Multidimensional modeling method and simulation method for modular multilevel converter

A modular multi-level, multi-level converter technology, applied in the fields of instruments, electrical digital data processing, special data processing applications, etc., can solve the problems of inability to take into account simulation efficiency, transient analysis, accuracy, etc. Effects of Simulation Efficiency
CN105045952AActive Publication Date: 2015-11-11XJ ELECTRIC +1
4 Cites 15 Cited by

Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
XJ ELECTRIC
Publication Date
2015-11-11

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The present invention relates to a multidimensional modeling method and a simulation method for a modular multilevel converter, comprising steps of: (1) establishing equivalent models of half-bridge submodules and establishing Thevenin equivalent models of submodules according to the Thevenin's Equivalence Theorem; cascading the Thevenin equivalent models of submodules to establish a high-speed equivalent model of a modular multilevel converter; (2) acquiring stray parameters, putting a stray capacitor and a stray resistor at corresponding positions in the high-speed equivalent model established in step (1), to establish a wide frequency model of the modular multilevel converter; and (3) replacing a submodule of each bridge arm of the wide frequency model established in step (2) with a detailed electromagnetic transient model, to establish a multidimensional model of the modular multilevel converter. The present invention can not only greatly improve the efficiency of system simulation and realize device-level electromagnetic transient analysis, but also simulate the effects of stray elements on system operation so as to facilitate efficient and accurate simulation analysis of the modular multilevel converter.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a multi-dimensional modeling method and simulation method for a modular multi-level converter. Background technique

[0002] With the development of fully-controlled power electronic devices and the application of power electronic technology in power systems, the flexible DC transmission technology based on voltage source converters has been paid more and more attention. Modular multi-level converter is a kind of voltage source converter in the application of flexible direct current transmission system. It is composed of multiple half-bridge sub-modules connected in a certain way. By separately controlling the input of IGBT components of each sub-module The cut-off state makes the AC voltage output by the converter close to a sine wave, realizing efficient energy transmission.

[0003] Due to the high number of levels of the modular multilevel converter, the system requires more components. Based on the detailed electromagneti...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More