Power control and grid-connected operation for tidal current energy conversion system

被引：1
|
作者：
Gu Y.-J. [1 ]
Li W. [1 ]
Liu H.-W. [1 ]
Lin Y.-G. [1 ]
Gu H.-G. [1 ]
机构：
[1] State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Hangzhou
来源：
Liu, Hong-Wei (zju000@163.com) | 1974年 / Zhejiang University卷 / 51期
关键词：
Current velocity preview; Generator speed control; Grid connection; Pitch control; Tidal current energy conversion;
D O I：
10.3785/j.issn.1008-973X.2017.10.011
中图分类号：
学科分类号：
摘要：
A special tidal current energy conversion system was taken as an object to analyze the power control characteristic and grid-connected operation property. The mechanical structure was pitching rotor-single stage drive-permanent magnet synchronous generator. The electrical structure was rectifier-chopper-inverter. The model of drive chain from rotor to generator was constructed. A generator speed control strategy based on tidal current velocity preview was proposed considering the undetectable tidal current velocity at rotor. A pitch control based on power feedback was proposed to solve the existing problems of nonlinearity and huge calculation in direct angle feedback pitch control. The grid-connected operation property was analyzed by combining DC bus voltage control and active-reactive current decoupling. The situ experimental results show that the grid-connected system has a good operation property and a high quality of output power. Both the speed control strategy to capture maximum power under the rated tidal current velocity and the pitch control strategy to limit output power above the rated tidal current velocity were verified. © 2017, Zhejiang University Press. All right reserved.
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页码：1974 / 1980
页数：6
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