Abstract
Distributed static series compensators (DSSCs) are power-electronics devices that can inject positive or negative reactive impedance into a transmission line by connecting to it in series through a transformer suspended from the line. This paper presents a method for linearizing a transmission network, allowing the relationships between the network operating points and the injected reactances to be easily derived and thereby illuminating how best to deploy DSSCs. The model, which is general and applies to arbitrarily complex systems, is simplified into a form that provides additional insights without knowledge of the system topology or operating state. Using standard IEEE test systems, examples are given where DSSCs are used to raise load bus voltage, reduce line current, or reduce generator reactive power.
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