Description
Product Overview
The ABB XVC767AE105 3BHB007209R0105 is a highly advanced, fully digital Excitation Controller or Automatic Voltage Regulator (AVR), belonging to ABB’s UNITROL® 6000 series of static excitation systems. This specific model, identifiable by the order code
3BHB007209R0105, represents a powerful, modular, and configurable control unit engineered for the precise regulation, control, and protection of large synchronous generators and synchronous motors. Its primary function is to maintain the generator’s terminal voltage at a setpoint, control reactive power (VArs), and enhance power system stability by dynamically adjusting the direct current supplied to the generator’s rotor field winding via a thyristor converter. The controller achieves this by continuously acquiring and processing key electrical parameters (voltage, current, power, frequency) and executing sophisticated digital control algorithms, including automatic voltage regulation (AVR), field current regulation (FCR), and featuring an integrated Power System Stabilizer (PSS) to dampen electromechanical oscillations.The value of the ABB XVC767AE105 lies in its superior dynamic performance, high reliability, and advanced system integration capabilities. Engineered for demanding utility and large industrial applications, it provides a fast and stable response to load changes and grid disturbances, ensuring optimal generator performance and compliance with stringent grid codes. The controller incorporates comprehensive protection functions for both the generator and the excitation system. With native support for modern communication standards like IEC 61850, it seamlessly integrates into digital substations and plant-wide monitoring and control systems. For operators of thermal, hydro, and nuclear power plants, as well as large industrial drives, the ABB XVC767AE105 is a critical asset that guarantees stable and efficient power generation while providing the intelligence and connectivity needed for modern asset management, predictive maintenance, and participation in advanced grid support services.
Technical Specifications
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Parameter Name
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Parameter Value
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Product Model
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ABB XVC767AE105 3BHB007209R0105
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Manufacturer
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ABB
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Product Series
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UNITROL® 6000 Series
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Product Type
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Digital Excitation Controller / Automatic Voltage Regulator (AVR)
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Control Functions
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Automatic Voltage Regulation (AVR), Field Current Regulation (FCR), Reactive Power (VAr) / Power Factor (PF) Control, Under-Excitation Limiter (UEL), Over-Excitation Limiter (OEL), V/Hz Limiter.
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Power System Stabilizer (PSS)
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Integrated, advanced PSS (typically dual-input or multi-band) for effective damping of local and inter-area power oscillations, enhancing grid stability.
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Protection Functions
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Loss of Excitation (40G), Field Overcurrent, Stator Current Overload, Volts/Hertz (V/Hz) Protection, Over/Under Voltage.
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Measurement Inputs
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Generator terminal voltage (via VTs), stator current (via CTs), field voltage and current, frequency, synchronizing signals.
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Control Outputs
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Firing pulses to thyristor bridges (via fiber optic links for isolation and noise immunity), analog outputs, relay outputs for alarms, tripping, and control.
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Communication Interfaces
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Multiple ports: Ethernet (supporting IEC 61850-8-1 MMS, Modbus TCP/IP), Serial (RS-485/232 for Modbus RTU, IEC 60870-5-103), USB for local service and configuration.
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Human-Machine Interface
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High-resolution graphical display with keypad or touch screen for local configuration, real-time monitoring, trending, and manual control.
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Redundancy
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Designed for high availability, supporting configuration in redundant (hot or cold standby) architectures.
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Power Supply
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Redundant, wide-range DC or AC power supply inputs (e.g., 24-48 V DC / 110-230 V AC).
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Operating Temperature
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0°C to +60°C (for controller cabinet environment).
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Certifications
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Complies with IEEE 421.5, IEC 60255, IEC 61850, UL, CE, and other major international standards and grid codes.
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Key Features and Advantages
ABB XVC767AE105 3BHB007209R0105 is distinguished by its advanced, adaptive control algorithms and superior grid support features. A key advantage is its high-performance control loops that ensure precise and stable voltage regulation (typically within ±0.5%) with a very fast dynamic response to system transients. The integrated, sophisticated Power System Stabilizer (PSS) is critical for utility-scale generators, actively suppressing power swings to improve the stability limits of the interconnected grid, making it an essential tool for enhancing overall power system reliability.
Comprehensive protection suite and diagnostic intelligence are engineered into its core. The controller includes a full set of generator and excitation system protective functions, safeguarding the valuable asset. It features extensive, continuous self-diagnostics that monitor hardware health, communication links, and signal validity. Detailed event logging and high-resolution disturbance recording (capturing pre- and post-fault waveforms) provide invaluable data for rapid fault analysis and root cause determination, enabling proactive, condition-based maintenance strategies and reducing meantime to repair.
Future-proof connectivity and operational excellence are fundamental benefits. Native support for IEC 61850 enables seamless integration into modern digital substations, facilitating efficient engineering, interoperability, and a significant reduction in hardwiring. The intuitive local HMI simplifies daily operations, troubleshooting, and parameter viewing. The controller can be easily integrated with higher-level plant control systems (DCS) and asset performance management platforms (like ABB Ability™). For generator owners, the XVC767AE105 delivers not only superior technical performance but also the operational insights and connectivity required for modern, data-driven power generation, ensuring compliance, maximizing availability, and optimizing the total cost of ownership over the asset’s lifecycle.
Application Areas
The ABB XVC767AE105 excitation controller is designed for high-performance applications involving large, critical synchronous machines.
Its primary domain is utility-scale power generation:
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Thermal Power Plants (Coal, Gas, Oil-fired): For main generator excitation.
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Hydroelectric Power Plants: For both large and small hydro generators.
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Nuclear Power Plants: Where the highest levels of reliability and performance are required.
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Combined-Cycle Gas Turbine (CCGT) Plants.
It is also extensively used in large industrial co-generation plants in sectors like pulp & paper, chemicals, and metals. For synchronous condensers, it provides precise and fast reactive power control for grid voltage support. Additionally, it is applied in large synchronous motor drives for critical compressors, pumps, and mills. Essentially, the XVC767AE105 is the controller of choice for any synchronous machine application demanding the highest levels of control performance, reliability, and grid integration capabilities, typically for generators and large motors in the range of 50 MVA to well over 1000 MVA.
Related Products
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ABB Thyristor Power Unit (e.g., UNITROL® PU): The power conversion stage (thyristor bridge) that supplies the field current, controlled by the firing pulses from the XVC767AE105.
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Excitation Transformer: Steps down the generator terminal voltage (or uses another AC source) to provide the appropriate AC input to the thyristor unit.
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Field Circuit Breaker and Discharge Resistor: For field circuit protection, switching, and safe de-energization.
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ABB Generator Protection Relay (e.g., REG670): A dedicated, comprehensive generator protection relay that works in conjunction with the AVR for complete asset protection.
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ABB ToolKit SPAC Software: The PC-based engineering tool for configuration, commissioning, simulation, and monitoring of the UNITROL controller and the entire excitation system.
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Voltage and Current Transformers (VTs/CTs): Provide the scaled measurement signals to the controller.
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ABB Ability™ Digital Solutions (e.g., for Generator Insights): For advanced analytics, performance optimization, and condition monitoring of the excitation system and generator.
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