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Method for compensating delay of MMC digital-analog hybrid simulation power interface

A digital-analog hybrid, power interface technology, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of system instability, affecting the accuracy of the simulation system, and asynchronous electrical signal transmission.

Active Publication Date: 2017-01-04
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +2
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Problems solved by technology

[0003] For the flexible DC transmission digital-analog hybrid simulation system, due to the introduction of power interface equipment, there will be a certain hardware delay in the simulation system, which will lead to asynchronous transmission of electrical signals on both sides
Hardware delay not only affects the accuracy of the simulation system, but also leads to system instability in severe cases

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  • Method for compensating delay of MMC digital-analog hybrid simulation power interface

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Embodiment Construction

[0055] The present invention will be further described in detail below in conjunction with the drawings.

[0056] Such as figure 1 , MMC digital-analog hybrid simulation circuit includes digital simulation device, physical analog device (MMC) and MMC digital-analog hybrid simulation power interface. Among them, the physical simulation device is the converter valve equipment of flexible direct current transmission, and the digital simulation device is the real-time digital simulation equipment of the power system. Connect the digital side device and the physical side device through voltage-type power amplifiers, A / D converters, and D / A converters, so that many physical devices with power electronic devices and high control complexity can be flexibly simulated . Here, the voltage type ideal transformer algorithm is used to decouple the MMC digital-analog hybrid simulation power interface. The voltage signal on the digital side is amplified by the D / A converter, voltage type power...

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Abstract

The invention provides a method for compensating delay of an MMC digital-analog hybrid simulation power interface. A delay compensation module is added into a first MMC digital-analog hybrid simulation power interface, and then the stability and the accuracy of an MMC digital-analog hybrid simulation power interface achieved by decoupling based on the voltage type ideal transformer algorithm. An MMC digital-analog hybrid simulation equivalent model working in an STATCOM mode is established in electromagnetic transient simulation software PSCAD / EMTDC, and off-line simulation verification is performed. The verification result shows that the delay compensation method is effective, provides an instructive reference for the stability of digital-analog hybrid simulation power interfaces based on actual MMC converter valve devices in laboratory, and can technically support theoretical analysis on an actual flexible direct current power transmission project.

Description

Technical field [0001] The technical field of digital-analog hybrid simulation of the present invention specifically relates to a method for compensating the delay of MMC digital-analog hybrid simulation power interface system. Background technique [0002] Power Hardware in-the-Loop (PHIL) is also known as power-type digital-analog hybrid simulation. This technology refers to the combination of real-time digital simulation equipment and the physical simulation device under test, according to a certain interface algorithm and use The power interface device connects the two. Digital-analog hybrid simulation can complement the advantages of traditional digital simulation and physical simulation, and can provide technical support for scientific research innovation and engineering application of large-scale multi-node flexible direct current transmission technology (MMC-HVDC) in the future. Digital-analog hybrid simulation technology overcomes the shortcomings that traditional simul...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 谷怀广刘栋贺之渊吴学光朱琳林畅寇龙泽
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD