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提高供电企业电气设备试验仪器集成度的研究
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摘要
电气设备试验对于电气设备的安全运行有着极其重要的作用,在供电企业的生产运行中具有很高的地位和价值,它是电气设备安全、稳定运行的重要保证。本文通过对供电企业电气设备试验的现场调研,将电气设备试验分为直流电源试验类、交流电源试验类、油和气体试验类和其他试验类等四部分,并着重研究交流电源试验类。通过对此类试验的原理和方法的研究,得出可以将变压器空载损耗测量、空载电流测量、负载损耗测量、阻抗电压测量、短路阻抗测量、零序阻抗测量、变比试验、线路参数测量等一些综合到一个试验平台上进行试验的结论。根据这个结论开发了一种多功能参数测量仪,采用Atmel公司的AT89C55来作为多功能测量分析仪的微控制器,并做出了单片机最小系统的设计,利用Lattice公司生产的可编程逻辑器件芯片来完成逻辑控制功能,通过自行设计的电压和电流采集电路达到了对前端信号调理的目的,保证了测量精度,选用美国AD公司推出的A/D转换器AD1674对电压和电流信号进行转换,完成了对硬件系统的设计,并对多功能参数测量仪进行了软件部分的开发,完成了对多功能参数测量仪的研制。
Electrical equipment testing for the safe operation of electrical equipment has its important role in the power supply enterprises with high status and value, it is the important guarantee for electrical equipment safe and stable operation. In this paper, based on the site investigation of electrical equipment testing supply enterprises, electrical equipment testing is divided into the DC power supply testing, AC power testing, oil and gas testing and other classes such as four parts, and focuses on the AC power testing. Through the researching on the principles and methods of AC power testing, transformer load loss can be measured, no-load current measurement, load loss, impedance voltage measurement, short-circuit impedance measurement, zero sequence impedance measurement, variable ratio test, measurement of line parameters and some integrated into an experimental platform to test the conclusions. According to the conclusions of the development of a multi parameter measurement device, Atmel corporation AT89C55 used as a measuring and analyzing multi-functional micro-controller, and made the smallest single chip system design, use of Lattice's programmable logic devices to perform logic control chip, designed by the voltage and current acquisition circuit achieved the purpose of front-end signal conditioning to ensure the accuracy, used the A/D converter AD1674 of ADI to convert voltage and current signal, completed the hardware system design, at the same time, the multi parameter measuring software components was developed, completed the multi parameter measurement instrument.
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