Static Var Generator (SVG)

Fast, accurate and intelligent reactive power compensation scheme

– No over compensation, no under compensation, no resonance
– Reactive power compensation effect
– PF0.99 level reactive power compensation
– Three-phase unbalance compensation
– Capacitive inductive load-1~1
– Real-time compensation
– Dynamic response time less than 50us
– Modular design

Excellent filtering performance

Modular design

Multiple compensation modes

Use high-end components

Safe and reliable

Static Var Generator(SVG) Static Var Generators (SVGs) are devices used in electrical power systems to control voltage, power factor and stabilize the system. They are a type of Static Synchronous Compensator (STATCOM) that use a voltage source converter to inject reactive power into the grid. SVGs are able to provide fast-acting reactive power compensation, which improve power quality and help to prevent voltage instability. SVGs are commonly used in industrial plants, wind farms and other applications where reactive power compensation is required. It is a reliable and efficient solution for maintaining the stability and quality of electrical power systems.

Working Principle

Static Var Generator (SVG)

The principle of the SVG is very similar to that of Active harmonic Filter, When the load is generating inductive or capacitive current, it makes load current lagging or leading the voltage. SVG 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 means fundamental power factor is unit.YIY-SVG is also capable of correcting load imbalance.

Product Advantage
	Capacitor Banks or Reactor Banks	Static Var Generators
Response time	Contactor - based solutions take at least 30s to 40s to mitigate the problem and thyristor - based solutions 20ms to 30ms	Real - time mitigation of power quality problems as the overall response time is less than 100µs
Output	Depends on step sizes, cannot match load demand in real time Depends on grid voltage as capacitor units & reactors are used	Instantaneous, continuous, stepless and seamless Grid voltage fluctuation has no influence on the output
Power factor correction	Capacitor banks needed for inductive loads and reactor banks for capacitive loads. Problems in systems with mixed loads Not possible to guarantee unity power factor as they have steps, system will be having continuous over and undercompensation	Corrects simultaneously from - 1 to +1 power factor of lagging (inductive) and leading (capacitive) loads Guaranteed unity power factor at all times without any over or undercompensation (stepless output)
Design & sizing	Reactive power studies needed to size the proper solution Usually oversized to better adjust to changing load demands Need to be designed taking into account system harmonics Custom - built for specific load and network conditions	Not required extensive studies as it is adjustable Mitigation capacity can be exactly what load demands Unaffected by harmonic distortion in the system Can adapt to load and network conditions & changes
Resonance	Parallel or series resonance can amplify currents in the system	No risk of harmonic resonance with the network
Overloading	Possible due to slow response and/or variation of loads	Not possible as current limited to max. RMS current
Footprint & installation	Medium to large footprint, especially if several harmonic orders Not simple installation, especially if loads upgraded frequently	Small footprint and simple installation as modules are compact in size. Existing switchgear can be used
Expansion	Limited and depends on load conditions and network topology	Simple (and not dependant) by adding modules
Maintenance & lifetime	Using components that need extensive maintenance like fuses, circuit breakers, contactors, reactors and capacitor units Switching, transients and resonance reduce lifetime	Simple maintenance and service life up to 15 years as there is no electro - mechanical switching and no risk of transients or resonance

TECHNICAL PARAMETER

STATIC VAR GENERATOR (SVG)

Type：single phase 220V Series，three phase 400V / 220V Series，500V Series，690V Series
Network：Single phase / 3 phase 3 wire / 3 phase 4 wire
Rated frequency：50Hz/60Hz
Response time：<10ms
Reactive power compensation rate：>95%
Rated compensation capacity：5KVar~400KVar