Based On The Design And Implementation Of The Westinghouse Dcs Control System Of 600mw Unit Deh System Function

Steam turbines are used for thermal power generation. In the thermal power plant, with boilers, generators and other auxiliary equipment necessary, the chemical energy in coal into steam heat, steam and then converted into heat energy in the rotating mechanical energy, and finally rotating mechanical energy into electrical energy, through the transmission of electrical energy to power a variety of electrical equipment, for the people's production and living standards.In the energy conversion process, in order to ensure power quality, maintain the grid frequency, usually require stable at its rated speed near the speed of a small range of changes, which on a higher turbine control requirements.With the continuous development of science and technology, turbine control technology has undergone rapid changes, as the steam turbine power generation equipment, more and more to high-capacity, high parameter direction, in order to obtain the highest possible thermal efficiency, reduce manufacturing, installation and operation costs. This equipment is more complex, especially in the process of changing conditions, the need for more comprehensive control factors, and a simple hydraulic control system has been difficult to meet the requirements.With the development of computer technology, its integrated computing power is evident in its reliability has been significantly raised, is now widely used in a variety of equipment, power plant monitoring and control system. Turbine control system is no exception, by the pure power of hydraulic adjustment system to a liquid coexist-regulating system. Microprocessor-based distributed control system (DCS) technology, the use of decentralized control, centralized management of design, not only the reliability of control has been greatly improved, and operation and maintenance can significantly reduce the labor intensity. Currently,300WM and larger units, generally using digital electro-hydraulic control system (DEH), so that the operation of the unit cell has undergone a qualitative leap for the coordination and control system (CCS), automatic generation control (AGC) and CIMS and other systems create the conditions for successful implementation. This broad absorption in the country, inside and outside the advanced technology, based on the design of a new generation of600MW with the level of the whole turbine supporting DEH DEH-based control system. The control system uses the latest Westinghouse developed the world's advanced level of OVATION system...