本文關(guān)鍵詞：電纜電氣參數(shù)不同計(jì)算方法及其比較，，由筆耕文化傳播整理發(fā)布。

電纜電氣參數(shù)不同計(jì)算方法及其比較

Comparison of Different Methods for Calculating Electrical Parameters of Power Cables

[1] [2]

XU Zheng,QIAN Jie（School of Electrical Engineering,Zhejiang University,Hangzhou 310027,China）

浙江大學(xué)電氣工程學(xué)院,杭州310027

文章摘要：為了能夠準(zhǔn)確、方便地計(jì)算出電力電纜的電氣參數(shù),包括電纜的電阻矩陣、電感矩陣、電容矩陣、電導(dǎo)矩陣以及序阻抗等,分別采用Carson-Clem公式、《電力系統(tǒng)建模及故障分析》中的方法以及Matlab中power_cableparam功能所用的方法進(jìn)行比較,研究它們針對(duì)不同結(jié)構(gòu)和不同排列方式的電纜的計(jì)算原理,并給出正序模型和零序模型中相關(guān)參數(shù)的計(jì)算方法,再以不同結(jié)構(gòu)的電纜為算例驗(yàn)證其準(zhǔn)確性。比較結(jié)果顯示,《電力系統(tǒng)建模及故障分析》中的方法在計(jì)算線芯和護(hù)套間電容時(shí)存在缺陷;power_cableparam功能所用的方法計(jì)算導(dǎo)體自身電阻時(shí)所用的是直流電阻,未考慮集膚效應(yīng)和鄰近效應(yīng),且只可用于計(jì)算相互等間距的電纜,對(duì)于非等間距排列電纜和帶鎧裝電纜不適用。結(jié)果說明Carson-Clem公式在準(zhǔn)確性和通用性方面是最優(yōu)的,采用此方法可以為電纜的后續(xù)研究提供準(zhǔn)確、可靠的電纜參數(shù)。

Abstr：To calculate the electrical parameters of power cables accurately and easily,including the resistance matrix,the inductance matrix,the capacitance matrix,the conductance matrix,and the sequence impedance,we studied and compared three methods,namely,Carson-Clem formula,the method in ＂Power Systems Modeling and Fault Analysis＂,and the ’power_cableparam’ function in Matlab.Focussing on their calculation principles,we proposed a calculating method of parameters in the positive sequence model and zero sequence model.Furthermore,the accuracy of the proposed method was verified based on calculations with different structures of the cables.Comparison results show that the method in ＂Power Systems Modeling and Fault Analysis＂ has defects on calculating the capacitance between the core and sheath of a cable,and that the ’power_cableparam’ function calculates cable resistance as DC resistance,ignoring the skin effect and proximity effect.In addition,the ’power_cableparam’ function becomes invalid when it is applied to calculate armored cables or cables in unequal spacing arrangement.Therefore,it is concluded that the Carson-Clem formula has certain advantages in accuracy and generality to calculate the electrical parameters of cables,and it can provide reliable data for further studying cable.

文章關(guān)鍵詞：

Keyword：:power cable electrical parameters resistance matrix inductance matrix capacitance matrix sequence impedance

課題項(xiàng)目：國家高技術(shù)研究發(fā)展計(jì)劃（863計(jì)劃）（2012AA051704）

  本文關(guān)鍵詞：電纜電氣參數(shù)不同計(jì)算方法及其比較，由筆耕文化傳播整理發(fā)布。