Produit en France - breveté EOLYS
 
OUR TECHNOLOGICAL CHOICES
EOLYS' Wind Turbines are top-of-the-range machines.
Many years of research & development allowed EOLYS to tune a unique, patented technology, the SAS Control.
This technology allows our machines to achieve better performances than our competitors using the traditional pitch control systems, minimizing at the same time O&M and downtime.
An exceptional profitability is the result of the combination of very high performances and extremely low maintenance.

You will find more details on our patented technology hereafter.
SMART ACTIVE STALL CONTROL
 
SMART ACTIVE STALL CONTROL
The SASC is radically different from all technologies applied today in the wind industry (be it pitch or stall controlled machines), thanks to the use of a whole array of highly performing devices and state of the art technology :

Eolys SMART ACTIVE STALL CONTROL
Optimised Performances

The rotor speed set point is adjusted depending on the conditions to run between stall limitation up to optimises power thanks to :

A frequency inverter that allows speed and torque control
Self adapting algorythms, adjustable by the environmental and functional conditions
An electromagnetic braking system, that absorbs above-rated-power energy caused by eventual blasts.

It is therefore possible to produce at the rated power even in case of strong wind, as illustrated in the screeshots on the right.
Eolys SMART ACTIVE STALL CONTROL Performances
Safety in all functioning modes

A set of safety devices assure that the machine can always be stopped, no matter the enviromental conditions:

Parameters and measurement evaluation:

The rotor speed is continually measured by two sets of sensors and a safety PLC. One sensor' signal loss, a measurement discordance, or an aprochaing overspeed entail a safety stop of the machine.
A resolver is used as a third device and driven by the PLC and by the frequency inverter. That makes 3 indipendent controllers, each of which can spark a safety stop.
The electromagnetic brake is controlled by the safety PLC and the main PLC. Any discordance implies a safety stop.
The safety PLC controls the halt of the machine and selects the appropriate braking device depending on the rotor speed and running conditions.


Redundancy of braking systems

The electromagnetic brake is capable, on its own, to bring the machine to a halt with as little power as less than 5% of the rated power of the machine.

Redundancy is assured on the electromagnetic brake: it is composed by two indipendent electromagnetic coils: one for normal operation and speed control, and one for safety stop.
In case of mains loss, the generator energy is feed back to the retarder ensuring high braking torque.
Braking resistors are used as a second braking device.
An emergency mechanical friction brake is used as ultimate stop. In case of failure of one of the above mentioned braking systems, this brake assures the turbine's halt, managed by the safety PLC.



A reduced O&M

The frictionless main braking system converts the rotor energy into heat.
A stall-controlled machine means no maintenance on the pitch system and reduces the number of mechanical parts.
The emergency brake is used only at extremely low rotor speed. Its ware and tare is therefore limited and measured by a sensor.
No slip ring.
A remote controlled server and database, along with a whole array of sensors make predictive maintenance possible.
A secure derated functionning mode is possible in case of failure of a machine's sensors using nearby machines' sensors.




EOLYS' technology is also :

User friendly and programmable IHM.
An open source programming language.
A web server, a ftp server and several communication protocols (CAN, Modbus TCP or RTU, IP data exchange), e-mail or text messages.



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