Title :
Assessment of errors introduced by common assumptions made in power system studies
Author :
Peralta, Jaime ; De León, Francisco ; Mahseredjian, Jean
Author_Institution :
Ecole Polytech. de Montreal, Montreal, QC, Canada
Abstract :
Power system studies using commercial or in-house developed software are performed making several assumptions. This paper analyzes the errors introduced by the most common modeling simplifications made for load-flow, short-circuit, and transient stability studies. Load-flow studies for transmission systems almost invariably rely on the positive-sequence approach. While this may be acceptable for most transmission system conditions, errors of up to 15% can be found by not considering the unbalanced nature of power systems components. Errors larger than 10% are found in short-circuit studies by using symmetrical components. Common assumptions also introduce differences in transient stability analysis. The results for the studied test case show differences of up to 14% in the determination of the maximum clearing time. With the current development status of computing hardware and available algorithms, more accurate modeling is currently available even for large systems.
Keywords :
load flow; power system transient stability; short-circuit currents; transmission networks; error assessment; load flow; positive-sequence approach; power system studies; short circuit; transient stability; transmission systems; Computational modeling; Load modeling; Loading; Mathematical model; Power system stability; Transient analysis; Electromagnetic Couplings; Multiphase Systems; Positive-Sequence; Short-Circuit; Transient stability; Transmission and Distribution Networks; Unbalanced Load-Flow;
Conference_Titel :
Power and Energy Society General Meeting, 2011 IEEE
Conference_Location :
San Diego, CA
Print_ISBN :
978-1-4577-1000-1
Electronic_ISBN :
1944-9925
DOI :
10.1109/PES.2011.6038966