6072i = Zk15 + Zk16 + (Zk15 * Zk16/(3.5 * ZL4)) = 0.1659 +10.4276 i = 3.5 * ZL4 + Zk16 + (3.5 * ZL4 * Zk16/Zk15) = 0.1622 + 1.2882i = 3.5 * ZL4 + Zk15 + (3.5 * ZL4 * Zk15/Zk16) = 3.5983 +10.2198 i = Zk13 * Zk17/ (Zk13 + Zk17) = 0.1584 + 2.5980i = Zt3 * Zk18/(Zt3 + Zk18) = 0.0251 + 0.5104i = Zt4 * Zk18/(Zt4 + Zk18) = 0.0431 + 0.6677i = 3.5 * Zl1 + Zk21 + (3.5 * Zl1 * Zk21/Zk19) = 0.1708 + 1.1342i = Zk19 + Zk21 + (Zk19 * Zk21/(3.5 * Zl1)) = 4.9332 +19.6679 i = 3.5 * Zl1 + Zk19 + (3.5 * Zl1 * Zk19/Zk21) = 10.3324 +22.0173 i = Zz22 * Zk24/(Zz22 + Zk24) = 0.0676 + 0.9312i = Zk25 * 3.5 * ZL2/(Zk25 +3.5 * ZL2) = 0.2088 + 0.8462iekv1 = Zt1 * Zt2/(Zt1 + Zt2) = 0 + 0.1692iekv2 = (Zk23 * (Zk26 + Zk27))/(Zk23 + Zk26 + Zk27) = 0.1056 + 0.6924iekv = Z0ekv1 * Z02ekv/(Z0ekv1 + Z02ekv) = 0.0040 + 0.1365i
Схема матиме остаточний вигляд:
В
Струм однофазного КЗ:
Ikz1 = (3 * Eekv/(2 * Zekv + Z0ekv)) * Ib = 2.7616 - 8.5298i = 8,9 кА
Ток двофазного КЗ:
Ikz2 = (1.73205 * Eekv/(2 * Zekv)) * Ib = 1.8946 - 5.9320i = 6,22 кА
Ток двофазного КЗ на землю:
Ikz21 = ((1.73205 * Eekv * (1Zekv * Z0ekv/(Zekv + Z0ekv) ^ 2) ^ 0.5)/
(Zekv + Zekv * Z0ekv/(Zekv + Z0ekv))) * Ib = 2.6620 - 8.1925i = 8,61 кА
4.1 Розрахунок однофазного КЗ
. . = 0.3667 - 1.1327i = (-0.5 +0.886 j) a2 = (-0.5-0.866j) = Ia * a2 = -1.1643 + 0.2488i = Ia * a = 0.8202 + 0.8913i = Ia * a = 0.8202 + 0.8913i = Ia * a2 = -1.1643 + 0.2488i =-Ia * (Zekv + Z0ekv) = -0.5376 - 0.1666i = Ia * Z0ekv = 0.1561 + 0.0455i = Ia * Zekv = 0.3816 + 0.1211i = Ia * ((a- a2) * Zekv + (1-a2) * Z0ekv) = -0.0174 + 0.8719i = Ia * ((a2-a) * Zekv + (1-a) * Z0ekv) = 0.4865 - 0.7385i = Ua1 * a2 = 0.1246 + 0.5489 i = Ua2 * a = -0.2980 + 0.2775i = Ua1 * a = 0.4164 - 0.3931i = Ua2 * a2 = -0.0860 - 0.3910i
4.2 Розрахунок двофазного КЗ
= 0
Ia1 = Eekv/(Zekv * 2) = 0.4358 - 1.3643i = Ia1 * (a2-a) = -2.3631 - 0.7547i = Ia1 * Zekv = 0.4596 + 0.1438i = Ua2 = Ua1 * 2 = 0.9192 + 0.2876i = Ia1 * a2 = -1.3994 + 0.3048i = Ia1 * a = 0.9636 + 1.0595i =-Ib = 2.3631 + 0.7547i = Ua1 * a2 = -0.1053 - 0.4699i = Ua1 * a = -0.3543 + 0.3261i
4.3 Двохфазний КЗ на землю
= 0
Ia1 = Eekv/(Zekv + Zekv * Z0ekv/(Zekv + Z0ekv)) = 0.6841 - 2.1147i =-Ia1 * Zekv/(Zekv + Z0ekv) = -0.4968 + 1.5007i =-Ia1 * Z0ekv/(Zekv + Z0ekv) = -0.1874 + 0.6140i = Ia1 * a2 + Ia2 * a + Ia0 = -3.4420 - 0.1116i = Ia1 * a + Ia2 * a2 + Ia0 = 2.8922 + 1.9573i = Ia1 * a2 = -2.1734 + 0.4649i = Ia1 * a = 1.5316 + 1.6635i = Ia2 * a2 = 1.5480 - 0.3202i = Ia2 * a = -1.0812 - 1.1905i =-Ia1 * Zekv * Z0ekv/(Zekv + Z0ekv) = -0.2068 - 0.0618i = Ia2 * Zekv = -0.5056 - 0.1641i = Ia0 * Z0ekv = -0.0846 - 0.0231i = Ua1 * a2 = 0.0499 + 0.2100i = Ua1 * a = 0.1581 - 0.1524i
