Communication framework and method suitable for modularized multi-level converter control system

Abstract

The invention provides a communication framework and method which are suitable for a modularized multi-level converter control system. The framework comprises an optical fiber communication board card of valve base control equipment (VBC), an optical transceiver module of the optical fiber communication board card, converter control submodule units (SMC) as well as optical transceiver modules and optical fiber channels of the converter control submodule units, wherein one VBC is provided with at least one optical fiber communication board card provided with at least one optical transceiver module; the optical fiber channel is used for realizing the information transmission between the VBC and the SMCs and/or the information transmission between the SMCs. In addition, the invention also provides two communication methods using the communication framework. The communication framework and method solve the problems brought as the number of VBC optical fiber communication ports and the number of the SMCs are not matched in the modularized multi-level converter control system, the software and hardware design complexity of the system is reduced and the framework can be suitable for a high-voltage large-capacity flexible direct system with a larger SMC number by flexible extension.

Description

technical field [0001] The invention relates to the communication field of a converter control system, in particular to a communication framework and a communication method of a modular multilevel converter control system. Background technique [0002] High-voltage flexible DC transmission systems are especially suitable for long-distance power transmission, wind power grid integration, submarine power transmission and other applications. Compared with AC transmission and traditional DC transmission, it has its unique advantages. In the high-voltage flexible DC transmission system based on modular multilevel converters, the converter valve is composed of many cascaded sub-modules, and the number of cascaded sub-modules in one bridge arm can reach hundreds. The number of sub-modules can reach thousands, and the higher the voltage level, the more the number of sub-modules. Each sub-module has a converter control sub-module unit (SMC) for control and monitoring, so there are h...

AI Technical Summary

Problems solved by technology

[0003] The current communication architecture application form is mainly a point-to-point communication between an optical transceiver module of VBC and an SMC module, which is not conducive to the realization of a flexible straight system with a larger capacity. It must be solved by increasing the number of VBC optical transceiver modules and increasing the design of VBC Difficulty and fiber cost etc.

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