本文選題：嵌入式系統(tǒng) + 實時多任務操作系統(tǒng)��； 參考：《山東大學》2012年碩士論文

【摘要】：電力系統(tǒng)保護測控裝置是保證電網安全穩(wěn)定運行的重要基礎設備,智能電網的建設對裝置的性能提出了越來越高的要求,針對目前該領域中存在的不足,采用先進的嵌入式軟硬件技術,開發(fā)了平臺化的新型保護測控裝置。 裝置硬件平臺采用MCU(Micro Control Unit)+DSP(Digital Signal Processor)的雙處理器架構,MCU模塊完成管理和通信功能,采用浮點DSP作為數(shù)據(jù)協(xié)處理器,完成相量計算、保護邏輯等功能,MCU與DSP之間通過HPI(Hardware Platform Interface)接口進行數(shù)據(jù)交互。闡述了主處理器模塊的功能設計以及交流模擬量采集,溫度量采集,數(shù)字量輸入輸出,液晶顯示和以太網通信接口等關鍵模塊的硬件電路設計。 以VxWorks實時多任務操作系統(tǒng)為軟件平臺,設計了軟件總體架構。按照功能分層的軟件設計方法,開發(fā)了基于AX88796芯片的網絡驅動程序,為適應保護測控功能快速啟動要求,修改了VxWorks的網絡設備加載順序,將END(Enhanced Network Driver)驅動的加載、啟動從系統(tǒng)啟動過程中獨立出來。設計了以鏈表結構為基礎的菜單顯示界面,封裝了基于RA8835A控制器的液晶模塊驅動程序,易于實現(xiàn)液晶模塊的更換和升級。開發(fā)了FLASH啟動模式下的DSP二級Bootloader功能,根據(jù)應用需求和硬件配置編寫了lnk.cmd文件。采用了調用TMS320C6713浮點庫函數(shù)的方法,提高了數(shù)字信號處理算法的效率。 根據(jù)保護測控功能需求,將中斷、任務資源進行了合理分配。研究了各種電氣量計算方法的原理和性能,包括全周積分算法,全周傅里葉算法和快速開方算法。針對數(shù)字量輸入易誤報和漏報的問題,改進了軟件去抖的處理策略,增加了狀態(tài)判斷次數(shù)和延時確認判據(jù)。 最后介紹了裝置性能型式試驗的一些測試結果,經第三方檢測機構檢測,裝置整體性能完全滿足國家標準和行業(yè)標準的要求,達到了預期設計目標。
[Abstract]:Power system protection measurement and control device is an important basic equipment to ensure the safe and stable operation of power network. The construction of smart grid has put forward more and more high requirements for the performance of the device. Based on the advanced embedded software and hardware technology, a new type of protection measurement and control device based on platform is developed. The hardware platform uses MCU(Micro Control Unit DSP(Digital Signal Processor-based dual-processor architecture to complete management and communication functions, and floating-point DSP is used as data coprocessor to complete phasor calculation. Protection logic and other functions between MCUs and DSP through the HPI(Hardware Platform interface for data interaction. The function design of the main processor module and the hardware circuit design of the key modules, such as AC analog data acquisition, temperature acquisition, digital input and output, liquid crystal display and Ethernet communication interface, are described. The software architecture is designed based on VxWorks real-time multi-task operating system. According to the software design method of function stratification, the network driver program based on AX88796 chip is developed. In order to meet the requirement of fast start of protection measurement and control function, the loading sequence of VxWorks network device is modified, and the END(Enhanced Network driver is loaded. Boot is independent of the system boot process. The menu display interface based on the linked list structure is designed and the LCD module driver based on RA8835A controller is encapsulated. It is easy to replace and upgrade the LCD module. The second level Bootloader function of DSP in FLASH startup mode is developed, and the lnk.cmd file is written according to the application requirements and hardware configuration. The efficiency of digital signal processing algorithm is improved by calling TMS320C6713 floating point library function. According to the protection measurement and control function requirement, will interrupt, the task resource has carried on the reasonable allocation. The principle and performance of various electrical calculation methods are studied, including the whole cycle integral algorithm, the full cycle Fourier algorithm and the fast square algorithm. In order to solve the problem that digital input is prone to false positives and false positives, this paper improves the handling strategy of software shake removal, and increases the number of state judgment and the criterion of delay confirmation. Finally, some test results of the performance type test of the device are introduced. The overall performance of the device fully meets the requirements of the national standard and the industry standard, and achieves the expected design goal.
【學位授予單位】：山東大學
【學位級別】：碩士
【學位授予年份】：2012
【分類號】：TM76;TP368.12

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