Feeder maximum load estimation method for distribution transformers

A distribution transformer and maximum load technology, applied in the electric power field, can solve the problems of user power outage, waste of investment, no effective method for feeder, etc., and achieve the effect of reducing power outage events and high prediction accuracy.

CN103245850BActive Publication Date: 2015-10-28SUZHOU CHINT ENTERPRISE DEV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2015-10-28

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Abstract

The invention discloses a method for predicating the maximum load of feeder lines of a distribution transformer, relates to the technical field of electric power, and aims to solve the technical problem that the future maximum load value of the distribution transformer cannot be accurately predicted. The method includes the steps as follows: firstly, historical load values of each feeder line in the year before a predicting day are acquired; then, an average load value of each feeder line at each sampling time of a sampling day is calculated on the basis of the historical load values; the maximum demand of daily declaration electricity is predicted on the basis of the calculated average load value and the historical maximum demand of daily declaration electricity, and the maximum prediction load value of the distribution transformer at each predicting time in the predicting day is calculated; the maximum value is chosen from the maximum prediction load values at each predicting time in the predicting day and taken as the maximum prediction load value of the distribution transformer in the predicting day; and the predicting time corresponding to the maximum prediction load value of the distribution transformer in the predicting day is taken as a time interval with the maximum load value of the distribution transformer in the predicting day. With the adoption of the method provided by the invention, investment waste of the volume of the feeder lines of the distribution transformer can be effectively avoided.
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Description

technical field

[0001] The invention relates to electric power technology, in particular to a method for estimating the maximum load of a feeder line of a distribution transformer. Background technique

[0002] In the analysis of electricity consumption in the power system, in order to meet the needs of production and life, it is usually necessary to calculate the maximum capacity of customers’ electricity consumption in the future, so as to dispatch distribution transformers with appropriate capacity, or arrange reasonable switching methods.

[0003] The power load of the feeder of the distribution transformer is changing, it is difficult to determine accurately, it can only be estimated based on certain experience, and the capacity of the distribution transformer of the substation is fixed after it is determined. If the transformer capacity configuration is too large, it will cause waste of investment; if the transformer capacity configuration is too small, and the switchi...

Examples

Embodiment Construction

[0028] The embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings, but the present embodiments are not intended to limit the present invention, and any similar structures and similar changes of the present invention should be included in the protection scope of the present invention.

[0029] Such as figure 1 As shown, a method for estimating the maximum load of a distribution transformer feeder provided by an embodiment of the present invention is characterized in that the specific steps are as follows:

[0030] 1) Set a fixed sampling interval, denoted as ⊿T, where ⊿T usually takes 1 to 3 minutes;

[0031] 2) From the date of the current year, select a day as the estimated date;

[0032] 3) If there is no day in the previous year with the same month and date as the estimated date, select the day in the previous year that is the same month and the same day as the day before the estimated date as the sample...