In this paper, rotor stability performance details of a grid connected type-1 wind turbine generator (WTG) system are presented. Small-signal and transient stability analyses are carried out including the models of the turbine-generator shaft system to show that the torsional modes natural to the shaft system gets excited only when the system exhibits rotor speed instability. This observation will be very useful when analyzing the subsynchronous resonance performance of wind turbine systems connected to a series capacitor compensated transmission system. Further, it is demonstrated that an active stall control offers a way to improve large disturbance stability of the system.
The development of automatic Power management system is presented in this paper. The power management system is consists of WIFI Digital Power meters installed in every consumer unit and an Electricity e-Billing system at the energy provider side. The WI-FI Digital Power meter (ZPM)
is a single phase digital kWh power meter with embedded WIFI modem which utilize the Wireless sensor network to send its power usage reading using information back to the energy provider wirelessly. In Power management system the priority will be given to the devices depends upon our requirement.
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