Doubly-fed induction generator enabled power generation in ocean wave energy conversion system
Doubly-fed induction generator enabled power generation in ocean wave energy conversion system
复制标题
双馈感应发电机实现海浪能量转换系统发电
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
S. Bhattacharya
中科院分区：
文献类型：
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作者：
S. Hazra;A. Dean;S. Bhattacharya
本文提出了一种利用双馈感应发电机（DFIG）进行振荡波能变换器发电的电源结构。与风能转换系统不同，波浪能转换系统中DFIG的定子电路不能直接与电网相连。在WECS中，DFIG的速度从一个方向振荡到另一个方向。由于转速方向的变化，提出了将DFIG定子与电网相序切换连接的方案。此外，在低运行速度下，DFIG滑移速度增加，这需要更高的转子侧变流器额定电压。因此，为了在转子侧电压有限的情况下运行DFIG，定子电路在低速时发生短路。在此基础上，提出了基于DFIG的wcs发电体系结构。本文介绍了该系统的总体硬件结构和控制体系结构，以及系统的工作原理。在MATLAB-Simulink平台上通过仿真验证了系统的运行。对于整个系统的仿真，考虑了WEC模型。
This paper proposes a power architecture to utilize doubly-fed induction generator (DFIG) for power generation from oscillating wave energy converter (WEC). Unlike in wind energy conversion system, the stator circuit of the DFIG can not be tied directly with the grid in wave energy conversion system (WECS). In WECS, the speed of the DFIG oscillates from one direction to another. Due to the change of direction of the speed, the stator of the DFIG is proposed to be connected with the grid with switched phase sequence. Also, at low operating speed the DFIG slip speed increases which requires higher voltage rating of the rotor side converter. Therefore, to operate the DFIG with limited rotor side voltage the stator circuit is short circuited at low speed. With these modifications, the DFIG based power architecture is proposed to generate power from WECS. In this paper, the overall hardware and control architecture and system operation are presented. System operation is validated through simulation in MATLAB-Simulink platform. For simulation of the whole system, a WEC model is considered.