Research of on-line monitoring method for insulation condition of power transformer bushing

Jiuyun Xia; Zheng Qian; Hao Yu; Junda Yao

doi:10.1117/12.2214134

26 January 2016 Research of on-line monitoring method for insulation condition of power transformer bushing

Jiuyun Xia, Zheng Qian, Hao Yu, Junda Yao

Proceedings Volume 9903, Seventh International Symposium on Precision Mechanical Measurements; 99031T (2016) https://doi.org/10.1117/12.2214134
Event: Seventh International Symposium on Precision Mechanical Measurements, 2015, Xia'men, China

Abstract

The power transformer is the key equipment of the power system; its insulation condition will directly influence the security and reliability of the power system. Thus, the on-line monitoring of power transformer is urgently required in order to guarantee the normal operation of the power system. Moreover, the dielectric loss factor is a significant parameter reflecting the condition of transformer bushing, so the on-line measurement of dielectric loss factor is really important. In this paper, the phase-to-phase comparison method is selected as the on-line monitoring method based on the overall analysis and discussion of the existing on-line monitoring methods. At first, the harmonic analysis method is utilized to calculate the dielectric loss of each phase of the three-phase transformer bushing, and then the differences of dielectric loss between every two phases are calculated and analyzed. So the insulation condition of each bushing could be achieved based on the careful analysis of different phase-to-phase dielectric loss. The simulation results of phase-to-phase comparison method are carried out in this paper, and the validity is verified. At last, this method is utilized in an actual equipment of on-line monitoring.

Citation Download Citation

Jiuyun Xia, Zheng Qian, Hao Yu, and Junda Yao "Research of on-line monitoring method for insulation condition of power transformer bushing", Proc. SPIE 9903, Seventh International Symposium on Precision Mechanical Measurements, 99031T (26 January 2016); https://doi.org/10.1117/12.2214134

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