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Modelingsimulation method and device for double half bridge sub-moduleMMC

A simulation method and sub-module technology, applied in the field of power transmission and distribution

Inactive Publication Date: 2018-06-08
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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  • Application Information

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Problems solved by technology

[0005] The invention provides a method and device for modeling and simulating a double-half-bridge sub-module MMC, which solves the technical problem of modeling the double-half-bridge sub-module MMC

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  • Modelingsimulation method and device for double half bridge sub-moduleMMC

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Embodiment Construction

[0042] Embodiments of the present invention provide a method and device for modeling and simulating a dual half-bridge sub-module MMC, which solves the technical problem of modeling the dual half-bridge sub-module MMC.

[0043] In order to make the purpose, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the following The described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0044] see figure 1 , the embodiment of the present invention provides an embodiment of a double half-bridge sub-modul...

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Abstract

The embodiment of the invention discloses a modelingsimulation method and device for a double half bridge sub-moduleMMC. According to the method, equivalent processing is conducted on each device of adoublehalf bridge sub-module to respectively obtain internal nodes and external nodes of an adjoint circuitof the doublehalf bridge sub-module, branches and the nodes of theadjoint circuit are numbered to obtain a cut set network equation of the adjoint circuit, the Norton equivalent model of the doublehalf bridge sub-module is solved according to a fast nesting solution algorithm, the Thevenin equivalent model of the doublehalf bridge sub-module is obtained according to a transformation method of Norton's theorem and Thevenin's theorem, equivalence is conducted on each sub-module of the double half bridge sub-moduleMMC by simulation circuit network of the doublehalf bridge sub-module MMC, simulation is conducted bymeans of electromagnetic transient simulatiadopting the Thevenin equivalent model of the doublehalf bridge sub-module to obtain a on software to update capacitor voltage of the double half bridge sub-module, and the technical problem of modeling of the double half bridge sub-moduleMMC is solved.

Description

technical field [0001] The invention relates to the technical field of power transmission and distribution, in particular to a method and device for modeling and simulating a double-half-bridge sub-module MMC. Background technique [0002] As the number of submodules (SM) in a modular multilevel converter (MMC) is increasing due to engineering requirements, submodule topologies with various advanced functions and complex structures are emerging. [0003] The double half bridge sub-module (D-HBSM) is just such a new type of topology, which considers the parallel connection of IGBTs, not only has the level output capability of the traditional half bridge sub-module, but also can perform Local self-balancing, without increasing the number of devices, is a new topology with very broad application prospects. [0004] In order to study the electromagnetic transient characteristics of the MMC using the dual half-bridge sub-module, it is necessary to establish an equivalent model o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 朱良合骆潘钿盛超陈晓科黄辉余超耘赵成勇许建中
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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