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계통연계형 태양광 발전 시스템의 2차 고조파 저감 및 직류단 전압 센서리스 기법
- Alternative Title
- Gwang-Seob Kim
- Author(s)
- 김광섭
- Alternative Author(s)
- Gwang-Seob Kim
- Advisor
- 이교범
- Department
- 일반대학원 전자공학과
- Publisher
- The Graduate School, Ajou University
- Publication Year
- 2013-08
- Language
- eng
- Alternative Abstract
- This paper proposes a second-order harmonic reduction technique and DC-link voltage sensorless control for grid-connected PV systems. In a grid-connected single-phase system, inverters create a harmonic at twice the fundamental frequency. A ripple component unsettles the operating points of the PV array and deteriorates the operation of the maximum power point tracking (MPPT) technique. A new feed-forward compensation technique using a PR controller for ripple reduction is proposed. The proposed algorithm is advantageous in that additional devices are not required and complex calculations are unnecessary. Therefore, this method is cost-effective and simple to implement. In an inverter, a DC-link voltage sensor is essential for power conversion. A sensor fault is detected when there is an error between the sensed and estimated values, which are obtained from a DC-link voltage sensorless algorithm. Fault-tolerant control is achieved by using the estimated values. A deadbeat current controller is used to meet the dynamic characteristic of the proposed algorithm. The proposed algorithms are validated by simulation and experiment results.
- Fulltext
- Appears in Collections:
- Graduate School of Ajou University > Department of Electronic Engineering > 3. Theses(Master)
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