基于dsp的电力系统微机继电保护的分析与设计word格式论文.docxVIP

摘要近年来我国国民经济迅速发展，人民的生活水平也逐渐提高，与此同时人们对电力 的依赖性也进一步提高，因此近些年来电力系统的规模不断扩大，高压电网迅速发展。 电力系统的快速发展也对供电的安全性提出了更高的要求，其中继电保护设备便是确保 整个电力系统能够稳定运行的关键因素之一。这就对电力系统微机继电保护装置提出了 更高的要求。目前我国的微机继电保护装置多采用 16 位单片机，从而无法完成一些复杂的算法 而且处理速度较慢，这就很难满足对当代微机保护提出的高速率与高精度的要求。针对 这一问题，本文研究了基于 DSP 的双 CPU 结构微机继电保护装置，在硬件电路的设计 上，采用了 TMS320LF2407 芯片，不仅利用了 DSP 处理速度快和可以完成复杂算法的 优势，而且采用了双 CPU，使两个 CPU 各负其责，从而大大提高了数据处理的速度和 精度。在软件设计上，采用了 FFT 快速傅里叶算法来完成微机继电保护的数据处理。本文首先介绍了微机保护的发展的背景，意义及发展趋势，并重点分析了一些先进 的硬件设计及具体应用，然后介绍了多种微机保护常用的算法以及装置软件设计中采用 的 FFT 算法，并在最后试验验证了方案的可行性与有效性。文章最后还介绍了一些微 机装置在软硬件上的抗干扰措施，目的是提高微机保护装置的可靠性和安全性。关键词：微机保护；DSP；双 CPU；FFT 算法；ABSTRACTIn recent years national economy develops fast and People’s lives become better and better,at the meantime,people will more further rely on the electric Power supply,so the scale of electrical power system and high-voltage fence increase fast. With the inceasing expansion of the electric power system scale, the safe of the Power system become especially important. The relay Protection is one of the key aspects of stable movement of the whole electric power system,so higher requirements are put forward to the protection precision and speed of modern microprocessor protection system.In China the CPU of most microprocessor-based protection device is 16 single chip at present, so it makes the microprocessor protection with higher performance hard to meet the requirement to use complex protection algorithm. in order to solve this problem, this paper studies the dual-CPU microprocessor protection system based on DSP, and uses the TMS320LF2407 chip in the hardware circuit design. Not only the use of the DSP processing speed and complex algorithms can be advantages, but also a dual-CPU, so that the two CPU duties, thus greatly improving the data processing speed and accuracy. In the software system design, the FFT algorithm is chose to realize the microcomputer protection in the data processing.This paper describes the background to the development of microprocessor protection, signif