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http://dx.doi.org/10.6113/JPE.2017.17.2.389

Load Disturbance Compensation for Stand-alone Inverters Using an Inductor Current Observer  

Choe, Jung-Muk (Future Energy Electronics Center, Virginia Tech)
Moon, Seungryul (Future Energy Electronics Center, Virginia Tech)
Byen, Byeng-Joo (Department of Electrical Engineering, Konkuk University)
Lai, Jih-Sheng (Future Energy Electronics Center, Virginia Tech)
Lim, Young-Bae (Korea Electrical Safety Corporation)
Choe, Gyu-Ha (Department of Electrical Engineering, Konkuk University)
Publication Information
Journal of Power Electronics / v.17, no.2, 2017 , pp. 389-397 More about this Journal
Abstract
A control scheme for stand-alone inverters that utilizes an inductor current observer (ICO) is proposed. The proposed method measures disturbance load currents using a current sensor and it estimates the inductor current using the ICO. The filter parameter mismatch effect is analyzed to confirm the ICO's controllability. The ICO and controllers are designed in a continuous-time domain and transferred to a discrete-time domain with a digital delay. Experimental results demonstrate the effectiveness of the ICO using a 5-kVA single-phase stand-alone inverter prototype. The experimental results demonstrate that the observed current matches the actual current and that the proposed method can archive a less than 2.4% total harmonic distortion (THD) sinusoidal output waveform under nonlinear load conditions.
Keywords
Inductor current observer; Isolated grid; Load disturbance compensation; Single-phase inverter; Stand-alone inverter;
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Times Cited By KSCI : 1  (Citation Analysis)
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