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Current maximum extracting method based on feeder line groups

A technology of current maximum value and feeder group, applied in the direction of measuring current/voltage, measuring electrical variables, measuring devices, etc., can solve the problem of slow calculation process, etc., to achieve the effect of improving the acquisition time

Inactive Publication Date: 2018-12-18
DONGFANG ELECTRONICS
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Problems solved by technology

Due to the very large amount of data, the calculation process is extremely slow

Method used

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  • Current maximum extracting method based on feeder line groups

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Embodiment Construction

[0014] The technical scheme of the present invention is described in detail below in conjunction with accompanying drawing:

[0015] A method for extracting the maximum value of current based on feeder groups, for such as figure 1 For the distribution network shown, the calculation process is as follows:

[0016] (1) Real-time calculation of the feeder groups with contact relationship in the distribution network.

[0017] If there are two schemes for a feeder F1, and the backup feeders are F2 and F3, then there are two corresponding feeder pairing groups, namely {F1, F2} and {F1, F3}. Here {F1, F2} and {F2, F1} are considered to be the same record, and the feeder will be paired and stored in the library after scanning.

[0018] The specific method is as follows: cycle pairs such as figure 1 The feeders of the distribution network shown are scanned by N-1, and three power supply paths are obtained:

[0019] 1) D10-1, D10-2, Bus10, D11-1, D11-2, Bus11, D12-1, D12-2, Bus12, D...

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Abstract

The invention discloses a current maximum extracting method based on feeder line groups. The method comprises the steps of (1) calculating in real time connected feeder line groups in a distribution network; (2) calculating, based on a load rate table of the feeder lines, a maximum of daily current sum of each feeder line group and time corresponding to the maximum; and (3) during power supply transferring, performing statistics based on the maximum of daily current sum of the feeder line group and the corresponding time, so as to determine whether current sum of feeder lines of a master powerand a standby power is overloaded in a designated time period. According to the method, a scanning result of a distribution network N-1 and load rate historical library tables of the distribution network feeder lines are combined, so as to calculate and obtain N-1 paired combinations in advance and extract the load rate table, the maximum of the daily current sum of the feeder line group and thecorresponding time are extracted comprehensively so as to be used for following statistics, therefore, acquisition time for maximum current of a loss group is prolonged greatly.

Description

technical field [0001] The invention relates to a high-efficiency calculation method for current and maximum value processing of a faulty line and a backup feeder in the calculation of distribution network transfer to power supply, and belongs to the field of power system automation. Background technique [0002] When the power distribution equipment fails, it is often necessary to quickly provide a load transfer operation plan. Factors to be considered in load transfer include reasonable reconfiguration schemes to achieve equipment load balance, etc. At the same time, based on safety considerations, it is often necessary to consider the current of the main power supply and the backup power feeder after power transfer and whether it is overloaded within a certain period of time, which is an urgent concern of the distribution network. [0003] The traditional calibration method is to take out each feeder from the load rate meter for each calibration, and then accumulate to o...

Claims

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Application Information

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IPC IPC(8): G01R19/30
CPCG01R19/30
Inventor 潘凯岩高天亮赵勇徐海柱隋向阳
Owner DONGFANG ELECTRONICS
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