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PSCAD (Power Systems Computer Aided Design) interface and C language based MMC (Modular Multilevel Converter) transient simulation method

A transient simulation, C language technology, applied in software simulation/interpretation/simulation, program control devices, etc., can solve the problems of complex programming, many format restrictions, slow operation speed, etc.

Inactive Publication Date: 2015-12-16
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In practical application, Matlab is easy to use and easy to program, but it has low efficiency of code execution and slow calculation speed when interfaced with PSCAD / EMTDC; C programming language is rich in functions, widely used, strong in expressive ability, high in target program efficiency, and good in portability , professional and technical personnel basically master its programming skills; Fortran language has high numerical calculation efficiency, but the programming is complicated and the format is more restricted, so it is seldom used by general engineering and technical personnel

Method used

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  • PSCAD (Power Systems Computer Aided Design) interface and C language based MMC (Modular Multilevel Converter) transient simulation method
  • PSCAD (Power Systems Computer Aided Design) interface and C language based MMC (Modular Multilevel Converter) transient simulation method
  • PSCAD (Power Systems Computer Aided Design) interface and C language based MMC (Modular Multilevel Converter) transient simulation method

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Embodiment Construction

[0041] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solutions of the present invention more clearly, and cannot be used to limit the protection scope of the present invention.

[0042] like image 3 As shown, the MMC transient simulation method based on PSCAD interface C language includes the following steps:

[0043] Step 1: Use PSCAD / EMTDC to model the MMC-related primary system, model the MMC converter control logic (including outer loop power control, inner loop current control, etc.), and set voltage and current measurement points.

[0044] Step 2: Using the model components that come with PSCAD / EMTDC, according to the principle of nearest level approximation modulation, the inner loop current controller based on dq decoupling generates the voltage modulation signal V rfe , to determine the number of sub-modules that the upper and lower bridge arms tr...

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Abstract

The invention discloses a PSCAD (Power Systems Computer Aided Design) interface and C language based MMC (Modular Multilevel Converter) transient simulation method. The method comprises: step 1, performing MMC related primary system modeling, performing MMC converter control logic modeling, and setting voltage and current measurement points; step 2, utilizing model components of PSCAD / EMTDC (PSCAD / Electromagnetic Transients including DC) to determine the number of sub-modules used in triggering upper and lower bridge arms in each phase unit of an MMC; step 3, utilizing a C language to construct a capacitor voltage balance control function for the sub-modules; and step 4, utilizing a Fortran language to write a PSCAD / EMTDC interface program, and calling the capacitor voltage balance control function to realize MMC transient simulation. The method is capable of realizing simulation of the MMC and a control function of the MMC, and can be conveniently used for constructing a flexible direct-current transmission simulation system.

Description

technical field [0001] The invention relates to an MMC transient simulation method based on PSCAD interface C language, in particular to a MMC electromagnetic transient simulation method based on PSCAD / EMTDC interface C language, belonging to the field of power system automation. Background technique [0002] With the development of high-voltage and high-power fully-controlled power electronic devices (IGBT), flexible AC and flexible DC transmission technology is widely used in the field of power transmission and distribution. It is the most representative technology in the field of smart grid. More and more applications. Compared with conventional DC transmission technology, flexible DC transmission technology has good control performance and is the latest generation of DC transmission technology. Flexible AC Transmission System (FACTs) applies power electronic technology to realize rapid control of transmission grid, improve grid transmission capacity and safety and stabi...

Claims

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Application Information

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IPC IPC(8): G06F9/455
Inventor 李鹏黄浩声袁宇波王业孔祥平林金娇
Owner STATE GRID CORP OF CHINA
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