双馈风电场新型功率协调控制策略研究

Research on New Power Coordinated Control Strategy for Doubly Fed Wind Turbine

针对逐步增加风电并网规模所带来的的并网点电压波动问题,提出一种利用双馈风力发电机组(DFIG)自身无功调节能力的新型功率协调控制策略,即根据DFIG与静止同步补偿器(STATCOM)响应时间的不同,利用互补式经验模态分解算法(CEEMD)对风电场并网点所需的无功功率调节量分频、重构为两个频段,分别作为DFIG与STATCOM的参考功率,协调二者共同平抑并网点的电压波动,并以此建立Matalb仿真模型,验证所提策略的有效性。

Aiming at the problem of voltage fluctuation at the parallel point caused by the gradual increase of wind power grid scale,this paper proposes a new power coordination control strategy considering the reactive power regulation ability of doubly-fed wind turbine(DFIG)itself,that is,according to the response time difference between DFIG and static synchronous compensator(STATCOM).The complementary empirical mode decomposition algorithm(CEEMD)is used to divide and reconstruct the reactive power regulation required by wind farm merging nodes into two frequency bands,which are used as the reference power of DFIG and STATCOM respectively to coordinate the two bands to suppress the voltage fluctuation of the merging nodes.Based on this,the Matalb simulation model is established to verify the effectiveness of the proposed strategy.