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MMC control system state machine based on CAN bus protocol and control method thereof

A CAN bus and control system technology, applied in the field of multi-module power supply system, can solve the problems of high cost, complex structure, inapplicability, etc., and achieve the effect of low cost and high-efficiency data support

Active Publication Date: 2018-11-16
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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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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  • MMC control system state machine based on CAN bus protocol and control method thereof
  • MMC control system state machine based on CAN bus protocol and control method thereof
  • MMC control system state machine based on CAN bus protocol and control method thereof

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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 an MMC control system state machine based on a CAN bus protocol. The MMC control system state machine comprises the components of a master control state machine which is implanted into a master control system, and a sub-module state machine which is implanted into the control system of each sub-module. According to the operation state of an MMC main circuit, the mater control state machine comprises multiple working states. According to the operation state of the sub-module, the sub-module state machine also comprises multiple working states. The MMC control system state machine can reduce the requirement of the MMC for a control system software-and-hardware resource, and helps a user for more quickly expanding additional functions of the system in a complicated application scene, thereby further improving performance of the MMC, and realizing advantages of low cost, high efficiency, high stability and the like. The invention further discloses a control method of the MMC control system state machine 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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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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