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arXiv 1202.5684eess.SYcs.SY
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阶跃降功率条件下PHWR的分数阶建模及其全局功率的鲁棒PIλDμ控制器控制

Fractional Order Modeling of a PHWR Under Step-Back Condition and Control of Its Global Power with a Robust PIλDμ Controller

Department of Power Engineering, Jadavpur University(贾达普大学动力工程系);Reactor Control Division, Bhabha Atomic Research Centre(巴哈原子研究中心反应堆控制部)

Saptarshi Das, Shantanu Das, Amitava Gupta

AI总结:

针对重水堆在控制棒下落场景下的阶跃降功率问题,采用分数阶模型降阶技术结合PIλDμ控制器实现死区响应和参数鲁棒性。

摘要:

在异常条件下,反应堆功率在短时间内的大幅降低称为阶跃降功率。本文利用实际测试数据,在控制棒下落场景下,使用几种最小二乘估计器变体对500MWe CANDU型加压重水反应堆进行建模,以设计控制系统,在其全局功率阶跃降低期间实现死区响应。尝试了一种新的分数阶模型降阶技术,由于建模误差较小,增加了控制回路的参数鲁棒性,并确保使用PIλDμ或FOPID控制器实现等阻尼闭环响应。因此,这种控制器可用于在系统动态特性显著变化的不同负载条件下实现主动阶跃降功率。对于降阶后的分数阶反应堆模型的闭环主动控制,PIλDμ控制器因其对系统参数偏移的鲁棒性,表现出比经典整数阶PID控制器和当前运行的反应堆调节系统更好的性能。

英文摘要:

Bulk reduction of reactor power within a small finite time interval under abnormal conditions is referred to as step-back. In this paper, a 500MWe Canadian Deuterium Uranium (CANDU) type Pressurized Heavy Water Reactor (PHWR) is modeled using few variants of Least Square Estimator (LSE) from practical test data under a control rod drop scenario in order to design a control system to achieve a dead-beat response during a stepped reduction of its global power. A new fractional order (FO) model reduction technique is attempted which increases the parametric robustness of the control loop due to lesser modeling error and ensures iso-damped closed loop response with a PIλDμ or FOPID controller. Such a controller can, therefore, be used to achieve active step-back under varying load conditions for which the system dynamics change significantly. For closed loop active control of the reduced FO reactor models, the PIλDμ controller is shown to perform better than the classical integer order PID controllers and present operating Reactor Regulating System (RRS) due to its robustness against shift in system parameters.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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