ABB 3BDH000002R1 excitation system controller

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The generator voltage is maintained stable through the PID controller, reactive power compensation is supported, the digital output module provides control signals, drives the excitation winding and monitors the equipment status, the inverter is demagnetized during normal shutdown, and the excitation current is quickly cut off during emergency shutdown.

Technical parameters and core functions

1. Basic parameters

Model positioning: static excitation control module in ABB UNITROL series, modular digital exciter.

Input voltage: 100-240 V AC, input current 10-20 A.

Output voltage: 0-200 V AC, output current 0-20 A.

Insulation level: IP65, operating temperature range -25℃ to 60℃. ABB DSQC345D Module Card for Industrial Automation, PLC Control, 200 Characters or Less

2. Core functions

Excitation control:

Maintain generator voltage stability through PID controller and support reactive power compensation.

The digital output module provides control signals, drives the excitation winding and monitors the equipment status.

Monitoring and protection:

Rotor overvoltage protection: BOD board detects overvoltage, triggers the jumper to conduct, and consumes energy in the demagnetization resistor.

Demagnetization function: inverter demagnetization during normal shutdown, and quickly cuts off the excitation current during accident shutdown.

V/Hz limit: prevents excessive voltage at low frequency and protects the core flux density.

Communication capability:

Supports Ethernet, USB, RS232/485 interfaces, compatible with Modbus, Profibus and other protocols.

Can be integrated into ABB AC450/AC800PEC system to achieve cloud remote monitoring. ABB 3BHE022293R0101 PCD232A: Advanced Communication Interface Unit

3. Hardware configuration

Processor and memory: 32-bit CPU, 128MB memory, to ensure fast execution of complex algorithms.

Analog input channel: eight-channel analog voltage input, supports -5V to +5V or -10V to +10V dual mode, resolution of 0.2mV (5V mode) or 0.4mV (10V mode), accuracy of 0.05%.

Application scenarios and typical cases

1. Power industry

Yangxi Power Plant: UNITROL 6800 system is applied to 600MW units to achieve efficient excitation control.

Shenzhen Mawan Power Plant: Static excitation improves the response speed of the power grid and supports static excitation.

Fault case: A power plant tripped due to slow melting of the TV primary fuse, which was later solved by replacing spare parts and optimizing the protocol. ABB PCD230A101 3BHE022291R0101 - High-Performance Control Module