双馈异步电机空载并网数字物理混合仿真技术

风机并网过程中会产生励磁冲击电流,为研究其安全稳定并网策略,文中利用数模混合仿真技术搭建了双馈异步电机的数学模型以及其空载并网数字物理混合模型.提出了一种滤除动态系统中由接口产生的多余谐波的新型L-DIM功率接口.利用Shmilink仿真建立了双馈异步发电机并网及其功率接口模型,并于微电网实验室中搭建了功率硬件在环实验平台,于RT-Lab实时仿真系统中对双馈电机空载并网过程进行了仿真试验研究.经数模混合仿真实验结果表明,所设计功率接口在保证了风机侧波形的精确性同时能够有效地减少并网过程产生的励磁电流冲击,验证了风机并网数模混合仿真技术的必要性.

Power Hardware-in-the-loop Simulation for Noload Grid-connection of DFIG

In order to study its safe and stable grid-connection strategy,the mathematical model of doubly-fed asynchronous motor and its no-load grid-connection digital physical hybrid model are established by using digital-analog hybrid simulation technology.A novel 1-dim power interface is proposed to filter out excess harmonics generated by interfaces in dynamic systems.Simulink simulation was used to establish the grid connection model of doubly-fed asynchronous generator and its power interface model,and the power hardware in the loop experiment platform was built in the micro-grid laboratory,and the process of the doubly-fed motor grid connection without load was simulated and studied in the rt-lab real-time simulation system.The simulation results show that the designed power interface not only guarantees the accuracy of fan side waveform,but also effectively reduces the excitation current shock in the process of grid-connection,and also verifies the necessity of the hybrid simulation technology of fan grid-connection.