基于EMTP-RV电网电压对称跌落对双馈风电机组影响分析

为了研究电网三相电压对称跌落对双馈风电机组运行特性影响,从磁链守恒定律出发,定性分析了电网电压对称跌落时双馈风电机组定、转子输出的有功功率和无功功率、电磁转矩、机械转矩、转速以及直流电容电压等电磁分量的变化情况。并采用了定子电压定向矢量控制技术,在EMTP鄄RV中搭建了双馈风力发电机组的并网模型,仿真分析了电网电压发生40%～1s对称跌落条件下双馈风电机组的各个电磁量的变化情况,结果验证了理论推导的准确性。

Analysis of Doubly-fed Wind Generator Performance Impacted by Grid Voltage Symmetrical Drop Based on EMTP-RV

In order to study the grid three-phase voltage of symmetrical dorp the operating characteristics of the double-fed wind generator,the double-fed wind generator stator output of active and reactive power output,rotor output of active and reactive power,electromagnetic torque,electromagnetic component of the mechanical torque,speed and DC capacitor voltage changes are qualitative analysis when grid voltage symmetrical drop based on the flux law of conservation.Make use of the stator voltage oriented vector control technology to build a doubly-fed wind generator model in the EMTP-RV simulation software,and analysis the changes of the electromagnetic calorimeter of he doubly-fed wind generator under the conditions of gird voltage 40% of 1 second symmetric drop,and the results verify the accuracy of the theoretical derivation.