无源滤波器

在已安装无源滤波器的基础上，将有源滤波器通过小电感与无源滤波器相连，设计了混合有源滤波器。

On the basis of installed PPF , connecting active power filter to PPF by small inductor , a hybrid active power filter was designed .

新型PWM逆变器输出无源滤波器的研究

Research on a novel PWM inverter output passive filter

与可变参数LC无源滤波器混合使用的并联型有源滤波器

The Combined System of Shunt LC Passive Filter and Active Power Filter

其中，并联滤波支路由PWM变换器2通过变压器T和无源滤波器串联后并联接入系统。

Where , the converter 2 is connected to the passive filters in series through a transformer T.

与并联型有源电力滤波器混合使用的可调参数LC无源滤波器的参数调节策略和方法。

The strategy and methods of the adjustable LC passive filter is brought up .

LC无源滤波器（主要是高通滤波器）参数调节对阻抗特性和无功补偿的影响。

The influence of parameter adjuster upon the impedance and reactive power of LC passive filter .

LC无源滤波器已成为有源电力滤波系统的辅助器件之一；

LC passive filters have become one of the assistant devices in active power filters system ;

传统的LC无源滤波器，由于其技术上的局限性，无法满足高滤波性能的要求。

Traditional LC passive filters , because of their technical limitations , unable to meet the requirements of high performance filter .

LTCC无源滤波器的研究现状及进展

Research Status and Development of LTCC Passive Filters

提出了一种抑制低压电网谐波的LC无源滤波器。

The LC harmonic filter without source has been provided , and it can restrict the harmonic of lower power electric network .

LC型无源滤波器能滤除逆变器开关频率附近的谐波分量，但会引起系统振荡；

LC passive filter can filtrate the harmonic components whose frequencies near the switching frequency of the inverter , but power system oscillation may be caused .

采用晶闸管相控电抗器（TCR）的无源滤波器可以增大电源系统的容量，降低成本；

To use the passive powered filter with TCR can enlarge the capacity of power source system , and reduce its cost .

依赖于PSpice仿真，给出了相关的仿真和实验波形，结果验证了无源滤波器的实用性。

Depending on the simulation of PSpice , the paper gives the simulation and experimental waveforms which shows the practicability of passive power filter .

锁相环采用二阶的模拟锁相环结构，鉴相器采用Gilbert乘法器，环路滤波器采用无源滤波器，VCO采用3级环形振荡器。

The analog PLL contains three basic components : a Gilbert multiplier PD , a passive filter and a three-stage ring oscillator .

本文针对LC无源滤波器和传统的电压源型并联混合电力滤波器的缺点，提出了一种新型的并联混合电力滤波器。

A novel single - phase parallel hybrid power filter is presented in this paper , which can eliminate drawbacks of LC passive filter and the conventional voltage source parallel hybrid power filter .

对高压大容量谐波源国内外目前主要是采用LC谐振型无源滤波器（PassivePowerFilter，PF），这些滤波器还兼有无功和负序补偿功能。

Passive Power Filter ( PF ) is always applied in the high voltage and large capacity conditions . The principle is LC resonance . Not only can be used for harmonic filtering , PF also can work for reactive power compensation .

它由纯调谐LC无源滤波器、附加电感和有源电力滤波器（APF）构成，APF控制成谐波电流源。

The novel power filter consists of the well tuned LC passive filter , the additional inductor and the active power filter ( APF ) which is controlled as a harmonic current source .

采用双DSP芯片技术，将传统的频域分析FFT计算与现代的瞬时无功功率理论相揉和，进行LC无源滤波器和并联型有源电力滤波器混合系统的设计。

The double DSP technique is introduced , and the furthermore the traditional FFT analysis and nowaday theory of instantaneous reactive power is combined , thus the combined system of shunt passive filters and active power filters is designed .

APF不仅改善无源滤波器的滤波特性，而且彻底抑制电网与无源滤波器之间可能发生的谐振。

APF not only improve the filtering characteristics of passive filters , but also completely inhibited the resonance between the passive filter and network . Currently , the system has been put into operation .

混合型有源滤波器由于有效综合了有源滤波器（APF）和无源滤波器的各自优点，正成为谐波治理和无功补偿一体化系统的研究和发展方向。

Hybrid Active Power Filter ( HAPF ), combined the merits of Active Power Filter ( APF ) and PF , is becoming the researching focus of harmonic eliminating and reactive power compensating equipments .

利用NSGA-II对无源滤波器进行参数优化，不仅能节省初始投资，还能更有效地消除谐波干扰；

With the parameters of passive filter optimized by NSGA-II , the minimum investment is obtained , and the harmonic interference is effectively eliminated .

并将这种改进的粒子群算法首次应用于HAPF系统，设计计算出了无源滤波器的参数和有源部分所占的容量比。

It calculated the parameter of passive power filter and the capacity ratio of the active part occupied .

有源滤波器与无源滤波器串联的并联型混合有源滤波器（SHAPF）更好地结合了无源电力滤波器和有源电力滤波器的优点，造价较低、性能优良。

The shunt hybrid active power filter has good character and lower cost .

目前，对高压大容量谐波源国内外主要是采用无源滤波器（PassiveFilter，PF），但其滤波效果受电力系统阻抗的影响较大，且只能消除特定次数的谐波。

At present , passive filter ( PF ) is always applied in the high voltage and large capacity conditions . But PF can not adjust to the changeful order harmonics and the filtering effect is easy to be influenced by the power system reactance .

因此，论文在频域方面，基于开关电流双线性积分器采用跳耦法模拟梯形无源滤波器构造高斯带通滤波器来实现Morlet小波变换。

In frequency-domain , switched-current integrators are used to synthesize Gaussian band pass filter by using leapfrog configuration to simulate passive ladder filter to implement the wavelet transform of Morlet .

片上电感是高性能压控振荡器（VCO）、低噪声放大器和无源滤波器等集成电路模块的重要元件。片上电感品质因数低，占据较大的芯片面积是需要解决的两个主要问题。

On-chip inductors are important , performance-limiting , large die area components in monolithic radio frequency ( RF ) circuits , such as voltage-controlled oscillators ( VCO ), low-noise amplifiers and passive-element filters .

该滤波器利用晶闸管控制电抗器（TCR）作为可变电抗器，通过改变它的触发角来改变可变电抗器的等效电感，使滤波器在电容变化后重新回到谐振状态，从而实现无源滤波器的自动调谐。

It changes the equivalent induction of the variable reactor by adjusting the thyristor 's triggering angle to make the filter holding resonance after the capacitance deviated , and the filter finishes self tuning process .

早期谐波补偿采用无源滤波器（LC滤波器），但由于设计原理及滤波方式本身固有的缺陷，不能达到完善、随机治理的目的，有源滤波器可以克服无源滤波的不足但其容量不大。

Early harmonic compensation is completed by the passive filter which can not implement perfect and random management for its design principle and the intrinsic defects , while the active filter can conquer the defects but its capacity is very small .

但是APF在国内的应用还远没达到成熟阶段，与无源滤波器相比，在实际应用中仍然居于次要地位，有很多问题有待于进一步研究和完善。

But APF has not reached the mature stage in the domestic applications , and has many problems to more study and improve . Compared with passive filter , APF still stays in less important position in actual application .

传统的无源滤波器即LC滤波器具有结构简单，运行可靠性较高，运行费用较低等优点，而且它既可以补偿谐波，又可以补偿无功功率，在国内一直被广泛使用。

The traditional passive filter also named as LC filter has its advantages such as simple structure , high , operation reliability , low operation cost and so on , and it can compensate harmonics and var , so it 's widely used .