有源电力滤波器技术与发展综述

有源电力滤波器是当前电力电子技术应用的一个热点,它为电力谐波治理和改善电能质量提供了重要的技术手段。本文重点从三个方面介绍当前我国有源电力滤波器技术发展情况：有源电力滤波技术的应用背景,有源电力滤波器的技术发展方向,以及有源电力滤波器的行业发展与市场前景。     

三相整流桥直流侧和交流侧并联型有源电力滤波器比较研究

三相直流侧和交流侧有源电力滤波器均可用于三相不可控整流桥的谐波治理。从谐波补偿效果、有源滤波器的补偿容量、开关应力三个方面对二者进行了分析和对比。分析结果表明,由于直流侧有源电力滤波器并联在整流桥的直流侧,在换相处的负载电流变化率比交流侧小得多,因此直流侧有源电力滤波器的补偿性能优于交流侧有源电力滤波器。同时由于直流侧有源电力滤波器工作在电压电流两个象限,因此其补偿容量和开关应力远小于交流侧有源电力滤波器。     

有源电力滤波器的研究热点和发展

有源电力滤波器研究已成为目前国内外供电系统谐波抑制研究的热点。本文首先介绍了两种谐波治理的措施。然后重点对有源电力滤波器研究中的拓扑结构、检测和控制理论、数字化控制技术发展等研究热点进行介绍和分析。最后指出了有源电力滤波器今后发展的一些主要方向。[编者按]     

电力有源滤波器在供电系统中的应用（续）

电力有源滤波器在供电系统中的主要应用是补偿电网中的谐波和无功功率,依此改善交流电源的供电质量。文中介绍了电力有源滤波器的电路结构以及控制方式。给出了电压型电力有源滤波器、电流型电力有源滤波器、多模式电力有源滤波器以及混合型电力有源滤波器的电路结构,并重点介绍无功电流和谐波电流的检测、逆变器直流侧电源电压的控制以及混合型电力有源滤波器的控制方案,最后给出了电力有源滤波器的补偿特性。     

电力有源滤波器在供电系统中的应用

电力有源滤波器在供电系统中的主要应用是补偿电网中的谐波和无功功率,依此改善交流电源的供电质量。文中介绍了电力有源滤波器的电路结构以及控制方式。给出了电压型电力有源滤波器,电流型电力有源滤波器,多模式电力有源滤波器以及混合型电力有源滤波器的电路结构,并重点介绍无功电流和谐波电流的检测,逆变器直流侧电源电压的控制以及混合型电力有源滤波器的控制方案,最后给出了电力有源滤波器的补偿特性。     

并联型有源滤波器原理及MATLAB仿真

有源电力滤波器（Active Power Filter,缩写为APF）是近年来治理电力系统谐波污染非常有效的装置。阐述了有源电力滤波器的基本原理,分析了并联型三相三线制APF结构,对APF系统的谐波检测和PWM控制方法进行了仿真,验证了APF的有效性。     

注入式混合型有源滤波器的参数设计及仿真研究

在配电网高压、大容量的谐波治理的背景下。提出了采用注入式混合有源电力滤波器的谐波治理方案。重点介绍了各个组成部分的设计方法。无源滤波器包括单调谐滤波器和注入滤波器,根据投资成本最小的方法设计。有源部分与基波谐振电路并联来减小有源部分容量;无源部分还可以提供很大的无功补偿容量。而且不影响有源部分的容量。仿真结果表明提出的混合有源滤波器的可行性。     

基于TMS320LF2812的并联型有源电力滤波器的设计与实现

针对谐波抑制和无功补偿的问题,对有源电力滤波器进行一系列研究,阐述了有源电力滤波器的基本原理以及控制策略。基于TMS320LF2812设计了有源电力滤波器,包括DSP控制板、电压采样电路,电流采样电路以及IPM功率单元的设计,并给出了有源电力滤波器的软件设计。最后利用MATLAB仿真软件对所涉及的有源电力滤波器进行仿真,验证了有源滤波器系统的正确性以及谐波补偿电流和滞环比较控制模块的有效性。     

关于电网质量、试验及验收的标准

因为有源电力谐波滤波器技术相对较新,在国内应用尚不普及,针对有源电力谐波滤波器我国尚无专门的国家标准和行业标准,但从电力质量及其它相关标准中,可以参照使用,下面标准可用作有源电力谐波滤波器的参照标准：     

三相电路有源滤波器的试验研究

在电网运行过程中,谐波与无功由于大量非线性负荷的使用以及单机容量的不断增加而相应产生。就谐波而言会导致电网谐波污染的产生。对此,有源电力滤波器是治理电网谐波、无功污染、改善电能质量的最有效手段,现今已成为电力电子技术应用的一个重要研究热点。本文就三相电路有源滤波器的试验研究做了一些分析及论述,提出了一些想法与见解。     

3D model representation using spherical harmonics

The authors introduce a method for decomposing a 3D model into spherical harmonic functions for later reconstruction. It is shown that spherical harmonic representations of models are efficient as the amount of data is reduced significantly. This method can be incorporated within model based coding (MBC) applications resulting in a performance increase     

大容量变流设备谐波的产生和一种谐波计算方法

在工业系统中,大容量的变流设备是主要的谐波产生源,本文主要针对变流设备介绍一种实用的谐波计算方法,在设计时可作为谐波评测和治理的重要依据之一。     

Harmonic decomposition of audio signals with matching pursuit

We introduce a dictionary of elementary waveforms, called harmonic atoms, that extends the Gabor dictionary and fits well the natural harmonic structures of audio signals. By modifying the "standard" matching pursuit, we define a new pursuit along with a fast algorithm, namely, the fast harmonic matching pursuit, to approximate N-dimensional audio signals with a linear combination of M harmonic atoms. Our algorithm has a computational complexity of O(MKN), where K is the number of partials in a given harmonic atom. The decomposition method is demonstrated on musical recordings, and we describe a simple note detection algorithm that shows how one could use a harmonic matching pursuit to detect notes even in difficult situations, e.g., very different note durations, lots of reverberation, and overlapping notes.     

中频感应炉谐波治理研究

针对中频炉产生的谐波给企业带来的安全生产隐患及对电力系统的严重污染问题,本文简述了中频炉工作原理,分析了其谐波产生的机理和特性,并以宜兴某钢厂中频炉谐波治理工程为例,介绍了谐波测试的概况、内容和结论,结合工程实际及仿真模拟实验,给出了抑制谐波危害的办法,提出了合理有效的治理方案.实践证明该方案滤波及无功补偿效果良好,节能效果显著.     

Correlation filters with controlled scale response.

Correlation filtering methods are becoming increasingly popular for image recognition and location. The recent introduction of optimal tradeoff circular harmonic function filters allowed the user to specify the response of a correlation filter to in-plane rotation distortion. In this paper we introduce a new correlation filter design that can provide a user-specified response to in-plane scale distortion. The design is based on the Mellin radial harmonic (MRH) transform and incorporates multiple harmonics into the correlation filter for improved discrimination capability. Additionally, the filter design minimizes the average correlation energy in order to achieve sharp correlation peaks, and thus we refer to these filters as minimum average correlation energy Mellin radial harmonic (MACE-MRH) filters. We present underlying theory, a MACE-MRH filter design method, and numerical simulation results.     

有源电力滤波器空间矢量滞环控制的研究

针对因非线性负载引起的电网谐波污染问题,引入有源电力滤波器(Active power filter,APF)进行治理.分析滞环比较法的工作过程并指出不足,引入空间矢量法解决输出电压相间干扰问题.改进APF的控制策略,把滞环比较和空间矢量结合起来实现电流跟踪控制.最后通过MATLAB/Simulink仿真,比较两种控制策...     

基于谐波提取的欠定语音盲分离方法

现有的欠定语音信号盲分离算法往往不能同时兼顾分离性能及效率。针对此问题,本文提出一种基于谐波提取的欠定盲分离方法。首先,利用频谱校正从混合信号的短时傅立叶变换中提取谐波参数,其次利用相位一致性准则甄别这些参数的单源属性,进而用自适应K-均值方法对单源模式做聚类而获得源数估计和混合矩阵估计,最后再用子空间投影法恢复源信号。其中谐波提取和单源参数筛选可保证低复杂度地精确估计出混合矩阵。仿真实验表明,相比于原始子空间投影算法,本文方法可获得更高的信号恢复质量,且在谐波相关领域也具有潜在应用价值。      

Third-harmonic supply current minimization in single-phase AC/DC converters

One effect of the second-harmonic in the load-side current ripple of a single-phase AC/DC converter is to introduce an unwanted third-harmonic into the supply-side current. Although this can be neither eliminated nor reduced by either conventional selective harmonic or natural sinusoidal PWM strategies, it is shown that the use of a modified switching function in the selective strategy enables a considerable reduction to be achieved. Possible applications for the new strategy include single-phase AC/DC converter-fed DC drives and converters providing a DClink for inverter-fed DC drives.     

Harmonic piezodrive — miniaturized servo motor

Miniaturised dc-motors used in servomotor applications show some disadvantages like very high speed and therefore are combined with gearsets of a high gear ratio which introduce backlash and low efficiency. This article proposed a different kind of motor principle by the combination of a harmonic drive gearbox and stack piezoactuators. The actuators replace the functionality of the wave generator generating a travelling wave into the flexspline element of the gearbox. After some theoretical conclusions for control and torque calculations the functionality of the new motor principle is proven by a prototype.     

A Unified Artificial Neural Network Architecture for Active Power Filters

In this paper, an efficient and reliable neural active power filter (APF) to estimate and compensate for harmonic distortions from an AC line is proposed. The proposed filter is completely based on Adaline neural networks which are organized in different independent blocks. We introduce a neural method based on Adalines for the online extraction of the voltage components to recover a balanced and equilibrated voltage system, and three different methods for harmonic filtering. These three methods efficiently separate the fundamental harmonic from the distortion harmonics of the measured currents. According to either the Instantaneous Power Theory or to the Fourier series analysis of the currents, each of these methods are based on a specific decomposition. The original decomposition of the currents or of the powers then allows defining the architecture and the inputs of Adaline neural networks. Different learning schemes are then used to control the inverter to inject elaborated reference currents in the power system. Results obtained by simulation and their real-time validation in experiments are presented to compare the compensation methods. By their learning capabilities, artificial neural networks are able to take into account time-varying parameters, and thus appreciably improve the performance of traditional compensating methods. The effectiveness of the algorithms is demonstrated in their application to harmonics compensation in power systems