Langyashan pumped storage power station is located in the southwest suburb of Langya Chuzhou foothills, is by the Austrian government export credit support of major projects and Anhui "861" key construction projects. The total installed capacity of 600,000 kilowatts power plant, the installation of four single capacity of 15 million kw single-stage reversible pumped storage units. In part by the hub station on the reservoir, water conveyance system, underground powerhouse, reservoir and ground switching station under Part 5. Power Station completed, it will play in the power peaking valley, frequency modulation, and the important role emergency standby, will improve the Anhui Province and East China Power Grid thermal power unit operating conditions, to improve the security of power grid reliability and economy, economy and social benefits are very significant.
Public and ventilation air conditioning Langyashan station with multi-layered control, master control station located a station utility host computer, each subsystem local control unit located in the host and network failure conditions, the local control unit can still independently of its system monitoring and control equipment.
The local control subsystem to control the system using PLC, PLC required for a higher cost. The storage plant selection ABB AC31 family of programmable controllers. ABB AC31 series programmable controller can complete a few kilometers or even hundreds of meters of radiation distributed applications, and has economic and reliable, flexible configuration, communications, and other powerful features, fully meet the requirements of the Power Station s control.
Network structure shown below:
Utility master station is responsible for coordinating local co-management subsystems for utility work, recording and calculating operation information, and to processed data into the database, while the completion of the public and ventilation air conditioning and remote control function of the distance Jiance . Station subsystems are: factory Leakage water pump system, low pressure air compressor systems, fire pumps and rain valve control systems, ventilation and air conditioning systems, ABB AC31 50 series programmable controller system for the various sub-stations control. Which, ventilation and air conditioning system divided into the main factory building, and auxiliary plant, installation of field and auxiliary plant and several remote controller outlet shaft, each remote control station then by several sets of remote I / O for distributed control, remote I / O selection 50 Series Modbus remote expansion modules, not only improve the system s cost-effective, and can ensure the stable operation of the system. Each PLC using MODBUS protocol sub-stations and the utility host computer to communicate with the master station sub-station distance of up to 1380 meters. The entire system using a ABB AC31 family of the advantages of programmable logic controller to achieve the optimal control. The system control computer monitoring software is outstanding Fameview software, FameView is a set of industrial data acquisition, process monitoring, data management, high-performance industrial automation software, which has powerful graphics capabilities, variable, replace the modular graphics capabilities communication speed and the screen refresh is fast, but also integrated SMS, data processing and alarm services.
The whole system design is reasonable, simple, safe and reliable, the system put into operation fully meet user requirements, and has been working well, get users.