Any ideas how to control Thyristor Controlled Series Capacitor using Labview ?

[powergroup]

What are the consideration a person has to take into account to design a controller TCSC so that it behaves in a capacitive and inductive modes? Thanks

[Bassett_Hound]

Powergroup,

You may want to post a little bit more about your intended application.  I know a TCSC is a power electronic device used to vary the series impedance of power transmission lines by varying the delay angle of the thryistors in the device.  If the inputs for the delay angle for the TCSC need to be updated deterministicallyyou might want to look into using LabVIEW Real-Time Software and Hardware to control the inputs.

However if project entails developing a feedback control scheme to vary the impedance of a transmission line using a TCSC based on a reference input you may be more interested in how LabVIEW would be able to develop the control scheme. I imagine you would want to take measurements to demonstrate the correctness of the TCSC controller based on this reference input which would also be a consideration.

Please post a little more about your application as it may help determine how to go about controlling your TCSC.  Thanks.

Bassett

[powergroup]

Thanks for the reply,
The intent of the TCSC is to vary the impedance of the transmission line, so that any present fault current would be limited. Initially, there is no fault and the TCSC should behave in a capacitive mode, increasing the capacitance of the line and hence increasing the power flow and the compensation. However, when the fault occurs, the TCSC should behave as an inductor, that would limit the fault current. The fault would be created manually and there is no need for detection devices. As I believe I need a control design that control my delay time and I want the line current to be the reference. Any ideas ?

[Bassett_Hound]

You can use the LabVIEW Real-Time Module with some RT series hardware and I/O hardware to create deterministic control applications to monitor a system. RT series hardware can handle the process variable measurements and the compensation sections of the control system. A LabVIEW application can then retrieve sensor measurement data from the hardware, compare set point and process variable data values, use control algorithms to processes the data, and output compensation data to the system compensation hardware.

So the key consideration for you would be what Control Algorithm you will need and what type of hardware you will need to measure and control your TCSC.  The Control Algorithm will depend on how you want  your system to react and the hardware would depend on the specifications of the TCSC, like the current/voltage needed for controls.  Did you have any specific Control Algorithm in mind?

S. Bassett