Hybrid ring network communication model based on high-voltage chain SVG

Abstract

The invention belongs to the technical field of communication, in particular to a hybrid ring network communication model based on high-voltage chain SVG. Proposed now is the following scheme, the model comprises a high-voltage chain-type SVG control system, a power system and a high-voltage chain-type SVG main circuit connected with the high-voltage chain-type SVG control system and the power system. The high-voltage chain type SVG control system comprises an optical fiber communication module, a data transmission module and a main controller, the power system and the optical fiber communication module, the data transmission module and the main controller are connected in sequence, and a high-voltage chain type SVG main circuit is connected with the main controller and the power system. The invention further provides a hybrid ring network communication model building method based on the high-voltage chain type SVG. The number of optical cables for communication is reduced, the cost issaved, and the timeliness of communication is not reduced.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a communication model based on a high-voltage chain-type SVG hybrid ring network. Background technique [0002] The high-voltage chained SVG main circuit is in high voltage and high current, and the data exchange with the control system needs to be carried out through optical fiber. The purpose of using optical fiber is to realize high-voltage isolation and ensure the personal safety of users. The second purpose is to prevent the control system from being disturbed by the high-voltage main circuit, and provide an effective guarantee for the data exchange between the control system and the power unit. [0003] Due to the extensive use of optical fiber signal transmission, the cost of optical fiber conversion and transmission accounts for a considerable proportion of the total equipment. For example, a set of 35kV direct-mounted SVG has 126 power units. The traditional comm...

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Problems solved by technology

[0004] First, centralized and ring network methods are mainly used for communication. In centralized communication, the high-voltage chain SVG control system needs to communicate with each power unit at the same time. The real-time performance is good, but the problem is high cost (optical fiber conversion There are a lot of switches and optical fiber lines); in the ring network communication, the photoelectric converters and optical fiber lines between the SVG control system and the power unit are greatly reduced, and only 3 pairs are needed to complete the requirements of the entire system. They are placed together, the distance between adjacent modules is very close, and the distance between optical fibers is also very short, which has a cost advantage

Since the amount of real-time exchanged data between the control system and the power unit does not change in a PWM cycle, all communication data in the ring network communication structure is realized by three pairs of optical fibers controlled by the master, so a high-speed photoelectric converter is required to achieve To realize the data throughput within one PWM cycle, the cost of this ring network structure has an increase compared with the low-speed photoelectric converter of the centralized structure, but from the perspective of the total cost, the cost of the ring network communication is still more advantageous than the centralized communication of;

[0005] However, in actual use, the structure and operation mode of each high-voltage chain-type SVG main circuit are different, and the existing centralized and ring network types are difficult to achieve communication. For this reason, a hybrid ring network communication based on high-voltage chain-type SVG is needed Model

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