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A control method of mmc control system state machine based on can bus protocol

A CAN bus and control system technology, applied in the field of multi-module power supply systems, can solve problems such as high cost, complex structure, and inapplicability

Active Publication Date: 2021-05-11
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Application Information

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Problems solved by technology

However, this interactive technology has a complex structure and high cost, and is not suitable for some medium and low-cost applications

Method used

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  • A control method of mmc control system state machine based on can bus protocol
  • A control method of mmc control system state machine based on can bus protocol
  • A control method of mmc control system state machine based on can bus protocol

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Embodiment Construction

[0022] The technical solutions and beneficial effects of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0023] The present invention provides a kind of modular multilevel converter (Modular MultilevelConverter, MMC) control system state machine based on CAN bus protocol, comprising:

[0024] A. The main control system state machine (main control state machine) implanted in the main control system, the sub-module control system state machine (sub-module state machine) implanted in the control system of each sub-module;

[0025] B. According to the operating state of the MMC main circuit, the main control state machine includes a variety of working states, and according to the operating state of the sub-module, the sub-module state machine also includes a variety of working states;

[0026] C. The state switching of the main control state machine is determined by the following factors: the command data frame of the host c...

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Abstract

The invention discloses a MMC control system state machine based on the CAN bus protocol, including a main control state machine implanted in the main control system and a sub-module state machine implanted in the control system of each sub-module, according to the operation of the MMC main circuit State, the main control state machine includes a variety of working states, according to the operating state of the sub-module, the sub-module state machine also includes a variety of working states. This technical solution can help users expand the additional functions of the system more quickly in complex application scenarios while reducing MMC's demand for control system hardware and software resources, thereby further improving the performance of MMC, with low cost, high efficiency and stability, etc. features. The invention also discloses a control method of the state machine of the MMC control system based on the CAN bus protocol.

Description

technical field [0001] The present invention relates to power systems, and more particularly to multi-module power systems for use in modular multilevel converters and the like. Background technique [0002] Modular Multilevel Converter (MMC) is used in high-voltage flexible DC transmission, active filter, reactive power compensator, motor drive and other fields. MMC is different from the traditional single topology power supply. It is a complex multi-module power supply system, which is composed of a large number of sub-modules and their control systems, main control systems, circuit breakers, cables and inductors. Among them, the interaction technology between the main control system and the sub-module control system is the key to the stable operation of MMC. At present, most MMCs usually use Ethernet-based multi-level interaction methods to realize the interaction between the main control system and the sub-module control system. However, this interactive technology has...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/042H04L12/40
CPCG05B19/0423G05B2219/21063H04L12/40006H04L2012/40215
Inventor 王楚扬肖岚蒋慧杰王楚娇
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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