High-Voltage Installations and Primary Substations
HV Installations / Primary Substations
HV Installations / Primary Substations Comprehensive Delivery of 110 kV / MV
Substations High-voltage (HV) installations constitute a critical element of the national power system. A primary substation (GPZ) is a strategic substation where electrical energy is transformed from the 110 kV level to medium voltage (MV) and subsequently distributed to industrial, municipal, and infrastructure consumers.
Symetrium delivers projects in the construction, modernization, and expansion of 110 kV/MV substations, ensuring comprehensive investment management – from concept, design, and execution to commissioning and maintenance support.
Scope of Offer
Our Competencies
Design and Project Preparation
We offer full design support for high-voltage power investments:
- development of technical concepts and pre-investment analyses
- building and detailed designs of 110 kV/MV substations
- designs for outdoor and indoor gas-insulated switchgear (GIS) substations
- documentation for power transformers
- arrangements and approvals with DSOs / TSO (PSE) as well as formal and legal support
- interdisciplinary coordination (electrical, telecommunications, civil/structural)
We execute investments under the “Projektuj i Buduj” formula.
Construction and Expansion of 110 kV / MV Substations
The scope of construction and installation works includes:
- construction of new primary substations
- expansion of existing facilities (adding 110 kV / MV bays)
- installation and replacement of power transformers
- installation of 110 kV switchgear (AIS / GIS)
- construction of MV switchgear and auxiliary power systems
- execution of earthing and lightning protection systems
- delivery of cabling and grid connection infrastructure
We ensure coordination of all engineering disciplines as well as supervision over the schedule and work safety.
Automation, Protection, and Telecontrol Systems
Modern power substations require advanced automation and diagnostic systems. In this area, we offer:
- installation and configuration of power system protection (PSP) devices
- substation automation systems (SAS)
- integration with SCADA and telecontrol systems
- disturbance recording and power quality monitoring systems
- implementation of communication standards (IEC 61850)
- FAT/SAT testing and facility commissioning
We integrate power systems with energy management systems (EMS) and monitoring solutions.
Modernizations and Reliability Enhancement
The modernization of primary substations allows for an increase in regional energy security and the optimization of operational costs. We offer comprehensive substation retrofits aimed at:
- increasing grid connection capacity
- improving power supply reliability
- alignment with current standards and operators’ requirements
- integrating renewable energy sources (RES) with 110 kV/MV infrastructure
- replacing obsolete protection systems and apparatus
Service, Testing, and Operations Maintenance
We provide operational support:
- periodic inspections and protective measurements
- diagnostics of power transformers
- testing of protection systems and automation circuits
- support during UDT (Office of Technical Inspection) and DSO acceptance procedures
- rapid response maintenance interventions
