Application Of High Voltage Variable Frequency Driver For Energy Saving In Zouxian Power Plant

The energy saving is a long-term strategic approach to China’s economic and social development, it’s also a very urgent task to the power industry. In recent years, power plants take a series of effective initiatives to reduce the energy consumption indicators. With the increasingly high demand for energy-saving, how to further reduce the auxiliary power ratio on the thermal power plant is on schedule.With the use of high-voltage frequency inverter in the thermal power plant, power consumption rate of power plants is decreased, it has been highly praised. High-voltage frequency inverter is effective in energy saving, which not only revolutionized the "big horse cart" phenomenon caused due to equipment design margin, to solve the problem of energy loss caused by the motor constant speed rotation can’t be adjusted, but also to avoid a large number of throttling losses,which is caused by load baffle or valve regulated. The frequency inverter’s reform is the best way of thermal power plants to reduce the auxiliary power ratio. In this paper, the Zouxian power plants are selected as a sample, the main auxiliary performance analysis, and demonstrate the feasibility of frequency transformation of. After considering at last the row of powder machine is selected to frequency transformation.In this paper study the structure and operation of the row of powder machine principle, combined with its role in the power plant, and discussed in detail the feasibility of frequency transformation of the row of powder machine. Careful analysis of the several options in the high-voltage frequency transformation, more in-depth study and discussion on the principles and applications of the frequency inverter, combined with Zouxian Power Plant unit’s operation mode and energy saving requirements, select PWM rectifier based on constant pressure the multi-level voltage source inverter frequency than the unit series, developing6kV grade motor drive systems successfully. The frequency of row powder machine is transformed in practice, and running well, providing a valuable experience for the promotion and application of high frequency technology. At the same time do some meaningful exploration of the standards and their application of high-voltage inverter. Combined with the actual needs of the thermal power plant, on the basis of in-depth analysis of the operation mode, ultimately achieve a new situation that all important auxiliary inverters run efficient、economical and reliable and energy is saved.