【摘要】：電容電流過大是電力電纜線路最重要的問題之一。為減小電力電纜線路的對(duì)地電容電流,對(duì)傳統(tǒng)電力電纜進(jìn)行了創(chuàng)新設(shè)計(jì),在電力電纜線芯外添加了磁粉層而成為大電感電力電纜。介紹了大電感電力電纜電感和電容的計(jì)算方法。建立了大電感電力電纜和傳統(tǒng)電力電纜的ANSYS有限元仿真模型,對(duì)它們的導(dǎo)體電阻、絕緣電阻、電感、電容、集膚效應(yīng)和渦流損耗進(jìn)行了對(duì)比分析;建立了2種電力電纜的基于MATLAB的對(duì)地電容電流仿真模型,并對(duì)它們的對(duì)地電容電流和接地故障時(shí)的暫態(tài)電容電流進(jìn)行了對(duì)比分析。結(jié)果表明:大電感電力電纜能夠滿足傳統(tǒng)電力電纜的基本技術(shù)要求;根據(jù)磁粉量的大小不同,大電感電力電纜的單位長(zhǎng)度電感值可達(dá)傳統(tǒng)電力電纜的2~10倍,電容電流比傳統(tǒng)電力電纜減小10%~20%,渦流損耗比傳統(tǒng)電力電纜減小1%;并且磁粉層越厚,電容值就越小。因此,增加磁粉層,不僅能減少電容,從源頭上減少電力電纜的電容電流,而且能降低電力電纜的集膚效應(yīng)和渦流損耗。
[Abstract]:Excessive capacitive current is one of the most important problems in power cable lines. In order to reduce the earth capacitive current of power cable line, the traditional power cable is designed innovatively. A magnetic powder layer is added to the core of power cable to become a large inductance power cable. The calculation method of inductance and capacitance of power cable with large inductance is introduced. The ANSYS finite element simulation model of large inductance power cable and traditional power cable is established, and their conductor resistance, insulation resistance, inductance, capacitance, skin effect and eddy current loss are compared and analyzed. The ground capacitance current simulation model based on MATLAB for two kinds of power cables is established, and their earth capacitance current and transient capacitive current in grounding fault are compared and analyzed. The results show that the large inductance power cable can meet the basic technical requirements of the traditional power cable, and the inductance per unit length of the large inductance power cable can be 2 ~ 10 times that of the traditional power cable according to the size of magnetic particle. The capacitance current is 10 / 20 less than that of the traditional power cable, the eddy current loss is 1 / 10 less than that of the traditional power cable, and the thicker the magnetic powder layer, the smaller the capacitance. Therefore, the increase of magnetic powder layer can not only reduce the capacitance, the capacitance current of power cable from the source, but also reduce the skin effect and eddy current loss of power cable.
【作者單位】： 湖南大學(xué)電氣與信息工程學(xué)院;中南大學(xué);金杯電工股份有限公司;
【基金】：湖南省重大科技專項(xiàng)基金(06GK1003-1)~~
【分類號(hào)】：TM75
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本文編號(hào)：2225780