Journal of Power Electronics

  • 제14권2호
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  • Pages.383-391
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  • 2014
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  • 1598-2092(pISSN)
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  • 2093-4718(eISSN)
전력전자학회 (The Korean Institute of Power Electronics)
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Compensation Strategy to Eliminate the Effect of Current Measurement Offsets in Grid-Connected Inverters

  • Lee, Chang-Hee (Department of Electrical Eng., Kyungpook National University) ;
  • Choi, Jong-Woo (Department of Electrical Eng., Kyungpook National University)
  • 투고 : 2013.05.21
  • 심사 : 2013.12.24
  • 발행 : 2014.03.20
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초록

For the digital control of systems such as grid-connected inverters, measuring inverter output currents accurately is essential. However, current measurement offsets are inevitably generated by current measurement paths and cause DC current components in real inverter output currents. Real inverter output currents with DC components cause the DC-link capacitor voltage to oscillate at the frequency of a utility voltage. For these reasons, current measurement offsets deteriorate the overall system performance. A compensation strategy to eliminate the effect of current measurement offsets in grid-connected inverters is proposed in this study. The validity of the proposed compensation strategy is verified through simulations and experiments. Results show that the proposed compensation strategy improves the performance of grid-connected inverters.

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피인용 문헌

  1. High-Precision Active Suppression of DC Bias in AC Grids by Grid-Connected Power Converters vol.64, pp.1, 2017, https://doi.org/10.1109/TIE.2016.2542126
  2. A Novel Active Damping Control of a Three-phase PWM Inverter with LC Filter vol.10, pp.4, 2015, https://doi.org/10.5370/JEET.2015.10.4.1589
  3. Compensation of Current Offset Error in Half-Bridge PWM Inverter for Linear Compressor vol.15, pp.6, 2015, https://doi.org/10.6113/JPE.2015.15.6.1593
  4. A Study on Current Ripple Reduction Due to Offset Error and Dead-time Effect of Single-phase Grid-connected Inverters Based on PR Controller vol.20, pp.3, 2015, https://doi.org/10.6113/TKPE.2015.20.3.201
  5. DC Offset Error Compensation Algorithm for PR Current Control of a Single-Phase Grid-Tied Inverter vol.11, pp.9, 2018, https://doi.org/10.3390/en11092308