Networking method of inter-station communication under hybrid multi-terminal direct-current topology

Abstract

The invention relates to a networking method of inter-station communication under hybrid multi-terminal direct-current topology and a communication monitoring mechanism generated corresponding to the method. According to the method, SDH/MSTP equipment in stations is adopted as intermediate connection equipment for realizing inter-station communication equipment interconnection, so that Ethernet private network business can be used; a connection mode according to which in-station control protection devices are connected into switches through a 100M Ethernet so as to be networked is adopted; and the SDH/MSTP equipment is connected into an SDH network. The function of the inter-station communication is to exchange control instructions and operating state information between a traditional current source converter station and a voltage source type converter station; the inter-station communication adopts a double-network mutually standby connection mode; a plurality of stations composed of the hybrid topology adopt a point-to-point connection mode; any one station can obtain the connection channels of the other stations; the connection channels are optical fiber channels; and optical cables are laid along underground cables or submarine cables between each stations.

Description

technical field [0001] The invention belongs to the field of direct current transmission, and in particular relates to a networking method for inter-station communication under a hybrid multi-terminal direct current topology. Background technique [0002] Flexible DC transmission uses voltage source converters, which can independently adjust the transmission of active and reactive power, improve the transmission capacity of the AC system, and easily form a multi-terminal DC transmission system. And other application fields, have obvious competitiveness. [0003] The hybrid multi-terminal DC topology and the laying of optical cables along with the DC cables are as follows: figure 1 As shown, taking four stations as an example, for the multi-station communication of hybrid DC, high-speed communication between any two stations is required without adding additional communication equipment in the substation. [0004] For the topology of DC converter stations at both ends, one m...

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Problems solved by technology

[0006] But this method is only suitable for point-to-point communication between two stations. For the communication between multiple stations with hybrid DC, this method not only needs to install multiple communication boards on the side of the control and protection device, but also requires multiple channel switching devices, especially To form an AB network, the number of devices and boards must be multiplied by 2, which is uneconomical and increases the complexity of the network

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