The Desigh Of Protection And Control Platform In Intelligent Substation

In the construction of smart grid,characterized in digital and intelligent,smart substation has been booming and rapidly growing popularity.The digitization of information in the whole substation,networking of the communication platform,standardization of the information sharing,it requires a lot of corresponding protection and control products.Before the development of new products,we must develop platform technology which adapts the product first.So,the development of more appropriate intelligent protection control platform is very necessary and feasible.Firstly,this thesis analyzes function and performance requirements of the protection and control devices used in smart substatio,and as a basis for design of distributed intelligent board system.The intelligent board held together by high-speed buses effectively.Smart Board is compatible with conventional substation and application of intelligent substation protection and measuring control equipment,and it makes the hardware system simple and reliable.According to the functional requirements and performance requirements of protection and control devices,we select the dual-core processor OMAP-L138 as the core processor platform design.Because of the choice of dual-core CPU with DSP+MCU structure,two different functions can be integrated in one Board,and so,the system design is much more cleaner.Then,we discusses in depth the problem of the CPU boards’ working mode,and the problems of peripheral with safe and efficient access.Dual-core processor is selected for this article,so we should focus on the CPU running mode and security system design in dual-core cooperation mode.The thesis discusses on the peripheral access mechanisms with dual-core processor to avoid data conflicts,and to increase the system efficiency.By the rational division of tasks and processes optimization,heterogeneous dual-core system is realized efficiently.This work gives full play to the performance advantages of dual-core processors.Other than that,The thesis propose a system efficiency improvement measures such as DMA,coprocessor.It will release the CPU performance,and it is desired to meet the high real-time requirements of the application.Multi-Boards designed for this system,data exchange and synchronization between the boards was discussed in-depth.Real-time high-speed LVDS bus and RS-485 bus combines technology make the performance of data exchange between boards very outstanding.LVDS bus can achieve the real-time interaction of large amounts data,and the RS-485 bus can achieve the real-time interaction of small data amounts.For the higher security requirements,dual bus check mechanism was designed.With various bus,the platform combines real-time,high-speed,low power consumption and high reliability characteristics.Finally,on the basis of platform system design,we select the appropriate function boards to form an intelligent power transformer protection.The software systems of the device based on the software platform we designed in this thesis,and the usage of standard components improve compatibility between software systems.The protection and control platform we designed in this thesis was proved to have excellent performance,and can compatibility with the applications in legacy substations and smart substation.Use the platform we designed can efficiently research and design of intelligent protection control device.Meanwhile,the platform considers more demand improvements possible in the future.