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作 者:吴宗礼 李绍勇[1] 魏先宏 李海林 韩喜莲[1] WU Zong-li;LI Shao-yong;WEI Xian-hong;LI Hai-lin;HAN Xi-lian(School of Civil Engineering,Lanzhou University of Technology,Lanzhou 730050,China)
机构地区:[1]兰州理工大学土木工程学院,甘肃兰州730050
出 处:《控制工程》2020年第10期1781-1787,共7页Control Engineering of China
基 金:国家自然科学基金项目(61364004);甘肃省自然科学基金(1508RJZA109);兰州理工大学博士研究基金项目(B04-237);兰州理工大学建工七七基金项目(TM-QK-1301)。
摘 要:汽—水型热交换器作为热力站当中的重要设备之一,具有非线性、参数时变和时滞等动态特性。首先,综合分析集中供热工艺和自动控制的相关要求,对汽—水型热交换器的各个组成单元分别进行建模,确定主控制器为供水温度PIλDμ控制器(Water Supply Temperature Fractional Order Proportional Integral Derivative Controller, WST-FOPIDC)和副控制器为蒸汽流量PIλ控制器(Steam Flow Fractional Order Proportional Integral Controller, SF-FOPIC)的串级控制策略。其次,应用修正的粒子群优化算法(Modified Particle Swarm Optimization Algorithm,MPSOA),分别整定出WST-FOPIDC和SF-FOPIC的8个控制器参数最佳值。最后,基于MATLAB工具,对该串级系统进行组态和数值仿真相应地控制效果。结果表明,该串级系统在理论上是可行的,可以获得更为满意的控制效果,且供水温度的控制效果明显优于基于Ziegler-Nichols(Z-N)整定法的供水温度PID-蒸汽流量PI串级调节系统。The vapor-water type heat exchanger is one of the most important equipments in thermal power station. It has some dynamic characteristics of non-linearity, time-varying volatility of parameters, and time-delay, etc. Firstly, the related requirements of central heating technological process and automatic control are analyzed synthetically, and the constitutional plants of vapor-water type heat exchanger are modeled respectively. A cascade control strategy of water supply temperature fractional order proportional integral derivative controller(WST-FOPIDC) as the main controller and steam flow fractional order proportional integral controller(SFFOPIC) as the secondary controller is determined. Secondly, a modified particle swarm optimization algorithm(MPSOA) is applied to tune the optimal values of eight parameters of WST-FOPIDC and SF-FOPIC, respectively. Finally, by means of MATLAB tool, the proposed cascade system is configured and the corresponding control effect is simulated numerically. The results show that this cascade control system is feasible in theory, which can obtain more satisfactory control effect, and the corresponding control effect of water supply temperature is obviously better than that of water supply temperature PID-steam flow PI cascade control system based on Ziegler-Nichols tuning method for the parameters of these two controllers.
关 键 词:汽-水型热交换器 串级控制系统 分数阶PID控制技术 MPSOA 数值仿真
分 类 号:TU833[建筑科学—供热、供燃气、通风及空调工程]
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