Performance Analysis of SRF PLL Type-3 with Dynamic Feed Forward Frequency Estimator for Abnormal Grid Conditions

  • Seema Agrawal Rajasthan Technical University Kota
  • Mahendra Kumar Indian Institute of Technology Roorkee
  • D K Palwalia RTU Kota

Abstract

A phase-locked loop (PLL) is a closed-loop feedback control device that synchronizes its output signal with an input signal both in frequency and in time. This paper presents a robust method for tracking against adverse conditions of the fundamental sequence component of utility voltage. The proposed phase-locked loop (PLL) is a hybrid configuration of the phase-locked loop type-3 (SRF type-3) synchronous reference frame coupled with a feed-forward frequency estimator using a selective harmonic filtering technique. An SRF type -2 based PLL has a secondary closed path. Under the ramp frequency transition, it has a steady-state step and a frequency error. In the proposed PLL, the constant gain loop filter is used to eliminate the phase and frequency error. Feed-forward operation with selective harmonic pre-filtering allows fast-tracking with a low tracking error of the reference signal. From the results it is evident that the proposed PLL achieves a high bandwidth and quick dynamic response without endangering the stability and filtering capability. The proposed system has been tested through MATLABĀ® Simulink platform under abnormal conditions.
Published
2021-04-09
How to Cite
AGRAWAL, Seema; KUMAR, Mahendra; PALWALIA, D K. Performance Analysis of SRF PLL Type-3 with Dynamic Feed Forward Frequency Estimator for Abnormal Grid Conditions. Journal of Power Technologies, [S.l.], v. 101, n. 2, p. 87-95, apr. 2021. ISSN 2083-4195. Available at: <https://papers.itc.pw.edu.pl/index.php/JPT/article/view/1739>. Date accessed: 01 aug. 2021.
Section
Electrical Engineering

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