Online Video Courses: Power System Dynamics (NPTEL-INDIA)

Power system stability is understood as the ability to regain an equilibrium state after being subjected to a physical disturbance. Three quantities are important for power system operation:

 (i) angles of nodal voltages δ, also called power or load angles;

 (ii) frequency f ;

 and (iii) nodal voltage magnitudes V. 

These quantities are especially important from the point of view of defining and classifying power system stability. Hence power system stability can be divided into: 

(i) rotor (or power) angle stability; 

(ii) frequency stability;

 and (iii) voltage stability.

As power systems are nonlinear, their stability depends on both the initial conditions and the size of a disturbance. Consequently, angle and voltage stability can be divided into small- and large-disturbance stability.

Power system stability is mainly connected with electromechanical phenomena. However, it is also affected by fast electromagnetic phenomena and slow thermodynamic phenomena. Hence, depending on the type of phenomena, one can refer to short-term stability and long-term stability.

Lectures in this course: 40

1 - Introduction to Power System Stability Problem - Part-1 [52:08]  2 - Introduction to Power System Stability Problem - Part-2 [52:19]  3 - Introduction to Power System Stability Problem - Part-3 [41:55]  4 - Solution of Switching Equation [59:17]  5 - The Equal Area Criterion for Stability - Part-1 [52:42]  6 - The Equal Area Criterion for Stability - Part-2 [57:35]  7 - Transient Stability Analysis of a Multi Machine System [51:33]  8 - Modeling of Synchronous Machine - Part-1 [55:12]  9 - Modeling of Synchronous Machine - Part-2 [55:42]  10 - Modeling of Synchronous Machine - Part-3 [58:09]  11 - Modeling of Synchronous Machine - Part-4 [54:21]  12 - Synchronous Machine Representation for Stability Studies - Part-1 [55:44]  13 - Synchronous Machine Representation for Stability Studies - Part-2 [56:09]  14 - Excitation Systems - Part-1 [58:11]  15 - Excitation Systems - Part-2 [52:14]  16 - Modeling of Excitation Systems - Part-1 [56:40]  17 - Modeling of Excitation Systems - Part-2 [56:28]  18 - Small Signal Stability of a Single Machine Infinite Bus System - Part-1 [52:16]  19 - Small Signal Stability of a Single Machine Infinite Bus System - Part-2 [55:16]  20 - Small Signal Stability of a Single Machine Infinite Bus System - Part-3 [57:35]  21 - Small Signal Stability of a Single Machine Infinite Bus System - Part-4 [58:33]  22 - Small Signal Stability of a Single Machine Infinite Bus System - Part-5 [56:45]  23 - Dynamic Modeling of Steam turbines and Governors [51:38]  24 - Dynamic modeling of Hydro Turbines and Governors [47:02]  25 - Load modeling for Stability Studies [55:20]  26 - Numerical Integration Methods for Solving a Set of Ordinary Nonlinear Differential Equation [58:16]  27 - Simulation of Power System Dynamic Response [53:46]  28 - Dynamic Equivalents for Large Scale Systems - Part-1 [57:31]  29 - Dynamic Equivalents for Large Scale Systems - Part-2 [55:42]  30 - Dynamic Equivalents for Large Scale Systems - Part-3 [52:23]  31 - Direct Method of Transient Stability Analysis - Part-1 [55:57]  32 - Direct Method of Transient Stability Analysis - Part-2 [58:19]  33 - Sub Synchronous Oscillations - Part-1 [58:38]  34 - Sub Synchronous Oscillations - Part-2 [58:46]  35 - Voltage Stability - Part-1 [57:44]  36 - Voltage Stability - Part-2 [57:15]  37 - Voltage Stability - Part-3 [1:00:02]  38 - Voltage Stability - Part-4 [59:07]  39 - Methods of Improving Stability - Part-1 [1:00:13]  40 - Methods of Improving Stability - Part-2 [52:50]