Research on Electrical Equipment Big Data Mobile Laboratory Based on Power Grid Cloud Data Management and Its Application

doi:10.12096/j.2096-4528.pgt.22125

Abstract

Abstract:

Aiming at the problems of low efficiency, low level of intelligent operation and low level of data informatization application encountered in the current substation equipment test operation, a mobile laboratory platform based on grid cloud data management was developed. This paper focused on the theoretical process of the result judgment of the expert analysis system embedded in the mobile laboratory platform. Combined with the practical application cases of transformer differential protection after operation, according to the test results of low-voltage short-circuit impedance method, capacitance method, frequency response characteristic method, transformation ratio and direct resistance test, the reliability of the embedded expert analysis system to analyze the winding deformation caused by the short circuit impact of the transformer was illustrated. Finally, according to the results of the dismantling inspection after returning to the factory, the validity of the platform in the field application was further verified.

Key words: power system, substation, transformer, mobile laboratory, cloud data, winding deformation

CLC Number:

TK 01

Hao WU, Xiao XU, Zinan PENG, Ninghui GUO, Qifeng WANG. Research on Electrical Equipment Big Data Mobile Laboratory Based on Power Grid Cloud Data Management and Its Application[J]. Power Generation Technology, 2023, 44(3): 417-424.

Figures/Tables 15

References 18

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采样日期	油样成分体积比/(μL/L)
采样日期	H₂	CO	CO₂	CH₄	C₂H₄	C₂H₆	C₂H₂	总烃
2019/3/18	2.36	1 357.75	6 410.84	24.29	12.31	4.61	0	41.31
2020/5/11	1.94	1 543.65	6 014.74	23.29	11.97	3.71	0	38.97
2021/3/23	1.75	1 440.24	5 807.93	22.61	12.42	3.84	0	38.87
2021/8/5	42.45	1 456.65	7 047.95	36.31	33.49	5.83	40.5	116.16

采样日期	油样成分体积比/(μL/L)
采样日期	H₂	CO	CO₂	CH₄	C₂H₄	C₂H₆	C₂H₂	总烃
2019/3/18	2.36	1 357.75	6 410.84	24.29	12.31	4.61	0	41.31
2020/5/11	1.94	1 543.65	6 014.74	23.29	11.97	3.71	0	38.97
2021/3/23	1.75	1 440.24	5 807.93	22.61	12.42	3.84	0	38.87
2021/8/5	42.45	1 456.65	7 047.95	36.31	33.49	5.83	40.5	116.16

测量位置	2021/8/6(故障后)		1999/10/23(出厂)		△C_x/%
测量位置	tanδ/%	C_x/pF	tanδ/%	C_x0/pF	△C_x/%
高压对中、低压及地(C_H)	0.212	11 120	0.26	11 460	2.97
中压对高、低压及地(C_M)	0.295	19 020	0.26	17 620	7.94
低压对高、中压及地(C_L)	0.336	19 850	0.61	18 240	8.83
高、中压对低压及地(C_HM)	0.320	14 950	0.27	8 489	76.1
高、中、低压对地(C_HML)	0.267	15 350	0.71	15 460	0.71

测量位置	2021/8/6(故障后)		1999/10/23(出厂)		△C_x/%
测量位置	tanδ/%	C_x/pF	tanδ/%	C_x0/pF	△C_x/%
高压对中、低压及地(C_H)	0.212	11 120	0.26	11 460	2.97
中压对高、低压及地(C_M)	0.295	19 020	0.26	17 620	7.94
低压对高、中压及地(C_L)	0.336	19 850	0.61	18 240	8.83
高、中压对低压及地(C_HM)	0.320	14 950	0.27	8 489	76.1
高、中、低压对地(C_HML)	0.267	15 350	0.71	15 460	0.71

电容量分解值	1999/10/23(出厂)	2021/8/6(故障后)	变化率/%
C₁/pF	1 164.5	3 525.0	202.7
C₂/pF	1 690.0	1 700.0	0.59
C₃/pF	12 605.5	10 125.0	-19.7
C₄/pF	10 295.5	7 595.0	-26.2
C₅/pF	5 634.5	9 725.0	72.6