Journal of the Korea Institute of Information and Communication Engineering (한국정보통신학회논문지)

The Korea Institute of Information and Commucation Engineering (한국정보통신학회)
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Sensorless Control of 3-phase PFC AC/DC Converter using Kalman Filter

칼만필터를 이용한 3상 PFC AC/DC 컨버터의 센서리스 제어

  • Park, Jun-Sung (Department of Electrical Engineering, Pusan National University) ;
  • Kwon, Young-Ahn (Department of Electrical Engineering, Pusan National University)
  • Received : 2016.01.04
  • Accepted : 2016.04.15
  • Published : 2016.05.31
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Abstract

This paper investigates a new sensorless control appling a virtual flux oriented vector control without the line voltage sensor for the power factor correction of 3 phase PWM converter. The DC output voltage is controlled by applying the kalman filter algorithm for the virtual flux estimation and the synchronous phase is obtained by using the estimated virtual flux equation based on kalman filter. This method is used to reduce the calculation time of the system and obtain a stable control that the input current including the harmonics and the noise is improved. The proposed system implement PFC algorithm in the variable region of DC output voltage. It can obtain the unity power factor, and can precisely control the DC output voltage in the load variation and in the variable voltage range. The performance of the proposed algorithm is verified through simulation and experiment.

3상 PWM 컨버터는 입력 전류를 정현적으로 제어할 수 있어 입력 전류의 고조파 성분을 감소시킬 수 있고 입력 전압에 대하여 입력 전류의 위상을 제어할 수 있다. 본 논문은 3상 PWM 컨버터의 역률개선을 위하여 전원전압센서를 사용하지 않고 가상자속기반 벡터제어를 적용한 새로운 센서리스 제어방식을 연구하였다. 직류출력전압은 칼만 필터를 적용하여 추정한 가상자속에 의해 제어되며, 동기위상은 추정된 가상자속을 이용하여 위상을 얻는다. 제시한 PFC 알고리즘은 역률개선 및 가변영역에서 직류출력전압, 부하변동에서 직류출력전압을 정밀하게 제어할 수 있는 우수성을 가진다. 본 논문에서 제안한 가상자속추정 알고리즘을 적용한 칼만 필터 성능은 실험과 시뮬레이션을 통해서 검증하였다.

Keywords

References

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