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With the development of science and technology, energy has been widely applied in various kinds of fields. Some studies have shown that the pumps and fans’ consumption of electricity is about 6.1% of the country's electricity generation annually. The problem of low efficiency is serious. Nowadays, power plants mainly use fixed mode. Desiring too large also makes the pumps and fans off the operating point easily, which low the efficiency and high the energy consumption. Depending on theoretical analysis and proof, it is shown that the frequency conversion technology can greatly improve the efficiency of pump and fan in this paper. Taking Chinese Dalian Development Zone Thermoelectric power plant’s water pump and fan in Ruiming Power Plant for example, conclusions can be acquired. The frequency conversion technology can greatly improve the efficiency of the pump and the fan, and its application prospects in the power plant is very considerable.

Analysis of Energy Conservation on Application of Variable of Frequency Technology in Pump and Fan System in Power Plants