Đúng, Nhưng với những hạn chế:
Giảm thiểu hài hòa cải thiện hệ số công suất biến dạng (Nhúng):
Bằng cách loại bỏ các dòng sóng hài, AHFs làm giảm tổn thất yếu tố công suất biến dạng, Cải thiện toàn bộ hệ số công suất (TPF).
Limited Reactive Power Compensation:
Some advanced AHFs can inject leading or lagging currents to correct displacement power factor (similar to capacitors or STATCOMs).
Tuy nhiên, 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: Variable Frequency Drives (VFD) generate harmonics and inductive reactive power.
Giải pháp: 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.
Giải pháp: 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.
Giải pháp: 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.
- Phần kết luận
Active Harmonic Filters do improve power factor, but primarily by reducing harmonic distortion (Nhúng) 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. Tuy nhiên, engineers must evaluate whether harmonics or reactive power is the dominant issue before selecting the right solution.
