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Data Object Modeling for Industrial Internet of Things and Its Efficient Implementation in a Cloud Test System for Relay Protection

Xiang Huang

Xiang Huang

State Grid Jiangsu Electric Power CompanyNanjing, China
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Huang, Xiang
, 
Beibei Qi

Beibei Qi

State Grid Jiangsu Electric Power Company Research InstituteNanjing, China
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Qi, Beibei
, 
Shuyi Zhuang

Shuyi Zhuang

State Grid Jiangsu Electric Power Company Research InstituteNanjing, China
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Zhuang, Shuyi
 e 
Chengzhi Yan

Chengzhi Yan

NARI Technology Nanjing Control System Co., Ltd.Nanjing, China
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Yan, Chengzhi
  
24 mar 2025
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Pubblicato online: 24 mar 2025
Ricevuto: 29 ott 2024
Accettato: 02 feb 2025
DOI: https://doi.org/10.2478/amns-2025-0779
Parole chiave
© 2025 Xiang Huang et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Figure 1.

Relay protection cloud test system framework
Relay protection cloud test system framework

Figure 2.

A schematic of protection
A schematic of protection

Figure 3.

Another schematic of protection
Another schematic of protection

Figure 4.

Based on RBF’s relay protection value check process
Based on RBF’s relay protection value check process

Figure 5.

Data object query performance
Data object query performance

Figure 6.

Comparison results of different methods
Comparison results of different methods

Figure 7.

Comparison results of different methods
Comparison results of different methods

Figure 8.

Local grid topology diagram
Local grid topology diagram

Figure 9.

Operation status information sample distribution
Operation status information sample distribution

Figure 10.

Automatic alarm result of the fixed value check
Automatic alarm result of the fixed value check

Figure 11.

The fixed value check model before and after the splicing
The fixed value check model before and after the splicing

Protection of relay protection equipment

Relay protection equipment I Protected value (Ω/s) II Protected value (Ω/s) III Protected value (Ω/s)
R1 32.45/0 66.65/1.53 75.64/3.68
R2 5.98/0 28.19/1.22 29.95/3.51
R3 5.31/0 26.48/1.21 27.92/3.43
R4 2.52/0 9.69/1.21 9.22/3.42
R5 2.43/0 9.66/1.23 9.18/3.47
R6 15.38/0 33.31/1.21 41.84/3.26
R7 18.46/0 35.39/1.02 45.93/3.21
R8 16.42/0 32.26/1.05 39.61/3.23
R9 24.31/0 40.03/0.94 47.39/3.15
R10 28.22/0 43.19/0.95 43.72/3.16

The result of the fixed value check

Relay protection equipment Desired mode of operation Critical value (Ω) Actual check value (Ω) Check result
R1 L1 Stop 115.28 62 Meet the selective demand
R2 C2 Primary stop 120.42 62 Meet the selective demand
R3 C2 Primary stop 120.19 62 Meet the selective demand
R4 L7 Hang check 233.58 62 Meet the selective demand
R5 L9 Hang check 59.86 62 Match with III line, Mismatch selection
R6 C5 Primary stop 58.32 62 Match with III line, Mismatch selection
R7 C5 Primary stop 36.64 62 Match with III line, Mismatch selection
R8 L15 Hang check 110.35 62 Meet the selective demand
R9 L16 Hang check 106.57 62 Meet the selective demand
R10 L19 Stop 88.97 62 Meet the selective demand

Short circuit current results for different models

Fault position Operation mode Fault phase current/standard value-Before Fault phase current/standard value-After Percentage difference (%)
SPF TPF SPF TPF SPF TPF
BGS Big 9.028 9.916 9.483 10.443 5.04 5.31
Small 8.746 9.585 9.176 10.089 4.92 5.26
JJL Big 8.342 9.442 8.654 9.785 3.74 3.63
Small 7.813 9.037 8.084 9.283 3.47 2.72
DBJ Big 13.024 13.751 13.121 13.784 0.74 0.24
Small 12.251 12.943 12.364 12.995 0.92 0.40
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