Communication system of cascaded converter module unit and control method thereof

A module unit and communication system technology, applied in transmission systems, electromagnetic wave transmission systems, electrical components, etc., can solve the problems of complex protocol stack, low communication code rate, and difficult implementation.

Active Publication Date: 2020-10-23
NR ELECTRIC CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The traditional packet communication frame encapsulation method has problems such as slow response speed and difficult implementation due to the shortcomings of multiple layers of communication protocol enca

Method used

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  • Communication system of cascaded converter module unit and control method thereof
  • Communication system of cascaded converter module unit and control method thereof
  • Communication system of cascaded converter module unit and control method thereof

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Experimental program
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Embodiment Construction

[0024] The technical solutions and beneficial effects of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0025] The present invention provides a communication system for cascaded converter module units, the topological diagram of which is as follows figure 1 As shown, it includes a data sending module and a data receiving module, wherein the data sending module is provided with one analog input port and several semaphore ports, wherein the analog input port is used to transmit analog data such as voltage or current, signal The quantity port is used to transmit signal quantities such as over-temperature fault, IGBT fault, and over-voltage fault. In the present invention, the single-channel optical fiber is composed of two optical fibers for transmitting and receiving, and the voltage analog quantity, fault signal quantity and control command transmitted in the optical fiber are realized by double encoding of frequency and...

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Abstract

The invention discloses a communication system of a cascaded converter module unit and a control method of thereof. The communication system comprises a data sending module and a data receiving module; if no fault occurs, the data sending module sends a frequency coding signal of an analog quantity to the data receiving module; if a fault occurs, each semaphore is connected with a corresponding frequency generator through a D trigger, the semaphore frequency with the highest priority is selected and sent to a multiplexer according to priorities among different semaphore, and the semaphore frequency is sent to a data receiving module through an optical fiber sending interface circuit; and the data receiving module searches and determines a specific instruction value in the state table according to the control instruction frequency, and then performs connection to the corresponding switching device. According to the technical scheme, compared with a traditional packet communication framepackaging mode, the logic is simpler, and compared with a traditional serial communication mode, the transmission speed is higher; the influence caused by high-voltage electromagnetic interference isovercome to the greatest extent, and the expansibility is good.

Description

technical field [0001] The invention belongs to the technical field of application of communication technology in power systems, and in particular relates to a modular unit optical fiber communication system of cascaded converters and a control method thereof. Background technique [0002] Due to the high voltage level and large rated capacity of the cascaded converter, the overall operating environment of the system is relatively complex, so there is relatively large electromagnetic interference in the actual operation process. On the other hand, due to the high power of its power module, when it fails, it will have a significant impact on the output of the cascaded converter. Therefore, no matter from the perspective of system reliability or equipment stability, it is necessary to have the ability to quickly respond to faults. The traditional packet communication frame encapsulation method has problems such as slow response speed and difficult implementation due to the sho...

Claims

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Application Information

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IPC IPC(8): H04B10/508H04B10/516H04B10/60
CPCH04B10/508H04B10/516H04B10/60
Inventor 吴小丹
Owner NR ELECTRIC CO LTD
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