Electric energy is a clean and high-quality secondary energy. Electric energy production consumes a large amount of primary energy, and it also consumes a large amount of auxiliary power. In recent years, the operation of desulfurization, denitrification, etc. has greatly increased auxiliary power consumption and reduced auxiliary power consumption. Rate is one of the main tasks of energy conservation and consumption reduction in thermal power plants. It not only reduces primary energy consumption, reduces power generation costs, increases profits, but also reduces pollutant emissions. As a power generation enterprise actively responds to national energy conservation and environmental protection policies and takes the initiative to assume social responsibilities, the research and application of this project are carried out.  This  project integrates the benefits of "energy conservation, environmental protection and low-carbon". It uses data mining technology and applies regression analysis methods to study and obtain the change laws of the power consumption rates of more than 10 major auxiliary machines such as forced draft fans, induced draft fans, primary fans, circulating water pumps, and condensate pumps of two 600MW thermal power units with output coefficients and temperature, providing effective analysis means for in-depth optimization, and forming a set of auxiliary power monitoring and optimization analysis system. The key problem of in-depth optimization of auxiliary power consumption rate is solved.  In view of the characteristics of closed cycle of thermal power units, we took the lead in implementing the frequency conversion and energy-saving technical transformation of high-power circulating water pumps in China, and further realized the frequency conversion automatic control of circulating water pumps in dual turbine units. This automatic control method is the first time in China, effectively reducing the circulating water pump. Power consumption.  Aiming  at the most advanced level of similar units in China, we have analyzed and studied the massive data of various auxiliary machines under different working conditions over the years, deeply explored the potential for energy conservation, and implemented the optimization and transformation of condensate pump impeller removal, condensate pump, closed cooling pump and other auxiliary machines adopt frequency control, and implement high-frequency power supply energy-saving and emission reduction technical transformation of the dust remover. The dust remover also achieves emission reduction purposes; The scope of in-depth optimization covers most auxiliary machinery and systems in the plant. Because the various systems of the unit are closely connected and mutually restrained, the principles of ensuring power generation safety and in-depth optimization of integration are adhered to during the implementation of the project. The implementation time span of some projects is nearly 10 years. During this period, a large number of experimental studies were carried out and a series of key technologies were overcome; This project is used to study the transformed auxiliary machinery and the untransformed auxiliary machinery to obtain their power consumption rate curve with load and temperature. Hundreds of curves of more than 10 auxiliary machinery are applied to the optimal control of auxiliary machinery, realizing the in-depth optimization of auxiliary machinery.  From the application of the research results of this project in 2003, the overall technology has been in use for more than 10 years in 2013. After the application of the results, in 2012, when the output coefficient was only 66.26%, the power consumption rate of the production plant was 5.09%. Excluding desulfurization and denitrification, the power consumption rate of the production plant was only 3.87%. Under the new operation conditions of desulfurization and denitrification, the service power consumption rate is basically the same, ranking among similar units in China.  Compared with 2003, in 2012, the output coefficient of the unit dropped by 18 percentage points, the auxiliary power rate dropped by 0.92 percentage points, and the coal consumption for power supply dropped by about 3.16 g/kWh. About 20,500 tons of standard coal were saved every year, and the new profit was about 26.5 million yuan., the emission reduction of CO2 was about 49,800 tons, SO2 was about 1,400 tons, and solid particulate dust was about 0,300 tons.  Most of the technical achievements in this project are general technologies and have no special requirements for power plants. They can be widely used in the technical transformation of new units and old units with various capacities and parameters.  This project will promote the development of technology to reduce plant power consumption in my country, have a strong radiating and driving effect on energy conservation and emission reduction in the thermal power industry, and will also enhance the level and international competitiveness of my country's power generation technology field.