Method for suppressing subsynchronous oscillation generated by wind power through flexible direct current grid connection

• Main Authors: CAI YUN, ZHAO LE, CAO YILONG, FENG YUYAO, YU YINGHUI, CHAI WEI, LI KE, JIANG YOUHUA, GUAN CHANGSHU, XIONG XUEJUN
• Format: Patent
• Language: Chinese; English
• Published: 02.05.2023
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; SYSTEMS FOR STORING ELECTRIC ENERGY

The invention relates to a method for suppressing subsynchronous oscillation generated by wind power through flexible direct current grid connection, and the method is characterized in that the method comprises the following steps: 1, building an equivalent system model of a direct-driven wind power plant in a PSCAD/EMTDC in a PSCAD/EMTDC based on novel subsynchronous oscillation caused by the interaction of the direct-driven wind power plant and a flexible direct current power transmission grid-connected system; step 2, performing small-signal dynamic modeling on a wind power plant through a flexible direct current power transmission grid-connected system according to an equivalent system model in PSCAD/EMTDC, and obtaining a subsynchronous oscillation mechanism; 3, obtaining the influence of the wind power plant operation condition and the system controller parameter on the system oscillation characteristic based on the subsynchronous oscillation mechanism of the wind power plant through the flexible direct