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Active Power Quality

GRIDVAR Series — SVG and AHF systems across three technology tiers. Instantaneous reactive power compensation and harmonic filtering for the most demanding industrial environments.

Division 02 — Active Power Quality

GRIDVAR
Active Compensation Series

The GRIDVAR Series is Forte's active power quality product family — covering both SVG (Static Var Generator) and AHF (Active Harmonic Filter) functions across three distinct technology tiers. Each tier addresses different performance, size, and cost requirements.

Unlike passive systems, GRIDVAR modules respond in milliseconds to dynamic load changes, providing continuous reactive power compensation and harmonic filtering without the risk of over-compensation or resonance. A single GRIDVAR module can perform both SVG and AHF functions simultaneously.

SVG + AHF in one unit Instantaneous response cosφ = 1.00 achievable THD < 3% (to <2% with SiC) 400V – 690V Up to 1200 kVAr / cabinet 3 technology tiers
Compare Models ↓
GRIDVAR Series
GRIDVAR Series

Three Technology Tiers. One Ecosystem.

Choose the tier that matches your performance requirements and budget. All three models are available as SVG or AHF configuration and can be integrated into complete Forte-fabricated panels.

Standard Series

GRIDVAR-G

Standard Series

Cost-effective active compensation for standard industrial applications. Proven IGBT technology with wide capacity range.

Standard
TechnologyAdvanced IGBT, 3-Level
FunctionSVG & AHF
Voltage400V (±20%) / 690V opt.
Module capacity20 – 150 kVAr
Response time≤ 5 ms
Harmonic filtering2nd – 25th harmonic
Efficiency> 97.5%
Power factorAdjustable −1 to 1
Max. parallel20 modules
Compact Series

GRIDVAR-C

Compact Series

High-density IGBT platform. Only 88 mm height — 40% cabinet space saving. Up to 1200 kVAr in a single cabinet. Full 2nd–51st harmonic filtering.

Most Popular
TechnologyHigh-Density IGBT, 3-Level
FunctionSVG & AHF
Voltage400V (−15% ~ +15%)
Module capacity35 – 100 kVAr
Max. cabinet capacity1200 kVAr / cabinet
Response time≤ 5 ms
Harmonic filtering2nd – 51st harmonic
Efficiency≥ 97.5%
Module height88 mm (35 & 50 kVAr)
Max. parallel20 modules
Premium SiC Series

GRIDVAR-X

Premium SiC Series

Silicon Carbide (SiC) switching device. Over 100 kHz switching frequency. 4 µs instantaneous response. Up to 98% efficiency. For steel mills, arc furnaces and the most critical harmonic environments.

Premium SiC
TechnologySilicon Carbide (SiC)
FunctionSVG & AHF
Voltage220V – 380V (+10% / −15%)
Module capacity30 – 150 kVAr
Response time4 µs (instantaneous)
Switching frequency> 100 kHz
Harmonic filtering2nd – 51st harmonic
EfficiencyUp to 98%
Operating temp.−25°C ~ +55°C
CommunicationBluetooth / Mobile APP, RS485 / CAN / RJ45
Max. parallel10 modules (smart rotation)
Technical Comparison

GRIDVAR Model Comparison

A side-by-side comparison of all three GRIDVAR tiers to help you select the right model for your application.

Parameter GRIDVAR-G
Standard Series		 GRIDVAR-C
Compact Series		 GRIDVAR-X
Premium SiC Series
Switching technologyAdvanced IGBT, 3-LevelHigh-Density IGBT, 3-LevelSiC MOSFET, 3-Level
SVG function✓✓✓
AHF function✓✓✓
Simultaneous SVG + AHF✓✓✓
3-Phase load balancing✓✓✓ + Neutral
Response time≤ 5 ms≤ 5 ms4 µs / ¼ cycle (fundamental)
Switching frequency20 kHz20 kHz> 100 kHz
System efficiency> 97.5%≥ 97.5%Up to 98%
Harmonic filtering range2nd – 25th2nd – 51st2nd – 51st (ind. selection)
Operating voltage400V (±20%) / 690V opt.400V (−15% ~ +15%)220V – 380V (400V class)
Module capacity (400V)20 – 150 kVAr35 – 100 kVAr30 – 150 kVAr
Max. parallel modules20 modules20 modules10 modules (smart rotation)
Max. cabinet capacity~500 kVAr1200 kVAr / cabinetOn request
Module heightStandard88 mm (35 & 50 kVAr)Compact / High density
Special featuresRS485, CAN Bus, Modbus RTU, Mobile APP, Opt. HMIRS485 / CAN, Opt. HMIBluetooth / Mobile APP, RS485 / CAN / RJ45
Best forPlastics, textiles, general industryRetrofit, MCC, tight cabinet spacesSteel, arc furnaces, critical harmonic environments
Complete Panel Solutions

Forte-Fabricated Active Panels

GRIDVAR modules are integrated into complete switchboard panels by Forte's engineering team — custom-built to your required capacity, tested, documented and ready for site installation. Multiple cabinets can be connected in parallel for installations exceeding single-cabinet capacity.

SVG Panel

Complete static var generator panel for reactive power compensation. Capacity tailored to project requirements.

  • GRIDVAR module (G, C or X)
  • Main circuit breaker & fuses
  • Control & monitoring unit
  • Ventilation & thermal management
  • Up to 1200 kVAr / cabinet (GRIDVAR-C)
  • Factory tested (FAT)

AHF Panel

Active harmonic filtering panel. GRIDVAR-X provides full AHF functionality with significant THD reduction; performance subject to system conditions.

  • GRIDVAR module (G, C or X)
  • CT & measurement wiring
  • Control & monitoring unit
  • Ventilation & thermal management
  • Up to 1200 kVAr / cabinet (GRIDVAR-C)
  • Factory tested (FAT)

Hybrid SVG + Passive Panel

Combined active SVG and passive GRIDFIX compensation for optimal cost-performance.

  • GRIDVAR SVG module
  • GRIDFIX passive stages
  • Shared busbar & control
  • Optimised for arc furnace & rolling mill
  • Factory tested (FAT)

Hybrid AHF + Passive Panel

Combined active AHF and passive detuned filter stages for full power quality correction.

  • GRIDVAR AHF module
  • GRIDFIX passive stages
  • Shared busbar & control
  • Covers both reactive & harmonic needs
  • Factory tested (FAT)
Key Features

Why GRIDVAR Outperforms Passive Systems

For facilities with dynamic loads, variable harmonic content, or strict power quality requirements, active compensation delivers results that passive systems simply cannot match.

Instantaneous Response

GRIDVAR responds in milliseconds — not cycles. The GRIDVAR-X SiC series reacts in just 4 µs instantaneously, eradicating transients from arc furnaces and large presses before they propagate into the grid.

SVG + AHF in One Unit

A single GRIDVAR module simultaneously performs reactive power compensation (SVG) and harmonic filtering (AHF). One cabinet, one installation, one interface.

No Risk of Over-Compensation

Unlike passive capacitor banks, GRIDVAR continuously measures and adjusts output — eliminating the risk of over-compensation that damages equipment and increases penalties.

Compact Footprint

Especially with GRIDVAR-C (Compact Series), active compensation fits into spaces where traditional passive panels cannot. Ideal for retrofits and space-constrained installations.

2nd – 51st Harmonic Cancellation

GRIDVAR-C and GRIDVAR-X filter the full 2nd–51st harmonic spectrum. Each harmonic order can be independently enabled or disabled. GRIDVAR-G covers the 2nd–25th range — sufficient for most industrial applications.

Immediate ROI

By eliminating reactive power penalties and reducing harmonic-related failures — GRIDVAR typically pays back within 12–24 months depending on facility size and tariff structure.

Applications

Where GRIDVAR Delivers Maximum Value

Active compensation excels wherever loads are dynamic, harmonic content is high, or power factor targets are strict.

⚡

Iron & Steel

Arc furnaces, rolling mills, crane drives. Highest dynamic load variation requiring instantaneous compensation.

🏗

Crane & Hoist Systems

Rapid load swings from crane acceleration and deceleration. Passive systems cannot track fast enough.

⛏

Mining

Large VFD-driven conveyors, crushers, and grinding mills with severe harmonic generation.

💻

Data Centres

UPS systems, server loads. Strict harmonic and power factor requirements for grid compliance.

🏥

Hospitals

MRI, CT, and surgical equipment. Sensitive loads requiring clean, stable power without distortion.

🏢

Commercial Buildings

100–800 kVAr SVG panels as a drop-in upgrade from traditional capacitor banks. Any voltage, any sector.

🏭

Cement & Petrochemical

High-power motor drives generating 5th, 7th, 11th harmonic currents that damage capacitors and transformers.

🔋

Renewables & EV

Solar inverters, EV charging stations, and battery systems requiring reactive power support and harmonic control.

Ready to eliminate power quality problems?

Our engineers will assess your facility and recommend the right GRIDVAR tier and panel configuration.

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Forte Teknik A.Ş. · Istanbul, Turkey