Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Compensation method of average current sampling error under the operating condition of low sampling-to-fundamental frequency ratio

  • Su‑In Jo (Department of Electrical Engineering, Chungnam National University) ;
  • Wook‑Jin Lee (Department of Electrical Engineering, Chungnam National University)
  • Received : 2022.10.03
  • Accepted : 2023.01.17
  • Published : 2023.04.20
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Abstract

This paper describes the compensation method for average current sampling error under the operating condition of low sampling-to-fundamental frequency ratio. When the sampling-to-fundamental frequency ratio is lowered, the current ripple is very large, and an error between the sampled current and the average current during one sampling period occurs. The actual average current can be obtained from the relationship between the average voltage and current of the synchronous reference frame. The actual average voltage and reference voltage match when the inverter output voltage has no error. Thus, the proposed compensation method of average current sampling error can be implemented based on the reference voltage and sampled current. The proposed current compensation method is verified by simulations and experiments.

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References

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