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Grid connection – a secure link between your substation and the electricity grid

The grid connection is the crucial link between your substation and the public transmission or distribution network. Only via a professionally planned and constructed line connection can the electricity generated by wind, solar or hydrogen plants be reliably fed into the grid. As experienced specialists in substations and grid connections in the voltage range from 10 to 380 kV, we plan and implement your grid connection on a turnkey basis – from initial planning through construction and installation to commissioning. This ensures you receive a safe, standards-compliant and on-time connection from a single source.

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WT Energiesysteme employee working on a high-voltage overhead power line with conductor cable and stringing pulley at a transmission tower.

The basics explained simply

What is a grid connection?

The grid connection – also known as a line connection or grid connection – refers to the technical interface via which a substation is connected to the higher-level transmission grid or the regional distribution network.

Everything under one roof

Our services relating to grid connection

As a full-service, turnkey provider, we manage the entire value chain of your grid connection – from planning right through to handover, ready for operation. We bring together engineering, construction, installation and commissioning under one roof and provide you with a single point of contact. Our range of services includes, in particular:

  • Planning and construction of overhead lines for connection to the high-voltage grid

  • Laying and connecting high-voltage cables (underground cables) up to 380 kV

  • Erection of the necessary steel structures, such as masts, gantries and cross-beams

  • Supply and installation of the complete primary equipment at the grid connection point

  • Coordination with the network operator and compliance with all technical connection requirements

  • Cable pulls across several bays in the 110 kV range, as well as the laying of fibre-optic cables

  • Testing, documentation and commissioning of the entire cable connection

The right choice

Overhead lines or high-voltage cables – the right solution

Whether a grid connection is implemented as an overhead line or as an underground high-voltage cable depends on a number of factors. Both options have specific advantages and disadvantages, which we will carefully weigh up together with you and the grid operator. Key factors include the voltage level, the distance to be covered, the topography, and environmental and regulatory requirements.

Regardless of the option you choose, we will plan and implement your grid connection in a technically sound, economically viable and fully compliant manner.

Overhead line

Cost-effective over long distances, easily accessible for maintenance and quick fault rectification.

High-voltage cables

Space-saving, unobtrusive in the landscape and unaffected by the weather.

Combined solutions

Flexible adaptation to local conditions and individual project requirements.

All-inclusive and hassle-free

Turnkey grid connection from a single source

Grid connection is an essential component of our turnkey substation projects. Through the close integration of engineering, construction, installation and commissioning, we ensure that the grid connection is seamlessly integrated into the overall project. This helps you avoid interface losses between different trades, save time and maintain full control over costs at all times. From the initial design phase through to approval by the energy supplier, detailed design, material procurement and work preparation, right through to installation and final connection, we coordinate every step for you. In doing so, we consistently take into account the grid operator’s technical requirements, local conditions and all relevant standards and guidelines.

What you can expect from our turnkey grid connection:

  • A single point of contact from the initial planning stage right through to handover

  • Safe and compliant construction in accordance with all applicable regulations

  • On-time delivery through coordinated project planning

  • Over 20 years’ experience in the construction of substations and grid connections

  • All relevant environmental and health and safety certifications from a single source

The driving force behind the energy transition

Grid connection for renewable energy and industry

A high-performance grid connection is essential if renewable energies are to play their part in the energy transition. We provide grid connections for a wide range of applications and tailor each solution specifically to your project:

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Wind turbines

Reliable transmission of the electricity generated by onshore and offshore wind farms.

Solar power systems

Connection of large solar farms to the energy supplier’s high-voltage grid.

Hydrogen production

Integration of electrolysers into the electricity grid.

Battery energy storage system (BESS)

Grid connection to stabilise the electricity networks.

Industry and energy suppliers

Reliable grid feed-in in the range from 10 to 380 kV.

Answers at a glance

Frequently Asked Questions about Network Connectivity (FAQ)

Grid connection refers to the line connection between a substation and the higher-level transmission or distribution network. It is via this connection that the electricity generated is fed into or drawn from the public grid. It can take the form of an overhead line, a high-voltage cable or a combination of both. The grid connection is therefore a central and safety-critical component of every substation project.

Working together towards the energy transition

Your partner for grid connection

As a medium-sized company based in Riesa and Dresden, we are one of the leading providers of substation construction in the renewable energy sector. For over 20 years, we have been planning, building and modernising substations and grid connections, and have already successfully commissioned more than 250 facilities. We bring this experience to bear in the planning and implementation of your grid connection – reliably, in accordance with standards and on schedule. Whether it’s an overhead line, a high-voltage cable or a combined solution: we ensure that your plant is connected to the grid safely and on schedule. Get in touch – together we’ll shape the energy transition and find the right grid connection for your project.

Robert Stefaniak

Sales Manager

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