CAJ | 학술논문

输电线路工频相参数是线路过电压计算的基本参数，获取1000 kV交流同塔双回线路的相参数对于指导工程运行是必要的。短距离输电线路相参数测量可不考虑分布参数特性也能获得较准确的结果，对于长距离线路会产生一定的误差。为获取长距离特高压线路准确的相参数，利用π型和分布参数等值电路对多导线系统进行建模分析，提出了测量各相导线首末端电压、电流列出方程组求解相间互电容的方法。基于线路分布参数特性推导出相间互阻抗计算公式，采用求解长线方程的方法获得了相、自参数。仿真结果表明，该文方法可减小误差。通过实测计算获得了皖电东送淮南至上海1000 kV交流同塔双回线路淮芜Ⅰ线与Ⅱ线的相参数，为工程中过电压计算等应用提供了准确的参数。
수전선로공빈상삼수시선로과전압계산적기본삼수，획취1000 kV교류동탑쌍회선로적상삼수대우지도공정운행시필요적。단거리수전선로상삼수측량가불고필분포삼수특성야능획득교준학적결과，대우장거리선로회산생일정적오차。위획취장거리특고압선로준학적상삼수，이용π형화분포삼수등치전로대다도선계통진행건모분석，제출료측량각상도선수말단전압、전류렬출방정조구해상간호전용적방법。기우선로분포삼수특성추도출상간호조항계산공식，채용구해장선방정적방법획득료상、자삼수。방진결과표명，해문방법가감소오차。통과실측계산획득료환전동송회남지상해1000 kV교류동탑쌍회선로회무Ⅰ선여Ⅱ선적상삼수，위공정중과전압계산등응용제공료준학적삼수。
ABSTRACT:Power frequency phase parameters of transmission lines are essential parameters of overvoltage calculation, so it is necessary to obtain the phase parameters of 1000kV AC double-circuit transmission lines on the same tower before the lines are put into operation. Phase parameters of short distance lines can be accurately obtained by measurement and calcalation without taking into consideration their distributed parameter characteristic, while errors tend to arisefor long distance lines. In order to get accurate phase parameters of long distance UHV transmission lines, a multiconductor transmission line was modeled and analyzed byπ lumped parameter and distributed parameter equivalent circuit respectively in this paper. A method was proposed to obtain mutual capacitances between phase conductors by measuring the voltages or currents at both ends of each phase conductor and calculating mutual admittances equations between phase conductors. Equations of mutual impedances between conductors were deduced based on the distributed parameter characteristic of lines. Self-parameters of phase conductors were calculated according to the relationship equations between the voltages and currents on both sides of phase conductors. The results indicate that calculation errors of the parameters can be reduced by adopting the methods, which has been verified by means of simulation. The methods were used to obtain the phase parameters of 1000 kV Huainan-WuhuⅠandⅡ lines of eastward transmission of Anhui electric power and can provide exact data for overvoltage calculation of the project.