I would like to know the recent trend in the reactive power compensation by the help of TCR.So for the same if anybody have the paper for recent trend in the mentioned field then kindly reply.
As you rightly pointed out, TCR is a shunt connected device. It is used in a device named as Static VAR compensator (SVC) where TCR is connected in parallel with a thyristor switched capacitor (TSC) and a harmonic filter. TCR itself can be used in reactive power control in transmission lines but TSC provides smoother voltage control to the device. A superior device to the SVC is is Static Synchronous Compensator (STATCOM). For better understanding have a look at this paper- http://web.ing.puc.cl/~power/paperspdf/dixon/32.pdf.
To specifically understand the role of TCR in modern day reactive power control methods you can also check out my work here-