基于SmartPLC的馈线终端单元设计

Design of feeder terminal unit based on SmartPLC

为配合电网改造,研制了应用于10 kV电压等级,集检测和继电保护于一体的馈线终端单元(FTU),该设备采用双CPU的体系结构,由数字信号处理芯片TMS320F2812、嵌入式工业芯片组EP9302、复杂可编程逻辑器件(CPLD)、双口RAM等先进硬件组成,提高了硬件平台的可复用性和可配置性;以软件模块化设计和灵活组态思想为指导,在核心处理器DSP中嵌入SmartPLC,把系统划分为四大功能块,各个功能块可以灵活配置,设置为不同的任务类型和优先级,充分利用系统资源,增强装置性能,更好地适应配电系统的灵活多样性。

In order to cooperate with the alteration of distribution network, a kind of feeder terminal unit （FTU） was designed, which involves measurement and relay protection applied to voltage level of 10 kV. This equipment adopts double CPU, which consists of digital signal processor TMS320F2812, embedded industrial module EP9302, CPLD （complex programmable logic device ）, dual-port RAM and other advanced chips, the repetitious and re-confignrable hardware platform design of FTU is improved. In the direction of software modularization and flexible configuration technologies, SmartPLC is embedded in the core processor DSP, it divides the system into 4 modules, every module can be flexibly configured and setup different task types and priority, so as it fully utilizes the system resource, enhances the performance of FTU and better meets the flexible multiplicity of the distribution system.