Double-DSP (digital signal processor) control system based on chained SVG (scalable vector graphics)

Abstract

The invention discloses a double-DSP (digital signal processor) control system based on a chained SVG (scalable vector graphics). The double-DSP control system comprises a double DSP and an FPGA (field programmable gate array), wherein the double DSP is used for carrying out functional division according to a primary DSP and an auxiliary DSP, reading voltage and current information from the DSP, executing a core algorithm, calculating modulation wave information and providing the modulation wave information to the FPGA, wherein the FPGA is used for carrying out analog quantity sampling, so as to generate PWM (pulse-width modulation) pulse signals; and coding the PWM signals, transforming the coded PWM signals into optical signals to be transmitted into a corresponding power module, wherein the primary DSP is used for acquiring the state of the power module and the state of an external switch, and carrying out logic control and command transmission on the states. With the adoption of the double DSP control system based on the chained SVG, the double DSP+FPGA is adopted as a hardware core of a control platform; reasonable control software design is carried out by aiming at control requirements of the chained SVG on such basis; corresponding functional modules are designed according to the advantages of different CPUs (central processing units); data exchange and processing are carried out on the functional modules through an internal memories, buses and the like; the whole control system is compact in structure, rapid and effective in running.

Description

technical field [0001] The invention relates to a chained SVG-based dual DSP control system, which belongs to the application field of power electronics technology. Background technique [0002] As social production and life have higher and higher requirements for power quality, the research and application of reactive power compensation technology has received more and more attention. At present, the main circuit topologies of high-voltage reactive power compensation devices mainly include diode-clamped multi-level, flying capacitor-type multi-level and chain-type H-bridge multi-level topology. High switching frequency, low-voltage IGBT with mature technology and low price as the main power device, modular structure design, easy to achieve redundancy and many other advantages have been widely used. [0003] The SVG device adopts chain H-bridge topology structure, and realizes high voltage output through series connection of low-voltage power modules. A set of SVG device is...

AI Technical Summary

Problems solved by technology

The electrical structure of the multi-level controller is adopted, and its computing power can meet the control requirements of the chain-type high-voltage static var generator, but whether it adopts the structure of the main controller + phase-splitting controller, or the main CPU board + slave pulse generator The structure of the version, its control system is relatively complex, the rapidity and reliability of data exchange between the master and slave controllers has a great impact on the performance of the whole device; the practice of adding phase-shifting transformers to the incoming line and canceling the harmonic detection function , which avoids the calculation requirements of power module DC bus stability control and harmonic detection, but its disadvantages are obvious, the cost of system hardware increases, the power circuit and wiring are complicated, and the device function is relatively simple

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