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DHC High Power Inverter Made a Significant Breakthrough in the Application of Feedwater Pump Energy-saving in Power Station2011-10-27

On October 7, No.1 steam turbine unit motor-driven feed pump inverter modification project of Datang Shuangya Thermal Power Co., Ltd. undertaken by Dongfang Hitachi (CD) Electrical Control Equipment Co., Ltd.(DHC) was officially put into operation. This project adopts patented technology of frequency conversion and multifunctional hydraulic coupler, with the operating conditions in 76% average load rate, the rate of electricity saving can reach 21%, indicating a remarkable energy-saving effect. This technical scheme made another significant breakthrough in the application of  frequency conversion and energy-saving of feedwater pump system in power station, and pioneered internationally and domestically in the application of frequency conversion and multifunctional hydraulic coupler in power-generating enterprises.

In the general practice of frequency conversion and energy-saving modifications, most of them would cancel or conduct mechanical modification to the original velocity modulated hydraulic coupler, whose technical modification scheme is of difficult construction and low economy. The technical scheme adopted by DHC not only increases the means of frequency conversion, but also reserves the original operating method of the power station, realizing the functional complementation and performance optimization between inverter and hydraulic coupler, and providing demonstration scheme for energy-saving modification project of domestic 200MW, 300MW, 600MW steam turbo generator unit motor-driven feed pump inverter.


 

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