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摘要
电力参数的准确、快速测量对于实现电网调度自动化、保证电网安全与经济运行具有重要的意义。对于电力参数进行高精度、多参数的测量,是充分了解电网的运行状况,寻找并解决电力系统中出现问题以及实现电力系统自动化的重要途径。因此对于电力参数的测量,尤其是高精度、多参数、低价格、便携、稳定的实时测量就显得尤为重要,也一直是人们研究的一个重要的方向。
本文首先对电力参数测试仪的发展状况和背景做了综述。对频率、电压和电流有效值的测量原理进行了详细的理论阐述。接下来,对电力参数智能检测仪的总体设计方案进行了介绍。仪器整体分为两大部分:数据采集和处理系统、数据显示和存储系统。本文重点完成了数据采集和处理系统的软、硬件设计。其中硬件部分主要包括模数转换部分电路、处理器及外围电路、存储器扩展电路、逻辑控制电路。系统采用AT89S51单片机来实现电力参数的交流采样,通过液晶显示器显示频率、电压和电流的实时值。软件部分主要包括主程序、数据采集、数据处理的流程图和程序设计。该装置可用来测量单相交流电路的电压、电流、频率等参量。最后,通过对装置进行整体测试和分析,基本达到预期的设计目标。
关键词:单片机 电力参数 检测仪
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Abstract
The electrical parameters of accurate, rapid measurement has important significance for the realization of the power grid dispatching automation to ensure grid security and economic operation.It is very important for acquiring the running state and solving the problems of the power supplying system to perform high accurate, multi-parameter, low-cost, portable, real time and stable measurement of power parameters. It is also one major subject on which the researchers have focused for many years.
Firstly, the power parameter detector development and background are reviewed. Carried out a detailed theoretical explanations of frequency, voltage and current rms measurement principle. Next, the overall design of the electrical parameters smart detector was introduced. The instrument as a whole is divided into two parts: data acquisition and processing systems, data display and storage systems. This article focuses on the completion of the data acquisition and processing system software and hardware design. The hardware part includes an analog-to-digital conversion portion of the circuit, the processor and the peripheral circuit, a memory expansion circuit, a logic control circuit. The AT89S51 Single Chip Microcomputer (SCM) is utilized to realize the AC sampling of the electric power, then, the real-time frequency, phase difference, voltage and voltaic is displayed by the LCD.. The software
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