Power Station Synchronized Monitoring System Based On Ethernet Network

With the using of much more advanced technique of transducer, network communication equipment, modern power station microprocessor-based monitoring system is developed from primary SCADA system to Wide Area Measurement System which its functions spread into state estimation, dynamic stability monitoring, faults analyzing etc fields.A microprocessor-based synchronized monitoring system is buildup by three part hypogyny data sampling system, epigyny data serving system and background monitoring system in this paper. Background monitoring system is composed of YanHua industry control machine and PCI based data boards which guarantees the sampling data reliability and implements the real time pharos calculation. The communication protocols with answering mechanism are adopted to ensure the high communication reliability between hypogyny computer and epigyny data server. A common and expandable DCOM interface is designed by using the distributed Component Object Model technique which provides the data interface for the data server and background monitoring system and other online analysis systems. Every device such as generator, transformer, load, transmission line and etc are constructed by fundamental metafile in the background monitoring system. Real-time and history database are build to offer data support for the dynamic curve displaying, history signal and controlling record storing management, reports forms printing, off-line data analyzing and etc.The synchronized phasors are used for generator quasi-synchronize paralleling in this paper. The phasor measurement algorithm based on the compositive phasor of three phases and a forecasting model based on the subsection constant acceleration of slip frequency is proposed. The simulation results show that the better performance is achieved in fasting paralleling and reducing concussion compare to the traditional single phase measurements and forecasting models.