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Which of the following is the 2nd generation FACTs device?
SSSC
SVC
UPFC
IPFC
SSSC
FACTS devices are categorized by generation based on the power electronics technology employed. The 1st generation uses Thyristor-based controllers (e.g., SVC, TCSC), while the 2nd generation utilizes Voltage Source Converter (VSC) technology with GTOs or IGBTs, such as the Static Synchronous Series Compensator (SSSC).
FACTS devices are categorized by generation based on the power electronics technology employed. The 1st generation uses Thyristor-based controllers (e.g., SVC, TCSC), while the 2nd generation utilizes Voltage Source Converter (VSC) technology with GTOs or IGBTs, such as the Static Synchronous Series Compensator (SSSC).
VinjтАЛ=VqтАЛтИа╬╕
XeffтАЛ=XlineтАЛ┬▒XSSSCтАЛ
The SSSC functions as a series-connected synchronous voltage source. It injects a controllable voltage VqтАЛ in quadrature with the line current I, thereby effectively changing the line's impedance. By varying the magnitude and phase of the injected voltage using a VSC, it can provide both capacitive and inductive compensation to regulate power flow.
SSSC is a series-connected VSC-based FACTS device.
It acts as an adjustable reactance in series with the transmission line.
Unlike series capacitors, it does not suffer from sub-synchronous resonance (SSR) issues.
It provides rapid response and dynamic control of line impedance.
Independent control of real and reactive power flow
No sub-synchronous resonance risk
Fast response time for transient stability
Higher complexity and cost due to VSC components
Requires high-speed switching power electronics
Dynamic power flow control
Damping of power system oscillations
Voltage stability improvement
| Feature | 1st Gen (SVC) | 2nd Gen (SSSC) |
|---|---|---|
Technology | Thyristor-based | VSC-based |
SVC (Static Var Compensator) is 1st generation as it uses TCR/TSC.
UPFC and IPFC belong to the 3rd generation of FACTS devices, incorporating more advanced multi-converter configurations.
A is correct тАФ The SSSC is the primary example of a 2nd generation FACTS device utilizing Voltage Source Converter technology for series compensation.
Remember: 1st gen = Thyristor (SVC, TCSC); 2nd gen = VSC (SSSC, STATCOM); 3rd gen = Multi-converter (UPFC, IPFC).