Success Stories

Our customers speak best for us, discover their stories and how Ewon improves their business successfully:

Overtech

eWON 4005cd router selected for surveillance system of large-scale photovoltaic plant

eWON router has been selected for the surveillance system of one of the largest photovoltaic plants currently in operation in Italy, built near Cremona by Overtech, a specialist company with over ten years of experience in the solar energy sector, designing large-scale installations based on particular architectonic requirements.
Flexibility is a key characteristic of all the eWON equipment: compatibility with all the automation products combined with the extreme flexibility in industrial communication
Massimo Rebernig
OverTech

eWON router has been selected for the surveillance system of one of the largest photovoltaic plants currently in operation in Italy, built near Cremona by Overtech, a specialist company with over ten years of experience in the solar energy sector, designing large-scale installations based on particular architectonic requirements.

Acting for the account of Linea Energia, from the LGH group, which is a national utility company producing and distributing energy - 98% from renewable sources-, the plant was designed and installed by Overtech using its own technicians. Upon the accomplishment of the installation, the next step was the design and installation of the surveillance system, built on the order of Overtech by Massimo Rebernig, a self-employed engineer with many years of experiment in the field of surveillance and control, particularly, in energy production.

« The company’s principal requirement was being able to manage and supervise the plant using a common browser like Internet Explorer, without having to install any other software », Rebernig explains.

« When I went to work, a great many decisions were still open. At the end client, the organization and division of the tasks for the management and maintenance were still underway. For this reason, it became necessary to develop a surveillance providing a wide range of flexibility as to future developments.

For this reason, one of the criteria in the choice of device dedicated to surveillance was system scalability. With precisely this in mind, the eWON device was found to be the ideal solution for concrete flexibility.»

Data manager


Any large-scale photovoltaic plant surveillance system must monitor large quantities of critical and complex data, the specifics of which differ from those encountered in other energy production installations. The eWON equipment gathers and reprocesses the data permitting installation surveillance, and also manages synoptic graphics, data logging and trending.

"Flexibility is a key characteristic of all the eWON equipment: compatibility with all the automation products combined with the extreme flexibility in industrial communication"

Remote programming, trouble shooting and monitoring

The monitored data are then displayed over the Internet using a common browser, accessing a web server embedded into the eWON router itself, which houses an integrated, but straightforward, flexible and powerful SCADA synoptics. The synoptics is an option of the cutting-edge model of all eWON equipment, the 4005CD.

"This optimal functionality has turned out very well, since it has permitted us to cut the costs of a dedicated software package.The operators are linked by remote control via secure VPN connections; this means that only authorised positions are linked with the eWON equipment. This characteristic is extremely advantageous in terms of data security", Rebernig stresses.

"Of course, all the standard levels of protection are provided, with password and user identification."

Customised functionality


On request or permanently, eWON makes a secure, VPN connection to the Talk2M web server. On the other side, the user also makes a secure VPN connection to the same server, by signing in to the Talk2M service. This server interconnects the two VPN tunnels. Only authenticated users can connect to their eWON routers. Once a user is connected using ‘eCatcher’ and signed in, a single click is all that is needed to establish communication with the chosen remote site.

Connecting to a remote location via mobile phone networks is just as straightforward. An eWON router containing an embedded GPRS or EDGE modem can either be permanently connected to Talk2M or can be remotely activated to establish a Talk2M VPN session, by sending it a SMS text message.

The plant entered into operation in December 2008. For Linea Energia, it was an innovative choice, a challenge for the future. The surveillance system was finalised and put into service in early 2009.

Benefits

  • Manage the plants in means of a simple browser
  • Provide flexibility for future developments
  • Monitor large quantities of critical and complex data easily