UHV large-capacity tank-type shunt capacitors are a key supporting technology for modern ultra-high voltage power systems, with proven performance in optimizing power transmission, providing reactive power compensation, and ensuring grid stability. Backed by rigorous testing and field deployment in major national power projects, this equipment addresses the most demanding challenges of long-distance, large-capacity power transmission.
This capacitor and reactor acts as the core solution for reactive power compensation on the main transformer side in 110kV and higher UHV AC substations. It compensates for reactive power deficits caused by inductive loads, greatly improves the power factor, cuts transmission line losses by up to 30%, and maximizes the economic efficiency of power transmission and transformation equipment. A breakthrough model launched in 2018 ranks among the world’s highest-voltage and largest-capacity units of its kind. It has passed national type tests and international novelty searches, and holds two invention patents.
Custom-engineered for digital smart substations, the unit is fitted with an integrated online monitoring system that continuously collects real-time data on voltage, current, and operating temperature. Its GIS bushing outlet design enables seamless pipeline connection with fully GIS-structured substations, eliminating compatibility risks and simplifying system integration.
In earthquake-prone regions, this capacitor and reactor maintains exceptional reliability thanks to its superior seismic performance. It withstands horizontal accelerations of 0.3g (equivalent to Seismic Intensity Grade 8), ensuring uninterrupted power supply during and after earthquakes and preventing cascading grid failures.
Adopting an innovative integrated unit design and all-in-one technology, it reduces the footprint by 41.6% compared to traditional frame-type installations. Its modular design not only lowers land acquisition costs but also simplifies installation, inspection, and maintenance, greatly reducing operational workload.
The floor-standing fully insulated structure adopts multi-stage graded insulation technology and high-strength insulating supports, effectively isolating interference from the external environment. Its internal fuse protection mechanism prevents fault propagation. The equipment has successfully passed the 1.9Un power frequency extreme voltage withstand test, with insulation performance far exceeding industry standards.
In addition to outstanding seismic performance, the capacitor and reactor achieves ultra-low noise operation with a sound power level of only 67.7dB(A), meeting the strictest environmental requirements for urban and suburban substations. It operates stably at ambient temperatures ranging from -40°C to +55°C and under high-humidity conditions.
Designed with inherent intelligent capabilities, it provides full online monitoring functions and standardized communication interfaces, enabling seamless integration into digital grid management systems. This supports real-time status feedback, remote control, and predictive maintenance, substantially improving grid operational efficiency and fault response speed.
UHV large-capacity tank-type shunt capacitors have set new industry benchmarks through comprehensive optimization in structure, performance, and intelligence, serving as the cornerstone of safe, efficient, and cost-effective operation for modern UHV power systems.
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