Temperature Detection Sensor System for Power Transmission Lines

Abstract

The invention provides a power transmission line-oriented temperature detection sensor system, comprising a power transmission line, a screw, a microband antenna, an insulation layer, a metal heat conduction part, a thermal insulation part and multiple sensors; the sensors arranged in a metal shell of the power transmission line are connected with the line core of the power transmission line by the metal heat conduction part and are connected with the metal shell of the power transmission line by the thermal insulation part; the microband antenna is connected to the outer side of the metal shell of the power transmission line by the screw; the insulation layer is arranged between the microband antenna and the metal shell of the power transmission line. A long-distance, multi-point connection and antijamming surface acoustic wave wireless sensor method solves the distance effect of a code division multiplexing coding passive sensor system, and can meet the demand of an intelligent power grid on the wireless monitoring on the temperature of power equipment.

Description

technical field [0001] The invention relates to the field of temperature monitoring of power equipment, in particular to a temperature detection sensor system for power transmission lines. Background technique [0002] Among the many monitoring quantities of power equipment status monitoring, temperature is one of the most critical detection quantities. Through temperature monitoring, the operating status and fault information of power equipment can be understood in a timely and accurate manner. Monitoring the operating temperature of power equipment, such as the oil temperature of transformers, and the conductor temperature of transmission lines (overhead lines and power cables) can be used to calculate the load limit capacity and equipment aging degree, thereby providing a basis for dynamic capacity increase or maintenance of power equipment. Monitor the temperature of the stator and rotor of the generator, high-voltage switchgear, busbar joints, outdoor knife switch, cir...

AI Technical Summary

Problems solved by technology

[0005] However, the currently developed SAW wireless sensor array cannot fully meet the temperature monitoring requirements in smart grid and UHV applications, and the problems mainly include:

[0006] Problem 1: The working distance is not enough

[0007] Problem 2: The number of temperature points detected at the same time is not enough

[0008] Question 3: The anti-interference performance of the sensor needs to be improved

However, due to the limitation of the applicable wireless bandwidth and the length of the SAW substrate material, it is difficult to realize 8 types of piezoelectric substrates on a 10 mm long piezoelectric substrate (which is the limit, and the SAW propagation loss and diffraction loss will be unacceptably large any longer). The above sensor types

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