330MW機(jī)組協(xié)調(diào)控制系統(tǒng)優(yōu)化設(shè)計(jì)與改造
[Abstract]:The coordinated control system (CCS,Coordinated Control System) provides a reliable guarantee for the safety, stability and economic operation of thermal power units. On the one hand, the coordinated control system makes full use of feedforward, feedback, cascade control and other control techniques to ensure that the unit can meet the requirements of power network load change quickly and maintain the stability of unit parameters when the unit responds to load changes; on the other hand, the coordinated control system makes full use of feedforward, feedback, cascade control and other control techniques. When the unit fails, the coordinated control system can cooperate with the unit protection system to deal with the accident automatically and avoid human error. Generally speaking, the coordinated control system receives the load instruction from dispatch or the operator load instruction, and receives the frequency difference signal of the power network, so that the unit has the ability of peak shaving and frequency modulation. At the same time, the coordinated control system coordinated the supply and demand relationship between boiler and steam turbine, coordinated the control subsystems of the unit, and maintained the stability of the main steam pressure. Based on the DCS transformation project of # 2 unit in Changxing Power Plant, this paper studies the hardware and software of GE Xinhua OC6000e control system, understands the function, working principle, working characteristics of the system, and grasps the related contents of the coordinated control system. The structure, working process and principle of each system of the unit are studied as well as the control methods and optimization methods used in the coordinated control system. Finally, combined with DCS basic performance test, load swing test, fixed value disturbance test, FSSS subsystem debugging test, RB test and so on, the control quality of the unit is tested, through the analysis of test curve and data. The logic configuration and controller parameters of the corresponding system are optimized and modified to improve the reliability of the coordinated control system of the unit.
【學(xué)位授予單位】:華北電力大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2017
【分類號(hào)】:TM621
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