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Method, device, equipment and readable storage medium for adjusting cable ampacity
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A technology for flow adjustment and current carrying capacity, which is applied in the fields of equipment and readable storage media, devices, and cable current carrying capacity adjustment methods.
Active Publication Date: 2021-01-26
GUANGDONG POWER GRID CO LTD +2
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[0003] However, this adjustment method assumes that the cable is in an ideal operating state, but in fact the ampacity of the cable is fluctuating rather than constant, and it is also affected by many factors. Therefore, the above method of calculating the ampacity is very restrictive. Evaluation The accuracy is low, making the adjustment of ampacity unable to fit the actual situation, affecting the normal operation of the cable
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Embodiment 1
[0057] Please refer to figure 1 , figure 1 A flow chart of the method for adjusting the cable ampacity provided in this embodiment; the method may include:
[0058] Step s110, obtaining the ampacity of the target cable, and using the obtained ampacity as a reference ampacity.
[0059] First select the target cable (the present invention is mainly based on the XLPE power cable), determine the specification, and obtain the cable reference ampacity I by actual measurement B , preferably, in order to simplify the implementation process, the ampacity of the target cable in the air domain can be obtained directly.
[0060] In addition, in this embodiment, the collection state is not limited, and the ampacity at room temperature can be obtained directly. In order to obtain the optimal reference ampacity, the effective value of the input current corresponding to the target cable when the conductor reaches 90°C can be obtained, and the The RMS value of the input current is used as t...
Embodiment 2
[0089] In order to deepen the understanding of the cable ampacity adjustment method provided by the present invention, this embodiment simulates XLPE power cables of known specifications under different laying methods, conducts thermal cycle treatment of cable samples and analyzes experiments on cable insulation performance, and evaluates The realization process of the ampacity of cables with different aging degrees under different laying methods is introduced as an example.
[0090] The target cable, that is, the test object is a spare cable, and the cable slice is sampled to obtain a cable slice sample with a thickness of 0.6mm; the research object is three common laying methods: direct burial laying, pipeline laying and tunnel laying; and the air laying method The ampacity is used as a reference ampacity, which is set to I B . The flow chart under this embodiment is shown as figure 2 Shown, specifically include the following steps:
[0098] Please refer to image 3 , image 3 The structural block diagram of the cable ampacity adjustment device provided for this embodiment; the device may include: a reference ampacity acquisition unit 210, a change standard determination unit 220, a thermal cycle test unit 230, an insulation performance analysis unit 240, and a flow fluctuation analysis unit 250 And the ampacity adjustment unit 260. The device for adjusting the ampacity of a cable provided in this embodiment can be compared with the method for adjusting the ampacity of a cable described above.
[0099] Wherein, the reference ampacity acquisition unit 210 is mainly used to obtain the ampacity of the target cable, and use the obtained ampacity as the reference ampacity;
[0100] The change standard determination unit 220 is mainly used to determine the temperature change data under different laying methods according to the reference ampacity;
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Abstract
The invention discloses a method for adjusting the current carrying capacity of a cable. The method comprises: acquiring the current carrying capacity of a target cable and using the obtained currentcarrying capacity as a reference currentcarrying capacity; according to the reference current carrying capacity, determining temperature change data of the target cable in a specified laying mode; onthe basis of a temperature change rule corresponding to the all specified laying modes, carrying out thermal cycle testing on cable insulation of the target cable; carrying out insulation performanceanalysis on the cable insulation after thermal cycle testing to obtain test insulation performance data; analyzing cable current carrying capacity fluctuation conditions under different laying modesbased on the test insulation performance data and original insulation performance data and generating cable current carrying capacity fluctuation data; and according to the cable current carrying capacity fluctuation data, adjusting the current carrying capacity of the target cable based on a preset adjusting rule. Therefore, the accuracy of the cable current-carrying capacity adjustment is improved. In addition, the invention also discloses an apparatus and equipment for adjusting the current carrying capacity of a cable and a readable storage medium, wherein the apparatus and equipment and the readable storage medium have the same beneficial effects.
Description
technical field [0001] The invention relates to the technical field of cross-linked polyethylene cable insulation heat cycle, in particular to a method, device, equipment and readable storage medium for adjusting the ampacity of a cable. Background technique [0002] When calculating the current carrying capacity of cables, domestic and foreign standards generally take into account the influence of the laying method on the current carrying capacity on the basis of the basic current carrying capacity. The basic method followed is to use room temperature as the initial temperature, and the long-term normal operating temperature of the cable is 90°C. As the final steady-state temperature, the corresponding maximum current is obtained through the thermal circuit method, simulationsoftware, etc., and adjusted according to the value of the waiting current. [0003] However, this adjustment method assumes that the cable is in an ideal operating state, but in fact the ampacity of t...
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Application Information
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