in methods presented to calculate the voltage collapse point, the transmission system is usually the only part of the power system that is completely modeled. distribution systems are often replaced by aggregate load models because the use of the detailed model of distribution systems in voltage stability analysis not only increases the computation time, but also decreases the probability of co...

The fly back converter has been widely used for multi outputs due to the simple structure and low cost in low-power applications. This paper presents a new multi output converter. It consists of a half-bridge inverter with boost converter in primary side and a fly back rectifier that is integrated with an auxiliary buck converter in secondary side. The boost converter is used to generate high v...

Generators typically regulate terminal voltage via automatic voltage regulator and exciter equipment. The desired high side (transmission side) voltage schedule is usually maintained by the power plant operator or by slow SCADA-type process control computers. Power system dynamic performance, however, can be improved by faster regulation of the transmission voltage. Contrasted to generators, st...

this paper presents a control strategy for fuel cell/energy storage power generation system during voltage sag conditions. the hybrid dc power sources are connected to grid using power electronic converters include dc-dc converter and grid connected voltage source inverter. the power from hybrid power sources is controlled during voltage sag by designing of control strategy for dc-dc converter....

As an important form of distributed renewable energy utilization and consumption, the multi-parallel inverter microgrid system works in both isolated grid-connected operation mode. Secondary-frequency voltage-regulation control are very solving problems that appears these systems, such as secondary-frequency regulation real-time scheme, voltage reactive power balancing, under disturbances unbal...

Degradation of the dc-link capacitance due to aging, cell failure, and fuse failure has a negative impact on ac-side current THD distribution static compensator (D-STATCOM) power quality. These variations noticeably increase modulation index voltage ripple leading growing D-STATCOM. To solve this problem, article proposes modification mechanism as secondary control layer added common structure,...