) 1.中广核工程有限公司 核电安全监测技术与设备国家重点实验室, 广东 深圳 518172
2.上海交通大学 自动化系, 上海 200240
收稿日期:2020-10-29出版日期:2022-01-28发布日期:2022-01-21通讯作者:袁景淇E-mail:jqyuan@sjtu.edu.cn作者简介:惠久武(1996-),男,山东省日照市人,博士生,主要从事核电站关键设备机理建模及先进控制策略研究.基金资助:核电安全监控技术与装备国家重点实验室开放课题(K-2019.426)A Real-Time Mass Flow Rate Estimation Method of Recirculation Water in Steam Generator of Nuclear Power Plants
HUI Jiuwu1,2, LING Jun1, LUAN Zhenhua1, WANG Gaixia1, DONG He2, YUAN Jingqi2() 1. State Key Laboratory of Nuclear Power Safety Monitoring Technology and Equipment, China Nuclear Power Engineering Co., Ltd., Shenzhen 518172, Guangdong, China
2. Department of Automation, Shanghai Jiao Tong University, Shanghai 200240, China
Received:2020-10-29Online:2022-01-28Published:2022-01-21Contact:YUAN Jingqi E-mail:jqyuan@sjtu.edu.cn摘要/Abstract
摘要： 根据蒸汽发生器的实际结构,将蒸汽发生器划分为热段、冷段、汽水分离器和汽室,热段和冷段又划分为下降通道和上升通道.基于质量、能量、动量守恒定律,依次建立蒸汽发生器热段、冷段、汽水分离器和汽室分布的参数模型.结合工质物性参数数据库和数据采集系统 (DCS) 实时测量数据实时求解模型,从而获得蒸汽发生器再循环水的质量流量估计值.采用某CPR1000核电机组运行数据的验证结果表明,由所提方法解算得到的蒸汽发生器顶部出口饱和蒸汽温度、压力和质量流量与实测值吻合较好,从而间接证实了蒸汽发生器再循环水质量流量估计的正确性.
关键词: 蒸汽发生器, 分布参数模型, 再循环水, 质量流量, 实时估计
Abstract: According to its actual structure, the steam generator is divided into the hot leg, the cold leg, the steam-water separator, and the steam chamber, where the hot leg and the cold leg are further divided into a descending channel and an ascending channel. Based on the mass, energy, and momentum conservation laws, the distribution parameter models for the hot leg, the cold leg, the steam-water separator, and the steam chamber are established. Combining the physical parameter database of the working medium and the data collection system (DCS) real-time measurement data, the model is solved in real time and the estimated mass flow rate of recirculation water is obtained. The verification results using the operating data of a CPR1000 nuclear power unit show that the calculated temperature, the pressure, and the mass flow rate of the outlet saturated steam of the steam generator agree well with the measured values, which indirectly verifies the correctness of the estimation approach of recirculation water proposed in this paper.
Key words: steam generator, distributed parameter model, recirculation water, mass flow rate, real-time estimation
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