智能变电站中过程层和间隔层功能一体化IED的设计

常规变电站的智能化改造需要增加过程层设备并改造间隔层设备,施工复杂,对中低电压等级间隔经济性欠佳。提出了采用过程层和间隔层功能一体化智能电子设备（IED）的分散安装配置方案,并设计了功能一体化的新型IED,将合并单元、智能终端功能和测控、保护功能在一台物理设备中实现。介绍了该IED的总体设计方案和软硬件结构,主要由Po...

Design of IED with Integrated Functions of Process Level and Bay Level in Intelligent Substation

The intelligent reconstruction of conventional substation needs to add process level device and to reconstruct bay level device so that causes complicated working and uneconomic for medium and low voltage bay.A distributed configuration scheme of secondary devices using intelligent electronic device(IED) with integrated functions for process level and bay level is presented.Based on the new scheme,a new type of integrated IED is designed,which completely implements merging-unit,intelligent-terminal,measurement-control and protection functions in one physical apparatus.The integrated design scheme and software-hardware architecture of the integrated IED is described,which is composed of four dominating parts: PowerPC main processor modular,digital signal processor(DSP) data processing module,field-programmable gate array(FPGA) integrated processing module and breaker intelligent control module.Several related issues are discussed in detail,including the design of sampled value data stream,rapid processing of generic object oriented substation event(GOOSE) and the design of measurement-control and protection function.Finally,the information model of the integrated IED is established according to IEC 61850 standard.In conclusion,the integrated IED,which is cost effective with reasonable design and superior performance,can effectively simplify the intelligent reconstruction of conventional medium and low voltage substations.