报告详情
Simulation and Health Assessment of Marine Nuclear Power Secondary-loop System
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更新：2024-09-05 09:36:19 浏览：86次
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摘要
Nuclear power units have advantages that cannot be compared with conventional power, and are increasingly widely used in marine applications, and the research on nuclear power units is developing rapidly. The secondary circuit system, as a crucial part of the marine nuclear power plant, has a direct impact on the marine's power performance. The nuclear power secondary circuit system is a device that converts the thermal energy of steam into mechanical or electrical energy. It mainly consists of steam generator, turbine, condenser, condensate pump, circulating water pump, feed pump, deaerator and other equipments as well as corresponding pipelines and valves. The complex structure of the equipment in the nuclear power secondary circuit system and the harsh working environment increase the possibility of "performance degradation" and "sick operation" of the secondary circuit system; at the same time, due to the high degree of coupling of the equipment in the system, it may lead to the transmission and deterioration of faults, therefore, if the secondary circuit system is left unhealthy for a long time, it is not healthy. Meanwhile, due to the high coupling of equipments in the system, it may lead to the transmission and deterioration of faults, therefore, if the secondary circuit system is operated in a non-healthy state for a long time, it will not only reduce the efficiency of the system and increase the energy consumption, but also lead to even more serious nuclear safety accidents, which will pose a great threat. Therefore, it is of great significance to accurately measure the state of health of the secondary circuit system, to avoid the sustained degradation of the performance of the system, and to carry out a state of health assessment of the secondary circuit system.
In this paper, the simulation model of the secondary circuit system is constructed by using Jtop software of GSE simulation platform, and the PID control model of the secondary circuit system is established by using Jcontrol software so that the simulation model can operate stably. The system is debugged and calibrated in steady state, and the error between the simulation value and the design value is controlled within 5%, which verifies that the simulation model has a high accuracy; secondly, the simulation model is used to simulate the faults of heat exchange capacity degradation, output power degradation, and circulation capacity degradation of the secondary circuit system of the nuclear power system, respectively, to establish a database that meets the requirements of health assessment.
In this paper, a health assessment index system is constructed for the nuclear power secondary circuit system, a simulation database is established based on the index system, a machine learning model is used to construct the health assessment model of each equipment, and the health score curves of each equipment are obtained, and then an empowerment method is researched for the equipment-level indexes, and a comprehensive empowerment method combining a subjective empowerment method and an objective empowerment method is used for the equipment-level indexes. Subsequently, a study on the empowerment method was carried out for the equipment-level indicators, and the comprehensive empowerment method of the indicators combined with the subjective empowerment method and the objective empowerment method was adopted to carry out the empowerment study on the equipment-level indicators, and the weights of the indicators at the equipment level were obtained, which established the basis for the calculation of the health state of the secondary circuit system of nuclear power. On this basis, a suitable multi-indicator synthesis method is adopted for the nuclear power secondary circuit system, and the health state of the nuclear power secondary circuit system can be obtained by aggregating the indicators at the equipment layer. The linear weighting method is a common and universal method in the current multi-indicator synthesis method, and this paper adopts the linear weighting method to construct an overall health assessment model of the nuclear power secondary circuit system, in order to obtain an intuitive quantitative description of the health state of the nuclear power secondary circuit system. In this paper, the linear weighting method is used to construct an overall health assessment model of the nuclear power secondary circuit system, in order to obtain an intuitive quantitative description of the health of the system.
Based on the overall health assessment model of the nuclear power secondary circuit system, the data of a specific operating condition is input into the model for validation to obtain the health score of the nuclear power secondary circuit system in that condition, and the accuracy of the health assessment results of the nuclear power secondary circuit system is 100%, which proves the validity and accuracy of the method.
In this paper, the simulation model of the secondary circuit system is constructed by using Jtop software of GSE simulation platform, and the PID control model of the secondary circuit system is established by using Jcontrol software so that the simulation model can operate stably. The system is debugged and calibrated in steady state, and the error between the simulation value and the design value is controlled within 5%, which verifies that the simulation model has a high accuracy; secondly, the simulation model is used to simulate the faults of heat exchange capacity degradation, output power degradation, and circulation capacity degradation of the secondary circuit system of the nuclear power system, respectively, to establish a database that meets the requirements of health assessment.
In this paper, a health assessment index system is constructed for the nuclear power secondary circuit system, a simulation database is established based on the index system, a machine learning model is used to construct the health assessment model of each equipment, and the health score curves of each equipment are obtained, and then an empowerment method is researched for the equipment-level indexes, and a comprehensive empowerment method combining a subjective empowerment method and an objective empowerment method is used for the equipment-level indexes. Subsequently, a study on the empowerment method was carried out for the equipment-level indicators, and the comprehensive empowerment method of the indicators combined with the subjective empowerment method and the objective empowerment method was adopted to carry out the empowerment study on the equipment-level indicators, and the weights of the indicators at the equipment level were obtained, which established the basis for the calculation of the health state of the secondary circuit system of nuclear power. On this basis, a suitable multi-indicator synthesis method is adopted for the nuclear power secondary circuit system, and the health state of the nuclear power secondary circuit system can be obtained by aggregating the indicators at the equipment layer. The linear weighting method is a common and universal method in the current multi-indicator synthesis method, and this paper adopts the linear weighting method to construct an overall health assessment model of the nuclear power secondary circuit system, in order to obtain an intuitive quantitative description of the health state of the nuclear power secondary circuit system. In this paper, the linear weighting method is used to construct an overall health assessment model of the nuclear power secondary circuit system, in order to obtain an intuitive quantitative description of the health of the system.
Based on the overall health assessment model of the nuclear power secondary circuit system, the data of a specific operating condition is input into the model for validation to obtain the health score of the nuclear power secondary circuit system in that condition, and the accuracy of the health assessment results of the nuclear power secondary circuit system is 100%, which proves the validity and accuracy of the method.
关键词
Nuclear power secondary loop system,Health assessment,Machine learning,simulation
报告人
Zhan Yu
Harbin Engineering University稿件作者
全部评论
重要日期
-
会议日期
09月23日
2024
至09月25日
2024
-
09月24日 2024
报告提交截止日期
-
09月25日 2024
注册截止日期
主办单位
Harbin Engineering University (HEU)
联系方式
- Prof. WANG Xiang
- xi******@hrbeu.edu.cn
历届会议
-
2016年09月26日 中国 Chengdu,China
8th International Symposium on Symbiotic Nuclear Power Systems for 21st Century -
2016年09月26日 中国 Chengdu,China
第八届21世纪和谐核电系统国际会议 -
2010年08月23日 中国 哈尔滨市
第三届21世纪和谐核电系统国际会议（ISSNP2010）
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