High pressure cable and its accessory conductor temperature measuring method
A technology for conductor temperature and high-voltage cables, which is applied to thermometers, measuring devices, and heat measurement. It can solve the problems that the temperature of cable conductors cannot be directly measured, and achieve the effects of simple thermal partial discharge measurement test, improved accuracy and real-time performance.
Active Publication Date: 2008-02-20
XIAN HIGH VOLTAGE APP RES INST CO LTD
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Problems solved by technology
[0003] Aiming at the defect that the cable conductor temperature cannot be directly measured in the existing thermocouple method, the present invention provides a method for measuring the conductor temperature of cables and cable accessories based on high-voltage live state
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[0010] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0011] This embodiment can be adopted in the load cycle test of cables and cable accessories. The load cycle test is divided into two cases in air and in water. The load cycle test in the air is for most cable accessories, and the load cycle test in water is mainly for various separable connector plugs and non-separable connector plugs. This test evaluates the performance of the organic insulation and metal conductor of the cable sample after dozens of cycles (single cycle: apply a large current to make the temperature rise sharply, keep it at the highest temperature for two hours, and then make the temperature drop rapidly, and at the same time Apply 2.5 times the operating voltage to the test sample). This test is very strict for the assessment of cables and cable accessories.
[0012] As shown in Figure 1, install and set up the tested c...
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The utility model provides a method of measuring the temperature of cable and cable accessories in the state of high-voltage charge, aiming at solving the defect of the prior thermal couple method which cannot measure the temperature of cable conductors directly. The utility model is characterized in that cable and cable accessories are positioned first, then a rising current connection cable used to connect heating current is arranged and two segments of thermometric cables are connected between the two ends of the measured cable and the two ends of the rising current connection cable to form a load circulation test loop; the thermometric cables are the cables of the same model as the measured cable and an optical fiber measuring device is arranged at one end of the thermometric cables so as to connect the optical fiber measuring device with computer terminal. The utility model has the advantages of adopting the special-purpose thermometric cables used to connect the tested cable and cable accessories, being provided with an optical fiber thermometric probe therein, and achieving precise measurement of the temperature of cable conductors and real-time temperature monitoring in the state of high-current and high-voltage.
Description
technical field [0001] The invention relates to a method for measuring high-voltage cables and cable accessories, in particular to a method for measuring the temperature of the conductors of high-voltage cables and accessories. Background technique: [0002] In the power system, as a large number of cables and cable accessories are directly applied to switches and cable distribution boxes, the problems after cables and cable accessories are connected to switches have gradually become prominent. The cable is organically insulated. After a few seconds after the switch is short-circuited, the temperature of the conductor inside the cable can reach hundreds of degrees Celsius. In the prior art, the test of cables and cable accessories uses the thermocouple method to measure the conductor temperature. The indirect method of estimation cannot realize the accurate measurement of the conductor temperature under the high-voltage live circuit, and lacks the real-time monitoring of the...
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IPC IPC(8): G01K11/32
Inventor 李政于永明陆建挺贾涛
Owner XIAN HIGH VOLTAGE APP RES INST CO LTD