供电系统的谐波抑制和无功补偿毕业论文.doc

寺河矿区域供电系统的谐波分析与抑制 摘 要 非线性负载的大量应用给电网带来了严重的谐波污染，并由此产生了一系列电能质量问题，而各种敏感负载对电网的供电质量又提出了更高的要求。无源电力滤波器因其结构简单、设备投资少、运行可靠性高、运行费用低，成为电力系统中最普遍的谐波抑制设备。 本文对无源电力滤波器的参数设计方法进行了深入的研究。详细分析各种无源电力谐波器结构和工作原理，并在其基础上对影响滤波器性能的有关参数进行了深入分析，重点研究了等值频偏、品质因数、无功补偿容量特性及系统谐波阻抗对单调谐滤波器和高通滤波器性能的影响。以此作为滤波装置设计的理论基础，为工程设计提供了理论准则。 对电力系统无源滤波装置，在常规调谐滤波器的设计思路上，考虑实际滤波器受电网中的负载和自身元件特性的影响，工作在失谐状态下，采取最佳偏调谐设计的方法设计单调谐滤波器。在给定容量时，对全调谐、经验偏调谐、最佳偏调谐设计进行计算，对比结果，得出最佳偏调谐设计所得相对容量较小滤除谐波能力更好的优点。 关键词：无源电力滤波器；谐波抑制；滤波效益；失谐 Abstract Wide-range application of nonlinear load has brought serious harmonic pollution to power grid,as well as a series of power quality problems.However,some sensitive load has tougher and tougher requirement on power quality.Therefore,Passive power filter(PPF)is most widely used as harmonic-eliminating device in power system,because of simple configuration,low investment,high reliability,and low operation cost.This paper penetrates on aprofound and detailed study on the parameter design of PPF. First,this paper analyses the configuration and working principle of PPF.Moreover,a thorough analysis is conducted on the factors which are related tothe filter’s characteristics,including the effects of equivalent frequency offset,quality factor,reactive power capacity of the single tuned filter(STF)and highpass filter(HPF),the system equivalent harmonic impedance etc. As thefoundation of designing filter,this step would supply the design principles for the coming engineering design methods. To the electrical power system harmonic suppression, this article profits from the conventional harmonious filter the design mentality, considering the actual filter influenced by the electrical network load and own part characteristic, works under the detune condition, adopts the best harmonious design method to design the signal-tuned filter. When assigns the capacity, carry on computation to entire harmonious, the experience harmonious and the best harmonious design, contrast the result, obtains the best harmonious design h