Induced draft fans in power plants run under complex and harsh conditions

where various faults often occur. These faults not only affect the fans' safety and stability but also pose an indirect threat to normal operation of the boiler system. Thus

early fault monitoring and prompt

accurate diagnosis are essential to ensure the power plants' operation efficiency and safety. Common fault types of forced draft fans and their potential effects are analyzed and summarized. Three typical fault types and their causes are explained in detail. Fault monitoring and diagnosis methods are elaborated from both quantitative and qualitative perspectives

including measurement point installation and data processing techniques. Each method's advantages and disadvantages are analyzed

and suitable applications for different fault types are discussed

along with proposed targeted improvement measures. Finally

key challenges of fault diagnosis are identified

and future development directions for forced draft fans' fault monitoring and diagnosis are outlined.