Sang-Hyouk Lee, “PMSG를 이용한 풍력발전 시스템의 3병렬 운전과 계통 연계 기술,” 아주대학교 공학석사 학위 논문, 2010. > Paper

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Paper

Thesis Sang-Hyouk Lee, “PMSG를 이용한 풍력발전 시스템의 3병렬 운전과 계통 연계 기술,” 아주대학교 공학석사 학위 논문, 2010.

2010

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This paper proposes a design of the three-parallel converter system and grid-connection technique for wind turbine systems using

a PMSG. The back-to-back converter of the wind turbine system is directly connected to the grid so that both the power devices

and the filters are needed to have large power ratings. The three-parallel converter configuration and LCLfilter can reduce the

required power ratings of the devices and filters. However, the three-parallel converter can cause circulating currents. These

circulating currents can be suppressed by sellecting proper inner inductance at each leg. Second, grid connection techniques are

proposed. The resonance caused by the LCL filter is compensated by an active damping method using power theory without

additional power loss. The decline of the power quality caused by the unbalanced and distorted grid voltages is also compensated

with an additional compensation algorithm. The simulation and experimental results show that the proposed system and

compensation methods are effective for the wind turbine systems. 

 

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