High performance distributed power quality monitoring IED used in smart grid

With the development of Chinese smart grid, power quality problem becomes more and more serious, and it is most urgent to establish a large-scale management system which can real-time monitor multi-node power quality of power generation, transmission and distribution aspects. Power quality monitoring IED based on the design of IEC61850 standard for substation automation system can unify device external port, effectively solve interoperability problem of different devices, and greatly simplify the architecture design and communication network of large-scale power quality management system. This article develops a high-performance distributed power quality monitoring IED based on I EC6 1850 standard. The IED is composed by three cores high-performance PowerPC, D S P and FPGA. So it can realize high-speed acquisition, real-time processing and analysis of huge amounts of data. It supports both high-speed analog sampling and digital sampling that means the IED can receive IEC61850-9-2 packets through SV module. The SV and CPU modules exchange real-time data via high-speed LVDS bus on the backplane. The monitoring IED can be installed on any monitoring node as its distributed architecture design. Through MMS service the remote monitoring center collects power quality data of all monitoring nodes, according to the data analysis, completes the funtions of power quality disturbance identification, power quality disturbance source localization, power quality assessment, etc.