4. 结语
以FPGA为核心实现继电保护装置,将CPU、DSP架构下的“运算能力天花板”抬升到了前所未有的高度,为各种新算法的开发、实现提供了坚实的基础。采取“以硬件资源换性能”的策略提高保护装置的性能,需要各方面技术人员的通力协作,尤其需要保护算法设计师在设计理念上进行一定程度的调整,需要电力系统故障分析师、保护算法设计师、FPGA应用研发设计师、PCB设计师密切配合,甚至可能需要借鉴大型机系统架构设计师的经验,需要多方协作进行大量的理论探索、算法研究、实践验证,不可能一蹴而就。这个过程尽管困难重重、成本高昂,但其率先成功实施者的产品将在性能上取得显著的优势。
同时,实践“以硬件资源换性能”的策略,将不可避免地增加FPGA芯片的成本。对此,笔者认为:首先,鉴于继电保护装置在电力系统中所起的重要作用,相对于其性能提升所带来的经济效益、社会效益来说,几千元、上万元的芯片成本应该是可以考虑的;其次,在进行FPGA应用研发过程中,可以采取各种技术手段以尽可能控制硬件资源占用量;最后,这样的成本是否物有所值,应该由用户、市场做出最终的仲裁。
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感谢:在此特别感谢我的同事魏欣先生,他在我构思此方案时提供了重要的继电保护专业知识,补充了我在这方面的不足,为本文成稿提供了重要帮助。
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英文标题及摘要:
The on-chip system architecture and algorithm’s implementing method of digital protection device based on FPGA
Abstract: Implementing digital protection algorithm based on FPGA, using massive distributed calculating-resource provided by FPGA, dividing process of data processing by means of pipeline and letting every grade and every kind of algorithms working as parallel as possible, all these provide digital protection algorithm engineers with more ability of calculation, let them never limited by running time of CPU or DSP which is available, provide them with ability of organizing existing algorithms as reasonable as possible. It also provides them with method of “more hardware resource and better performance” and possibility of developing digital protection algorithm with more comprehensive performance in a new way. An on-chip system architecture of digital protection device based on FPGA is illustrated. An algorithm implementing method of digital protection device based on FPGA is also illustrated. These works provide improvement of digital protection device now and development of new digital protection algorithm with reference.
Key words: digital protection; FPGA; algorithm of digital protection; intelligent substation |