电网电压跌落下双馈感应风电机组控制性能测试方案

A Test Scheme of Control Performance for Doubly-fed Induction Generator Under Grid Voltage Dip

基于电网电压跌落和恢复下的双馈感应发电机电磁暂态响应分析,提出了定子非同步并网模拟电网电压跌落和恢复的测试方案。通过控制转子励磁电流,使定子与电网电压在非等幅值情况下并网。电机暂态直流磁链、定转子电流以及中间直流电压的响应分析表明,测试方案能够模拟电网电压跌落和恢复过程中双馈感应发电机的暂态响应,实现电机侧变流器控制性能的测试。仿真和实验结果验证了测试方案的可行性。

Based on the analysis of electromagnetic transient response,a test scheme to simulate the grid voltage dip and recovery by the stator asynchronous grid-connection is presented.The stator grid-connection is implemented under the condition that the magnitude error between the stator and grid voltage which is controlled by the rotor magnetizing current.The transient behavior of the stator-flux,stator and rotor currents,and DC-link voltage are analyzed.It indicates that the proposed test scheme can simulate the grid voltage dip and recovery.And the control performance of the rotor side converter is tested.Simulation and experimental results validate the feasibility of this test scheme.