海上直驱风力发电机绝缘系统的环境适应性研究

Research on environmental adaptability of insulation system for offshore direct-drive wind turbine

为了评估海上风力发电机绝缘系统的环境适应性,对绝缘树脂以及模拟绕组开展多因子循环试验,包含高低温试验、湿热试验、盐雾试验和振动试验,并对试验前后漆片和模拟绕组的电性能变化进行表征和分析。结果表明:老化试验后,环氧改性不饱和聚酯浸渍树脂性能未发生显著劣化,模拟绕组的常规绝缘性能仅有小幅度衰减,其剩余击穿电压几乎未发生衰减,关键材料以及模拟绕组均表现出良好的耐海上环境特性。海上直驱风力发电机绝缘系统在经历长时间的海上多因子循环老化试验后,依然保留着稳定优异的介电性能,可满足海上环境的使用要求。

To evaluate the environmental adaptability of insulation system for offshore wind turbine,multi-factor cycling tests including high and low temperature test,humid heat test,salt spray test,and vibration test,were conducted on insulating resin and simulation winding,and their electrical performance changes before and after tests were characterized and compared.The result show that after ageing tests,the performance of the epoxy modified unsaturated polyester impregnating resin does not deteriorate significantly,the normal insulating performance of simulation winding just deteriorate slightly,its residual breakdown voltage is almost no attenuation,and both the key materials and simulation winding exhibit good resistance to marine environments.The insulation system of offshore direct-drive wind turbine still retains stable and excellent dielectric performance after long-term offshore multi-factor cyclic ageing tests,which can meet the requirements of marine environment.