Voltage stability study on radial distribution system incorporating Induction Motor loads

Anantharaman, Akshay; Singh, Divya Kumar; Raja, P. C. Kishore

doi:10.1109/icpeices.2016.7853219

Cited by 3 publications

(1 citation statement)

References 5 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…La variación se hace simultáneamente para la potencia activa y reactiva, variando ambas magnitudes en la misma proporción y conservando el mismo factor de potencia de la carga. Se considera una sobrecarga del 20% debido a que, según ejemplos presentados en [21] y [77], en una carga industrial el 60% puede corresponder a cargas de motores de inducción, entonces se asume que, para las cargas del sistema de referencia, el 60% son motores. Adicionalmente, se considera que los motores tienen una corriente de arranque de 5 veces la carga nominal, es decir, 60*5= 300%, pero según [20], si el arranque se hace con autotransformadores, la corriente de arranque en la línea podría reducirse a un 25% de la corriente de arranque directo, es decir, se reduciría a 300*0.25=75%; así, considerando el arranque de los motores y el 40% de carga que no corresponde a motores, se tendría un porcentaje de carga del 75%+40% = 115% ≈120%.…”

Section: Sensibilidad De Voltajes Frente a Variaciones De Cargas En Cada Nodounclassified

Small-disturbance angle stability analysis of microgrids: A graph theory viewpoint

Song

Hill

2015

2015 IEEE Conference on Control Applications (CCA)

View full text Add to dashboard Cite

In this Work, the formulation of a unified power quality index applied to radial distribution networks is presented. The index focuses on two quality phenomena, namely: voltage sag and voltage harmonic distortion, and allows quantifying the impact of connecting photovoltaic generation sources and non-linear loads, on these two phenomena.The formulation of the index is achieved from the parametric sensitivity analysis of the voltages in the network buses, depending on the system's line and load impedances variations and the location of the connection point of the photovoltaic source or non-linear load. The sensitivity analysis is developed using a proposed algorithm, based on the approach of the network equations and on a logical pattern of behavior that allows them to be resolved sequentially. The result of this analysis makes it possible to identify two determining factors for each quality phenomenon, with which, by means of a qualification methodology, the digits of two individual indices are raised that are later integrated into the unified index.The proposed index is applied to different case studies on the IEEE 33-node test feeder reference system, within which different ranges of load and line impedances variation are considered, the connection of a photovoltaic source with harmonic injection and the connection of a motor speed variator as a non-linear load. For these connections, it was identified that the level of penetration can deteriorate the quality, and that the connection of the non-linear load causes the greatest reduction in the quality of the nodes. The index allows nodes to be classified according to their power quality and is a useful, practical and easy-to-calculate tool.

show abstract

Section: Sensibilidad De Voltajes Frente a Variaciones De Cargas En Cada Nodounclassified