JP3671542B2 - Time series work plan management method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a working schedule management system which easily defines the range of influence while minimizing the range of influence by the change of the work schedule. SOLUTION: This system is provided with an algorithm for generating a model having a 'system' in which a facility group is generalized and an 'operation item' of time series in which the work schedule for changing the condition of the system, sequentially checking whether the condition of the 'system' can be executed in regard to the operation items after the part to be changed on the occasion of the change of the 'operation item' of the time series and identifying the entire part of the executable operation items as the range to be influenced by the change of the work schedule. Moreover, the 'system' and 'operation item' are expressed by the object-oriented expression.

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for managing a time-series work plan for a change in equipment or a change in operation state in a system in which equipment groups spread over a wide area such as a power system are organically coupled.
[0002]
[Prior art]
The distribution automation system has a function to maintain facility data in accordance with changes (including new installations) of distribution facilities. This function collectively manages the construction schedules for equipment changes scheduled at various locations in the power distribution equipment spread over a wide area.
[0003]
Construction schedules for equipment changes scheduled at different locations do not interfere with each other if they are planned at sufficiently distant locations, but are based on the construction of a close location or one construction. In the case of construction, execution of construction may be affected by the status of other construction.
[0004]
For example, a construction schedule may be delayed or canceled depending on circumstances such as the weather at the site, and accordingly, all constructions based on the construction are delayed or canceled.
[0005]
The facility data maintenance function reflects the circumstances and manages the construction schedule in time series. If the plan at a certain point in time series is changed, the construction plan planned after that may be affected.
[0006]
The same problem arises when managing a time-series work plan that is likely to change, not limited to facility data maintenance of a distribution automation system. For example, considering the impact of a secondary accident on the power interchange plan of a distribution automation system, there are situations in which a power interchange plan for a certain power outage accident becomes impossible due to the subsequent accident. It is.
[0007]
When managing a time-series work plan, it is generally complicated to specify the range of influence associated with a change in the work plan at a certain point in time-series. It is desirable to establish a method for comprehensively solving such problems related to management of time series work plans. In actual cases, the policy corresponding to the work plan change is often only specified in the specification at a fairly rough level.
[0008]
Example:
・ If one plan is canceled due to equipment data maintenance, all subsequent plans are invalidated.
[0009]
・ When a bank of distribution lines that accompanies a distribution line accident due to power interchange causes a secondary accident, the power interchange is performed as a single power failure. Cases where inconsistencies occur in the accident blackout interchange plan after the previous distribution line accident are not considered.
[0010]
[Problems to be solved by the invention]
The conventional management method has the following problems.
[0011]
-A general method for dealing with time series work plans is not clarified.
[0012]
・ Although it should be considered the influence of time series on the work plan, it is often vague because the problem is difficult to see on the surface.
[0013]
• If the impact on other work plans is not taken into account, a system failure will occur.
[0014]
・ There are many cases where ad hoc prescriptions are realized as a function in consideration of the influence, but the data structure tends to be unnecessarily complicated. In this case, when the functions are intertwined in a complicated manner, it causes a failure that the integrity of the data is broken.
[0015]
An object of the present invention is to provide a work plan management system that makes it easy to specify an influence range while minimizing an influence range for a change in a work plan.
[0016]
[Means for Solving the Problems]
The present invention is a method for managing equipment changes and operation state changes in a system in which equipment groups are organically combined in a time-series work plan,
The system models with a "system" that generalizes the equipment group and a time-series "operation item" that generalizes the work plan that changes the state of this system,
When changing the “operation item” in the time series, whether or not it can be sequentially executed with respect to the state of the “system” is confirmed in order for the operation items after the change part, and the entire operation items that cannot be executed are changed by changing the work plan. with an algorithm to identify as a range affected
The “system” is an object-oriented expression composed of an object group representing the initial state and an object group representing a difference in state change,
The “operation item” has a time series of operation items, and the operation items can be sequentially reflected in execution or reflected, and if the operation items cannot be sequentially executed, the operation items are listed. The object-oriented expression is composed of a management object and an operation item object in which a corresponding differential object of the “system” is reflected when an operation item is executed .
[0018]
DETAILED DESCRIPTION OF THE INVENTION
This embodiment models a time series of a work plan that changes a monitoring target and its state, and an algorithm that can specify a work plan that is affected when a work plan of a certain monitoring target is canceled In the following, the basic processing method will be described, and the facility data maintenance and power interchange plan of the distribution automation system will be described as application examples.
[0019]
(1) Consider a “system” in which the modeled monitoring target is generalized and an “operation item” (acting on the system to change the state of the system) in which the work plan for changing the state of the monitoring target is generalized.
[0020]
In FIG. 1, the puzzle is “system”, and the operation for creating the puzzle is “operation item”. The time series of the operation items is an operation sequence for the system, and the state of the system is changed. A puzzle that becomes a system is a system that changes in response to an operation with time while maintaining a certain rule, and the state of the system changes one after another when the operation of the operation item sequence is reflected in time series.
[0021]
FIG. 2 is an example of facility data maintenance of the distribution automation system, where “system” is a distribution system, and “operation item” is a work plan for newly installing or removing facilities of the distribution system. By repeating this, the power distribution system will be sequentially expanded or renovated.
[0022]
Each of these operation items may or may not be possible depending on the state of the system. In the example of equipment data maintenance, when an operation item for newly establishing a certain utility pole between certain systems is considered, the operation item cannot be executed unless it is a distribution system in which the utility pole exists.
[0023]
In the following description, it is assumed that it is confirmed whether each operation item can be executed for each state of the system.
[0024]
Now, when considering the time series of operation items for a certain system state, if the operation items can be executed in order from the beginning of the time series, the time series will be referred to as “sequentially executable time series” (FIG. 3). reference).
[0025]
When there is a time series that can be sequentially executed with respect to the state of the system, a further executable operation item is added to the end of the time series (a in FIG. 4), or the last operation item is deleted (in FIG. 4). b) The time series of operation items that can be performed is a time series that can be sequentially executed again.
[0026]
When trying to change the time series of operation items for a system, a time series that cannot be executed sequentially appears. For example, it is a case where an operation item is inserted in the middle of a time series or a case where an operation item in the middle of a time series is deleted (see FIG. 5).
[0027]
An operation item that becomes impossible for such a time series change is extracted as an influence range associated with the time series change.
[0028]
For example, as shown in FIG. 6, a system state that reflects execution up to operation items that are guaranteed to be executed sequentially is created, and operation items are sequentially assigned to portions that are not guaranteed to be executed sequentially. Run it. At that time, the operation item that cannot be executed is not executed, and the next operation item is executed. The procedure is repeated until the last operation item in the time series.
[0029]
At this time, the entire operation items that could not be executed are defined as the entire affected operation items. The operation items that are affected vary depending on the definition of whether execution is possible or not. For example, in equipment data maintenance, the situation differs depending on whether the system can be newly installed only when two telephone poles are newly installed, or can be newly installed without a telephone pole.
[0030]
Therefore, the meaning of being impossible due to influence depends on the definition of feasibility. This point is important and needs to be carefully considered in application.
[0031]
The basic idea for specifying the time-series influence range of the state change is summarized as follows.
[0032]
• Define the system and operation items that correspond to the monitoring target and the work plan that causes the change in state.
[0033]
-Defines whether the operation item can be executed or not for each state of the system.
[0034]
・ Set the initial state of the system and the time series of operation items that can be executed sequentially.
[0035]
・ Change a certain range of time series.
[0036]
-Check in order whether the operation items after the changed part of the time series can be executed.
[0037]
• All operation items that cannot be executed are affected.
[0038]
(2) Implementation Method A method for implementing the above concept in an object-oriented manner will be described. First, the following objects are prepared (see FIG. 7).
[0039]
(A) System: A group of objects to be monitored. It consists of the difference between the initial state of the system and the state change of the system. All the states of the system are represented by the initial state and the reflection state of the entire difference object.
[0040]
(B) System initial state: a group of objects representing the initial state of the system.
[0041]
(C) System state change difference: an object group representing a system state change difference. Corresponds to the operation item and represents its state change. It has a case where the state change is reflected and a case where the state change is not reflected. It is determined whether or not the state change can be reflected on the state of the system at that time. When reflection is possible, this indicates that the state of the system has changed due to the reflection state.
[0042]
(D) Management of operation items: Has a time series of operation items. Operation items can be reflected sequentially and reflected back. If it is impossible to execute sequentially, list the operation items that are impossible.
[0043]
(E) Operation item: item of work plan. Corresponds to the system state change difference object. When an operation item is executed, the corresponding difference object is reflected.
[0044]
The modeling concept shown in (1) is realized using the above objects.
[0045]
At this time, for the purpose of specifying the range of influence associated with the change in the time series of the work plan, when giving the time series of operation items to the initial state of the system, only those that can be executed in order are reflected. It is only necessary to pick up operation items that could not be executed.
[0046]
First, each object of “system state change”, “time series of operation items”, and “system state change difference” corresponding to “operation items” is prepared. Then, all difference objects are set to an unreflected state (representing the initial state of the system). Next, sequentially executable portions of the “time series of operation items” are sequentially executed (difference objects are reflected).
[0047]
From there, the operation items are further reflected in time series, and the next operation item is reflected without executing the items that cannot be executed (the difference object cannot be reflected). This is repeated until the end of the time series, and the operation items that have not been executed are listed. The basic idea is as follows.
[0048]
As shown in FIG. 8, the execution of the operation item is replaced with the reflection of the difference object of the system state change, and all state transitions are represented by the change of the reflection attribute of the difference object.
[0049]
When there is a change in the time series of the operation items, the influence range is specified by tracking possible state transitions of the difference object, starting from the corresponding difference object reflection state.
[0050]
(3) Application to equipment data maintenance (Embodiment 1)
Overview of facility data maintenance function • The distribution system managed by the distribution automation system has a large number of facilities, and facilities are constantly being expanded and modified. The distribution automation system has equipment data of each equipment, and performs various processes based on the equipment data. Therefore, it is necessary to modify the equipment data as the equipment is expanded and modified.
[0051]
・ Equipment data is meaningless unless it reflects real-time equipment in real time, so correction of equipment data is actually performed when the construction of the equipment is completed.
[0052]
・ Items that change (newly install, modify, or remove) power distribution equipment are called maintenance items, and a unit that bundles a series of maintenance items and handles them as one piece of construction is called a maintenance subject. The current power distribution system will be updated in the form of the main registration (construction completion) of the maintenance subject.
[0053]
・ Equipment construction has a construction schedule, and the construction of the equipment can be planned so that construction can be performed according to the construction schedule. At that time, since there is a construction that cannot be executed unless a certain construction is completed, the subject of each construction and therefore the equipment data maintenance has a dependency.
[0054]
・ Construction may not be carried out according to the schedule due to actual conditions such as the weather and poor conditions of workers. In addition, there may be cases where the edited construction subject is not executed due to circumstances or urgently required. Reflecting this situation, the maintenance function can edit a new subject and insert it in the middle, and can delete the subject in the middle.
[0055]
・ This insertion / deletion is a natural requirement, but it will affect the subject line with the aforementioned dependency. For this reason, the maintenance function needs to manage the maintenance subject in time series.
[0056]
Identifying a subject that is impossible due to insertion and deletion is important in many aspects. For example, a policy that only re-edits the affected subject line is much more efficient than a policy that re-edits all subsequent subject lines.
[0057]
In addition to insertion and deletion, there are also requests for processing such as changing the subject and splitting one subject into two, but these can be solved by a combination of deletion and insertion. When complex problems such as changes and divisions are involved, it is essential to accurately identify the subject line where inconsistencies occur.
[0058]
In the following, a mechanism for identifying the subject and items that are affected by insertion and deletion will be described.
[0059]
An object corresponding to the object prepared in the mounting method (2) is assigned (see FIG. 9).
[0060]
System: Distribution system (the entire distribution system including those to be newly installed in the future). One state of the system corresponds to one distribution system. Therefore, the entire state of the system is the entire distribution system.
[0061]
System initial state: Current state of the distribution system (represented by a distribution facility that is not planned to be newly established).
[0062]
Differences in system state changes ... Distribution facilities (representation of reflections such as new modifications and removal of facilities).
[0063]
Management of operation items: Maintenance system management.
[0064]
Operation item: Maintenance subject, maintenance item.
[0065]
The operation items include a maintenance subject and a maintenance item, and finally a link is provided from the maintenance item to the equipment.
[0066]
A system is represented as a set of all facilities, and both the initial state of the system and the difference object of the state change of the system are represented by facilities. When a facility functions as a system difference object, the facility is represented as a state until it is newly established or removed with the execution of maintenance items such as new establishment or removal.
[0067]
Therefore, equipment having a variable value representing a state of “does not exist” appears in a certain state of the system. As a difference object, the equipment has all the possible states due to the execution of maintenance items. The relationship between the distribution system represented by these and the time series of the subject is shown in FIG.
[0068]
If the object is configured in this way, the execution of the maintenance subject (maintenance item) is all expressed in the form of a change in the attribute of the equipment. Thus, the range of influence associated with deletion and insertion is specified as follows.
[0069]
Delete ... Do not execute the subject, and reflect only the executable subject after that. The subject that was not executable at this time is the affected area.
[0070]
In the example of FIG. 11, when subject 4 is deleted, subject 7 becomes impossible. This algorithm reflects up to subject 3 and skips subject 4 and reflects subject 5 and lower, does not reflect impossible subject 7, reflects only possible subject, and does not execute 7 is the affected subject.
[0071]
Insertion ... The execution subject is reflected up to the subject in the previous (past side) in time series from the time when the subject is inserted. Reflect the subject to be executed. Only items that can be executed in the subsequent subject lines will be reflected. The subject that was not executable at this time is the affected area.
[0072]
In the example of FIG. 12, when the subject 8 is inserted after the subject 3, the subject 4 becomes inexecutable and the subject 7 becomes inexecutable. This algorithm allows subject 8 to be reflected in the system state reflecting up to subject 3, reflects subject no more than subject 4 and disables it if it is impossible. Reflect only things.
[0073]
If execution reflection is grasped at the maintenance item level, it is possible to grasp the whole maintenance items that are affected by the insertion of deletion.
[0074]
(4) Application to power interchange plan (Embodiment 2)
Overview of power interchange function ・ When a distribution line accident occurs, the distribution automation system supplies power from the distribution line adjacent to the accident distribution line to the power outage section after identifying the accident section. This is called power interchange. Power interchange is performed by switching the distribution line by operating the switch.
[0075]
-Since there is a limit value for the power that can be supplied by the distribution line and the transformer to which it belongs, it is necessary to provide power interchange within a range that does not exceed the limit value of the distribution line as the supply source. For this reason, the distribution line which interchanges electric power with respect to one power failure distribution line becomes plurality.
[0076]
・ While the distribution line can be used to accommodate power, various policies can be taken depending on the situation of the distribution line and substation facilities, but the calculation for determining the accommodation plan is generally complicated and computationally intensive.
[0077]
・ Distribution lines that are in the power interchange state will return to the normal state through a switchback operation after the accident is removed. Before the restoration of a certain accident is completed, the next accident occurs (secondary accident), and the distribution line that is accomodating may be selected as the distribution line that accommodates power in the subsequent accident. In this case, a dependency relationship occurs between the accommodation states.
[0078]
-Since power interchange is not performed instantaneously, the dependency relationship of power interchange takes the form of a time series of the interchange plan.
[0079]
・ Furthermore, if a secondary accident occurs on a distribution line that is a source of power interchange, the planned power interchange plan cannot be executed. In this case, the accommodation plan having the dependency relationship as described above cannot be executed in a chain.
[0080]
Since it is inefficient in time to perform power interchange after waiting for the recovery of a subsequent accident, it is desirable to discard the infeasible interchange plan and newly calculate it. There is a need to identify an accommodation plan that becomes infeasible for this request.
[0081]
In the following, a mechanism for specifying an accommodation plan that becomes impossible due to an influence when one of the accommodation plans becomes infeasible when there are a plurality of accommodation plans will be described.
[0082]
The objects corresponding to the objects prepared by the mounting method (2) are as follows (see FIG. 13).
[0083]
System: Distribution system (standard system). One state of the system corresponds to one interchange state of the distribution system. Therefore, the entire state of the system is the entire interchanged state of the distribution system.
[0084]
Initial state of the system: Standard state of the distribution system (state that is not flexible).
[0085]
Difference in state change of system ... Flexible supply object. This means that the distribution line attached to the distribution system is interchanged with the distribution line.
[0086]
Management of operation items: secondary accident management objects.
[0087]
Operation item: Accident object.
[0088]
Operation items and their management objects: When an accident occurs in a distribution system facility, an accident object is created, and the subsequent accident recovery processing is performed independently. A secondary incident management object is placed to handle the secondary relationship between accidents. The subsequent accident management object determines whether there is no influence on the already created accommodation plan when an accident occurs, and if there is an influence, specifies an accommodation plan that cannot be chained. The previous concept is applied to this latter algorithm.
[0089]
System representation and difference object (accommodation supply object): The distribution system has normal facilities and distribution lines that are the collective concept. The distribution line has information on which distribution line is accommodated and from which distribution line is accommodated in the form of a collection of interchange supply objects.
[0090]
The flexible supply object can determine whether the flexibility can be reflected in a certain grid status, and whether the flexibility is reflected in the information of whether the flexibility is currently reflected and the planned grid status in the future. With information.
[0091]
Therefore, the reflection state is doubled and the attribute is properly used depending on the purpose. As actual distribution line accommodation progresses, the current accommodation state is made to reflect, and when creating a future accommodation plan, the calculation is performed with the state of the system reflecting the future accommodation state.
[0092]
Notes on time series of accommodation plans: When an accident occurs, the accident creates an accommodation plan for the system that reflects all the accommodation plans created so far. This is requested from the flexible calculation object. If an accommodation plan becomes impossible due to a subsequent accident, the accommodation plan will be discarded. At that time, the interchange plan that becomes impossible in the chain is also discarded.
[0093]
An accident in which the accommodation plan is discarded will ask the accommodation plan object again to have the accommodation plan, but at this time, the calculation of the accommodation plan will reflect all that has already been calculated (an accommodation plan that has not become impossible). Since the system status is calculated, the order in which accidents occur and the order in which accommodation plans are created do not match.
[0094]
The subsequent accident management object manages the accommodation plan as a time series of the creation order of the accommodation plan, and identifies the accommodation plan that is affected when one accommodation plan becomes impossible.
[0095]
A related image of these objects is shown in FIG. Accidents are requested from the accommodation plan object to create accommodation plans, and each accommodation plan is calculated on the basis of the accommodation plans created so far. In the secondary accident management, the time series of the calculation order of the accommodation plan is managed, and the influence on the accommodation plan at the time of the secondary accident is specified.
[0096]
As described above, the execution of the accommodation plan is expressed in the form of a change in the attribute of the accommodation object as in the case of the equipment data maintenance.
[0097]
In this way, when one accommodation plan becomes impossible, the method of specifying the influence range is as follows.
[0098]
As the state of reflection of the accommodation plan, the state of reflection of the future accommodation plan is used to create a system state that reflects the plan before the accommodation plan that has become impossible. Without reflecting it to the end. It is an accommodation plan that is affected by an accommodation plan that was impossible.
[0099]
In the example of FIG. 15, if the interchange plan 3 of the accident C becomes impossible due to the subsequent accident H, the system state reflected up to the interchange plan 2 does not reflect the one that cannot reflect the interchange plan 4 and later, but the last interchange It will be reflected to the plan. It is an accommodation plan that makes it impossible to reflect what could not be reflected.
[0100]
【The invention's effect】
As described above, the present invention has the following effects.
[0101]
(1) By modeling the system with “system” and “operation items”, it becomes easy to design an algorithm that identifies the range of influence on a change in time-series work plan.
[0102]
(2) By representing the “system” and “operation items” in an object-oriented manner, the management of the work plan must result in a design for determining the possibility of reflecting the difference object, and it is necessary to consider a complex time-series pattern. Absent.
[0103]
(3) Since it is applied to equipment data maintenance and the correction range accompanying the change of the construction subject can be minimized, re-editing waste is reduced.
[0104]
(4) Since an algorithm that may cause data inconsistency when applied to facility data maintenance is simply designed, the failure is reduced.
[0105]
(5) Since it can be applied to a power interchange plan and the range of influence at the time of the occurrence of a subsequent accident can be accurately identified, the number of power interchange calculations that often takes a long time is reduced. Along with this, power recovery is quicker.
[Brief description of the drawings]
FIG. 1 is a puzzle modeling for illustrating the present invention.
FIG. 2 is a modeling of facility data maintenance of a distribution system in an embodiment of the present invention.
FIG. 3 is a diagram illustrating the executability of operation items in time series according to the embodiment.
FIG. 4 is a diagram illustrating the principle of time-series management in an execution form.
FIG. 5 is a case where the possibility of sequential execution in the time series is lost in the embodiment.
FIG. 6 shows an example of an influence range associated with a time series change in the embodiment.
FIG. 7 is an original model of an object model in the embodiment.
FIG. 8 is a relationship diagram of a system, an operation item, and a difference object in the embodiment.
FIG. 9 is a distribution facility data maintenance object model in the embodiment.
FIG. 10 is a correspondence relationship between time series of subject lines and equipment objects in the embodiment.
FIG. 11 shows an example of equipment data maintenance subject deletion in the embodiment.
FIG. 12 shows an example of equipment data maintenance subject insertion in the embodiment.
FIG. 13 is a distribution line power interchange object model in the embodiment.
FIG. 14 shows a relationship between a time series of an accident accommodation plan and a distribution system in the embodiment.
FIG. 15 shows an example of an influence range of a change plan for a subsequent accident in the embodiment.

Claims (1)

It is a method for managing equipment changes and operational status changes in a system in which equipment groups are organically combined with a time-series work plan,
The system models with a "system" that generalizes the equipment group and a time-series "operation item" that generalizes the work plan that changes the state of this system,
When changing the “operation item” in the time series, whether or not it can be sequentially executed with respect to the state of the “system” is confirmed in order for the operation items after the change part, and the entire operation items that cannot be executed are changed by changing the work plan. with an algorithm to identify as a range affected
The “system” is an object-oriented expression composed of an object group representing the initial state and an object group representing a difference in state change,
The “operation item” has a time series of operation items, and the operation items can be sequentially reflected in execution or reflected, and if the operation items cannot be sequentially executed, the operation items are listed. A management method for a time-series work plan, characterized by an object-oriented representation comprising a management object and an operation item object in which a corresponding differential object of the "system" is reflected when an operation item is executed .

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