A 2nd Order Harmonic Compensation Method for Wind Power System Using a PR Controller

Title & Authors
A 2nd Order Harmonic Compensation Method for Wind Power System Using a PR Controller
Jeong, Hae-Gwang; Lee, Jong-Hyun; Lee, Kyo-Beum;

Abstract
This paper proposes a compensation method for the $\small{2^{nd}}$-order harmonic of single-phase grid-connected wind power generation systems. Theoretically, a single-phase grid-connected inverter system has no choice but to cause the $\small{2^{nd}}$-order harmonic to DC-link voltage. The reference active current is affected by the DC-link voltage. The output current from the reference active current is distorted by the $\small{1^{st}}$ and $\small{3^{rd}}$-order harmonic. The proposed method can compensate, conveniently, the reference active current with the $\small{2^{nd}}$-order harmonic. To reduce the $\small{2^{nd}}$-order ripple in the reference active current, proposed method takes a PR controller as a feed-forward compensator. PR controllers can implement selective harmonic compensation without excessive computational requirements; the use of these controllers simplifies the method. Both the simulation and experimental results agree well with the theoretical analysis.
Keywords
Single-phase;Grid-connected system;Wind power;Generation system;PR(Proportional Resonant) controller;$\small{2^{nd}}$ order harmonic;
Language
English
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