Power Systems Analysis II

The course is divided into three major parts:

- Fault analysis in three-phase electrical power systems

- Economic operation and control of power systems

- Introduction to power system stability

The first part analyzes symmetrical and asymmetrical faults based on symmetrical components using power (in)variant transformation. To apply symmetrical components, particular time will be spent on the sequence circuits of the system components. Special attention will be paid to sequence network derivations for star/delta loads, transformers, overhead lines, and generators. Moreover, extended material time on transformers and transformer groups will be provided and dedicated.

The second part, the economic operation, involves the minimization of fuel costs, while the power system control deals with the primary and secondary control of the generating units to enable stable operation and maintain constant grid frequency.

Finally, in the third part, the stability of the power system after faults is studied by applying the equal-area criterion. As an example, a case of having an HVDC system connected to an AC system will be analysed to examine the transient system's stability.

Numerous exercises are studied related to realistic networks, which can be utilized in other subjects in the electrical power systems track.