绝缘子预期电荷Q_(50)的计算

Calculation of Insulator Expected Charge Q_(50)

绝缘子作为电力系统的重要部件,当长期在直流环境工作时,其绝缘内部将发生离子迁移,致使其绝缘性能降低,严重时会引发电力系统故障。因此,绝缘子出厂产品需要通过老化试验等一系列试验验证其绝缘性能,在此之前,需要计算其预期电荷量。该文针对现有标准绝缘子预期电荷计算公式值得探讨之处,重新基于微积分原理分析了绝缘子预期电荷量的定义与计算公式,提出了基于Matlab的数值计算方法,并进行了验证,得到了一组绝缘子预期电荷量较为精确的计算结果,为后续绝缘子老化机理的进一步理论分析和老化试验提供了重要参考。

Insulator,is an essential instrument in electrical power system.When insulator works under DC environment,Its inside will exist ions migration,which causes its insulant performance degradation.In this consideration,a series of tests are required for each insulator product,such as aging test,and before all these tests,expected charge is required to get calculated.The definition and calculation of insulator expected charge have been analyzed in this paper,as the equations on available standard are insufficient.A modified equation and its numeric calculation have been demonstrated and realized in Matlab,and then,proceeded and proved,getting a set of much precise results.This paper provides essential references for further insulator aging mechanism and test.