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Water-cooled Reactor
Water-cooled Reactor
Water-cooled reactor is an electrical
equipment used for reactive power compensation and current limiting in power
systems. It effectively reduces equipment operating temperature, improves
stability and lifespan through water cooling. Its core functions include suppressing
harmonics, balancing reactive power, and limiting short-circuit current, and it
is widely used in high current scenarios such as high-voltage direct current
transmission (HVDC), frequency converters, and arc furnaces.
Technical Characteristics
Cooling method: Adopting a closed water
circulation system, the cooling efficiency is increased by 30% -50% compared to
air cooling, and the temperature rise can be controlled below 45K.
Structural design: usually iron core type,
winding made of copper foil or flat copper wire, insulation level of H (180 ℃),
and shell made of stainless steel to prevent water corrosion.
Performance parameters: The rated current
can reach several thousand amperes (such as 5000A), the reactance value range
is 1% -100%, and the ability to withstand short-circuit current is up to
50kA/1s.
Application scenarios
In the industrial field, high-power
frequency conversion equipment such as rolling mills and electrolytic aluminum
need to be matched with PLC systems to achieve dynamic compensation.
New energy: In SVG devices for
photovoltaic/wind farms, suppress grid connected harmonics (THD<3%).
Rail transit: The 24 pulse rectification
system of the traction substation, with a voltage level of 35kV.
Selection precautions
Water quality requirements: The water
resistance of the cooling water should be greater than 5M Ω· cm, with a pH
value of 6-8, to prevent scaling or electrolytic corrosion.
Installation specifications: The
inclination angle should be ≤ 5 °, and shock-absorbing joints (vibration
displacement<0.1mm) should be installed on the inlet and outlet pipes.
Maintenance cycle: Check the sealing of the
waterway every 6 months, and clean the filter if the flow deviation exceeds ±
10%.
Industry standard
Meets the requirements of IEC 60076-6
(reactors) and GB/T 1094.6 (cooling systems), with a protection level of IP54
or above. There are parallel reactors available in the store now, which have
ISO9001 certification, dry-type insulation structure, and 10kV system voltage
adaptation capability, suitable for current limiting needs in terminal
distribution scenarios. Welcome to contact us to provide you with the best
solution.
Detailed Introduction to Water-Cooled
Reactor for Power Equipment
Overview
A water-cooled reactor is a type of reactor
widely used in the field of power equipment, especially in high-voltage and
extra-high-voltage applications. In electrical systems, a water-cooled reactor
is designed to limit short-circuit current, filter harmonics, or control
reactive power. Unlike air-cooled designs, a water-cooled reactor employs
circulating water as the cooling medium, which provides highly efficient heat
dissipation and allows the reactor to operate continuously under heavy
electrical loads.
Structure and Design
The structure of a water-cooled reactor
generally includes the winding, core (or air-core in some designs), cooling
pipes, and water circulation system. The winding of a water-cooled reactor is
made from copper or aluminum conductor, around which water channels are
embedded or pipes are mounted. During operation, the winding of the
water-cooled reactor generates heat due to current flow, and the water directly
absorbs this heat, keeping the reactor at a safe temperature. This compact
design makes the water-cooled reactor ideal for installation in power
substations, converter stations, and industrial power supply systems.
Working Principle
The water-cooled reactor works on the
principle of inductive reactance. By introducing inductance into the power
circuit, the water-cooled reactor effectively limits fault currents, suppresses
harmonics, and improves system stability. As current flows through the coil of
the water-cooled reactor, magnetic flux is generated, creating inductive
impedance. This impedance restricts rapid current surges and ensures stable
operation of electrical networks. At the same time, the cooling water system of
the water-cooled reactor maintains constant thermal balance, preventing
overheating even during peak load conditions.
Applications in Power Systems
The water-cooled reactor is extensively
applied in various areas of electrical engineering:
Current Limiting: The water-cooled reactor
restricts short-circuit currents, protecting transformers, capacitors, and
circuit breakers.
Harmonic Filtering: In capacitor banks or
static var systems, the water-cooled reactor is combined with capacitors to
form harmonic filter circuits.
Reactive Power Compensation: The
water-cooled reactor regulates reactive power and stabilizes system voltage.
Industrial Power Supply: Large industries
such as metallurgy, smelting, and chemical processing use the water-cooled
reactor to ensure reliable and efficient operation of power equipment.
Advantages of Water-Cooled Reactor
Compared to dry-type or air-cooled designs,
the water-cooled reactor has unique advantages:
High cooling efficiency allows the
water-cooled reactor to handle large currents in a smaller volume.
Compact structure makes the water-cooled
reactor suitable for limited installation spaces.
Continuous operation is possible under
high-load conditions.
Long service life is achieved due to
controlled operating temperatures.
Conclusion
In the field of electrical power equipment, the water-cooled reactor plays a vital role in ensuring system safety, efficiency, and stability. By combining advanced inductive technology with effective water cooling, the water-cooled reactor offers superior performance in current limiting, harmonic filtering, and reactive power compensation. With the growing demand for high-capacity and reliable power systems, the water-cooled reactor will continue to be an essential solution in substations, industrial facilities, and modern smart grids.
Dry-Type Iron-Core Reactor (Low Voltage)
