3计量用低压电流互感器误差测量结果的不确定度评定-电测与仪表.DOC

计量用低压电流互感器自动化检定线的检定质量监控 周利华 （国网安徽省电力公司电力科学研究院，合肥 230601） 摘要：质量监控是检定（校准）实验室保证其检定（校准）的数据和结果准确可靠所采取的作业技术和活动。自动化检定流水线已广泛应用于省级电力计量中心的检定生产中，与传统人工检定台体相比，计量用低压电流互感器自动化检定线因二次端子接触不良等原因导致的检定质量风险更大，需要对其进行有效的检定质量监控。根据质量监控的一般方法，结合自动化检定线的特点，提出了基于检定误差限值倍数的监控判据和方法，并对其进行了实验验证，确保检定设备的可控、在控，检定结果的准确、可靠。 关键词：低压电流互感器；自动化检定；质量监控；测量不确定度 中图分类号：TM 文献标识码：B 文章编号：low-voltage current transformer automatic verification line Zhou Lihua (State Grid Anhui Electric Power Research Institute, Hefei 230601, Anhui, China) Abstract: Quality monitoring is a method and activities used by verification /calibration laboratories to ensure that its verification/calibration data and results are accurate and reliable. Automatic verification line has been widely used in verification production of provincial electric power metering center. However, verification quality risks caused by such as poor contact of secondary terminals in automatic verification line is bigger than traditional manual testing apparatus, so effective verification quality monitoring is necessary for low-voltage current transformer automatic verification line. According to the general methods for quality monitoring, this paper proposes a monitoring criterion and method based on multiple error limit of verified current transformer, and experimentally verified this criterion and method, which ensures test equipment is controllable and in control, and the test results are accurate and reliable. Keywords: low-voltage current transformer, automatic verification, quality monitoring, measurement uncertainty 0 引言 目前，自动化检定流水线已广泛应用于省级电力计量中心的检定生产中，低压电流互感器自动化检定线能实现对按照国网公司企业标准Q/GDW572-2010《计量用低压电流互感器》[1]制造的计量用低压电流互感器进行高效自动化检定，该标准对计量用低压电流互感器的型式进行了规范，二次绕组接线端子设置于互感器上部，便于使用压接装置实现对被检互感器的二次端子接线。由于低压电流互感器互感器尺寸存在公差，流水线的挡停和机械装置的压接定位也存在一定偏差，压接牢固程度也不如人工接线紧密、可靠，二次接线阻抗可能会影响到被检互感器的误差测量结果[2]。因此与人工检定台体相比，流水线因二次端子接触不好等原因导致检定质量的风险更大，需要对其进行有效的检定质量监控。 1 检定质量监控的对象 质量监控是检定/校准实验室保证其检定/校准的数据和结果准确可靠所采取的作业技术和活动。实质是通过使用特定的方法，对检定校准的结果是否准确、可靠进行实验验证，找出造成结果失准的因素，或者发现结果发展的趋势