PUBLICATIONS
Paper
[International Conference] June-Seok Lee and Kyo-Beum Lee, "A Carrier-Based PWM Method for Neutral-Point Ripple Reduction of a 3-Level Inverter," in Proc. ECCE Conf., Sep. 2014, pp. 2095–2100.
- 글쓴이 관리자
- 날짜 2019-06-28 19:42
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The purpose of neutral-point voltage balancing algorithms in a 3L-NPC topology is to eliminate the DC and AC voltage unbalance
of top- and bottom-side dc-link voltages. The DC unbalance problem can cause the output current distortion; therefore, this problem
has to be solved. The AC unbalance problem means the ripple component of top- and bottom-side dc-link voltages exists. In
applications using the NPC topology, a large dc-link capacitor value is required to mitigate the AC unbalance. As a result, the size
and cost of applications become large and expensive. Therefore, this paper focuses on the compensation to mitigate the AC
unbalance of the neutral-point voltage when a carrier based PWM method is applied. In this paper, the process of the
optimal compensation value calculation is discussed and the effectiveness of the proposed compensation method is verified by
using the simulation.
