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文章摘要
用电信息采集设备可靠性验证试验
Reliability Compliance Test for Electrical Energy Data Acquisition Equipments
Received:February 20, 2014  Revised:February 20, 2014
DOI:
中文关键词: 用电信息采集设备  可靠性验证  加速寿命试验  Peck模型  威布尔分布
英文关键词: electrical  energy data  acquisition equipment, reliability  compliance, accelerated  life testing, Peck  model, Weibull  distribution
基金项目:国家电网总部科技项目,中国电力科学研究院创新基金
Author NameAffiliationE-mail
SHEN Li-juan China Electric Power Research Institute shenlijuan@126.com 
LIU Xuan China Electric Power Research Institute  
Liu Yan* China Electric Power Research Institute yanliu3@epri.sgcc.com.cn 
DONG Li-jun China Electric Power Research Institute  
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中文摘要:
      在用电信息采集系统建设中,为实现“全覆盖、全采集、全费控”的目标,确保电能数据的安全和完整,要求采集设备具有很高的可靠性。针对采集设备多应力和多失效模式的情形,提出采集设备可靠性验证试验方法。建立采集设备的可靠性串联模型,给出失效模式和失效判据;开展温湿度恒定应力加速寿命试验,确定试验应力水平、样本量、加速模型、最小试验时间、试验终止时间和试验方法;基于最小二乘法估计多个失效模式在各组应力水平下的寿命分布参数,推导出使用条件下采集设备的累积失效分布;验证某批配变终端5年时的可靠度为0.8403,不满足失效概率≤10%的要求。
英文摘要:
      During the construction of electrical energy data acquisition system, to achieve full acquisition of the data and ensure the security and integrity of the data, acquisition equipments are required to be highly reliable under different operating environments. In order to verify whether the reliability of acquisition equipments meets the industrial requirement, reliability compliance test needs to be carried out. The purpose of this work is to develop reliability compliance test methods for acquisition equipments with multiple stress factors and multiple failure modes. Firstly, reliability model of acquisition equipments was established, which is a series model. Any functional unit fails, the acquisition equipment will fail. Failure criteria and main failure modes were given. Then, to shorten the time and reduce the cost, temperature and humidity accelerated life testing was performed, using time curtailed test. The stress levels, sample numbers, accelerated model, the minimum test time and test method were determined. Finally, for each stress level and each failure mode, the parameters of life distribution were estimated by regression; each failure time was extrapolated to normal use condition, and the parameters of life distribution under normal use condition were estimated; the cumulative distribution and the life characteristics of acquisition equipments can be derived. Reliability compliance test had been performed for 48 acquisition equipments, and the result shows that the reliability is 0.8403 after 5 years, not meeting the requirement with reliability 0.9.
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