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基于超级电容储能的直驱海浪发电功率平抑控制策略研究

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Keywords: 直驱海浪发电,永磁直线电机(PMLG),超级电容,功率平抑

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Abstract:

直驱海浪发电装置随海浪起伏运动会导致直线发电机输出功率的大范围频繁波动,对电网电能质量造成不良影响,并大大降低了电力电子变换装置的利用率。本文提出一种基于超级电容储能的功率波动平抑策略,通过在海浪发电并网的直流母线上并联由超级电容和双向DC-DC变换器组成的储能单元,实现对永磁直线发电机输出功率的调节,平抑海浪发电功率的波动。本文设计了带储能单元的海浪发电并网系统各部分协调控制策略,在MATLAB/Simulink中搭建了仿真模型,实现了电机侧变流器最大海浪能跟踪、电网侧变流器单位功率因数并网和超级电容单元对海浪发电并网功率波动的平抑,验证了协调控制策略的正确性。

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