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

A modular multi-level, control system technology, applied in the direction of electrical program control, comprehensive factory control, AC power input conversion to DC power output, etc., can solve the problems of increasing the difficulty of VBC design and the cost of optical fiber, unfavorable flexible straight system, etc. , to simplify design difficulty, ensure system performance, and reduce design and construction costs
CN103869779AInactive Publication Date: 2014-06-18NR ELECTRIC CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NR ELECTRIC CO LTD
Publication Date
2014-06-18
Estimated Expiration
Not applicable · inactive patent

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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.
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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...

Claims

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