Digital signal processor (DSP)-based staggered single-phase space vector pulse modulation gridding device

Abstract

The invention discloses a digital signal processor (DSP)-based staggered single phase space vector pulse modulation gridding device. The device comprises a space vector pulse modulation device, a staggered control device and a control unit, wherein the control unit comprises a DSP control unit; the space vector pulse modulation device is a single-phase space vector pulse modulation device; and all bridge circuits of the staggered control device are staggered and operated in parallel according to a 360 DEG / N of phase at the same frequency, wherein N (N is more than or equal to 2) is the number of the current parallel circuits. The device adopts a DSP staggered single-phase space vector pulse width modulation (SVPWM) technology, facilitates digitized management, reduces device volume, has a compact circuit structure, improves the dynamic performance of power supplies, optimizes switch times, reduces switch loss and improves the utilization rate of (direct current) DC voltage. The inverter technology is superior to the conventional inverter technology, is suitable for the inversion of new energy and grid power generation, and has higher harmonic suppression capability and a wide application prospect.

Description

technical field [0001] The invention relates to the field of inverters, in particular to inverters using interleaved single-phase space vector pulse modulation grid-connected technology controlled by DSP. The inverters are usually used to incorporate direct current generated by green energy such as solar energy into mains network. Background technique [0002] The traditional inverter technology has the disadvantages of slow dynamic response, low utilization rate of DC voltage, low switching frequency, large volume and complicated circuit structure. [0003] DSP interleaved single-phase SVPWM (Space Vector PulseWidth Modulation) grid-connected technology is adopted, which is easy for digital management, reduces the size of the device and compact circuit structure, and can improve the dynamic performance of the power supply, optimize the switching times, and reduce switching losses , Improve DC voltage utilization. This inverter technology is superior to traditional inverte...

AI Technical Summary

Problems solved by technology

[0012] At present, there are only three-phase SVPWM grid-connected inverter devices, and there is no single-phase SVPWM grid-connected inverter device. In addition, the processors used in SVPWM grid-connected inverter devices currently use MCUs. It has advantages in process control and other aspects, but it is not as good as DSP in numerical calculation, and the most important work of the processor here is numerical calculation.

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