CAJ | 학술논문

针对直驱永磁风力发电机结构相对复杂，现阶段磁路法分析不够准确、数值分析方法应用不是特别充分的问题，以Ansys为分析工具建立了同时考虑永磁直驱风力发电机和外电路特性的场路耦合模型，得到了能够研究电机空载、负载及非正常运行等不同工况的一体化分析模型。以一台1.5 MW永磁直驱电机为例，使用场路耦合时步有限元法，建立了半单元电机模型，计算了其空载、负载功角性能，以及突然短路时的永磁体退磁特性。通过对比仿真与实测得到的相关曲线，发现其吻合较好，证明了该时步有限元分析模型具有良好的计算精度，可为永磁直驱电机的准确性能计算提供参考。
침대직구영자풍력발전궤결구상대복잡，현계단자로법분석불구준학、수치분석방법응용불시특별충분적문제，이Ansys위분석공구건립료동시고필영자직구풍력발전궤화외전로특성적장로우합모형，득도료능구연구전궤공재、부재급비정상운행등불동공황적일체화분석모형。이일태1.5 MW영자직구전궤위례，사용장로우합시보유한원법，건립료반단원전궤모형，계산료기공재、부재공각성능，이급돌연단로시적영자체퇴자특성。통과대비방진여실측득도적상관곡선，발현기문합교호，증명료해시보유한원분석모형구유량호적계산정도，가위영자직구전궤적준학성능계산제공삼고。
For direct-drive permanent magnet wind generator ( DDPMG) structure being relatively complex, at this stage, the analysis method based on magnetic circuit was not accurate enough, and the application of numerical analysis method was not particularly full. Taking Ansys as a powerful tool, a field-circuit coupled model considering DDPMG and the characteristics of external circuit was built up. By this model, the DDPMG no-load, with-load and fault operation conditions could be studied. A 1. 5 MW DDPMG as an example, using field-circuit coupled time-stepping FEM, half-unit motor model was established. The no-load, with-load power angle performance and the magnet demagnetization characteristics due to suddenly short-circuit had been calculated. By comparing of the simulation and measurement curves, it could be found that they matched well. This demonstrated that the time-stepping finite element analysis model had good accuracy and it could be used to estimate the DDPMG performance accurately.