QTE energy management – intelligent and unique
QTE – competent and economic Are you in search of an efficient solution for your energy management or high-quality engineering services? Then QTE is absolutely the right partner for you. We develop customized, individual solutions that are precisely tailored to your needs. Whether you need targeted assistance for specific topics or comprehensive consulting and support or from the initial concept and all the way up to the implementation of your energy management solution – QTE is always the right choice. You can rely on our many years of experience as well as our mission statement “experience gained from practice is implemented in practice”. Thanks to our efficient and economic work approach, you can always be assured that our services are provided with an optimal price-performance ratio. Put our expertise to the test.
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Smart solutions for a smart energy Alternative energy is an important part of our energy supply. This development is further fueled through a rapidly changing business environment as well as new technologies. But what good is a state-of-the-art facility, if the controller technology behind it is inefficient or even prone to failure, and thus poses a risk for economic losses? QTE can provide you with high quality solutions which are able to fulfill the statutory requirements, while at the same time guaranteeing an economically optimized utilization of your system, and through this help you to attain the best possible benefits. Convince yourself of the performance capabilities that our solutions can deliver for your energy management.
Thomas Eusterwiemann, managing director of QTE GmbH, Energy Management Auditor
Our service for your energy management As your partner for matters revolving around the subject of energy management, we are able to offer you the perfect solution for any kind of requirement and system – even on short notice and always customized to your needs.
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• Comprehensive consulting • Implementation of special solutions • Easily performable remote update of the controller units • Convenient and fast remote maintenance • Availability of service 365 days a year, 24 hours a day
“Will gladly do business again. Solutions were created in a collaborative effort until the project was successfully completed even when problems or difficult circumstances arose.” Tobias Reiter, SUN GARANT MUC GmbH
QTE feed-in solutions – compact and economical
In many cases, the feed-in quantity for electricity from renewable energy sources is contractually agreed-upon with the power grid operators. In addition, in many countries there are government regulations, such as the EEG in Germany in 2012, according to which the amount of power supplied by facilities must be controllable through a remote control technology. Fulfilling these stipulations requires an efficient controller as a mediator between the inverter and the grid operator.
QTE solution WebVisu/ Web interface/Web service
for example HMI SCADA
Modbus TCP
LAN / WAN Internet
LAN Router
Target values Inverter P, Q, cos φ
Network operator
Modbus TCP
Inverter with analog setpoint preset or Bitmaster setpoint preset
Digital / analog signals Target or actual values
ComBox or remote I/O
QTE controller
P, Q, cos φ Feedback to VNB
QTE feed-in solutions provide the functionality required for this in the form of a compact unit that already meets the standards of tomorrow.
or possibly irradiance sensor
Measuring signals from NEP
Network quality
Analog signals or modbus TCP
Power station 0,4 kV
P [kW]
Main switch 20 kV
During periods of strong solar irradiation a photovoltaic plant with a contractually guaranteed peak feed-in volume 80 kW is able to produce up to 120 kW. The QTE feed-in solution will then autonomously throttle back the output of the plant to 80 kW. During the course of the day the power grid voltage will increase to such a level that the network operator must remotely shut down the plant.
t [h] max. feed-in quantity energy generated excess energy is switched off system is switched off by remote control –4–
QTE feed-in solutions with a self-consumption option – efficient energy management in every situation P [kW]
On a sunny day photovoltaic systems are able to produce electricity to the extent that the power grid operator must switch off the feed. The QTE energy management is able to recognize this situation and within fractions of a second reroute the generated electricity in such a manner that it’s directly usable for own consumption.
t [h] max. feed-in quantity energy generated excess energy is available for the own consumption
Especially photovoltaic and wind power systems can generate more energy peaks on certain days due to weather conditions than they are allowed to according to the contrac tual stipulations. In addition there are remote shutdowns initiated by the power grid operators in order to avoid network overloads. Minimizing the loss of energy and money
in such situations requires the implementation of an efficient energy management. With QTE feed-in solutions these peak outputs are not lost, since they are directly provided to you for your own consumption. Especially for commercial power plant operators this can provide a significant added economical value.
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“Competent, efficient, uncomplicated, very easy to use and therefore highly successful.” Hendrik Zedler, Holzwerk Behringen GmbH
QTE Energy Storages – energy feeding in perfection Equipped with state-of-the-art lithium-ion battery cells, the QTE Energy Storage is the ideal enhancement for solar and wind power plants. Through this, during times of high energy yields and a simultaneous network overload, the power can be stored and subsequently dispersed again when it is required. This enables power plant operators to attain the best possible profits and increase the productivity of their power plants during high price timeslots through a targeted concentration of the power grid feed-in.
During an energy peak in the middle of the day, the power grid operator can switch off the feed-in. The QTE energy management is able to recog nize this situation and within fractions of a second reroute the electricity to the QTE Energy Storage. After the energy peak has ended the QTE energy management will route the stored energy into the power grid again.
P [kW]
t [h] feed-in quantity energy generated excess energy is stored stored energy is fed into the grid feed-in quantity
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QTE controllers for hybrid systems – secured energy supply even without a power grid
A hybrid system consists of a wind turbine, a photovoltaic system and a diesel generator. During periods of strong sunlight irradiation the electricity is generated by the photovoltaic system, and during times of heavy winds the QTE controller system seamlessly switches to the wind-powered generator. If neither one of these sources generates electricity, this task will be assumed by the diesel generator.
In many regions the power grid is only poorly developed or there is no power grid at all. Through a combination of various energy sources such as solar, wind, biomass or diesel generators it is possible to provide a safe and especially economically viable energy supply in these types of areas. QTE controllers can be implemented to control such combination power plants, manage the storage of the excess energy and ensure a constant energy supply, for on-grid as well as for off-grid applications. The compact and reliable controller from QTE will ensure an uninterrupted and independent energy supply even if the energy source is frequently switched.
P [kW]
Energy generated from renewable energy sources Energy from a diesel generator Consumption curve
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t [h]
“The collaboration worked out very smoothly and highly satisfactory.” Ronny Gottschalk, ELEKTRO-Gottschalk GmbH
QTE control devices – reliable hardware for a secure operation QTE Power Plant Controller The Power Plant Controller can be modularly adapted to any number of energy levels and equipped with any imaginable functional feature. It can be incorporated into high-performance systems as well as into systems that require a very complex functionality.
QTE Easy Controller The QTE Easy Controller is the high-performance and flexible solution for the monitoring and controlling of small and mediumsized power plants. Based on proven industry standards and equipped with a web interface, the Easy Controller is able to meet all the requirements of a modern feed-in management in a flexible manner, and it can be utilized for systems up to 200 kW.
QTE Power Plant Controller High-end The QTE Power Plant Controller High-end which is designed for largescale applications and is the optimal controller for large solar and wind parks. It is ideally suited for projects that require an extensive array of functionality combined with a high performance. –8–
QTE remote control technology – smart technology for the Smart Grid Consumer
Flexible decentralized energy generation
Hydropower
Control center
Modern renewable energy producers
Biogas plant
© www.eyevis.com – perfect visual solutions; TransnetBW GmbH
Wind turbine
Photovoltaic system
Combined heat and power plant
The increasing internationalization of markets and the rapid increase in decentralized energy supply systems are also steadily increasing the requirements towards a “smart” power grid. By cross-linking and controlling various energy sources, power generators, power storage facilities, consumers and network resources, the smart power grid (Smart Grid) is able to facilitate a uniform network utilization as well as an energ y and cost-efficient power supply. Although the transition to the Smart Grid requires a more precise monitoring and controlling of the facilities as well as a common language for the smooth communication bet ween the power plants and your power grid control center. The remote control technology from QTE can speak this language and therefore fully satisfy the requirements and perform the tasks which are demanded by state-of-the-art monitoring and controlling technology. Because the proven industrial control components employ the standardized data transmission protocols IEC 60870-5-101 for the serial transmission and IEC 60870-5-104 for TCP / IP-based communication. These signal-oriented protocols are used to exchange messages, measured values, bit patterns, count er values and (setpoint) commands, both with and without a timestamp, safely and in high-quality between your systems and the power grid control center. –9–
“Everything worked perfectly! A high quality work was performed during the project execution regarding the time, quality and technical aspects, which also included the complete programming.” Christoph Lübcke, BLG Project GmbH
InfoCarrier® EnMS – the optimal solution for commercial entities In many countries the legislative authorities are rapidly advancing the energy-policy turnaround with regulations, financial incentives and government programs. Incentives for businesses are linked to the fulfillment of certain con ditions and statutory obligations. For example, in Germany the utilization of tax reliefs is only possible if the imple mentation and use of an energy management system can be evidenced. No later than 2015 any enhanced entitlement for tax reliefs will be subject to a certification according to ISO 50001 or the execution of the respective audits.
To manage their energy requirements, companies need a suitably dimensioned and yet flexible tool that is able to accurately depict their energy profile and offer the appropriate functionality for the optimization of new strategies. The InfoCarrier ® EnMS IT system was developed to precisely target these issues. The InfoCarrier ® EnMS is based on the well-proven and highly integratable manufacturing execution system (MES) InfoCarrier ®. This enables the InfoCarrier ® EnMS to execute rocksolid evaluations, and it is able to link the actual data with the influencing factors of the complete energy profile of the company, thereby facilitating the identification of energy-saving potentials by means of simple analyses. The InfoCarrier ® EnMS is particularly distinguished by its high ease of use and its superior performance.
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QTE – a partner you can rely on
What our customers are saying about us: Project: Large photovoltaic plant for E.ON edis AG in Barth “QTE is able to convince with their The 10.2 MW large-scale power plant functional products and a professional was erected by SolarWorld AG in project execution. The staff members cooperation with QTE in the city of are highly flexible and very helpful.” Barth (Germany). Harry Neumann, Project manager SolarWorld AG • The requirements towards the feed-in management The power grid control center should be enabled to control the inverters of the photovoltaic system using a complex energy management. A particular challenge hereby is the distance of 3 km between the power plant and the grid connection point.
• The QTE solution The intelligent QTE power management enables the power grid control center to optimally communicate with the individual inverters through a PLC controller. The actual value measurement is performed through a remote I / O and an Ethernet connection at the power grid feed-in point located 3 km away.
Project: Photovoltaic system for municipal utility company Idar-Oberstein “The technicians were very friendly A 40 kW powerplant was erected in the and knowledgeable. The cooperation city of Idar-Oberstein, in cooperaleaves nothing to be desired.” tion with the local electrician company Ernst Schumacher, Ernst Schumacher. Owner of Elektro Ernst Schumacher • The requirements towards the feedin management The power plant which is operated on the public power grid is only allowed to feed-in a certain amount of energy. The excess energy that is usually switched off in other photovoltaic systems, is intended to be routed in such a manner that is available for the own consumption.
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• The QTE solution Thanks to the QTE feed-in solution with the self-consumption option, energy is directly routed to feed the own consumption during energy peaks and grid connection switch-off, thus enabling an optimized commercial utilization.
QTE GmbH Warburger Straße 45 34246 Vellmar Germany
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Fon: + 49 (0) 561.50 61 42-10 Fax: + 49 (0) 561.50 61 42-39
www.feed-in.info www.QTE.de
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