SWE Energie GmbH is a company of the Stadtwerke Erfurt Group and secures electricity, gas, and heat supply for Erfurt and the surrounding region as an energy service provider. SWE Energie GmbH is a company subject to the KRITIS regulation. At the HKW Erfurt Ost site, SWE Energie GmbH operates a combined heat and power (CHP) plant, which essentially consists of the following components:
GuD plant with three waste heat boiler systems (Line 1, Line 2, and Line 3), hot water generator, heat storage, power-to-heat plant
Due to changing political and market conditions (decarbonization), SWE Energie GmbH intends to increasingly focus on renewable energies in the future and plans to expand the existing heating plant according to its own transformation plan with various renewable energy plants. In addition to the transformation planning, the construction of a BESS is initially planned to strengthen the business area of electricity generation/marketing. The client intends to commercially operate the system by 01.07.2028 at the latest. The planning, delivery, construction, commissioning, and acceptance of a fully functional BESS are tendered. A symmetrical distribution of the BESS power to two 10 kV feed-ins of the existing plant is mandatory. The plant is to be set up outdoors (battery container, skid, possibly own consumption transformers, possibly short-circuit current limiting reactors (medium-voltage switchgear Ik = 40 kA)).
The BESS must meet the following services or requirements:
- Provision of control power: PRL, aFRR, mFRR, optionally instantaneous reserve
- Market-based operation, arbitrage (ID, DA, CID)
- Control of reactive power according to VDE-AR-4110 points 5.5 and 6.3.2 on request by the network operator
Parallel operation of two identical battery units with a power of 10 MW each and a capacity of 20 MWh each (total 20 MW power and 40 MWh capacity) is planned. Under the turnkey responsibility, the contractor must fully supply and design all necessary components and parts, particularly:
Inverter skids, own consumption transformers (Ik = 40 kA), control and regulation systems, battery containers
so that safe and unrestricted parallel operation of both units is ensured. All components are to be installed outdoors.
1. Scope of services and main components
The scope of services is understood as the turnkey construction (turnkey implementation) of the battery storage system by the contractor. This includes complete planning, delivery, assembly, commissioning, and handover ready for operation.
This includes:
- Battery container: total capacity of at least 40 MWh with a net power of 20 MW at the interface, including all internal DC cabling, battery management systems (BMS), fire protection and extinguishing systems, early fire detection and safety shutdown, as well as climate control inside the container.
- Inverter skid: complete outdoor platform (skid) equipped with the required battery inverters and associated controls.
- Own consumption transformers (EBT), concept for own consumption supply: Cooling of battery cells must be ensured when the 10 kV medium voltage is switched off.
- Noise protection measures: complete planning and implementation of all required noise protection measures (e.g., silencers for air conditioning units, noise-optimized inverter cooling, or housings) to reliably comply with the official emission limit values at the site.
- Contractor’s obligation to cooperate in obtaining the building permit and other official matters
2. Assembly, commissioning, and acceptance
- Delivery and assembly: The contractor is responsible for the complete transport (DDP site), unloading, lifting onto the foundations, as well as the complete mechanical and electrical assembly of all supplied system components within the scope of turnkey responsibility.
- Internal system wiring: The contractor must wire all inverter skids fully with the associated battery containers within the scope of the turnkey contract. This includes the complete laying and connection of all DC power cables, control and communication lines (e.g. BMS/EMS connection), as well as auxiliary power cabling between containers and skids.
- Commissioning: Execution of the commissioning of all subsystems up to the complete turnkey operational readiness of the overall system.
- Acceptance measurements: Execution of all contractually agreed performance and acceptance tests on site, especially capacity testing (capacity test for verification of the guaranteed useful energy).
- Support and ensuring certification according to VDE 4110 and VDE 4120 for the proper operation of the entire plant, as well as training of operating personnel
3. Interface definition (lot/trade separation), in particular:
Electrical engineering:
Connection to the upstream grid is carried out by the client on site.
- Interface: The physical and functional interface is located at the medium voltage connection terminals of the transformers on the skid and, if necessary, at the own consumption transformers.
Construction:
Civil works and foundation work are performed by the client on site.
- Interface: The top edge of the floor slabs or strip foundations.
- The client creates the foundations according to the static and dimensional specifications, which the contractor must provide in a timely manner as part of their planning services. Setting up, aligning, and anchoring the containers/skids on the foundations remains the responsibility of the contractor.
Control and regulation technology:
- EZA controller is within the contractor’s scope of services
- Provision of a communication interface
o to the upstream network operator (SWE Netz GmbH)
o to the marketer/energy trader/external service provider
o to the main control system of the existing production site
4. Maintenance contract
LOT-0001
LOT-0001 E015-2026
Construction of Battery Storage, Lot 2: Planning, Delivery, Construction, Commissioning, and Acceptance of a Battery Energy Storage System (BESS) with a Preferred Capacity of 20 MW and a Minimum Capacity of 40 MWh as a 2-hour Storage, Including Energy Management System, Fire Protection, Noise Protection, Control System Integration, EZA Controller, Maintenance and Service Contract, Training, and Documentation.
SWE Energie GmbH is a company of the Stadtwerke Erfurt Group and secures electricity, gas, and heat supply for Erfurt and the surrounding region as an energy service provider. SWE Energie GmbH is a company subject to the KRITIS regulation. At the HKW Erfurt Ost site, SWE Energie GmbH operates a combined heat and power (CHP) plant, which essentially consists of the following components:
GuD plant with three waste heat boiler systems (Line 1, Line 2, and Line 3), hot water generator, heat storage, power-to-heat plant
Due to changing political and market conditions (decarbonization), SWE Energie GmbH intends to increasingly focus on renewable energies in the future and plans to expand the existing heating plant according to its own transformation plan with various renewable energy plants. In addition to the transformation planning, the construction of a BESS is initially planned to strengthen the business area of electricity generation/marketing. The client intends to commercially operate the system by 01.07.2028 at the latest. The planning, delivery, construction, commissioning, and acceptance of a fully functional BESS are tendered. A symmetrical distribution of the BESS power to two 10 kV feed-ins of the existing plant is mandatory. The plant is to be set up outdoors (battery container, skid, possibly own consumption transformers, possibly short-circuit current limiting reactors (medium-voltage switchgear Ik = 40 kA)).
The BESS must meet the following services or requirements:
- Provision of control power: PRL, aFRR, mFRR, optionally instantaneous reserve
- Market-based operation, arbitrage (ID, DA, CID)
- Control of reactive power according to VDE-AR-4110 points 5.5 and 6.3.2 on request by the network operator
Parallel operation of two identical battery units with a power of 10 MW each and a capacity of 20 MWh each (total 20 MW power and 40 MWh capacity) is planned. Under the turnkey responsibility, the contractor must fully supply and design all necessary components and parts, particularly:
Inverter skids, own consumption transformers (Ik = 40 kA), control and regulation systems, battery containers
so that safe and unrestricted parallel operation of both units is ensured. All components are to be installed outdoors.
1. Scope of services and main components
The scope of services is understood as the turnkey construction (turnkey implementation) of the battery storage system by the contractor. This includes complete planning, delivery, assembly, commissioning, and handover ready for operation.
This includes:
- Battery container: total capacity of at least 40 MWh with a net power of 20 MW at the interface, including all internal DC cabling, battery management systems (BMS), fire protection and extinguishing systems, early fire detection and safety shutdown, as well as climate control inside the container.
- Inverter skid: complete outdoor platform (skid) equipped with the required battery inverters and associated controls.
- Own consumption transformers (EBT), concept for own consumption supply: Cooling of battery cells must be ensured when the 10 kV medium voltage is switched off.
- Noise protection measures: complete planning and implementation of all required noise protection measures (e.g., silencers for air conditioning units, noise-optimized inverter cooling, or housings) to reliably comply with the official emission limit values at the site.
- Contractor’s obligation to cooperate in obtaining the building permit and other official matters
2. Assembly, commissioning, and acceptance
- Delivery and assembly: The contractor is responsible for the complete transport (DDP site), unloading, lifting onto the foundations, as well as the complete mechanical and electrical assembly of all supplied system components within the scope of turnkey responsibility.
- Internal system wiring: The contractor must wire all inverter skids fully with the associated battery containers within the scope of the turnkey contract. This includes the complete laying and connection of all DC power cables, control and communication lines (e.g. BMS/EMS connection), as well as auxiliary power cabling between containers and skids.
- Commissioning: Execution of the commissioning of all subsystems up to the complete turnkey operational readiness of the overall system.
- Acceptance measurements: Execution of all contractually agreed performance and acceptance tests on site, especially capacity testing (capacity test for verification of the guaranteed useful energy).
- Support and ensuring certification according to VDE 4110 and VDE 4120 for the proper operation of the entire plant, as well as training of operating personnel
3. Interface definition (lot/trade separation), in particular:
Electrical engineering:
Connection to the upstream grid is carried out by the client on site.
- Interface: The physical and functional interface is located at the medium voltage connection terminals of the transformers on the skid and, if necessary, at the own consumption transformers.
Construction:
Civil works and foundation work are performed by the client on site.
- Interface: The top edge of the floor slabs or strip foundations.
- The client creates the foundations according to the static and dimensional specifications, which the contractor must provide in a timely manner as part of their planning services. Setting up, aligning, and anchoring the containers/skids on the foundations remains the responsibility of the contractor.
Control and regulation technology:
- EZA controller is within the contractor’s scope of services
- Provision of a communication interface
o to the upstream network operator (SWE Netz GmbH)
o to the marketer/energy trader/external service provider
o to the main control system of the existing production site
4. Maintenance contract