电桥型绝缘油介质损耗测试仪的校验方法研究

Study on Calibration Method of Electric Bridge Insulating Oil Dielectric Loss Tester

摘要:

绝缘油介质损耗是电力系统开展绝缘油质量监督的一项重要指标。电力系统使用的绝缘油介质损耗测试仪 大部分采用西林电桥的原理制成。由于目前没有标准方法和标准物质对电桥型绝缘油介质损耗测试仪的准确性进 行校验，导致使用准确性不满足要求的仪器进行测试的情况时有发生，测量结果的准确性也无法保证。为解决该问 题，研制了一种绝缘油介质损耗校验装置作为标准物质，通过间接法研究了电桥型绝缘油介质损耗测试仪的校验方 法。最后结合实例对两种典型的电桥型绝缘油介质损耗测试仪进行校验，结果表明测量值与示值一致，从而保证了 绝缘油介质损耗测试数据的准确性。

Abstract:

The dielectric loss of insulating oil is an important index for the quality supervision of power system． The insulating oil dielectric loss tester used in power system is mainly made of Schering bridge． Because there is no standard method to check the accuracy of insulating oil dielectric loss tester，it results in the instruments whose accuracy does not meet the requirements to carry out the test，and the accuracy of measurement results also cannot be guaranteed． In order to solve the problem，an insulating oil dielectric loss calibration device is developed as the standard material，and the calibration method for electric bridge insulating oil dielectric loss tester is studied through indirect method． Finally combining with the calibration examples of two typical electric bridge insulating oil dielectric loss testers，the results show that the measured value is consistent with the indicating value so as to ensure the accuracy of insulating oil dielectric loss test data．