Abstract : This paper introduces the characteristics of fans and the energy-saving principle of frequency conversion. The application of high-voltage frequency converters to fans in thermal power plants significantly reduces the plant's power consumption rate and achieves substantial energy savings. Keywords : High-voltage frequency converter, ventilation fan, energy saving 1 Introduction The power consumption of auxiliary equipment in thermal power plants is substantial, resulting in a plant power consumption rate of approximately 8%. Reducing this rate is a way to alleviate power shortages and improve the economic efficiency of power plants. Fan power consumption accounts for a significant proportion of the plant's power consumption. Traditional fan airflow regulation uses baffle adjustment, resulting in significant power loss. Variable frequency speed control technology can save a considerable amount of energy. This paper analyzes the frequency conversion retrofit of the ventilation fans in Xinxiang thermal power plant and its energy-saving effects. [b]2 Equipment Parameters 2.1 Main Boiler Parameters[/b] (1) Rated Evaporation Capacity: 670t/h (2) Steam Drum Working Pressure: 15.8MPa (3) Main Feedwater Pressure: 17.7MPa (4) Superheated Steam Temperature: 540℃ (5) Main Feedwater Temperature: 246℃ (6) Flue Gas Temperature: 129℃ 2.2 Main Parameters of Blower (1) Model: YD1250/630-8/10/1730 (2) Current: 140/76A (3) Voltage: 6000V (4) Speed: 745/596 (r/min) (5) Wiring: 2Y/Y [b][align=center]For details, please click: Application of High Voltage Frequency Converter in Thermal Power Plant Blowers[/align][/b]