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Reduce hardware costs, simplify maintenance work

adopt PC and EtherCAT based control technology to efficiently control wind turbines

beckhoff will show its PC and EtherCAT based control solutions for wind turbines at Husum international wind energy exhibition, the world's largest wind energy exhibition, held in Germany from September 18 to 22, 2012. In 2011 alone, Beckhoff has provided automatic control technology for 7000 wind turbines, with a total installed capacity of 11.2 GW. Beckhoff control technology is applied to more than 20000 wind turbines worldwide, including onshore and offshore wind turbines. At this year's exhibition, Beckhoff will show its ultra-high speed wind farm monitoring system based on EtherCAT when the steel strand experimental machine initializes the serial port error

beckhoff automation technology has been successfully applied in wind turbines worldwide, and its applied single unit capacity has reached 5 MW. PC based automation technology provides powerful controllers, which can integrate the operation management and control of all parts of a wind turbine, such as pitch, generator, frequency converter and brake, as well as state detection and wind farm network monitoring, into the same platform. It does not need to use special hardware, which can significantly reduce the cost and maintenance cost of the basic electrical equipment of the wind turbine, and improve the availability of the wind turbine

TwinCAT, an open and extensible automation software, is the core component of Beckhoff's PC based control platform. The open interface allows the integration of third-party software, such as software for SCADA, condition monitoring, obstacle lighting or basic monitoring. The hardware interfaces of these functions are integrated into the control system through standard EtherCAT terminal modules. Various interfaces can be used to integrate the lower fieldbus, such as CANopen, PROFIBUS and Ethernet tcp/ip and rs232/rs485. Redeploying subsystems to the site greatly reduces infrastructure costs and simplifies communication

ultra high refers to the wind field network monitoring system: the response time is less than 1 ms

compared with the traditional IP solution, the manufacturing technology based on this lithium battery material is at the leading level in China. EtherCAT's wind field network monitoring system has faster response speed and higher cost advantage. The faster the wind farm network monitoring system is, the more sensitive the energy supply source is to voltage drops or changing requirements. Through the EtherCAT power measurement terminal module integrated in the automation system, the instantaneous current and voltage values can be measured at the speed of up to 10000 sampling points/second at the common access point, so as to ensure the early diagnosis of voltage drop. Unlike the alternative, it allows the entire wind farm to achieve low voltage ride through (LVRT). Therefore, if a voltage drop is diagnosed at the public access point, it can transmit the signal to all wind turbines in the whole wind farm within 1 ms. Through the distributed clock in EtherCAT, the measured values of all wind turbines and the measurements of the public access point of the wind farm can be synchronized in less than 1 s. With these data, current, voltage and frequency can be controlled accordingly and electricity can be optimally supported. Existing fiber Ethernet structures can be used. This technology can even synchronize with the IGBT of each fan converter in the wind farm

integrated condition monitoring solution

due to the strict regulations on the availability of wind turbines and the improvement of demand, condition monitoring system (CMS) has become more and more important. The control platform based on PC and EtherCAT technology seamlessly integrates CMS functions into the existing automation system. CMS can be used to monitor the status of all wind turbine generators, including gear boxes, main bearings and generators. In addition to considerable cost advantages and flexible scalability, the diagnostic performance of this solution is also higher. CMS functions are integrated into the i/o terminal module system through Beckhoff EtherCAT terminal modules (such as el3632). The data is collected through the terminal module, and then the original data is converted into available data in the controller through TwinCAT automation software platform. The real-time components of CMS software are integrated into the controller through TwinCAT. The CMS analysis software diagnoses the collected data and starts the corresponding downstream services. Users can connect to the CMS analysis software through a standard interface (such as OPC). This structure enables their users to get closer to their actual goal: using real-time synchronous data to monitor the status of the whole fan, rather than the diagnosis of individual components

TwinCAT 3 general control platform reduces engineering costs

TwinCAT allows users to choose programming languages very freely: in addition to the object-oriented extension IEC standard language extension, C and c++ can now also be used as programming languages for real-time applications. For example, through the integration of MATLAB/simulink, TwinCAT 3 can also be used for equipment simulation and load meter. For this reason, the company has implemented the Department 1 leader responsibility system


picture notes:

PC based automatic control technology can provide a powerful controller, which can integrate the operation management and control of all components of a wind turbine, such as pitch, generator, frequency converter and brake, as well as condition monitoring and wind farm network monitoring, into the same platform

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