Modeling, parameter measurement and sensorless speed estimation of IPM synchronous generator for direct drive variable speed wind turbine application

2014 ◽  
Vol 25 (9) ◽  
pp. 1814-1830 ◽  
Author(s):  
Mujaddid Morshed Chowdhury ◽  
Md Enamul Haque ◽  
Debasish Das ◽  
Ameen Gargoom ◽  
Michael Negnevitsky
Keyword(s):  
Wind Turbine ◽  
Synchronous Generator ◽  
Parameter Measurement ◽  
Speed Estimation ◽  
Variable Speed ◽  
Direct Drive ◽  
Variable Speed Wind Turbine

Robust CRONE Design for a Variable Ratio Planetary Gearing in a Variable Speed Wind Turbine

2011 ◽  
Author(s):  
Benjamin Feytout ◽  
Patrick Lanusse ◽  
Jocelyn Sabatier ◽  
Serge Gracia
Keyword(s):  
Robust Control ◽  
Wind Turbine ◽  
Synchronous Generator ◽  
Variable Ratio ◽  
Variable Speed ◽  
Direct Drive ◽  
Variable Speed Wind Turbine ◽  
Pi Controllers ◽  
Control Methodology ◽  
Full Conversion

Most wind turbines installed have traditional architectures: double-fed asynchronous machine or direct drive with full conversion, both containing several levels of control composed of PI controllers. In our application, a robust 3rd-generation-CRONE controller is used to manage a planetary gearing ratio upstream of a synchronous generator directly connected to the grid. Thus, the speed of the low shaft is controlled and unlike other architectures, no system of power electronics is required for conversion. This CRONE approach is a robust control methodology based on fractional order differentiation.

Voltage stability enhancement using an adaptive hysteresis controlled variable speed wind turbine driven EESG with MPPT

2014 ◽  
Vol 25 (2) ◽  
pp. 48-60
Author(s):  
R. Jeevajothi ◽  
D. Devaraj
Keyword(s):  
Wind Turbine ◽  
Voltage Stability ◽  
Reactive Power ◽  
Synchronous Generator ◽  
Maximum Power ◽  
Induction Generator ◽  
Variable Speed ◽  
Maximum Power Point ◽  
Variable Speed Wind Turbine ◽  
Power Point

This paper investigates the enhancement in voltage stability achieved while connecting a variable speed wind turbine (VSWT) driven electrically excited synchronous generator (EESG) into power systems. The wind energy conversion system (WECS) uses an AC-DC-AC converter system with an uncontrolled rectifier, maximum power point tracking (MPPT) controlled dc-dc boost converter and adaptive hysteresis controlled voltage source converter (VSC). The MPPT controller senses the rectified voltage (VDC) and traces the maximum power point to effectively maximize the output power. With MPPT and adaptive hysteresis band current control in VSC, the DC link voltage is maintained constant under variable wind speeds and transient grid currents.The effectiveness of the proposed WECS in enhancing voltage stability is analysed on a standard IEEE 5 bus system, which includes examining the voltage magnitude, voltage collapse and reactive power injected by the systems. Simulation results show that the proposed WECS has the potential to improve the long-term voltage stability of the grid by injecting reactive power. The performance of this scheme is compared with a fixed speed squirrel cage induction generator (SCIG), a variable speed doubly-fed induction generator (DFIG) and a variable speed permanent magnet synchronous generator (PMSG).

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