基于labview的谐波分析仪的设计.doc

基于LabVIEW的谐波分析仪的设计 摘要：由于大量变频器、整流器和电弧炉等非线性负荷的接入，电网中谐波污染情况日益严重，对电网谐波含量进行实时准确地测量是分析和控制电网谐波含量的依据。虚拟仪器技术在电力系统中具有极其广阔的应用前景，其在数据采集、信号处理、网络通信等方面的巨大优势为监测工作注入了新的活力，它代表着目前测试仪器领域的发展方向。虚拟仪器的实质是利用计算机来模拟传统计算机的各项功能，LabVIEW是一种功能强大的虚拟仪器开发平台，它将高速发展起来的计算机技术、电子技术、通信技术和测试技术有机地结合起来，为仪器的发展提供了一条崭新的道路。传统的谐波分析仪器技术更新周期长，价格较高，与传统仪器相比，利用虚拟仪器技术开发了一种新的谐波分析仪，其在智能化程度、处理能力、性能价格比、可操作性等方面具有明显的优势。LabVIEW为设计谐波分析仪提供了一个可靠而有效的途径。利用谐波分析子模块对畸变信号进行分析,较直观地得出基波和谐波情况。通过加窗函数的方法使谐波测量精度大大提高,从而可以对谐波进行有效的分析、处理和预防。 关键词：LabVIEW；虚拟仪器；谐波分析仪 Design of harmonic analyzer based on LabVIEW Abstract: due to a large number of frequency converters, Rectifier and nonlinear loads such as electric arc furnace of access, power grid harmonic pollution increasing, the harmonic content in real time and accurate measurement is the basis for analysis and control of harmonic content. Virtual instruments technique and its application in power systems, with an extremely broad prospects, its data acquisition, signal processing, network communications, enormous advantages in such areas as monitoring has injected new vitality, it represents the current development direction in the areas of test instruments. Essence of virtual instruments is the use of computers to simulate the functions of the traditional computer, virtual instrument LabVIEW is a powerful development platform, it developed high-speed computer technology, electronics technology, communication technology and organic combination of measuring and testing techniques, for the development of instruments to provide a new road. Harmonic analysis of the traditional long instrument technology refresh cycle, higher prices, compared with traditional instruments, the use of virtual instrument technology to develop a new harmonic Analyzer, the intelligent, processing power, price-performance ratio, operability, and so has obvious advantages. LabVIEW for design of harmonic Analyzer provides a reliable and efficient way. Using harmonic analysis modules to analyze the distortion signals, more i