Study on Characteristics and Test Judgment of Electrical Fault of High-Voltage Equipment

Since the “big five,” the proposed large-scale planning and construction system of substations has seen rapid development, providing enough energy for people while also causing a series of problems, such as a gradual increase in radiation and magnetic fields. It not conducive to artificial operation, such as in case of frequent high-voltage electrical equipment failure, which again negatively influences the whole electric power system operation. Especially, the electrical failure of high-voltage equipment, if not found and solved in time, could cause a major power accident, bring economic losses to the power company, and even threatening the life safety of staff. None of these risks can be ignored. Based on this, in order to reduce the risk of substation accidents and to promptly discover and solve the problem of electrical failure in high-voltage equipment, this paper studies the substation in BX area as an example, by using the frequency response method, such as a low impedance of transformer for the winding deformation test. The winding has carried out with the handover testing and hoisting cover inspection With the collapse of the experiment, not only are the problems causing the fault found, the fault type and location are also determined. The feasibility of this method for detecting electrical faults of high-voltage equipment is confirmed, and the fault characteristics, location, and other information can be accurately judged, which provides support for the formulation of fault strategies in the later stage.

PDF

___

1. Y. Zhou, “Short circuit fault analysis and preventive countermeasure analysis of 10kV high voltage equipment,” Electr. World, vol. 2020, no. 12, pp. 74–75, 2020.
2. R. M. Wang, X. N. Zhang, Y. Meng and L. Yang, “Research on automatic fault monitoring of high voltage production equipment in power system,” Commun. Power Source Tech., vol. 37, no. 10, pp. 12–14, 2020.
3. J. Lu and Y. Wang, “Research on automatic electrical fault monitoring of high voltage production equipment in power system,” Autom. Instrum., vol. 2019, no. 7, pp. 66–69, 2019.
4. X. X. Dai, “Analysis of high voltage distribution equipment fault and countermeasures,” Shandong Ind. Tech., vol. 2019, no. 10, p. 210, 2019.
5. J. L. Dong, “Research on common faults of high voltage switching electrical equipment and treatment measures,” Low Carbon World, vol. 2018, no. 10, pp. 137–138, 2018.
6. D. Y. Li, “Analysis and solutions of abnormal detection of high voltage electrical equipment,” Commun. Power Sources Technol., vol. 37, no. 4, pp. 90–91, 2020.
7. D. W. Shi, Z. X. Wang, Q. B. Mao, D. Liu, S. F. Liu and X. Z. Gong, “Study on frequency response analysis of transformer winding deformation under 500kV bus electromagnetic interference,” Transformer, vol. 57, no. 8, pp. 49–51, 2020.
8. Y. M. Liu and L. H. Zhu, “Comprehensive diagnosis method of transformer winding deformation based on low voltage impedance and winding capacity,” New Ind., vol. 10, no. 2, pp. 1–5, 2020.
9. Z. Y. Zhou, Q. Liu, H. Liu, X. X. Liu and X. K. Zhang, “Frequency response analysis method for interference detection of power transformer winding deformation,” Electrotech. Eng., vol. 2021, no. 7, pp. 76–78, 2021.
10. Y. X. Li, “Application of oil chromatography in fault detection of power transformer,” Electr. Tech., vol. 50, no. 1, pp. 138–139, 2021.