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Gold River three stations automation of remote control computer

Abstract: After transformation, the Gold River three stations to computer monitoring system, based on no regular monitoring system. Under normal circumstances, the operation of power station equipment in the secondary stations to monitor control room operator on the workstation, but also in three stations in the control room operator workstation and the crew of the LCU (Local Control Unit) on the implementation of control equipment to monitor its operation and control. Two stations in the control room operator workstations and three stations in the control room operator workstations each other redundant, full-stop support system through the main bus and the computer industry and accept the monitoring system is connected,[link widoczny dla zalogowanych], while in control of these systems are cabinet also has optical digital signal, control switches and buttons,[link widoczny dla zalogowanych], can now monitor the equipment. Key words: three remote control station computer monitoring industry bus from the 70s of last century, the computer monitor a number of hydropower plants in foreign countries made substantial progress, there has been computer-controlled hydropower plants. However, because the computer initially more expensive, limited performance and other reasons,[link widoczny dla zalogowanych], the whole plant with only one computer to realize the main condition monitoring and operation, usually no closed-loop regulation control. In recent years, with computer technology and the rapid development of communication technology, the performance of maturing, declining prices, it is logical to replace the conventional automatic wiring device provides a good physical infrastructure. According to incomplete statistics, China has had more than 40 large power plants to achieve a computer monitor, many small and medium sized power plants have been implemented or are actively preparing for the transformation of the computer monitor. Shifang, Sichuan Gold River Gold River Power Company Limited owned two, three stations located in the town of Shifang City Red Papaya Village territory, is the Tuo River tributary of gold, a cascade power station, two stops away from the plant more than 50 kilometers in Shifang city. Gold River three stations mainly use the two power stations in the tail water run-of-head hydropower station, power station design head of 72 meters, the installed capacity 2X1.6MW, power outlet of a return to 6.3KV voltage of the boost access to secondary station station, the post-boost to the 110KV grid. hydropower plants of the most fundamental task is to achieve safe and economic operation. Gold River three power station put into operation since November 1999 since the company management, operation and maintenance personnel, the joint efforts of the entire station staff and careful maintenance, continue to carry out the process and technology equipment defects improve the safety and protection of the power station economic operation. Although the station has achieved safety without incident for four years running, but there are also security risks following: Since the plant three points away from the secondary station 3 km, traffic inconvenience, to run the personnel shift and inconvenience of life, surface and the second and third points in the landslide area between the sections for the accident-prone section of the production staff to create a great threat to the security; three stand plants in the river bottom, flood control capacity of poor, coupled with further elevation of the mineral ballast sediment river water level, flood control capacity of the three points much lower than the design requirements of a serious threat to the power plant equipment and personnel; the 1999 flood 815 attacks, resulting in three major accidents station flooded factory. Although not for the accident caused major damage to major equipment, has seriously affected the control systems and auxiliary equipment reliability, production safety for the tremendous power hidden; not achieve automatic operation and remote monitoring, can not meet the duty The same time, the three stations using computer governor and excitation device, the other major components also are automatic control equipment, field conditions are suitable for computer monitoring. rehabilitation programs instead of automatic control system with computer control system relay; using optical fiber communication technology will stand three levels of control signals transmitted to the secondary station for remote control. Two, three stations, each with a power level monitoring system, two systems mutually redundant. After transformation, transformation theory Gold River three points based on computer control system, no routine monitoring system. Under normal circumstances, the operation of power station equipment in the secondary stations to monitor control room operator on the workstation, but also in three stations in the control room operator workstation and the crew of the LCU (Local Control Unit) on the implementation of control equipment to monitor its operation and control. Two stations in the control room operator workstations and three stations in the control room operator workstations each other redundant, full-stop support system through the main bus and the computer industry and accept the monitoring system is connected, while in control of these systems are cabinet also has optical digital signal, control switches and buttons, can now monitor the equipment. System Components Gold Creek Station computer monitoring system is divided into three layers and the current ground level station. Power level and the current formation (LCU), respectively, with the full range of monitoring real-time database and historical databases, each LCU can directly monitor the production of equipment: either as a distributed system is to intelligent terminals, but also as a Automatic control device independent run separately. IEEE802.3 local area network in accordance with the design, distribution of a fully open structure,[link widoczny dla zalogowanych], network media using optical fiber (transmission distance, wide bandwidth, anti-interference ability), communication protocol for the ICP / IP, network transmission bandwidth of 100M. power layer devices include: operator workstations, voice alarm device, printer, power layer network devices. are ground equipment including: PLC, integration of IPC, cubicle, relays, power collection device, temperature data logging devices, speed measurement equipment such as signal acquisition equipment. computer monitoring system of Figure 1 Figure 3.2 works (see Figure II) 3.2. a computer control system operation and control normal circumstances, the secondary station operator workstation unit responsible for monitoring and control; three station operator workstation monitors motor operation. Two, three mutually redundant station operator workstation, when one Renyiyitai fails, another master workstation workstation automatically become responsible for monitoring unit. If the communication system failure, resulting in power and now layer device communication interrupt control unit, LCU can enter the main control unit is responsible for monitoring methods. LCU on the IPC (Integrated IPC) mutually redundant, IPC failure on one after the other two LCU IPC can be controlled. 3.2.2 can be the main function of unit open, stop and convert conditions the active and reactive power control; accident emergency unit outage; division and unit circuit breakers,[link widoczny dla zalogowanych], including automatic synchronization parallel; joint control (AGC, AVC); unit of the main and auxiliary equipment to monitor operating conditions; data recording, processing, and statistics. 3.2.3 Local Control Unit features (a) The acquisition and processing interrupt, status switch and pulse volume acquisition and processing interrupt with interrupt capability as switch, fast response (1-2ms), so the generator protection accident information, unit-speed signals over 20 measuring points as the interrupt switch input. When these signals occur, which can be processed into. Units, governor, excitation, switches, auxiliary equipment, such as failure, status, location of signals measured in 60 points as the state switch modification occurs all the time switch, can generate the event log. Processing contents of control according to the actual writing process. Accidents usually change the signal type, is to start the control flow control unit shutdown accident. Failure, state class signal modification, the start control process for exception handling. Records all events, processes, implementation of self-preservation at the inter device, all brought to the crew. communication, analog acquisition and processing AC input, 15 Road, respectively, such as terminal voltage and current signal provided by the power collection device communication. analog collected on 8, a rotor current, voltage, volute pressure, governor oil level and so on. communication, analog real-time data temperature, the amount of acquisition and processing temperature acquisition, the use of three temperature detector unit 3 sets of bearings temperature and a temperature detection apparatus of the generator rotor and stator of the point loop detection, and data communication through the 485 to the LCU. (b) human contact unit control unit depends mainly on human contact IPC's LCD screen and keyboard to control operation of the keyboard, LCD screen can display the clock, active , reactive alarm point, the unit tile temperature, the temperature and the main transformer on the screen, trend curves, etc., and can display on analog, it is important to open into the modification and control operations during the incident signal. Priority emergency stop control at the unit level. (c) of the unit control, regulate, period unit open, stop and conversion conditions; unit active and reactive power of change, with a PID regulator to see properties; circuit breaker open and close; with the unit operating the gates, pump operation. (d) the communication with the master-class up bit machine running data transmission units, receiving, and Master-level executive power issued by the AGC, AVC and other commands. (V) clock synchronized with the clock and the master class.