ABB UNITRAL1010 3BHE035301R0001 UNS0121A-Z-V1 Exciter

ABB UNITRAL1010 3BHE035301R0001 UNS0121A-Z-V1 Exciter

Basic Overview of Equipment

The ABB UNITOLO1010 3BHE035301R0001 UNS0121A-Z-V1 exciter is a high-performance synchronous generator excitation system core equipment launched by ABB Group. It is designed specifically for medium and large synchronous generators and is widely used in scenarios such as thermal power generation, hydropower generation, new energy supporting power stations, and industrial self owned power plants. This device is based on digital control and integrates multiple functions such as excitation regulation, power conversion, and protection monitoring. It can accurately control the excitation current and terminal voltage of the generator, ensuring stable output of the generator under various operating conditions, while improving the safety, stability, and power quality of the power grid.

Among them, "3BHE035301R0001" is the ABB standard equipment ordering number, used to accurately identify the product model and configuration; UNS0121A-Z.V1 "represents the version information of the device's core control module. Different versions may have slight differences in software functionality, compatibility, and other aspects, and a matching version should be selected based on specific application scenarios.

Core technical characteristics

1. Fully digital control architecture

The equipment adopts ABB's advanced digital control platform, and the core control unit is based on a 32-bit high-performance microprocessor, with fast computing speed and high control accuracy. Through modular design, independent operation and collaborative cooperation of excitation regulation, logic control, fault diagnosis and other functions are achieved, reducing the failure rate of traditional analog control circuits while improving the flexibility and scalability of the system. The control software supports online parameter modification and function upgrade, and maintenance and adjustment can be completed without stopping the machine, greatly improving equipment operation efficiency.

2. Accurate excitation regulation function

It has multiple excitation regulation modes, including constant terminal voltage regulation, constant excitation current regulation, constant power factor regulation, and constant reactive power regulation, which can be flexibly switched according to the operation needs of the power grid. The regulating system adopts adaptive PID control algorithm, which can quickly respond to disturbances such as voltage fluctuations and load changes in the power grid. In extreme working conditions such as generator start stop and load shedding, it can quickly stabilize the terminal voltage and avoid damage to equipment and the power grid caused by overvoltage or undervoltage. In addition, the device also supports linkage with the power grid dispatch system to achieve automatic allocation and optimization of reactive power.

3. Improved protection and monitoring mechanisms

Integrated with comprehensive fault protection functions, including overexcitation protection, underexcitation protection, overvoltage protection, undervoltage protection, excitation circuit overcurrent protection, rotor grounding protection, etc. When the device detects abnormal working conditions, it can trigger protection actions within milliseconds, by cutting off the excitation circuit, issuing alarm signals, etc., to prevent the fault from expanding and protect the safety of the generator, exciter, and related equipment. At the same time, the equipment is equipped with high-precision monitoring modules that can real-time collect key operating parameters such as excitation voltage, excitation current, terminal voltage, rotor temperature, etc., and upload them to the monitoring system through the human-machine interface (HMI) or communication interface, making it convenient for operation and maintenance personnel to grasp the real-time operation status of the equipment.

4. High reliability and environmental adaptability

In terms of hardware selection, ABB industrial grade components are used and undergo rigorous reliability testing to ensure stable operation of the equipment in harsh industrial environments. The device supports a wide range of input voltage and frequency fluctuations, adapting to different regional power grid conditions; The cooling system adopts intelligent temperature control design, which can automatically adjust the cooling power according to the ambient temperature and adapt to the working temperature range of -20 ℃~60 ℃. In addition, the equipment also has design features such as anti electromagnetic interference and anti vibration, meeting the operational requirements of complex electromagnetic environments such as power plants.

5. Convenient communication and operation functions

Supports multiple mainstream communication protocols, such as Modbus, Profibus, Ethernet/IP, etc., and can seamlessly integrate into power plant DCS systems or third-party monitoring platforms to achieve remote data transmission and centralized monitoring. The human-computer interaction interface adopts a touch screen displayed in Chinese, with simple and intuitive operation. Operations personnel can complete parameter settings, fault queries, historical data tracing and other operations through the interface. The equipment also has self diagnostic function, which can automatically identify module faults, communication abnormalities and other issues, and provide specific fault location and handling suggestions, reducing the difficulty and cost of operation and maintenance.

Key technical parameters

Rated excitation voltage

According to the generator model matching, the conventional range is 50V~1000V DC

Customizable according to generator rotor parameters

rated field current 

According to the generator model matching, the conventional range is 50A~2000A DC

Support short-term overload operation (1.5 times rated current, lasting for 30 seconds)

adjustment accuracy

Terminal voltage regulation accuracy ≤± 0.2% (rated value)

Low voltage fluctuation during steady-state operation

response time

Step response time ≤ 100ms

Quickly respond to power grid disturbances

input power

AC 380V/220V，50/60Hz， Allow fluctuation of ± 15%

Adapt to different power grid supply conditions

communication interface

1 Ethernet interface, 2 RS485 interfaces

Support multiple communication protocols

working environment

Temperature: -20 ℃~60 ℃; Humidity: ≤ 95% (no condensation); Altitude: ≤ 2000m (beyond which capacity reduction is required)

Adapt to harsh industrial environments

Typical application scenarios

-In the field of thermal power generation: supporting 300MW~1000MW level thermal power units, providing stable excitation for steam turbine generators, ensuring voltage stability during variable load operation, enhancing unit peak shaving capability and grid connected operation safety.

-In the field of hydroelectric power generation, it is suitable for various types of hydro generators, especially in hydropower stations with large head fluctuations. It can compensate for the impact of head changes on generator output through precise excitation adjustment, and improve power generation efficiency.

-New energy support: In the energy storage and frequency regulation system of wind and photovoltaic power plants, as the excitation equipment of the synchronous phase-shifting camera, it helps to stabilize the volatility of new energy generation and enhance the power grid's ability to absorb new energy.

-Industrial self owned power plants: provide excitation control for self owned power plant generators in industries such as steel, chemical, and cement to ensure stable supply of electrical energy during industrial production and avoid voltage fluctuations affecting production equipment.

Key points for installation and maintenance

1. Installation requirements

The equipment should be installed in a well ventilated, dust-free, and non corrosive gas control room or switchgear, and the installation location should be away from strong magnetic field interference sources; During the installation process, it is necessary to ensure reliable grounding of the equipment, with a grounding resistance of ≤ 4 Ω; Cable wiring should be strictly carried out according to the electrical schematic diagram to avoid equipment damage caused by incorrect wiring; Adequate heat dissipation space should be reserved between the equipment and the cabinet to ensure smooth heat dissipation.

2. Maintenance suggestions

-Daily maintenance: Regularly clean the dust on the surface of the equipment and the cooling vents, check whether the wiring terminals are loose, and observe whether the operating parameters displayed on the HMI interface are normal.

-Regular maintenance: Conduct a comprehensive inspection of the equipment every 6 months, including component appearance, insulation performance testing, cooling system operation status, etc; Perform an annual version check on the control software and promptly upgrade and optimize its functions.

-Fault handling: When the equipment malfunctions and alarms, the fault code should be queried through HMI first, and the fault prompt should be used for positioning and troubleshooting; When replacing a module, it is necessary to ensure that the new module model is consistent with the original module, and after replacement, parameter configuration and debugging need to be carried out again.