CAJ | 학술논문

在电力系统中，输电线路参数对系统潮流计算、短路计算、以及继电保护的正确动作等具有重要的意义。而原有工程计算方法往往都存在一定的误差，导致计算的不准确。在此基础上，考虑金属护套对正序阻抗的影响，以及短路电流回流方式对零序阻抗的影响，结合比率法详细推导了单、双回电缆线路序阻抗参数的精确计算公式。最后通过与某电业局所提供的46条电缆线路的实测值及厂家提供的参考值作比较，验证了精确计算公式的准确性。
재전력계통중，수전선로삼수대계통조류계산、단로계산、이급계전보호적정학동작등구유중요적의의。이원유공정계산방법왕왕도존재일정적오차，도치계산적불준학。재차기출상，고필금속호투대정서조항적영향，이급단로전류회류방식대령서조항적영향，결합비솔법상세추도료단、쌍회전람선로서조항삼수적정학계산공식。최후통과여모전업국소제공적46조전람선로적실측치급엄가제공적삼고치작비교，험증료정학계산공식적준학성。
In the power system,the parameters of transmission line is very important to the flow calculation,fault calculation and the correct action of relays. But the original calculation methods often have some errors that leading to the inaccurately calculations. Based on this,this paper takes the impacts of metal sheath on the positive se-quence impedance and the impacts of different fault current's return path on the zero sequence impedance into con-sideration,combines with the ratio method,derivates the accurately formulation of sequence impedance parameters both of single and double cable loop lines. Lastly by comparing with the measured values and reference values of 46 cable lines to verify the accuracy.