Sim, mas com limitações:
A mitigação harmônica melhora o fator de poder de distorção (DIPF):
Eliminando correntes harmônicas, AHFs reduz as perdas de fator de potência de distorção, melhorando o fator de poder total (TPF).
Limited Reactive Power Compensation:
Some advanced AHFs can inject leading or lagging currents to correct displacement power factor (similar to capacitors or STATCOMs).
No entanto, they are less cost-effective than capacitors for pure reactive power correction.
- Comparison with Traditional PFC Methods
- Practical Applications Where AHFs Improve Power Factor、
2.1 Industrial Plants with VFDs
Problem: Unidades de frequência variáveis (Vfds) generate harmonics and inductive reactive power.
Solução: AHFs reduce harmonics, improving DiPF, while capacitors correct DPF.
2.2 Data Centers with SMPS Loads
Problem: Switch-mode power supplies (SMPS) cause harmonic distortion and poor power factor.
Solução: AHFs clean harmonics, enhancing overall power factor without additional PFC units.
2.3 Renewable Energy Systems
Problem: Solar/wind inverters introduce harmonics and fluctuating reactive power.
Solução: Hybrid systems (Ahf + STATCOM) provide both harmonic filtering and dynamic PFC.
2.4. Limitations of AHFs in Power Factor Correction
Higher Cost: AHFs are more expensive than capacitor banks for pure PFC.
Limited kVAR Capacity: They are optimized for harmonics, not bulk reactive power.
Not Always Needed: If harmonics are low, capacitors or STATCOMs may be more efficient.
- Conclusão
Active Harmonic Filters do improve power factor, but primarily by reducing harmonic distortion (DIPF) rather than compensating for reactive power (DPF). For full PFC, a combination of AHFs and capacitors/STATCOMs is often the best solution.
In modern power systems with high harmonic pollution, AHFs offer a dual benefit: cleaner power and better power factor. No entanto, engineers must evaluate whether harmonics or reactive power is the dominant issue before selecting the right solution.
