Abstract Inter-area oscillations are, by far, the most detrimental oscillation category to integrity of synchronously interconnected power systems. are characterized inherent weak damping. The poor damping associated with inter-area leaves open wide probabilities for irrevocable widespread blackouts consequent eventual devastating outcomes measured in terms huge economic casualties and possible...

In Japan, low-frequency oscillations have been observed on trunk transmission systems, and have been the subject for studies in fields of operation, control, and devices by many power system utilities. Power system stabilizers (PSS) are very effective controllers in enhancing the damping of low-frequency oscillations, since the controllers can increase damping torque for inter area modes by int...

The success of an ENSO-based statistical rainfall prediction scheme and the in#uence of ENSO on Australia are shown to vary in association with a coherent, inter-decadal oscillation in surface temperature over the Paci"c Ocean. When this Inter-decadal Paci"c Oscillation (IPO) raises temperatures in the tropical Paci"c Ocean, there is no robust relationship between year-to-year Australian climat...

Neuronal interactions form the basis for our brain function, and oscillations and synchrony are the principal candidates for mediating them in the cortical networks. Phase synchrony, where oscillatory neuronal ensembles directly synchronize their phases, enables precise integration between separated brain regions. However, it is unclear how neuronal interactions are dynamically coordinated in s...

Unlike the existing views that was introduced the existence of delay caused by the transmission of wide area measurement system data (WAMS) into the controllers input of the power oscilation damping (POD) by communication networks as a reason for poor performance of the POD controllers. This paper shows that the presence of time delay in the feedback loop may improve the performance of a POD co...

The concept of phasor measurement and its application in power system monitoring and control are introduced in this paper. The example of application of PMU in a Campus Wide Area Monitoring System (WAMS) is then elaborated. With the availability of synchrophasor data measurement, it makes possible to establish the power system monitoring by directly employing spectral analysis of power or phase...

Wide-Area Power System Stabilizers (WAPSSs) are damping controllers used in power systems that employ data from Phasor Measurement Units (PMUs). WAPSSs capable of providing high rates for the low-frequency oscillation modes, especially inter-area modes. Oscillation modes can destabilize if they not correctly identified and adequately damped. However, WAPSS communication channels may be subject ...

In this article, we present a mathematical theory of the Walker circulation of the large-scale atmosphere over the tropics. This study leads to a new metastable state oscillation theory for the El Niño Southern Oscillation (ENSO), a typical inter-annual climate low frequency oscillation. The mathematical analysis is based on 1) the dynamic transition theory, 2) the geometric theory of incompres...

This paper considers the decentralized turbine-governor control design for the damping of low-frequency, inter-area oscillations in electric power systems. A time-varying model that explains oscillations caused by parametric resonance is employed to design a controller. A robust turbine-governor controller design is presented on the basis of the model. Furthermore, a basic idea for incorporatin...