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A real-time simulation method for modular multilevel converters suitable for fpga

A multi-level converter, modular multi-level technology, applied in the direction of CAD circuit design, special data processing applications, etc., can solve the problems of loss of simulation accuracy, parallelism to be improved, etc., to achieve convenient implementation and shorten calculation delay time, the effect of small simulation step size

Active Publication Date: 2021-07-27
SHANGHAI JIAOTONG UNIV
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  • Application Information

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Problems solved by technology

However, the simulation experiment platform needs to convert floating-point numbers to fixed-point numbers for calculation when performing addition and accumulation operations, which loses part of the simulation accuracy. needs improvement

Method used

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  • A real-time simulation method for modular multilevel converters suitable for fpga
  • A real-time simulation method for modular multilevel converters suitable for fpga
  • A real-time simulation method for modular multilevel converters suitable for fpga

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Embodiment

[0051] This embodiment provides a method for real-time simulation of a modular multilevel converter suitable for FPGA, including the following steps:

[0052] Step 1. Decouple the main circuit of the multilevel converter from the peripheral circuit according to the transmission line method, and establish the equivalent model of the bridge arm of the multilevel converter based on the alternative circuit to simulate the main circuit of the modular multilevel converter ; Decompose the calculation of the model into four modules: sub-module updating module, sub-module merging module, bridge arm interface calculation module, bridge arm equivalent circuit updating module;

[0053] Step 2, establishing a communication link between the FPGA and the server;

[0054] Step 3, establishing a communication link between the FPGA and the peripheral circuit simulation system;

[0055] Step 4, establishing a communication link between the FPGA and the external controller;

[0056] Step 5: The...

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Abstract

The present invention proposes a real-time simulation method for modular multilevel converters suitable for FPGA, and realizes real-time simulation calculation on FPGA of the decoupled modular multilevel converter circuit according to the equivalent circuit model of the bridge arm . Using the characteristics of no coupling between the sub-module equivalent calculation process and the bridge arm equivalent inductance calculation process in the alternative bridge arm equivalent circuit model, the parallel calculation steps are realized; at the same time, a dedicated floating-point number accumulation circuit is designed to handle the sub-module series combination process , realizing the accumulation of sub-module voltage and resistance data with floating-point precision, ensuring that high calculation accuracy can be obtained while meeting the hardware resource constraints of the FPGA platform. The system framework of the invention is clear and clear, the control logic is simple and effective, and the realization is convenient, and is suitable for the real-time simulation calculation of the electromagnetic transient state of the modularized multilevel converter on a parallel architecture platform such as FPGA.

Description

technical field [0001] The present invention relates to the field of electromagnetic transient real-time simulation technology and the field of hardware acceleration, in particular to a modular multi-level converter (ModularMulti-level Converter, MMC) suitable for a programmable gate array (Field Programmable Gate Array, FPGA) The real-time simulation method of electromagnetic transient state. Background technique [0002] Modular multilevel converters are widely used in medium and high voltage applications in power networks due to their advantages such as low harmonics, low switching frequency, high modularity and good scalability. By cascading multiple sub-modules, it can superimpose and output high voltage, and it also has the characteristics of less output harmonics and high modularity, so it has a wide application prospect in power systems. Compared with the traditional two-three-level HVDC transmission system based on Voltage Sourced Converter (VSC), the modular multi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/34
CPCG06F30/331
Inventor 贺光辉李雄飞
Owner SHANGHAI JIAOTONG UNIV
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