CAJ | 학술논문

本文针对电励磁直驱风电系统,分析了传统控制策略及低电压穿越特性,提出一种机侧变流器的限流模式,同时网侧变压器运行于无功优先输出模式的控制策略.该控制策略有效地降低了故障期间的直流侧过电压,提升了并网点电压.基于MATLAB/Simulink 搭建了仿真平台,仿真结果表明该控制策略的有效性.
본문침대전려자직구풍전계통,분석료전통공제책략급저전압천월특성,제출일충궤측변류기적한류모식,동시망측변압기운행우무공우선수출모식적공제책략.해공제책략유효지강저료고장기간적직류측과전압,제승료병망점전압.기우MATLAB/Simulink 탑건료방진평태,방진결과표명해공제책략적유효성.
@@@@The traditional control theory and Low-voltage-ride-through (LVRT) Capability were analyzed based on the Electric Excitation Direct Driving Wind Turbine. An improved scheme was proposed. During grid voltage sag, the active current of generator-side converter is limited and the DC-link overvoltage is decreased. The grid-side converter operates at the reactive power priority mode and exports reactive power rapidly to increase the grid-side voltage. Matlab/Simulink model was set up, and simulation results verify the effectiveness and feasibility of the proposed control strategies.