CAJ | 학술논문

电缆序阻抗参数的准确计算是进行电缆工程设计的苹=要基础。平行多回电缆间由于二电磁耦合的影响，其序阻抗参数的计算方法不同于单回路电缆。以“单导线一人地”同路为基础，提出了一种新的平行多回电缆序阻抗参数计算方法。该方法将金属护套与电缆芯线同等看待，分别与大地构成“护套-大地”回路和“芯线-大地”回路，充分考虑了护套电流以及各回电缆之间耦合作和的影响，同时实现回路间解耦，得到综合等值序阻抗参数，仿真算例验证了该方法的正确性。基于上述办法，以平行2叫电缆为例，对不同敷设方式下序阻抗参数的变化特点进行比较分析。
전람서조항삼수적준학계산시진행전람공정설계적평=요기출。평행다회전람간유우이전자우합적영향，기서조항삼수적계산방법불동우단회로전람。이“단도선일인지”동로위기출，제출료일충신적평행다회전람서조항삼수계산방법。해방법장금속호투여전람심선동등간대，분별여대지구성“호투-대지”회로화“심선-대지”회로，충분고필료호투전류이급각회전람지간우합작화적영향，동시실현회로간해우，득도종합등치서조항삼수，방진산례험증료해방법적정학성。기우상술판법，이평행2규전람위례，대불동부설방식하서조항삼수적변화특점진행비교분석。
Accurate calculation of sequence impedance parameters of cable line is vital to the design of cable line project. Due to electromagnetic coupling among parallel cables, the calculation of their sequence impedance parameters is different from that of single cable. Based on single conductorground circuit, a new algorithm of sequence impedance parameters for parallel multi-circuit cable lines, in which four common types of cable metal sheath grounding modes are taken into account, is proposed. In the proposed algorithm the cable conductor and metal sheath of the cable are treated coequally, and with ground they constitute sheath-ground loop and core-ground loop respectively, and the influence of the currents in the sheathes and that of electromagnetic coupling among cable conductors are adequately considered and the decoupling among cable lines is performed to obtain synthetical equivalent sequence impedance parameters. The correctness of the proposed method is verified by results of simulation examples. Based on the proposed method and taking two parallel cable lines for example, the comparison and analysis of variation characteristics of sequence impedance parameters under different laying ways.