IGCC电站中气化炉H∞非脆弱鲁棒解耦与控制研究  

Research on the H∞ non-fragile robust decoupling and control for a gasifier control system of a IGCC power plant

作　　者：恒庆海[1] 

机构地区：[1]北京信息工程学院,北京100101

出　　处：《电工电能新技术》2004年第1期16-20,共5页Advanced Technology of Electrical Engineering and Energy

基　　金：北京市教育委员会科技发展计划资助项目(KM200310772125);北京信息工程学院博士科研基金资助项目

摘　　要：IGCC电站中的气化炉具有延迟等模型不确定性。控制器(包括执行器)的实现也不可能充分精确。给出了气化炉被控对象和控制器同时摄动时的非脆弱鲁棒性能设计概念,解决了常规设计不能保证系统具有非脆弱鲁棒性的问题。根据水蒸气量对煤气热值影响可以忽略的特点,并且利用鲁棒控制的干扰概念,提出了鲁棒解耦的观点,将MIMO系统非脆弱鲁棒性能设计简化为两个SISO系统的设计。提出了通过修改不确定性权函数和性能权函数可转化为用H∞混合灵敏度求解非脆弱鲁棒控制器的一种设计方法。研究了权函数的选择,求解了H∞非脆弱鲁棒PI控制器。仿真结果表明,本文提出的设计方法是有效的。A gasifier in a IGCC power plant contains model uncertainties as time- delay, parameters, etc. The realizations of controllers (include actuators) can't be quite accuracy. The design concepts of the non- fragile robust performance of the system with the perturbations of the controlled members and the controllers are presented. It can be used to solve the non- fragile robustness problems of the gasifier control system, which can't be done by the conventional (including normal robust performance) designs. Because the steam hardly influences head value and the disturbance concept of robust control is employed, the concept of robust decoupling is presented. It is also suggested that the design of the non- fragile robust performance can be formulated as a H∞ mixed sensitivity problem about two SISO systems to the gasifier as a MIMO system if the uncertainty weighting function and the performance weighting function are revised appropriately. The selections of the weighting functions are studied and the H∞ non- fragile robust PI controllers are solved. The simulation results show that the proposed method is valid.

关 键 词：气化炉控制 控制器摄动 非脆弱鲁棒性能 鲁棒解耦 H∞控制 

分 类 号：TK472[动力工程及工程热物理—动力机械及工程]