Calculation of the extreme loading condition of a power system for the assessment of voltage stability
- Toronto Univ., ON (Canada). Dept. of Electrical Engineering
The extreme loading condition (XLC) of a power system is defined by assuming a load increase (according to a predefined pattern for both active and reactive powers) until a maximum is reached for anyone of the loads. The XLC is significant for the assessment of voltage stability. Its calculation, as presented in the paper, is based on increasing the load admittances while first keeping the generator voltage phasors constant and then adjusting these phasors for satisfying operational requirements with respect to the generation powers. The secant method is used for the efficient and reliable determination of the maximal value of the loading parameter {mu}, while for the voltage adjustment a fast convergent Newton module is employed. The XLC can be calculated for both normal operation and for contingencies. The new approach is fast and simple and can be used on large systems. Its features have been illustrated on the 39 bus New England test system. The calculation identifies the weakest bus where remedial action may be needed for voltage support.
- OSTI ID:
- 6003213
- Journal Information:
- IEEE Transactions on Power Systems (Institute of Electrical and Electronics Engineers); (USA), Vol. 6:2; ISSN 0885-8950
- Country of Publication:
- United States
- Language:
- English
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