摘要：為了實現節能降耗，山西某大型煤礦企業針對高壓主通風機進行技術改造。根據設備的具體工藝情況，并且分析比較各種可能的技術方案，確定采用高壓變頻技術的最佳解決方案。通過對改造前后主通風機運行情況的對比分析，得出改造后電能大幅度降低、提高主通風機的控制水平的結論。 敘詞：煤礦主通風機 節能 高壓變頻器 功率單元串聯 多電平 Abstract：A large-sized coal miner starts the technical alteration for its high-voltage main fanning machine to reduce the power consumption. Following all kinds of possible solutions,optimized solution scheme which uses high-voltage frequency conversion technology is adopted, based on concrete technical conditions. Comparing the performance of main fanning machine before and after the alteration, it is concluded that the alteration can lower the use of electricity and improve the controllability of the main fanning machine. Keyword：Main fanning machine of coal mine, Energy saving, High-voltage transducer, Power cells in series, Multi-level