CN109799439A - A kind of insulation multi-angle oblique scratches cable dampness experimental evaluation method and device - Google Patents
A kind of insulation multi-angle oblique scratches cable dampness experimental evaluation method and device Download PDFInfo
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Abstract
Description
技术领域technical field
本申请涉及电缆本体绝缘状态检测技术领域，特别涉及一种绝缘多角度倾斜划伤电缆受潮实验评估方法及装置。The present application relates to the technical field of the detection of the insulation state of the cable body, and in particular, to a method and device for evaluating the dampness of an insulated multi-angle inclined and scratched cable.
背景技术Background technique
电缆承担着输送电能的重要作用，电缆使用状态直接影响着电力系统的安全、稳定与经济运行。电缆绝缘是电缆的重要组成部分，同时也是电缆运行过程中容易受损伤的部分。实际运行中，电缆不仅面对着高湿度、强射线等环境的威胁，而且大多数电缆制作过程的不规范，导致电缆绝缘表面存在多角度划伤的情况，电缆绝缘有极大的概率被破环，导致电缆绝缘性能下降。电缆绝缘性能下降不但会造成大量的电能损耗，而且还存在严重的安全风险，轻则线路中工作电流增大，电气设备寿命缩短，重则会酿成火灾和触电事故等，造成难以估量的损失。因此对绝缘多角度倾斜划伤电缆进行受潮状况评估尤为重要。Cables play an important role in transmitting electrical energy, and the use status of cables directly affects the safe, stable and economical operation of the power system. Cable insulation is an important part of the cable, and it is also the part that is easily damaged during the operation of the cable. In actual operation, cables are not only faced with environmental threats such as high humidity and strong rays, but also the non-standard production process of most cables leads to multi-angle scratches on the cable insulation surface, and the cable insulation has a great probability of being broken. ring, resulting in a decrease in the insulation performance of the cable. The decline of the cable insulation performance will not only cause a large amount of power loss, but also have serious safety risks, ranging from increased operating current in the line, shortened life of electrical equipment, and severe fire and electric shock accidents, resulting in incalculable losses. . Therefore, it is particularly important to evaluate the moisture condition of the insulated multi-angle inclined and scratched cables.
目前针对电缆受潮状况的评估，一般使用绝缘状态良好的电缆，很少考虑电缆绝缘状态下降，特别是存在绝缘多角度划伤的情况，没有可靠、安全的方法对绝缘多角度倾斜划伤电缆进行整体受潮情况评估。At present, for the evaluation of the moisture condition of the cable, the cable with good insulation state is generally used, and the deterioration of the insulation state of the cable is rarely considered, especially when the insulation is scratched at multiple angles. Overall dampness assessment.
发明内容SUMMARY OF THE INVENTION
本申请的目的在于提供一种绝缘多角度倾斜划伤电缆受潮实验评估方法及装置，以解决无法对绝缘多角度倾斜划伤电缆进行整体受潮情况评估的问题。The purpose of the present application is to provide a method and device for evaluating the dampness of an insulated multi-angle slanted and scratched cable, so as to solve the problem that the overall damp condition of the insulated multi-angle slanted and scratched cable cannot be evaluated.
一方面，根据本申请的实施例，提供了一种多角度倾斜划伤电缆绝缘受潮实验评估方法，包括：On the one hand, according to the embodiments of the present application, there is provided a method for evaluating the insulation dampness of a multi-angle inclined scratched cable, including:
获取预设时间内预设次数多角度倾斜划伤电缆绝缘表面温度，所述多角度倾斜划伤电缆绝缘表面温度由分布在所述多角度倾斜划伤电缆绝缘表面的数个温度传感器测得，每四个相邻所述温度传感器组成一个矩形区域；Obtaining the temperature of the insulation surface of the multi-angle inclined and scratched cable for a preset number of times within a preset time, and the multi-angle inclined and scratched cable insulation surface temperature is measured by several temperature sensors distributed on the multi-angle inclined and scratched cable insulation surface, Every four adjacent temperature sensors form a rectangular area;
根据所述多角度倾斜划伤电缆绝缘表面温度计算预设时间内每个所述矩形区域的标准权重矩阵和标准偏差矩阵；Calculate the standard weight matrix and the standard deviation matrix of each rectangular area within a preset time according to the multi-angle inclined scratched cable insulation surface temperature;
根据所述标准权重矩阵和所述标准偏差矩阵计算预设时间内每个所述矩形区域的多角度倾斜划伤受潮因子；Calculate, according to the standard weight matrix and the standard deviation matrix, the multi-angle oblique scratch moisture factor of each rectangular area within a preset time;
根据所述多角度倾斜划伤受潮因子评估所述多角度倾斜划伤电缆绝缘受潮状态。The insulation moisture state of the multi-angle inclined scratch cable is evaluated according to the multi-angle inclined scratch moisture factor.
进一步地，所述温度传感器的数量为16个，16个所述温度传感器以4×4结构均匀分布在所述多角度倾斜划伤电缆绝缘的表面。Further, the number of the temperature sensors is 16, and the 16 temperature sensors are evenly distributed on the surface of the multi-angle slanted and scratched cable insulation in a 4×4 structure.
进一步地，所述方法还包括根据所述多角度倾斜划伤电缆绝缘表面温度计算预设时间内每个所述矩形区域的标准权重矩阵的公式为：Further, the method further includes calculating the standard weight matrix of each of the rectangular areas within a preset time according to the multi-angle inclined scratched cable insulation surface temperature. The formula is:
其中，Dj为预设时间内区域Sj的权重矩阵，Dj T为预设时间内区域Sj的权重矩阵Dj的转置矩阵，为矩阵2-范数平方，为预设时间内区域Sj的标准权重矩阵，I为4×4单位矩阵。Among them, D j is the weight matrix of the region S j within the preset time, D j T is the transposed matrix of the weight matrix D j of the region S j within the preset time, is the square of the 2-norm of the matrix, is the standard weight matrix of the region S j within the preset time, and I is a 4×4 unit matrix.
进一步地，所述方法还包括根据所述多角度倾斜划伤电缆绝缘表面温度计算预设时间内每个所述矩形区域的标准偏差矩阵公式为：Further, the method further includes calculating the standard deviation matrix formula of each of the rectangular regions within a preset time according to the multi-angle inclined scratched cable insulation surface temperature as follows:
其中，Qj为预设时间内区域Sj的偏差矩阵，为预设时间内区域Sj的标准偏差矩阵，Qj T为预设时间内区域Sj的偏差矩阵Qj的转置矩阵，为矩阵2-范数平方，I为4×4单位矩阵。Among them, Q j is the deviation matrix of the region S j within the preset time, is the standard deviation matrix of the region S j within the preset time, Q j T is the transpose matrix of the deviation matrix Q j of the region S j within the preset time, is the matrix 2-norm squared, and I is a 4×4 identity matrix.
进一步地，所述根据标准权重矩阵和标准偏差矩阵计算预设时间内每个所述矩形区域的多角度倾斜划伤受潮因子公式为：Further, the formula for calculating the multi-angle oblique scratching moisture factor of each of the rectangular regions within the preset time according to the standard weight matrix and the standard deviation matrix is:
其中，为预设时间内区域Sj的标准权重矩阵，为预设时间内区域Sj的标准偏差矩阵，||·||2为矩阵2-范数，||·||F为矩阵F-范数。in, is the standard weight matrix of the region S j within the preset time, is the standard deviation matrix of the region S j within the preset time, ||·|| 2 is the matrix 2-norm, and ||·|| F is the matrix F-norm.
进一步地，所述根据多角度倾斜划伤受潮因子评估多角度倾斜划伤电缆绝缘受潮状态的步骤，包括：Further, the described step of evaluating the damp state of the insulation of the multi-angle inclined scratched cable according to the multi-angle inclined scratch damp factor includes:
如果所述多角度倾斜划伤受潮因子均不大于第一潮湿阈值，或者，所述多角度倾斜划伤受潮因子中有至少1个且不超过8个多角度倾斜划伤受潮因子大于第一潮湿阈值且不大于第二潮湿阈值，则多角度倾斜划伤电缆绝缘处于轻度不均匀受潮状态；If none of the multi-angle inclined scratch dampness factors is greater than the first wetness threshold, or, at least one and no more than 8 of the multi-angle tilted scratch dampness factors are greater than the first dampness If the threshold value is not greater than the second moisture threshold value, the cable insulation is slightly unevenly damped with multi-angle slanted scratches;
如果所述多角度倾斜划伤受潮因子中有至少1个且不超过3个多角度倾斜划伤受潮因子不小于第二潮湿阈值，或所述多角度倾斜划伤受潮因子中有至少9个且不超过12个多角度倾斜划伤受潮因子大于第一潮湿阈值且不大于第二潮湿阈值，则多角度倾斜划伤电缆绝缘处于中度不均匀受潮状态；If at least 1 and no more than 3 of the multi-angle oblique scratch dampness factors are not less than the second humidity threshold, or at least 9 of the multi-angle oblique scratch dampness factors and If the damp factor of no more than 12 multi-angle inclined scratches is greater than the first wet threshold and not greater than the second wet threshold, the insulation of the multi-angle inclined and scratched cable is in a state of moderately uneven moisture;
如果所述多角度倾斜划伤受潮因子中有至少4个且不超过12个多角度倾斜划伤受潮因子不小于第二潮湿阈值，则多角度倾斜划伤电缆绝缘处于重度不均匀受潮状态；If there are at least 4 and no more than 12 multi-angle inclined scratch moisture factors in the multi-angle inclined scratch moisture factor and not less than the second moisture threshold, then the multi-angle inclined scratch cable insulation is in a state of severe uneven moisture;
其中，所述第一潮湿阈值为36，所述第二潮湿阈值为156。Wherein, the first wetness threshold is 36, and the second wetness threshold is 156.
另一方面，根据本申请的实施例，提供了一种多角度倾斜划伤电缆绝缘受潮实验评估装置，所述多角度倾斜划伤电缆绝缘包括缆芯和设于所述缆芯外侧的电缆绝缘，包括电流发生器，第一高压电缆线，第二高压电缆线，第一高压接触极，第二高压接触极，左固定环，右固定环，温度传感器组件和上位机处理器；On the other hand, according to an embodiment of the present application, there is provided a multi-angle oblique scratched cable insulation damp test evaluation device, the multi-angle oblique scratched cable insulation includes a cable core and a cable insulation provided outside the cable core , including a current generator, a first high-voltage cable, a second high-voltage cable, a first high-voltage contact pole, a second high-voltage contact pole, a left fixing ring, a right fixing ring, a temperature sensor assembly and a host computer processor;
所述电流发生器通过所述第一高压电缆线与所述第一高压接触极连接，所述第一高压接触极通过所述左固定环与所述缆芯连接，所述电流发生器通过所述第二高压电缆线与所述第二高压接触极连接，所述第二高压接触极通过所述右固定环与所述缆芯连接；The current generator is connected to the first high-voltage contact pole through the first high-voltage cable, the first high-voltage contact pole is connected to the cable core through the left fixing ring, and the current generator is connected to the cable core through the the second high-voltage cable is connected to the second high-voltage contact pole, and the second high-voltage contact pole is connected to the cable core through the right fixing ring;
所述温度传感器组件贴设于所述电缆绝缘的表面，所述温度传感器组件与所述上位机处理器连接。The temperature sensor assembly is attached to the insulating surface of the cable, and the temperature sensor assembly is connected to the upper computer processor.
进一步地，所述温度传感器组件包括16个温度传感器，16个所述温度传感器以4×4结构均匀分布在所述电缆绝缘的表面。Further, the temperature sensor assembly includes 16 temperature sensors, and the 16 temperature sensors are uniformly distributed on the surface of the cable insulation in a 4×4 structure.
由以上技术方案可知，本申请实施例提供一种多角度倾斜划伤电缆绝缘受潮实验评估方法及装置，所述方法包括：获取预设时间内预设次数多角度倾斜划伤电缆绝缘表面温度，所述多角度倾斜划伤电缆绝缘表面温度由分布在所述多角度倾斜划伤电缆绝缘表面的数个温度传感器测得，每四个相邻所述温度传感器组成一个矩形区域；根据所述多角度倾斜划伤电缆绝缘表面温度计算预设时间内每个所述矩形区域的标准权重矩阵和标准偏差矩阵；根据所述标准权重矩阵和所述标准偏差矩阵计算预设时间内每个所述矩形区域的多角度倾斜划伤受潮因子；根据所述多角度倾斜划伤受潮因子评估所述多角度倾斜划伤电缆绝缘受潮状态。本申请能够对绝缘多角度倾斜划伤的电缆进行受潮状况的评估。It can be seen from the above technical solutions that the embodiment of the present application provides a method and device for evaluating the moisture exposure of the insulation of the multi-angle inclined scratched cable. The temperature of the insulation surface of the multi-angle inclined scratched cable is measured by several temperature sensors distributed on the insulation surface of the multi-angle inclined and scratched cable, and every four adjacent temperature sensors form a rectangular area; Calculate the standard weight matrix and standard deviation matrix of each rectangular area within a preset time; calculate each rectangle within a preset time according to the standard weight matrix and the standard deviation matrix Moisture factor of multi-angle inclined scratches in the area; the insulation moisture state of the multi-angle inclined scratches is evaluated according to the multi-angle inclined and scratched moisture factors. The present application can evaluate the moisture condition of the cable whose insulation is inclined and scratched at multiple angles.
附图说明Description of drawings
为了更清楚地说明本申请实施例或现有技术中的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the accompanying drawings required in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some of the present application. In the embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without any creative effort.
图1为根据本申请实施例示出一种多角度倾斜划伤电缆绝缘受潮实验评估方法的流程图；1 is a flow chart illustrating a method for evaluating a multi-angle inclined scratched cable insulation damp test according to an embodiment of the present application;
图2为根据本申请实施例示出电缆绝缘表面温度传感器分布图；FIG. 2 is a diagram showing the distribution of temperature sensors on the surface of cable insulation according to an embodiment of the present application;
图3为根据本申请实施例示出一种多角度倾斜划伤电缆绝缘受潮实验评估装置的结构示意图。FIG. 3 is a schematic structural diagram of a multi-angle obliquely scratched cable insulation damp test evaluation device according to an embodiment of the present application.
图示说明：Illustration description:
其中，1-上位机处理器，2-电流发生器，3-第二高压电缆线，4-第一高压电缆线，5-第一高压接触极，6-第二高压接触极，7-左固定环，8-右固定环，9-缆芯，10-电缆绝缘，温度传感器组件和，11-第一温度传感器，12-第二温度传感器，13-第三温度传感器，14-第四温度传感器，15-第五温度传感器，16-第六温度传感器，17-第七温度传感器，18-第八温度传感器，19-第九温度传感器，20-第十温度传感器，21-第十一温度传感器，22-第十二温度传感器，23-第十三温度传感器，24-第十四温度传感器，25-第十五温度传感器，26-第十六温度传感器。Among them, 1-host computer processor, 2-current generator, 3-second high-voltage cable, 4-first high-voltage cable, 5-first high-voltage contact pole, 6-second high-voltage contact pole, 7-left Fixing ring, 8-right fixing ring, 9-cable core, 10-cable insulation, temperature sensor assembly and, 11-first temperature sensor, 12-second temperature sensor, 13-third temperature sensor, 14-fourth temperature sensor, 15-fifth temperature sensor, 16-sixth temperature sensor, 17-seventh temperature sensor, 18-eighth temperature sensor, 19-ninth temperature sensor, 20-tenth temperature sensor, 21-eleventh temperature Sensor, 22-twelfth temperature sensor, 23-thirteenth temperature sensor, 24-fourteenth temperature sensor, 25-fifteenth temperature sensor, 26-sixteenth temperature sensor.
具体实施方式Detailed ways
参阅图1，本申请实施例提供一种多角度倾斜划伤电缆绝缘受潮实验评估方法，包括：Referring to FIG. 1 , an embodiment of the present application provides a method for evaluating a multi-angle oblique scratched cable insulation damp test, including:
步骤S1、获取预设时间内预设次数多角度倾斜划伤电缆绝缘表面温度，所述多角度倾斜划伤电缆绝缘表面温度由分布在所述多角度倾斜划伤电缆绝缘表面的数个温度传感器测得，每四个相邻所述温度传感器组成一个矩形区域；Step S1: Obtain the insulation surface temperature of the multi-angle inclining and scratching cable for a preset number of times within a preset time, and the multi-angle inclining and scratching cable insulation surface temperature is determined by several temperature sensors distributed on the multi-angle inclining and scratching the cable insulation surface. It is measured that every four adjacent temperature sensors form a rectangular area;
在进行步骤S1之前，需要制作多角度倾斜划伤电缆绝缘。Before proceeding to step S1, it is necessary to make multi-angle slanted scratches on the cable insulation.
步骤S2、根据所述多角度倾斜划伤电缆绝缘表面温度计算预设时间内每个所述矩形区域的标准权重矩阵和标准偏差矩阵；Step S2, calculating the standard weight matrix and the standard deviation matrix of each of the rectangular regions within a preset time according to the multi-angle inclined scratched cable insulation surface temperature;
步骤S3、根据所述标准权重矩阵和所述标准偏差矩阵计算预设时间内每个所述矩形区域的多角度倾斜划伤受潮因子；Step S3, calculating, according to the standard weight matrix and the standard deviation matrix, the multi-angle oblique scratching and damping factor of each of the rectangular regions within a preset time;
步骤S4、根据所述多角度倾斜划伤受潮因子评估所述多角度倾斜划伤电缆绝缘受潮状态。Step S4: Evaluate the damp state of the insulation of the multi-angle inclined scratched cable according to the multi-angle inclined scratched moisture factor.
进一步地，所述温度传感器的数量为16个，16个所述温度传感器以4×4结构均匀分布在所述多角度倾斜划伤电缆绝缘的表面。本申请中，温度传感器的排列方式为图2，每个区域面积相等，其好处在于，四个温度传感器测得的温度数据组成的矩形区域，一定程度上能够反映这个区域的温度情况。同时，按图2排列，既反映了同一电缆轴线的温度，又反映了同一电缆横截面的温度。Further, the number of the temperature sensors is 16, and the 16 temperature sensors are evenly distributed on the surface of the multi-angle slanted and scratched cable insulation in a 4×4 structure. In this application, the arrangement of the temperature sensors is shown in Figure 2, and each area has the same area. The advantage is that the rectangular area formed by the temperature data measured by the four temperature sensors can reflect the temperature of this area to a certain extent. At the same time, according to Figure 2, it reflects the temperature of the same cable axis and the temperature of the same cable cross section.
进一步地，所述方法还包括根据所述多角度倾斜划伤电缆绝缘表面温度计算预设时间内每个所述矩形区域的标准权重矩阵的公式为：Further, the method further includes calculating the standard weight matrix of each of the rectangular areas within a preset time according to the multi-angle inclined scratched cable insulation surface temperature. The formula is:
其中，Dj为预设时间内区域Sj的权重矩阵，Dj T为预设时间内区域Sj的权重矩阵Dj的转置矩阵，为矩阵2-范数平方，为预设时间内区域Sj的标准权重矩阵，I为4×4单位矩阵。Among them, D j is the weight matrix of the region S j within the preset time, D j T is the transposed matrix of the weight matrix D j of the region S j within the preset time, is the square of the 2-norm of the matrix, is the standard weight matrix of the region S j within the preset time, and I is a 4×4 unit matrix.
以16个温度传感器，预设时间为1min，预设次数4次为例。温度传感器每隔15s采集一次多角度划伤电缆绝缘10表面温度，以1min为一个周期，即一个温度传感器在1min内采集四组数据，每隔1min提取一次温度传感器中数据，记为c(i,t)，表示第i温度传感器在1min内采集的第t次数据，i为实数，i∈[1,16]，t为实数，t∈[1,4]。Take 16 temperature sensors, the preset time is 1min, and the preset times are 4 times as an example. The temperature sensor collects the surface temperature of multi-angle scratched cable insulation 10 every 15s, with 1min as a cycle, that is, a temperature sensor collects four sets of data within 1min, and the data in the temperature sensor is extracted every 1min, which is recorded as c (i ,t) , represents the t-th data collected by the i-th temperature sensor within 1min, i is a real number, i∈[1,16], t is a real number, t∈[1,4].
将第一温度传感器11、第二温度传感器12、第三温度传感器15、第四温度传感器16所围的区域记为S1，将第三温度传感器15、第四温度传感器16、第五温度传感器19、第六温度传感器20所围的区域记为S2，将第五温度传感器19、第六温度传感器20、第七温度传感器23、第八温度传感器24所围的区域记为S3，将第二温度传感器12、第四温度传感器16、第九温度传感器13、第十一温度传感器17所围的区域记为S4，将第四温度传感器16、第六温度传感器20、第十一温度传感器17、第十三温度传感器21所围的区域记为S5，将第六温度传感器20、第八温度传感器24、第十三温度传感器21、第十五温度传感器25所围的区域记为S6，将第九温度传感器13、第十温度传感器14、第十一温度传感器17、第十二温度传感器18所围的区域记为S7，将第十一温度传感器17、第十二温度传感器18、第十三温度传感器21、第十四温度传感器22所围的区域记为S8，将第十三温度传感器21、第十四温度传感器22、第十五温度传感器25、第十六温度传感器26所围的区域记为S9，将第十温度传感器14、第十二温度传感器18、第一温度传感器11、第三温度传感器15所围的区域记为S10，将第十二温度传感器18、第十四温度传感器22、第三温度传感器15、第五温度传感器19所围的区域记为S11，将第十四温度传感器22、第十六温度传感器26、第五温度传感器19、第七温度传感器23所围的区域记为S12。The area surrounded by the first temperature sensor 11 , the second temperature sensor 12 , the third temperature sensor 15 , and the fourth temperature sensor 16 is denoted as S 1 , and the third temperature sensor 15 , the fourth temperature sensor 16 , and the fifth temperature sensor are denoted as S 1 . 19. The area surrounded by the sixth temperature sensor 20 is denoted as S 2 , the area surrounded by the fifth temperature sensor 19 , the sixth temperature sensor 20 , the seventh temperature sensor 23 , and the eighth temperature sensor 24 is denoted as S 3 , and the The area surrounded by the second temperature sensor 12 , the fourth temperature sensor 16 , the ninth temperature sensor 13 , and the eleventh temperature sensor 17 is denoted as S 4 , and the fourth temperature sensor 16 , the sixth temperature sensor 20 , and the eleventh temperature The area surrounded by the sensor 17 and the thirteenth temperature sensor 21 is denoted as S 5 , and the area surrounded by the sixth temperature sensor 20 , the eighth temperature sensor 24 , the thirteenth temperature sensor 21 and the fifteenth temperature sensor 25 is denoted as S 5 . S6 , the area surrounded by the ninth temperature sensor 13, the tenth temperature sensor 14 , the eleventh temperature sensor 17, and the twelfth temperature sensor 18 is denoted as S7, and the eleventh temperature sensor 17, the twelfth temperature The area surrounded by the sensor 18 , the thirteenth temperature sensor 21 , and the fourteenth temperature sensor 22 is denoted as S 8 , and the thirteenth temperature sensor 21 , the fourteenth temperature sensor 22 , the fifteenth temperature sensor 25 , and the sixteenth temperature sensor 22 are designated as S 8 . The area surrounded by the temperature sensor 26 is denoted as S 9 , the area surrounded by the tenth temperature sensor 14 , the twelfth temperature sensor 18 , the first temperature sensor 11 , and the third temperature sensor 15 is denoted as S 10 , and the twelfth temperature sensor 15 is denoted as S 10 . The area surrounded by the temperature sensor 18 , the fourteenth temperature sensor 22 , the third temperature sensor 15 , and the fifth temperature sensor 19 is denoted as S 11 , and the fourteenth temperature sensor 22 , the sixteenth temperature sensor 26 , and the fifth temperature sensor are denoted as S 11 . 19. The area surrounded by the seventh temperature sensor 23 is denoted as S 12 .
计算1min内区域Sj的标准权重矩阵 Calculate the standard weight matrix of the area S j within 1min
为1min内区域Sj的权重列向量，其中： is the weight column vector of the area S j within 1min, where:
j＝1时，k1＝1、k2＝2、k3＝3、k4＝4；When j=1, k 1 =1, k 2 =2, k 3 =3, k 4 =4;
j＝2时，k1＝3、k2＝4、k3＝5、k4＝6；When j=2, k 1 =3, k 2 =4, k 3 =5, k 4 =6;
j＝3时，k1＝5、k2＝6、k3＝7、k4＝8；When j=3, k 1 =5, k 2 =6, k 3 =7, k 4 =8;
j＝4时，k1＝2、k2＝9、k3＝4、k4＝11；When j=4, k 1 =2, k 2 =9, k 3 =4, k 4 =11;
j＝5时，k1＝4、k2＝11、k3＝6、k4＝13；When j=5, k 1 =4, k 2 =11, k 3 =6, k 4 =13;
j＝6时，k1＝6、k2＝13、k3＝8、k4＝15；When j=6, k 1 =6, k 2 =13, k 3 =8, k 4 =15;
j＝7时，k1＝9、k2＝10、k3＝11、k4＝12；When j=7, k 1 =9, k 2 =10, k 3 =11, k 4 =12;
j＝8时，k1＝11、k2＝12、k3＝13、k4＝14；When j=8, k 1 =11, k 2 =12, k 3 =13, k 4 =14;
j＝9时，k1＝13、k2＝14、k3＝15、k4＝16；When j=9, k 1 =13, k 2 =14, k 3 =15, k 4 =16;
j＝10时，k1＝10、k2＝1、k3＝12、k4＝3；When j=10, k 1 =10, k 2 =1, k 3 =12, k 4 =3;
j＝11时，k1＝12、k2＝3、k3＝14、k4＝5；When j=11, k 1 =12, k 2 =3, k 3 =14, k 4 =5;
j＝12时，k1＝14、k2＝5、k3＝16、k4＝7；When j=12, k 1 =14, k 2 =5, k 3 =16, k 4 =7;
e为自然常数，取2.7188，Dj为1min内区域Sj的权重矩阵，Dj T为1min内区域Sj的权重矩阵Dj的转置矩阵，为矩阵2-范数平方，为1min内区域Sj的标准权重矩阵，I为4×4单位矩阵；ki为第i温度传感器，i为实数，i∈[1,16]。e is a natural constant, take 2.7188, D j is the weight matrix of the area S j within 1min, D j T is the transpose matrix of the weight matrix D j of the area S j within 1min, is the square of the 2-norm of the matrix, is the standard weight matrix of the area S j within 1min, I is a 4×4 unit matrix; ki is the ith temperature sensor, i is a real number, i∈[1,16].
进一步地，所述方法还包括根据所述多角度倾斜划伤电缆绝缘表面温度计算预设时间内每个所述矩形区域的标准偏差矩阵公式为：Further, the method further includes calculating the standard deviation matrix formula of each of the rectangular regions within a preset time according to the multi-angle inclined scratched cable insulation surface temperature as follows:
其中，Qj为预设时间内区域Sj的偏差矩阵，为预设时间内区域Sj的标准偏差矩阵，Qj T为预设时间内区域Sj的偏差矩阵Qj的转置矩阵，为矩阵2-范数平方，I为4×4单位矩阵。Among them, Q j is the deviation matrix of the region S j within the preset time, is the standard deviation matrix of the region S j within the preset time, Q j T is the transpose matrix of the deviation matrix Q j of the region S j within the preset time, is the matrix 2-norm squared, and I is a 4×4 identity matrix.
以16个温度传感器，预设时间为1min，预设次数4次为例，即温度传感器每隔15s采集一次多角度倾斜划伤电缆绝缘表面温度。Take 16 temperature sensors, the preset time is 1min, and the preset times are 4 times as an example, that is, the temperature sensor collects the temperature of the insulation surface of the multi-angle inclined and scratched cable every 15s.
计算1min内区域Sj的标准偏差矩阵 Calculate the standard deviation matrix of the area S j within 1min
为1min内区域Sj的偏差列向量，其中： is the deviation column vector of the region S j within 1min, where:
j＝1时，k1＝1、k2＝2、k3＝3、k4＝4；When j=1, k 1 =1, k 2 =2, k 3 =3, k 4 =4;
j＝2时，k1＝3、k2＝4、k3＝5、k4＝6；When j=2, k 1 =3, k 2 =4, k 3 =5, k 4 =6;
j＝3时，k1＝5、k2＝6、k3＝7、k4＝8；When j=3, k 1 =5, k 2 =6, k 3 =7, k 4 =8;
j＝4时，k1＝2、k2＝9、k3＝4、k4＝11；When j=4, k 1 =2, k 2 =9, k 3 =4, k 4 =11;
j＝5时，k1＝4、k2＝11、k3＝6、k4＝13；When j=5, k 1 =4, k 2 =11, k 3 =6, k 4 =13;
j＝6时，k1＝6、k2＝13、k3＝8、k4＝15；When j=6, k 1 =6, k 2 =13, k 3 =8, k 4 =15;
j＝7时，k1＝9、k2＝10、k3＝11、k4＝12；When j=7, k 1 =9, k 2 =10, k 3 =11, k 4 =12;
j＝8时，k1＝11、k2＝12、k3＝13、k4＝14；When j=8, k 1 =11, k 2 =12, k 3 =13, k 4 =14;
j＝9时，k1＝13、k2＝14、k3＝15、k4＝16；When j=9, k 1 =13, k 2 =14, k 3 =15, k 4 =16;
j＝10时，k1＝10、k2＝1、k3＝12、k4＝3；When j=10, k 1 =10, k 2 =1, k 3 =12, k 4 =3;
j＝11时，k1＝12、k2＝3、k3＝14、k4＝5；When j=11, k 1 =12, k 2 =3, k 3 =14, k 4 =5;
j＝12时，k1＝14、k2＝5、k3＝16、k4＝7；When j=12, k 1 =14, k 2 =5, k 3 =16, k 4 =7;
e为自然常数，取2.7188，Qj为1min内区域Sj的偏差矩阵，为1min内区域Sj的标准偏差矩阵，Qj T为1min内区域Sj的偏差矩阵Qj的转置矩阵，为矩阵2-范数平方，I为4×4单位矩阵；ki为第i温度传感器，i为实数，i∈[1,16]。e is a natural constant, take 2.7188, Q j is the deviation matrix of area S j within 1min, is the standard deviation matrix of the region S j within 1min, Q j T is the transpose matrix of the deviation matrix Q j of the region S j within 1min, is the matrix 2-norm squared, I is a 4×4 unit matrix; ki is the ith temperature sensor, i is a real number, i∈[1,16].
进一步地，所述根据标准权重矩阵和标准偏差矩阵计算预设时间内每个所述矩形区域的多角度倾斜划伤受潮因子公式为：Further, the formula for calculating the multi-angle oblique scratching moisture factor of each of the rectangular regions within the preset time according to the standard weight matrix and the standard deviation matrix is:
其中，为预设时间内区域Sj的标准权重矩阵，为预设时间内区域Sj的标准偏差矩阵，||·||2为矩阵2-范数，||·||F为矩阵F-范数。in, is the standard weight matrix of the region S j within the preset time, is the standard deviation matrix of the region S j within the preset time, ||·|| 2 is the matrix 2-norm, and ||·|| F is the matrix F-norm.
进一步地，所述根据多角度倾斜划伤受潮因子评估多角度倾斜划伤电缆绝缘受潮状态的步骤，包括：Further, the described step of evaluating the damp state of the insulation of the multi-angle inclined scratched cable according to the multi-angle inclined scratch damp factor includes:
如果所述多角度倾斜划伤受潮因子均不大于第一潮湿阈值，或者，所述多角度倾斜划伤受潮因子中有至少1个且不超过8个多角度倾斜划伤受潮因子大于第一潮湿阈值且不大于第二潮湿阈值，则多角度倾斜划伤电缆绝缘处于轻度不均匀受潮状态；If none of the multi-angle inclined scratch dampness factors are greater than the first wetness threshold, or, at least one and no more than 8 of the multi-angle tilted scratch dampness factors are greater than the first dampness If the threshold value is not greater than the second moisture threshold value, the cable insulation is slightly unevenly damped with multi-angle slanted scratches;
如果所述多角度倾斜划伤受潮因子中有至少1个且不超过3个多角度倾斜划伤受潮因子不小于第二潮湿阈值，或所述多角度倾斜划伤受潮因子中有至少9个且不超过12个多角度倾斜划伤受潮因子大于第一潮湿阈值且不大于第二潮湿阈值，则多角度倾斜划伤电缆绝缘处于中度不均匀受潮状态；If at least 1 and no more than 3 of the multi-angle oblique scratch dampness factors are not less than the second humidity threshold, or at least 9 of the multi-angle oblique scratch dampness factors and If the damp factor of no more than 12 multi-angle inclined scratches is greater than the first wet threshold and not greater than the second wet threshold, the insulation of the multi-angle inclined and scratched cable is in a state of moderately uneven moisture;
如果所述多角度倾斜划伤受潮因子中有至少4个且不超过12个多角度倾斜划伤受潮因子不小于第二潮湿阈值，则多角度倾斜划伤电缆绝缘处于重度不均匀受潮状态；If there are at least 4 and no more than 12 multi-angle inclined scratch moisture factors in the multi-angle inclined scratch moisture factor and not less than the second moisture threshold, then the multi-angle inclined scratch cable insulation is in a state of severe uneven moisture;
其中，所述第一潮湿阈值为36，所述第二潮湿阈值为156。Wherein, the first wetness threshold is 36, and the second wetness threshold is 156.
参阅图3，本申请实施例提供一种多角度倾斜划伤电缆绝缘受潮实验评估装置，所述多角度倾斜划伤电缆绝缘包括缆芯9和设于所述缆芯9外侧的电缆绝缘10，包括电流发生器2，第一高压电缆线4，第二高压电缆线3，第一高压接触极5，第二高压接触极6，左固定环7，右固定环8，温度传感器组件和上位机处理器1；Referring to FIG. 3 , an embodiment of the present application provides a multi-angle oblique scratched cable insulation damp test evaluation device, the multi-angle oblique scratched cable insulation includes a cable core 9 and a cable insulation 10 disposed outside the cable core 9, Including current generator 2, first high-voltage cable 4, second high-voltage cable 3, first high-voltage contact pole 5, second high-voltage contact pole 6, left fixing ring 7, right fixing ring 8, temperature sensor assembly and host computer processor 1;
所述电流发生器2通过所述第一高压电缆线4与所述第一高压接触极5连接，所述第一高压接触极5通过所述左固定环7与所述缆芯9连接，所述电流发生器2通过所述第二高压电缆线3与所述第二高压接触极6连接，所述第二高压接触极6通过所述右固定环8与所述缆芯9连接；The current generator 2 is connected to the first high-voltage contact pole 5 through the first high-voltage cable 4, and the first high-voltage contact pole 5 is connected to the cable core 9 through the left fixing ring 7, so The current generator 2 is connected to the second high-voltage contact pole 6 through the second high-voltage cable 3, and the second high-voltage contact pole 6 is connected to the cable core 9 through the right fixing ring 8;
所述温度传感器组件贴设于所述电缆绝缘10的表面，所述温度传感器组件与所述上位机处理器1连接。The temperature sensor assembly is attached to the surface of the cable insulation 10 , and the temperature sensor assembly is connected to the upper computer processor 1 .
电流发生器2产生的电流通过第一高压电缆线4流出，第一高压电缆线4尾端的第一高压接触极5通过左固定环7与缆芯9连接，电流通过第二高压电缆线3流入，第二高压电缆线3尾端的第二高压接触极6通过右固定环8与缆芯9连接。The current generated by the current generator 2 flows out through the first high-voltage cable 4, the first high-voltage contact pole 5 at the tail end of the first high-voltage cable 4 is connected to the cable core 9 through the left fixing ring 7, and the current flows in through the second high-voltage cable 3. , the second high-voltage contact pole 6 at the tail end of the second high-voltage cable 3 is connected to the cable core 9 through the right fixing ring 8 .
进一步地，所述温度传感器组件包括16个温度传感器，16个所述温度传感器以4×4结构均匀分布在所述电缆绝缘的表面。将16个温度传感器均匀布置在电缆绝缘10表面四周。其中，第一温度传感器11、第三温度传感器15、第五温度传感器19、第七温度传感器23沿电缆轴线均匀放置在前表面中线上，第二温度传感器12、第四温度传感器16、第六温度传感器20、第八温度传感器24沿电缆轴线均匀放置在下表面中线上，第九温度传感器13、第十一温度传感器17、第十三温度传感器21、第十五温度传感器25沿电缆轴线均匀放置在后表面中线上，第十温度传感器14、第十二温度传感器18、第十四温度传感器22、第十六温度传感器26沿电缆轴线均匀放置在上表面中线上。Further, the temperature sensor assembly includes 16 temperature sensors, and the 16 temperature sensors are evenly distributed on the surface of the cable insulation in a 4×4 structure. The 16 temperature sensors are evenly arranged around the surface of the cable insulation 10. Among them, the first temperature sensor 11, the third temperature sensor 15, the fifth temperature sensor 19, the seventh temperature sensor 23 are evenly placed on the centerline of the front surface along the cable axis, the second temperature sensor 12, the fourth temperature sensor 16, the sixth temperature sensor The temperature sensor 20, the eighth temperature sensor 24 are evenly placed on the centerline of the lower surface along the cable axis, the ninth temperature sensor 13, the eleventh temperature sensor 17, the thirteenth temperature sensor 21, and the fifteenth temperature sensor 25 are evenly placed along the cable axis On the rear surface centerline, the tenth temperature sensor 14, the twelfth temperature sensor 18, the fourteenth temperature sensor 22, and the sixteenth temperature sensor 26 are evenly placed on the upper surface centerline along the cable axis.
由以上技术方案可知，本申请实施例提供一种多角度倾斜划伤电缆绝缘受潮实验评估方法及装置，所述方法包括：获取预设时间内预设次数多角度倾斜划伤电缆绝缘表面温度，所述多角度倾斜划伤电缆绝缘表面温度由分布在所述多角度倾斜划伤电缆绝缘表面的数个温度传感器测得，每四个相邻所述温度传感器组成一个矩形区域；根据所述多角度倾斜划伤电缆绝缘表面温度计算预设时间内每个所述矩形区域的标准权重矩阵和标准偏差矩阵；根据所述标准权重矩阵和所述标准偏差矩阵计算预设时间内每个所述矩形区域的多角度倾斜划伤受潮因子；根据所述多角度倾斜划伤受潮因子评估所述多角度倾斜划伤电缆绝缘受潮状态。本申请能够对绝缘多角度倾斜划伤的电缆进行受潮状况的评估。It can be seen from the above technical solutions that the embodiment of the present application provides a method and device for evaluating the moisture exposure of the insulation of the multi-angle inclined scratched cable. The temperature of the insulation surface of the multi-angle inclined scratched cable is measured by several temperature sensors distributed on the insulation surface of the multi-angle inclined and scratched cable, and every four adjacent temperature sensors form a rectangular area; Calculate the standard weight matrix and standard deviation matrix of each rectangular area within a preset time; calculate each rectangle within a preset time according to the standard weight matrix and the standard deviation matrix Moisture factor of multi-angle inclined scratches in the area; the insulation moisture state of the multi-angle inclined scratches is evaluated according to the multi-angle inclined and scratched moisture factors. The present application can evaluate the moisture condition of the cable whose insulation is inclined and scratched at multiple angles.
本领域技术人员在考虑说明书及实践这里公开的申请后，将容易想到本申请的其它实施方案。本申请旨在涵盖本申请的任何变型、用途或者适应性变化，这些变型、用途或者适应性变化遵循本申请的一般性原理并包括本申请未公开的本技术领域中的公知常识或惯用技术手段。说明书和实施例仅被视为示例性的，本申请的真正范围和精神由下面的权利要求指出。Other embodiments of the present application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses or adaptations of this application that follow the general principles of this application and include common knowledge or conventional techniques in the technical field not disclosed in this application . The specification and examples are to be regarded as exemplary only, with the true scope and spirit of the application being indicated by the following claims.
应当理解的是，本申请并不局限于上面已经描述并在附图中示出的精确结构，并且可以在不脱离其范围进行各种修改和改变。本申请的范围仅由所附的权利要求来限制。It is to be understood that the present application is not limited to the precise structures described above and illustrated in the accompanying drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.
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