A Static Var Compensator (SVC) is a power electronic device that quickly controls reactive power in a power system, primarily to regulate voltage and improve power system stability. It does this by injecting or absorbing reactive power, acting as either a capacitive or inductive load, as needed. SVCs are a type of Flexible AC Transmission System (FACTS) device. Here's a more detailed description:Function:
- Voltage Regulation:SVCs maintain bus voltage magnitude by continuously adjusting reactive power output, especially during changes in reactive power loading.
- Reactive Power Control:They inject or absorb reactive power to stabilize voltage, particularly during system disturbances like short circuits or load changes.
- Power Flow Control:SVCs can also improve power transfer capability by regulating voltage and reducing losses.
- Stability Enhancement:They help mitigate active power oscillations and prevent overvoltages.