摘要
变压器是电力系统的枢纽设备,其运行的可靠性直接关系着电力系统的安全运行。为此,提出了一种基于色谱数据统计规律的变压器可靠度评估方法。首先对正常状态以及过热和放电异常状态时变压器的油色谱数据进行分布规律分析,采取曲线拟合的方式求取各状态下气体含量的概率密度函数以及累积分布函数。根据异常状态时数据的分布规律,利用变压器的可靠性与故障的累计概率之间的关系,得出各气体含量达到国标注意值时变压器的可靠度。最后按照国家安全预警体系将变压器异常状态划分为5个严重等级。
The transformer is the key apparatus in electric power system.Its reliability directly affects the safe operation of power system.Therefore,a reliability evaluation method for transformer based on the statistical regularities of the gas chromatography data of transformers is proposed.Firstly,by analyzing the distribution rule of the gas chromatography data of transformers under normal condition and the gas chromatography data of discharge and overheat faults,the probability density function and the cumulative distribution function of the gas content in different conditions were obtained by curve-fitting method.Secondly,according to the distribution rule of the gas chromatography data of discharge and overheat faults,the transformer reliability when each gas content reached the attention value of GB was obtained using the relationship between the reliability and the cumulative probability of the failure of the transformer.Finally,according to the national security warning system,fault condition of transformers can be divided into five grades.
出处
《电力科学与工程》
2013年第7期1-6,共6页
Electric Power Science and Engineering
基金
国家重点基础研究发展计划项目(973计划)(2009CB724508)
关键词
变压器
气相色谱分析
正常状态
故障
可靠度
transformer
dissolved gas analysis
normal condition
fault condition
reliability
