Monitoring - the WebWPS SCADA System
Based on comprehensive web technologies
The Siemens WebWPS SCADA system is based on comprehensive web technologies, including XML, XSL style sheets, Microsoft Internet Information Server (IIS) and ASP. With its flexible architecture, the system is fairly easy to adapt to project-specific requirements, customized data and report formats. The web server on site generates reports and stores historical data and remote terminals can be connected via modem, routers or an Ethernet network.
Communication Network
On site, the SCADA system and the wind turbines are linked with an internal communication network using optical fiber cables (preferably single-mode). Depending on the site layout, the network is split into loops each consisting of 8 to 10 turbines.
WebWPS Software
The main component of the WebWPS software is installed on the site server.
It has three distinct parts:
- The communication driver controls the site network. It is fully configurable and can be set up to handle any project-specific combination of turbines, net masts, grid monitoring stations, etc.
- The database management system that also generates the reports is based on Microsoft ActiveX® Data Objects (ADO). The report generation engine offers customized reports as well as a number of predefined reports with setup based on typical wind farm operator requirements.
- The web server delivers information such as reports and real-time data mostly based on XML and XSL style sheets. It can be expanded easily to provide project-specific pages.
Status Views
A detailed view of a specific turbine will typically present the following data:
- Wind turbine data: Wind speed, active and reactive power, yaw angle, etc. and command, operational and fault status
- Electrical and mechanical data: 3 phases and current voltage, power factor, frequency, rotational speeds (generator and rotor RPM), temperatures of gear oil, generator, nacelle, etc.
- Statistical data: Total and subtotal turbine statistics such as availability, external errors hours, calendar hours, etc.
- Meteorological data: Wind speed and direction, air pressure, temperature, mean wind speed and any other project-specific data
- Grid data: 3 phases and current voltage, active and reactive power and any project-specific data
Reports
The WebWPS SCADA system provides both standardized and customized reports. All of them can be easily exported to Excel allowing quick analysis of these reports within customer organization. Some of the "standards" include:
- Browsing and filtering (date, station, alarm codes, etc.) and historical data
- Daily, weekly and monthly reports on turbine performance, meterological and grid data