A thyristor-controlled series capacitor, or TCSC, is a power transmission device that inserts a controllable capacitive or inductive impedance in series with a transmission line to regulate how much power flows along it. It consists of a fixed series capacitor connected in parallel with an inductor that is switched by a pair of anti-parallel thyristors, letting an operator vary the effective series reactance of the line smoothly rather than only in fixed steps. Unlike a static VAR compensator, which connects in parallel, or shunt, to a line, a TCSC connects in series with it, and by continuously adjusting impedance it can damp power oscillations, improve voltage regulation, balance loading between parallel transmission paths and reduce transmission losses. It belongs to the family of flexible AC transmission system, or FACTS, devices that transmission operators use to control power flow without building new lines.
Facts
Classification
MaturityTRL 9: Actual System Proven in Operational Environment 1 Technology TypeFACTS device (series compensation) 1 Sources
1. Wikipedia: Flexible AC transmission system
WikipediaSeries compensation devices section
One type of series compensation is the Thyristor-Series Capacitor (TSC), which combines the TCR from an SVC in parallel with a traditional fixed series capacitor.
In Group: Reactive Power and Voltage Control, Lead
In electrical engineering, a flexible alternating current transmission system (FACTS) is a family of power-electronic based devices designed for use on an alternating current (AC) transmission system to improve and control power flow and provide dynamic voltage support.
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