23.2 Reliability of High Voltage Inverter The inverter is a noisy human power electronic device. According to the investigation by the relevant units, the reliability of the domestic high-voltage inverters is still not satisfactory to the power plant. Not only the inverters of individual brands, but also many brands of inverters have more or less the failure of the inverter itself or the external cause-induced tripping. . It is not uncommon for the boiler furnace to extinguish the fire or reduce the output of the unit. Therefore, in addition to the fact that the actual performance proves that the reliability is high, the power frequency of the wind turbine can be automatically restored, and the operation of the generator set can be kept stable. The Xi'an Thermal Engineering Institute developed the Ming Dynasty in the 1990s. 1 sen automatic switching device, which is called the small pharynx power station boiler blower frequency change speed control operation proves that the boiler fan frequency conversion speed automatic switching device is practical and reliable, and the inverter is faulty. The motor can be switched to the power frequency in time to enable the fan to run at a certain speed. At the same time, the fan inlet regulating door can dynamically adjust the air volume, and can suppress the sudden change of air volume to keep the boiler burning stable. Effectively solve the safety and reliability of power plant boiler fans using variable speed adjustment. 3. Today's 0.3 automatic control system of large generator sets only need to properly design the inverter's import and export and bypass switch cabinets according to the above requirements, 6 system improved configuration, and Do a good job in the adjustment characteristics test and overall commissioning of the fan inlet adjustment door, and the boiler fan can be better solved by the reliability of the frequency conversion speed regulation.
Liu Jiaxuan. Power plant fan transformation and reliability analysis. China Power Publishing Qi Chunsong, Dong Kangtian, Liu Jiaxuan. Boiler Fan Frequency Control Automatic Switching Device Air Compressor Group Microcomputer Monitoring System Li Jianfeng Research and Research Institute of Yanzhou Mining Bureau jointly developed by Zhangzhou Mining Group Corporation Yangcun Coal Mine and Shandong Coal Science Research Institute, with programmable control The core air compressor group microcomputer monitoring system completely solves the problem that the air compressor monitoring system of the air compressor with the single-chip microcomputer or the industrial control machine as the core does not allow the anti-interference ability of the whole machine to be poor, and improves the operation of the air compressor. Security during the process.
Air compressors are an important power equipment for coal mine production. At present, most of the air compressors operating in China do not meet the requirements of the coal mine safety regulations for the operation of air compressors, so the failure rate is high and the maintenance amount is large. In recent years, although some mines have adopted air compressor automatic control and microcomputer drawing technology. It is difficult to adapt to the special production environment of the coal blast air card machine after the selected machine type or the technical measures adopted. It cannot be used normally after installation. The newly developed air compressor group 稂 microcomputer monitoring system is a real-time acquisition of the field signal by the temperature transmitter pressure transmitter water shutoff device, sent to the relevant modules of the programmable controller, and then the mouth is buried Sensor-specific digital meter for real-time monitoring! The working status of the heart equipment and the parameters of the enemy temperature monitoring and protection pressure monitoring and protection of the water and the protection of electrical parameters monitoring and protection of the air compressor group centralized control and other functions of its main performance characteristics 1 åž machine imported original strong. Its modular structure and easy-to-understand programming language, Yin Yin on-site maintenance; 2 using high-precision temperature pressure transmitter and sensor-specific digital display linear power supply to the module power supply shielded cable wiring and other technologies. 3 The system has centralized control. Parameter automatic inspection and inspection, the interval between the user can be freely set and manually detected, and has the function of running the indicator alarm to silence the reset; 4 hardware configuration of the machine is reasonable, software structured design, performance price It is made by a high-tech panel and has a beautiful appearance.
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