| 引用本文: | 陈煜达,陈乔夫,张长征,谢冰若.一种新型单相并联型有源电力滤波器[J].电力自动化设备,2007,27(6):78-80 |
| .Single-phase parallel active power filter[J].Electric Power Automation Equipment,2007,27(6):78-80 |
|
|
| 摘要: |
| 提出一种基于谐波磁通补偿原理的单相并联型有源电力滤波器。并联变压器的一次侧绕组与谐波负载相并联,二次侧绕组与逆变器相联,通过对变压器一次侧电压方程分析可知,当采用逆变器在变压器的二次侧注入与一次侧谐波电流呈一定补偿系数的谐波电流时,变压器一次侧对谐波电流呈现近似为零的低阻抗,而对基波电流呈现很大的励磁阻抗,从而输入电力系统中的谐波电流流入变压器支路。通过建立系统的数学模型进行了系统的稳定性分析及稳态误差估算。实验表明,该新型单相并联型有源电力滤波器简单可靠,并取得了较好的滤波效果。 |
| 关键词: 有源电力滤波器,变压器,磁通补偿,数学模型 |
| DOI： |
| 分类号:TN713.8 |
| 基金项目:国家自然科学基金资助项目(50477047)~~ |
|
| Single-phase parallel active power filter |
|
CHEN Yu-da CHEN Qiao-fu ZHANG Chang-zheng XIE Bing-ruo
|
| Abstract: |
| A novel single-phase parallel active power filter based on the harmonic magnetic flux compensation theory is proposed.The primary winding of the transformer is connected with the harmonic load in parallel and the secondary winding with PWM(Pulse Width Modulation) inverter.According to the analysis of the voltage equations for the primary side of transformer,when the harmonic current,which is proportional to that of primary winding,is injected to the secondary winding by the inverter,the primary winding of transformer exhibits nearly zero impedance to the harmonic current and great excitation impedance to the fundamental current,and the harmonic current is thus flowing into transformer branch.The mathematical system model is established for system stability analysis and steady state error estimation.The filtering effectiveness of this simple and reliable active power filter is proved by experiment results. |
| Key words: active power filter,transformer,magnetic flux compensation,mathematical model |
