Description
In this project to improve power factor of transmission lines using static variable compensator. These were inefficient and because of large rotating parts they got damaged quickly. Static VAR Compensation under FACTS uses TSC (Thyristor Switched Capacitors) based on shunt compensation duly controlled from a programmed microcontroller.
This proposed system demonstrates power factor compensation using thyristor switched capacitors. The time lag between the zero voltage pulse and zero current pulse duly generated by suitable operational amplifier circuits in comparator mode are fed to two interrupt pins of the 8 bit microcontroller of 8051 family. Prior to the implementation of static variable compensator, power factor compensation was done by large rotating machines such as synchronous condenser or switched capacitor banks.
Shunt capacitive compensation – This method is used to improve the power factor. Whenever an inductive load is connected to the transmission line, power factor lags because of lagging load current. To compensate for this, a shunt capacitor is connected which draws current leading the source voltage. The net result is improvement in power factor.
Thereafter program takes over to actuate appropriate number of opto-isolators duly interfaced to back to back SCRs. Further the project can be enhanced to thyristor controlled triggering for precise PF correction instead of thyristor switching in steps. This result in bringing shunt capacitors into the load circuit to get the power factor till it reaches unity.
HIGHLIGHTS
- In this project to improve power factor of transmission lines using static variable compensator.
- This proposed system demonstrates power factor compensation using thyristor switched capacitors
- The time lag between the zero voltage pulse and zero current pulse duly generated by suitable operational amplifier circuits
- Thereafter program takes over to actuate appropriate number of opto-isolators duly interfaced to back to back SCRs
BLOCK DIAGRAM
HARDWARE REQUIREMENTS
- Microcontroller
- Opto-isolator
- SCR
- Zero crossing detector
- Inductive load and capacitors
SOFTWARE REQUIREMENTS
- Keil uVision 4
- Eagle
Munish Sethi, Ackland(NEWZEALAND) –
Well i got the flexible AC transmission system by static variable compensator project n was surprised to see it delivered in such a good condition. I was afraid that sending a delicate circuit in through international shipping may damage it, but their packaging is extremely good. If we got any queries then they will also provide video call /telephonic support. I also suggest to my friends.