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A Temperature-measuring System of Electric Facility Based on Wireless Communication Technique

Author: GanHong
Tutor: ZhouNianChengï¼›LuoChunLei
School: Chongqing University
Course: Electrical Engineering
Keywords: Infrared communications RF communication Online testing Temperature measurement ATmega8 microcontroller High voltage electrical equipment
CLC: TM76
Type: Master's thesis
Year: 2007
Downloads: 324
Quote: 1
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Abstract


With the development of the national economy, the electricity consumption continued to increase, due to the high temperature caused by high-voltage electrical equipment safety incidents have occurred. The external thermal failure of electrical equipment mainly refers to the joints due to reasons such as poor crimping, in the role of high-current, contact resistance increases, the joint temperature rises. Electrical equipment external thermal fault if they can not discover and deal with, would pose a security risk. Energized high voltage electrical equipment running with a high voltage (10kV and above), can not be detected using traditional low voltage contact and non-contact detection of the temperature of the high-pressure operating equipment, such as infrared thermometers and infrared imaging measurements temperature instruments. The infrared thermometer easy to use, but only by the operating personnel on a regular basis to the equipment near detection can not be detected in real time. Temperature thermal imaging infrared camera using different color different from non-contact temperature measurement, but the the infrared camera high price, mainly used for large transformers and other important equipment. With the development of power system automation technology, substation gradually implement unattended, the need for online monitoring the external temperature of the electrical equipment. In this paper, for real-time detection of the surface temperature of the high-voltage electrical equipment, design a contact with high-voltage electrical equipment temperature detection device based on wireless communication. The apparatus provided by the temperature detection circuit, the hibernation wake-up circuit, power supply circuit, a communication transceiver module. Temperature logger and The DS18B20 constitutes the temperature acquisition circuit, can accurately measure the temperature of the isolation switch, high voltage cable connectors, high voltage switchgear, etc.. Micro-power microprocessor acquisition, calculation and judgment, and real-time temperature data is transmitted to the receiving device by way of wireless communications. Indoor equipment using infrared transmission mode, with a battery-powered; outdoor equipment uses RF wireless communication, use of solar power. Designed to reduce power consumption, a timing circuit timing wakes up, processing is completed automatically enter the sleep state to extend battery-powered time. This device has a micro-power, high reliability, good real-time monitoring, etc., to solve the problem of the direct contact line temperature monitoring of high voltage electrical equipment, can accurately and timely report the temperature of the high-voltage equipment connector to ensure the security of electricity supply . The system has been put into actual operation, the results show that the detection method has a good real-time performance and reliability.

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CLC: > Industrial Technology > Electrotechnical > Transmission and distribution engineering, power network and power system > Power system automation
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