A Finite-Time Differentiator with Application to Nuclear Reactor Inverse Period Measurement

Energies

卷:15

Zhe Dong¹  Xiaojin Huang¹  Duo Li¹  Yajun Zhang¹  Yunlong Zhu¹  Yujie Dong¹  Zuoyi Zhang¹ 

[1] Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of Education, Collaborative Innovation Centre of Advanced Nuclear Energy Technology, Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China;

关键词: reactor period;    growth rate;    differentiator;    finite-time stability;   

DOI  :  10.3390/en15124487

来源: DOAJ

【 摘 要 】

The measurement of the growth rate, or the so-called inverse period, of a nuclear reactor is crucial for safety monitoring and control purposes. Due to the inevitable statistical fluctuation of neutron flux at low power-levels, it is difficult to precisely estimate the inverse period from the pulse counting data in the source range. Motivated by the equivalence of the measurement of inverse period and the differentiation of the logarithm of pulse count, a new differentiator is proposed, which is finite-time convergent with a bounded steady estimation error. The feasibility of this newly-built finite-time differentiator is verified by numerical simulation. Then, based on the pulse count data recorded during the startup of a test reactor, the differentiator is used to estimate the inverse period and its derivative, as well as the period and the reactivity of the reactor. The results show that the differentiator is capable of providing a satisfactory estimation of signal derivatives under strong noise.

【 授权许可】

Unknown