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Instabilities due to mutual interactions between inverters and grid impedance are observed sometimes. This paper proposes a new stabilization method, which improves the output frequency impedance characteristics, satisfying the Nyquist stability criterion. The principle is that the output impedance is designed to be passive with the feedfoward loop characteristics and the system is stable even for...
Instabilities due to mutual interactions among inverters in a grid system are sometimes observed. This paper proposes a stabilization method which adds feed-forward (FF) loop characteristics to improve output frequency impedance characteristics which satisfy the Nyquist stability criterion. The principle is that the output impedance is compulsively made passive with the FF loop characteristics and...
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