Wall Mounted 200KVAR Static Var Generator modular SVG IGBT

Item No.: 00166
1. highly reliable solution for today’s networks characterised by significant increase in harmonics, voltage variations
2.The DSP controlled IGBT topology enables a perfect compensation on each phase for both inductive and capacitive loads.
Reducing you
Description
Description

WHAT IS POWER FACTOR?
Power factor is an expression of energy efficiency and is a measure of how effectively incoming power is used in your electrical system. It expresses the ratio of real power actually used in a circuit to the apparent power delivered to the circuit and is usually expressed as a number between 0 and 1. The higher the power factor, the more proportion of your supplied power is being used for useful work and the more efficient your site is at utilising the supplied power.

It’s important because you may be paying for power that you cannot use to power your equipment. Improving your power factor results in less current being drawn, less heat and greater longevity of your electrical system. Improving your power factor may also result in significant savings on your electricity costs.

Learn more about power factor


ARE YOU PAYING FOR ELECTRICITY THAT YOU ARE NOT USING?
Improving your power factor can result in considerable savings on your power bills. For example, think of a glass of beer, made up of the thirst-quenching liquid and the froth.
The drinkable liquid represents Real Power, the power that performs the actual work. Think of this as the satisfying liquid in the beer you’ve paid good money to drink. The froth represents Reactive Power, the power that energises your equipment. It doesn't do any useful work – it doesn’t quench your thirst.
As you pay for the whole glass of beer, you want more of the liquid and less of the froth to get value for money. Poor power factor is like a beer with too much froth, with the froth representing wasted energy (money). By improving your power factor, most or all of the power supplied that you are paying for is being used for productive work. By not paying for the froth, you save money.
Case Study showing cost-saving


SAVING MONEY BY IMPROVING POWER FACTOR
The Electricity Utilities and Retailers are changing the way they bill you.
Traditionally, our electricity has been charged according to a kW (kilowatt) demand tariff which is commonly known as ‘real power’. This means that you are charged for the electricity that you actually use. The change is that you will now be charged according to a kVA (kilovolt-ampere) demand tariff which is commonly known as ‘apparent power’ (or real power plus re-active power).  Every electrical facility consumes an amount of re-active power. This energy is considered ‘wasted’ as it does not perform useful work. The changes are currently being rolled out across Australia.
Improving your power factor can result in considerable savings on your power bills.By installing Power Factor Correction equipment, you will be able to reduce your Peak kVA Demand Tariff and this will result in significant savings in your electricity bill
Reducing your electricity costs with power factor correction 



HOW CAN junke HELP YOU?
 Power Factor Correction. Contact us for a free site appraisal and no obligation assessment to see if you can save money on your energy costs.

We welcome you to contact us and tell us about your site. We will happily assess your bill and
determine whether you need Power Factor Correction.

If you do, we will offer a tailored solution and show you how much you will save. We will also clearly explain your Return On Investment (ROI) so you can make an informed decision.
There’s no charge - no obligation.
 

CONTACT JUNKEAND SAVE MONEY
 

THE JUNKE SVG

Simple power factor correction solutions incorporate banks of capacitors that work as silent reactive power ‘generators’. These systems were designed many decades ago when electrical environments were a lot simpler than they are today. They are common, very economical and suitable for linear load environments.
However, in today’s modern electrical environments, linear loads are not easy to find. Due to the proliferation of LED/energy efficient lighting, switch-mode power supplies, VSD’s, UPS’s, servers/computers and typical appliances, today’s electrical systems experience complex, dynamic non-linear loads. Loads are being switched so fast that the traditional capacitor bank PFC systems struggle to maintain an effective compensation set-point. Therefore, they are perpetually ‘chasing’ the load, either under or over-compensating but rarely providing effective compensation.
Fuseco offers the latest generation of advanced performance PFC solutions that offer instantaneous, dynamic step-less compensation, ideal for the challenging demands of modern electrical environments. The Sinexcel SVG solutions do not need a capacitor bank and offer many advantages due to their compact & modular configuration (including wall-mount options).
 

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%.

Virtually no on-going maintenance costs

No maintenance costs required, no on-going servicing or spare parts required.

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 AC capacitors, resulting in greater longevity and minimal maintenance costs.

ROI (Return on Investment)

It makes great financial sense to invest in SVG technology. Typically, our customers achieve a ROI of 18 months – 3 years. After this period, they benefit from on-going cheaper electricity costs permanently.

The SVG does not require a maintenance contract

Because there are no capacitors to maintain, the on-going costs are negligible.

Reduced burden on infrastructure

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

Features

Exceptional power factor correction performance

Can maintain a Power Factor of 0.99 lagging or unity if required.
 

Dynamic step-less compensation

The Sinexcel SVG profiles the load and operates with a response speed of <15ms (Dynamic reaction time is less than 50us). It is a virtual 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.

Wall mounted modules can be parallel connected

Wall mounted Sinexcel SVG modules can be parallel connected to increase capacity in a 'Master / Master / Master' arrangement. In the event that one unit shuts down, the other units remain operational.
 
Corrects lagging (inductive loads) AND leading (capacitive loads) 
Power factor range (-1 to +1)
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.
 Not affected by resonance & harmonics
Can operate at low voltages

THE SVG IN ACTION


This screen shot is from a Sinexcel SVG unit operating at one of our customer locations.
The Load Current information in the bottom left of the screen displays the actual load, RMS (Amps) of the site, the PF (Power Factor) and the THDI (Total Harmonic Distortion Current).

There are 2 important factors to note here. Firstly, this site has a significant phase current imbalance. The RMS between the 3 phases ranges from 858.9A to 816A. That is a 42.9A phase current imbalance. Secondly, the PF ranges from 0.842-0.858 across the three phases which is considered poor and correction is required.
The Grid Current information at the top left of the screen displays the corrected RMS and PF after compensation by the Sinexcel SVG. Note that the phase current imbalance has been corrected and the RMS has been reduced to 442A (approx. 17% reduction). The PF has been corrected to 0.995. This sort of performance cannot be achieved with traditional PFC systems.
By correcting the power factor and the phase imbalance, the Sinexcel SVG presented an almost perfect load to the grid, resulting in a maximum return available when a kVA peak demand tariff is used, which significantly reduced their energy costs.

Performance

 

SVG (Static VAR Generator)

Switched Capacitor Bank System


Mode of Operation
 
The SVG detects the load current on a real-time basis through an external CT and determines the reactive content of the load current. The data is analysed and the SVG’s controller drives the internal IGBT’s by using PWM signals to make the inverter produce the exact reversing  reactive current of the corresponding load reactive current. The system detects the load current on a real-time basis through an external CT and determines the reactive content of the load current. The data is analysed and the system’s controller switches in the required amount of reactive current in steps, depending on the amount of reactive current available to it in that moment from the capacitor bank.

Compensation method
 

The SVG performs as a controlled current source, thus obtaining a power factor of 0.99 lagging whilst avoiding over-compensation and under-compensation.

Traditional PFC systems use capacitors in groups. Their output current is in fixed steps (50kVAr, 25kVAr, 12.5kVAr, 6.25kVAr) which usually leads to over or under-compensation.

On-going costs
 

The SVG does not require a maintenance contract. It simply requires that the unit is kept clean. Aside from the initial purchase cost, on-going costs are negligible.
 

Capacitor bank style PFC systems are typically sold with a maintenance contract which is an on-going monthly charge to pay for regular maintenance and the cost of replacement parts like the capacitors, contactors, fuses, etc.
 

Response Time
 

The complete response time of the SVG is less than 15ms and the dynamic response time is less than 50μs. The SVG can track the dynamics of the load and compensate instantaneously in almost real-time.

Capacitor bank style PFC systems take at least 20ms – 40s to perform compensation depending upon whether the switching is done via a solid state switch or a contactor.

3 Phase Operation
 

The SVG measures and provides dynamic kVAr compensation throughout all three phases.
 

A switched capacitor bank style PFC system measures only one phase and provides stepped kVAr compensation only to that phase, irrespective of what the other two phases need.

Load Imbalances
 

The SVG can, if required, balance the phase currents to further lower the peak kVA presented to the grid (or energy authority).

Capacitor banks with Delta connected capacitors cannot balance the load currents in a three phase system.

Wall-Mount Solutions
 


The SVG is available in the following wall-mount options: 50kVAr, 100kVAr & 200kVAr.

They can be parallel connected in a ‘Master / Master / Master’ type arrangement. This ‘plug and play’ system provides the safest continuous operation. If one unit is shut down for whatever reason the remaining modules remain in operation until the alarm is attended to or the situation resolved.


Limited range.
 

Resonance
 

The capacitance of the SVG does not require the installation of a de-tuning reactor. Performing as a current source and an active compensation device the SVG has been designed to not be affected by resonance.

Traditional PFC systems are affected by resonance, which is detrimental to the capacitors. To lower the risk, de-tuning reactors are introduced into the circuit to lower the resonant frequency below that of the lowest harmonic in the circuit.

Harmonics
 

The SVG can operate in harmonically rich environments of up to 15% THDV without detriment to itself or its performance.

Even with the use of de-tuned reactors, harmonics play a major role in shortening the lifespan of capacitors and contributing to their destruction.

Load Type
 

The SVG can correct both a lagging and a leading power factor, as well as work with a traditional capacitor type PFC system to eliminate over and under compensation.

Capacitor bank style PFC systems can only compensate for inductive loads.
 

Operation at low voltages
 

Designed with an active compensation circuit. Therefore the voltage of the grid has little influence on the compensation capacity. The output of reactive current matches the working conditions even when the voltage of the power grid is low.

Capacitor output is subject to the voltage of the grid, so if the grid voltage is low the output of the capacitors will be low, resulting in a decline in available compensating capacity, under-compensation and possible fault conditions.

Sizing
 

The compensation capacity of the SVG is the same as the installed capacity. Therefore for a given compensation effect, the capacity of the SVG may be 20%-30% less than that of a standard capacitor type PFC system.

To better suit the changing dynamics of the load, a traditional capacitor type PFC system needs to be oversized and to have a greater number of smaller steps to better suit the application. This increases the cost.

 

ROI

(Return on Investment)
 

The SVG does not require a maintenance contract. It simply requires that the unit is kept clean. Aside from the initial purchase cost, on-going costs are negligible.
 

When estimating the ROI for capacitor bank style PFC systems, apart from the initial cost of the system, other factors over the medium to long term must be considered, including the on-going cost of the maintenance contract and replacement parts like the capacitors, contactors, fuses, etc.

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