Modernization of unattended TS 110/6 kV in Senica

Bratislava, 22 March 2021

At the beginning of this year, ENERGY Distribution, a member of the ENGIE Group, successfully completed the reconstruction of the 110/6 kV transformer station (TS) in the industrial park in Senica. The aim of the modernization was to create an unmanned TS with connection to ENGIE’s central dispatching.

In 2018, ENERGY Distribution purchased and started operating a 110/6 kV transformer station (TS) with a capacity of 25 MW, through which it provides electricity distribution for the industrial and residential part of the industrial park in Senica, which will have a total area of 110 hectares upon completion. After taking over the station, the company commissioned a comprehensive retrofit study of the equipment. Its conclusions led to proposals for the replacement and modernisation of the technically obsolete HV and MV elements of the station in order to create an unmanned substation with a connection to the central dispatching centre.

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Original state: 110/6 kV transformer station

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Original state: 6 kV substation

The TS consists of an outdoor 110 kV type “H” substation, two 110/6.3 kV, 25MVA transformers, a 6 kV substation, self-consumption equipment, secondary equipment and a compressor station. The station was originally built as a service station, with permanent 24/7 operation by 4 employees. Control was provided manually, via control panels in the control room and control cabinets in the 110 kV and 6 kV substation. Based on the results and recommendations of the study, to ensure remote control and unattended operation, a new SCADA management information system (RIS) was built, the 6 kV substation was renovated, 110 kV switches and 110 kV protection were replaced, and transmission and self-consumption equipment was added. The premises of the new 6 kV substation were built in the former reactor room. The modernisation also included construction work in part of the 110 kV substation, where, after replacing the switches, the surface areas were modified for safety and static reasons.

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Modernised 110/6 kV transformer station

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Modernised 6 kV substation

“The new RIS SCADA now provides direct control of all 110 kV and 6 kV substation switches and disconnectors from ENGIE’s central control room, permanent measurement and signalling of TS conditions, fault signalling, data transmission, status, warning and alarm messages. The entire TS uses ABB technology, which is located in the building of joint operations (BSP) together with new 6 kV switchboards. RIS SCADA, which is connected to the central control room in the premises of our thermal power plant in Senica, allows us to control the entire TS remotely. The advantage of this solution is that even if our employees are not directly on the premises of the TS, we can intervene within a few minutes if necessary and resolve any faults personally,” explains Marián Horov, Senior HVAC Project Manager at ENGIE Services.The reconstruction of the 110/6 kV TS is not the first project of ENERGY Distribution. In 2018, it built and commissioned a 110/22 kV TS with a total capacity of 25 MW at the Logistics and Industrial Park in Velika Ida. ”

We are pleased that we have successfully completed another project in the area of construction and modernization of TS and fulfilled the objective of the reconstruction, which was to improve the efficiency of operation and increase the safety and continuity of electricity supply. The 110/6 kV TS in Senica is ready for further development and expansion of the Nová Hodvábka Park after the completion of the modernization,” concludes Marián Horov.

Engie