Power System Analysis Lecture Notes Ppt ❲PROVEN × 2024❳

| Fault type | Connection at fault point | |------------|---------------------------| | Single line-to-ground (SLG) | Z1, Z2, Z0 in series | | Line-to-line (L-L) | Z1, Z2 in parallel | | Double line-to-ground (DLG) | Z1 in series with (Z2∥Z0) |

Zero-sequence current cannot flow if transformer delta or ungrounded wye on source side. 7. Power System Stability (PPT Module 7) Definition: Ability to return to synchronous operation after a disturbance.

[ \textpu value = \frac\textActual value\textBase value ] power system analysis lecture notes ppt

[ I_a1 = \fracV_fZ_1 + Z_2 + Z_0 + 3Z_f ] [ I_f = 3I_a1 ]

Fault clears at angle ( \delta_c ). System stable if area ( A_1 ) (accelerating) = area ( A_2 ) (decelerating). | Fault type | Connection at fault point

| Line type | R (Ω/km) | L (mH/km) | C (nF/km) | |-----------|----------|-----------|-----------| | Short (<80 km) | lumped | ignored | ignored | | Medium (80–240 km) | lumped | lumped | lumped (π model) | | Long (>240 km) | distributed parameters | | | 4. Load Flow Analysis (PPT Module 4) Goal: Determine voltage magnitude & angle at each bus for given loads/generations.

Base quantities: ( S_base ) (3-phase MVA), ( V_base ) (line-to-line kV). [ \textpu value = \frac\textActual value\textBase value ]

Derived bases: [ I_base = \fracS_base\sqrt3 V_base, \quad Z_base = \frac(V_base)^2S_base ]