Description
ABB 3ADT218437R0001
I. Basic Information
Model: 3ADT218437R0001
Brand: ABB
Applicable System: Core main controller of Unitrol 6080 high-end digital synchronous generator excitation control system, specially designed for large and medium-sized thermal power, hydropower and gas turbine generator units.
Product Type: High-end digital excitation main control board, integrating excitation regulation operation, parameter acquisition, PID closed-loop control, fault diagnosis, communication interaction and pulse output functions, serving as the core precision control unit of power station excitation systems.
Product Positioning
The 3ADT218437R0001 is the core main control unit of the ABB Unitrol 6080 excitation system. It undertakes full closed-loop intelligent regulation of generator excitation current, terminal voltage, reactive power and power factor. Equipped with a 64-bit floating-point high-speed CPU, it features ultra-high operation accuracy and dynamic response speed, adapting to core control scenarios such as steady-state voltage stabilization, transient forced excitation, under-excitation limitation and system oscillation suppression of large synchronous generator units. It supports single-channel, dual-channel redundant and TMR triple modular redundant architectures, with optional redundancy configuration for power supply, cooling, I/O and communication, meeting the high-reliability uninterrupted operation safety standards of large power stations. It is widely applied in excitation control systems of thermal power, hydropower, gas turbine and distributed energy power stations.
Hardware Architecture
1. Core Operation Unit: Adopts 64-bit floating-point industrial CPU with unlimited operation range and millisecond-level dynamic response, realizing high-precision calculation and logic output of unit voltage, current and reactive parameters to adapt to complex working conditions such as grid transient disturbance and load sudden change.
2. Excitation Regulation Control Unit: Built-in complete excitation algorithms, including automatic voltage regulation (AVR), field current regulation (FCR), reactive power regulation, power factor regulation, over/under excitation limitation and stator current protection, supporting bumpless automatic/manual mode switching.
3. Signal Acquisition & Conditioning Unit: Integrates multi-channel high-precision analog acquisition circuits to collect key parameters such as generator terminal voltage, stator current, rotor current, system frequency and grid voltage, providing accurate data for closed-loop regulation after filtering, isolation and A/D conversion.
4. Pulse Output & Drive Unit: Accurately outputs trigger pulses for thyristor rectifier bridges to adjust excitation output voltage and current. It adapts to a ceiling voltage of 850V and maximum continuous excitation DC current of 1600A, meeting full-load, overload and forced excitation working conditions of large units.
5. Fault Diagnosis & Protection Unit: Onboard hardware-level fault monitoring circuits self-check CPU abnormality, signal loss, pulse abnormality, communication interruption, power failure and over-temperature in real time, latching fault codes and triggering system alarms and interlock protection instantly.
6. High-speed Communication Unit: Supports two-way communication with power station DCS, SCADA and upper monitoring systems, enabling remote uploading of excitation operating parameters and fault information, and remote downloading of parameter setting, mode switching and start-stop commands.
7. Redundancy Adaptation Unit: Natively supports multi-channel redundant backup. It can be matched with redundant power supply, communication and I/O modules to realize bumpless switching of standby channels and ensure uninterrupted operation of the excitation system.
Mounting Specifications
Power Supply: Special redundant DC control power supply for Unitrol 6080 system
Mounting Method: Standard cabinet rack slot mounting, front plug-in wiring
Net Weight: 1.33kg
Protection Class: IP20, installed in sealed, dust-proof, constant-temperature and dehumidified power station excitation control cabinet
Supporting Equipment: Unitrol 6080 power module, thyristor rectifier power unit, I/O signal board, voltage/current transmitter, upper monitoring system
Commissioning Tools: ABB original excitation system debugging software, high-precision signal source, insulation tester, industrial laptop, ESD tool set
Supporting System
Supporting Hardware: Complete Unitrol 6080 excitation control unit, redundant DC power module, excitation rectifier power cabinet, signal acquisition terminal board, shielded communication cable, unit voltage and current detection transmitter.
Commissioning Tools: ABB Unitrol configuration software, waveform recorder, insulation resistance tester, high-precision multimeter.
Upper System: Power plant DCS, SIS safety monitoring system, plant-level SCADA platform, grid dispatching monitoring system.
Typical Industries: Large thermal power plants, hydropower stations, combined cycle power plants, distributed energy stations and self-owned power plant generator excitation system projects.
Product Features
1. Ultra-high Precision Floating-point Control: 64-bit floating-point CPU architecture with unlimited operation range, realizing high-precision voltage and reactive power control, suppressing grid voltage fluctuation and unit reactive oscillation to improve grid-connected stability.
2. Full-functional Integrated Excitation Algorithm: Built-in dual AVR/FCR regulation modes and multi-dimensional limitation/protection logic, covering full-process control of unit steady-state operation, transient fault, grid disturbance and start-stop without additional algorithm expansion modules.
3. High-power Working Condition Adaptability: Adapts to large unit working conditions with 850V ceiling voltage and 1600A continuous excitation current, tolerating severe working conditions such as unit forced excitation, short-term overload and large load fluctuation.
4. Multi-redundancy Architecture Support: Supports single/dual/TMR triple redundant deployment with bumpless switching, ensuring no impact on unit grid-connected operation under single-point hardware failure, meeting high-reliability operation standards of power stations.
5. Complete Fault Self-diagnosis & Protection: Dual hardware and software fault monitoring accurately locates signal sampling abnormality, pulse loss, communication interruption, power failure and over-temperature faults, triggering alarms and interlocks quickly to avoid excitation runaway, unit out-of-step and grid oscillation accidents.
6. Industrial-grade Strong Anti-interference Design: Isolated strong/weak current and shielded signal filtering design complies with power station EMC standards, ensuring long-term stable operation in complex environments with high electromagnetic interference, high voltage and large current.
7. Standardized Compatibility & Interchangeability: As the standard core main control of Unitrol 6080 system, it can directly replace old faulty modules, reuse original configuration parameters and wiring, and greatly shorten unit maintenance downtime.
II. Technical Specifications
1. Core Performance Parameters
Main Control Chip: 64-bit floating-point high-speed industrial CPU
Maximum Adaptable Ceiling Voltage: 850V
Maximum Continuous Excitation DC Current: 1600A
Control Modes: Automatic Voltage Regulation (AVR), Field Current Regulation (FCR), Reactive Power Regulation, Power Factor Regulation
Regulation Response Speed: Millisecond-level dynamic response for fast grid transient regulation
Operation Architecture: Single-channel / Dual-channel / TMR triple modular redundancy optional
2. Environmental Parameters
Operating Temperature: 0℃ ~ +60℃
Storage & Transportation Temperature: -40℃ ~ +85℃
Operating Humidity: 5%~95%RH, non-condensing, free of corrosive gas and conductive dust
Vibration Resistance: Compliant with industrial power station equipment vibration standards, adapting to long-term vibration of generator units
EMC Standard: Meet high electromagnetic interference protection standards for power station environments
III. Key Features
1. Precise Closed-loop Generator Voltage Regulation: Collects generator terminal voltage in real time, dynamically corrects excitation output against set values, stabilizes unit terminal voltage and suppresses grid voltage fluctuation to ensure high-precision steady-state grid-connected operation.
2. Excitation Current & Reactive Power Management: Accurately controls rotor excitation current, realizes precise regulation of unit reactive power and power factor, meets grid reactive power dispatching requirements, and avoids over-excitation and under-excitation operation.
3. Full-dimensional Unit Limitation & Protection: Integrates over-excitation limitation, under-excitation limitation, stator/rotor overcurrent protection and forced excitation time-limited protection to prevent unit overheating, out-of-step and oscillation tripping faults.
4. Full-working-condition Adaptive Regulation: Adapts to grid disturbance, load sharp fluctuation, unit start-stop and grid connection/disconnection conditions with fast transient response, improving grid stability and unit anti-disturbance capability.
5. Fault Self-diagnosis & Interlock Protection: Monitors main control, sampling, pulse, communication and power status in real time, blocks excitation output, triggers system alarms and uploads fault codes upon abnormalities to realize safety shutdown protection with system interlocks.
6. Remote Monitoring & Parameter Configuration: Supports two-way communication with DCS and SCADA systems for remote excitation parameter monitoring, parameter setting, control mode switching and fault uploading, adapting to intelligent operation and maintenance of power stations.
7. Redundant Bumpless Switching: In redundant architecture, the standby controller automatically takes over control seamlessly when the main controller fails without voltage or current fluctuation, ensuring uninterrupted stable operation of generator units.
IV. Working Principle
After power-on initialization and hardware self-inspection, the 3ADT218437R0001 main controller enters standby mode, completing hardware configuration, channel calibration and communication link matching with the entire Unitrol 6080 system.
During operation, the board high-speed collects key process parameters such as generator terminal voltage, stator current, rotor excitation current, grid frequency and bus voltage. The 64-bit floating-point CPU completes high-precision operation, dynamically calculates the optimal excitation control quantity through PID closed-loop algorithm by comparing the set values of voltage, reactive power and power factor.
The main controller outputs accurate thyristor trigger pulses according to the operation results, controls the conduction angle of the excitation rectifier power unit, and dynamically adjusts rotor excitation voltage and current to realize stable generator terminal voltage, accurate reactive power dispatching and controllable power factor.
Meanwhile, the board performs full-system status self-inspection continuously, monitors hardware faults, parameter over-limit and signal abnormalities, triggers protection logic such as over-excitation, under-excitation and overcurrent, blocks excitation output and uploads fault alarms when necessary. Redundant systems automatically complete main/standby channel switching without disturbance to ensure continuous and reliable operation of the excitation system.
V. Application Scenarios
1. Large Thermal Power Generating Units: Main control replacement, system expansion and technical renovation of Unitrol 6080 excitation systems for 300MW/600MW/1000MW thermal power units.
2. Large and Medium-sized Hydropower Units: Core main control matching and faulty spare part replacement of excitation control systems for hydropower station synchronous units, adapting to frequent load fluctuation working conditions of hydropower units.
3. Combined Cycle Gas Turbine Power Plants: New supporting construction, faulty main control module replacement and system performance optimization of gas turbine generator excitation systems.
4. Large Enterprise Self-owned Power Plants: Operation and maintenance spare parts and hardware upgrading of excitation systems for self-owned power plants in metallurgy, chemical and coal industries.
5. Energy Storage & Distributed Energy Power Stations: Excitation stability control of grid-connected synchronous units to improve grid connection adaptability and stability of new energy power stations.
