发电机定子线棒接触系数试验系统电池健康状态估算研究
Research on the Estimation of State of Health of the Battery in the Contact Coefficient Test System for Generator Stator Bars
张斌 1薛继超 2陶泽宇 3张明 4赵惠德4
作者信息
- 1. 华能牙克石发电有限公司,内蒙古 牙克石 022150
- 2. 华能满洲里达赉湖热电有限公司,内蒙古 满洲里 021400
- 3. 华能根河光明热电有限责任公司,内蒙古 根河 022350
- 4. 北京进义科技有限公司,北京 102308
- 折叠
摘要
为对大型发电机定子线棒防晕层与定子铁心接触状态进行定量综合评估,提高发电机定子线棒槽内部分电晕放电缺陷的检修水平,提出了一种发电机定子槽内线棒表面电位分布和线棒槽内部分电晕放电强度的测试方法,并设计制造了可携式接触系数试验仪.作为试验仪的电源,锂离子电池的健康状态估算对于保障其工作的安全性和可靠性具有重要意义.基于改进无迹变换算法和自适应滤波算法提出一种改进的无迹卡尔曼滤波算法,重点对定子线棒槽内接触系数测试系统硬件所采用的锂离子电池健康状态估计展开研究.搭建试验平台进行算法仿真试验,仿真结果显示所采用的锂离子电池模型及其健康状态估计算法可快速实现对模型参数的实时更新,且具有较高的精度和稳定性,可满足接触系数测试系统在大型发电机定子线棒槽内部分电晕放电状态检测评估应用的要求.
Abstract
In order to quantitatively and comprehensively evaluate the contact state between the anti corona layer of the stator bar and the stator iron core of a large generator,and to improve the maintenance level of partial co-rona discharge defects in the stator bar slot of the generator,a testing method for the surface potential distribu-tion of the stator bar in the generator stator slot and the corona discharge intensity inside the slot is proposed,and a portable contact coefficient tester is designed and manufactured.As the power supply of the test instrument,the health state estimation of the lithium-ion battery is of great significance to ensure the safety and reliability of its work.Based on the unscented transformation algorithm and adaptive filter algorithm,an improved unscented Kalman filter algorithm is proposed.The focus is on the research of the health state estimation of lithium-ion batteries used in the hardware of the stator bar slot contact coefficient testing system.An experimental platform for algorithm simulation experiment is build,and simulation results show that the lithium-ion battery model and its health state estimation algorithm used can quickly update the model parameters in real time,and have high accuracy and stability,which can meet the requirements of the contact coefficient testing system for detecting and evaluating partial corona discharge status in the stator bar slot of large generators.
关键词
发电机/定子线棒/电晕放电/接触系数/无迹卡尔曼滤波算法/电池健康状态估计Key words
generator/stator bar/corona discharge/contact coefficient/unscented Kalman filter algorithm/esti-mation of state of health of batteries引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据