Modeling method for dynamic model of modular multi-level convector

A modular multi-level, dynamic model technology, applied in the direction of converting irreversible DC power input to AC power output, instruments, electrical digital data processing, etc. Internal component status information and other issues

Active Publication Date: 2013-05-29
CHINA EPRI SCIENCE & TECHNOLOGY CO LTD +2
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Problems solved by technology

The model built by the topology modeling method directly reflects the circuit topology, and the complexity increases significantly with the increase of the number of switching devices; the output modeling method usually equivalents the device to a controlled source or imp

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  • Modeling method for dynamic model of modular multi-level convector
  • Modeling method for dynamic model of modular multi-level convector
  • Modeling method for dynamic model of modular multi-level convector

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Embodiment Construction

[0144] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0145] A method for modeling a dynamic model of a modular multilevel converter, the method comprising the following steps:

[0146] Step 1: Establish the switching period average model of the single sub-module of the upper bridge arm and the small-signal AC model of the single sub-module of the upper bridge arm;

[0147] Step 2: Establish the switching period average model of the upper bridge arm and the small signal AC model of the upper bridge arm;

[0148] Step 3: Establish the cycle average model of the switch of the lower bridge arm and the small signal AC model of the lower bridge arm;

[0149] Step 4: Establish the switching period average model of the modular multilevel converter and the small signal model of the modular multilevel converter.

[0150] like Figure 1-Figure 2 , the modular multilevel converter includes three pairs of bridge arms, ea...

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Abstract

The invention provides a modeling method for a dynamic model of a modular multi-level convector. The method comprises the following steps of establishing an upper bridge single submodule switch period average model and an upper bridge arm single submodule small signal communication model; establishing an upper bridge arm switch period average model and an upper bridge arm small signal communication model; establishing a lower bridge arm switch period average model and a lower bridge arm small signal communication model; establishing a lower bridge single submodule switch period average model and a lower bridge arm single submodule small signal communication model; and establishing a modular multi-level convector switch period average module and a modular multi-level convector small signal module. The established dynamic model of the modular multi-level convector facilitates analysis on a dynamic property and a frequency response characteristic of the modular multi-level converter, facilitates cascade control strategy design of the device, and achieves description of internal state quantity.

Description

technical field [0001] The invention belongs to the technical field of electric power system transmission, and in particular relates to a dynamic model modeling method of a modular multilevel converter. Background technique [0002] In 2002, R.Marquart and A.Lesnicar of the Bundeswehr University in Munich, Germany jointly proposed a new modular multilevel voltage source converter. In 2004, a 17-level 2MW prototype was successfully developed. In 2009, the B4.48 working group of the International Large Power Grid Conference officially named it a modular multilevel converter (MMC). This topology constitutes a converter valve through sub-modules connected in series. It has high modularity, small harmonic distortion, and low switching loss. It is suitable for high-voltage and high-power applications and has broad application prospects. It can be used for flexible DC transmission and unified power flow control. Various flexible DC power transmission and flexible AC power transmi...

Claims

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Application Information

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IPC IPC(8): G06F19/00H02M7/49
Inventor 戴朝波王轩李欣闫殳裔喻劲松王广柱刘隽
Owner CHINA EPRI SCIENCE & TECHNOLOGY CO LTD
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