Generator excitation

Turbogenerator excitation

Turbogenerator excitation is implemented according to the type of excitation system as one of the following solutions: AVR Safety, AVR Power, or AVR Compact. The AVR Z110 regulator is designed as a single-board module and includes thyristor phase control, programmable logic devices (PLDs), two ARM-based microcontrollers, and communication adapters for USB, RS232, and Ethernet.

The regulator's control panel is integrated into the cabinet door along with a keypad. The panel features several types of screens that provide complete information on the status of the excitation system and the generator’s measured values. It also includes control buttons for local excitation operation. A similar control panel is available for installation in the unit control room.

The turbogenerator excitation control system can be extended with a generator synchronizer, implemented using the DSD Z110 module, which is also a single-board design and includes analog measurement inputs, programmable logic devices, two ARM-based microcontrollers, and communication adapters for USB, RS485/422, and Ethernet.

The AVR Safety excitation regulator complies with Category C safety functions according to ČSN EN 61226 and is implemented on the SandRA platform. It is communication-connected to the Unit Control and Information System (UCIS).

Diesel generator excitation

Diesel generator excitation is implemented using the AVR Safety system.

The diesel generator is intended for emergency power supply to the primary circuit of the nuclear power plant. The excitation system ensures precise regulation of the generator stator voltage and other parameters related to generator control by adjusting the excitation current.

The system performs Category A safety functions according to ČSN EN 61226. It is implemented on the SandRA Z110 platform. The regulator is communication-connected to the Unit Control and Information System (UCIS).

The diesel generator excitation control system, supplied by ZAT a.s., can be designed and implemented according to customer requirements, either as a complete system replacement or as a partial retrofit of the excitation control section.

Main functions of the voltage regulator:

Voltage and reactive power regulation
Voltage matching before synchronizing the generator to the grid
Zero reactive power setting before disconnecting the generator from the grid
Regulation of the excitation current during tests and loss of stator voltage measurement
Inverter operation of a thyristor rectifier for operational excitation of the generator
Stator and rotor current limiters
Voltage limiter and U/f limiter
Under-excitation limiter
System stabilizer
Generator phaser
PLC controller, fault diagnostics, and automatic switching between channels

Tabulka Buzení Regulátoru Buzení 2 EN

Function of the synchronization device:

Automatic closing of the generator circuit breaker

Monitoring and control of closing

Important references

Enguri Hydroelectric Power Plant

Excitation system replacement – TG2

Georgia, 2025
Hydroelectric Power Plant Štěchovice – TG3

Excitation migration of TG3

CZ, 2024
10 excitation units at hydroelectric power plants – Slovakia

Modernization of 10 excitation units

Slovakia, 2024
Kyzylorda Power Plant

Delivery of turbine turning synchronization

KAZ, 2024
Chvaletice Power Plant

Delivery of turbine turning synchronization

CZ, 2024
Golfech Nuclear Power Plant

Delivery of KCF system (2x PWR 1330)

France, 2024
Gas transfer station Hospozín

Control system reconstruction

CZ, 2023
Opatovice Power Plant

Replacement of control system and field instrumentation - TG3

CZ, 2023
Plzeňská teplárenská - TGS

Delivery of turbine turning synchronization

CZ, 2023
Jafurah Cogeneration Power Plant

Delivery of turbine turning synchronization

SAE, 2023
Tanajib Cogeneration Power Plant

Delivery of 2 turbine turning synchronization systems

SAE, 2023
Temane Thermal Power Plant

Delivery of turbine turning synchronization

Mozambik, 2023
Olefin chemical plant

Delivery of 2 turbine turning synchronization systems

Polsko, 2023
Waterworks Lipno

Modernization of the control system on the SandRA platform

CZ, 2022
Custom production

Production of 140 pieces of a medical device for a customer

CZ, 2022
Gas transfer control station Makotřasy

Control system reconstruction

CZ, 2022
Slough waste incineration plant

Delivery of turbine turning synchronization

Velká Británie, 2022
Belleville Nuclear Power Plant

Delivery of KCF system (2x PWR 1330)

France, 2022
Transfer control station Krupá

Control system and boiler room reconstruction

CZ, 2021
Cathodic protection station Skalice nad Svitavou

Wireless measurement from cathodic protectors

CZ, 2021
Heating plant Příbram

Reconstruction of the boiler control system due to transition to another fuel

CZ, 2021
Heating plant in Tabor

Migration of the boiler control system in connection with fuel change

CZ, 2021
Biogas station Dlouhá Lhota

Supply of control system and monitoring system with Simatic S7-300 PLC and Reliance visualization

Czech Republic, 2021
WWTP Tuchlovice

Delivery of Schneider control and monitoring system

CZ, 2021
Coal preparation Ledvice

Delivery of Siemens S7 1500 control system for coal conveyor belt control

CZ, 2021
Waterworks Žilina

Reconstruction of excitation controllers TG1 and TG2

SK, 2021
Railway line Oldřichov u Duchcov - Bílina

Implementation of Remote Diagnostics and Technological Systems

CZ, 2021
Railway station Strakonice

Addition of Remote Diagnostics of Technological Systems

CZ, 2021
Dubai waste incineration plant

Delivery of turbine turning synchronization

SAE, 2021
Lostock waste incineration plant

Delivery of turbine turning synchronization

Velká Británie, 2021
Kemi waste incineration plant

Delivery of turbine turning synchronization

Finsko, 2021
Transfer station Libenice

Control system and boiler room reconstruction

CZ, 2020
Railway station Jaroměř

Reconstruction and implementation of Remote diagnostics of technological systems

CZ, 2020
Plzeň junction, 3rd construction - Domažlice railway crossing

Implementation of Dispatching Control Technology

CZ, 2020
Underground storage tank Štramberk

Reconstruction of the compressor station control system

CZ, 2020
Nogent-Sur Seine Nuclear Power Plant

Delivery of KCF system (2x PWR 1330)

France, 2020
Compression station Veselí nad Lužnicí

Control system of the pipe yard

CZ, 2019
Distribution node Rozvadov

Control system reconstruction

CZ, 2019
Empalme Thermal Power Plant I,II

Delivery of 2 pieces of excitation generators 300 MW

Mexico, 2019
Acerra incinerator

Upgrade of steam turbine control system from Simatic - Simadyn instrumentation to Simatic S7-400 instrumentation

Italy, 2019
Temelín Nuclear Power Plant

Reconstruction of the I&C wastewater treatment plant, project B607

CZ, 2019
Metsamor Nuclear Power Plant

Unit 2 - control system for group and individual control of VVER 440 nuclear reactor rods

Armenia, 2019
Railway line Týniště nad Orlicí - Broumov

Implementation of Dispatcher Control Technology and Remote Diagnostics of Technological Systems

CZ, 2019
Penly Nuclear Power Plant

Delivery of KCF system (2x PWR 1330)

France, 2019
Grati Thermal Power Plant

Delivery of the steam turbine control and protection system, field instrumentation, and cabling

Indonesia, 2019
Škoda Auto

Support for shop floor management through visualisation of production data on electronic boards

CZ, 2018
Underground storage tank Štramberk

Reconstruction of the control system of the drying and regeneration section

CZ, 2018
Mochovce Nuclear Power Plant

Replacement of the Group and Individual Control System for Reactor Control Mechanisms (RRCS), Unit No. 1 and No. 2

Slovakia, 2018
Health +

Making pharmacy report data, test results and recommended medications available to patients

ČR, 2017
Heating plant Katowice

Reconstruction of turbine control system, reconstruction of 120 MW generator excitation

Poland, 2017
Waterworks Kořensko

Modernization of the control system on the SandRA platform

CZ, 2017
Jirkal Komaxit

Replacement of the existing relay control of the spray line with the modern ZAT SandRA Z210 series control system

CZ, 2017
Flamanville Nuclear Power Plant

Delivery of KCF system (2x PWR 1330)

France, 2017
CEPS

Specialized system providing advanced process support across the company CEPS

Czech Republic, 2016
Heating plant Písek

Reconstruction of electrostatic precipitator source control - boilers K11 and K12

CZ, 2016
Lisbjerg Incinerator

Delivery of the steam turbine control system, related field instrumentation, and cabling

Denmark, 2016
Thermal Power Plant Morupule

Delivery of synchronization of turbine rotating equipment

Botswana, 2016
Hanhikivi Nuclear Power Plant

Implementation of part of the conceptual project of the Group Control System, Unit 1

Finland, 2016
Cattenom Nuclear Power Plant

Delivery of KCF system (4x PWR 1330)

France, 2016
Saint-Alban Nuclear Power Plant

Delivery of KCF system (2x PWR 1330)

France, 2016
Jaslovské Bohunice Nuclear Power Plant

Replacement of the Group and Individual Control System for Reactor Control Mechanisms (RRCS), Units 3 and 4

Slovakia, 2016
Small hydroelectric power plant Střekov

Modernization of excitation regulators TG1 to TG3

CZ, 2016
HEC Services

Intelligent system for automatic collection, processing and application of data on electricity supply and consumption

CZ, 2015
Thermal Power Plant Gardabani

Supply of steam turbine control and protection system, field instrumentation and cabling

Georgia, 2015
Paluel Nuclear Power Plant

Delivery of KCF system (4 x PWR 1330)

France, 2015
School reactor CTU, FJFI Prague

VR-1 school training reactor information system including web services

CZ, 2015
Biogas station Slatina

Supply of control system and monitoring system, including connection to heat conductor

Czech Republic, 2014
CZ LOKO

System for financial management, budgeting, controlling and forecasting

Czech Republic, 2014
Emerson Climate Technologies

Custom information system for collaboration between engineering and test lab

CZ, 2014
Heating plant Strakonice

K2 boiler control, new application software including visualization

CZ, 2014
Trams in Turkey

Air conditioning inverters for trams Konya Turkey

Turkey, 2014
Biogas station Stanoviště

Supply of control system and monitoring system

Czech Republic, 2013
Heating plant Dvůr Králové

Delivery of SW works of acoustic cleaners of K2 output superheater

CZ, 2013
Zellstoff Stendal GmbH Incinerator

Delivery of the steam turbine control system, related field instrumentation, and cabling

Germany, 2013
Biogas station Mýšlovice

Supply of control system and monitoring system

Czech Republic, 2012
Biogas station Dvorianky

Supply of control system and monitoring system

Slovakia, 2012
Thermal Power Plant Vojany

Reconstruction of turbine controller B16

SK, 2012
Biogas station Smolotely

Supply of control system and monitoring system with Simatic S7-300 PLC and Reliance visualisation

Czech Republic, 2012
Thermal Power Plant Talkha

Replacement of generator excitation, reconstruction of turbine control system

Egypt, 2011
CBRE Global Investors Central Europe

Applications for commercial buildings supporting the budget-making processes and their approval

Europe, 2009
Čepro

Extranet solution for recording, processing and analysis of corrosion cathodic protection data

CZ, 2007
Innogy

Extranet solution for recording, processing and analysis of corrosion cathodic protection data

CZ, 2007
Mero

Extranet solution for recording, processing and analysis of corrosion cathodic protection data

CZ, 2007
South Ukrainian Nuclear Power Plant

Control system for group and individual control of nuclear reactor rods VVER 1000, Units 2 and 3

Ukraine, 2005
Chmelnicka Nuclear Power Plant

Control system for group and individual rod control of VVER 1000 nuclear reactor, unit 2.

Ukraine, 2004
Rovenská Nuclear Power Plant

Control system for group and individual control of control units/rods of VVER 1000 nuclear reactor, unit 4.

Ukraine, 2004
Zaporozhye Nuclear Power Plant

Control system for group and individual control of the rods of the VVER 1000 nuclear reactor, Units 3 and 4.

Ukraine, 2004
Compass Group

Collection and processing of accounting data in a distributed branch accounting system

Czech Republic, 2000