Improving the Reliability of Relay-Protection and Automatic Systems of Electric-Power Stations and Substations

Gryzlov, A. A.; Григорьев, М. А.

doi:10.3103/s1068371218040077

Cited by 51 publications

(5 citation statements)

References 1 publication

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“…After a light gas alarm is triggered, workers need to sample and test the gas while the transformer is in operation, a process that poses safety risks [ 26 ]. This is because the transformer’s operating condition may rapidly deteriorate during gas extraction, potentially leading to explosions and fires, posing a threat to the safety of the workers.…”

Section: Principle Of Operation Of the Etwsdmentioning

confidence: 99%

Transformer Monitoring with Electromagnetic Energy Transmission and Wireless Sensing

Xu,

Shang,

et al. 2024

Sensors

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To ensure stable and normal transformer operation, light gas protection of the transformer Buchholz relay is essential. However, false alarms related to light gas protection are common, and troubleshooting them often requires on-site gas sampling by personnel. During this time, the transformer’s operating state may rapidly deteriorate, posing a safety threat to field staff. To tackle these challenges, this work presents the near-field, thin-sliced transformer monitoring system that uses Electromagnetic Energy Transmission and Wireless Sensing Device (ETWSD). The system leverages external wireless energy input to power gas monitoring sensors. Simultaneously, it employs Near-Field Communication to obtain real-time concentrations of light gases, along with the electrified state and temperature. In field testing conducted on transformer relays’ gas collection chambers, the ETWSD effortlessly monitors parameters within warning ranges, encompassing methane gas concentrations around 1000 ppm, leakage voltage ranging from 0–100 V, and relay working temperatures up to 90 °C. Additionally, to facilitate real-time diagnosis for electrical workers, we have developed an Android-based APP software that displays current light gas concentrations, leakage voltage collection values, and temperature, while also enabling threshold judgment, alarms, and data storage. The developed ETWSD is expected to aid on-site personnel in promptly and accurately evaluating transformer light gas protection error alarm faults. It provides a method for simultaneous, contactless, and rapid monitoring of multiple indicators.

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Section: Principle Of Operation Of the Etwsdmentioning

confidence: 99%

Transformer Monitoring with Electromagnetic Energy Transmission and Wireless Sensing

Xu,

Shang,

et al. 2024

Sensors

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“…Natural cooling without special advantage is that the duct, no noise; disadvantage is the low efficiency of heat dissipation, heat transfer coefficient α is 6~13 kcal/hm 2 K. It is only suitable for high current devices smaller device or simply the rated current. It is noteworthy that when the gap between the components is less than 3 mm, almost stopped natural-convection, conduction and radiation heat will be the main mode [9]. Secondly, forced air cooling.…”

Section: Cooling Treatmentmentioning

confidence: 99%

Research on thermal design control and optimization of relay protection and automation equipment

2020

THERM SCI

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Relay protection devices and power automation systems are an important product in the power equipment manufacturing industry. They are customarily divided into secondary equipment for the transmission and distribution industry, and are responsible for protecting and controlling the primary equipment of the power grid and measuring the load of the power grid system. Thermal design is a major research topic for the reliability study of relay protection devices. The paper introduces the thermal design process of the relay protection device processing equipment, from the single-chip, module level, etc. to construct and isolate the airway facilities, and uses the FLOTHERM software to simulate the relay protection device model. Thermal simulation can guide the structural design, optimize the structure, make the single-machine structure more reasonable, and the heat dissipation more effective, improving the reliability of the single machine.

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“…Automated maintenance systems for high-voltage equipment in power systems have become increasingly popular due to the high technical requirements and danger involved in traditional manual methods [1] . Visual inspection technology, particularly neural network-based methods, have been developed for automatic detection of high-voltage switches (HVS).…”

Section: Introductionmentioning

confidence: 99%

“…We photographed four types of HVS, namely Drop-out Fuse (DF), Isolating Switch (IS), Circuit Breaker (CB), and Indicator for Circuit Breaker (ICB), each with two states: off (0) and on(1). The dataset includes a total of 3765 images of the eight aforementioned states, namely DF-off (DF0), DF-on (DF1), IS-off (IS0), IS-on (IS1), CB-off (CB0), CB-on (CB1), ICB-off (ICB0), and ICB-on (ICB1), as shown in Figure3.…”

mentioning

confidence: 99%

Feature Selector: an effective module for robust high-voltage switchgear detection

Chen,

Xie,

Zhang

et al. 2023

Second International Conference on Electronic Information Technology (EIT 2023)

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This study proposes a feature extraction module named Feature Selector to enhance the generalization performance of neural networks for state detection of High-Voltage Switchgear (HVS) in outdoor environments. This module comprises three autonomous feature extractors, each intended for extracting distinct types of features, and a switch employed for choosing appropriate features for subsequent propagation. Experimental results on testing sets in three different environments demonstrate that the module effectively improves the generalization performance of the YOLOv5-nano (You Only Look Once) network.

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Improving the Reliability of Relay-Protection and Automatic Systems of Electric-Power Stations and Substations

Cited by 51 publications

References 1 publication

Transformer Monitoring with Electromagnetic Energy Transmission and Wireless Sensing

Transformer Monitoring with Electromagnetic Energy Transmission and Wireless Sensing

Research on thermal design control and optimization of relay protection and automation equipment

Feature Selector: an effective module for robust high-voltage switchgear detection

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