Low frequency power oscillations may be triggered by many events in the system. Most oscillations are damped by the system, but undamped oscillations can lead to system collapse. Oscillations develop as a result of rotor acceleration/deceleration following a change in active power transfer from a generator. Like the operations limits, the monitoring of power system oscillating modes is a releva...

Cascading failures in power systems propagate non-locally, making the control and mitigation of outages extremely hard. In this work, we use the emerging concept of the tree partition of transmission networks to provide a complete analytical characterization of line failure localizability in transmission systems. Our results reveal that the “bridges” of the tree partition play a crucial role in...

Transmission line failure in power systems prop-agate non-locally, making the control of resulting outages extremely difficult. In Part II this paper, we continue study localizability transmission networks and characterize impact cut set outages. We establish a Simple Path Criterion, showing that propagation pattern due to bridge outages, special case failures, are fully determined by positions...

The deficiency of secure and reliable electrical power is a constraint to firm performance its competitiveness in developing countries. Several countries the south Asian region face electricity shortages leading frequent outages. This study investigate effect outages on technical efficiency firms selected South employed stochastic frontier approach estimate firms. We use OLS Beta regression man...

But there is growing concern about the efficiency and fairness of transmission investment rules: in some regions lack of transmission investments has led to outages and thus to reliability problems. More than 90 percent of power outages in the system have their origins in transmission problems that could be substantially avoided with increased investment. The design of a regulatory framework fo...

A novel idea is proposed to forecast lost load and time interval between power outages based on the similarity series generated by a stochastic model actual series. The obeys power-law distribution, which can be described as process with long-range dependence (LRD). Fractional Brownian motion (fBm) LRD, we discretize differential equation (SDE) driven fBm difference iterative constructed for fo...

The computation of Total Transfer Capability (TTC) is a significant task in the deregulated environment. In this paper, Firefly (FF) algorithm is used to solve the Optimal Power Flow (OPF) based TTC problem. Real power output of generators in source area and real power load in drop area can be adjusted to obtain the maximum transfer capability. The value of TTC can be made more accurate by cons...