good day all,
I am currently design a 3 phase excitation system for an induction generator for a wind turbine.
now, in order to regulate the system voltage i need to switch specific caps (or reactances depending if i use a TCSC etc etc) but i have opted for a purely capacitive scheme.
now in order to determine the difference between the voltage at the terminals, and the load (regulates the SEIG voltage - Self Excited Ind. Gen. ), i will implement voltage sensors, at the load side, and use an opto-isolater, and filter to be inputted to the µC. i will then scale this voltage out of 5 V , and use a difference to find the difference between this and the reference voltage,. then a look up table will be used to find the corresponding capacitance (to inc or dec the cap value at the IG terminals), depending on the voltage difference between ref and sensed (which then goes to a PI controller)
the problem I am experiencing at the moment is obtaining this look up table, i have read in multiple texts that the newton raphson method is used along with various motor parameters, and its eqv circuit
eg "CAPACITIVE VAR CONTROLLERS FOR INDUCTION GENERATORS FOR AUTONOMOUS POWER GENERATION", S.S. Murthy and Bhim Singh p2 (top left)
but i have no clue how to do this, and what it would require??
please help, or any guidance on such related material will be helpful!
Thank You (i know that my thread is lengthy lol)
Dushen Nagesur - Final Year Electrical Eng Student - UKZN,South Africa
I am currently design a 3 phase excitation system for an induction generator for a wind turbine.
now, in order to regulate the system voltage i need to switch specific caps (or reactances depending if i use a TCSC etc etc) but i have opted for a purely capacitive scheme.
now in order to determine the difference between the voltage at the terminals, and the load (regulates the SEIG voltage - Self Excited Ind. Gen. ), i will implement voltage sensors, at the load side, and use an opto-isolater, and filter to be inputted to the µC. i will then scale this voltage out of 5 V , and use a difference to find the difference between this and the reference voltage,. then a look up table will be used to find the corresponding capacitance (to inc or dec the cap value at the IG terminals), depending on the voltage difference between ref and sensed (which then goes to a PI controller)
the problem I am experiencing at the moment is obtaining this look up table, i have read in multiple texts that the newton raphson method is used along with various motor parameters, and its eqv circuit
eg "CAPACITIVE VAR CONTROLLERS FOR INDUCTION GENERATORS FOR AUTONOMOUS POWER GENERATION", S.S. Murthy and Bhim Singh p2 (top left)
but i have no clue how to do this, and what it would require??
please help, or any guidance on such related material will be helpful!
Thank You (i know that my thread is lengthy lol)
Dushen Nagesur - Final Year Electrical Eng Student - UKZN,South Africa