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A Novel Control Scheme for T-Type Three-Level SSG Converters Using Adaptive PR Controller with a Variable Frequency Resonant PLL
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  • Journal title : Journal of Power Electronics
  • Volume 16, Issue 3,  2016, pp.1176-1189
  • Publisher : The Korean Institute of Power Electronics
  • DOI : 10.6113/JPE.2016.16.3.1176
 Title & Authors
A Novel Control Scheme for T-Type Three-Level SSG Converters Using Adaptive PR Controller with a Variable Frequency Resonant PLL
Lin, Zhenjun; Huang, Shenghua; Wan, Shanming;
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 Abstract
In this paper, a novel quasi-direct power control (Q-DPC) scheme based on a resonant frequency adaptive proportional-resonant (PR) current controller with a variable frequency resonant phase locked loop (RPLL) is proposed, which can achieve a fast power response with a unity power factor. It can also adapt to variations of the generator frequency in T-type Three-level shaft synchronous generator (SSG) converters. The PR controller under the static α-β frame is designed to track ac signals and to avert the strong cross coupling under the rotating d-q frame. The fundamental frequency can be precisely acquired by a RPLL from the generator terminal voltage which is distorted by harmonics. Thus, the resonant frequency of the PR controller can be confirmed exactly with optimized performance. Based on an instantaneous power balance, the load power feed-forward is added to the power command to improve the anti-disturbance performance of the dc-link. Simulations based on MATLAB/Simulink and experimental results obtained from a 75kW prototype validate the correctness and effectiveness of the proposed control scheme.
 Keywords
Proportional-resonant control;Quasi direct power control;Resonant phase locked loop;Shaft synchronous generator;T-type there-level converter;
 Language
English
 Cited by
1.
Adaptive resonant based multi-loop control strategy for parallel distributed generation units in standalone microgrid application, Electric Power Systems Research, 2017, 143, 262  crossref(new windwow)
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