The invention provides an anti-interference tracking
control system and a control method thereof for the compensating current of an
active power filter, and belongs to the field of
inverter current tracking and control. The
system comprises a
voltage reference circuit, a D / A conversion circuit, an A / D conversion circuit, a synchronous sampling and holding circuit, a network-side
voltage zero-crossing detection circuit, a gate driving pulse circuit, a current detection
signal conditioning circuit, a DSP
control unit and a storage unit. The
system integrates a high-performance
digital signal processor with the advanced linear self-disturbance rejection
control algorithm, so that the control precision and the
control effect are greatly improved. The rapid real-time tracking of the compensating current on the directive current can be realized. According to the technical scheme of the invention, the following five technical effects are realized. Firstly, the
system is simple in
hardware structure and convenient to operate. Secondly, the DSP is powerful in
digital signal processing capability, fast in execution speed, and good in real-time performance. Thirdly, the advanced linear self-disturbance rejection control strategy enables the tracking control of the compensating current to be more accurate and more accurate, so that the effect is better. Fourthly, the system is better in anti-interference performance. Fifthly, the active filtering performance is improved.