Distributed recording management system for smart grid

Abstract

A distributed recording management system for a smart grid in the technical field of electric power engineering comprises a plurality of station level storage sub-systems positioned at a transformer station end, a network level information retrieving sub-system positioned at a scheduling end and a plurality of electric power optical fiber channels or carrier channels which connect the plurality of station level storage sub-systems and the network level information retrieving sub-system. The distributed recording management system utilizes distributed storage technology to establish two stages of information retrieval libraries at the scheduling end and the transformer station end and store recording files in transformer stations in the whole grid in a scattering way, which lowers the risk of centralized storage, improves the transmission efficiency of recording data, saves the bandwidth of a monitoring network, improves the utilization ratio of information and increases the recovery speed of the grid after a fault.

Description

technical field [0001] The invention relates to a system in the technical field of electric power engineering, in particular to a distributed wave recording management system for smart grids. Background technique [0002] In the smart grid, digital substations begin to use digital wave recorders. Compared with traditional wave recorders, digital wave recorders have stronger processing capabilities, higher sampling rates, and more accurate wave recording, resulting in doubled wave recording data. increase, the need for strong management of wave recording data. In the current power system, the management of wave recording data is integrated in the fault information system, and the wave recording data is managed in the form of files. Collect and store the wave recording files in the station, and at the same time transmit the wave recording files of this station to the information master station; the information master station stores and manages the wave recording files of all ...

AI Technical Summary

Problems solved by technology

[0003] There are several problems in this wave recording data management scheme: (1) The storage redundancy is large, and the same record wave data is stored and managed separately in the substation and dispatching, which increases the investment cost and maintenance cost, and increases the difficulty of maintenance; 2) When analyzing power faults, only the sampling data of several cycles before and after the fault interval is needed, and the required data volume is only a few hundred K, but the wave recording file contains sampling data of hundreds of cycles at multiple intervals, and it takes several M, more than a dozen M, the utilization rate of information is low; (3) When a station fails, the adjacent substation often records waves at the same time. At present, the system uploads and dispatches all the recorded files, which increases the network burden and is not practical; (4) It takes a long time to upload the recording file to the dispatcher, which cannot meet the timeliness requirements. At the same time, it competes with the monitoring system for communication bandwidth, which affects the real-time performance of the monitoring system. (5) Using the recording data based on the recording file has poor scalability. , high system maintenance cost

Images