Small-signal stability of a grid-connected tidal power-generation system as affected by system-parameter variations

Li Wang, Jian-Ming Pan, A. Prokhorov
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Abstract

This paper presents the analyzed results on small-signal stability of a grid-connected tidal power-generation system (GCTPGS) as affected by system-parameter variations. The studied GCTPGS containing a permanent-magnet synchronous generator driven by a tidal turbine through a gearbox is connected to a power grid through power-electronics converters, a submarine cable, and a step-up transformer. A d-q axis equivalent-circuit model and the associated linearized system equations are derived to establish the complete small-signal model of the studied GCTPGS. A frequency-domain approach based on eigenvalue techniques and a time-domain scheme based on nonlinear-model simulations are both carried out to systematically determine the characteristics of small-signal stability of the studied GCTPGS under different operating conditions. It can be concluded from the simulation results that the studied GCTPGS subject to the variations of different system parameters and under operating conditions can maintain small-signal stability.
并网潮汐发电系统参数变化对小信号稳定性的影响
本文分析了系统参数变化对并网潮汐发电系统小信号稳定性的影响。所研究的GCTPGS包含一个由潮汐涡轮机通过齿轮箱驱动的永磁同步发电机,通过电力电子转换器、海底电缆和升压变压器连接到电网。推导了d-q轴等效电路模型和相关的线性化系统方程,建立了所研究的GCTPGS的完整小信号模型。采用基于特征值技术的频域方法和基于非线性模型仿真的时域方法,系统地确定了所研究的gctpg在不同工况下的小信号稳定性特性。仿真结果表明,所研究的GCTPGS在不同系统参数变化的情况下,在运行条件下仍能保持小信号稳定性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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