電站鍋爐給水pH值的分段預(yù)估控制器設(shè)計(jì)

按照火電廠鍋爐給水加藥過程的主要因果關(guān)系，抽象出一條因果鏈。針對(duì)其大時(shí)滯特性，提出分段預(yù)估控制方法，選取合適的測(cè)量點(diǎn)和測(cè)量變量，將大時(shí)滯分成三段較小時(shí)滯的子系統(tǒng)，對(duì)每一個(gè)子系統(tǒng)進(jìn)行預(yù)估控制，各子系統(tǒng)之間依托因果鏈傳遞預(yù)估和控制信息，最終完成整個(gè)系統(tǒng)的控制。仿真結(jié)果表明此種方法對(duì)于大時(shí)滯系統(tǒng)的控制具有理想的控制效果。
關(guān)鍵詞: 大時(shí)滯；因果鏈；分段預(yù)估控制
Abstract: According to the basic causality of power plant feedwater process, one causality chain is elicited. In view of its long time-delay characteristic, piecewise prediction and control method is proposed. Chooseproper survey points and survey variables, long time-delay system is divided by three shorter time-delay subsystems. Design prediction and control
for every subsystem, depend on the causality chain to transmit prediction and control information, finally achieve to the integrated system control. Simulation indicates that this method processes excellent effect for control long time-delay systems.
Key words: long time-delay; causality chain; piecewise prediction and control