Emulation of Series and Shunt Reactor Compensation

In the case of large systems of transmission lines with multiple generators which are connected in parallel, sometimes it is essential to use a series reactor in order to prevent large current flow if a short-circuit occurs. This approach protects the conductors of the transmission line and switching circuits from any damage which might result because of the high currents and also the forces, which can be produced in the case of a short circuit. Shunt reactors are connected in parallel with the transmission line or the other loads. A series reactor is usually connected between the load and the source. An emulator that can simulated all of this was used in this paper.The emulator of the transmission lines used in this paper is HVAC transmission line which is 180 km long. The transmission line can be used in the emulator as a 3-phase of 180 km length or as a single phase transmission line which is 540 km long. The transmission line is divided into 6 π sections and each π section is 30 km long. The line inductance is examined for every 30 km and the line capacitance is for every 15 km. The line parameters (RLC) of the 400 kV transmission line are: 0.02978 Ω/km, 1.06 mH/km and 0.0146 µF/km, respectively. The actual power which is carried by the transmission line is 250 W.