The Analysis Of Control System Of Turbine Barring Gears Based On PLC

Because of the rapid development of microelectronics and computer technology, the wide application of the microprocessor, and continual renovation of technology, the old method that jigger adopt can't meet the needs of demanding to improve automatic level of power plant in the country already. Seeing that a great deal of advantages that PLC based on microprocessor possesses, especially its ability of high dependability and stronger adaptive capacity of abominable industrial environment, so the Barring gears of newly build power plant generally adopt PLC as their control systems at present.The author, because of participating in the turbine Barring gears debugging of Lei yang power plant 3 and 4 "unit in Hunan Province, so, have more ocular, more overall understanding as to CSBG~[1] from composition of system to operation at scene. This text puts forth effort on to the analysis of CSBG on the basis of PLC, carry on systematic analysis from operation principle, hardware, software installation to debugging in it its, and has put forward the main point and precautions of every part separately. While overall analyzing in CSBG, have analyzed about the overall principle and CSBG operation principle, have analyzed 5 kinds of operation ways of CSBG and the main circuit of controller emphatically. While analyzing this part in CSBG hardware, concentrate on to PLC capacity, I/O module and PLC processor, assign introduction / output point and on the power module mainly. Then introduce the general course of PLC software design, can seek the location entity and ladder language at first, secondly to aim directly at the ladder chart and the logic control picture of CSBG mainly, take the method that the subsection contrasts respectively, carry on exhaustive analysis one by one, to how realize every function of CSBG, and how go on the scene operate it and go on overall analysis to CSBG. Finally, introducing PLC installation environment needing to be followed and laying the item that should be paid attention to while construct the cable, the preparation, the method of program debugging, CSBG scene test before debugging, to some concrete problems that are met while debugging, have summarized and summed up, and has put forward the corresponding solution. Through the analysis of CSBG, contribute to the harmony that is debugged at scene and settle reliable foundation for steady operation and correct maintenance of power plant in the future.