LI Runpei,GUI Lin,WU Long,et al.Modeling and Fault Analysis of Power Supply System for Control Rod Driving Mechanism in Nuclear Power Plant[J].Automation of Electric Power Systems,2023,47(3):114-121.
LI Runpei,GUI Lin,WU Long,et al.Modeling and Fault Analysis of Power Supply System for Control Rod Driving Mechanism in Nuclear Power Plant[J].Automation of Electric Power Systems,2023,47(3):114-121. DOI: 10.7500/AEPS20220612004.
Modeling and Fault Analysis of Power Supply System for Control Rod Driving Mechanism in Nuclear Power Plant
The power supply system of the control rod driving mechanism in large-scale nuclear power plants consists of two electric generators with flywheels. The excitation modes include self shunt excitation and phase compound excitation. A serious accident occurred in an rod power supply system of self shunt excitation when one generator lost excitation and the overcurrent protection of the other generator in parallel operated first. In actual nuclear power plants
a large number rod power supply systems use phase compound excitation. In order to explore the cause of the accident and determine whether there is a common risk of protection mismatch in the rod power system
it is necessary to study fault characteristics of the rod power supply system of phase compound excitation. Based on the full compensation formula of the phase compound excitation system
this paper theoretically analyzes the relationship between the change trend of the generator terminal short-circuit current and the parameters of the phase compound excitation system
and then establishes the PSCAD model of the rod power supply system. It is found that the simulation calculation of the terminal short-circuit fault is consistent with the theoretical analysis
and the correctness of the simulation model is verified through the single-terminal short-circuit experiment of the dynamic simulation unit. In this paper
the fault characteristics of a single rod power supply system with loss-of-field fault are simulated and analyzed. Combined with the real machine experiment of the manufacturer
the effectiveness of the estimation method is verified
and the reason for the mismatch between over-current and loss-of-field protection of the accident rod power supply system is explained
which lays a foundation for the improvement of protection devices of nucleon rod power supply system.
LI Peng , WANG Rui , JI Haoran , et al . Research and prospect of planning for low-carbon smart distribution network [J]. Automation of Electric Power Systems , 2021 , 45 ( 24 ): 10 - 21 .
YANG Ting , ZHAO Liyuan , LIU Yachuang , et al . Dynamic economic dispatch for integrated energy system based on deep reinforcement learning [J]. Automation of Electric Power Systems , 2021 , 45 ( 5 ): 39 - 47 .
HUO Chengxiang , GAO Lei , WU Jianchao , et al . Effect of dynamic gain of excitation system on transient stability of salient pole generator [J]. Automation of Electric Power Systems , 2020 , 44 ( 21 ): 58 - 63 .
LYU Qi , ZHOU Hualiang , ZHU Hongchao , et al . Development and application of new generation platform for excitation regulator [J]. Automation of Electric Power Systems , 2018 , 42 ( 20 ): 165 - 170 .
JI Li , SHAO Yixiang , GAO Sujie , et al . Active disturbance rejection control for AC excitation system of variable speed pumped storage units [J]. Automation of Electric Power Systems , 2017 , 41 ( 13 ): 162 - 167 .
LU Xiang , DAI Xianzhong , ZHANG Teng , et al . Multi-objective excitation control based on ANN inverse system method [J]. Automation of Electric Power Systems , 2002 , 26 ( 12 ): 35 - 39 .
ZHOU Shuangxi , WANG Xingsheng . Nonlinear excitation controller based on the direct feedback linearization [J]. Proceedings of the CSEE , 1995 , 15 ( 4 ): 281 - 288 .
QI Jun , JIANG Quanyuan , CAO Yijia . A simple and practical decentralized nonlinear excitation control method [J]. Automation of Electric Power Systems , 2008 , 32 ( 20 ): 32 - 36 .
SHI Jichang . Optimal parameters for designing the electromagnetic self-excited constant voltage system [J]. Journal of Dalian Maritime University , 1986 , 12 ( 3 ): 48 - 54 .
HU Ronghui , ZHAO Yueping . The modeling and simulation of the dynamic process of two sets in parallel ship power station operation [J]. Ship Engineering , 2013 , 35 ( 2 ): 63 - 66 .
LI Dongli . Effect of non-linear voltage regulation characteristics of marine generators on performance of generators connected in parallel [J]. Shanghai Shipbuilding , 2010 , 26 ( 3 ): 52 - 54 .
刘东 . 孤岛电站多机组并联运行的研究 [D]. 大连 : 大连海事大学 , 2013 .
LIU Dong . Research of parallel operation with multi-unit in the island power station [D]. Dalian : Dalian Maritime University , 2013 .
YU Gaowei , ZHOU Yunhua , SHEN Zhihua , et al . Power system for control rod drive mechanism of nuclear power plants [J]. Power Equipment , 2012 , 26 ( 4 ): 278 - 281 .