3BHL000389P0104 static excitation system controller ABB

Core functions
Control logic:
Supports complex control algorithms (such as PID adjustment, protection logic) to achieve precise adjustment of generator voltage, current and power factor.
Provides automatic/manual mode switching, supports reactive power compensation and power factor control.
Interface and communication:
I/O interface: multiple digital/analog input and output channels, connecting sensors, actuators and other devices.
Communication protocol: supports Ethernet, PROFINET, Modbus, MODBUS AF100, PROFIBUS DP/FMS, etc., to achieve remote monitoring with the host computer (such as DCS, SCADA).
Protection function:
Multiple protections such as overexcitation, underexcitation, overvoltage, undervoltage, overcurrent, etc.
Thyristor bridge temperature monitoring, single thyristor conduction monitoring and rotating diode monitoring (optional).
Technical parameters and reliability
1. Hardware configuration
Processor: 600 MHz RISC processor, equipped with 64-bit IEEE floating point unit (FPU), optimized for fast control cycle.
Power supply: DC 9~36V wide range input, supports voltage isolation and reverse connection protection, low power consumption and adapts to harsh environments.
Working environment:
Temperature: -40°C to 75°C, adapts to extreme industrial conditions.
Shock and vibration resistance: High shock and vibration resistance to ensure stable operation.
Redundant design: Some configurations support dual-channel redundancy to improve system reliability.
2. Performance characteristics
Data processing: High-speed response, real-time processing of complex algorithms, to ensure that the excitation system quickly adapts to grid changes.
Modular design: Supports integration with other UNITROL series modules (such as CIO board, CSI board) for flexible expansion.
Typical applications
Power industry:
Generator excitation control: used in thermal power plants, hydropower stations and wind power plants to ensure voltage stability (such as Guodian Tai’an 2×350MW units, Shanghai Shidongkou No. 1 Plant).
Case: The 660MW unit of Jingdezhen Power Plant adopts the UNITROL 5000 system, which realizes multi-scenario applications through PID voltage regulation and adaptive power system stabilizer.
Industrial Automation:
Process Control: In the chemical, metallurgical, papermaking and other industries, it is used for motor control, energy management and system integration.
Case: Datang Green Power Project adopts ABB MEGATROL solution, which integrates excitation and control functions, simplifies maintenance and reduces failure rate.
Difference from processor
1. Functional difference
Controller
It integrates processor, I/O interface, communication module and control logic programming function, and is a complete control unit.
It is directly responsible for excitation current regulation, protection logic execution and interaction with external systems.
Processor:
It focuses more on data calculation and algorithm execution and is a submodule inside the controller.
2. System Role
Controller: As the core component of the UNITROL system, it directly controls the excitation of the generator to ensure the stability of the power system.
Processor: It performs specific calculation tasks, such as PID regulation and protection logic operation, and needs to work with other modules.
Summary
The 3BHL000389P0104 static excitation system controller is a core component of the ABB UNITROL series. With its high-performance hardware, rich interfaces, redundant design and extensive application cases, it has become a key device in the field of power and industrial automation.
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