KR20170029827A

KR20170029827A - Apparatus and method for reconfiguring of distribution line

Info

Publication number: KR20170029827A
Application number: KR1020150126897A
Authority: KR
Inventors: 장문종; 이성우; 정금영
Original assignee: 한국전력공사
Priority date: 2015-09-08
Filing date: 2015-09-08
Publication date: 2017-03-16

Abstract

The present invention relates to an apparatus for reconfiguring a distribution system line and a method thereof. The apparatus includes a connection point selection part for selecting a connection point to be moved in a distribution line connected to a decentralized power supply, a path search part for searching a path along which the selected connection point can be moved, a connection point shifting part for shifting the connection point along the searched path, a direction determining part for determining whether the direction in which the connection point is moved is a direction in which a load decreases; and a return determining part for determining whether a feeder of the distribution line connected to the decentralized power supply is changed, whether overload and voltage constraint conditions match, and whether the connecting point is returned by verifying the generation of the overvoltage. So, it is possible to balance the load and minimize a loss.

Description

[0001] APPARATUS AND METHOD FOR RECONFIGURING OF DISTRIBUTION LINE [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and method for reconfiguring a power distribution line, and more particularly, to a reconfigurable power line reconfiguration apparatus and method for minimizing load equalization and loss in a power distribution system connected to a plurality of distributed power sources .

In order to effectively reconfigure the distribution system, we have tried to achieve optimization of the distribution system by defining the load equalization and loss minimization as an objective function for system optimization and finding a solution that minimizes this objective function. In the case of loss minimization, the optimization is achieved by finding a solution that minimizes the loss of each section of the target lines. In the case of load equalization, by finding a solution that minimizes the difference between the average load of each target line and each line load Optimization.

To this end, conventionally, a candidate to be moved is selected by first selecting a movement target open point and then searching for a straight line path. Then, move the target open point to the point where the objective function can be improved, and go back to the first step and repeat it repeatedly until there is no further link point movement. At this time, the objective function may be loss minimization or load equalization if necessary.

However, this approach is no longer applicable as the number and capacity of dispersed power sources are increasingly linked to distribution systems. In order for the distributed power supply to be connected to the power distribution system, it is possible to connect the distributed power supply only after there is no problem in the power distribution system through the technical review step of many items. If the position of the distributed power supply after the connection is changed, This is possible. In other words, when the connected line of the distributed power source is changed, there may be a change in the cumulative capacity, a possibility of deviating from the proper voltage, and a review of most technical examination steps such as malfunction and minor operation .

In this regard, Korean Patent Laid-Open Publication No. 2012-0131520 discloses a "optimal linkage analysis method for distribution lines ".

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a power distribution system in which a connection point having a largest load difference between a right line and a left line in a power distribution system having a plurality of connection points is selected as a connection point, And to provide a reconstruction apparatus and a method thereof.

It is another object of the present invention to provide an apparatus for reconfiguring a distribution system line and a method for verifying whether or not a feeder of a distribution line connected to a distributed power source after a connection point is changed, whether overload and voltage restriction conditions are met, have.

According to an aspect of the present invention, there is provided an apparatus for reconfiguring a power distribution line, comprising: a link point selecting unit for selecting a link point to be moved in a power distribution line connected to a distributed power source; A path search unit for searching for a path to which the selected link point can be moved; A linkage point moving unit moving the linkage point according to the searched path; A direction judging unit for judging whether or not the direction in which the link point is moved is a direction in which the load is decreasing; And a return judgment unit for verifying whether or not the feeder is changed to the distribution line connected to the distributed power source when the connection point moves in a direction in which the load is reduced and determining whether or not the connection point is returned.

The link point selection unit selects a link point having the largest load difference between the right line and the left line as a link point to be moved in a power distribution system having a plurality of link points.

The return determining unit may include: a feeder change verifying unit that verifies whether a feeder of the distribution line connected to the distributed power source is changed; A constraint verification unit that verifies whether the feeder of the distribution line connected to the distributed power source is unchanged, and which meets the overload and voltage constraint; And an overvoltage verification unit for verifying whether or not an overvoltage is generated when the overload and the voltage restriction condition are not satisfied.

In addition, when the feeder of the distribution line connected to the distributed power source is changed, the return determination unit determines that the feeder of the distribution line connected to the distributed power source is unchanged, but is in compliance with the overload and the voltage constraint, And a return decision unit for determining return of the connection point if any one of the overload and the overvoltage is not generated but the overload and the voltage restriction condition are not changed.

In addition, it is possible to determine whether the load on the distribution line connected to the distributed power source is reduced if the connection point does not move in the direction in which the load is reduced, or when the overvoltage does not occur, And further comprising:

In addition, when the load reduction determination unit determines that the load on the distribution line connected to the distributed power source is reduced, the linkage point is moved according to the path detected by the linkage point movement unit.

In the case where it is determined that the return of the connection point is determined by the return determination unit and that the load of the distribution line connected to the distributed power source is not decreased by the load reduction determination unit, ; And

According to another aspect of the present invention, there is provided a method for reconfiguring a power distribution line, comprising the steps of: selecting a link point to be moved in a power distribution line connected to a distributed power source; Searching for a route through which the selected link point can be moved by the route search unit; Moving a connecting point according to the detected path by the connecting point moving unit, determining whether the direction in which the connecting point is moved is a direction in which the load is reduced by the direction determining unit; And a step of verifying whether or not the feeder of the distribution line connected to the distributed power source is changed when the connection point moves in a direction in which the load is reduced by the return determination unit and determining whether or not the connection point is returned.

In addition, the step of selecting the link point to be moved in the distribution line connected with the distributed power source may include a step of, in the distribution system having a plurality of link points, connecting the link point having the largest load difference between the right line and the left line, Point.

If it is determined that the connecting point does not move in the direction in which the load is reduced after the step of determining whether the direction in which the connecting point is shifted is the direction in which the load is reduced or the case in which the overload and voltage restriction conditions are not satisfied, And judging whether or not the load on the distribution line connected to the distributed power source is reduced.

When it is determined that the load on the distribution line connected to the distributed power source is reduced after the step of determining whether or not the load on the distribution line connected to the distributed power source is reduced, And moving the linkage point along the linkage point.

In addition, the step of determining whether or not the connection point returns may include verifying whether the feeder of the distribution line connected to the distributed power source is changed; Verifying whether the feeder to the distribution line connected to the distributed power source is unchanged, meets the overload and voltage constraints; And verifying whether an overvoltage occurs if the overload and voltage constraints are not met; And a control unit.

Further, when the feeder of the distribution line connected to the distributed power source is changed after the step of verifying whether or not the overvoltage is generated, when the feeder to the distribution line connected with the distributed power source is not changed but the overload and voltage restriction conditions are met, Determining whether the feeder of the distribution line connected to the distributed power source is unchanged and whether an overvoltage or an overvoltage is generated even though the feeder is not overloaded and the voltage constraint is not satisfied; .

And returning the connection point to its original position when it is determined that the return of the connection point has been determined and that the load on the distribution line connected to the distributed power source has not been reduced after the step of determining the return of the connection point .

The apparatus and method for reconfiguring a power distribution line according to the present invention having the above-described configuration are characterized in that, in a power distribution system having a plurality of connection points, a connection point having the largest load difference between the right line and the left line is selected as a connection point to be moved Thus, it is possible to search for an optimal link point position within a short period of time by performing a link point search in the order of decreasing load from a link point having a large load difference.

In addition, the present invention verifies whether or not the feeder of the distribution line connected to the distributed power source after the connection point change, the overload and the compliance of the voltage restriction condition, and the occurrence of the overvoltage are detected and the technical matters and the connection environment So that even if a plurality of distributed power sources are connected to the power system, it is possible to prevent confusion due to line reconfiguration.

1 is a diagram for explaining a configuration of a distribution system line remodeling apparatus according to the present invention.
2 is a diagram for explaining a detailed configuration of a return determining unit employed in the power distribution line remodeling apparatus according to the present invention.
3 is a flowchart for explaining a procedure of a method of reconfiguring a distribution system line according to the present invention.
4 is a flowchart for explaining a procedure of selecting a connection point in the method of reconfiguring a power distribution line according to the present invention.
Fig. 5 is a view showing the construction of a porcelain D / L distribution line.
Fig. 6 is a diagram showing a configuration of a distribution line in a city D / L. Fig.
Fig. 7 is a diagram showing a configuration with a distribution line of composition D / L. Fig.
FIG. 8 is a diagram showing a point-to-point transition from a composition 91 (ID: 354) .fwdarw. (P055) to a 58R2 (ID: 311) between the compositions (P026).
FIG. 9 is a diagram showing the movement of the linkage from (P047) to the intergranular interlayer 10R22R4 (ID: 251) to (P043) porphyry interlayer 10R1 (ID: 249).
FIG. 10 is a diagram showing the movement of the joint point from (P117) to the interglacial part 98L94 (ID: 614) .fwdarw. (P065) to the interglacial part 98L62 (ID: 282).
FIG. 11 is a view showing the movement of the joint point from (P065) to the interglacial part 98L62 (ID: 282) .fwdarw. (P128) to the interglacial part 98L5 (ID: 661).
Fig. 12 is a diagram showing the movement of the linkage from the porphyry interval 98L5 (ID: 661) to (P023)) to the porphyry interval 62 (ID: 278) in (P128).

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings in order to facilitate a person skilled in the art to easily carry out the technical idea of the present invention. . First, in adding reference numerals to the constituent elements of the drawings, it should be noted that the same constituent elements are denoted by the same reference numerals whenever possible even if they are displayed on other drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

1 is a diagram for explaining a configuration of a distribution system line remodeling apparatus according to the present invention.

1, the power distribution line remapping apparatus 100 according to the present invention mainly includes a load calculation unit 110, a connection point selection unit 120, a path search unit 130, a connection point movement unit 140 A direction determining unit 150, a return determining unit 160, a load reduction determining unit 170, and a link point returning unit 180.

The load calculation unit 110 calculates a heavy load and a light load for a line that is a candidate for a reconfiguration candidate in a distribution line connected to a distributed power source. Here, it is used to investigate the central voltage constraint, overload constraint condition, and objective function, and is used to study the voltage constraint condition of the light distribution line. In this case, the calculation of the light load is intended to solve the problem of overvoltage when the distributed power source produces the maximum output in a situation where the load on the distribution line is small.

The connection point selection unit 120 selects a connection point to be moved in the distribution line connected to the distributed power source.

The link point selecting unit 120 selects a link point having the largest load difference between the right line and the left line as a link point to be moved in the power distribution system having a plurality of link points.

If the effect of the linkage point movement is large due to the load difference between the lines due to the linkage point selected later than the linkage point selected first, the linkage point selection unit 120 reassigns the linkage point selected first , The position is first searched from the link point where the load difference of the line is large due to the link point. That is, assuming that the load on the right line is Lr (CPi) and the load on the left line is Ll (CPi), the load on the left side of the right side Lr (CPi) - Ll (CPi) | is defined as ΔL = | Lr (CPi) - Ll (CPi) | and the load difference between the line and the left line is defined as To perform link point location search.

The path search unit 130 searches for a linear path through which the selected link point can be moved.

The link point moving unit 140 moves the link point along the detected straight path. That is, the link point shifting unit 140 moves the link point in a direction in which the objective function improves.

The direction determination unit 150 determines whether or not the direction in which the link point is moved is a direction in which the load decreases.

The return judging unit 160 verifies whether or not the feeder of the distribution line connected to the distributed power source is changed, whether or not the overload and the voltage restricting condition are met, and whether the overvoltage is generated when the link point moves in the direction of reducing the load, .

The return judging unit 160 verifies whether or not the feeder of the distribution line connected to the distributed power source is changed and returns to the original link point when the feeder is changed. If not, it is verified that the overload and the voltage restriction condition are met, , It is determined to return to the original connection point. Otherwise, it is verified that the overvoltage is generated to return to the original connection point when the overvoltage occurs.

The return decrease determining unit 170 determines whether or not the load on the distribution line connected to the distributed power source is reduced when the connection point does not move in the direction of reducing the load and when the overload and voltage restriction conditions are not met but the overvoltage does not occur .

In the case where it is determined that the load of the distribution line connected to the distributed power source has not been reduced by the load decrease determination unit 170, the connection point return unit 180 returns to the connection point To the original position.

2 is a diagram for explaining a detailed configuration of a return determining unit employed in the power distribution line remodeling apparatus according to the present invention.

2, when the connection point moves in the direction of reducing the load, the return determination unit 160 determines whether the feeder of the distribution line connected with the distributed power source is changed, whether the overload and the voltage restriction condition are met And whether or not an overvoltage is generated.

The return determining unit 160 includes a feeder change verifying unit 161, a constraint condition verifying unit 162, an overvoltage verifying unit 163, and a return determining unit 164.

The feeder changing unit 161 verifies whether or not the feeder of the distribution line connected to the distributed power source is changed.

The constraint verification unit 162 verifies whether or not the feeder of the distribution line connected to the distributed power source is unchanged, in compliance with the overload and the voltage constraint.

The overvoltage verification unit 163 verifies whether an overvoltage occurs if the overvoltage and the voltage restriction condition are not satisfied.

When the feeder to the distribution line connected to the distributed power source is changed, the return decision unit 164 determines that the feeder to the distribution line connected to the distributed power source has not been changed but the overdrive and the voltage constraint are met, If the feeder to the power distribution line is not changed, and the overload and voltage restrictions are not met but the overvoltage occurs, the return of the connection point is determined.

3 is a flowchart for explaining a procedure of a method of reconfiguring a distribution system line according to the present invention.

Referring to FIG. 3, the reconfiguration method of the power distribution line according to the present invention uses the power distribution line reconfiguration device described above, and a repeated description thereof will be omitted.

First, a heavy load is calculated for a line that is a candidate for reconfiguration in a distribution line connected to a distributed power source (S100).

Next, the light load in the distribution line connected to the distributed power source is calculated (S101).

Next, a connection point to be moved is selected in the distribution line connected to the distributed power source (S110). In step S110, the link point having the largest load difference between the right line and the left line in the distribution system having a plurality of connection points is selected as a connection point to be moved, and a concrete method will be described with reference to FIG.

Next, a straight line path in which the selected link point is movable is searched (S120).

Next, the link point is moved according to the detected straight path (S130).

Next, it is determined whether the direction in which the link point is moved is a direction in which the load is decreasing (S140).

In step S140, when the connection point moves in the direction of decreasing the load, it is verified whether or not the feeder of the distribution line connected to the distributed power source is changed, and whether or not the overload and the voltage restriction condition are met and whether the overvoltage is generated. (S150).

If it is determined in step S140 that the connection point has not moved in the direction of decreasing the load, it is determined whether the load on the distribution line connected to the distributed power source has decreased (S160).

In step S150, it is determined whether or not the feeder to the distribution line connected to the distributed power source is changed. If the feeder is changed, it is determined to return to the original connection point. Otherwise, if it is verified that the overload and voltage restriction conditions are met, If it is determined that overvoltage has occurred, it is determined that the overvoltage is returned to the original connection point when overvoltage occurs (S170).

If it is determined in step S160 that the load on the distribution line connected to the distributed power source is decelerated, the process moves to step S170 in which it is determined to return to the original connection point. In step S160, If it is not determined that the deceleration has been performed, the process returns to step S130 to move the link point.

Then, the process repeatedly repeats until no further linkage movement occurs (S180).

Next, when there is no more link point movement, it is determined whether all link points are optimized (S190). In step S190, if it is determined that optimization has not been performed for all the connection points, the flow returns to step S110 for selecting a connection point to be a movement target.

In step S190, if it is determined that optimization has been performed on all the connection points, it is determined whether the load balancing is performed (S191) and the process ends. If it is determined in step S191 that load balancing has not been performed, load balancing is performed (S192) and the process ends.

4 is a flowchart for explaining a procedure of selecting a connection point in the method of reconfiguring a power distribution line according to the present invention.

Referring to FIG. 4, a method of selecting a link point in a power distribution line reconfiguration method according to the present invention first performs a topology process for a system (S200).

Next, it is checked whether or not the connection point search is the first time (S210).

In step S210, if it is the first time that the link point search is performed, it is checked how many link points are located through the link point search (S220).

Then, the link point having the largest load difference among the link points among the link points is selected as the first link point (S230). In step S210, if the connection point search is not the first, the process directly moves to step S230.

Next, the link point is moved (S240).

Next, it is determined whether the constraint condition of the moved link point is satisfied (S250).

In step S250, if there is a constraint condition, it is determined whether the objective function exists (S251).

In step S251, if there is an objective function, the link point movement is determined (S252).

After step S252, the topology process for the system is performed secondarily (S253).

After step S253, next, a candidate load connection point is selected (S254).

After step S254, the selected candidate linkage point is determined as a linkage point to be examined next (S25), and the process returns to step S240.

In step S250, if there is no constraint condition, it is determined whether the priority of the association point is 1 (S260). In step S260, if the priority of the linkage point is 1, the process moves to step S254 for selecting a candidate linkage point having a large load.

In step S260, if the priority of the association point is not 1, it is determined whether the movement to the next association point is possible (S261). In step S261, if it is possible to move to the next link point, the flow returns to step S200 in which the topology process for the system is performed.

In step S261, if it is not possible to move to the next linkage point, it is determined whether all linkage point movements have been completed (S262). If it is determined in step S262 that the movement of all the linkage points is not completed, The process moves to step S254 for selecting a link point.

If it is determined in step S262 that the movement of all the connection points is completed, the process ends.

That is, after the position of the n-th linked point is selected, the n + 1-th linked point should be selected. If the (n + 1) -th linkage point is the previously selected linkage point, the selected linkage point is used. If not, the linkage point with the largest load difference except the linkage points from the current system to n- Select the link point and start the position search. If the (n + 1) -th linkage point is already selected, the search for the (n + 1) -th linkage point search is performed once to the last linkage point, not the first search, and then the search is performed again by the movement of the linkage point. Here, the additional information necessary for the linkage point search optimum order selection technique is the link point location already included in the information of the existing distribution line and the load information of the link line by each linkage point.

FIG. 5 shows a configuration of a distribution line of porphyritic D / L, FIG. 6 shows a distribution line of a city D / L, and FIG. 7 shows a distribution line of a composition D / L. FIG. 8 shows the linkage movement between the composition 91 (ID: 354) → (P055) and 58R2 (ID: 311) between compositions P026 and P026. FIG. (ID: 249), and FIG. 10 shows a linkage point movement between (P117) and (P117), and between 98L94 (ID: 614) 11 shows a joint point movement from (P065) to the interstice 98L62 (ID: 282) to (P128) and between the interstice 98L5 (ID: 661) (ID: 661) → (P023) day) to the interplanetary space 98 (ID: 278).

5 to 12 are diagrams for explaining an embodiment in which line reconstruction is applied to a porphyry D / L, a city D / L, and a composition D / L in a substation according to the present invention for a predetermined period.

First, the heavy load is calculated for each line to be reconstructed. Since the actual load incurred during a given period includes measurement errors, a reliable value among the loads listed from the maximum value to the field experience is set as the representative value. When the heavy load calculation ends for each line, the light load is also calculated for the line connected with the distributed power source. Since the estimation method may include measurement errors as in the case of heavy loads, a reliable value among the loads listed from the minimum value is selected as a representative value.

The heavy load and the maximum voltage drop point of each line in this embodiment are shown in Table 1 below.

Heavy load Maximum voltage drop point Downtown D / L 44.04A 13844.26V (75L22 between downtown) Composition D / L 37.66A 13759.13 V (composition ratio 265R2) Porphyry D / L 135.73A 13503.00V (interplanetary 227L40)

Then, the link point to be moved is selected.

(ID: 354) between the composition and the composition in the stream (P026), 10R22R4 (ID: 251) between porphyry and (P047) porphyry in the city, 98L94 (ID: 614 are the targets of the always-open point.

Then, the linear path search starts at each link point, and the link point is continuously moved in such a direction that the load reduction (objective function) of the distribution line connected to the distributed power source is improved.

(P026) between the composition is 91 (ID: 354), and since the load of the connection between the line composition and the two lines in the city is larger in the connection point, the connection point of the first connection point, The direction of movement is determined. Therefore, as shown in FIG. 8, this linking point moves to the point 58R2 (ID: 311) between the cities (P055).

Then, after the point of connection, verify whether the feeder is changed to the distribution line connected to the distributed power supply, whether the overload and the voltage constraint match, and whether the overvoltage is generated or not.

If the constraint is satisfied, the link point is moved and the changed line information is calculated.

In the present embodiment, the line information is changed according to the link point movement as shown in Table 2 below.

Heavy load Maximum voltage drop point Downtown D / L 35.94A 13850.06V (75L22 between cities) Composition D / L 45.77A 13747.42V (composition ratio 265R2) Porphyry D / L 135.73A 13503.00V (interplanetary 227L40)

Using the changed line information, it is checked whether the load on the distribution line connected to the distributed power source is reduced (objective function). If the load is improved, the link point is moved. If not, the flow returns to the original link point. In this embodiment, the load equalization is not improved, so that it returns to the original composition point 91 (ID: 354), which is the original point of connection (P026), and moves to the next point of connection.

Next, the second linkage point (P047) is the porphyry 10R22R4 (ID: 251), and the linkage point of the second linkage point is the porphyry The direction of movement is determined. Therefore, this linking point moves to (P043) the half-rock interval 10R1 (ID: 249) as shown in Fig.

After the point of connection, verify whether the feeder is changed to the distribution line connected to the distributed power source, whether overload and voltage constraint are met, and whether the overvoltage is generated or not.

In this embodiment, the line information is changed according to the link point movement as shown in Table 3 below.

Heavy load Maximum voltage drop point Downtown D / L 66.04A 13784.30V (499) Composition D / L 37.66A 13759.13 V (composition ratio 265R2) Porphyry D / L 113.73A 13507.86V (interplanetary 227L40)

Using the changed line information, it is checked whether the load on the distribution line connected to the distributed power source is reduced (objective function). If the load is improved, the link point is moved. If not, the flow returns to the original link point. In this embodiment, since the load equalization is improved, the connection point is selected as the always-open point since it moves to the next connection point (P043) and the inter-rock point 10R1 (ID: 249)

Next, the third linkage point (P117) is between the porphyritic part 98L94 (ID: 614) and the linkage point is the straight line path. The direction of movement is determined. Therefore, this coupling point moves to (P065) the half-rock interval 98L62 (ID: 282) as shown in Fig.

In this embodiment, the line information is changed according to the link point movement as shown in Table 4 below.

Heavy load Maximum voltage drop point Downtown D / L 66.04A 13784.30V (499) Composition D / L 39.90A 13749.49 V (composition ratio 265R2) Porphyry D / L 111.750A 13512.58V (interplanetary 227L40)

Using the changed line information, it is checked whether the load on the distribution line connected to the distributed power source is reduced (objective function). If the load is improved, the link point is moved. If not, the flow returns to the original link point. In this embodiment, since the load equalization has been improved, the next link point (P065) is moved to the half-rock gap 98L62 (ID: 282), and the new link point is updated.

Continue the selection again at the next link point in the new link point. That is, the joint point moved to (P065) porphyrium 98L62 (ID: 282) is moved again (P128) to the porphyrium 98L5 (ID: 661).

In this embodiment, the line information is changed according to the link point movement as shown in Table 5 below.

Heavy load Maximum voltage drop point Downtown D / L 66.04A 13784.30V (499) Composition D / L 51.99A 13697.50 V (between composition 265R2) Porphyry D / L 99.41A 13538.08V (interplanetary 227L40)

Using the changed line information, it is checked whether the load on the distribution line connected to the distributed power source is reduced (objective function). If the load is improved, the link point is moved. If not, the flow returns to the original link point. In this embodiment, since the load equalization is improved, the new connection point is updated by moving to the next connection point (P128) and between the half-rock gap 98L5 (ID: 661). Repeat the connection point selection from the new connection point to the next connection point movement direction. In other words, the joint point moved to the point P128 of semi-solid rock 98L5 (ID: 661) is moved again to the point P (ID: 278)

In this embodiment, the line connected with the distributed power source is changed and the restriction condition is violated. Therefore, the link point is returned to the previous link point, and the current link point is selected as the normal open point since there is no further link point movement.

The method shown in the above embodiment is repeated until all the joint points are found to find an optimal solution free from any further joint movement.

An apparatus and method for reconfiguring a line system of a power distribution system according to the present invention selects a link point having a largest load difference between a right line and a left line as a link point to be moved in a power distribution system having a plurality of link points, The linkage point search is performed in the order of decreasing load from the linkage point, and the search for the optimal linkage point position can be performed in a short time.

In addition, the present invention verifies whether or not the feeder of the distribution line connected to the distributed power source after the connection point change, the overload and the compliance of the voltage restriction condition, and the occurrence of the overvoltage are detected and the technical matters and the connection environment So that even if a plurality of distributed power sources are connected to the power system, confusion due to line reconfiguration can be prevented.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but many variations and modifications may be made without departing from the scope of the present invention. It will be understood that the invention may be practiced.

100: Distribution line line reconfiguration device
110:
120:
130: Path search section
140:
150:
160:
170:
180: link point return unit

Claims

A connection point selection unit for selecting a connection point to be moved in a distribution line connected to a distributed power source;
A path search unit for searching for a path to which the selected link point can be moved;
A linkage point moving unit moving the linkage point according to the searched path;
A direction judging unit for judging whether or not the direction in which the link point is moved is a direction in which the load is decreasing; And
A return judging unit for verifying whether or not a feeder to the distribution line connected to the distributed power source is changed when the connection point moves in a direction in which the load is reduced and determining whether the connection point is returned;
Wherein the power supply line reconfiguring apparatus comprises:

The method according to claim 1,
Wherein the link point selecting unit selects a link point having a largest load difference between the right line and the left line as a link point to be moved in a power distribution system having a plurality of link points.

The method according to claim 1,
The return judging unit judges,
A feeder change verifying unit for verifying whether a feeder to the distribution line connected to the distributed power source is changed;
A constraint verification unit that verifies whether the feeder of the distribution line connected to the distributed power source is unchanged, and which meets the overload and voltage constraint; And
An overvoltage verification unit for verifying whether an overvoltage occurs when the overload and voltage restriction conditions are not satisfied;
Wherein the power supply line reconfiguring apparatus comprises:

The method of claim 3,
The return judging unit judges that the feeder of the distribution line connected with the distributed power source is not changed but the feeder of the distribution line connected to the distributed power source is changed but the feeder of the distribution line connected to the distribution power source is not changed, And a return determining unit for determining return of the connection point if the feeder is unchanged and if any one of the overloaded and overvoltage-generating conditions does not meet the overload and voltage restriction conditions.

The method according to claim 1,
A load reduction determination unit for determining whether the load on the distribution line connected to the distributed power source is reduced when the connection point does not move in a direction in which the load is reduced and when the overvoltage and the overvoltage are not generated, Further comprising: a power supply line reconfiguring unit that reconfigures the power supply line.

6. The method of claim 5,
Wherein when the load reduction determination unit determines that the load on the distribution line connected to the distributed power source is reduced, the linkage point is moved according to the path detected by the link point moving unit.

6. The method of claim 5,
And a connection point returning unit for returning the connection point to the original position when it is determined that the return of the connection point is determined by the return determination unit and that the load on the distribution line connected to the distributed power source is not decreased by the load reduction determination unit Wherein the line reconfiguring device comprises:

Selecting a link point to be moved in the distribution line connected to the distributed power source by the link point selecting unit;
Searching for a route through which the selected link point can be moved by the route search unit;
Moving the joint point along the detected path by the joint point moving unit;
Determining whether the direction in which the link point is moved is a direction in which the load is reduced by the direction determination unit; And
A step of verifying whether or not the feeder is changed to a distribution line to which the distributed power source is connected when the connection point moves in a direction in which the load is reduced by the return determination unit and determining whether or not the connection point is returned;
Wherein the power supply line is connected to the power supply line.

9. The method of claim 8,
The step of selecting a link point to be moved in the distribution line connected to the distributed power source includes:
Wherein the link point having the largest load difference between the right line and the left line in the power distribution system having a plurality of connection points is selected as the connection point to which the power transmission line is to be moved.

9. The method of claim 8,
After the step of determining whether the direction in which the link point has been moved is in the direction of decreasing the load,
Determining whether or not the load on the distribution line connected to the distributed power source is reduced when the connection point does not move in a direction in which the load is reduced, and when the overvoltage and the overvoltage are not generated, A method of reconfiguring a distribution system line.

11. The method of claim 10,
After determining whether the load on the distribution line connected to the distributed power source has been reduced,
And moving the joint point according to the path detected by the joint point moving unit when it is determined that the load on the distribution line connected to the distributed power source is reduced.

9. The method of claim 8,
The step of determining whether or not the linkage point returns,
Verifying whether the feeder to the distribution line connected to the distributed power source is changed;
Verifying whether the feeder to the distribution line connected to the distributed power source is unchanged, meets the overload and voltage constraints; And
Verifying whether an overvoltage occurs if the overload and voltage constraints are not met;
Wherein the power supply line is connected to the power supply line.

13. The method of claim 12,
After verifying whether an overvoltage has occurred,
If the feeder to the distribution line to which the distributed power is connected is changed, the feeder to the distribution line to which the distributed power is connected is not changed, if the overload and voltage constraints are met, and if the feeder to the distribution line to which the distributed power is connected is changed And determining the return of the connection point if any one of the overload and voltage restriction conditions is not satisfied but the overvoltage is generated.

14. The method of claim 13,
After the step of determining the return of the linkage point,
And returning the connection point to the original position when it is determined that the return of the connection point is determined and that the load on the distribution line connected to the distributed power source has not been reduced.