Designing method of MMC multi-sub-module user-defined integrated component

A technology of integrated components and design methods, applied in the design field of MMC multi-sub-module custom integrated components, can solve the problems of inability to realize sub-module fault simulation, large workload of model building, large amount of data, etc.

Active Publication Date: 2014-12-10
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

The existing equivalent model has a big problem in realizing the sub-module blocking state, and the failure simulation of the sub-module cannot be realized, and the equivalent model has not b

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  • Designing method of MMC multi-sub-module user-defined integrated component

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Embodiment Construction

[0054] The preferred embodiments will be described in detail below in conjunction with the accompanying drawings. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.

[0055] figure 1 It is a flow chart of the design method of the MMC multi-submodule self-defined integrated component provided by the present invention. Such as figure 1 As shown, the design method of the MMC multi-submodule self-defining integrated component provided by the present invention comprises:

[0056] Step 1: Determine the equivalent state and equivalent model of each sub-module, and combine the equivalent models of each sub-module into Thevenin equivalent model.

[0057] MMC three-phase upper and lower bridge arms are composed of multiple sub-modules connected in series with current-limiting inductors, such as figure 2 shown. The structure diagram of the sub-module is as follows image 3 As shown, eac...

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Abstract

The invention discloses a designing method of an MMC multi-sub-module user-defined integrated component in the technical field of electric power system operation and control. The method comprises the steps that the equivalent state and the equivalent model of each sub-module are determined, and the equivalent models of the sub-modules are combined into a Thevenin equivalent model; the equivalent state of a sub-module in a locking state is corrected; the fault types of the sub-modules are set, and the equivalent models of the sub-modules are corrected according to the fault types of the sub-modules; and compiling of the sub-modules is achieved in electromagnetic transient simulation software PSCAD is achieved. The shortcomings that according to an existing sub-module equivalent model, workload is large when a large-scale MMC system is established are overcome, equivalence of the sub-module locking states is achieved, and the problem that an existing equivalent model cannot set a failure is solved.

Description

technical field [0001] The invention belongs to the technical field of power system operation and control, and in particular relates to a design method of an MMC multi-submodule self-defined integrated component. Background technique [0002] High Voltage Direct Current (HVDC) using Voltage Source Converter (Voltage Source Converter, VSC) and Pulse-width Modulation (PWM) technology has become a new trend in the development of voltage source HVDC transmission. . Compared with the traditional 2-level and 3-level topologies, the Modular Multilevel Converter (MMC) has become a research hotspot of domestic and foreign scholars due to its technical advantages after being proposed. Its modular structure makes it highly scalable, with high output levels, and overcomes the problems of high switching frequency, large output voltage harmonics, low voltage level, and the space occupied by the converter station in traditional voltage source converters. Disadvantages such as large area ...

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Application Information

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IPC IPC(8): G06F17/50G06F9/455
Inventor 刘崇茹林周宏洪国巍郭龙
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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