谐波源

• Why power quality questions are attracting attention increasingly has three chief reasons : the electricity load structure occurs the great change in the modern power system ; very sensitive to power quality control equipment and the electronic installation service based on the computer system of large numbers have been used ; in the power market under the operating mechanism , power is as the commodity , and users certainly puts forward the more and more higher requirement to the commodity quality
  电能质量问题之所以日益受到重视主要有三个原因：现代电力系统中电负荷结构发生了重大变化，谐波源的种类和数量增加；大量对电能质量非常敏感的基于计算机系统的控制设备和电子装置投入使用；在电力市场运行机制下，电能作为商品，用户必然对商品质量提出越来越高的要求。
• Different measurement standard produce the estimate for the meter ' s measurement error . the theoretic analysis shows that the non - linear load is harmonic source , and the harmonic produced by it is transformed by part of basic wave absorbed by it from power system , therefore , traditional measurement mode has some
  通过对非线性负荷的理论分析表明，作为谐波源，非线性负荷所产生的谐波是吸收基波的一部分转化而来，从而说明传统的计量方式具有不合理性，提出相应的解决方法和对策，并建议一种新的电能计量方式供同行研究探讨。
• A model of an 110kv three - phase network is established by matlab / simulink spsfirstly , and the disturbance of harmonic in power system is simulated by a type - ss1electric locomotive in this model . secondly , kinds of short faults are analyzed , thestable and transient voltage waves are obtained . then , a de - noising method is presented , which is based on wavelet packettransform and has better resolution in time and frequency domain
  首先利用matlab / simulink电力系统工具箱中的模块建立了一个110kv的三相输电网络仿真模型,并以韶山1型电力机车为原型,实现对电网中主要谐波源的模拟;然后,对该输电网络中多种短路故障进行了分析,并给出在稳态扰动和暂态扰动情况下的电压扰动信号波形。
• To that large amount and distributed signal phase electrical source , the most effective method is adding power factor correction ( rfc ) stage inside . it can be eliminate the problem at the sources . with the fast development of pfc in these years , one of focus in the pfc research is putting forward new topology
  谐波是电力系统中的主要污染源，对于数量多而且分散的中小功率单相电源系统，最理想的方法就是在电源内部采用功率因数校正( pfc )措施，从根本上消除谐波源，因而功率因数校正技术在近几年来得到了飞速的发展，其中功率因数校正技术研究的一个热点问题就是新的拓扑结构的提出。
• This article analyzed the three - phase full - controlled bridge commuted circuit 、 the three - phase half - controlled bridge commuted circuit and the harmonic occurred by the two circuits . through the analysis to the relative merits of the passive filter and active filter , a new applied harmonic current compensation device was presented in this article
  三相整流装置是广元电力网两大谐波源之一，本文详细地分析了三相全控、半控桥式整流电路及其产生的谐波，在此基础上，对其谐波的抑制进行了探讨。
• At last the components of the system are modeled and simulated with matlab software . the simulation results indicate that the combined system can reduce the capacity of apf effectively , detecting the harmonic current effectively , compensating harmonic current effectively
  结果表明，对单位容量的谐波源，采用与可变参数lc滤波器混合使用的并联型有源电力滤波器系统，能够有效地减少有源滤波器的容量，有效地检测出高次谐波分量，并进行谐波补偿，使系统的电流波形基本保持正弦。
• The paper analyzed the measured harmonic data of xintai power system and studied the harmonic source models of rectifier and electric arc furnace . the calculating method of harmonic voltage and harmonic current of distribution system was also presented . based on the above studies , the software of harmonic calculation of distributed power network is developed using visual basic6 . 0 . the software can be used to calculated harmonic voltage and current detailedly and the input data and calculated results can be transformed to word and excel form
  本文以邢台地区配电网为研究背景，分析了邢台电网谐波实际测量数据，建立了邢台地区配电网中主要谐波源?整流负荷和电弧炉的谐波源模型，给出了配电网谐波潮流的实用计算方法，在此基础上，采用vb6 . 0编程语言研制开发了配电网谐波分析计算软件包。
• The compensation principle of the traditional shunt type active power filter is discussed , which can show that it is only used to compensate the harmonic current source . considering the weakness , the investigated subject of the project is proposed , which is a simplified shunt type hybrid active power filter . the operating principle , mathematical modeling and the compensation characteristics of the subject are discussed in detail
  本文分析了传统并联型有源电力滤波器的工作特性,针对其不足之处,提出本课题的研究对象为一种简化的并联型混合有源电力滤波器,并对此拓扑的工作原理、数学模型和补偿特性进行了深入研究,结果表明它可以用于补偿电流型谐波源和电压型谐波源,从而弥补了传统并联型有源电力滤波器的补偿缺陷。