吴昊,胡鹏飞,辛焕海,汤波.直流电容电压自同步控制下的永磁直驱风机低电压穿越控制策略[J].电测与仪表,2025,62(12):202-210. WU Hao,HU Pengfei,XIN Huanhai,TANG Bo.Low-voltage ride through control strategy of permanent magnet direct-driven fan under DC capacitor voltage self-synchronization control[J].Electrical Measurement & Instrumentation,2025,62(12):202-210.
直流电容电压自同步控制下的永磁直驱风机低电压穿越控制策略
Low-voltage ride through control strategy of permanent magnet direct-driven fan under DC capacitor voltage self-synchronization control
With the large-scale access of new energy sources such as wind power to the power grid, the inertia of the power system decreases, the frequency modulation ability decreases, and the dynamic performance of the phase locked loop in weak power grid deteriorates. The effectiveness of the low-voltage ride through (LVRT) control strategy for permanent magnet direct-driven wind turbines based on the phase locked loop grid-connection is greatly reduced. Therefore, a LVRT control strategy for permanent magnet direct-driven wind turbines under the direct current capacitor voltage self-synchronization control is proposed. The control strategy introduces a DC capacitor voltage self-synchronizing control unit into the unit control, which eliminates the need for wind turbines to rely on traditional phase locked loop structures for grid-connection. A super capacitor energy storage system is connected in parallel at the DC side of the unit to build an integrated wind storage system to achieve power balance and improve the control of the grid side converter, enabling it to provide reliable reactive power support for voltage recovery during grid voltage drops, improving the low voltage ride through capability of the permanent magnet direct drive wind turbine unit, the effectiveness of the proposed control strategy is verified based on MATLAB/Simulink simulation platform.
