Autonomous power system for island or grid-connected wind turbines in distributed generation

2008 ◽  
Vol 18 (7) ◽  
pp. 658-673 ◽  
Author(s):  
Grzegorz Iwanski ◽  
Wlodzimierz Koczara
Keyword(s):  
Power System ◽  
Distributed Generation ◽  
Wind Turbines ◽  
Autonomous Power System

scholarly journals Optimizing Capacities of Distributed Generation and Energy Storage in a Small Autonomous Power System Considering Uncertainty in Renewables

Energies ◽  
2015 ◽  
Vol 8 (4) ◽  
pp. 2473-2492 ◽  
Author(s):  
Ying-Yi Hong ◽  
Yuan-Ming Lai ◽  
Yung-Ruei Chang ◽  
Yih-Der Lee ◽  
Pang-Wei Liu
Keyword(s):  
Energy Storage ◽  
Power System ◽  
Distributed Generation ◽  
Autonomous Power System

Increasing the regulating ability of a wind turbine in a local power system using magnetic continuous variable transmission

2018 ◽  
Vol 42 (5) ◽  
pp. 411-435 ◽  
Author(s):  
Sergey N Udalov ◽  
Andrey A Achitaev ◽  
Alexander G Pristup ◽  
Boris M Bochenkov ◽  
Yuri Pankratz ◽  
...  
Keyword(s):  
Power Systems ◽  
Power System ◽  
Wind Turbine ◽  
Wind Turbines ◽  
Continuously Variable Transmission ◽  
Local Power ◽  
Diesel Generator ◽  
Gas Turbine Unit ◽  
Variable Transmission ◽  
Autonomous Power System

The paper is devoted to investigations of dynamic processes in a local power system consisting of wind turbines with a magnetic continuously variable transmission. Due to low inertia of wind turbine generator rotors, there is a problem of ensuring dynamic stability at sharp load changes or at short circuits in an autonomous power system. To increase dynamic stability of the system, two algorithms for controlling a magnetic continuously variable transmission are presented. The first algorithm stabilizes a rotation speed of the high-speed rotor of a magnetic continuously variable transmission from the generator side in a local power system consisting of wind turbines with uniform synchronous generators with permanent magnets having equal moments of inertia. Undoubtedly, local power systems having only the wind turbines with equal mechanical inertia time constants are not widely used due to stochastic nature of wind energy. Therefore, wind power systems are combined with a diesel generator or a gas-turbine unit. Investigations show that the use of the only speed stabilization algorithm is not enough for such power systems, because there is a possibility for occurrence of asynchronous operation under specific power changes due to the difference in moments of inertia of generator rotors. Thus, the second algorithm uses the phase shift compensation in accordance with a primary generator in an autonomous power system consisting of non-uniform generators having different mechanical inertia time constants. As a primary generator, a diesel generator or a gas-turbine unit having a primary speed controller may be used. It should be noted that algorithms of stabilization for speed and phase angle are extended by an inertial circuit of aerodynamic compensation for torque of rotation from the wind turbine side to reduce loading on an energy storage unit of the magnetic continuously variable transmission at disturbances from the generator side and the turbine side.

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