scholarly journals Design of Distributed Substation High Voltage Electrical Equipment Online Monitoring System Based on Image Segmentation Technology

2021 ◽  
Vol 2143 (1) ◽  
pp. 012001
Author(s):  
Mingzhong Lin ◽  
Lei Fu ◽  
Fanxing Zeng ◽  
Guang Yang ◽  
Ming Sun
Keyword(s):  
High Voltage ◽  
Online Monitoring ◽  
Monitoring Network ◽  
Electrical Equipment ◽  
Quality Parameters ◽  
National Standard ◽  
Design System ◽  
Support Mechanism ◽  
Voltage Unbalance ◽  
Unbalance Voltage

Abstract As an important support mechanism for real-time monitoring and display of system frequency, harmonic voltage, harmonic current, three-phase voltage unbalance, voltage fluctuation and flicker, true power factor and other power quality parameters specified in national standard, especially for fast and accurate data processing and improving test frequency and level, the online monitoring of substation is an important support mechanism for real-time monitoring and display of system frequency, harmonic voltage, harmonic current, three-phase voltage unbalance, voltage fluctuation and flicker, true power factor and other power quality parameters specified in national standard. The research of distributed substation high voltage electrical equipment online system based on image segmentation has important practical value. However, the design system of the online monitoring network of some substation electrical equipment can not effectively follow the development needs of society and industry, and there is an urgent need for effective reform. Based on this, this paper first analyzes the problems existing in the design system construction of online monitoring network of distributed substation electrical equipment, and then gives the construction strategy of online monitoring system of high voltage electrical equipment in view of these problems.

Design of the System for Online Monitoring Dielectric Loss

2012 ◽  
Vol 472-475 ◽  
pp. 1568-1571
Author(s):  
Jian Feng Zheng ◽  
Hao Qiang
Keyword(s):  
Dielectric Loss ◽  
Monitoring System ◽  
High Voltage ◽  
Online Monitoring ◽  
Electrical Equipment ◽  
Comparison Method ◽  
Zero Crossing ◽  
Transformer Substation ◽  
Online Monitoring System ◽  
Upper Computer

For knowing the dielectric loss of high-voltage capacitive electrical equipment timely and mastering the electrical insulation of high voltage equipment effectively to ensure the reliable operation of these voltage equipments, an online monitoring system is designed in this paper based on the practical project. The system is made up of two parts including lower computer and upper computer. Using the microcontroller C8051F023 as the core of the lower computer and adopting an improved zero-crossing comparison method, the measurement of dielectric loss is realized and the data are sent to upper computer by wireless way. SQL2000 is used in the upper computer for data management, which can be real-time displayed, inquired and printed in report forms. At present, this monitoring system has successfully applied in the Houqiao 330 kV transformer substation in Ningxia. The operating results show that the system can meet well the online monitoring demand of the high voltage capacitive electrical equipment.

scholarly journals Sistem Proteksi Motor Induksi 3 Fasa Terhadap Bermacam Gangguan Menggunakan Mikrokontroller

2020 ◽  
Vol 10 (1) ◽  
pp. 9-17
Author(s):  
Darmawansyah Darmawansyah ◽  
M Khairul Amri Rosa ◽  
Ika Novia Anggraini
Keyword(s):  
Distribution System ◽  
Induction Motors ◽  
Electrical Equipment ◽  
Electric Power System ◽  
Protection System ◽  
Voltage Unbalance ◽  
Current Voltage ◽  
Three Phase ◽  
Unbalanced Voltage ◽  
Unbalance Voltage

ABSTRACTIn the current era of globalization, various human jobs depend on electrical equipment such as three-phase induction motors. Three-phase induction motors are very important to use according to their roles and functions. The occurrence of voltage variations in the electric power system is due to the magnitude of the voltages between the three phases which are not the same so that there are differences in the angle of the R, S and T phases, which causes an uneven load overload in the electrical distribution system. Among the disturbances that can occur are overvoltage, under voltage, unbalance voltage between phases, overload, and overheating. Based on these problems, a three-phase induction motor protection system was designed, the system uses current, voltage, temperature sensors, which functions to measure the value when a disturbance occurs, a magnetic contactor as a breaker and a liaison when the disturbance is given in accordance with the set point value given to the microcontroller. The results of the research for unbalanced voltage of V1 112 V, V2 114 V, V3 108 V, overvoltage of V1 228 V, V2 207 V, V3 264 V, over current of A1 104 A, A2 107 A, A3 0.77 A , the overload on the resistance source is 333 ?, 250 ?, 200 ?, 167 ?, and the overheating is 40.75 ºC at 6.5 minutes with tripping conditions in each test. The final results of this study indicate that the protection system which is designed is better used for three-phase induction motors.Keywords: unbalaced, disturbances, protection systems, sensors, magnetic contactor, microcontroller.

Research on Monitoring System of Environment in Switchgear

2013 ◽  
Vol 310 ◽  
pp. 560-563
Author(s):  
Jun Hao Niu ◽  
Cong Hu ◽  
Xian Hua Yin
Keyword(s):  
Web Service ◽  
High Voltage ◽  
Communication Channel ◽  
Humidity Sensor ◽  
Online Monitoring ◽  
Electrical Equipment ◽  
Environment Monitoring ◽  
Exchange Information ◽  
On Line ◽  
Humidity Environment

When high voltage electrical equipment running in electrical transformer station, heating, electrical accident would be caused by some factors, for example, the temperature of switch node higher then alarm, discharge with high humidity, condensation of electrical equipment. Therefore, the implementation on-line monitoring for high voltage electrical equipment has become the important problem needed to solve. This paper analyzes the effect of node temperature and the humidity in the switchgear failure, and designs temperature/humidity environment monitoring terminal with low power controller and integrated temperature/humidity sensor. The RS485 interface is used as the communication channel to exchange information with monitor server. In monitor computer, a server is working to collect real time environment information from each terminal and provides web service for user in internet. Experimental results show that this system can realize the contact temperature and humidity environment online monitoring, display, alarm and other functions, and has good scalability and maintainability.

scholarly journals Device for online monitoring of insulation faults in high-voltage switchgears

2021 ◽  
Vol 17 (2) ◽  
pp. 155014772199928
Author(s):  
Jiajia Song ◽  
Jinbo Zhang ◽  
Xinnan Fan
Keyword(s):  
Fourier Transform ◽  
High Voltage ◽  
Online Monitoring ◽  
Pulse Current ◽  
Partial Discharge ◽  
Current Method ◽  
Capacitive Sensor ◽  
Accurate Diagnosis ◽  
Partial Discharges ◽  
Urgent Problem

Partial discharges are the major cause of deterioration in the insulation characteristics of switchgears. Therefore, timely detection of partial discharge in switchgear and potential insulation faults is an urgent problem that needs to be addressed in the power supervision industry. In this study, a device was proposed for online monitoring of high-voltage switchgears based on pulse current method and ozone (O3) detection. The pulse current method obtains the PD signal by monitoring the phase holes on the switch indicator. Occurrence of a partial discharge in a certain phase leads to the production of a discharge pulse, which can be coupled out by a capacitive sensor. The current spectrum and the O3 produced by partial discharge were processed via fast Fourier transform for accurate diagnosis of the occurrence of partial discharge and its severity in switchgears. The proposed method allows for convenient acquisition of the partial discharge signal, simple installation of the device, and realization with inexpensive sensors.

Site validation for radiated field measurements of high-voltage/large-capacity electrical equipment

2021 ◽  
Author(s):  
Shinobu Ishigami ◽  
Tatsuru Itsukaichi ◽  
Ken Kawamata ◽  
Yasutoshi Yoshioka
Keyword(s):  
High Voltage ◽  
Field Measurements ◽  
Electrical Equipment ◽  
Large Capacity

scholarly journals Time Synchronization and Communication Program of Wireless Sensor Network for Online Monitoring of Electrical Equipment

2017 ◽  
Vol 13 (07) ◽  
pp. 36
Author(s):  
Yuxia Shen
Keyword(s):  
Operating System ◽  
Wireless Sensor Networks ◽  
Wireless Sensor Network ◽  
Sensor Networks ◽  
Sensor Network ◽  
Online Monitoring ◽  
Time Synchronization ◽  
Electrical Equipment ◽  
Wireless Sensor ◽  
Zigbee Protocol

<p><span style="font-size: medium;"><span style="font-family: 宋体;">In wireless sensor networks, for improving the time synchronization perfromance of online monitoring and application of ZigBee protocol, a scheme is designed. For this objective, first of all, the ZigBee protocol specification is summarized, a profound analysis of the hardware abstraction architecture of TinyOS operating system is made; the advantages of the ZigBee protocol compared with the traditional radio technology are comparatively analyzed. At the same time, the node design block diagram based on CC2430 and related development system is provided. In the TinyOS2.x operating system, we analyze CC2430 application program abstract architecture, and on this basis, give the realization process of program design. The research results showed that we achieve an on-line monitoring system based on ZigBee protocol, which has realistic significance of applying ZigBee protocol in wireless sensor network of electrical equipment online monitoring. Based on the above research, it is concluded that the online monitoring system can collect the temperature parameters of the monitored object in real time that it can be widely applied in wireless sensor networks.</span></span></p>

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