Modularization multi-level converter real-time simulation modeling method based on onsite programmable gate array

A modular multi-level, real-time simulation technology, applied in the direction of simulators, instruments, control/regulation systems, etc., can solve the problem of limited fault types at the sub-module level, high packaging of MMC bridge arm model components, and users cannot simulate and study other Issues such as submodules of topology types

Inactive Publication Date: 2017-09-15
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

In the existing real-time digital simulator (real-time digital simulator, RTDS), the FPGA-based MMC bridge arm model components are highly packaged, and only provide simulation functions for half-bridge and full-b

Method used

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  • Modularization multi-level converter real-time simulation modeling method based on onsite programmable gate array
  • Modularization multi-level converter real-time simulation modeling method based on onsite programmable gate array
  • Modularization multi-level converter real-time simulation modeling method based on onsite programmable gate array

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Embodiment Construction

[0035] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific examples. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.

[0036] In this example, the converter station operates on the RTDS real-time simulator, and a single-ended MMC system is used to verify the modeling method designed in the present invention. Single-ended MMC converter station attached figure 1 As shown, there are 100 sub-modules in each bridge arm of MMC, and the system parameters are shown in Table 1.

[0037] Table 1 Main circuit parameters of MMC experimental system

[0038]

[0039]

[0040] In this example, the valve-level physical controller is completed by using a digital signal processor. The MMC converter station is controlled by constant active power and constant reactive power. The control targets are 400MW...

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Abstract

The invention belongs to the technical field of electric power system simulation testing and particularly relates to a modularization multi-level converter real-time simulation modeling method based on an onsite programmable gate array. According to the invention, the method comprises steps of based on the MMC working mechanism, establishing a Thevenin equivalent model of a bridge arm; using an FPGA to achieve equivalent calculation of an MMC valve group; grouping sub modules of the same bridge arm in the calculation process, wherein calculation processing is performed on each group through an FPGA production line framework; and performing synchronous parallel calculation between groups. Thus, calculation time is greatly reduced and the real-time simulation requirement is met. The beneficial effects are that flexible configuration of MMC primary parameters is achieved under the condition that the FPGA program is not modified; the method is universal to different sub module topologies; and an external controller can be connected to carry out system-level and valve-level hardware-in-the-loop experiments.

Description

technical field [0001] The invention belongs to the technical field of electric power system simulation test, and in particular relates to a method for realizing real-time simulation modeling of a modular multilevel converter by using a field programmable gate array. Background technique [0002] HVDC transmission based on modular multilevel converter (MMC) is the latest achievement in the development of flexible HVDC technology to high voltage and high power. Modular multilevel converter has become a research hotspot and has obtained more and more engineering applications due to its unique advantages such as low switching frequency, good output waveform quality, low requirement for switching consistency, and good scalability. The real-time or physical simulation of MMC is closer to the actual engineering, and can be used in the development and debugging of control and protection devices before the actual project is put into operation, which has important guiding significanc...

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Application Information

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IPC IPC(8): G05B17/02
Inventor 刘崇茹王宇徐东旭王洁聪谢国超凌博文李庚银
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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