KR20210130488A - Energy Management System - Google Patents

Abstract

The present invention relates to an energy management system, and more particularly, to a method for determining a pressurized state of energy system equipment. A method for determining a pressurized state of energy system equipment of an energy management system according to an embodiment of the present invention includes: grouping energy system equipment by dividing the energy system equipment belonging to an energy system into an injection equipment group and a branch equipment group (S20); collecting a measured value of the energy system equipment that is measured from supervisory control and data acquisition (SCADA) (S30); generating electrical busbars in the energy system equipment based on a connection relationship between the energy system equipment and an open/close state value of a switchgear (S40); generating an independent management among the electrical busbars (S50); and determining whether or not the energy system equipment is pressurized (S60).

Description

Power system operating system {Energy Management System}

The present invention relates to a power system operating system, and more particularly, to a method for determining the pressurization state of a power system facility belonging to the power system operating system.

In general, a power system operating system is a system for planning, real-time operation and management of power supply for 24 hours. It is a system that monitors, controls, and measures the power system to efficiently supply electricity produced by nuclear, thermal, and hydroelectric power plants.

Electricity cannot be stored, is produced and consumed at the same time, and is transmitted at the speed of light, so human cognitive ability has limitations in monitoring the flow of electricity and controlling thousands of generators at the same time. Accordingly, computer programs to monitor and control generators and power grids were developed in earnest from the late 1960s.

Since the 1970s, the electric power industry has conceptualized the Remote Monitoring Control and Data Acquisition (SCADA) and the Electric Power System Management System (EMS). program has been developed. SCADA is a tool that supports the decision-making of power system operators, and tens of thousands of instruments installed in the power grid transmit real-time data to the central control center. Central power system operators measure the amount of power flowing through generators, substations, and transmission networks through a sophisticated EMS computer program, and calculate (simulation) the effect on the power system by assuming various failure situations that may occur. do. In addition, it prevents the entire system from collapsing due to a drop-out occurring in a part of the entire power system by overloading other parts, and at the same time efficiently controlling the power system by ensuring efficient power generation output and transmission.

SCADA and EMS are very essential parts for power system operators to make decisions, and if these systems do not operate properly, the power system status cannot be determined, increasing the possibility of accidents such as power outages.

The power system operating system is an injection facility such as a generator, a load, and a phase modifying equipment that supplies active/reactive power to the power system, and a line connecting to a substation or a device with a different voltage level. It is composed of branch facilities such as , transformer, circuit breaker and busbar.

1 shows a classification and node-based modeling method of such a power system facility. In the power system operating system, the connection relationship of power system facilities is configured based on nodes. Injection facilities and busbars have one node, and branch facilities and circuit breakers have two nodes on the inlet (inlet, input, from) side and the outlet (output, to) side.

The power system operating system acquires the active/reactive power of the injection facility and branch facility, the voltage of the bus bar, and the open/close state of the circuit breaker, and analyzes and operates it based on this.

2 is a view showing a visualization expression method of the power system equipment state acquisition value. In general, the configuration of power system facilities and the expression of the acquired values are displayed in the form of a single-line diagram in which three phases are simply displayed as one line as shown in the figure.

In the prior art, SCADA (Supervisory Control And Data Acquisition) of the power system operating system performs a function of acquiring and displaying a state value. However, since the state value of whether the equipment is pressurized or not is not acquired, it is difficult to intuitively judge equipment failure, local power outage, and whether equipment is pressurized in a single-line diagram. Since the state of the breaker and the acquisition value of active/reactive power do not correspond to whether the power facility is pressurized or not, it is also impossible to utilize it.

The present invention has been devised to solve the above problems, and its purpose is to analyze the connection relationship between power system facilities such as transmission lines, transformers, and generators and the open/close state of switchgear such as circuit breakers and disconnectors to determine the pressurized state of power system facilities. to display That is, a method for determining the pressurization state of the power system equipment is presented by analyzing the connection relationship between the facilities and the opening/closing state of the switchgear.

Here, based on classifying the node-based facility connection relationship into electrical busbars and systems, it is determined whether the facility is pressurized, and also whether the branch facility is one-sided open or not is determined. Whenever a change in the state of the switchgear is detected, the system configuration is re-evaluated and corrected.

The method for determining whether to pressurize the power system equipment of the electric power system operating system according to an embodiment of the present invention includes a power system equipment grouping step (S20) of dividing the electric power system equipment belonging to the electric power system into an injection equipment group and a branch equipment group; Collecting the measured values of the power system equipment measured in SCADA (Supervisory Control and Data Acquisition) (S30); generating electric busbars in the power system facilities based on the connection relationship of the power system facilities and the open/close state value of the switchgear (S40); generating an independent system among the electrical busbars (S50); and determining whether the power system equipment is pressurized (S60).

Here, the measured value of the power system facilities is characterized in that it includes the voltage measured value of the bus bar.

In addition, the opening and closing device is characterized in that the circuit breaker.

In addition, the step (S40) of generating the electrical bus includes grouping the power system facilities having an electrical connection relationship among the power system facilities and having the same voltage.

In addition, in the step (S50) of generating the independent system, a generator and a load are included in the electrical busbars, and the generator and the load are characterized in that each belongs to the separate electrical busbars.

In addition, the step (S50) of generating the independent grid is characterized in that a voltage value higher than a set value is detected from at least one bus bar among the electrical busbars.

In addition, the method further includes a step (S70) of determining whether one end of the line is opened after the step (S60) of determining whether the power system equipment is pressurized.

And, the step of determining whether one end is open (S70) includes determining as one end open when one end of the branch facility is not connected to another branch facility or injection facility.

According to the power system operating system according to an embodiment of the present invention, by analyzing the connection relationship between power system facilities such as transmission lines, transformers, and generators, and the opening/closing state of switching devices such as circuit breakers and disconnectors, the pressurization state of the power system facilities can be displayed. can That is, by analyzing the connection relationship of the facilities and the opening/closing state of the switchgear, the pressurization state of the power system equipment is determined.

Here, it is possible to determine whether the equipment is pressurized on the basis of classifying the node-based equipment connection relationship into electrical busbars and systems, and it can also determine whether the branch equipment is one-sidedly open. Whenever a change in the state of the switchgear is detected, the system configuration is re-evaluated and corrected.

1 is a diagram illustrating classification and node-based modeling of power system facilities according to the prior art.
Figure 2 is a visualization representation of the power system equipment state acquisition value according to the prior art.
3 is a flowchart of a method for determining a pressurization state of a power system facility according to an embodiment of the present invention.
4 is a block diagram of a power system operating system according to an embodiment of the present invention.
5 is a visualization representation of a power system facility state acquisition value.
6 is an independent system configuration diagram according to an embodiment of the present invention.
7 is an independent system configuration diagram according to another embodiment of the present invention.

Hereinafter, a preferred embodiment of the present invention will be described with reference to the accompanying drawings, which is intended to be described in detail enough that a person of ordinary skill in the art to which the present invention pertains can easily carry out the invention, thereby It does not mean that the technical spirit and scope of the invention are limited.

A power system operating system according to each embodiment of the present invention will be described in detail with reference to the drawings.

An energy management system (EMS) is a system that constantly plans, operates, and manages power supply to consumers or regions.

The main part of the Power System Operating System (EMS) is a part called the Supervisory Control and Data Acquisition (SCADA). SCADA is a tool that supports power system operators' decision-making, and transmits real-time data to the central control center through tens of thousands of instruments installed in the power grid. The central power system operators measure the amount of power flowing through generators, substations, and power grids through the EMS program, and assuming various failures, calculate the impact on the power system in real time and perform evaluation or simulation work. In addition, it controls the power system to be safely maintained by controlling so that the dropout occurring in a part of the entire power system causes an overload of the other parts and causes the entire system to collapse, while at the same time controlling the efficient power generation and transmission.

The present invention may be configured as a part of a power system operating system. In addition, it may be configured as an independent module linked to the power system operating system.

The main purpose of the method for determining whether the power system equipment is pressurized in the electric power system operating system according to an embodiment of the present invention is to determine the pressurization state of the electric power equipment and to determine whether one end of the branch equipment is opened. This is done by classifying the node-based power facility connection relationship into electrical busbars and systems, and determining whether the power facility is pressurized and whether the branch facility is open at one end.

3 is a flowchart of a method for determining a power system equipment pressurization state according to an embodiment of the present invention.

The method for determining whether to pressurize power system equipment of the electric power system operating system according to an embodiment of the present invention includes a power system equipment grouping step (S20) of dividing the electric power equipment into an injection group and a branch group; power system facility measurement value collection step (S30); generating an electrical bus bar (S40); independent lineage generation step (S50); determining whether power system equipment is pressurized (S60); It includes; determining whether the branch facility is open at one end (S70).

An electric power system refers to an electrical connection that spans a certain range of regions. A simple power system consists of one power plant, a concentrated load, and one transmission line connecting them.

The pressurized state refers to the state in which power is applied to the power system equipment and is operated, and it means the state in which the power is applied or the state of operation. This is also meant as a contrast to an open state or a power outage or fault condition. However, it does not simply mean a mechanically connected state, but also means an electrically connected state within the system.

The independent system refers to the power system of an independently divided unit. Independent grids are divided into generators that produce electricity and whether there are loads and busbars that are consumed in the grid. Among these independent systems, a power system with a pressurized state is called an effective independent system or simply an independent system, and a power system without a pressurized state is called an invalid independent system or a non-pressurized system.

The acquired value refers to the acquired value and the voltage measurement value for the open/closed state, and through this, the energized state (pressurized state) is determined.

As a first step, the power (system) facility grouping (S20) step divides the power system facilities into an injection facility and a branch facility and groups them. It is divided into two groups for the ease of processing within the algorithm as well as being used as a processing standard for one-sided openness.

Power system facilities refer to power facilities such as power generation facilities, power transmission/transformation facilities, and distribution facilities that are linked (connected) to the power system. Power system facilities include various devices or facilities constituting the power system, such as substations, substation busbars, generators, transmission lines, load facilities, ancestral facilities, and direct current transmission facilities.

Power system facilities include Circuit Breaker (CB), BusBar, Transformer (TR), Line (LN), Zero Impedance Line (ZLN), Generator (GEN), Includes phase modifying equipment (SH), load (LD), internal load (AUX), and static var compensator (SVC). This may refer to FIG. 1 .

An injection facility is a facility that supplies active/reactive power to the power system, such as a generator, a load, and an ancestral facility.

A branch facility is a facility that connects different regions or different voltage levels, for example, a line, a transformer, and the like.

As a second step, the step of collecting the measured values of the power system facilities (S20) reads the measured values of the power facilities measured by the SCADA of the power system operating system. The measured value of the power equipment includes the open/close state value of the switchgear and the voltage value of the (bus bar) bus bar.

The data collection unit 1200 collects and stores measurement values from at least one or more power system facilities 1100 , and transmits the collected measurement values to the control unit (system analysis unit) 1300 .

Here, the measured value may include information on the measured value of the voltage, current, power, etc. of the power system facility 1100, and the data collection unit 1200 periodically collects these measured values every predetermined time and collects the measured values at regular intervals for the control unit (system analysis). sub) (1300).

As a third step, the step (S40) of generating an electrical busbar of the power system facility generates an electric bus based on the connection relationship between the power system facilities 1100 and the open/close state value of the switchgear. The electrical busbar is created as a result of grouping nodes based on the connection relationship between the injection facility and the circuit breaker. Electrical busbar generation may be performed by the controller 1300 .

Electrical busbars refer to facilities with the same voltage. For example, it is a set of facilities having the same voltage among facilities connected to a specific bus bar. An electrical bus is a set of facilities with the same voltage in a specific power system (eg, a substation). Electrical busbars are groups based on electrical connection relationships.

As a fourth step, the independent system generation step (S50) of the power system facility refers to grouping only the electrical busbars belonging to the independent system among the electrical busbars generated in the previous step. Grouping the electrical busbars based on the connection with the branch facility in a node unit, whether the generator and load are included in the grouped electrical busbars, and whether the voltage above the standard value is measured in at least one busbar in the grouped electrical busbars Based on that, an independent lineage is created. At this time, the generator and the load must be on different electrical busbars. The independent system generation step S50 may be performed by the controller 1300 .

6 shows an example of a method for generating such an electric busbar and determining an independent system. That is, the contents of performing the third and fourth steps in the control unit 1300 will be described. Each name here is applied only to the embodiment of FIG. 6 .

The first bus bar 11 , the second bus bar 12 , and the third bus bar 13 are installed to be spaced apart from each other. The first bus bar 11 and the second bus bar 12 are connected by a first line 51 , and the second bus bar 12 and the third bus bar 13 are connected by a second line 52 . and a fifth circuit breaker 35 is provided between the second line 52 and the third bus bar 13 .

A first generator 21 is connected to the first bus bar 11 via a first transformer 41 and a first circuit breaker 31 , and a second transformer 42 and a second circuit breaker 32 are connected in parallel thereto. The second generator 22 is connected via

A first load 61 is connected to the second bus bar 12 through a third transformer 43 and a third circuit breaker 33 .

The third bus bar 13 is connected to the second load 62 through the fourth transformer 44 and the fourth circuit breaker 32 .

In the first generator 21, the first circuit breaker 31 is opened to form one electrical bus bar. That is, one end of the node of the first circuit breaker 31 forms one electrical bus bar. This will be referred to as a first bus A1.

The equipment between the first circuit breaker 31 and the first transformer 41 has an independent voltage different from other parts, so it forms another electrical busbar. That is, between the node of the other end of the first breaker 31 and the node of one end of the first transformer 41 forms one electrical bus bar. This is referred to as a second bus A2.

Another electrical bus is formed between the first bus bar 11 and the node of one end of the first line 51 , and this is referred to as a third bus A3. Here, the line is viewed as one power facility and the voltage drop appears, so both ends have different voltages.

There is a second circuit breaker 32 between the second generator 22 and the second transformer 42 , but it is closed to achieve the same voltage. Therefore, one electrical bus is formed and it is referred to as the fourth bus (A4).

A fifth bus bar A5 is formed between the node of the other end of the first line 51 and the second bus bar 12 . Since the same voltage is also formed between the node of one end of the second line 52 and the second bus bar 12 as the other end of the first line 51 , it is included in the fifth bus bar A5 .

There is a third circuit breaker 33 between the first load 61 and the third transformer 43 , but since it is closed, the same voltage is achieved. Accordingly, one electrical bus is formed and it is referred to as the sixth bus A6.

The other end node of the second line 52 and one end node of the fifth circuit breaker 35 form the seventh bus A7.

Since the fifth circuit breaker 35 is open, the other end node of the fifth circuit breaker 35 and the third bus bar 13 connected thereto form one electrical bus bar and is referred to as an eighth bus bar A8.

A fourth circuit breaker 31 is provided between the fourth transformer 44 and the second load 62 , but is closed to achieve the same voltage, so that one electrical bus is formed, and this is referred to as the ninth bus A9.

In this way, an electrical bus diagram, which is a set of power facilities having the same voltage value, is prepared by taking the node for each power facility as a unit and taking into account the open/close state of the circuit breaker and whether the voltage changes according to the transformer.

In the power system of FIG. 6 , the first bus bar A1 is separated from other bus bars by opening the breaker. In addition, the 8th busbar A8 and the ninth busbar A9 disposed downstream thereof are also separated from the other busbars by opening the fifth breaker 35 . Accordingly, the second bus bar A2, the third bus bar A3, the fourth bus bar A4, the fifth bus bar A5, the sixth bus bar A6, and the seventh bus bar A7 are electrically connected to each other and together It forms a single independent system (10) forming a group with working electrical connections.

That is, the independent system composed of the second bus bar A2 to the seventh bus bar A7 includes a generator and a load, and is in a state of being electrically connected to each other, thereby forming a pressurized state. That is, in each power facility in an independent system, a voltage higher than the reference value is detected from at least one bus bar. (The first bus bar A1, the eighth bus bar A8, and the ninth bus bar A9 are in a state of being electrically isolated and the voltage is not detected, so they are excluded from the independent system.)

In this way, it is possible to classify the pressurized state in the power system and display it so that the power system operator can easily recognize it.

The control unit (system analysis unit) 130 determines whether the electric busbar is classified and whether there is an independent system according to the pressurization state, and the display unit 1400 displays it to the outside.

As a fifth step, it is determined that the power equipment existing in the independent grid is pressurized. The target of pressurization judgment is branch equipment, injection equipment, and bus bar equipment.

Forming the power facilities in a pressurized state may have the same meaning as the power facilities forming an independent system. That is, it can be expressed that the power facilities forming an independent system are pressurized. If an independent system means a group of pressurized facilities among power facilities, the pressurized state can be viewed as a viewpoint that expresses the characteristics of each power facility, that is, the state of each facility of the injection facility, branch facility, and bus bar.

As the sixth step, it is checked whether one end is open for branch facilities within an independent system.

The criteria for judging one-sided openness are as follows. If the From/To side of the branch facility is not connected with other branch facilities or injection facilities, the side is judged to be open at one end. Here, the case where the one-end open side is connected to the bus bar and is pressurized with a voltage greater than or equal to the reference value is treated as an exception.

In FIG. 6 , the second line 52 , which is a line connecting the fifth bus bar A5 and the seventh bus bar A7 , does not have a connection relationship with other facilities on the seventh bus bar A7 side, so it cannot be determined to be open at one end. have. That is, the second line 52 is opened at one end.

The pressurization state of the equipment is newly evaluated every cycle when the acquired value is updated in the SCADA. When a new measurement value is input from the data collection unit 1200 , the control unit 1300 updates the independent system, whether pressurized or not, and whether one end is open.

5 shows an example of visualization according to whether the bus bar is pressurized. Based on the result according to the method of determining whether to pressurize the power system equipment in the manner described above, a single line diagram as shown in FIG. 5 may be worked to provide different visual effects depending on whether pressurization is applied. Such visualization may be performed on the display unit 1400 .

With reference to another embodiment shown in FIG. 7 , a method for determining whether an independent system is generated and pressurized according to the determination method of the present invention will be described. Names and symbols herein apply only to the embodiments of this figure.

7 shows a facility comprising two power plants and two substations. Here, "□" and "■" are breaker symbols, and "□" indicates an open state and "■" indicates a closed state. Also, the "8" designation indicates a transformer.

The first power plant 100 has one generator, one transformer, three circuit breakers and one bus bar. The first power plant 100 has a first circuit breaker 122 , a second circuit breaker 124 , and a third circuit breaker 126 connected to the first bus bar 110 . The first generator 140 is connected to the first bus bar 110 via the first transformer 130 and the third circuit breaker 126 .

The three circuit breakers 122 , 124 , and 126 connected to the first bus bar 110 are all closed to form one electrical bus bar. One end of the first transformer 130 connected to the first circuit breaker 122, the second circuit breaker 124, the third circuit breaker 126 and the third circuit breaker 126 forms one electrical bus bar, It is called B1).

The other end of the first transformer 130 and the first generator 140 connected thereto form a second bus B2.

That is, the first power plant 100 has a first bus bar B1 and a second bus bar B2.

The first substation 200 has one load, one transformer, four circuit breakers and one bus bar.

The first power plant 100 and the first substation 200 are connected by a first line 510 . The first line 510 is connected between the first breaker 122 of the first power plant 100 and the fourth breaker 222 of the first substation 200 .

The fifth circuit breaker 224 is connected to the second substation 300 through a fifth line 550 .

The first load 240 is connected to the second bus bar 120 through the second transformer 230 and the sixth circuit breaker 226 .

The fourth circuit breaker 122 is opened, and the other end of the first line 510 forms a third bus bar B3.

The fifth circuit breaker 124 and the sixth circuit breaker 126 are closed to form a fourth bus bar B4 together with the second bus bar 120 .

The seventh circuit breaker 228 is opened so that the other end of the seventh circuit breaker 228 forms a fifth bus bar B5.

The first load 240 forms a sixth bus bar B6.

The first substation 200 has a third bus bar B3, a fourth bus bar B4, a fifth bus bar B5, and a sixth bus bar B6.

The second substation 300 has one load, one transformer, four circuit breakers, and one bus bar.

The first power plant 100 and the second substation 300 are connected by a second line 520 . The second line 520 is connected between the second breaker 124 of the first power plant 100 and the eighth breaker 322 of the second substation 300 .

The ninth circuit breaker 324 is connected to the first substation 300 through a fifth line 550 .

The second load 340 is connected to the third bus bar 120 through the third transformer 330 and the tenth circuit breaker 326 .

The eighth circuit breaker 322 and the ninth circuit breaker 324 are closed to form a seventh bus bar B7 together with the third bus bar 130 .

The tenth circuit breaker 326 is opened, and the other end of the tenth circuit breaker 326 forms an eighth bus bar B8.

The eleventh circuit breaker 328 is opened, and the other end of the eleventh circuit breaker 328 forms a ninth bus bar B9.

The second load 340 forms a tenth bus bar B10.

The second substation 300 has a seventh bus bar B7, an eighth bus bar B8, a ninth bus bar B9, and a tenth bus bar B10.

The second power plant 400 has one generator, one transformer, two circuit breakers and one bus bar.

The second power plant 400 and the first substation 200 are connected by a third line 530 . The third line 530 is connected between the twelfth breaker 422 of the second power plant 400 and the seventh breaker 228 of the first substation 200 .

The second power plant 400 and the second substation 300 are connected by a fourth line 540 . The fourth line 540 is connected between the thirteenth breaker 422 of the second power plant 400 and the tenth breaker 328 of the second substation 300 .

The twelfth circuit breaker 422 and the thirteenth circuit breaker 424 are closed to form an eleventh bus bar B11 together with the fourth bus bar 140 .

The second generator 440 is connected to the fourth bus bar 140 via the fourth transformer 430 . The second generator 440 forms a twelfth bus bar B12.

The second power plant 400 has an eleventh bus bar B11 and a twelfth bus bar B12.

The power system shown in the embodiment of FIG. 7 includes first bus bars B1 to 10 bus bars B10 connected to the first bus bar 110 , the second bus bar 120 , and the third bus bar 130 . It is divided into a first independent system (C1) including a first independent system (C1) and a second independent system (C2) including an eleventh bus bar (B11) and a twelfth bus bar (B12) connected to the fourth bus bar (140).

Here, the first independent system (C1) has a generator and a load disposed on a separate bus, and is evaluated as an effective independent system because it is electrically connected to each other and a voltage is formed. That is, the first independent system (C1) is placed in a pressurized state.

On the other hand, the first independent system (C1) has only a generator, is not electrically connected to each other, and is evaluated as an invalid independent system because no voltage is formed. That is, the first independent system (C1) is not placed in a pressurized state.

And, the one-end open line is as follows.

The terminal connected to the fourth circuit breaker 222 in the first line 510, the terminal connected to the seventh circuit breaker 228 in the third line 530, and the terminal connected to the 11th circuit breaker 328 in the fourth line 540 is open at one end.

According to the power system operating system according to an embodiment of the present invention, by analyzing the connection relationship of power system facilities such as transmission lines, transformers, and generators and the opening/closing state of switchgear such as circuit breakers and disconnectors, the pressurization state of the power system equipment is displayed. can That is, by analyzing the connection relationship of the facilities and the opening/closing state of the switchgear, the pressurization state of the power system equipment is determined.

Here, it is possible to determine whether the facility is pressurized based on the node-based facility connection relationship divided into electrical busbars and systems, and also it can be determined whether the branch facility is one-sidedly open. Whenever a change in the state of the switchgear is detected, the system configuration is re-evaluated and corrected.

The embodiments described above are embodiments for implementing the present invention, and various modifications and variations may be made by those of ordinary skill in the art to which the present invention pertains 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 spirit of the present invention, but to explain, and the scope of the technical spirit of the present invention is not limited by these embodiments. That is, the protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be interpreted as being included in the scope of the present invention.

1000 power system operating system 1100 power system equipment
1200 data collection unit 1300 control unit
1400 display unit

Claims (8)

A power system equipment grouping step (S20) of dividing the electric power system equipment belonging to the electric power system into an injection equipment group and a branch equipment group;
Collecting the measured values of the power system equipment measured in SCADA (Supervisory Control and Data Acquisition) (S30);
generating electric busbars in the power system facilities based on the connection relationship of the power system facilities and the open/close state value of the switchgear (S40);
generating an independent system among the electrical busbars (S50);
Determining whether to pressurize the power system equipment of the electric power system operating system comprising a; determining whether the electric power system equipment is pressurized (S60). The method of claim 1, wherein the measured values of the power system facilities include a voltage measurement value of a bus bar. The method of claim 1, wherein the switchgear is a circuit breaker. The power system of claim 1, wherein generating the electrical busbar (S40) comprises grouping power system facilities having an electrical connection relationship among the power system facilities and having the same voltage. How to determine whether equipment is pressurized. The power system operating system according to claim 1, wherein in the step (S50) of generating the independent system, a generator and a load are included in the electrical busbars, and the generator and the load belong to the separate electrical busbars, respectively. How to determine whether power system equipment is pressurized. According to claim 1, wherein in the step (S50) of generating the independent grid, a voltage value higher than a set value is detected in at least one bus bar among the electrical busbars. Way. The method of claim 1, further comprising the step (S70) of determining whether one end of the line is open after the step (S60) of determining whether the power system equipment is pressurized. The power of the power system operating system according to claim 7, wherein in the step (S70) of determining whether the one-end is opened or not, when one end of the branch facility is not connected to another branch facility or an injection facility, it is determined as open-ended. How to determine whether system equipment is pressurized.

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