1MRK002246-BD Power supply board used as a printed circuit board for the pressure stabilization board
Brand ABB Wind speed 260m/s power board
Weight 37.8Ib Power 270VDC frequency 650Hz
Channel dual channel power capacity 1020W available for sale Beijing: Tianjin: Hebei; Shanxi;
Type Heavy industry application module Model 1MRK002246-BD
1MRK002246-BD Power supply board used as a printed circuit board for the pressure stabilization board
3.1 Machine and Furnace Coordinated Control System (CCS)
The coordinated control system of engine and furnace is the main control system of thermal power station. The task of PPB022DE01 HIEE300867R0001 coordinated control system is to control the energy balance and mass balance between the input and output of the unit. Continuously eliminate all kinds of internal and external interference in operation, meet the load demand of the power grid for the unit, and stabilize the operation of the unit. The main functions are: accept the load dispatching of the power grid, participate in peak regulation and frequency modulation; To realize the balanced control of energy input and output of boiler and turbine; Coordination of control actions of each subsystem in boiler; The coordination between the unit output and the actual capacity of auxiliary equipment and so on.
3.2 Furnace Safety Protection System (FSSS)
Furnace safety protection system mainly includes flame monitoring and burner cutting and start-stop management. PPB022DE01 HIEE300867R0001 realizes pressure protection, flout protection and purge protection through logical chain. The system determines reasonable alarm protection logic conditions according to boiler type, coal type and combustion system to avoid signal misdetection or boiler explosion accident. The control instruments used in the logic interlocking and control section have now evolved from the early relays or solid-state components to programmable logic controllers (PLCS). Because PLC can be configured according to dual redundancy system, the system has high control reliability. The software is prepared by ladder diagram, which is easy to configure programming and modify control flow.
3.3 Turbine Electro-hydraulic Regulation System (EH)
In the 1980s, due to the improvement of the reliability of electrical components, control equipment and electro-hydraulic converters, and the use of high pressure anti-fuel servomechanism, the electrical control system is more and more for the turbine, to achieve the speed, after the adjustment of the pressure, the three circuits of electric power control, as well as valve management, the function of starting the response force. The control turbine generator set starts from the turning of the wheel, rushes, warms the engine, raises the speed, switches the valve, connects to the grid, carries the initial load, adds the load, until the normal operation, participates in the power grid primary frequency modulation and accepts the power grid dispatch to change the load. On the basis of ensuring the safety of the unit, the objectives of prolonging the life of the unit and improving the economy of the unit in the steady-state operation are achieved.
3.4 Turbine Bypass Control System (BPS)
PPB022DE01 HIEE300867R0001 Turbine bypass control system is composed of high and low pressure bypass pressure regulation system and high and low pressure bypass temperature regulation system. The bypass valve actuator can choose electric or electro-hydraulic actuator according to the requirements of the system on the torque and speed during operation. The control system is traditionally completed by the bypass system supplier, and now there are also power plants using single-loop controllers or DCS to realize the functions of the turbine bypass control system.
Fourth, the development trend of electrical automation control system
The emergence of OPC (OIJE for Process Control) technology, the promulgation of IEC61131, and the wide application of Microsoft’s Windows platform make the combination of electrical technology in the future, and the computer increasingly plays an irreplaceable role. IEC61131 has become an international standard, is being widely adopted by major control system manufacturers. Pc client/server architecture, Ethernet, and Internet technologies have led to revolution after revolution in electrical automation. IT is the demand of the market that drives the integration of automation and IT platforms, and the popularity of e-commerce will accelerate this process. Internet/Intranet technology and multimedia technology have a wide application prospect in the field of automation. The management of the enterprise can use the standard browser to access the financial, personnel and other management data of the enterprise, and can also monitor the dynamic picture of the current production process to understand the most comprehensive and accurate production information in the first time.
The application of virtual reality technology and video processing technology will have a direct impact on the design of future automation products, such as human-machine interface and equipment maintenance system. The corresponding software structure, communication capability and easy to use and uniform configuration environment become important. The importance of software is growing. The trend is moving from single devices to integrated systems.
1MRK002246-BD Power supply board used as a printed circuit board for the pressure stabilization board
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