Session 4: Introducing Power Electronics In this session you Learn how to use power electronics components Learn how to use transformers Change initial conditions of a circuit The Power System Blockset has been designed to simulate power electronic devices. In this session, you build a simple circuit using thyristors. Consider the circuit shown below. It represents one phase of a static var compensator (SVC) used on a 735 kV transmission network. On the secondary of the 735 kV /16 kV transformer, two variable susceptance branches are connected in parallel: one thyristor controlled reactor (TCR) branch and one thyristor switched capacitor (TSC) branch.