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12
2026
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10
Power Grid Challenges in the Renewable Energy Era: How Do Dry-Type Air-Core Reactors Support Grid Stability?
As solar power, wind power, and energy storage continue to expand, dry-type air-core reactors offer valuable solutions for power quality management, reactive power control, and power system operation.
The global energy transition is driving continuous transformation in power systems. The rapid development of solar photovoltaic generation, wind power, and battery energy storage systems (BESS) is changing the structure of electricity generation and the way electrical energy is converted. Meanwhile, fluctuations in renewable energy output, harmonics generated by power electronic equipment, and reactive power management requirements are creating new challenges for grid design and operation.
With their good inductance linearity and flexible engineering configurations, dry-type air-core reactors can be incorporated into renewable energy facilities according to specific system design requirements.
Solar and Wind Power: Improving Grid-Connected Power Quality
In photovoltaic systems, inverters convert direct current (DC) into alternating current (AC). Depending on the inverter topology and filter design, reactors can work with capacitors and other components to mitigate specific harmonics and improve current quality.
In wind power projects, reactors may be used in filtering or current-control circuits, depending on the design requirements of converters and grid-connection equipment. In addition, long transmission lines and cable systems can generate capacitive reactive power. Properly selected shunt reactors can absorb part of this reactive power and help regulate system voltage.
Energy Storage Systems: Supporting Power Electronic Equipment
Battery energy storage systems use a Power Conversion System (PCS) to enable bidirectional energy conversion during charging and discharging. Current quality, electrical interactions between equipment, and grid-connection performance must all be considered in system design.
Depending on the converter topology and filtering scheme, reactors can form part of the relevant electrical circuits and work in coordination with other filter components and control strategies. Selection should take into account inductance requirements, losses, installation space, and the overall system configuration.
Equipment Advantages and System Integration
Because dry-type air-core reactors do not use a ferromagnetic core, they are not subject to iron-core magnetic saturation. Their oil-free construction also helps reduce maintenance requirements associated with insulating oil. However, a reactor alone cannot guarantee grid stability. Its actual contribution depends on equipment parameters, system topology, control strategies, and the overall engineering design.
In renewable energy substations, industrial power facilities, and energy storage installations, engineers must also consider rated current, short-time withstand capability, insulation performance, temperature rise, and the effects of surrounding magnetic fields to ensure compatibility with site conditions.
Supporting Renewable Energy Infrastructure
As renewable energy integration continues to expand, power systems will face increasing demands for power quality, fault-current limitation, and operational reliability. Reactors will continue to serve important functions in filtering, current limitation, and reactive power management where required by the specific system design.
DKNC continues to monitor developments in renewable energy integration and power equipment technology. By providing professional product solutions and technical support for power transmission and distribution projects, renewable energy developments, and energy storage facilities, DKNC aims to support the safe, reliable, and efficient operation of modern power systems.
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