It was completed in August 1999 and has a construction period of 60 days. After the transformation, the equipment was successfully started, the unit was slammed, and the load on the grid was fully centralized in the control room. Since the operator station uses the Jia 10013 operating system, the human-machine interface is very friendly, and all operations can be completed on the 01 by the mouse. The whole system software is open, the hardware types are few, and the versatility is strong. It is easy for users to add other auxiliary functions. Through the transformation, the operation operation is simplified, the operation reliability of the equipment is improved, and various control indexes are uniformly met with the ministerial standards. After several months of abnormalities or obstacles, the effect of the transformation is ideal. 2.1 Improve equipment reliability The example system uses dual-loop power supply, and the road is taken from the factory. 3 power supply, the road is taken from the thermal security section, and the two power supplies achieve bumpless switching. In this way, the possibility of downtime due to power loss of the 00 person 3 system is greatly reduced. In addition, when the electrical professional overhauls the power supply equipment, as long as it is carried out in stages, reasonable power-off operation will not affect the normal operation of the system. The internal power supply card signal of the control system is 0. It is redundantly designed to ensure the high reliability of the system, and it is also convenient for online maintenance and replacement of almost all equipment during operation. Pure electric control, each inlet valve includes high and medium pressure main steam valves, high and medium pressure regulating doors are independent control loops, any component failure in the valve control loop will only affect one valve, and has little impact on unit load. All control components can be inspected and replaced online, and the valve can be put into operation after the fault is processed. Added online testing capabilities to critical equipment and circuits. For example, the pressure switch for detecting 1 oil pressure is on-line test; the jumper protection is performed by the person 31 solenoid valve test only the oil pressure low oil pump interlock test; the activity test of each inlet valve and so on. All tests are completed on the 0-footer by selecting the corresponding test button, the operation is simple, the test method is completely simulated, and the test is highly reliable, and the test does not affect the load. The unit 103 is overspeeded and the mechanical overspeed test can be performed by the 0,1 system. The original mechanical emergency interrupter is retained in the front box of the turbine, and the interface with the high-voltage emergency interrupting system is realized through the diaphragm valve. In this way, the mechanical overspeed protection device remains, increasing system safety. The historical data station uses a large-capacity hard disk. All parameters on the network can be collected through the historical data collection function. The storage time is only related to the hard disk capacity. In addition, the engineer station installed the touch 0 drive, and the 640-elb elbow 0 disk can be used to periodically copy all data offline for detailed data, providing detailed data for the year-round operational analysis. 10 sensors are used for valve opening feedback. After special design, it is made of high temperature resistant material, and the long-term working temperature can reach 90. 3 After the experience and experience of the transformation, the opening degree relationship of each regulating valve is completed by the control system imitation original cam distribution mechanism, so the control characteristics are not completely equivalent to before the transformation. In the process of rushing, in order to make the turbine enter the steam, the force is uniform, and the single valve control is used. It is different from the multi-valve rushing start when the liquid is adjusted, and the rushing parameters should be adjusted accordingly. After the completion of the transformation of the gate gorge power plant, the first startup rushing parameters are the main steam pressure 52 and the steam temperature 380. Due to the high parameters, the speed control accuracy meets the requirements, but the valve opening curve is not ideal. When the unit starts to rush, the parameters of the overshoot are adjusted to the main steam pressure of 3.43, and the main steam temperature is 320 and the hot steam temperature is 237 弋. Due to the lower parameters, the steam pressure fluctuations have less disturbance to the control, avoiding the valve opening. Degree of fluctuations. After 00, after the grid connection, the initial load setting is very close to the steam pressure parameter before grid connection. According to the theoretical calculation and several times of grid connection experience, the main steam pressure before grid connection should be greater than 4, and the reheat steam pressure should be less than 0.25, must be strictly controlled, otherwise the medium voltage regulating door will be fully opened before the grid connection or fully connected to the grid, causing the steam volume of the medium pressure cylinder to suddenly increase, which will endanger the safety of the unit. In order to minimize the oil cycle time after the transformation, the welding quality must be guaranteed. Pipe cutting should be carried out with pipe cutters, and each pipe and pipe fittings should be carefully cleaned. All joints are welded by argon arc welding, and the welds of all pressure pipes are to be subjected to radiographic inspection. In the later stage of the oil cycle, the external side filter is 8200 oil filter, and the bypass is processed online, the effect is more ideal. In this transformation, all cables on the oil motive are made of high-temperature flame-retardant fluoroplastic sheathed cable with a long-term working temperature of more than 200. All local to control cabinet cables are made of 105 smoke-free flame-retardant 003 cable to ensure control signals. Long-term reliable transmission. China's first 800-bend Jia steam turbine generator set was successfully connected to the grid. Domestic scientific and technological information The largest single-capacity steam turbine generator set in China The 800-breasted Jia unit of the Yuzhong Power Plant in Liaoning Province was successfully connected to the grid at the end of 1999. The construction of the Yuzhong Power Plant, which was undertaken by Liaoning Electric Power Engineering Co., Ltd., is the key project of the national planning. It plans to install 4 units with a total capacity of 3,200 cubits. The project will install two sets of 800 cubits of Russian-made supercritical units. The total steel structure and mechanical and electrical equipment installed in the project will total 230,000. The power plant also marks a new step in the installation of thermal power units in China. 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