【摘要】 有源电力滤波器提供了一种很好的滤除谐波电流的方法,它是通过产生一定量的电流去补偿由非线性负荷引起的谐波电流。针对目前有源滤波器系统的下位机与工控机通常利用RS232或RS485进行数据传输时存在传输速度慢和实时性差的情况,提出了采用具有数据吞吐量大和数据传输率高等特点的PCI总线来实现通讯设计。实践表明基于PCI总线的DSP控制电路不仅提高了数据通讯的速度,而且提高了系统控制板卡的可靠性。更多还原

【Abstract】 With the development of modern industry,power load becomes more and more complex,and harmonic current in power system is time-varying.The traditional passive filter(PF) can’t satisfy the needs of modern industry and power system.Active power filter(APF) offers a kind of important way for harmonic suppression.Harmonic current is offset by injecting certain amount of compensation current,which can compensate harmonic current produced by nonlinear load and meet impedance and frequency change automatically.The present APF using RS232 or RS485 in data transmission has low speed and poor on-line response characteristics.According to this,the paper proposes PCI bus in communication,which has the characteristics of great data throughput and higher speed.It is proved by practical application that DSP control circuit based on PCI bus can not only increase the speed of data communication,but also the reliability of the system.更多还原