基于ARM的电能质量检测装置硬件系统设计与实现

发布时间：2018-05-11 01:14

本文选题：电能质量 + 谐波分析　；参考：《电子科技大学》2012年硕士论文

【摘要】：近年来,现代电网及其负荷构成发生了比较大的变化,大量电力电子设备投入使用,此类非线性、冲击性负荷使电网产生了诸如电压扰动、电压波形畸变、闪变和谐波等电能质量问题。与此同时,越来越广泛应用的电子仪器和自动化设备等敏感设备对电能质量的要求也越来越高。针对日益严重的电能质量问题和用电设备对电能质量的要求日渐提高的现状,研究和设计用于监测和分析电网电能质量的高性能电能质量检测装置就具有很重要的意义。论文结合国内外电能质量检测仪器的现状,设计了基于ARM核微控制器的电能质量检测装置的硬件系统,主要工作为对电能质量检测装置硬件系统的设计与实现及对整个系统的调试和改进。首先,本文依据我国电能质量标准和IEC标准归纳总结了电能质量参数的含义、特性和相关指标,接着介绍了各个参数的测量模型及其测量原理,对通常使用的软件同步采样方式进行了改进,还对测量通道间的相位不匹配问题进行了研究,提出本文保证线性相位和进行通道间相位补偿的解决方案。其次详细设计了基于ARM的电能检测装置的硬件系统,主要包括信号调理模块、基于AD7606的模数转换模块、基于S3C2440的核心处理模块、系统供电模块。最后对硬件电路和整个系统进行了实际电网测试,对实验结果进行了分析,提出了改进意见。实验表明,本装置基本实现了电能质量各参数的测量功能和拥有很高的测量精度,主要包括对电网频率、电压/电流有效值、谐波含量、总谐波失真度、三相电压不平衡度的测量,电压和频率的精度分别为±0.5%,±0.01Hz。高次谐波的测量精度有待改进。
[Abstract]:In recent years, great changes have taken place in the modern power network and its load composition. A large number of power electronic equipment have been put into use. Such nonlinear and impact loads have made the power network produce such as voltage disturbance and voltage waveform distortion. Power quality problems such as flicker and harmonics. At the same time, sensitive equipments, such as electronic instruments and automation equipments, which are more and more widely used, require more and more high power quality. In view of the increasingly serious problems of power quality and the increasing demand for power quality of electric equipment, it is of great significance to study and design a high performance power quality detecting device for monitoring and analyzing power quality of power grid. According to the current situation of domestic and foreign power quality testing instruments, the hardware system of power quality detection device based on ARM nuclear microcontroller is designed in this paper. The main work is to design and implement the hardware system of the power quality detection device and to debug and improve the whole system. Firstly, according to the power quality standard and IEC standard of our country, this paper summarizes the meaning, characteristic and related index of the power quality parameter, then introduces the measuring model of each parameter and its measuring principle. The software synchronization sampling method is improved and the phase mismatch between the measuring channels is studied. The solution to ensure linear phase and phase compensation between channels is proposed in this paper. Secondly, the hardware system of the power detection device based on ARM is designed in detail, including signal conditioning module, analog-to-digital conversion module based on AD7606, core processing module based on S3C2440 and power supply module of the system. Finally, the hardware circuit and the whole system are tested, the experimental results are analyzed, and the improvement suggestions are put forward. The experimental results show that the device basically achieves the function of measuring the parameters of power quality and has a high measuring accuracy, mainly including the frequency of the power network, the effective value of voltage / current, the harmonic content, the total harmonic distortion, and so on. The accuracy of measurement of unbalance of three-phase voltage, voltage and frequency is 卤0.5 and 卤0.01 Hz, respectively. The measurement accuracy of high order harmonics needs to be improved.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TM761;TP368.12

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