First South East European Regional CIGRÉ Conference - Portoroz, Slovenia, 7—8 June 2016 SEERC

Upgrade of SCADA system in remote control centres of Elektra Zagreb and Elektroslavonija Osijek

A. PIVČEVIĆ, I. KRAPIĆ, A. PREVIŠIĆ, A. VARŽIĆKončar-KET d.d.

Croatia

P26INŽENJERING ZA ENERGETIKUI TRANSPORTZ A G R E B

INŽENJERING ZA ENERGETIKUI TRANSPORTZ A G R E B

DC Elektroslavonija Osijek

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HP LP3065 HP LP3065 HP LP3065

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PCU server

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AD server

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WS500 Thin Clientserver

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HP LP3065

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HP LP3065

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1. INTRODUCTIONElektra Zagreb (Distribution System Operator) spans the area of 2 550 square kilometers. In addition to a plant placed in the center of Zagreb, plants at Sv. Ivan Zelina, Samobor, VelikaGorica, Zaprešić, Dugo Selo and Sveta Klara take care on the supply of the electric energy to buyers.

Elektroslavonija Osijek (Distribution System Operator) spans the area of 4152 square kilometers representing the fourth biggest Distribution System Operator of the Croatian Power Authority (HEP ODS).

Investments into upgrading of the existing equipment are indispensable to fulfil these basic DSO targets as well as its new roles which have come to light due to the liberalization of the electric energy market. The main reasons for the upgrade are:

• The producer of the hardware server equipment seized support forthe stated equipment in 2013 [1] and the hardware equipment had tobe replaced which automatically meant the replacement of thesoftware equipment;

• The producer of SCADA applications has been abandoning itssupport to Tru64 UNIX software platform;

• Implementation of new and enhanced existing SCADA software functionalities.

Figure 1 Block diagram of the new SCADA system at ElektroslavonijaOsijek

The logical scheme of the new control system can be seen on the following picture:

2. HW AND SW UPGRADE

New hardware system components (not existing in their current system configuration) on which part of functionality of the new SCADA software is distributed are the following:

• Active Directory servers – servers intended for user account control; and

• Process Communication Unit (PCU) 400 servers – communicationso-called front-end servers.

Computer Operating Systems in the new SCADA System have been upgraded to new versions in accordance with Table I while the Data Engineering and Utility Data Warehouse data bases are based on the most recent technology of Oracle Data Base.

Computers OS (existing system) OS (new system)

SCADA, UDW True64 UNIX Red Hat Enterprise Linux 6.5 64b

PCU400, Web, DE Windows Server 2003 Windows Server 2008 R2 64b

Operating stations Windows XP Windows 7 64b Pro

Table 1 Existing and new SCADA system Operating Systems

The existing SCADA system software has been upgraded from version 2.3 to version 6.4 enabling the Employer to work with a whole range of new and enhanced functionalities:

• Counting of events in the alarm list as well as in the event list on the basis ofvarious criteria (priority, etc.);

• User friendly lists – alarms, events, chronology (sorting, filtering, easiercreation of own filtered lists, export to Excel files, etc.);

• Dynamic Contour Coloring on the basis of measurement levels: clear andintuitive visualization of voltage disturbances;

• Advanced Real Time Calculations – user oriented interface for definingcomplex calculations on real time data and historical data based on theMATLAB software package;

• Tabular presentations – software module that enables users to define complexinterfaces based on real time data: list extracts, positioning in a certain queue,defining of the display size, hiding of selected columns, etc.;

• Multilanguage support;• Numerous “smaller”, but important novelties (permitted manual entry without

blocking of data collection, possibility to configure an alternative data sourcefor individual indications, etc.);

• The number of characters for EXTERNAL_IDENTITY parameter has beenincreased to 40, while for the IDENTIFICATION_TEXT it has been increasedto 60;

3. PARALLEL SYSTEM OPERATION

Končar has developed its own in-house solution for the needs of the migration process (the transitional period during which simultaneous operation of the existing and the new SCADA system is required) and to solve the problem of existing remote terminal units that do not have a possibility of a simultaneous communication with more than one supervising center

Figure 2 Parallel system operation

4. CONCLUSIONThe upgrade of the SCADA systems in the remote control centers of Elektra Zagreb and Elektroslavonija Osijek has given the users a modern SCADA system keeping up with the latest operating systems and advanced SCADA and DMS functions.