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自适应滑模频移孤岛检测方法的研究

, PP. 186-190

Keywords: 并网逆变器,孤岛检测,自适应滑模频移法,非检测区域

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Abstract:

光伏并网系统应具有防止孤岛效应的功能,从而保证系统的正常工作。本文详细分析滑模频移主动式检测方法的工作原理以及在Qf×f0坐标系下的非检测区域。然而,传统的滑模频移孤岛检测方法未设初始相位,理论上不能保证电网瞬间触发频率偏移。为此,提出一种新型的自适应滑模频移方法。该方法设置了初始相位角,并且在实测频率偏差超出误差范围时,以正反馈方式增加最大相位角和初始相位角,从而加速公共节点电压频率的偏移,缩短检测孤岛的时间。实验结果验证了该方法的有效性。

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