发电机变更对双馈风电机组低电压穿越能力的影响研究

为了研究相同容量不同型号的发电机对双馈风力发电机组低电压穿越能力的影响,文章以实际运行的1.5 MW某型号风力发电机组为基础,通过对低电压穿越前后的稳态和暂态运行过程进行理论分析,论证了更换发电机的可行性,并对发电机更换导致的参数变化对机组低电压穿越能力的影响展开了定量研究。建立经过第三方认证的机组Matlab/Simulink数学模型后,将两种型号的发电机等效电路参数送入模型进行仿真,取得反映机组运行状态的主要技术指标。通过对比分析,明确了发电机变更对机组低电压穿越能力影响的定性结论,为工程实际提供了理论指导,也为目前风力发电机组低电压穿越能力检测方法的改进工作提供了思路。

Research of the influence on low voltage ride through characteristics of doubly fed wind turbine caused by replacement of generators

For studying the influence on low voltage ride through characteristics of wind power generating unit caused by replacement of generators and based on a type of 1.5MW wind turbine from GDUPC, the paper demonstrates feasibility of the replacement and carrys out a quantitative research on the influence that the replacement results in parameter variation of generator, according to theoretical analysis of transient and steady operation for the unit. In addition, a mathematical model for unit is programmed in Matlab Simulink which has been calibrated and acknowledged by third-party certification. Acquired from inputting equivalent circuit parameters of generators into the model and Simulating, Some technical indicators that reflect working status of wind power generating unit could be utilized for comparative analysis that makes a qualitative conclusion. As reference, the paper could provide theoretical guide for practical engineering application and improve the present method for LVRT detection.