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Power Factor Correction

  

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Call Us:1300 387 326

 


  

Static Var Generators (SVG)


The Sinexcel SVG represents the latest generation technology in Power Factor Correction solutions. By eliminating the need for switched capacitors and providing dynamic step-less compensation, the SVG is a totally modern solution that offers high performance in a compact package and requires very low maintenance.


Benefits


Save money on electricity costs

If your billing has changed to a kVA demand tariff and you have poor power factor, you are definitely paying for electricity that you are not using. In such cases, the SVG will reduce your electricity bills.

Typically, most installations achieve savings of 10%-30%.

> Learn more about how you can reduce your electricity costs with PFC systems

 

ROI (Return on Investment)

It makes great financial sense to invest in SVG technology. Typically, our customers achieve a ROI of 6 months – 2 years. After this period, they benefit from on-going cheaper electricity costs permanently.

 

Reduced Burden on Infrastructure

The SVG reduces heat on the electrical system, resulting in greater longevity and lower maintenance costs.

 

Can work with & enhance existing Capacitor Bank Systems

If you already have an existing capacitor bank PFC system, you can add an SVG to improve the performance achieved.

 

Space saving

  • Modular, compact & light weight

  • Takes up minimum real-estate in switch room

  • Can be integrated into switchboard

 

Easily expandable

  • Just add modules to increase capacity

  • Up to 100kVAr available in a wall mount solution

  • ​Up to 600kVAr available in a single tier cabinet configuration


 

How does the SVG work?


The Sinexcel SVG operates by detecting the load current on a real-time basis through external CT’s and determining the reactive content of the load current. The data is analysed and the SVG’s controller drives the internal IGBT’s by using pulse width modulation signals to make the inverter produce the exact reverse reactive current of the corresponding load reactive content.

This is injected to the grid to compensate the reactive content of the load current. By adjusting the output voltage amplitude and phase angle or by directly controlling the AC side current, the SVG can absorb or generate VAr according to the load reactive power or the grid voltage level.

 

Key Features:


Excellent power factor correction performance

  • Can maintain a PF of 0.99 lagging or unity if required

  • Corrects lagging (inductive loads) AND leading (capacitive loads) power factor (-1 to +1)

  • Not affected by resonance

  • Can operate at low voltages

 

Eliminating the weakest link – the capacitors

The most vulnerable and weakest link in a traditional PFC system are the switched capacitors. Capacitors can leak, rupture or ignite & have life expectancy of 3-7 years, depending on environmental conditions, resulting in high maintenance costs. The SVG eliminates the need for capacitors, resulting in greater longevity and minimal maintenance costs.

 

Dynamic step-less compensation

Traditional switched capacitor PFC systems have a response time of 20ms-40s, depending on the use of a solid state switch or a contactor. Most units use contactors resulting in a 30-40s response time.
They then respond in steps of 50, 25, 12.5 or 6.25 kVAr. 

Therefore, often by the time the unit responds, the power factor has changed and then they inject a fixed quantity of reactive current depending on the step. This results in the system perpetually either under-compensating or over-compensating (chasing the load).
 

 

The Sinexcel SVG profiles the load and operates with a response speed of <15ms (Dynamic reaction time is less than 50μs). It is a virtually real-time instantaneous response and it only injects the kVAr that is required in that moment. Therefore, the SVG is never over-compensating or under-compensating.

Corrects load imbalance
Measures all 3 phases and provides specific dynamic kVAr compensation each phase.


 

Sinexcel SVG vs Switched Capacitor PFC System


We recommend the Sinexcel SVG units, which represent the latest generation of PFC technology.

The older technology uses banks of switched capacitors to improve your Power Factor. However, capacitors typically fail within 3-7 years.

To ensure that these units keep performing optimally, you need regular inspections, parts replacement and ultimately high maintenance costs.

The SVG is a totally modern electronic solution which does not use switched capacitors, provides the highest possible performance and requires very low maintenance.

 


Sinexcel SVG
 

 


Switched Capacitor PFC
 


Performance

   
  • Modern technology
  • Excellent performance
  • Can maintain a PF of 0.99 lagging
     
 
  • Technology more than 25 years old
  • Comparatively poor performance
  • Cannot maintain a constant PF for extended periods
     


Response Time

   
  • Virtually real time, instantaneous step-less compensation
  • Response time <15ms
  • Dynamic response time <50µs
  • Avoids over-compensation & under-compensation
     
 
  • Comparatively very slow response time of 20ms-40s, depending on use of solid state switch or contactor
  • Most units use contactors resulting in 30-40s switching time (often by the time the unit responds, the power factor has changed)
  • Responds in steps of 50, 25, 12.5 or 6.25 kVAr
  • Perpetually either under-compensating or over-compensating (chasing the load)
     


Capacitor Issues

   
  • No switched capacitor banks, therefore no capacitor issues
  • Low maintenance costs (negligible)
     
 
  • Uses switched capacitor banks
  • Capacitors have life expectancy of 3-7 years, depending on environmental conditions
  • High maintenance costs
     


Load Imbalance

   
  • Corrects load imbalance
     
 
  • Does not correct load imbalance
     


Versatility

   
  • Compensates for both leading (capacitive loads) and lagging power factor (inductive loads)
  • Can work with Switched Capacitor System to eliminate over-compensation & under-compensation
     
 
  • Can ONLY compensate for lagging power factor (inductive loads)
     


Resonance

   
  • Not affected by resonance
     
 
  • Affected by resonance, degrades the capacitors
     


Grid voltage

   
  • Not influenced by grid voltage
     
 
  • Capacitor output is subject to grid voltage
  • Low grid voltage leads to under-compensation, possible fault conditions
     


Physical Size

   
  • Modular, compact & light weight
  • Takes up minimum real estate in switch room or switch board
  • Up to 600kVAr from a single tier cabinet configuration
     
 
  • Limited by function tray options
  • Takes up a lot of room due to need to accommodate capacitor bank
  • Limited to 300kVAr from a single tier cabinet configuration
     


Installation and commissioning

   
  • Easy to commission (‘Plug and Play’)
  • Self-diagnostics
     
 
  • Comparatively more complex commissioning process, usually requiring technical expertise
     


Sizing

   
  • Compensation capacity is the same as the installed capacity
  • Capacity may be 20%-30% less than standard switched capacitor system
     
 
  • To better suit changing dynamics of the load, usually needs to be over-sized with greater number of small steps
  • Increases cost significantly
     

 

> What is Power Factor?

> Why do we need Power Factor Correction?

> SVG brochure

> Contact Fuseco for more information