Power controller algorithm Design

[Aman Fiji]

Hey everybody, im new to this forum.
Anyways, I am trying working on a power control algorithm to give me a clean power output sourced from a wind turbine.

I am using a self-excited induction (SEIG) generator, where the 3-phase output is converted to single phase using C-2C combination of the capacitors.

With SEIG's, the output voltage and frequency are never constant (they are dependable on the wind speed). So, I need to use a controller to control the power for it to be of any use. I have decided to use a static-var compensator (SVC) which is common for low voltage (240v) applications.

Now, to my problem :( , the SVC is normally a huge system but i need a small one. Does anyone know how to build a SVC? I have already designed a control algorithm, using a robust technique called Proportional + integral + differential controller (PID).

Thanks, I would also appreciate other comments and advice.:)

[Mark Parsons]

Greetings Aman,

I have experimented briefly with SEIG using C-2C and plan for more experimenting as time permits. I am interested in seeing a successful application of SEIG for DIY wind energy. There is another thread just started by Tony Savage under the wind section dealing with this same issue and his experimental data and progress.

I'm not sure how a SVC will control your power harvesting from a wind turbine driven SEIG. If you have data correlating capacitance and voltage output at fixed RPM, please share with the group.

I would think a simple bridge rectifier on the SEIG single phase output and the resulting DC feeding into a DC-DC convertor or MPPT type charge controller or Grid-Tie inverter would perform an adequate job of harvesting the energy efficiently to either charge batteries or feed the grid. Size the motor to keep the output voltage in the acceptance range from cut-in RPM and furl appropriately.

The Windy Boy 2500W inverter from SMA-America handles 200 - 550VDC input and provides 240VAC grid tie power.
http://www.sma-america.com/solar-technology/products/windy-boy/windy-boy/index.html

Regards,
Mark