can be useful for tuning of SRF-PLL parameters. The accuracy of this transfer function is confirmed through numerical results.
TidsskriftI E E E Transactions on Industrial Electronics
Udgave nummer3
Sider (fra-til)1679-1682
Antal sider4
StatusUdgivet - mar. 2015

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