Step Voltage Regulators & TSEA TVC‑MP Control Technology

Powered by TSEA’s TVC‑MP Advanced Communication Technology

Ensuring voltage stability in medium‑voltage (MV) distribution networks is critical for energy quality, operational reliability, and customer satisfaction. As grid complexity increases due to long feeder lines, fluctuating load demand and the integration of renewable energy sources, voltage fluctuations have become more challenging.

Single‑phase Step Voltage Regulators combined with TSEA’s TVC‑MP smart control platform provide the most reliable and scalable method to maintain stable grid voltage even under dynamic loading conditions.

A Step Voltage Regulator, according to IEEE/ANSI standards, is an autotransformer‑based device capable of changing taps under load.

This architecture allows the regulator to:

• Continuously maintain voltage near the nominal value
• Respond instantly to load variations
• Correct phase‑to‑phase imbalances
• Improve power quality across the MV network

Because the regulator is single‑phase, each phase can be controlled independently—ideal for minimizing outages and improving service continuity.

The TVC‑MP smart controller, developed by TSEA, enhances Step Voltage Regulators with advanced automation, monitoring and communication capabilities. Designed to integrate seamlessly with both legacy SCADA and modern IP‑based networks, TVC‑MP elevates grid performance to smart‑grid standards.

TVC‑MP is engineered for full interoperability with today’s SCADA and automation systems.

Supported Communication Protocols

• MODBUS
• DNP 3.0
• IEC 60870‑5‑101
• IEC 60870‑5‑104

These protocols make the system adaptable to a wide range of distribution utility infrastructures.

Supported Physical Interfaces

• RS‑232
• RS‑485
• Fiber Optic
• Ethernet (Copper / Fiber)

Smart USB‑Based Data Management

• Log & event retrieval
• Parameter file transfer
• On‑site firmware upgrade

These features streamline field operations and reduce maintenance time.

Although each regulator is physically single‑phase, three units can be networked together to operate in:

• Master–Slave
• Master–Follower
• Independent phase mode

This creates highly accurate three‑phase regulation, improved phase balancing, and superior voltage control on MV feeders.

TVC‑MP includes all essential voltage‑regulation intelligence:

• Set voltage & bandwidth control
• Line Drop Compensation (UR / UX)
• Over/under voltage limiting modes
• Reverse power flow detection
• Load‑bonus functionality
• Harmonic, power quality & demand measurements

This ensures stable, reliable and automatic operation in all grid conditions.

TVC‑MP provides a modern, graphical display with:

• Real‑time operating status
• Voltage, current, power and TAP position monitoring
• Dynamic on‑screen menus
• Quick‑access command keys

This minimizes training needs and speeds up on‑site diagnostics.

• Independent phase‑by‑phase voltage control
• Eliminates voltage drop on long MV feeders
• Stabilizes renewable energy (PV/Wind) integration
• Reduces fault impact with phase‑isolated design
• Enhances power quality
• Compatible with all major SCADA systems
• Reduces losses and improves operational efficiency

TSEA’s regulators help utilities boost network performance without costly infrastructure upgrades.

TSEA Step Voltage Regulators have been successfully deployed in multiple distribution regions.

These installations eliminated both over‑voltage and under‑voltage issues and significantly improved network stability.

TSEA’s single‑phase Step Voltage Regulators, with their IEEE/ANSI‑defined autotransformer structure and on‑load tap changing mechanism, are one of the most effective solutions for medium‑voltage voltage stabilization.

Paired with the TVC‑MP smart controller—featuring multi‑protocol SCADA communication (MODBUS, DNP 3.0, IEC 60870‑5‑101/104), multi‑phase operating modes and advanced monitoring—TSEA enables distribution companies to achieve reliable, efficient and future‑ready voltage regulation.

If you’re aiming for a smarter, more stable MV distribution grid, TSEA Step Voltage Regulators offer proven performance and long‑term reliability.