International Journals Hae-Gwang Jeong, Kyo-Beum Lee, Sewan Choi, and Woojin Choi, “Performance Improvement of LCL-Filter Based Grid Connected-Inverters Using PQR Power Transformation,” IEEE Transactions on Power Electronics, vol. 25, no. 5, pp. 1320–1330, May 2010. -SCI
2010
본문
The demand for three-phase pulsewidth modulation (PWM) inverters in applications such as power control or grid connecting has
been on the increase in recent years. Such inverters are connected to the grid via an L filter or an LCL filter to reduce the harmonics
caused by the switching. An LCL filter can reduce the harmonics induced by low switching frequency and generates a satisfactory
level of grid-side current using a relatively low inductance, as compared to an L filter. The additional poles introduced by the LC part
induces resonance in the system, leading to stability problems; this paper presents a compensation method using power theory to
improve these issues, so that the performance of the designed LCL filter system can be improved. The effectiveness of the proposed
algorithm is verified by simulations and experiments.
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