4×250kW发电机组低温环境适应性试验研究

Experimental Study on Low-temperature Environment Adaptability of 4×250 kW Generator Set

目的研究某大功率发电机组的低温环境适应性。方法将发电机组放置于高低温综合环境模拟试验室,室温降至–55℃,保温48 h,而后升温至–40℃,保温12 h,恢复常温。结果经检查,机组用时11′20″低温启动成功,其低温持续工作的稳态电压调整率为–0.880%,稳态频率调整率为–0.036%,稳态电压波动率为0.175%,稳态频率波动率为0.080%。试验过程中,样机塑料件、橡胶件、金属件未出现故障。结论该发电机组的启动性能、电气性能、结构材料等满足低温环境适应性要求,也为其他发电机组的低温环境适应性考核提供了指导方法。

Objective To test the low temperature environment adaptability of a high power generator set. Methods The generator set was placed in a comprehensive environmental simulation laboratory of high-low temperature. The room temperature was reduced to –55 ℃ and kept for 48 h. Then it was increased to –40 ℃ and kept for 12 h before it was restored to the normal temperature. Results The generator set started successfully in 11′20″ at low temperature. Its voltage regulation factor for continuing working at low temperature was –0.880%; its steady-state frequency control rate was –0.036%; its state voltage fluctuation rate was 0.175% and its state frequency fluctuation rate was 0.080%. No failure occurred to plastic parts, rubber articles and metal piece of the model machine. Conclusion The results show that starting performance, electrical performance, and material properties of the generator set meet the requirements on low-temperature environment adaptability. Furthermore, it provides a guidance to assess low-temperature environment adaptability of other generator set.