Modern industrial facilities rely heavily on power electronics, Unidades de frecuencia variable (VFDS), servo systems, UPS units, EV CARGERS, robotic production lines, y sistemas de energía renovable. While these technologies improve efficiency and productivity, they also introduce new power quality challenges that traditional capacitor banks can no longer solve effectively.
Como ingeniero eléctrico senior en Coeperar, I frequently receive the same question from customers:
“Should we install an Filtro armónico activo (AHF), a Generador de var estático (SVG), o ambos?”
The answer depends entirely on the power quality problems present in your electrical system. Installing the wrong solution can waste money while failing to solve the actual issue.
In this guide, I’ll explain the differences between Active Harmonic Filters and Static Var Generators, how they work, their ideal applications, and how to determine whether your facility requires one—or both.
Understanding Today’s Power Quality Problems
Power quality generally involves four major issues:
- distorsión armónica
- factor de potencia bajo
- Fluctuaciones de voltaje
- Desequilibrio trifásico
In modern factories, these problems often occur simultaneously.
Common sources include:
- Unidades de frecuencia variable (VFDS)
- Servomotores
- Sistemas UPS
- Máquinas CNC
- Equipo de soldadura
- Centros de datos
- Renewable energy inverters
- Estaciones de carga EV
- Medical imaging equipment
These nonlinear loads generate harmonic currents while consuming reactive power, resulting in higher electricity costs, sobrecalentamiento del equipo, transformer overload, and unexpected downtime.
¿Qué es un filtro armónico activo? (AHF)?
Un Filtro armónico activo (AHF) is an intelligent power electronic device designed to eliminate harmonic currents in real time.
Instead of using passive inductors and capacitors tuned to specific frequencies, an AHF continuously monitors the load current and injects equal but opposite harmonic currents into the electrical network.
The unwanted harmonics are effectively canceled before they can propagate throughout the power system.
Main Functions of an Active Harmonic Filter
- Eliminate 2nd–50th order harmonics
- Reduce Total Harmonic Distortion (Thd)
- Prevent transformer overheating
- Protect sensitive equipment
- Reduce neutral conductor current
- Improve power system reliability
- Prolongar la vida útil del equipo
Modern AHFs can achieve harmonic compensation efficiencies exceeding 95%, making them ideal for facilities with rapidly changing loads.
Typical Applications for Active Harmonic Filters
AHFs are commonly installed in:
- Plantas de fabricación
- Centros de datos
- Fábricas de semiconductores
- Hospitales
- Edificios comerciales
- Instalaciones de tratamiento de agua
- Aceite & instalaciones de gas
- Plantas de acero
- Operaciones mineras
- Estaciones de carga EV
These environments contain significant nonlinear loads that continuously generate harmonics.
¿Qué es un generador de var estático? (SVG)?
A Generador de var estático (SVG) is an advanced reactive power compensation device designed to improve power factor dynamically.
A diferencia de los bancos de condensadores convencionales, an SVG uses high-speed IGBT technology to generate leading or lagging reactive current instantly according to load demand.
Instead of waiting for contactors to switch capacitor stages, an SVG responds within milliseconds.
This enables continuous, precise power factor correction without overcompensation.
Main Functions of an SVG
An SVG provides several important benefits:
- Compensación dinámica de potencia reactiva
- Power factor correction up to 0.99
- Estabilización de voltaje
- Reduction of line losses
- Increased transformer capacity utilization
- Mejora de la eficiencia energética
- Compensation of inductive and capacitive loads
A diferencia de los bancos de condensadores, SVGs are unaffected by harmonic resonance and remain stable under rapidly fluctuating loads.
Typical Applications for Static Var Generators
SVGs perform exceptionally well in:
- Fabricación de automóviles
- acerías
- Plantas de cemento
- Fábricas textiles
- Puerto
- Aeropuerto
- Parques eólicos
- Plantas de energía solar
- Commercial complexes
- Large HVAC systems
Any installation with fluctuating inductive loads can benefit significantly from SVG technology.
Filtro de armónicos activo frente a generador de var estático
| Característica | Filtro armónico activo (AHF) | Generador de var estático (SVG) |
| Función principal | Mitigación armónica | Compensación de potencia reactiva |
| Solves Harmonics | ✔ Excellent | ✘ No |
| Improves Power Factor | Limitado | ✔ Excellent |
| Voltage Stability | Moderado | Excelente |
| Dynamic Response | <1 EM | <10 EM |
| Eliminates Resonance | ✔ Yes | ✔ Better than capacitor banks |
| Mejor para | Cargas no lineales | factor de potencia bajo |
| Main Benefit | Disminución del THD | Lower reactive power charges |
One common misconception is that an SVG can eliminate harmonics.
It cannot.
Similarly, while some AHFs can provide limited reactive power compensation, their primary purpose is harmonic suppression rather than full power factor correction.
When Should You Install an Active Harmonic Filter?
An AHF is the right choice if your facility experiences:
High Harmonic Distortion
Typical indicators include:
- THDi > 20%
- THDv exceeding IEEE 519 recommendations
- Viajes frecuentes del interruptor
- Sobrecalentamiento del transformador
- sobrecalentamiento del motor
- Mal funcionamiento del equipo sensible
Large Numbers of VFDs
Facilities with many variable speed drives often experience severe harmonic pollution.
UPS Systems
Large UPS installations produce significant harmonic currents.
Centros de datos
Servers, switch-mode power supplies, and UPS systems generate harmonics continuously.
Production Lines with Power Electronics
Modern automated manufacturing relies heavily on inverters and servo drives.
When Should You Install a Static Var Generator?
An SVG is recommended when:
Low Power Factor Increases Electricity Bills
Utilities often impose penalties when power factor falls below required levels.
An SVG can improve power factor close to unity.
Rapidly Changing Loads
Examples include:
- Grúas
- Ascensores
- Spot welding
- Compresores
- Máquinas de moldeo por inyección
Los bancos de condensadores tradicionales no pueden responder lo suficientemente rápido.
Voltage Fluctuation
SVGs provide dynamic reactive support to stabilize voltage.
Capacitor Bank Failures
Many facilities replace aging capacitor banks with SVGs because SVGs:
- require less maintenance,
- eliminate switching transients, y
- avoid capacitor degradation.
When Should You Install Both an AHF and an SVG?
In many industrial facilities, both harmonic distortion and reactive power problems exist simultaneously.
Typical examples include:
- Fabricación de automóviles
- Steel production
- Semiconductor fabrication
- Centros de datos
- Petrochemical plants
- Fábricas inteligentes
- Estaciones de carga EV
In these cases, installing both technologies delivers the best long-term results.
Benefits of a Combined AHF + SVG Solution
By integrating an Active Harmonic Filter with a Static Var Generator, facilities can achieve:
- Supresión armónica
- Dynamic power factor correction
- Reduced electricity penalties
- Improved voltage stability
- Lower transformer temperature
- Increased system efficiency
- Longer equipment life
- Greater production reliability
- Cumplimiento de IEEE 519 and other power quality standards
Many modern power quality cabinets integrate both AHF and SVG modules into one compact solution, reducing installation space while simplifying maintenance.
Por qué los bancos de condensadores tradicionales ya no son suficientes
For decades, capacitor banks were the standard solution for power factor correction.
Sin embargo, today’s electrical systems are dramatically different.
Capacitor banks have several limitations:
- Slow response speed
- Mechanical contact wear
- Harmonic resonance risk
- Fixed compensation steps
- Poor performance under fluctuating loads
As facilities adopt automation, energía renovable, and digital manufacturing, intelligent compensation devices have become the preferred solution.
SVGs and AHFs provide real-time compensation without the drawbacks associated with conventional capacitor banks.
How CoEpower Helps Improve Power Quality
En Coeperar, we understand that every electrical system is unique. Selecting the right power quality solution requires more than simply choosing a product—it requires a thorough analysis of your electrical network.
Our engineering team begins by evaluating key parameters such as:
- Distorsión armónica total (Thd)
- Factor de potencia
- Perfil de carga
- Transformer loading
- Fluctuaciones de voltaje
- Demanda de energía reactiva
- Future capacity expansion
Based on this assessment, we recommend the most cost-effective solution:
- Filtro armónico activo para mitigación armónica,
- Generador de var estático for dynamic reactive power compensation, o
- A combined AHF + SVG solution for comprehensive power quality improvement.
Our systems feature advanced DSP control, fast dynamic response, modular design for flexible capacity expansion, and reliable performance in demanding industrial environments. Whether your facility is upgrading an existing electrical system or designing a new installation, CoEpower solutions help reduce energy losses, mejorar la confiabilidad del equipo, and ensure long-term compliance with international power quality standards.
Pensamientos finales
There is no universal solution to power quality issues.
If your facility struggles primarily with harmonic distortion, an Filtro armónico activo is the appropriate investment.
If poor power factor and fluctuating reactive power are increasing operating costs, a Generador de var estático offers a more effective solution than conventional capacitor banks.
Sin embargo, many modern industrial facilities experience both problems simultaneously. In these cases, combining an AHF with an SVG delivers the highest level of power quality, improved system reliability, costos de energía reducidos, and better protection for critical electrical equipment.
As industrial power systems become increasingly complex, proactive power quality management is no longer optional—it is essential for maximizing efficiency, minimizing downtime, and supporting sustainable operations.
Preguntas frecuentes (Preguntas frecuentes)
Can an Active Harmonic Filter replace a Static Var Generator?
Not completely. While some AHFs can provide limited reactive power compensation, they are primarily designed to eliminate harmonics. For significant power factor correction, an SVG is the better solution.
Does an SVG eliminate harmonics?
No. An SVG is designed to compensate reactive power and stabilize voltage. It does not actively suppress harmonic currents.
Can I use both an AHF and an SVG in the same electrical system?
Sí. De hecho, many industrial facilities benefit from installing both devices to address harmonic distortion and reactive power compensation simultaneously.
Are AHFs and SVGs better than capacitor banks?
For modern electrical systems with nonlinear and rapidly changing loads, AHFs and SVGs offer faster response, greater accuracy, and improved reliability compared with conventional capacitor banks.
Etiquetas de palabras clave
Filtro armónico activo, AHF, Generador de var estático, SVG, Mejora de la calidad de la energía, Corrección del factor de potencia, Filtro armónico, Compensación de potencia reactiva, Mitigación armónica, Distorsión armónica total, Reducción, Compensación de potencia reactiva dinámica, Capacitor Bank Replacement, Calidad de energía industrial, Soluciones de calidad de energía eléctrica, Ieee 519 Cumplimiento, Equipos de calidad de energía, Coeperar, Smart Factory Power Quality, Eficiencia energética, Estabilización de voltaje, proveedor, fabricantes, fábrica, compañía, Porcelana, al por mayor, comprar, precio, cotización, a granel, a venta, empresas, existencias, costo.
Productos relacionados
Blogs relacionados
Obtenga una cotización hoy
