Description
ABB UNITROL 1010 3BHE035301R0004 Product Description
Product Overview
ABB UNITROL 1010 3BHE035301R0004 is a digital automatic voltage regulator (AVR) and excitation controller from ABB’s UNITROL 1000 excitation system family. It is designed for synchronous generators and motors, providing precise voltage regulation, excitation control, generator protection functions, and system monitoring.
The UNITROL 1010 is particularly suited to small and medium-sized synchronous generators, including applications in power plants, industrial generation, hydropower and distributed generation.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | ABB |
| Product Family | UNITROL 1000 |
| Model | UNITROL 1010 |
| Order Number | 3BHE035301R0004 |
| Product Type | Digital Automatic Voltage Regulator / Excitation Controller |
| Application | Synchronous generators and motors |
| Control Function | Automatic voltage regulation |
| Excitation Control | Field excitation control |
| Regulation | Digital closed-loop control |
| Communication | Digital communication / service interface depending on configuration |
| Monitoring | Generator and excitation-system measurements |
| Protection | Generator/excitation protection functions |
| Installation | Control cabinet / excitation system |
| Typical Applications | Hydro, steam, gas and industrial generators |
Main Features
Automatic Voltage Regulation
The primary function of UNITROL 1010 is to regulate generator terminal voltage by controlling the excitation current of a synchronous generator.
A typical control loop is:
Generator → Voltage Measurement → UNITROL 1010 AVR → Exciter → Generator Field
The controller continuously compares the measured generator voltage with the reference value and adjusts excitation to maintain stable terminal voltage.
Digital Excitation Control
UNITROL 1010 uses digital control technology to provide accurate and stable excitation regulation. Digital parameters can be configured for generator operating requirements, including voltage reference, response characteristics and excitation limits.
UNITROL1010
Generator Operating Stability
The excitation controller contributes to stable generator operation during:
- Load changes
- Parallel operation
- Grid disturbances
- Reactive-power changes
- Generator startup and shutdown
- Synchronization
Excitation Limiting and Protection
Depending on the specific UNITROL 1010 configuration, the excitation controller can incorporate limiting and protection functions associated with generator operation, helping prevent excessive excitation and abnormal operating conditions.
Typical functions in the UNITROL 1000 family include:
- Overexcitation limiting
- Underexcitation limiting
- Field-current limitation
- Generator voltage limitation
- V/Hz-related protection
- Excitation-system monitoring
The exact enabled functions depend on the specific firmware and configuration.
Application Fields
Hydroelectric Generation
UNITROL 1010 is suitable for excitation control of hydro generators, where stable voltage regulation and reactive-power control are required over a wide operating range.
Industrial Power Generation
The controller can be used with synchronous generators in industrial plants, including captive-power and cogeneration systems.
Steam and Gas Turbines
For turbine-driven synchronous generators, the UNITROL controller regulates generator excitation and helps maintain voltage and reactive-power stability.
Distributed Generation
The system can be applied to smaller synchronous generating units connected to industrial or utility networks.
Synchronous Motors
UNITROL 1000-family excitation controllers can also be used for excitation control of synchronous motors where field regulation is required.
System Integration
A typical UNITROL 1010 excitation system consists of:
Generator PT/CT → UNITROL 1010 → Exciter/Power Stage → Generator Rotor Field
The AVR receives generator voltage and current feedback, processes the measurements using its digital control algorithms, and produces the excitation-control signal.
For plant integration, the excitation controller can exchange operating information with a higher-level DCS, PLC or SCADA system, depending on the installed communication/interface configuration.
UNITROL 1000 Family
The UNITROL 1000 family includes several controller variants designed for different generator sizes and excitation requirements.
Related products include:
- UNITROL 1000 — compact digital excitation controller family.
- UNITROL 1010 — excitation and automatic voltage regulation for synchronous machines.
- UNITROL 1020 — higher-capability UNITROL 1000-series excitation controller.
- UNITROL 1020 Compact — compact excitation-control configuration.
- UNITROL F — static excitation system for larger generators.
- UNITROL 6000 — high-performance excitation system for large synchronous machines.
