WO2011040657A1

WO2011040657A1 - Automatic electric power distribution system and method for operating same

Info

Publication number: WO2011040657A1
Application number: PCT/KR2009/005622
Authority: WO
Inventors: 하복남; 이성우; 신창훈; 박소영
Original assignee: 한국전력공사
Priority date: 2009-09-29
Filing date: 2009-09-30
Publication date: 2011-04-07
Also published as: KR20110035096A; KR101039427B1

Abstract

Disclosed is an automatic electric power distribution system, comprising: a plurality of distribution lines that configure a distribution network; a plurality of switch units that are installed in either a normally open state or a normally closed state on the distribution lines; and a server that issues a command for measuring a load current to each switch unit and receives the measured data, stores the measured data and a list of the switch units that are in a normally open state, calculates the power supply and power loss for each section according to change in position of the normally open switch units using the list and the measured data, and then determines the positions of the normally open switch units using the calculation result.

Description

Distribution automation system and its operation method

The present invention relates to a distribution automation system and a method of operating the same, and more particularly, to a distribution automation system to which the distribution network optimization technique can be applied and its operation method.

The distribution line drawn out from the substation is provided with a plurality of normally open and closed parts operated in a normally closed state and several open and closed parts operated in a normally open state. The open and close parts connect different distribution lines, and since a plurality of normally open and open parts are installed in each distribution line, the distribution network has a very complicated configuration in which dozens to hundreds of distribution lines are connected to each other.

Distribution automation systems with remote supervisory control utilize computer and communication technology to monitor and control the status of remote switchgear. In order to monitor the status of switchgear, power distribution automation systems can remotely measure analog values such as voltage and current, as well as physical conditions such as closing or opening.

The problem to be solved by the present invention is to provide a distribution automation system that can minimize the power loss of the line and level the power supply.

In addition, another problem to be solved by the present invention is to provide a distribution automation system operating method for efficiently operating the distribution network.

According to one aspect of the present invention, a power distribution automation system is provided.

In a distribution automation system according to an embodiment of the present invention, a plurality of distribution lines constituting a distribution network, each of the plurality of openings and closing portions installed in one of an open state and a normally closed state on the distribution lines, respectively Command measurement of the load current to receive measurement data, store a list of the open / close parts and the measurement data in the normally open state, and use the list and the measurement data in the distribution line according to the position movement of the normally open and closed part. After calculating the power supply amount and the power loss for each section of the furnace may include a server for determining the position of the normally open and closed using the calculation result.

According to another aspect of the present invention, a method for operating a distribution automation system is provided.

In a method of operating a distribution automation system according to an embodiment of the present invention, the method may include: creating a list of normally open / closed parts of a plurality of open / closed parts arranged on a plurality of distribution lines, and selecting one normally open open / closed part from the list. Setting two distribution lines connected to the switch unit as a simulated distribution path, calculating at least one of a sum of power loss and a power supply leveling rate of each of the two distribution lines while moving the positions of the normally open and closed parts in the simulated distribution path; Selecting a position of the normally open and closed part based on a calculation result, and repeatedly setting the simulated distribution path and selecting the position of the normally open and closed part for the remaining normally open and closed parts in the list. Determining the position of the opening and closing portion may include.

The present invention can minimize the power loss of the power distribution network by applying the method of minimizing the power loss, and can improve the load ratio of the power distribution line by applying the power supply leveling method. Can be achieved.

1 is a circuit diagram showing a power distribution automation system according to an embodiment of the present invention.

2 is a diagram illustrating a distribution network in which normally open and closed portions and the open and open portions are installed on distribution lines.

3 and 4 are views for explaining a method of operating a distribution automation system to minimize the power loss according to an embodiment of the present invention.

5 and 6 are views for explaining a method for operating a distribution automation system for achieving a power supply leveling according to another embodiment of the present invention.

7 and 8 are diagrams for describing a method of operating a distribution automation system for minimizing power loss and leveling power supply according to another embodiment of the present invention.

10: distribution automation system 101, 102: distribution line

120: opening and closing portion 140: server

150: control module 160: database

170: application module 180: communication unit

190: terminal unit

As the inventive concept allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all transformations, equivalents, and substitutes included in the spirit and scope of the present invention. In the following description of the present invention, if it is determined that the detailed description of the related known technology may obscure the gist of the present invention, the detailed description thereof will be omitted.

Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

Hereinafter, embodiments of the distribution automation system and its operation method according to the present invention will be described in detail with reference to the accompanying drawings, in the description with reference to the accompanying drawings, the same or corresponding components are given the same reference numerals Duplicate description thereof will be omitted.

Referring to FIG. 1, a distribution automation system 10 according to an embodiment of the present invention includes a plurality of

distribution lines

101 and 102, a plurality of opening and closing units 120, a server 140, a communication unit 180, and a plurality of terminal units. 190.

Each of the

distribution lines

101 and 102 forms a distribution network by connecting

substations

51 and 52 to an electrical receiving place.

Each of the opening and closing parts 120 is installed in the

distribution lines

101 and 102 and maintains an open or closed state in the

distribution lines

101 and 102. The opening and closing portions 120 are remotely monitored and controlled from the server 140. The opening and closing parts 120 include a plurality of normally open and closed parts 133 which are normally opened and a plurality of normally closed opening and closing parts 131 which are normally input.

The normally open and closed portions 131 and the normally open and closed portions 133 are installed on the

distribution lines

101 and 102 to form a converter in the distribution network. The normally closed opening and closing portion 131 forms a converter for each of the

distribution lines

101 and 102. In addition, the normally open and closed part 133 connects the distribution lines (101, 102). The normally open and closed part 133 distinguishes a path of each of the

distribution lines

101 and 102.

Between the opening and closing portions 120 provided on the

distribution lines

101 and 102 or the blocking

portions

71 and 72 connected to each of the

substations

51 and 52 and the opening and closing portion connected to the blocking

portions

71 and 72. The space between the 120 is defined as one section. Loads are connected to each section.

The server 140 commands the measurement of the load current to each of the opening and closing parts 120, and receives and stores measurement data of the load current from each of the opening and closing parts 120. The server 140 stores the list of the normally open and closed parts 133 and the measurement data, and the

distribution lines

101 and 102 according to the position movement of the normally open and closed part 133 by using the list and the measurement data. Calculate the power supply amount and power loss for each section, and determine the position of the normally open and closed unit 133 for leveling the power supply and minimizing the power loss by using the calculation result. To this end, the server 140 includes a control module 150, a database 160 and an application module 170.

The control module 150 remotely monitors and controls each of the opening and closing parts 120, receives the measurement data, and transmits the measured data to the database 160.

The database 160 may express and search for connectivity of the

distribution lines

101 and 102. Specifically, the database 160 is connected to the opening and closing parts 120 and the line between the end portions of the

distribution lines

101 and 102 from the blocking

portions

71 and 72 drawn from the

substations

51 and 52, respectively. Save connection information. In addition, the database 160 stores the thickness and length information of the wire of each section for the technical calculation, such as power loss or voltage drop, and the impedance per unit length for each wire type.

The database 160 receives and stores the measurement data from the control module 150 and stores a list of the normally open and closed units 133 installed in the distribution network.

The application module 170 uses the list and the measurement data from the database 160 to provide power and amount of power for each section of the

distribution lines

101 and 102 according to the position movement of the normally open and closed parts 133. Calculate the loss. The application module 170 determines the position of the normally open and closed unit 133 by using the calculation result of the power supply amount and power loss. For example, the application module 170, when the position of the normally open and closed unit 133 is moved to a place all moveable in the distribution network, the power supply amount leveling rate of the distribution lines (101, 102) is the minimum or the The positions of the normally open and closed parts 133 are determined where the sum of the power losses of the

distribution lines

101 and 102 is minimum. Here, the positional movement of the normally open and closed part 133 is set to the two distribution lines (101, 102) of the distribution path is distinguished by the normally open opening and closing part 133 of the distribution lines (101, 102) as a simulated distribution path, After switching the normally open and closed part 133 into the normally closed opening and closing part 131 in the simulated distribution path, one of the normally closed opening and closing parts 131 installed in the simulated distribution path to the normally open and closed part 133. Is done by switching.

On the other hand, the application module 170 is most preferably to determine the position of the normally open and closed unit 133 in the distribution network in consideration of both the sum of the power supply leveling rate and the power loss, but the situation of the distribution network Accordingly, the position of the normally open and closed part 133 may be determined by considering only one of the sum of the power supply leveling and the power loss. This will be described in more detail with reference to FIG. 2.

The communication unit 180 transmits the measurement command of the load current received from the server 140 to the terminal units 190 connected to each of the opening and closing units 120, and the measurement data from the terminal units 190. Receive In addition, the communication unit 180 transmits a remote control command received from the server 140 to the terminal units 190 and receives a control result from the terminal units 190. For example, the communication unit 180 transmits the measurement command to the terminal unit 190 connected to the normally open and closed unit 131, and the terminal unit 190 connected to the normally open and closed unit 133. Send a remote control command.

Each of the terminal parts 190 is connected to the opening and closing parts 120, and controls the opening and closing parts 120 using the measurement command and the remote control command received from the communication unit 180. In addition, each of the terminal units 190 transmits a control result of the opening and closing units 120 to the communication unit 180.

The distribution automation system 10 calculates the loss of the

distribution lines

101 and 102 by using the measurement data acquired from the opening and closing portions 120, and moves the position of the normally open and closed portion 133 to the distribution line. The loss sum of the

fields

101 and 102 may be calculated to minimize the power loss of the distribution network.

As shown in FIG. 2, the distribution network includes first to sixth distribution lines F1, F2, F3, F4, F5, and F6 and the first to sixth distribution lines F1, F2, F3, and F4. It consists of a plurality of opening and closing portion 120 provided in, F5, F6. The opening and closing parts 120 are divided into a plurality of normally open and closed parts 133 and a plurality of normally closed opening and closing parts 131 according to an operating state. The opening and closing portions 120 are remotely monitored and controlled by the server 140.

In order to implement a method for minimizing the power loss of the distribution network, the server 140 selects the normally open and closed part 133 of N31, and the third power distribution line F3 connected to the normally open and closed part 133 of N31. By connecting the sixth distribution line (F6) to define a simulated distribution path. For example, the simulated distribution paths are normally closed openings 131 of N30, N29, N28, and N27 connected to the normally open and closed portions 133 of N31, and N32, N41, N40, N47, N48, N49, N59, and N60. , N61 is made up of normally closed opening and closing portions 131. The simulated distribution paths are two distribution lines formed by connecting the normally closed openings and closing portions 131, and two distribution lines are distinguished by the normally open and closed portions 133.

The server 140 calculates the power loss of each of the third and sixth distribution lines F3 and F6 while moving the position of the normally open and closed part 133 and stores the sum of the power losses. The server 140 moves the normally open and closed part 133 of the N31 to the normally closed opening and closing part 131 of the N41 in the simulation distribution path. For example, the server 140 switches the operating state of the normally open and closed unit 133 of the N31 to the normal input, and switches the operating state of the normally closed opening and closing unit 131 of the N41 to always open. After the server 140 moves the normally open and closed part 133, the server 140 calculates power loss of each of the third and sixth distribution lines F3 and F6, and stores the sum of the power losses. The server 140 repeats this series of processes until the loss of power is no longer reduced in the simulation distribution path until the normally open and closed unit 133 is impossible to move.

The server 140 selects the position of the normally open and closed unit 133 having the minimum sum of the power losses using the sum of the stored power losses.

The server 140 selects the remaining normally open and closed parts 133 in the distribution network, and defines a simulated distribution path composed of two

distribution lines

101 and 102 connected to the normally open and closed part 133. The server 140 repeats a series of processes of moving the normally open and closed unit 133, and selects the position of the normally open and closed unit 131 as a position where the sum of the power losses is minimum.

The server 140 determines the position of the normally open and closed part 133 by minimizing power loss of the

distribution lines

101 and 102.

In addition, the server 140 may repeat a series of processes of moving the position of the normally open and closed unit 133 after defining the simulation distribution path to level the power supply of the distribution network. The power supply leveling method calculates a leveling rate of the power supply amounts of the

distribution lines

101 and 102 according to the positional movement of the normally open and closed unit 133 as in the method of minimizing the power loss, and the leveling rate of the power supply amount is minimum. The position of the normally open opening and closing part 133 is selected.

On the other hand, the server 140 may be different from the calculation result of the power loss minimization method and the power supply leveling method. Accordingly, the server 140 may determine the position of the normally open and closed unit 133 by considering the power loss minimization method and the power supply leveling method together. This will be described in detail with reference to FIGS. 3 to 8.

3 and 4, in step S10, the server 140 stores all the normally open and closed parts 133 installed in the distribution network as a list, and moves the positions of the normally open and closed parts 131. The control sequence of the openings and closing parts 120 is made.

In step S20, the server 140 obtains the objective function in the current state.

In step S30, the server 140 determines the combination of the normally open and closed parts 133 and sets the order to examine and move the normally open and closed part 133 selected from the normally open and closed parts 133.

In step S40, the server 140 selects the normally open opening and closing part 133 of the first order of the set sequence of the normally open and closed part 133, and connects the two

distribution lines

101 and 102 connected to the selected normally open and closed part 133. After setting the simulated distribution path, the normally open and closed part 133 is moved in the simulated distribution path, and the objective function for the method of minimizing power loss is calculated.

Specifically, in order to minimize the loss of the distribution network, the server 140 may observe the constraints such as the rated capacity of the line, the voltage drop, and the configuration of the radial distribution line, so that the sum of the power losses of the distribution network is minimized. The location of the normally open opening and closing part 133 should be selected. The server 140 may determine the power loss minimization of the

power distribution lines

101 and 102 as an objective function in order to achieve minimization of power loss in the distribution network. The information necessary for calculating the power loss of the

distribution lines

101 and 102 is a unit impedance value, a load current value, and a length of each section for each type of wire constituting the

distribution lines

101 and 102. The server 140 applies a power loss calculation formula as shown in Equation 1 on the assumption that the load is uniformly distributed in each section by the target function.

Equation 1

In Equation 1, I _i-1 is the current value in the i-1 section, I _i is the current value in the i section, D _i is the length of the i section and r _i is between the i-1 section and the i section Is the unit impedance due to the line resistance.

In step S50, the server 140 determines whether the current function of minimizing power loss is reduced from the previous function of minimizing power loss while moving the normally open and closed unit 133. For example, in FIG. 2, the simulated distribution path is set for the third distribution line F3 and the sixth distribution line F6 connected to the normally open and closed part 133 of N31. Subsequently, the other open / close unit 133 is selected and the power loss reduction is repeatedly calculated in the same manner. When the position of the normally open / close unit 133 is changed, the loss of the distribution network is no longer reduced. Can be minimal.

When the normally open and closed part 133 is moved in the simulated distribution path, the current flowing through the two

distribution lines

101 and 102 is only two distribution lines as much as the corresponding power supply of the section between the normally open and closed parts 133 to which the position is moved. The sum of the currents does not change, only by (101,102). Since the current change problem is related to the change in power loss of the two

distribution lines

101 and 102, the increase and decrease of the power loss is calculated by applying Equation 2.

Equation 2

In Equation 2,? L increases or decreases power loss, S1 represents a section from the output terminal of the first distribution line 101 to the normally open and closed portion, and S2 represents the normally open and closed portion at the output terminal of the second distribution line 102. Where i _m is the current in the moved region, I is the maximum current before the movement, and R is the resistance of the distribution lines.

As a result of the determination in step S60, if the objective function of minimizing the current power loss is smaller than the objective function of minimizing the previous power loss, the normally open and closed parts 133 disposed at a position where the objective function of minimizing the power loss is greatly reduced. To modify the position combination of the new normally open and closed parts 133.

In step S70, the next normal open / close unit 133 is selected from the list, and two

distribution lines

101 and 102 connected to the selected normally open and closed unit 133 are set as simulated distribution paths and then within the simulated distribution path. The target function of minimizing power loss is calculated by moving the normally open and closed part 133.

As a result of the determination in step S80, the server 140, if the objective function of the current power loss minimization is not reduced than the objective function of the previous power loss minimization, all the normally open and closed parts in the position combination of the normally open and closed parts 133 It is determined whether the fields 133 are reviewed in order.

As a result of the determination in step S90, the server 140 selects the next normally open or closed part 133 from the list if all the normally open or closed parts 133 are not examined, and the selected normally open or closed part 133 is selected. After setting two distribution lines (101, 102) connected to the simulated distribution path, the normally open and closed unit 133 is moved in the simulated distribution path, and the objective function for the method of minimizing power loss is calculated. The server 140 calculates the objective function and returns to the previous step S50.

As a result of the determination in step 100, the server 140 determines whether the objective function of minimizing the power loss no longer decreases when all of the position combinations of the normally open and closed parts 133 are sequentially examined. If the objective function of minimizing the power loss does not decrease any more, the process returns to the previous step S40.

As a result of the determination in step 110, if the objective function of minimizing the power loss no longer decreases, the server 140 determines the position of the normally open and closed unit 133 to minimize the power loss.

5 and 6, in step S210, the server 140 collects data on the spare capacity of each of the

distribution lines

101 and 102 constituting the distribution network and the spare capacity of the peripheral pressure.

In step S220, the server 140 stores all the normally open and closed parts 133 installed in the distribution network as a list, and controls the order of the opening and closing parts 120 to move the positions of the normally open and closed parts 133. Make.

In step S230, the server 140 obtains the objective function in the current state.

In step S240, the server 140 determines the combination of the normally open and closed parts 133 and sets the order to examine and move the normally open and closed parts 133 selected from the normally open and closed parts 133.

In step S250, the server 140 selects the normally open opening and closing unit 133 of the first order of the set sequence of the normally opening and closing unit 133, and connects the two

distribution lines

101 and 102 connected to the selected normally opening and closing unit 133. After setting the simulated distribution path, the normally open and closed unit 133 is moved in the simulated distribution path, and the objective function for the power supply leveling method is calculated.

Specifically, the position of the normally open and closed part 133 to minimize the loss of the power distribution network should be selected so that the power supply level leveling rate of the power distribution network is minimized. The server 140 selects one of the normally open and closed parts 133 to equalize the power supply of the power distribution network as well as minimize the power loss of the power distribution network, and the normal open and close part 133 of the simulated distribution path. The power supply amount of each of the two

distribution lines

101 and 102 is calculated while changing the position. The server 140 finds the position of the normally open and closed unit 133 in which the leveling rate of the power supply amounts of the two

distribution lines

101 and 102 is minimum. Here, the power supply level leveling rate may be calculated through Equation 3.

Equation 3

In Equation 1, PLR is a power supply leveling rate, F1 is a load rate of a distribution line with a large sum of power supplies per section, and F2 is a load rate of a distribution line with a small sum of power supplies per section. Here, the load ratio of the distribution line is 0.6, for example, when the line load is 6000 kW and the power supply amount of the distribution line is 10000 Kw, as the ratio of the power supply amount of the distribution line to the line load.

In step S260, the server 140 determines whether the objective function of the power supply leveling exceeds the limits of the spare capacity of each of the

distribution lines

101 and 102 and the spare capacity of the peripheral pressure. When the objective function of the power supply leveling exceeds the limit of the spare capacity, the server 140 performs the next step S310.

As a result of the determination in step S270, if the objective function of the power supply leveling does not exceed the limit of the spare capacity, the server 140 moves the normally open / close unit 133 and transfers the objective function of the current power supply leveling. It is determined whether the power supply is reduced from the objective function of leveling.

As a result of the determination in step S280, if the objective function of the current power supply leveling is reduced from the objective function of the previous power supply leveling, the server 140 is normally opened at a position where the objective function of the power supply leveling is further reduced. The opening and closing parts 133 are modified with the position combination of the new normally open and closed parts 133.

In step S290, the server 140 selects the next normally open and closed unit 133 in the list, and sets two

distribution lines

101 and 102 connected to the selected normally open and closed unit 133 as mock distribution paths. The normally open and closed part 133 is moved in the simulation distribution path and the objective function of leveling the power supply is calculated.

As a result of the determination in step S300, if the objective function of the current power supply leveling level has not decreased from the previous objective function of the previous power supply leveling according to the positional movement of the normally open and closed unit 133, the server 140 is the normally open and closed unit. In the position combinations of the fields 133, it is determined whether all the normally open and closed parts 133 are reviewed in order.

As a result of the determination in step S310, if all of the normally open and closed parts 133 are not examined, the server 140 selects the next normally open and closed part 133 from the list, and the selected normally open and closed part 133 is selected. After setting the two distribution lines (101, 102) connected to the simulated distribution path, the normally open and closed unit 133 is moved in the simulated distribution path to calculate the objective function of the power supply leveling. The server 140 calculates the objective function of the power supply leveling and returns to the previous step S50.

As a result of the determination in step S320, the server 140 determines whether the objective function of the power supply leveling no longer decreases when all of the position combinations of the normally open and closed parts 133 are sequentially examined. If the objective function of the power supply leveling is no longer reduced, the server 140 returns to the previous step S250.

As a result of the determination in step S330, if the objective function of the power supply leveling no longer decreases, the server 140 determines the position of the normally open and closed unit 133 for optimal power supply leveling.

Since the calculation result of the method for minimizing power loss and the calculation result of the power supply leveling method may be different from each other, the operation method of the distribution automation system according to another embodiment of the present invention is optimal in the distribution network considering both calculation results. Operational measures can be implemented.

Referring to FIGS. 7 and 8, in step S410, the server 140 moves to the objective function of the power supply leveling level in the current state and the position of the normally open and closed parts 133 according to the list of the normally open and closed parts 133. Calculate the objective function of optimal power supply leveling accordingly. Here, the objective function of the power supply level leveling and the optimal function of the power level equalization are calculated according to the power supply level leveling method described with reference to FIG. 4.

In step S420, the server 140 minimizes the optimal power loss according to the objective function of minimizing power loss in the current state and the position of the normally open and closed parts 133 according to the list of the normally open and closed parts 133. Calculate the objective function. Here, the objective function of minimizing power loss and the optimal function of minimizing power loss in the current state are calculated according to the power loss minimization method described with reference to FIG. 3.

In step S430, the server 140 opens a new normal opening / closing unit 133 by one step toward the position combination of the normally opening and closing unit 133 having the lower weighting factor at the position of the normally opening and closing unit 133 having the higher weighting factor. ) Position combination.

In step S440, the server 140 calculates the objective function of the power supply leveling and the objective function of minimizing the power loss according to the position combination of the new normally open and closed unit 133.

In step S450, the server 140 calculates the objective function of the power supply leveling and the objective function of minimizing the power loss including the weighting factor. The integrated objective function J _total to consider the two evaluation methods is defined as in Equation 4.

Equation 4

In Equation 4, W _Load is an economic weighting factor of power supply leveling rate, W _Loss is an economic weighting factor of power loss minimization, J ^N _Load is an objective function value considering only power supply leveling rate of initial system state, and J ^U _Load is power The optimal solution objective function value considering only the supply leveling rate, J ^N _Loss is the objective function value considering only the initial loss of system state, and J ^U _Loss is the optimal solution function value considering only the loss minimization.

Since the method of calculating the integrated objective function is different in units and factors of the power supply leveling method and the method of minimizing the power loss, it is necessary to consider both methods to implement a comprehensive distribution network optimization and multiply the economics. It is a way to evaluate whether the effect of

The method of calculating the integrated objective function calculates the deviation of how much the level of power supply leveling and the power loss minimization can be improved from the current state to the optimum state, and the value of the objective function in the current state is Determine how close you are to proportion, and multiply by economic weight.

The economic weighting factor uses the ratio of the amount of the reduction effect obtained by multiplying the cost of generating electricity at the power plant by the amount of power due to the reduction of power loss, and the ratio of the amount of effect that the utility operator obtains from the leveling of the electricity supply. . Through the method of calculating the integrated objective function, it is possible to obtain a solution for obtaining an optimal economic effect of the leveling of the power supply and minimizing the power loss.

In step S460, the server 140 determines whether the value of the integration objective function is reduced.

As a result of the determination in step S470, if the value of the integrated objective function is reduced, the server 140 changes the position of the normally open and closed unit 133 to the current position.

As a result of the determination in step S480, if the value of the integrated objective function is not reduced, the server 140 changes the position of the normally open and closed unit 133 to a previous position.

In operation S490, the server 140 determines whether the integration objective function is no longer reduced even though all combinations of the normally open and closed units 133 are reviewed.

As a result of the determination in step S500, when the integration objective function is reduced, the server 140 selects a position combination of the normally open / close unit 133 of the next step based on the current position. After selecting the position combination of the normally open and closed unit 133, the server 140 returns to the previous step S440.

As a result of the determination in step S510, if the integration objective function is no longer reduced even after reviewing all the combinations, the server 140 determines the position of the normally open and closed unit 133 as an optimal position.

The distribution automation system and its operation method according to the present invention can minimize the power loss of the distribution network by applying the power loss minimization method, and can improve the load ratio of the distribution line by applying the power supply leveling method, through which economic loss This can be reduced to achieve efficient distribution network operation.

An embodiment of the present invention may include a computer readable medium including program instructions for performing various computer-implemented operations. The computer readable medium may include a program command, a local data file, a local data structure, etc. alone or in combination. The media may be those specially designed and constructed for the purposes of the present invention, or they may be of the kind well-known and available to those having skill in the computer software arts.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

Claims

A plurality of distribution lines constituting a distribution network;

A plurality of opening and closing portions installed on one of a normally open state and a normally closed state on the distribution lines; And

Command measurement of the load current to each of the opening and closing parts to receive measurement data, and store the list of the opening and closing parts and the measurement data in the normally open state, and move the position of the normally open and closed part using the list and the measurement data. And calculating a power supply amount and a power loss for each section of each of the distribution lines, and determining a position of the normally open and closed unit using a calculation result.
According to claim 1,

The server is

A control module for remotely controlling each of the opening and closing portions and receiving the measurement data;

A database for storing the list and receiving and storing the measurement data from the control module;

And an application module for calculating the power loss and the power supply according to the positional movement of the normally open and closed unit using the list and the measurement data from the database.
The method of claim 2,

The calculation module

A section load calculation module for calculating a power supply amount for each section of the distribution lines;

A power loss calculation module for calculating a power loss of each of the distribution lines in accordance with the positional movement of the normally open and closed part in the distribution network; And

And a power supply level leveling module configured to calculate a power supply level leveling rate of the power distribution lines by moving a section load in the distribution network.
Creating a list of normally open and closed parts of the plurality of openings and closing parts arranged on the plurality of distribution lines;

Selecting one normally open and closed part from the list to set two distribution lines connected to the selected normally open and closed part as a simulated distribution path;

Calculate at least one of the sum of the power losses of each of the two distribution lines and the power supply leveling rate while moving the positions of the normally open and closed portions in the simulated distribution path, and select the positions of the normally open and closed portions based on the calculation result. Doing;

Repeating the setting of the simulated distribution path and the selection of the position of the normally open opening and closing part for the remaining normally open and closed portions in the list; And

Method for operating a distribution automation system comprising the step of determining the position of the normally open opening and closing.
The method of claim 4, wherein

The step of selecting the position of the normally open opening and closing

And the position of the normally open and closed part is selected at a place where the objective function for the sum of the power losses of each of the distribution lines is minimum.
The method of claim 4, wherein

The step of selecting the position of the normally open opening and closing

And the position of the open / close unit is selected at a place where the objective function for the power supply level leveling rate of each of the distribution lines is minimum.
The method of claim 4, wherein

The step of selecting the position of the normally open opening portion

And the position of the normally open and closed part is selected at a position where the sum of the power loss of each of the distribution lines and the integrated objective function of the power supply level leveling rate are minimum.
In the recording medium recording a program for implementing a method of operating a distribution automation system,

Creating a list of normally open and closed parts of the plurality of open / close parts arranged on the plurality of distribution lines;

Selecting one normally open and closed part from the list to set two distribution lines connected to the selected normally open and closed part as a simulated distribution path;

Calculate at least one of the sum of the power losses of each of the two distribution lines and the power supply leveling rate while moving the positions of the normally open and closed portions in the simulated distribution path, and select the positions of the normally open and closed portions based on the calculation result. Doing;

Repeating the setting of the simulated distribution path and the selection of the position of the normally open opening and closing part for the remaining normally open and closed portions in the list; And

Recording medium recording a program for implementing a method for operating a distribution automation system comprising the step of determining the position of the normally open and closed.