UNITROL1020 3BHE030579R0003 ABB control unit

Brand: ABB

Product Series: UNITROL 1000 Series / UNITROL 1020

Model: UNITROL 1020 (Part Number: 3BHE030579R0003)

Product Type: Automatic Voltage Regulator (AVR) and Excitation Control Unit

UNITROL1020 3BHE030579R0003 ABB control unit

Technical Parameters:

Excitation Output Current: Nominal continuous output current up to 20 A DC (with maximum ceiling current capabilities up to 40 A DC for transient grid events).

Excitation Output Voltage: Supports high-efficiency pulse-width modulation (PWM) output voltage regulation up to 250 V DC.

Microprocessing Architecture: High-performance dual-core digital processor executing real-time control algorithms, PID closed-loop tracking, and limiter functions under 1 millisecond.

Control Loop Modes: Automatic Voltage Regulation (AVR), Field Current Regulation (FCR), Power Factor Regulation (PF), and Reactive Power Regulation (VAR).

Integrated Limiters: Built-in protective limiters including Over-Excitation Limiter (OEL), Under-Excitation Limiter (UEL), Stator Current Limiter, and V/Hz (Volts-per-Hertz) Overfluxing Protection.

Power System Stabilizer (PSS): Supports fully integrated Power System Stabilizer functions (such as PSS 2A/2B protocols conforming to IEEE 421.5 standards) to damp local grid oscillations.

Communication Interfaces: Multi-protocol connectivity featuring onboard Modbus TCP, Modbus RTU, CANopen, and Profibus DP networks for smooth industrial network integration.

I/O Configuration: Flexible layout consisting of multiple configurable analog inputs/outputs and fast digital inputs/outputs for local event sequencing.

Environmental Durability: Heavy-duty design with conformal-coated internal boards, operating stably within an ambient temperature range of -25°C to +70°C, and fully certified under DNV and CE marine/industrial standards.

Industrial Sectors:

Power Generation Utilities (Small to Medium Hydroelectric, Thermal, and Gas Power Plants), Marine Vessels and Offshore Platforms, Distributed Energy Resources (Cogen/Biomass Plants), and Emergency Backup Power Networks.

Application Scenarios:

1. Synchronous Generator Excitation: Serves as the primary automatic voltage regulator (AVR) panel for synchronous generators up to approximately 80 MVA, maintaining a constant terminal voltage regardless of fluctuating local electrical loads.

2. Grid Code Compliance Management: Deployed on regional power stations to leverage built-in OEL/UEL limiters and PSS algorithms, ensuring the plant complies with strict local grid integration codes and remains stable during transmission faults.

3. Marine Power Generation Control: Installed in the main generator control cubicles of container ships, cruise liners, or drilling vessels to stabilize islanded shipboard power networks against large dynamic loads caused by massive thruster steps.

4. Synchronous Motor Power Factor Correction: Utilized inside large heavy-industrial facilities (e.g., pumping stations, air separation units) to control high-power synchronous motors, regulating their excitation levels to correct the facility’s total power factor back to optimal levels.