A substation localized distributed protection system and remote operation method

Abstract

The invention discloses a substation localization distributed protection system. The distributed protection system comprises a remote monitoring system and one or more distributed protection subsystems. The distributed protection subsystem comprises a plurality of protection devices, wherein one protection device is arranged as a communication host, and the other protection devices are arranged ascommunication sub-devices, and the communication host and the communication sub-devices communicate through a hand-held ring network. The remote monitoring system sends the remote operation preset and execution commands to the communication module of the communication host. After receiving the execution command, the communication module shares the cached preset data to the ring network module andsends the cached preset data to the communication sub-machine through the ring network, and then the communication host executes the operation. After receiving the preset data, the ring network module of the communication sub-machine executes the operation; after the operation of the communication master and slave is finished, check is performed through the constant value total CRC. The method reduces the communication flow of the station control layer, increases the network reliability, and the communication master and slave computers of the distributed protection system basically execute the operation in parallel, thereby saving the remote operation time.

Description

technical field [0001] The invention relates to the technical field of electric power system relay protection, in particular to an in-situ distributed protection system of a substation and a remote operation method. Background technique [0002] According to the planning of the new generation of intelligent substations, the on-site installation scheme of relay protection devices was proposed, and a series of on-site protection devices for lines, main transformers and busbars were developed. The in-situ protection device is based on a standardized aerial plug-in design, and the IP protection level reaches IP67, which can support unprotected installation, realize plug-and-play, factory prefabrication, centralized debugging, modular installation and replacement maintenance of the protection device, and improve work Quality and efficiency, reducing downtime. [0003] In-situ main transformer and busbar protection are mostly distributed multi-submachine device architecture, and ...

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Problems solved by technology

[0004] The purpose of the present invention is to provide an in-situ distributed protection system and remote operation method for substations, which can overcome the large communication traffic and high network delay in conventional situations, modifying fixed values, remote control soft pressure plate, switching fixed value area codes, The problem of long remote operation time such as signal reset

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