Subsynchronous oscillation suppression method and device for offshore wind power direct current collection system

The invention discloses a subsynchronous oscillation suppression method and device for an offshore wind power direct current collection system. The method comprises the following steps: acquiring a valve side alternating current voltage value usabc and a valve side alternating current value isabc; inputting the valve side AC voltage value usabc and the valve side AC current value isabc into an adaptive fuzzy neural network, and outputting a virtual resistance value Rdamp; based on the virtual resistance value Rdamp, the dq-axis component isdq of the valve side current and the dq-axis component usdq of the valve side voltage, a voltage value u'sdq fed back to converter valve outer ring control is determined. According to the method, the subsynchronous oscillation suppression capacity of a direct current collection and transmission system of offshore wind power and the like is improved, and the operation stability of the whole system is improved. 本发明公开了一种海上风电直流汇集系统次同步振荡抑制方法及装置。所述方法包括，获取阀侧交流电压值usabc和阀侧交流电流值isabc