基于瞬时无功功率理论的谐波电流检测的仿真研究

文档编号:DQ142   文档字数:16783,页数:37

摘要

 随着电力电子装置的广泛应用及大量非线性负荷的投入运行，电力系统的谐波污染也日趋严重。传统用LC滤波装置虽然简单，但有一定的局限性。电力电子技术的发展，为电力系统谐波的治理提供了新的方法，采用有源滤波技术既可对电网的谐波进行抑制，改善电力线路的电流波形，还能补偿电网的无功功率，提高电网的功率因数。
 有源电力滤波器由于能动态补偿电网中各次谐波，且响应速度快而正成为治理谐波污染的最有效设备之一。电力有源滤波器作为目前谐波抑制非常行之有效的措施，对它的研究很有价值。
 本文对无源滤波器和有源滤波器进行了较为全面的比较，从原理上分析了电力有源滤波器抑制谐波的原理。有源电力滤波器中的谐波电流检测是重要环节之一，谐波电流检测的准确与否，影响到有源滤波器的滤波效果。本文着重对瞬时谐波电流检测技术的研究现状和各种检测方法进行了较为详尽的分析研究，最后以并联型APF为对象，采用基于瞬时无功功率理论的ip、iq法，运用PSIM仿真软件建立仿真模型，仿真结果很大程度上达到了预期的效果。
关键词：电力有源滤波器；瞬时无功功率理论；谐波电流检测； PSIM仿真
Abstract

    With the wide application of power electronic devices and put into operation a large number of non-linear load,Harmonic pollution in power systems have become increasingly serious.Traditional LC filter device with a simple,But has some limitations.Power electronics technology,Control for power system harmonics provides a new method.Active filter technology can use the grid to suppress the harmonic,Improve the power line current waveform,Can compensate reactive power grid,Improve the power factor of the grid.
 Active power filter compensation due to the dynamic power in the harmonics, and the response speed and is becoming the most effective pollution control equipment harmonic one. Active power filter harmonic suppression is very effective as the current measures of its great value.
 In this paper, passive filters and active filter for a more comprehensive comparison, from the principles of the analysis of active power filter harmonic suppression principle. Active power filter harmonic current detection is the key link in the accuracy of detection of harmonic currents, affecting the filtering effect of active filters. This paper focuses on the instantaneous harmonic detection research status and a variety of detection methods more detailed analysis and research in order to shunt APF final target, based on instantaneous reactive power theory of ip, iq France, the use of PSIM simulation software established simulation model, simulation results largely achieved the expected results.
Keywords：Active power filter; Instantaneous reactive power theory; instantaneous reactive power ；PSIM simulation

目录
摘要 I
Abstract II
1  绪论 1
1.1 提出问题 1
1.2 谐波研究的意义 1
1.3 谐波的抑制 2
1.4 国内外有关有源滤波及混合滤波的研究现状 2
1.5 本文主要研究的内容 3
2  滤波器的介绍 4
2.1 无源LC滤波器 4
2.2  有源滤波器 6
2.2.1  APF的类型、构成和工作原理 6
2.2.2 电力有源滤波器的分类 7
2.2.3  APF的前景 9
2.2.4  PPF与APF的比较 10
3  瞬时谐波电流检测技术的研究 11
3.1 谐波电流检测的研究现状 11
3.2 基于瞬时无功功率理论谐波电流检测方法研究 12
3.2.1 传统的功率理论回顾 12
3.2.2 瞬时无功功率理论概述 13
3.2.4 一种检测基波正序有功电流分量的新方法 16
3.2.5 方法检测谐波电流 20
4  并联型滤波系统的设计和仿真 22
4.1  PWM控制的基本原理 22
4.1.1 滞环比较方法 23
4.1.2 三角波比较方式 24
4.1.3 空间矢量控制方法 24
4.2 PSIM仿真软件 25
4.2.1  PSIM仿真软件介绍 25
4.3 主电路设计 26
4.4 仿真结果及分析 28
5 全文总结 30
致  谢 31
参考文献 32

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