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Drive controlDanfoss Drives Power qualityComsys · Sinexcel PhaQtorPower Quality as a Service Charging and storageSinexcel Process equipmentDanfoss · Xylem MJK Service and supportAuthorised service for Danfoss Drives, Sinexcel and Comsys
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Comsys · Sinexcel

Power quality

Active harmonic filters, SVG active reactive power compensation and solutions for voltage sags, with measurement and analysis to EN 50160.

Harmonic distortion, reactive energy, unbalance and voltage sags have a direct impact on downtime, losses and equipment service life. Over the past 7 years we have carried out a number of power quality measurements in Croatian industry and delivered dozens of active compensation systems.

Engineers measuring power quality in the field
Measurement and analysis in the fieldPhoto: Comsys

PQ wheel

Phenomena we measure and resolve

Each phenomenon has its own metric, a limit set by the standard and a solution from our product range. Select a segment of the wheel.

Harmonics Reactive energy Unbalance Voltage sags Overvoltages Flicker Supraharmonics Voltage and freq. MEASURE DESIGN RESOLVE MONITOR PhaQtor THD % Harmonic distortion

Phenomenon 1 / 8

Harmonic distortion

Overheating of transformers and cables, protection tripping, failures of capacitors and electronics.

Causes
Frequency converters, rectifiers, LED lighting, IT equipment and chargers.
We measure
THDu and THDi, individual harmonics up to the 50th order.
Standard
EN 50160: THDu ≤ 8 %.

Phenomenon 2 / 8

Reactive energy

Charges for excess reactive energy, grid connection and transformer capacity tied up, higher losses.

Causes
Motors, transformers, inductive and capacitive loads.
We measure
cos φ, power factor (PF), reactive power Q [kvar].
Standard
Grid operator requirements: cos φ ≥ 0.95.

Phenomenon 3 / 8

Phase unbalance

Motor overheating, current in the neutral conductor, reduced usable capacity.

Causes
Single-phase loads and unevenly distributed consumption.
We measure
Voltage and current unbalance, neutral conductor current.
Standard
EN 50160: voltage unbalance ≤ 2 %.

Phenomenon 4 / 8

Voltage sags and interruptions

Production stoppages, tripping of drives and control systems.

Causes
Faults and switching operations in the grid, starting of large motors.
We measure
Depth (% Un) and duration of each event.
Standard
EN 50160: sag below 90 % Un, 10 ms to 1 min.

Phenomenon 5 / 8

Overvoltages and transients

Damage to electronics, unexplained failures and control system resets.

Causes
Lightning strikes, switching of loads and capacitor banks.
We measure
Peak values and fast transients.
Standard
IEC 61000-4-4 and 61000-4-5 (equipment immunity).
Solution
SineTamer

Phenomenon 6 / 8

Flicker

Visible lighting flicker and unsteady operation of sensitive processes.

Causes
Electric arc furnaces, welding, frequent switching-on of large loads.
We measure
Short-term and long-term flicker severity indices Pst and Plt.
Standard
EN 50160: Plt ≤ 1.

Phenomenon 7 / 8

Supraharmonics

Interference with control and communication, overheating of capacitors and filters.

Causes
Converters with high switching frequencies, EV chargers, PV inverters.
We measure
Emissions in the 2–150 kHz range.
Standard
IEC 61000: 2–150 kHz range.

Phenomenon 8 / 8

Voltage and frequency

Unstable operation of drives, protection devices and generator sets; shortened equipment life.

Causes
Grid loading, island operation, generator sets and renewable sources.
We measure
Frequency [Hz] and voltage deviation from the nominal value.
Standard
EN 50160: 50 Hz ± 1 %, voltage ± 10 % Un.
Cycle: measure → design → resolve → monitor

  • 01ΔUÛTHDu

    Reliable power supply

    Less unplanned downtime: sags, overvoltages and harmonics are detected and eliminated before they stop production.

  • 02cos φTHDikVA

    More capacity

    Reactive power and harmonic compensation relieves transformers and cables and frees up capacity on the existing grid connection.

  • 03kvarhkWhΔP

    Lower costs

    Lower losses, no charges for excess reactive energy, and longer service life of motors, drives and capacitors.

SVG response
< 15 ms
ADF P200 response
< 20 µs
SVG service life
100,000 h
Standard
EN 50160

Catalogue · 11 products

Products

Data and variants as specified by the manufacturers. Select a product for technical data.

Comsys ADF active filters

Active filters for harmonics, reactive power, load balancing and flicker, from wall-mounted modules to medium-voltage STATCOM.

Full range (6)
Comsys ADF P25 ADF30 A Comsys ADF P25 Compact active filter with the performance of larger ADF systems. Comsys ADF P100 G4 ADF50–125 A Comsys ADF P100 G4 Wall-mounted active filter with the same performance as the ADF P300 in a compact form. Comsys ADF P200 ADFup to the 100th harmonic Comsys ADF P200 One of the fastest active filters in the world, covering harmonics up to the 100th order and supraharmonics. Comsys ADF P300 G4 ADF90–375 A Comsys ADF P300 G4 General-purpose active filter in a cabinet, for small and large industrial and commercial loads.

Sinexcel SVG, AHF and AVC

Static var generators, active harmonic filters and voltage sag protection.

Full range (5)
Sinexcel SVG Sinexcel30–200 kvar Sinexcel SVG Continuous inverter-based reactive power compensation, without capacitor steps. Sinexcel Ultra SVG SinexcelSiC · 99 % Sinexcel Ultra SVG Next-generation SVG with SiC MOSFET semiconductors and a peak efficiency of 99 %. Sinexcel AHF Sinexcel5–300 A Sinexcel AHF Modular active harmonic filter for wall mounting or cabinet installation. Sinexcel Ultra AHF Sinexcel2nd–50th harmonic Sinexcel Ultra AHF Active harmonic filter with SiC technology: lighter, smaller and more efficient.

Comparison

SVG or capacitor banks?

PropertyCapacitor banksSVG
CompensationFinite number of steps via capacitor switchingContinuous, using power electronics (IGBT; SiC MOSFET in the Ultra series)
ResponseSlower; frequent switching shortens service lifeLess than 15 ms to full compensation
ResonanceCan cause resonance in the systemCannot cause resonance
Load typeInductive loads onlyInductive and capacitive loads
Phase balancingNot possibleBuilt-in function
Grid voltageLower voltage: weaker compensationDoes not affect compensation
DimensionsRequires more spaceUp to several times smaller, ideal for retrofits
MaintenanceAnnual replacement of consumable componentsVirtually maintenance-free, 100,000 h
Dynamic loadsToo slow for rapid load changesTracks rapid changes (presses, cranes, welding)
Power analyserAdditional investment in measuring equipmentBuilt-in: U, I, P/Q/S, THD, cos φ, λ, waveforms

Calculator

How many kvar do you need?

Approximate SVG compensation rating needed to reach the target power factor.

QSVG = P · (tan φ1 − tan φ2)

Required compensation 169 kvar Indicative configuration 1 × 100 kvar + 1 × 50 kvar + 2 × 15 kvar

Indicative calculation for reactive energy only. We carry out exact sizing after measuring the network (harmonics, unbalance, load dynamics).

Request an exact calculation

References

References

Selected systems installed in Croatian industry.

All references
  • SVG 100 kvar: Hotel industry

    Hotel industry

    SVG 100 kvar

    Sinexcel SVG, wall-mounted module

  • SVG 100 kvar: Research institution

    Research institution

    SVG 100 kvar

    Sinexcel SVG, wall-mounted module

  • SVG 200 kvar: Aviation industry

    Aviation industry

    SVG 200 kvar

    Sinexcel SVG, wall-mounted module

  • SVG 200 kvar: Metal industry

    Metal industry

    SVG 200 kvar

    Sinexcel SVG in an existing distribution cabinet (retrofit)

Documents

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