KR-102964426-B1 - APPARATUS FOR ESTIMATING RANGE FOR EXCLUDING MAXIMUM LOAD OF DISTRIBUTION LINES FOR DISTRIBUTION PLANNING

Abstract

The present invention relates to a device for calculating a maximum load exclusion range for a distribution line, comprising: a distribution line load data acquisition unit that acquires distribution line load data from a substation operation result management system; and a control unit that calculates a Z-score using the distribution line load data according to a designated arithmetic formula and calculates a maximum load exclusion range based on the calculated Z-score.

Inventors

• 김준혁
• 이병성
• 문상근

Assignees

• 한국전력공사

Dates

Publication Date

20260513

Application Date

20250715

Claims (1)

1. A distribution line load data acquisition unit that acquires distribution line load data from a substation operation result management system; and A control unit that calculates a Z-score using a specified arithmetic formula based on the above distribution line load data, and calculates a maximum load exclusion range based on the calculated Z-score; The above control unit is, Set the Z-score value calculated from distribution line load data as the first criterion for calculating the maximum load exclusion range, and perform a distribution analysis of the maximum load exclusion range based on statistical analysis of the calculated Z-score value, A maximum load exclusion range distribution analysis is performed using a preset Z-score table and a standard deviation distribution graph corresponding to the Z-score values, and The above control unit is, The results of the above maximum load exclusion range distribution analysis are also notified to the user so that the user can be aware of them, and Reset the second maximum load exclusion range calculation criteria by receiving a new Z-score value from the user, and The maximum load exclusion range is recalculated based on the second maximum load exclusion range calculation criteria reset above, and The arithmetic formula for calculating the above Z-score is, is, Here, : Z-score, : Load data, : average, : A device for calculating the maximum load exclusion range of a distribution line for establishing a distribution plan, characterized by being a standard deviation.

Description

Apparatus for Estimating Range for Excluding Maximum Load of Distribution Lines for Distribution Planning The present invention relates to a device for calculating the maximum load exclusion range of a distribution line for establishing a distribution plan, and more specifically, to a device for calculating the maximum load exclusion range of a distribution line by analyzing the magnitude and frequency distribution of the maximum load based on statistical analysis of Z-score transformed values after acquiring load data of a distribution line. Generally, actual and predicted values of the maximum load for each distribution line are utilized to establish a distribution plan. However, when selecting the maximum load for each distribution line to establish a distribution plan as described above, it is merely specified to exclude temporary load fluctuations, and there are no additional constraints for selecting the maximum load. For reference, load switching is a typical temporary event that can affect the load on distribution lines. However, it is difficult to record and manage all load switching to exclude the portion caused by such switching when selecting the maximum load. Accordingly, even if the person in charge at the business unit successfully detects and corrects the aforementioned load switching, it is practically difficult to identify and correct (exclude) all unexpected temporary load switching (or peak load), such as when a large-scale motor load is started at a factory in an adjacent area or when rapid charging of an electric vehicle begins. In particular, as the complexity of the grid and the diversity of grid-connected loads and power sources increase, there is a problem in that it is virtually impossible to handle all such exceptional cases in the future. In other words, as the distribution system environment has recently become more diverse, it is difficult to calculate (or select) the maximum load of distribution lines by uniformly applying existing methods for calculating (or selecting) the maximum load of distribution lines to the current distribution system environment. Therefore, in order to calculate (or select) the maximum load of distribution lines in accordance with the recently diversified distribution system environment, there is a need for a method to calculate the exclusion range of the maximum load of distribution lines in order to exclude (or exclude) temporarily occurring load switching (or maximum load). The background technology of the present invention is disclosed in Korean registered patent No. 10-2055414 (registered on December 6, 2019, device for calculating operating capacity of distribution lines). FIG. 1 is an exemplary diagram showing the schematic configuration of a distribution line maximum load exclusion range calculation device according to one embodiment of the present invention. FIG. 2 is a flowchart illustrating a method for calculating the maximum load exclusion range of a power distribution line according to an embodiment of the present invention. FIG. 3 is an example diagram showing a preset Z-score table in FIG. 1. FIG. 4 is an example diagram showing a standard deviation distribution graph corresponding to the Z-score value in FIG. 3. FIG. 5 is an example diagram showing a change in maximum load distribution to verify the effect of the method for calculating the maximum load exclusion range of a power distribution line according to one embodiment of the present invention. Hereinafter, an embodiment of the apparatus and method for calculating the maximum load of a distribution line according to the present invention will be described with reference to the attached drawings. In this process, the thickness of lines or the size of components depicted in the drawings may be exaggerated for the sake of clarity and convenience of explanation. Furthermore, the terms described below are defined considering their functions in the present invention, and these may vary depending on the intent or convention of the user or operator. Therefore, the definitions of these terms should be based on the content throughout this specification. FIG. 1 is an exemplary diagram showing the schematic configuration of a distribution line maximum load exclusion range calculation device according to one embodiment of the present invention. As illustrated in FIG. 1, the distribution line maximum load exclusion range calculation device according to the present embodiment includes a distribution line load data acquisition unit (110), a control unit (120), and a maximum load exclusion range recalculation value output unit (130). The above distribution line load data acquisition unit (110) acquires distribution line load data from a substation operation result management system (SOMAS: Substation Operation result Management System) (not shown). At this time, the distribution line load data acquisition period is a period set to calculate the exclusion range for the maximum load of the distrib