摘要
在详细分析永磁直驱风力发电系统并网电流负序分量及谐波分量产生机理的基础上,从改善永磁直驱风电系统输出电能质量的角度出发,提出了一种采用准比例谐振(quasi-proportional-resonant,quasi-PR)控制器抑制并网负序电流分量及谐波电流分量的控制策略。该控制策略不仅可有效抑制由电网电压不平衡引起的并网电流负序分量,而且能抑制由电网电压或发电系统引入的低次谐波电流分量。仿真验证了上述控制策略的正确性和可行性。
On the basis of detailed analysis on the mechanism causing negative-sequence and harmonic currents during the grid-connection of permanent magnet direct-driven wind power generation system, to improve the output power quality of permanent magnet direct-driven wind power generation system a control strategy, in which the quasi-proportional-resonant （quasi-PR） controller is adopted, is proposed. The proposed controller not only can effectively suppress the negative-sequence component in grid-connecting current due to unbalance of network voltage, but also can suppress the low-order harmonic currents from network voltage or generation system. The correctness and feasibility of the proposed control strategy are verified by simulation results.
出处
《电网技术》
EI
CSCD
北大核心
2011年第7期29-35,共7页
Power System Technology
基金
国家863高技术基金项目(2007AA05Z422)
国家自然科学基金项目(51007097)
中央高校基本科研业务费资助项目(CDJZR11150009)~~
关键词
风力发电
永磁同步发电机
电网电压不平衡
谐波
准比例谐振控制器
wind power generation
permanent magnetsynchronous generator （PMSG）
unbalanced grid voltage
harmonic
quasi-proportional-resonant （quasi-PR） controller
