Development of PWR feedwater controller using $H-\infinity$ loop-shaping techniques = $H-\infinity$ loop-shaping 기법을 이용한 가압경수형 원자력 발전소의 급수제어기 개발

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In this thesis, a robust $\It{H-\infin}$ loop-shaping controller for the steam generator (SG) feedwater control system of the KSNP (Korean Standard Nuclear Power Plant), a 1000MWe pressurized water reactor with vertical U-tube type steam generators (UTSG) is developed. The SG feedwater control system maintains the SG water level by controlling the feedwater flowrate using feedwater control valves. In order to develop the robust $\It{H-\infin}$ controller, SG models for the control of feedwater to the KSNP UTSG are identified. As the first step of SG model identification, a precise SG mathematical thermal-hydraulic model is built using the RELAP5/MOD3 system simulation computer code. The developed RELAP5/MOD3 SG model is inadequate to be used for the design of controller due to its complexities. Thus, the SG thermal-hydraulic model needs to be simplified while maintaining required accuracy in describing the principal dynamics of the SG. For this, as the second step, a series of model experiments using the developed thermal-hydraulic model are performed in order to acquire input-output data sets representing the SG characteristics in terms of SG water level dynamics as a function of the feedwater flowrate, steam flowrate, feedwater temperature, and reactor power. As the final step, the $\Bf{Simple Process Models}$ are applied to create a simple, continuous-time process SG model for control. The input-output data sets obtained from the model experiments using the RELAP5/MOD3 SG model are utilized in developing the algorithm to describe static gain, dominating time constants, and a possible delay of transfer function of the SG system. Since the SG operating characteristics are strongly dependent on the operating power level, the SG operating range from 0 to 100% power is divided into 10 sub-operating points based on the plant operation experiences as well as the operating modes of the KNSP SG. A number of robust $\It{H-\infin}$ controllers for the SG models iden...
Advisors
Seong, Poong-Hyunresearcher성풍현researcher
Description
한국과학기술원 : 원자력및양자공학과,
Publisher
한국과학기술원
Issue Date
2010
Identifier
418669/325007  / 020015154
Language
eng
Description

학위논문(박사) - 한국과학기술원 : 원자력및양자공학과, 2010.2, [ x, 103 p. ]

Keywords

Loop Shaping; H-infinity Robustness Control; Steam Generator Model; Feedwater Control system; 주급수제어계통; 루프 형상; H-infinity 강인제어; 증기발생기모델

URI
http://hdl.handle.net/10203/49019
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=418669&flag=dissertation
Appears in Collection
NE-Theses_Ph.D.(박사논문)
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