非线性负载

随着工业电力电子技术的发展，电力系统中的非线性负载越来越多，由此带来的谐波公害越来越严重。

As the rapid development of power electronic technology , non-linear loads bring the serious harmonic contamination .

各种非线性负载在电力系统中的广泛使用导致大量的谐波注入电网。

With wide application of abundant non-linear loads , a large number of harmonics are generated and inject into the power grid .

最后，利用Matlab软件对系统带非线性负载时的补偿性能进行仿真。

The compensation performance of the system with nonlinear loads is simulated with Matlab .

实验结果表明，采用的基于ip，iq算法的谐波检测方法能有效、准确的检测谐波，采用的电流追踪控制方法能控制有源电力滤波器实验系统有效消除由非线性负载产生的谐波。

The experiment result indicates that the whole experimental device based on DSP can eliminate harmonic effectively caused by nonlinear load .

一些常见的非线性负载有荧光灯、控硅电动机启动器以及UPS系统。

Some common nonlinear loads are fluorescent lighting , SCR motor starters and UPS systems .

并联型APF在容性非线性负载中应用

Application of shunt active power filter in capacitive nonlinear load

功率因数校正器采用频率固定的PI控制，实现了在各种非线性负载下降低电流谐波含量，提高功率因数的目的。

As a result , it reduces the content of harmonic current and improves the power factor with a group of nonlinear loads .

详细分析了死区和非线性负载导致SPWM逆变器输出电压畸变的机理。

The influence of dead-time and nonlinear loads on the output voltage in a SPWM inverter is analyzed in detail .

实验表明，采用该控制方案能将UPS带非线性负载时的波形失真降到1.1%

With this control scheme , a value of THD as low as 1.1 ? % with a nonlinear load is obtained in the experiments .

提出了一种简单有效的三相三线并联有源滤波器（ActivePowerfilter，简称PFC）控制策略，以实现补偿电流的注入，从而消除非线性负载的谐波电流。

An effective and simple control strategy for three-phase three-wire shunt Active Power Filter ( APF ) is presented , which can implement the injections of compensation current to eliminate harmonic currents of nonlinear load .

阻性负载情况下，输出电压THD达到2.02%；非线性负载情况下，输出电压THD为4.17%。

The THD of output voltage is 2.02 % under resistive loads and 4.17 % under nonlinear loads .

实验结果表明，采用id、iq法能够实时、准确地检测出非线性负载的谐波电流和无功电流，为有源滤波技术的实现奠定了基础。

Experimental results demonstrate that the id 、 iq method based on instantaneous reactive theory can both detect the harmonic current of nonlinear load , and obtain the reactive current rapidly .

针对非线性负载时变未知情形，介绍了非线性反馈的无源性控制（PBC）方法。

Aiming at the time-varying unknown condition of non-linear load , passivity-based control ( PBC ) with non-linear feedback was introduced .

同时，从补偿和滤波两种思想出发，指出并联型谐波补偿有源电力滤波器（APF）的补偿作用和串联型基波补偿APF的滤波作用可适用于非线性负载谐波电流的抑制。

From the idea of compensation and filtering , the parallel compensating harmonic APF and series compensating fundamental wave APF are suitable for suppressing harmonic current .

非线性负载的变化是影响有源电力滤波器（APF）稳定控制的主要因素之一，基于无源性的控制（PBC）方法为此提供了有效的解决方案。

Passivity-based control ( PBC ) strategies provide a solution to reinforce transient stabilization of active power filters ( APF ) with variable nonlinear loads .

大功率白光LED是新一代绿色照明光源，具有节能、环保、易控等多方面优势，但其固有的非线性负载特性和敏感的温升特性使其需要专门开发可控电流源式的LED驱动器。

The high-power white light LED is a new generation green light source . It can save energy and controlled easily . But it has to use special LED driver because of its non-linear load characteristics and sensitive temperature characteristics .

在均匀多导体传输线的时域有限差分法（FDTD）基础上，对非均匀多导体传输线及端接非线性负载的情况进行了分析。

Based on the uniform multi-conductor transmission lines ( MTL ), the FDTD method is adopted to research the transient response of the nonuniform transmission lines with nonlinear loads .

Matlab仿真表明这种控制策略在线性负载和周期性非线性负载下均能对参考正弦波的跟踪获得良好的动、静态响应效果。

Matlab emulate shows that this controlling strategy can get a good the transient state and the steady state effect of track of the reference of the sine wave under linearity load , as well as nonlinearity load .

然而由于功率器件耐压水平的限制，传统两电平APF难以实现高压非线性负载谐波的补偿。

However , due to the limitations of voltage level of power devices , the traditional two-level APF is difficult to achieve harmonic compensation for high-voltage nonlinear load .

最后通过MATLAB分别对稳态谐波、非稳态谐波和非线性负载谐波进行仿真分析，仿真结果证明了该方法的有效性。

Finally , the simulation using MATLAB for steady-state harmonic , non-stationary harmonic and nonlinear load harmonic are shown in this paper . The results show that the harmonic components can be detected at real time with high precision .

对非线性负载所产生电流谐波和电网电压畸变的问题进行HHT分析，从分析结果中计算出信号的状态参数比用FFT方法和模糊分析方法的检测结果的精度要高。

Though the HHT analysis of harmonic distortion in current and voltage caused by the nonlinear , we found much higher accuracy in the signal parameters than the FFT method and fuzzy analysis .

仿真结果表明，该并联型APF系统能够有效地补偿非线性负载引起的谐波和无功电流，性能良好。

It is found in the simulation results that the proposed shunt APF can compensate the harmonic and reactive current validly caused by nonlinear loads , as well as , the performance is well .

在400V低压配电系统中随着非线性负载的比例逐渐加大，其负载性质发生深刻变化。

With non-linear load proportion increasing gradually in low voltage power distribution system , its load property changes a lot .

仿真结果表明，单极调制单周控制APF能有效补偿非线性负载所导致的谐波和无功电流，补偿后电源电流中不含直流分量；

The simulative results show that the unipolar modulation APF with one-cycle control can compensate the harmonic and reactive currents caused by nonlinear load effectively and there is no DC off-set in the compensated source current .

该文提出一种基于极点配置的逆变器瞬时电压PID控制器设计方法，使PID控制逆变器动态响应快速、非线性负载情况下输出电压THD低，稳态精度高，系统鲁棒性强。

The design method of inverter instantaneous voltage PID controller based on pole-assignment is proposed in this paper . This method makes PID controlled inverter provides fast dynamic response , low output THD with nonlinear load , nice static characteristics and is a robust system .

研究了有源电力滤波器、电源、非线性负载三者之间的能量交换机理，分析了变流器直流侧电容电压的稳定问题，并提出了用PI控制器维持直流侧电容电压稳定的方法。

The principle of energy commutation among APF , source and nonlinear load is studied , the stability of the dc bus capacitor voltage is analyzed and a method , using PI controller to maintain the stability of the dc bus capacitor voltage , is presented .

为了有效地补偿非线性负载中的谐波电流，针对数字化的有源滤波器（APF）内部结构固有的延迟特点，提出基于灰色预测的APF预测控制方案；

According to the inherent delay characteristic of digital active power filter ( APF ), a prediction control method for APF is presented based on the gray prediction , with the aim of effectively compensating the harmonic currents in nonlinear loads .

由于功率器件耐压水平的限制，传统的2电平拓扑结构有源电力滤波器（APF）难以实现对高压非线性负载的谐波补偿。

Due to the overvoltage limitation of the power devices , it is very difficult to mitigate harmonic produced from the nonlinear loads in high voltage grids with the help of a traditional active power filter ( APF ) with two-level inverter .

有源电力滤波器单独使用时，能够很好的补偿非线性负载产生的谐波电流，使得电流畸变率THD下降到5%以下，而且对11次谐波的补偿效果较好，补偿后11次谐波含量下降到2%以下。

When the active power filter used alone , it can compensate harmonic current that the nonlinear load generates , and the total harmonic distortion ( THD ) drops to below 5 % , the harmonic content of 11th harmonic down to below 2 % .

通过一系列实验验证了将基于CPS-SPWM技术的级联型多电平变流器应用于APF上能较好地实现对非线性负载引起的谐波及无功污染的补偿，有良好的工业应用前景。

Experimental results prove that the shunt APF system with cascade multilevel converter based on CPS-SPWM can achieve excellent compensation effect even under much lower switching frequency . We can easily get to the conclusion : this method has a perfect prospect in industry application .