电网继电保护设备可靠性评估机制研究
发布时间：2018-10-10 16:00
【摘要】：通过对近年来电力事故的调查研究表明,继电保护系统的非正常动作是引起事故的主要原因之一,严重情况时可能造成地区大面积停电。由于继电保护系统是保证电力系统安全、稳定运行的最重要一环,如何保证其工作状态极其可靠性就显得尤为重要。当前对于继电保护系统运行质量的检测还只停留在硬件检测上,不能对系统的各个方面进行全面的质量评估、状态预测,存在一定的滞后性。如果能够研制一套评估系统,对于继电保护设备的状态及其可靠性发展趋势进行评估和预测,提前做好应对继电保护系统失效风险的计划,便能更好的保证继电保护系统动作的可靠性,提高电力系统的电能供应效率和安全性。论文针对淮南市电力公司相关科研项目,详细研究了继电保护设备的运行数据,通过分析故障设备、老化设备、退役设备的各项工作参数,通过对大量的数据处理和统计提出了一种继电保护风险评估系统。该系统能够模拟不同型号继电保护设备在运行过程中的失效率变化情况,并在评估设备运行环境的基础上,给出该设备当前的运行风险,并指导对该设备的检修维护工作。在算法上,论文以三参数Weibull模型为基础,选取某地电力公司的实际继电保护设备运行参数,包括设备基本信息、设备运行情况、设备运行参数、检修及维护记录等,利用最小二乘法对数据的处理拟合,获取接近现实运行情况的继电保护设备失效率模型;在获取设备失效率变化趋势函数后,通过设备性质及其运行方式的重要性,制作相对应的Markov模型,通过失效率预估值的大小,选择风险最小的模型参数,对设备当前运行风险进行评估;针对所计算设备的风险评估值,参照电力公司相关规定及检修策略,给出相应的为何策略,用于指导继电保护设备的检修和维护工作。最后,通过Matlab的GUI界面系统,对论文所构建的系统进行软件的制作,同时对论文中的计算结果以及评估质量进行运行和测试,并给出了评估设备的失效率参数质量和风险评估值。在软件运行过程中,通过对实际在运设备的评估计算,获得了相应的风险评估值以及检修策略建议。系统的研究及软件的制作对相关项目的起到了理论支撑和实际应用的效果。
[Abstract]:Through the investigation and study of electric power accidents in recent years, it is shown that the abnormal operation of relay protection system is one of the main causes of the accidents. As the relay protection system is the most important part to ensure the safety and stability of the power system, it is very important to ensure the reliability of the system. At present, the inspection of the operation quality of relay protection system is still only on the hardware inspection, which can not evaluate the quality of all aspects of the system, state prediction, there is a certain lag. If a set of assessment systems can be developed to evaluate and predict the status of relay protection equipment and its reliability development trend, and to plan ahead to deal with the failure risk of relay protection systems, It can better guarantee the reliability of relay protection system and improve the efficiency and safety of power supply. According to the related scientific research projects of Huainan Electric Power Company, the paper studies the operation data of relay protection equipment in detail, and analyzes the working parameters of the faulty equipment, aging equipment and decommissioned equipment. A relay protection risk assessment system is put forward by processing and statistics of a large amount of data. The system can simulate the failure rate of different types of relay protection equipment during operation, and on the basis of evaluating the operating environment of the equipment, it can give the current operation risk of the equipment, and guide the maintenance and repair of the equipment. In the algorithm, based on the three-parameter Weibull model, the paper selects the actual relay protection equipment operation parameters of a certain power company, including the basic information of the equipment, the operation situation of the equipment, the operation parameters of the equipment, the maintenance and maintenance record and so on. The failure rate model of relay protection equipment is obtained by using the least square method to fit the data, and after obtaining the trend function of equipment failure rate, the importance of equipment property and operation mode is obtained. Making the corresponding Markov model, selecting the model parameters with the minimum risk through the size of the pre-estimate of failure rate, evaluating the risk of current operation of the equipment, and evaluating the calculated value of the risk of the equipment. According to the relevant regulations and maintenance strategies of the power company, the corresponding strategies are given to guide the maintenance and repair of relay protection equipment. Finally, through the GUI interface system of Matlab, the software of the system is made, and the calculation results and evaluation quality of the paper are run and tested. The failure rate parameter quality and risk evaluation value of the equipment are also given. In the course of software operation, the corresponding risk evaluation value and maintenance strategy suggestions are obtained through the evaluation and calculation of the actual equipment in operation. The systematic research and the software production have played the theory support and the practical application effect to the related project.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM774
[Abstract]:Through the investigation and study of electric power accidents in recent years, it is shown that the abnormal operation of relay protection system is one of the main causes of the accidents. As the relay protection system is the most important part to ensure the safety and stability of the power system, it is very important to ensure the reliability of the system. At present, the inspection of the operation quality of relay protection system is still only on the hardware inspection, which can not evaluate the quality of all aspects of the system, state prediction, there is a certain lag. If a set of assessment systems can be developed to evaluate and predict the status of relay protection equipment and its reliability development trend, and to plan ahead to deal with the failure risk of relay protection systems, It can better guarantee the reliability of relay protection system and improve the efficiency and safety of power supply. According to the related scientific research projects of Huainan Electric Power Company, the paper studies the operation data of relay protection equipment in detail, and analyzes the working parameters of the faulty equipment, aging equipment and decommissioned equipment. A relay protection risk assessment system is put forward by processing and statistics of a large amount of data. The system can simulate the failure rate of different types of relay protection equipment during operation, and on the basis of evaluating the operating environment of the equipment, it can give the current operation risk of the equipment, and guide the maintenance and repair of the equipment. In the algorithm, based on the three-parameter Weibull model, the paper selects the actual relay protection equipment operation parameters of a certain power company, including the basic information of the equipment, the operation situation of the equipment, the operation parameters of the equipment, the maintenance and maintenance record and so on. The failure rate model of relay protection equipment is obtained by using the least square method to fit the data, and after obtaining the trend function of equipment failure rate, the importance of equipment property and operation mode is obtained. Making the corresponding Markov model, selecting the model parameters with the minimum risk through the size of the pre-estimate of failure rate, evaluating the risk of current operation of the equipment, and evaluating the calculated value of the risk of the equipment. According to the relevant regulations and maintenance strategies of the power company, the corresponding strategies are given to guide the maintenance and repair of relay protection equipment. Finally, through the GUI interface system of Matlab, the software of the system is made, and the calculation results and evaluation quality of the paper are run and tested. The failure rate parameter quality and risk evaluation value of the equipment are also given. In the course of software operation, the corresponding risk evaluation value and maintenance strategy suggestions are obtained through the evaluation and calculation of the actual equipment in operation. The systematic research and the software production have played the theory support and the practical application effect to the related project.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM774
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