Voltage Regulation through Wide Area Voltage Control of HV/MV Transformers and Inverters’ Reactive Power Support

Voltage Regulation of Distribution Networks through Reactive Power Control

Until recent years, the connection of dispersed Independent Power Producers to electrical networks has not been a problem for utilities, due to the fact that installed power represented a small amount of the total power connected to the system. But in the last few years this scenario is changing and especially wind energy has turn out to be one of the most important and promising sources of ren...

On the inter-area optimal voltage and reactive power control

A Fast Voltage Collapse Detection and Prevention Based on Wide Area Monitoring and Control

Voltage stability is one of the most important factors in maintaining reliable operation of power systems. When a disturbance occurs in the power system, it usually causes instabilities and sometimes leads to voltage collapse (VC). To avoid such problems, a novel approach called Vector Analysis (VA) is proposed that exploits a new instability detection index to provide wide area voltage stabili...

Wide-Area Stability and Voltage Control

Bonneville Power Administration is investigating wide-area stability and voltage control. The control provides a flexible platform for rapid implementation of generator tripping and reactive power compensation for voltage support and stability. Features include phasor measurements, digital fiber optic communications, and fuzzy logic control. The control includes both fast and slow subsystems. T...

Low Voltage Ride Through Enhancement Based on Improved Direct Power Control of DFIG under Unbalanced and Harmonically Distorted Grid Voltage

In the conventional structure of the wind turbines along with the doubly-fed induction generator (DFIG), the stator is directly connected to the power grid. Therefore, voltage changes in the grid result in severe transient conditions in the stator and rotor. In cases where the changes are severe, the generator will be disconnected from the grid and consequently the grid stability will be attenu...