Electricity distribution systems are experiencing outages due to a phenomenon known as local voltage collapse. Local voltage collapse is occurring in part because modern air-conditioner compressor motors are much more susceptible to stalling during a voltage dip than older motors. These motors can stall in less than three cycles (0.05 s) when a fault, for example, on the subtransmission system,...

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The paper presents voltage stability analysis of radial distribution networks. A new voltage stability index is proposed for identifying the node, which is most sensitive to voltage collapse. Composite load modelling is considered for the purpose of voltage stability analysis. It is also shown that the load ̄ow solution of radial distribution networks is unique. q 2000 Elsevier Science Ltd. All...

Maintaining voltage stability is an important factor in modern power system study and operation. Supplementing the with reactive (VAr) support devices such as FACTS helps to overcome instability issues. Commonly, dynamic optimization based method employed Voltage Stability Analysis (VSA) of system. The existing approach has dependencies on availability specific tools model perform VSA. Besides,...

A voltage collapse event is complex and localized in nature, but its effect is extensive. A vital effect of voltage collapse is total system collapse or blackouts, which will result in a significant loss to utility companies. Online monitoring of power system stability has thus become an important factor for electric power utilities. The final resort prevent the occurrence of a voltage collapse...

In order to test and verify the phenomena of power system voltage collapse, this article chooses a single-load infinite-bus single-machine as sample systems based on PS-5G carry out stability physical tests, an induction motor adjustable resistor are used constitute comprehensive load. The results show that in system, with decrease resistance gradually, load active is gradually increasing bus d...

Today an average transmission line is loaded more heavily than ever before and this has given rise to serious problem of voltage instability. A noble method for power system voltage instability estimation and improvement using ANN is presented. The method is based on the fact that reactive power injections at critical buses of the power system help to steer the system away from a developing vol...