摘要
针对独立小供电系统中发生的并联的校正电容器和电网阻抗之间的谐振现象,此处首先分析了在谐振状况时并联型有源电力滤波器(SAPF)在传统控制策略下检测负载电流的两种方式,分析表明,当检测点设立在非线性负载出口处时方案最优。接着分析了最优检测点下SAPF的谐波补偿和谐振阻尼效果,虽然在该方案下SAPF对非线性负载的谐波具有补偿效果,对谐振引起的谐波放大也有抑制效果,但该种传统控制策略下的阻尼效果并不能使谐波成分满足电能质量标注的要求。因此,这里提出了一种新型复合谐波补偿和谐振阻尼策略,在补偿谐波的同时能阻尼谐振,可以满足电能质量标注的要求。最后给出了实验结果。
Aiming at the resonance phenomenon between the parallel correction capacitor and the grid impedance in the small and independent power supply system,the two methods of detecting the load current of the shunt active power filter(SAPF)under the traditional control strategy in the resonance condition are analyzed firstly.The result shows that the scheme is optimal when the detection point is set at the nonlinear load outlet.Then the capability of SAPF to compensate harmonic and damp resonance under the optimal detecting is discussed,although SAPF has a compensation effect on the harmonics of nonlinear loads and a suppression effect on the harmonic amplification caused by resonance under this scheme,the damping effect under this traditional control strategy can not make the harmonic components meet the requirements of power quality labeling.Therefore,a new hybrid harmonic compensation and resonance damping strategy is proposed,which can compensate harmonics and damp resonance at the same time,which can meet the requirements of power quality labeling.Finally,the experimental results are given.
作者
李宝华
俞斌
LI Bao-hua;YU Bin!(Nanjing University of Information Science&Technology,Wuxi 214105,China)
出处
《电力电子技术》
2024年第3期52-55,67,共5页
Power Electronics
基金
国家自然科学基金(51462109)。
关键词
滤波器
谐振阻尼
谐波补偿
filter
resonance damping
harmonic compensation
