A method and device for realizing fast storage, retrieval and completion of self-describing fixed-point records of power distribution terminals

Abstract

The invention discloses a method and a device for realizing rapid storage, search and complementation for self-described fixed point records of a power distribution terminal. The method comprises the following steps: (1) electrifying the power distribution terminal, reading and analyzing a CID file stored by the device and writing data into a corresponding data list area; (2) receiving an input search condition command by the power distribution terminal and outputting a search result; (3) sending down a fixed point record calling command to the power distribution terminal according to a time slot with data missing or communication instability by a power distribution master station, calling a fixed point record file in the time slot, and carrying out corresponding conversion according to a model file, supplementing data, and redrawing a relevant load curve. The method has the beneficial effects that time-consuming error-prone configuration work on an engineering site is omitted, the implementation efficiency of engineering construction can be improved and large-scale implementation of distribution automation is facilitated. Rapid storage and search of the records can be realized, and the response capability of information is greatly improved.

Description

technical field [0001] The present invention relates to a method and device for realizing self-describing fixed-point records of power distribution terminals applied in power distribution automation systems with plug-and-play functions, and in particular to a fast storage, retrieval and completion of self-describing fixed-point records of power distribution terminals The realization method and device belong to the technical field of power system automation. Background technique [0002] In recent years, the power distribution industry has developed rapidly and the degree of distribution automation has been continuously improved, which has laid a solid foundation for the rapid development of the national economy. The degree of distribution automation depends on the protection applied in the distribution field, the intelligence of the measurement and control terminals and the number of such terminals, and the reliability of the centralized protection based on communication. W...

AI Technical Summary

Problems solved by technology

[0003] (1) In remote areas or in the basement of buildings, etc., the wireless signal is poor, the communication is unstable, and the data is easy to lose;

[0004] (2) The delay time of wireless communication is relatively large, and the delay time is uncertain, so it is difficult to guarantee the real-time performance of data;

[0005] (3) The wireless module itself may fail, and at the same time, there is an automatic shutdown caused by excessive traffic;

[0006] These problems will lead to poor real-time communication between the power distribution terminal and the main station, and even communication interruptions. The load curve of the main station is based on the real-time data of the power distribution terminal. Missing (communication interruption process) will lead to inaccurate statistical curves and poor curve smoothness of the master station, making it difficult to analyze the normal load trend, which will affect the reliability of power consumption

[0007] At present, the requirement for fixed-point records of power distribution terminals is that the recording interval is 15 minutes, and the data of no less than 31 days is saved. Assume that the number of telemetry data points saved by the power distribution terminal is 256, and each data occupies 4 bytes. Calculated according to 31 days, The data capacity is: 256×4×(60 / 15×24)×31=3047424 bytes=2.906M, the general practice is to store fixed-point records group by group according to time sequence, and the power distribution terminal generally adopts an embedded system, and its storage capacity And the processing power is limited, if it takes 20 milliseconds to read each record, in extreme cases, it will take 20 milliseconds × (60 / 15 × 24) × 31 = 59.52 seconds to retrieve the last record from the beginning, which will be an impossible accepted time

[0008] The above data only includes the data itself, and does not describe the "what" of the data. Even if the data is supplemented to the tool software or the power distribution master station, the data still cannot be used

[0009] Due to the above problems, the fixed-point recording of power distribution terminals has not been implemented in the power distribution system.

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