Static Var Compensator (SVC)
Static Var Compensator (SVC), valued for its ability to provide fast and reliable voltage control has been a trusted solution for dynamic shunt compensation in both transmission and industrial markets for decades. With the first installation dating back to the 1980s and still in service today, Hitachi Energy's SVCs continue to demonstrate exceptional longevity and reliability under demanding grid conditions.
The SVC consists of several branches that include:
Thyristor-controlled reactor (TCR)
Thyristor-switched capacitor (TSC)
Harmonic filter
Controlled by Hitachi Energy’s Modular Advanced Control for HVDC (MACH™) control system, the SVC has a high degree of regulation capability. SVC provides fast, accurate reactive power control—improving voltage stability, increasing power transfer capability, boosting system strength, and mitigating flicker and power oscillations. These benefits make SVC an enduring choice for stabilizing existing infrastructure and enhancing overall power quality.
Upgrades and retrofit of SVC
A well-maintained SVC can operate reliably for more than 30 years. During this period, however, components and subsystems will age and some become obsolete. Hitachi Energy offers a range of upgrade modalities to support an aging fleet of SVCs, providing a comprehensive path to their lifecycle extension.
Reactive power and voltage support for grid stability and power quality
Compensate load disturbances to guarantee high‑quality electricity supply and improve industrial productivity
Up to 40% lower life‑cycle emissions vs. traditional technology
Maximize transmission asset utilization and related return on investment, deferring more costly infrastructure build‑up
Increase reliability of supply, voltage stability, and oscillation damping through steady‑state and dynamic voltage control
For decades, our global fleet of Static Var Compensator installations has been enabling reliable power quality for utilities and industries worldwide. At Hitachi Energy, our focus goes beyond delivering technology - we are committed to supporting these assets throughout their lifecycle. By working closely with our customers, and through structured modernization and upgrade programs, we help customers extend the lifecycle of their SVC installations, enhance system availability, and reduce operational risks, creating a sustainable path for long-term grid reliability.
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