Traditional automation and power measurement technologies are becoming more and more integrated. Beckhoff integrates the latest EL3783 power monitoring oversampling terminal module into a standard control system, enabling high-precision grid analysis to now be used in power generation systems. The most important thing is that for the three-phase AC system with voltage less than 690V, the synchronous analysis of three-phase voltage and three-phase current can be realized directly in the PLC, and the sampling frequency of the analysis data is up to 20k per second.
Beckhoff's EtherCAT Terminal Module EL3783 measures the instantaneous value of each of the three phases, measuring voltages up to 400/690 Vrms, measuring currents of 1 or 5 Arms, and resolution of 16 bits. The module measures six channels simultaneously based on the EtherCAT oversampling principle with a time resolution of up to 50 μs, significantly faster than the controller's duty cycle. With the EtherCAT Distributed Clocking feature, it is also possible to synchronize measurements with other EtherCAT devices in the system and accurately detect grid cascading failures, no matter how large the system is.
The control system can also provide detailed data with relevant details. For example, if you use the true RMS value for performance calculations when analyzing power and current curves, or if you use a specific algorithm, you need these details. In addition, the EtherCAT terminal module EL3783 has automatic current range switching function, which can achieve 650% of the range of 1A signal, and the measurement accuracy is high, the maximum error is only 0.2% (full scale value).
The EL3783 terminal module can be used with the TwinCAT 3 Power Monitoring Software Library TF3650 to form a highly dynamic measurement system integrated into a standard PC control system for detailed grid analysis. This will determine which grid measures should be taken for voltage dips (low voltage ride through), for example, harmonic analysis can be used to achieve condition monitoring without the additional cost of accelerating the sensor.
Beckhoff's EL3783 Power Monitoring Oversampling Terminal Module provides detailed current and voltage values ​​for three-phase power grids up to 690 V AC while meeting the stringent requirements of wind turbine applications.
About Germany Beckhoff
The headquarters of Beckhoff Automation GmbH is located in Weil, Germany. The company has branches all over the world, plus global partners, the company's business has now spread to more than 70 countries and regions.
Beckhoff always takes PC-based automation as its development concept. The industrial PC, fieldbus module, drive products and TwinCAT automation software form a complete and compatible control system for each industrial control field. Provide open automation systems and complete solutions. For more than 30 years, Beckhoff's component and system solutions have been used worldwide. In March 2001, Beckhoff established the first representative office in China in Beijing. In May 2007, Beckhoff established a wholly-owned company in Shanghai and moved its headquarters in China to Shanghai. Since then, the company's business has entered a period of rapid development. At present, it has set up offices in 25 large and medium-sized cities in Beijing, Guangzhou, Chengdu, Wuhan and Nanjing. With the continuous entry of many new products and technologies with good cost performance into the Chinese market, the company has been brave enough to break the traditional control mode, and the concept of promoting PC control technology has been accepted by more and more Chinese users.
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