Static Synchronous Compensator (STATCOM) is a device used in power systems to control voltage and reactive power. In the context of rail transit, STATCOM can serve several purposes:

Voltage Regulation:

STATCOM can regulate the voltage levels in the rail transit system, ensuring that they remain within acceptable limits. It can compensate for voltage drops or fluctuations caused by various factors such as system load changes, reactive power demand, or the use of regenerative braking.

Power Factor Correction:

Rail transit systems often have varying power factor loads due to the presence of electric motors, transformers, and other equipment. STATCOM can help correct the power factor to improve the overall energy efficiency of the system and reduce reactive power flow, thereby reducing power losses.

Reactive Power Compensation:

Electric rail systems consume significant amounts of reactive power, which can lead to voltage stability issues. STATCOM can provide dynamic reactive power compensation, injecting or absorbing reactive power as necessary to maintain system voltage stability and improve power quality.

Harmonic Mitigation:

The operation of rail transit systems can introduce harmonic distortion in the power supply, impacting the quality of electrical power. STATCOM can help mitigate harmonics by injecting counteractive harmonics to cancel out the undesired harmonics generated by the rail transit system.

Voltage Flicker Reduction:

Rail transit systems with electric locomotives or light rail vehicles can experience voltage flicker, which is a rapid and repetitive variation of voltage. STATCOM can smooth out the voltage fluctuations, reducing flicker and providing more stable power supply to sensitive equipment.

In summary, STATCOM in rail transit are used for voltage regulation, power factor correction, reactive power compensation, harmonic mitigation, and voltage flicker reduction. They help ensure the reliable and efficient operation of the rail system while maintaining stable and high-quality power supply.

We think the Medium(high) voltage Static Var Generator(SVG) and Statcom is the same product.