AC and DC high voltage filter capacitors for conventional and HVDC transmission systems
High-voltage filter power capacitors are designed for demanding 50 Hz and 60 Hz AC power systems and are widely used to improve power quality, reduce harmonic distortion, and enhance overall grid performance. These capacitors provide a low-impedance path for higher harmonic currents in the network, helping stabilize electrical systems and improve power factor.
The product range includes both high-voltage AC filter capacitors and high-voltage DC filter capacitors, making them suitable for conventional power systems as well as HVDC transmission applications.
Designed for advanced power quality improvement
High-voltage filter capacitors are engineered to support stable and efficient operation in modern electrical networks. By filtering harmonic currents and compensating reactive power, they help reduce electrical losses, improve voltage quality, and protect critical power equipment.
Typical applications include:
- HVDC transmission systems
- High-voltage AC power systems
- Utility substations
- Harmonic filtering systems
- Reactive power compensation installations
- Industrial and renewable energy applications
AC and DC filter capacitor solutions
The capacitor portfolio includes several specialized solutions designed for different grid applications.
High-voltage AC filter capacitors
Used in AC power systems and HVDC converter stations to:
- Reduce harmonic distortion
- Improve power factor
- Stabilize voltage quality
- Support efficient grid operation
High-voltage DC filter capacitors
Designed for HVDC transmission systems to:
- Suppress DC-side harmonics
- Improve converter system performance
- Enhance transmission stability and reliability
Shunt capacitors for HVDC systems
Applied in HVDC transmission systems to support reactive power compensation and optimize overall network efficiency.
Compliance with international standards
The capacitors are designed and manufactured according to internationally recognized standards to ensure high reliability, electrical safety, and long-term operational performance.
Key standards and specifications
- GB/T11024.1 – Shunt capacitors for AC power systems above 1 kV: General
- GB/T11024.2 – Aging testing
- GB/T11024.4 – Internal fuse requirements
- GB/T20993 – DC filter capacitors and neutral bus surge capacitors for HVDC transmission systems
- GB/T20994 – Shunt capacitors and AC filter capacitors for HVDC transmission systems
- DL/T840 – Specification of high-voltage shunt capacitors for service
- GB/T311.2 – Insulation coordination: Definitions, principles and rules
- IEC 60871-1 – General requirements for AC shunt capacitors above 1000 V
- IEC 60871-2 – Endurance testing
- IEC 60871-3 – Protection of shunt capacitors and capacitor banks
- IEC 60871-4 – Internal fuse requirements
Engineered for reliable long-term performance
Manufactured with advanced dielectric materials, precision production technology, and strict quality control processes, high-voltage filter capacitors deliver dependable performance in demanding operating environments. Their robust construction ensures low losses, stable capacitance, excellent insulation performance, and long operational life.
By improving harmonic filtering and reactive power compensation, these capacitors help utilities and industrial operators increase system efficiency, enhance grid reliability, and support the growing demands of modern power infrastructure.
