Advanced Static VAR Generator

What is ASVG?

 ASVG stands for Advanced Static Var Generator.
 ASVG acts as a current source that generates a compensation current working as a dynamic current source. It monitors the current phase angle and generates real time compensation current to achieve the set displacement power factor.
 Advanced static var generator, additionally monitors harmonics up to order of 15th Level and compensates the same on real time basis, thus improving the power quality.
 A correctly sized ASVG can not only correct displacement Power factor, but also it can reduce harmonics to <5% THDi.
 Dealing in both can result in true unity power factor.

Working Principle of ASVG

 When the load generates inductive or capacitive current, it makes load current lagging or leading the voltage.
 ASVG detects the phase angle difference and generates leading or lagging current into the grid, making the phase angle of current almost the same as that of voltage on the transformer side, which corrects the fundamental power factor to almost unity.
 ASVG draws the harmonic current from the supply grid in such a way that the magnitude of its current is same as that of the load side harmonic current, whereas its phase is opposite with respect to that of the load side harmonic current, which ensures that the effective value of the harmonic current on the supply side reduces to a negligible level.

Compensation of reactive power and harmonics with Selec ASVG

ompensation of series load balancing for 3P3W and 3P4W

 ASVG can correct unbalance between phase – phase and phase to neutral
 Therefore, ASVG is a perfect solution to reactive power compensation with unbalanced load
 ASVG detect the current of each phase, Even if the current is different in each phase, it individually feeds compensation current to each phase to improve the power factor.

Advantages of using ASVG

Improves power factor

Continuous and step-less compensation of power to maintain power factor >0.99. The compensation performance is much better than a traditional compensation device (capacitor).

Suppresses harmonics

Configures the required amount of reactive current in real- time and compensates the harmonic current (up to 15th order) drawn by the non linear loads.

Fast response

Fast configuration capability provides fast response time as low as 50 micro sec and full response less than 1 cycle.

Works under unbalance grid condition

Output current is not affected by the mains voltage fluctuation, providing stable support for mains voltage.

Modular design, easy extension

It is easy to expand the system as 8 modules can be connected in parallel. ASVG can also be used as a hybrid solution in combination with conventional capacitor based system.

Highly reliable and safe

Robust design for power system eliminates resonance problems, with no more amplified harmonic current and voltage. It extends components life cycle and protects the system.

Control and monitoring through ASVG

User can monitor and control the system parameters via Ethernet or serial communication.
Data logging and alarm can also be done User can monitor & control HMI screen using VNC software on PC or laptop.
Data can be monitored using selec IoT platform and can be accessed across the world.

Features of ASVG

 Controllable reactive current source
 Compensates current harmonics up to 15th order
 Stepless & precise control
 Compensates current unbalance created by the load
 Leading and lagging reactive power mitigation
 Individual correction of current on all three phases
 Instant response time of 50 micro sec & full response less than 1 cycle
 Modular arrangement – Parallel operation up to 8 modules
 Can be installed along with conventional APFC panel

Advantage of using ASVG over conventional Power factor correction system

TECHNICAL SPECIFICATION