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    • Static Var Generator

    Promising A Better Tomorrow.

    about SVG

    i -PFC (Inverter based Power Factor Correction) is the trademark name of the Static Var Generators (SVG) developed and manufactured at InstaSine. Making use of advanced controllability of 3-Phase 3-Level IGBT based voltage source inverter architecture, i -PFC SVG does precise power factor and unbalance correction without the need of any passive power factor correction capacitors.

  • No.1

    in the country as the largest modular SVG manufacter

  • 8

    Years of Extensive Expertise in SVG Making

  • 24/7

    Service Support

  • 300K+

    Amperes of SVG in operation

  • ∞

    SVG Rating options

  • 500+

    Happy Customers

    • Static Var Generator

    i -PFC SVGs are capable to perform:

    • Harmonic currents mitigation in phase currents
    • Reactive Current mitigation in phase currents (i.e. power factor correction)
    • Negative Sequence Currents Mitigation (balancing three-phase load currents)
    • Zero sequence current mitigation (Neutral current mitigation, using 3P4W AHFs)
    • Transformer HT side power factor correction while connected at LT side.

    Compensation Philosophy

    • i -PFC AHF identifies the downstream load current composition (such as, active, reactive, harmonics and unbalance components) using intelligent artificial neural network (ANN) based control technique and cancels the unwanted components at the load end through precise control of IGBTs.
    • Based on the selective harmonic compensation, i -PFC AHF computes the magnitude of individual harmonic, fundamental reactive and unbalanced current that are to be compensated.
    • As long as the compensation requirement is within the rating of i -PFC AHF capacity, it compensates all the unwanted current components. In case the requirement is higher than its rated capacity, compensation current is dynamically limited to i -PFC AHF capacity using inbuilt real-time current limiting algorithm.
    • Thanks to our closed-loop adaptive ANN control philosophy, i -PFC AHF dynamically compensates the unwanted components of load current even when the load changes frequently.
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    • i -PFC SVG Features
    Step-less Correction: Precisely controlled inverter architecture benefit i -PFC SVGs with step-less reactive power compensation, making them free from over/under compensations.
    Bidirectional Correction: i -PFC SVGs are capable to compensate both inductive and capacitive reactive loads.
    Capacitor switching and resultant Voltage Surges: Full inverter based i -PFC SVGs are free from frequent mechanical operations like capacitor switching, preventing voltage dips/spikes.
    Response time from 0-100% Output: During the load changes, i -PFC SVC can ramp up from 0 to 100% and ramp down from 100% to 0% capacity in less than 20 milli seconds, without causing any transients. Such a feature is most needed at places where frequent start-stop of processes or motors are involved. Hybrid solutions might take tens of seconds in ramping up and ramping down due to time lags in calculation and switching of corresponding capacitor banks. This hinders their performance in achieving power factors very close to unity..
    Harmonic amplification Chances: The i -PFC SVGs cause near-zero current harmonic injection while performing the power factor correction, even if the voltage THD level goes to 15%. Detuned APFC and hybrid solutions cause resonance/amplification of current harmonics which are below their resonance frequencies. And, are highly sensitive to input voltage harmonics. In case of input voltage harmonics above 2-3%, the passive part of APFC panels tend to draw corresponding current harmonics in addition to plant current harmonics. Which is unwanted in true kVAH based tariff structure.
    Voltage Dependency of kVAR Capacity: KVAR capacity of i -PFC SVG is proportional to grid voltage. Detuned APFC and passive part of hybrid solutions kVAR capacities are proportional to square of the voltage. Means, minor voltage fluctuations result in large reactive power swings .
    PF and unbalance correction with 1-Phase & 2-Phase loads: Capability to use the 100% capacity for negative sequence correction, make i -PFC SVGs to be the only contender power factor correction in the presence of large single-phase and two-phase loads.
    Maintenance Requirements: Having no frequent mechanical operations in i -PFC SVGs make them relatively maintenance free. In detuned APFC or hybrid solutions, there is always a risk of capacitor and/or contactor explosion due to the constant mechanical switching, which is a safety risk.
    Footprint: i -PFC SVG's minimal footprint saves more than 70% space, compared to the conventional APFC and/or hybrid solutions.

    i -PFC SVG Benefits

    • Step-less reactive power compensation (no over/under-compensations)
    • Bi-directional reactive power compensation
    • Compatible with LT or HT Side current sensing
    • Near unity power factor correction at all load conditions
    • Faster dynamic response time (less than 100 micro seconds)
    • Shortest power factor correction time (less than 20 milliseconds)
    • Low kVAR capacity dependency on grid voltage fluctuations .

    i -PFC SVG Specifications
    Plant Input Conditions
    System Voltage (RMS) 350 - 480 V
    System Frequency (Hz) 50 ± 5%
    Operating temperature range 0 to 450C
    Product Specification
    Semiconductor Devices IGBTs (3-Level Topology)
    Maximum Reactive Power Output @480V 125kVAR
    Step-less Compensation Range -100kVAR to +125kVAR
    Rated RMS current Output 150A
    i -PFC configuration 3P3W
    Power Factor Correction Yes
    Load Current Balancing Yes, Negative Sequence
    CT Requirement 3CTs with 1A or 5A Secondary
    CT Position Load Side / Source Side
    Integrated Short-Circuit Protection Yes
    Dimensions 800 x 890 x 330
    i -PFC Control and Paralleling
    Controller ARM based MCU
    Control Method Adaptive Artificial Neural Networks (ANN)
    Dynamic Response Time 100 microseconds
    Correction Time 10 milli seconds
    Parallel Operation Upto 50 modules per CT set
    System Integration
    CT connections between modules Daisy Chain Type
    Display 7" TFT Touch-Screen Display
    Software for PC Interface InstaView
    Cloud Connectivity Yes
    Color Standard
    Noise Level less than 65dB

    Comparison

    *Note: Custom designs are available on request.


    Billing/Savings

    kWH Billing (old tariff) without i-PFC SVG+ Installed

    Below is a snapshot of a bill from (one of our clients) for the month of March-2020:

    case study
    • Point-1 (#1) in the bill represents 1,48,863 kWH energy consumption by the plant in the month of March-2020.
    • In this particular month the reactive power consumed by the plant was: 40,224 lagging kVAH (#2) and 39,053 leading kVAH (#3).
    • Whereas the recorded kVAH consumption is 1,92,431 kVAH (#4) and total kW and kVA demand are: 614KW (#5) and 690 KVA (#6).
    • In the month of March-2020, power factor in the bill represented displacement power factor, is calculated as below:
    • Whereas the true power factor will be calculated as below:
    • Difference between the displacement and true power factors above, signify the presence of current harmonics and/or unbalance in the plant load currents.
    • Although kWH consumption (#1) is 1,48,863, the kVAH (#4) is 1,92,431 which is almost 29% higher due to lower true power factor.
    • At the same time, plant’s Maximum kVA demand (#6) of 690 is higher than the Maximum kW demand (#5) of 614. As the Fixed/Demand charges are based on Maximum Demand, at the end it got charged for 690kVA (#7).
    • In KWH billing, the consumer is usually billed based on the billed demand (#7, same as #6), average monthly PF (#8) and total KWH consumption (#9, same as #1).

    kWH Billing (new tariff) with i-PFC SVG+ Installed

    case study
    • From #1, 1,63,436 kWH energy is consumed by the plant in the month of November- 2020.
    • IIn this particular month the reactive power consumed by the plant was just: 5,125 lagging kVAH (#2) and 4,310 leading kVAH (#3). The significant reduction in both lagging and leading kVAH is due to the installation of i-PFC SVG+.
    • The kVAH is consumption is 1,63,764 (#4) which is almost equal (with negligible 0.2% difference) to the plant kWH consumption, that is, 1,63,436 (#1).
    • In KVAH billing, the consumer usually is billed based on the billed demand (#7, same as #6) and total KVAH consumption (#9, same as #4).
    • Note that the billed maximum kVA demand of 589kVA (#7) is same as maximum kW demand of 589kW (#5). This directly contribute to savings.
    • The average power factor (#9) for this month was recorded as 0.998 (almost unity).
    • As in earlier case, calculated displacement power factor is as below:
    • The power factor represented in the bill is true power factor.
    • This demonstrate the savings that can be achieved using InstaSine i-PFC SVG+ through reducing the Billed Demand kVA (#6) and maintaining almost unity power factor (#8) through the month.
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