QREON’s system solution is based on four technologies:
- QREON Q82 wind turbine
- QREON photovoltaic plant
- QREON energy storage system
- Comprehensive energy management and control system
QREON’s system solution for decentralised solar and wind power generation incl. integrated energy store in the megawatt hour range.
- QREON Q82 wind turbine
Mechanical engineering
In terms of mechanical engineering, the design of QREON’s Q82 draws on tried-and-tested components used by renowned manufacturers of wind turbines to great effect.
Based on many years of practical experience, one of the most successful wind turbine designs used by manufacturers including General Electric, Nordex and Senvion (Repower) was applied to the Q82 wind turbine and its mainframe, cast hub, gearbox, bearing, pitch and yaw drives, tower and foundation.
This brought the following benefits:
The technology is based on empirical values from series production of over 1,000 wind turbines currently in operation and their components, which often define the industry standards (e.g. Svendborg, FAG, Bosch Rexroth and ZF, etc.).
Electrical engineering
The key electrical elements – i.e. the full converter, generator and control technology – meet the latest industry standards and have been expertly combined into an innovative complete system.
Advantages:
The technologies are exclusively based on well-established applications and thus on extensive practical experience in the field, often gained in the most challenging conditions.
Furthermore, the components meet the electrical requirements even for very remote locations and satisfy the strict feed-in conditions of energy providers even in difficult electric grid conditions and in isolated operation.
QREON’s full converter system (used in its original form by Vensys, Goldwind and Siemens, for example) has been augmented and enhanced with an energy store and photovoltaic installations in collaboration with one of the leading R&D system partners.
Using primarily Siemens components of a Siemens SPS with worldwide servicing (incl. replacement parts) and expert support (incl. training and on-site consultation) guarantees worldwide integration of the system when it comes to control technology, condition monitoring and SCADA.
Battery
The QREON Q82 is equipped with a fully integrated energy store as standard. The size varies depending on the application, ranging from 200 kWh to several MWh. The technology for the energy store and load and energy store management system is selected and adapted according to location-specific requirements, with technologies such as lithium-ion batteries or redox flow energy stores being used.
Advantages (depending on application):
- Standalone ability of the system (for isolated operation)
- Possibility of frequency stabilisation in weak networks
- Available compensating current
- Allows for voltage regulation and harmonic compensation
- Black start capability, i.e. power-up of supply grid after a blackout
- Provides reactive power
- Network frequency regulation
- Provides secondary operating reserve
- Prevents covering own consumption needs using the grid
- Realignment of turbine with current wind direction even in the event of a grid failure
Tower
The QREON Q82 was conceived for use in the remotest of locations and for production of turbine components in the local markets, and can be constructed using a variety of designs and hub heights of the turbine tower. Steel and lattice towers are available.
The unique, substantially maintenance-free lattice tower was developed in cooperation with the system partner Butzkies Stahlbau and is suitable for hub heights of well over 100 metres thanks to the steel components available. This results in significantly higher wind yields at relatively low additional investment costs and with otherwise unchanged technology due to the exponential increase in average wind speed with increasing height above the ground, vegetation and buildings.
The system partner Butzkies Stahlbau has over 100 years of experience in steelwork, having produced lattice towers for wind turbines that have been operational for many years. Furthermore, QREON is also working with the Fraunhofer Society and with ALCOA Fastening Systems on the maintenance-free “bobtail system” connection means.
Advantages:
Complete calculation, production drawings, and formwork and reinforcement plans for the foundations from a single source – for any desired hub height for optimum yield at the relevant site.
QREON Q82 wind turbine technical data
Design data
› Cut-in wind speed 3.0 m/s
› Nominal wind speed 13.0 m/s
› Cut-out wind speed 25.0 m/s
› Type class up to IEC II A
› Wind zone up to DIBt 3
1) Rotor blades
› Rotor diameter 82.4 m
› Blade material hybrid design GFRP (CFRP)
› Nominal speed 7 to 17.9 rpm
2) Pitch control
› Single-blade pitch control by electric motor
› Power control, blade angle and speed control
› Electrical pitch drives with separate energy store
3) Gearbox
› Planetary/spur gearing
› Nominal power approx. 2,200 kW
4) Generator
› Nominal power 2,300 kW
› Generator design: externally excited synchronous generator
5) Yaw system
› Type: active
› Drive type: electromechanical or hydraulic
6) Converter
› Rated apparent power 2,300 kVA
› Reactive power range 0.88 overexcited – 0.88 underexcited
- QREON photovoltaic plant
The solar plant is a highly predictable additional energy source for the QREON hybrid power plant. The system components have proven themselves over many years under the harshest of conditions and are designed by experienced system partners and integrated into the overall system, both in terms of design and execution. As a first step, the conditions at the site (geographical region, availability of suitable surfaces, etc.) are considered from an engineering point of view, and the optimum ratio between wind and achievable solar power is defined. The special features of the solar plant include the following:
› Highest possible efficiency, active single/double axis, intelligent tracking system
› Enables optimum utilisation of all irradiation energy
› 30% more yield than in standard applications
› Robust, durable technology
› Monitoring and real tracking with maximum light detection technology
› Snow sensor for cleaning
› Storm sensors for horizontal security position
› Lowest possible servicing costs and maintenance-free rotary drive
› Hot-dip galvanised steel/alloy substructure, 20-year warranty against corrosion
› Global references
› Complex condition monitoring and SCADA system
› Power control unit
› Glass-glass monocrystalline photovoltaic modules with 30-year linear power warranty (87% of peak power)
› Made in Germany
- QREON energy storage system
In order to ensure maximum durability and security of wind and solar energy supply, high-class energy stores are fully integrated into the QREON hybrid power plants. The technology is individually adapted to the requirements of energy consumers and the underlying conditions. The premium lithium energy stores from our system partner are most commonly used – see the following key data and advantages:
› Lithium-ion battery technology with cells from the industry leader
› Battery management system and turnkey solution designed and produced in Germany
› From 200 kWh up to several MWh for each system, with the highest energy density on the market
› Modular technology, maintenance-free
› Ultra-fast system response time
› Warranty > 8,000 cycles
› Grid-supporting features
› Island grid operation and uninterruptible power supply (UPS) functions
› Different operation modes with intelligent energy management: industry electricity bill saving, self-consumption, emergency power backup, peak-shifting, frequency regulation, renewable integration, etc.
› Integrated in the base of the tower or in a separate operation building
› Alternative energy storage solutions, e.g. redox flow battery
› Proven technology
- QREON Comprehensive energy management and control system
QREON’s energy management system operates the correct load flows at the required time in a site-specific manner, taking into account the predicted energy consumption figures and forecasts in relation to wind strength and insolation. The power produced from renewable sources thus becomes a stable quantity in the supply of an industrial facility, grid support and other applications, e.g. for stabilising weak medium-voltage networks.
The system coordinates the following at the energy sources:
› The reliable QREON wind turbine, compatible with different tower types for different wind and transport conditions
› The highly efficient photovoltaic plant
› Additional power generators, e.g. standby diesel generators yet to be integrated
› The central integrated energy storage system with 200 kWh to several MWh capacity connected to each wind turbine
› for grid-tied or island solutions and all the sub-systems
› based on reliable mechanical and electrical components that are easy to maintain using common technical methods and that have several gigawatts of operational experience
› in a modular design with a constant power supply for all site conditions and requirements
with
› certifications for worldwide installation
and with
› a support service for partner purchase, financing, assembly and maintenance
for sustainable and
› smart energy support for greater independence from the grid operator
and the energy management system with German engineering and
› Made in Germany