Advantech’s intelligent PV plant monitoring system is a visual, manageable and controllable solution which can integrate scattered PV stations to provide aggregated data and unified management platform to achieve real-time control and improve the overall effectiveness of maintenance and operation management in PV plants.
And because it would be installed outside on the roofs of buildings, the wireless system had certain requirements. One of which was that they had to cope with the extremes of temperature where it can drop to as low as minus ten in winter and plus 40 in the summer. For security purposes surveillance cameras would also be installed and having sufficient network bandwidth to transmit the PV and video data was also necessary.
In order to avoid excessive bandwidth consumption when bridging Access Points (AP) and considering both deployment cost savings and system expandability, detailed network architecture planning was necessary to ensure the wireless network system would provide stable transmission and meet future expansion needs.
To meet these requirements, Advantech utilized two EKI products to build a Mesh backbone network with multiple wireless AP nodes, so as to meet customer’s requirements of rapid implementation, stable transmission and cost savings. The backbone base station used the EKI-6340-3which has received a Chinese Innovation Award to provide excellent expansibility and flexibility for users to deploy an optimized wireless network system. Among its many functions, the three radio interfaces enable the wireless interconnection of APs throughout various plants. Providing redundancy and setting up a link in the 5.8GHz band also enhanced the stability of network operations.
By leveraging the advanced industrial Mesh technology, this industrial-grade wireless AP features self-healing and self-forming capabilities allowing the wireless network to extend communication range according to various application conditions and having the failure recovery within 20 ms to ensure the smooth transmission of data. Because the EKI-6340 supports 802.11n 2x2 MIMO, it guarantees transmission quality for both general and video data at a higher bandwidth with faster speed (maximum 300Mbps).
Also included in the network was a series of affordable and feature-rich EKI-6331AN industrial wireless APs. Through its embedded 16DdBi 5.8GHz dual-polarization (MIMO) directional antenna it directly connects to the backbone base station, and saves the implementation costs of additional antennas and feeders. Like the aforementioned wireless EKI-6340, the EKI-6331AN also supports 802.11n 2x2 MIMO giving it a three times faster data transfer rate compared to 802.11a devices. To strengthen the wireless network data security, it implements the latest encryption technologies including WPA2/WPA/802.1x to protect the data of the PV system.
Because of the location’s severe weather, the EKI devices were chosen for their international IP waterproof and dustproof certification, thereby giving users the assurance that they operate whether it is bitter cold or blazing hot.
In addition to its own products, Advantech used its expertise to supply accessories from long-term partners, including directional antenna, sector antenna, splitters, feeder lightning arrestermodule and network lightning protection module to secure the outdoor wireless devices against wind and lightning while ensuring uninterrupted communication quality.
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