励磁系统原理图

AC voltage is connected via rectifier to R-C-filter

Resistors Capacitor
Rectifier
Fuse

© Copyright 2002 ABB - 37 -
Protect Thyristors from overvoltage Reduce commutation peaks Prevent self-firing of thyristors Absorb energy in case of a lightning strike
© Copyright 2002 ABB - 41 -
© Copyright 2002 ABB - 42 -
UNITROL®5000 – CIN
UNITROL®5000 – CIN

Converter Interface Link between COB and GDI Current equalisation Conduction Monitoring
Input signals can be linked onto 2 trip channels
© Copyright 2002 ABB - 28 -
© Copyright 2002 ABB - 29 -
UNITROL®5000 – AIO
UNITROL®5000 – AIO

Analog Input Output I/O Interface via ARCnet 8 analog inputs 8 analog outputs

Display of 8 error messages Plant specific keys with LED
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UNITROL®5000 – ECT

Excitation Control Terminal Different Screens
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UNITROL®5000 – COB
UNITROL®5000 – COB

Controller Board Central processor unit of UNITROL®5000 Firmware and application
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UNITROL®5000 – Fan box

Cooling of converter Possibility of redundant fan Airflow monitoring with flaps Possibility of replacing single fan
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UNITROL®5000 – DIO
UNITROL®5000 – DIO

Digital Input / Output Used together with FBC 16 Digital inputs 16 Digital outputs
UNITROL®5000 – FBC

Fieldbus Coupler I/O interface via ARCnet

32 digital inputs 32 digital outputs
© Copyright 2002 ABB - 22 -
© Copyright 2002 ABB - 23 -
UNITROL®5000 – FIO

Fast Input/Output Interface between process signals and COB

16 digital inputs 18 digital outputs


4 analog outputs
3 analog inputs Input for crowbar current measurement 3 amplifier inputs for current, voltage or resistance measurement

Disconnect bridge from power circuit (AC and DC) for maintenance
© Copyright 2002 ABB - 39 -
UNITROL®5000 – Converter Bridge

Thyristors Branch fuses Overvoltage protection Converter Isolator Cooling system
UNITROL®5000 – DII
UNITROL®5000 – DII

Digital Input Interface Used together with FBC 16 galvanically isolated binary inputs
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ABB (China) Ltd Martin Affolter
Close look of UNITROL® 5000 components
© Copyright 2002 ABB. All rights reserved. - 1 9/2/2015
UNITROL®5000 – Content

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UNITROL®5000 – Converter
UNITROL®5000 – Converter Bridge

Thyristors
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UNITROL®5000 – Thyristor

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UNITROL®5000 – MUB
UNITROL®5000 – MUB

Measuring Unit Board Measuring Ug and Ig Diode monitoring PSS (according IEEE)


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UNITROL®5000 – Converter Bridge

Thyristors Branch fuses

Overvoltage protection
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UNITROL®5000 – Overvoltage protection
PT-fail and other monitoring functions
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© Copyright 2002 ABB - 8 -
UNITROL®5000 – EGC
UNITROL®5000 – EGC

Extended Gate Controller Backup current regulator Backup overcurrent relay Inverse time and instantaneous
© Copyright 2002 ABB - 25 -
UNITROL®5000 – ROI
UNITROL®5000 – ROI

Relay Output Interface Used together with FBC 16 relay outputs
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Backup thyristor branch monitoring
© Copyright 2002 ABB - 9 -
© Copyright 2002 ABB - 10 -
UNITROL®5000 – PSI
UNITROL®5000 – PSI

Power Signal Interface Pre-processing of:

3“ Flat Thyristors 1 Thyristor per branch 6 per converter bridge Mounted between heatsinks
© Copyright 2002 ABB - 33 -
UNITROL®5000 – Converter Bridge

Thyristors Branch fuses
© Copyright 2002 ABB - 34 -
UNITROL®5000 – Branch Fuse

Disconnect branch in case of thyristor short circuit Enables redundancy, only faulty converter will be blocked Indication of blown fuse
Overview about components used in UNITROL®5000 System in plant can be different from this presentation
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பைடு நூலகம்
UNITROL®5000 – Single line Diagram

Operation menu Power chart Single line diagram Trending Fault and event recorder

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UNITROL®5000 – POW

Synchronous voltage Field voltage AC field current DC field current (optional)
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© Copyright 2002 ABB - 12 -
UNITROL®5000 – FIO

UNITROL®5000 – Converter Bridge

Thyristors Branch fuses Overvoltage protection Converter Isolator

© Copyright 2002 ABB - 38 -
UNITROL®5000 – Convertor Isolator
UNITROL®5000 – POW

Power Supply and input filter Convert AC or DC power to 24Vdc
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UNITROL®5000 – FBC
© Copyright 2002 ABB - 16 -
UNITROL®5000 – LCP
UNITROL®5000 – LCP

Local Control Panel Display of analog values

8 signals with name, value and unit

4 signals with bar display
© Copyright 2002 ABB - 13 -

© Copyright 2002 ABB - 14 -
UNITROL®5000 – SPA
UNITROL®5000 – SPA

Service Panel Used for maintenance and service
© Copyright 2002 ABB - 15 -
Monitoring functions

Branch current Temperature
Status messages from Isolator
Status messages from snubber
© Copyright 2002 ABB - 43 -