JP7061204B2 - Power transmission capacity analysis device, power transmission capacity analysis method and computer program - Google Patents

Description

The present invention relates to a transmittable capacity analyzer, a transmittable capacity analysis method and a computer program.

The technique described in Patent Document 2 is known as a technique for calculating the transmittable capacity of an electric power system. In the technique of Patent Document 2, when the discrimination result of the stability discrimination is shown to be stable, the transmission amount is increased and the stability calculation and the stability discrimination are continued in parallel, but the discrimination result is unstable. If it indicates that, the execution of the stability calculation and the stability determination is stopped, and the transmission amount immediately before the instability is recognized as the transmission limit value.

Japanese Unexamined Patent Publication No. 2002-51469

In the prior art, the transmission limit value is calculated by repeatedly executing data generation for analysis, calculation of short-circuit current, and determination of overload while increasing the transmission amount. When increasing the amount of power transmission, it is necessary to increase the load amount of the electric power system and increase the amount of power generation in response to the increase in the load amount.

In the past, it was relatively easy to assume an increasing load amount and a power generation amount corresponding to an increase in the load amount based on past results and a generator operation plan for each electric power company. However, in recent years, it is difficult to predict load fluctuations in the power system because renewable energy power generation facilities such as photovoltaic power generation or wind power generation are often connected to the power system. Furthermore, if the power transmission and distribution business is separated from the power generation company, the operation plan of the generator will depend on the power generation company. Selection becomes difficult.

That is, the conventional technique is applicable in an era when the configuration and operation of the electric power system are stable, and it is difficult to calculate the transmission limit value in an environment where the configuration and operation management of the electric power system changes.

Furthermore, in the past, changes in the power system could be predicted relatively easily, so the amount of calculation was limited, but the amount of renewable energy introduced into the power system increased, and the operation pattern of generators was predicted. If it becomes difficult, the amount of calculation will increase, and it will be difficult to obtain the transmission limit value efficiently and accurately.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a power transmission capacity analysis device, a power transmission capacity analysis method, and a computer program capable of accurately and efficiently analyzing power transmission capacity. There is something in it.

In order to solve the above problems, the power transmission capacity analysis device according to one viewpoint of the present invention is a power transmission capacity analysis device that analyzes the power transmission capacity of the power system, and each of a plurality of groups set in the power system is set. The stability of the power system in each group based on the group evaluation section generator that generates the group evaluation section for evaluation for each group, each group evaluation section, and a plurality of predetermined stability evaluation indexes. Based on the evaluation results of the stability evaluation unit and the stability evaluation unit, which evaluates each stability evaluation index, at least one of the stability evaluation indexes to be analyzed is determined for each group. It is equipped with a target stability evaluation index judgment unit and a power transmission capacity analysis unit that calculates the power transmission capacity when the load increases in each group based on the judgment results of the target stability evaluation index judgment unit. ..

According to the present invention, the stability evaluation index to be analyzed can be determined for each group set in the power system, and the transmittable capacity can be analyzed for each group for the stability evaluation index to be analyzed, which is efficient. Moreover, the transmittable capacity can be calculated accurately.

It is explanatory drawing which shows the structural example of the power transmission capacity analysis apparatus of a power system. It is a flowchart which shows the whole operation of the power transmission capacity analysis apparatus. It is a flowchart which shows the process of creating a cross section for load group evaluation. It is a flowchart which shows the process of calculating a value (stability) based on a stability evaluation index. It is a flowchart which shows the harsh assumed accident / stability evaluation index judgment processing. It is a flowchart which shows the detailed stability evaluation analysis processing. It is a flowchart which shows the whole operation of the power transmission possible capacity analysis apparatus which concerns on 2nd Embodiment. It is a flowchart which shows the process which evaluates and analyzes the stability in detail across a plurality of load groups. An example of a graph that three-dimensionally expresses the transmittable capacity when the load is increased in multiple dimensions. It is explanatory drawing which shows the example of the relationship of the load group which concerns on 3rd Example.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the present embodiment, a plurality of groups are set in the power system, and the value of the stability evaluation index is calculated for each group to calculate the transmittable capacity for each group. In other words, in the present embodiment, the power system to be analyzed is virtually divided into a plurality of groups, and the increase in load and the change in the value of the stability evaluation index are calculated for each group.

In the present embodiment, as described later, when the load of each group is increased in the reference cross section for group evaluation, the value of any of the plurality of stability evaluation indexes in each group (the value of the stability evaluation index ( Stability) is affected. For the stability evaluation index judged to be affected, the limit value that can maintain stability is obtained by analyzing the change when the load of the group is increased. The transmission capacity of the entire group is calculated based on the limit value of the stability evaluation index in each group. The transmission capacity of the entire group is calculated based on the lowest limit value in each group.

There are multiple ways to set groups. For example, a group may be set for each area on the map provided with the power system. Or, for example, a general household group, a factory group, a group of consumers with renewable energy power generation equipment, a group of consumers with power storage equipment, a group with high daytime power consumption, a group with high nighttime power consumption, and the like. It is also possible to set a group according to the characteristics of the consumer. Alternatively, groups may be set according to the characteristics of the power generation device, such as a group of solar power generation devices, a group of wind power generation devices, a group of gas turbine power generation devices, and a group of power storage devices. A group of people involved in the power system may be set, such as a group of power generation companies and a group of power transmission and distribution companies. Alternatively, a group can be set for each device constituting the power system, such as a substation unit, a feeder line unit, and the like. A plurality of layers may be set for one power system, and different groups may be set for each layer. For example, the transmittable capacity of the power system may be analyzed in a plurality of layers, that is, a layer having a group for each customer characteristic and a layer having a group for each business operator.

The power transmission possible capacity analysis device 1 according to the present embodiment focuses on the stability evaluation index of the analysis target that is affected by the change (effect) due to the load increase, not all of the stability evaluation indexes, and is stable while increasing the load amount. The change in the value of the degree evaluation index is analyzed in detail. Therefore, the amount of calculation can be reduced and the transmittable capacity can be calculated efficiently as compared with the case of calculating all the stability evaluation indexes.

In the transmittable capacity analysis device according to the present embodiment, as an example, the loads in each region simulated in the power system model are grouped based on the load increase / decrease characteristics with respect to time changes, temperature changes, and the like. By grouping the loads, when increasing the transmission amount, the distribution of the increase / decrease in the load amount can be determined according to the assumption of the system change, instead of increasing the entire system uniformly.

When increasing or decreasing the amount of power generation in response to an increase or decrease in the amount of load, it is possible to incorporate a generator operation plan based on the market principle by incorporating electricity market data. Thereby, in the present embodiment, it is possible to create a highly accurate power system state.

In the process of calculating the value based on each stability evaluation index, for example, the calculation amount is reduced by calculating according to the following method.

First, in the grid model before increasing the transmission volume, the power system is analyzed to evaluate each stability evaluation index. Next, a certain group is selected from each set group, the load amount of the selected group is increased by a certain amount, and the power system analysis is performed again. Then, the change in the value of each stability index before and after the load increase is quantified. This makes it possible to determine which stability index the load increase in the target group affects. From the judgment result, it is possible to carry out a detailed analysis by paying attention to the stability index having a large influence among the stability evaluation indexes. Since the stability evaluation index, which is greatly affected by the load fluctuation, is analyzed, the amount of calculation can be reduced as compared with the case of analyzing all the stability evaluation indexes.

The following configurations are also disclosed in this embodiment.

(Structure 1)
Means 110 for reading system model data 120, system state data 121, and power market data 123, and creating an evaluation cross section for each load group based on the set load group information 122, assumed accident definition data 124, and limit determination threshold data 125. When,
Means 111 for performing a system analysis simulation for evaluating the stability of the power system based on the created evaluation cross section, and
A means 112 for determining a severe assumed accident and stability from the result of the system analysis, and
It has means 113 for performing detailed stability evaluation analysis based on the determination result.
A device that calculates the transmittable capacity as the load of each load group increases.

(Structure 2)
The apparatus 1 according to the configuration 1, further comprising a means 113 for performing detailed stability evaluation analysis (S60) when the load amount is increased in a multidimensional manner over a plurality of load groups.

(Structure 3)
A means (S64) of the device 1 according to the configurations 1 and 2, wherein the power transmission capacity when the load amount is increased in multiple dimensions is expressed in a three-dimensional graph, and the degree of harshness is expressed by the frequency of colors or icons. ) Has a transmittable capacity analyzer.

(Structure 4)
The transmittable amount calculation unit 113 calculates the transmittable capacity for each group by distributing the increase amount of the load to each group.

(Structure 5)
The power transmission possible capacity analysis unit 113 represents the relationship between the load increase and the stability in each of the groups in a three-dimensional graph.

(Structure 6)
The group evaluation section generator 110, which generates a group evaluation section for evaluating at least one group installed in the power system, generates a reference section of the power system based on the configuration and state of the power system. By increasing the load in the group and selecting a predetermined generator corresponding to the increase in the load, a group evaluation cross section for the group is generated for each group.

(Structure 7)
The group is set for each area of the power system.

(Structure 8)
The group is set based on the characteristics of the consumer included in the power system or the characteristics of the power generation device.

(Structure 9)
The group is set for each business operator participating in the electric power system.

(Structure 10)
The group is set for each device constituting the power system.

According to this embodiment, evaluation cross sections can be created for each group (which can also be called a load group) set in the power system, and detailed analysis can be performed on the indicators to be noted in each group. As a result, the accuracy of calculating the transmittable capacity can be improved, and the amount of calculation can be reduced to shorten the time required to calculate the transmittable capacity. Further, according to the present embodiment, since the calculation accuracy of the transmittable capacity is improved, it is not necessary to set a large margin as in the conventional case. Therefore, according to the present embodiment, the power system can be efficiently operated and controlled.

The first embodiment will be described with reference to FIGS. 1 to 6. FIG. 1 shows the functional configuration of the power transmission capacity analysis device 1 of the electric power system. In the following, the power transmission capacity analysis device 1 may be abbreviated as the analysis device 1.

The analysis device 1 is configured by using, for example, a computer including a microprocessor (CPU: Central Processing Unit), a memory (main storage device) 11, a storage device (auxiliary storage device) 12, and a communication interface unit 13.

The communication interface unit 13 of the analyzer 1 can communicate with the computer terminal 2 and another computer system 3 and the storage medium 4 via the communication network CN.

The memory 11 is a computer for realizing each function such as a load group evaluation cross-section creation unit 110, a stability calculation unit 111, a severe assumed accident / stability evaluation index determination unit 112, and a detailed stability evaluation analysis unit 113. The program is stored.

The load group evaluation cross-section creation unit 110 is an example of the “group evaluation cross-section generation unit”, and creates a cross section for evaluating the stability based on the stability evaluation index when the load on the load group is increased. .. In the following description, the load group may be abbreviated as "group".

The stability calculation unit 111 is an example of the "stability evaluation unit", and calculates the stability (which may also be called the stability evaluation index value) based on the stability evaluation index. The severe assumed accident / stability evaluation index determination unit 112 is an example of the “target stability evaluation index determination unit”, and evaluates the stability when it is assumed that a predetermined severe accident has occurred. The detailed stability evaluation analysis unit 113 is an example of the “power transmission possible capacity analysis unit”. The contents of these functions 110 to 113 will be described later.

The storage device 12 stores, for example, system model data 120, system state data 121, load group setting data 122, power market data 123, assumed accident definition data 124, limit determination threshold data 125, and power transmission capacity data 126. There is. The system model data 120 to the limit determination threshold data 125 are data input to the analysis device 1. The transmittable capacity data 126 is data output from the analysis device 1. The storage device 12 may store a computer program or the like (not shown) for realizing each function 110 to 113.

The system model data 120 is a model of the power system to be analyzed. The system state data 121 represents output information of a generator (not shown) included in the power system, a state of a switch (not shown), and the like. The load group setting data 122 is the data of the load group set in the power system. The electricity market data 123 is market data for buying and selling electric power, and includes the selling price of electric power and the like. The assumed accident definition data 124 is data that defines accidents that may occur in the power system. The limit determination threshold data 125 is a limit determination threshold used for determining stability based on the stability index. The transmittable capacity data 126 is a calculation result of the amount of electric power that can be transmitted to the electric power system to be analyzed.

The other computer system 3 is, for example, a computer system related to the operation or control of an electric power system such as a central command center system. The analysis device 1 may be communicably connected to another computer system other than the computer system involved in the operation or control of the power system.

The computer terminal 2 is a terminal used by a user such as a person in charge of analysis. By using the computer terminal 2, the user inputs information or instructions to the analysis device 1 and confirms the information from the analysis device 1. Therefore, the computer terminal 2 includes an information input device and an information output device (both not shown). The information input device includes, for example, a pointing device such as a keyboard and a mouse, a touch panel, and a voice input device. The information output device includes, for example, a display, a speech synthesizer, a printer, and the like. At least one or both of the information input device and the information output device may be configured by using VR (Virtual Reality) or AR (Augmented Reality).

The storage medium 4 stores computer programs and / or data in a form readable by a computer. Examples of the storage medium 4 include a hard disk, a flash memory, and the like. By connecting the storage medium 4 and the analysis device 1 via the communication interface unit 13 or the input / output interface unit (not shown), a computer program or data is transferred from the storage medium 4 to the storage device 12 of the analysis device 1. Can be memorized.

The overall operation of the power transmission possible capacity analysis device 1 will be described with reference to the flowchart of FIG. The process of creating the load group evaluation cross section (S10) by the load group evaluation cross-section creation unit 110 will be described with reference to the flowchart of FIG.

First, the group evaluation cross-section creation unit 110 acquires the system model data 120 and the system state data 121 (S11), and creates a system cross section (reference cross section) as a reference for evaluation from these data 120.121. (S12).

The group evaluation cross-section creation unit 110 acquires system model data 120, system state data 121, load group setting data 122, and power market data 123 (S13), and from these data 120 to 123, a cross-section for load group evaluation. Is created for each load group (S14).

When creating the load group evaluation cross section, a certain amount of load δPload is increased for only one group (S15), and the generator output δPgen is increased so as to correspond to the load δProad (S16, S17).

The generator to be increased in output is selected from the generators having the lowest unit price of power generation based on the power market data 123 (S16). A cross section for group evaluation for one group is created by the above-mentioned procedures S15 to S17. For other load groups, a cross section for group evaluation is created by the same procedure. Finally, as many cross sections for group evaluation are created as there are load groups. Hereinafter, the cross section for group evaluation may be abbreviated as the cross section for evaluation.

The stability calculation process (S20) by the stability calculation unit 111 will be described with reference to the flowchart of FIG. The stability calculation unit 111 acquires the reference cross section created in step S10 of FIG. 3, the cross section for evaluation of each load group, and the assumed accident definition data 124 (S21), and calculates the stability (S22 to S24).

First, the stability calculation unit 111 simulates the reference cross section, and then performs the same simulation for each load group evaluation cross section (S22).

That is, the stability calculation unit 111 simulates the behavior of the power system when an assumed accident occurs with the system analysis software (not shown) based on the assumed accident definition data 124 for the reference cross section. In this simulation, various stability evaluation indexes such as overload, voltage deviation, voltage stability, transient stability, frequency fluctuation, and dynamic stability are simulated according to the evaluation indexes.

The stability calculation unit 111 simulates the behavior of the power system for each group (S23) when an assumed accident occurs in the cross section for group evaluation (S24).

The process (S30) executed by the severe assumed accident / stability evaluation index determination unit 113 will be described with reference to the flowchart of FIG. The severe assumed accident / stability evaluation index determination unit 112 acquires the simulation result analyzed in step S20 shown in FIG. 4 and the limit determination threshold data 125 (S31), and is stable in the event of a severe assumed accident. The change in the degree evaluation index is determined for each group (S32), for each assumed accident (S33), and for each stability evaluation index (S34). Hereinafter, the severe assumed accident / stability evaluation index determination unit 112 may be abbreviated as the determination unit 112.

The determination unit 112 compares various stability evaluation indexes obtained by simulating the reference cross section with various stability evaluation indexes obtained by simulating the cross section for load group evaluation (S35). The determination unit 112 sets the stability evaluation index in the reference cross section as _{Si, c, 0} (i = evaluation index type, c1 = assumed accident type) and the stability evaluation index in the load group evaluation cross section _{, Si, c,} When it is set to ₁ , the changes ki and _c of the stability evaluation index when a certain amount of load δPload is increased are calculated from the following (Equation 1).

k _{i. c} = (S _{i, c, 1} -S _{i, c, 0} ) / ΔP _load ... (Equation 1)

The determination unit 112 sets the limit threshold value of the stability evaluation index to _{Si, limit} , and calculates the load increase amount _{Pi, c, x} that satisfies the following (Equation 2).

S _{i, c, 0} + ki _{, c} × P _{i, c, x} ≧ S _{i, limit} ... (Equation 2)

When the load increase amount _{Pi, c, x} obtained in (Equation 2) exceeds the screening threshold _threshold , the stability evaluation index in the severe assumed accident is determined to be a detailed stability evaluation target. do. The screening threshold value _Pthhold can be determined based on a value obtained by subtracting the total load amount in the reference cross section from the total load amount that is maximum during the evaluation target period in the power system to be analyzed. The determination unit 112 selects the stability evaluation index to be evaluated in detail by performing the above-mentioned processing for all the severe assumed accidents and the stability evaluation index (S33, S34).

The process executed by the detailed stability evaluation analysis unit 113 will be described with reference to the flowchart of FIG.

The detailed stability evaluation analysis unit 113 acquires the determination result of step S30 shown in FIG. 5, and evaluates (analyzes) the index selected as the detailed stability evaluation target in detail (S41 to S47). Hereinafter, the detailed stability evaluation analysis unit 113 may be abbreviated as the analysis unit 113.

The analysis unit 113 carries out a simulation for each assumed accident (S41) considered to be severe in the power system to be analyzed and for each stability evaluation index determined to be a detailed evaluation target (S42) (S42). S43). The analysis unit 113 simulates in a cross section in which the load amount of the group is increased by the calculated amount _{Pi, c, x} with respect to the stability evaluation index determined in step S30 (S43).

If it is determined to be "stable" as a result of the simulation (S44: YES), the load amount is further increased by a certain amount and the simulation is performed (S45). The analysis unit 113 repeatedly executes the increase in load and the simulation (S45) until the simulation result is determined to be "unstable" (S46: YES), and finally power transmission in the cross section determined to be "stable". The possible quantities Pflow _{i, c, limit} are calculated (S47).

On the other hand, when it is determined to be "unstable" as a result of the simulation (S44: NO), the analysis unit 113 reduces the load amount by a certain amount and performs the simulation (S48). The analysis unit 113 repeatedly executes the load reduction and the simulation until it is determined to be "stable" (S49: YES) (S48), and the power transmission possible amount Pflow _{i, in the cross section initially determined to be "stable", c, limit} is calculated (S50).

The above processes S43 to S50 are carried out for each of the various stability indexes in all assumed failures determined to be the targets of detailed stability evaluation, and the smallest transmittable amount min (Pflow _{i, c, limit} ) is set in the target group. Judged as the capacity that can be transmitted due to the increase in load. Further, the analysis unit 113 determines the transmittable capacity due to the increase in the load amount in each group by performing the processes S42 to S50 for all the groups (S41).

In this embodiment configured in this way, the transmittable capacity of the power system to be analyzed can be accurately and efficiently obtained.

That is, in this embodiment, the power system to be analyzed is divided into virtual group units, evaluation cross sections are created for each group, and the stability evaluation index that should be noted in each group is analyzed in detail. As a result, according to the analysis device 1 according to the present embodiment, it is possible to improve the calculation accuracy of the transmittable capacity, reduce the calculation amount, and shorten the time required to calculate the transmittable capacity.

According to this embodiment, since the calculation accuracy of the transmittable capacity can be improved, the margin can be set smaller than before, and the power system can be operated and controlled efficiently.

The second embodiment will be described with reference to FIGS. 7 to 9. Since each of the following examples including this embodiment corresponds to a modified example of the first embodiment, the differences from the first embodiment will be mainly described.

FIG. 7 is a flowchart showing the overall operation of the power transmission possible capacity analysis device 1A. The analysis device 1A according to the present embodiment multidimensionally increases the load amount across a plurality of groups, and expresses the calculated power transmission possible capacity as a three-dimensional graph. Comparing the analysis device 1A of the present embodiment shown in FIG. 7 with the analysis device 1 of the first embodiment described in FIG. 2, in the analysis device 1A of the present embodiment, step S40 of "detailed stability evaluation analysis" is performed. Instead of, step S60 of "detailed stability evaluation analysis across a plurality of groups" is provided.

The detailed stability evaluation analysis process (S60) of this embodiment will be described with reference to the flowchart of FIG. This process is executed by the detailed stability evaluation analysis unit 113 possessed by the analysis device 1A. Although the illustration of the detailed stability evaluation analysis unit according to this embodiment is omitted, it can also be shown as the detailed stability evaluation analysis unit 113A if it matches the code of the analysis device 1A. In the following, the operating subject will be described as the analysis device 1A.

The analysis device 1A acquires the determination result in step S30 described in FIG. 5 (S61), and evaluates the assumed accident and stability which are considered to be severe in any of the plurality of groups to be evaluated. Select an index (S62).

The analysis device 1A calculates the power transmission possible amount by simultaneously increasing the load amount of a plurality of groups with respect to the assumed accident and the stability evaluation index selected as the evaluation target (S63). The initial value of the load to be increased is the smallest load among the load increases Pi _{, c, x} obtained in step S30 with respect to the assumed accident and stability evaluation index of the target among the plurality of groups to be evaluated. It can be obtained by apportioning the amount of increase by the number of groups. Then, the transmittable capacity is calculated by the same process as described above in FIG. 6 (S63).

The analysis device 1A calculates the transmittable capacity at each ratio while changing the proportional division ratio, changes the icons and colors according to the size of the transmittable capacity, and draws them in a graph, as shown in FIG. Create a multidimensional graph (S64).

The multidimensional graph shown in FIG. 9 is an example of a "three-dimensional graph". In FIG. 9, the evaluation axis of the group G1, the evaluation axis of the group G2, and the evaluation axis of the group G3 are shown, and the transmittable capacity across each group is indicated by a triangle mark or a cross mark. By visually recognizing the graph as shown in FIG. 9, the user can visually grasp, for example, the distribution of the power transmission capacity, the tendency of the load increase to be noted in operation, and the like.

This embodiment configured in this way also has the same effect as that of the first embodiment. Further, according to this embodiment, it is possible to obtain a severe assumed accident and a system stability evaluation index for each group more quickly than before. Therefore, the analysis device 1A of this embodiment is used not only at the time of system planning but also at real-time system operation in a power system in which a large amount of renewable energy is introduced or in a power transmission / distribution company that cannot operate a generator plan according to its own plan. Even at times, it is possible to grasp the events that should be noted, that is, severe accidents and the stability index that makes the accidents severe, and prepare in advance.

The third embodiment will be described with reference to FIG. FIG. 10 is an explanatory diagram schematically showing the relationship between load groups. In the example shown in FIG. 10, a plurality of groups G1 to G7 are set in a mesh shape with respect to the target power system. The interconnection points between the groups are electrically connected by the path Li.

As described above, each group can be set from various viewpoints, for example, the characteristics of the load over time, the type of consumer, the type of operator, the substation unit, and the feeder line unit of the substation. can.

The present invention is not limited to the above-described embodiment, and may include various modifications. For example, the above-described embodiment has been described in detail in order to explain the present invention in an easy-to-understand manner, and is not necessarily limited to the one including all the described configurations.

It is also possible to add the configuration of another embodiment to the configuration of one embodiment. It is also possible to add / delete / replace a part of the configuration of each embodiment with another configuration. The technical features included in this embodiment can be combined in addition to the combinations described in the claims.

1,1A: Power system transmission capacity analyzer, 2: Computer terminal, 3: Other computer system, 110: Load group evaluation section creation unit, 111: Stability calculation unit, 112: Severe assumed accident / stability Evaluation index judgment unit, 113: Detailed stability evaluation analysis unit

Claims (10)

It is a power transmission capacity analysis device that analyzes the power transmission capacity of the power system.
A group evaluation cross-section generation unit that generates a group evaluation cross-section for evaluating each of a plurality of groups set in the power system for each group, and a cross-section generation unit for group evaluation.
A stability evaluation unit that evaluates the stability of the power system in each group for each stability evaluation index based on the cross section for evaluation of each group and a plurality of predetermined stability evaluation indexes.
Based on each evaluation result of the stability evaluation unit, the target stability evaluation index determination unit that determines at least one stability evaluation index to be analyzed among the stability evaluation indexes for each group, and the target stability evaluation index determination unit.
Based on the judgment result of the target stability evaluation index judgment unit, the power transmission capacity analysis unit that calculates the power transmission capacity when the load increases in each group for each group, and the power transmission capacity analysis unit.
A power transmission capacity analyzer equipped with. The transmittable capacity analysis unit calculates the transmittable capacity for each group by distributing the increase in load to each group.
The power transmission possible capacity analysis device according to claim 1. The power transmission capacity analysis unit expresses the relationship between the load increase and the stability in each group in a three-dimensional graph.
The power transmission possible capacity analysis device according to any one of claims 1 and 2. The cross-section generation unit for group evaluation is
Based on the configuration and state of the power system, a reference cross section of the power system is generated.
By increasing the load in the group and selecting a predetermined generator corresponding to the increase in the load, a group evaluation cross section for the group is generated for each group.
The power transmission possible capacity analysis device according to claim 1. The group is set for each area of the power system.
The power transmission possible capacity analysis device according to claim 1. The group is set based on the characteristics of the consumer or the characteristics of the power generation device included in the power system.
The power transmission possible capacity analysis device according to claim 1. The group is set for each business operator participating in the power system.
The power transmission possible capacity analysis device according to claim 1. The group is set for each device constituting the power system.
The power transmission possible capacity analysis device according to claim 1. It is a power transmission capacity analysis method that calculates the power transmission capacity of the power system by a computer.
The calculator
A group evaluation cross section for evaluating each of the plurality of groups set in the power system is generated for each group.
Based on the cross section for evaluation of each group and a plurality of predetermined stability evaluation indexes, the stability of the power system in each group is evaluated for each stability evaluation.
Based on the evaluation results, the stability evaluation index to be analyzed among the stability evaluation indexes is determined for each group.
Based on the determination result, the power transmission capacity when the load increases in each group is calculated for each group.
Transmission capacity analysis method. A computer program that allows a computer to function as a power transmission capacity analysis device that analyzes the power transmission capacity of a power system.
A group evaluation cross-section generation unit that generates a group evaluation cross-section for evaluating each of a plurality of groups set in the power system for each group, and a cross-section generation unit for group evaluation.
A stability evaluation unit that evaluates the stability of the power system in each group for each stability evaluation based on the cross section for evaluation of each group and a plurality of predetermined stability evaluation indexes.
Based on each evaluation result of the stability evaluation unit, the target stability evaluation index determination unit that determines the stability evaluation index of the analysis target for each group among the stability evaluation indexes, and the target stability evaluation index determination unit.
Based on the judgment result of the target stability evaluation index judgment unit, the power transmission capacity analysis unit that calculates the power transmission capacity when the load increases in each group for each group, and the power transmission capacity analysis unit.
A computer program that realizes.

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