有源电力滤波器在剧场中的应用

Application of Active Power Filter in the Theater

剧场电气系统中,由于大量非线性负荷的应用,谐波污染问题较为严重。剧场电气设备中,舞台调光装置是主要谐波源。由于可控硅调光设备在工作时产生的谐波量及谐波频谱随导通角变化而改变,传统的LC无源滤波装置不能有效治理。有源电力滤波装置具有动态补偿的特性,可以弥补这些不足。本文以施耐德电气公司的AccuSine有源滤波器为例,详细分析了有源滤波装置的工作原理及在剧场中的应用。

Harmonic pollution is relatively serious due to the application of non-linear loads in theatre electrical system. In the theatre electrical equipments, harmonic comes mainly from light-controlling device for the stage. Harmonic amount and harmonic spectrum is changing with flow angle of the thyristor light-controlling device. Traditional LC passive filter can not effectively eliminate these harmonics. Active power filter （APF） can solve the problem because APF has ability of dynamiccompensation. As an example, AccuSine APF from Schneider Electric Co. is introduced in this article, including the principle and application in the theatre.