CRES
Laboratory for Wind Turbine Testing - List of provided services
Abstract: This
leaflet introduces the Laboratory for Wind Turbine Testing of CRES.
It provides information about its scope and structure and presents
a technical outline of of the provided services: Power
Performance, Power quality, Load measurements, Noise measurements,
Anemometer calibration, Wind potential assessment.
Οι ανεμογεννήτριες στις Ελληνικές ανεμολογικές συνθήκες.
Περίληψη: Η χώρα μας χαρακτηρίζεται από το έντονο ανάγλυφο της, το οποίο
επιδρά σημαντικά στη διαμόρφωση των τοπικών ανεμολογικών συνθηκών που
έχει να
αντιμετωπίσει μια ανεμογεννήτρια (Α/Γ) στη διάρκεια της ζωής της.
Οι ανεμολογικές αυτές συνθήκες επηρεάζουν τόσο την ενεργειακή απόδοση
μιας
αιολικής εγκατάστασης όσο και τα χαρακτηριστικά φόρτισης της, ακραία
και κοπωτικά. Στο άρθρο αυτό παρουσιάζεται συνοπτικά η σχετική
εμπειρία και γνώση που αποκτήθηκε στο ΚΑΠΕ μέσω της συστηματικής συμμετοχής
του
σε μια σειρά Ευρωπαϊκών έργων με αντικείμενο τις Ανεμογεννήτριες
στη Σύνθετη Τοπογραφία.
Power
Quality measurements on different types of wind turbines operating
in the same Wind Farm.
Abstract: CRES
has developed a dedicated measuring system to comply with the IEC recommended
practices for power quality measurements. In addition, since early
in the year 2000, CRES operates its own 3.01 MW demonstration wind
farm where the aforementioned practices can be implemented and verified.
This study aims to reach readily comparable results from four different
types of wind turbines operating in this wind farm, with a view to
their power quality characteristics. For this purpose, a typical set
of measurements is performed for each wind turbine, and a common evaluation
method is applied, the whole approach being conducted according to
the currently valid IEC standard. In this study, the measurement procedure
is described in detail and the most indicative results are presented.
Use
of cellular telephony technologies (WAP, SMS) to remotely monitor
and control wind turbine operation
Abstract: Remote
controlling and monitoring wind turbines is generally done using
conventional telephony and custom made programs. Nowadays, new
devices appear (mobile telephones supporting WAP protocol, handheld
PCs) offering the possibility to be instantly and more efficiently
informed, when running critical applications. Moreover, hundreds
lines of code can be saved, using a WAP browser, as a communication
interface. This paper presents how cellular telephony technologies,
like the Short Messages Services (SMS) and the Wireless Application
Protocol (WAP), are implemented in the control and monitoring software
of a wind farm operation.
Experimental
investigation of Complex terrain Boundary Layer with a 100m Mast.
Abstract: The
experimental investigation of the boundary layer characteristics
at a complex terrain site is performed by the extensive instrumentation
and operation of a 100meter mast located at CRES test station at
Lavrio. The experimental setup supports wind and meteorological
magnitude measurements. The initial data analysis is focused on
the description of the basic deterministic and stochastic parameters
and their dependency with height. The results comprise a valuable
tool for setting the design envelope for wind energy applications
in complex terrain.
Έλεγχος
και παρακολούθηση λειτουργίας Αιολικού Πάρκου με κινητή τηλεφωνία
(μηνύματα SMS, WAP) και Internet (web-site, e-mail).
Περίληψη: Στο
άρθρο αυτό παρουσιάζεται η υλοποίηση της παρακολούθησης της λειτουργίας
(remote monitoring) και του εξ’ αποστάσεως
ελέγχου (remote control) ενός Αιολικού Πάρκου με διαφορετικές Α/Γ.
Η επικοινωνία γίνεται με τον ελεγκτή (controller) της
κάθε Α/Γ, καθώς και τον κεντρικό διακόπτη
του Α/Π, με ξεχωριστό
ανά περίπτωση τρόπο (πρωτόκολλα: Jbus/Modbus, RS-232/485,
VMP). Τα στατιστικά αποτελέσματα καθώς και τα λεπτομερή,
ανά δευτερόλεπτο, δεδομένα του τελευταίου 10λεπτου (online data) διατίθενται
για την
παρακολούθηση της λειτουργίας του Α/Π μέσω internet και κινητής τηλεφωνίας.
Integrated Wind-Hydrogen Systems for Wind Parks.
Abstract: Hydrogen is presented as a product from wind parks, complementary to electricity. An innovative wind-hydrogen system has been designed and constructed at the wind park of the Centre for Renewable Energy Sources (CRES), near Athens, Greece. A 500 kW gearless, synchronous, multipole Enercon E40 wind turbine supplies power to a water electrolyser of 25 kW, a hydrogen compressor of 7.5 kW, and other electrical utilities. The individual components and the system as a whole have been commissioned with success, and the operation of the plant has already supplied very interesting results regarding the performance of such a wind-hydrogen system. The preliminary results show that the overall efficiency of the system, from the AC power supplied by the wind turbine to the high heating value of the hydrogen produced and compressed at 220 bar, is approximately 50%..