JP2006343974A - Risk evaluation system, risk evaluation method, its program, and its recording medium for power distribution facility - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a risk evaluation system or the like for a power distribution facility capable of obtaining the result of risk evaluation reflected to its maintenance plan without imposing loads upon a worker, with highly accuracy and at high speed in making the maintenance plan of the power distribution facility. <P>SOLUTION: The risk evaluation system for the power distribution facility which has employed an RBM method is provided with: a first storage means which is provided for each piece of equipment in the power distribution facility and stores information on each item related to the number of years of use, use history, or the like; a second storage means for storing information and the like on the item related to power supply failure caused by stop of power transmission and power distribution due to failure of the equipment; a first processing means for obtaining the level value of "the likelihood of failure" to be the first parameter of the RBM on the basis of the information in the first storage means; a second processing means for obtaining the level value of "magnitude of influences when the failure has occurred" to be the second parameter of the RBN for each piece of the equipment on the basis of the information in the second storage means; and a third processing means for obtaining risk of each piece of equipment on the basis of the two kinds of level values. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a risk evaluation system for a power distribution facility in a power system extending from a power transmission system to a power distribution system, a risk evaluation method, a program thereof, and a recording medium thereof, and is suitable for maintenance management of a substation facility in a substation, for example.

By planning the inspection, repair, replacement, etc. according to the result of risk assessment based on the deterioration status of each device in the facility and the future operation plan, maintenance according to the risk of each device becomes possible. Application of RBM has been attempted in that the cost required for maintenance management can be reduced while maintaining safety and reliability. RBM (Risk-Based Maintenance, including RBI (Risk-Based Inspection)) is a comprehensive analysis of various pieces of information related to equipment. The level of each parameter is evaluated for each device, and the risk of each device is calculated from these two types of level values using the risk matrix (or the result of multiplication of these two types of level values) This is a method of determining the risk of equipment) and preparing a maintenance plan for the equipment according to its size (Patent Document 1). Document 2) or some have been introduced (Non-patent Document 1).
JP 2002-123314 A JP 2004-46707 A “Corporate Information / IR> Pre-release 2002 Announcement on the drastic reduction of thermal power plant maintenance costs by introducing risk-based maintenance (RBM) method -Development of a new thermal power plant maintenance system", [online], 2002 January 28, Kansai Electric Power Co., Inc. [Search February 1, 2005], Internet <URL: http://www.kepco.co.jp/pressre/2002/0128-1j.html>

  On the other hand, in power transmission systems and power distribution systems for transmitting electricity generated at power plants to consumers, maintenance management using the RBM method is not particularly performed, and equipment provided by each equipment manufacturer At present, a rough maintenance plan is drawn up by adding experience to the accumulation of inspection records and malfunction records of equipment obtained through such information and periodic inspections.

  However, in recent years, with the main purpose of reducing personnel costs, unmanned substations and switching stations and centralized control by power stations have been promoted. Therefore, of course, we want to reduce the cost required for maintenance management, but from the viewpoint of reducing the burden on limited personnel by reducing the frequency of inspection, repair, replacement, etc. On the other hand, application of the RBM method is being studied.

  Therefore, the present invention has been made in view of the above circumstances, and when formulating a maintenance plan for power distribution facilities, without burdening the operator with the risk assessment results reflected in the maintenance plan, It is an object of the present invention to provide a risk evaluation system, a risk evaluation method, a program thereof, and a recording medium thereof for a power distribution facility that can be obtained quickly and with high accuracy.

  The risk evaluation system for power distribution equipment according to the present invention for solving the above-mentioned problems is a risk evaluation system for power distribution equipment that adopts the RBM method, and is for each device or each component in the power distribution equipment. First storage means that is provided and stores at least information on each item related to years of use, usage status, usage history, and aging, and power supply troubles associated with the stoppage of power transmission and distribution due to equipment or component failures By performing a predetermined calculation on the basis of the information stored in the first storage unit and the second storage unit that stores at least the item information, a level value of “probability of failure” that is one parameter of the RBM is obtained. By performing a predetermined calculation based on the information in the first processing means and the second storage means obtained for each device or each part, another RBM is obtained. The second processing means for obtaining the level value of “the magnitude of influence when a failure occurs”, which is a parameter of each device, and each device and each component based on these two kinds of level values And a third processing means for determining the risk of the above.

  The risk evaluation method for power distribution facilities according to the present invention is a risk evaluation method for power distribution facilities that adopts the RBM method, and is provided for each device or each component in the power distribution facility. Information is input from the first storage means that stores at least information on each item related to age, usage status, usage history, and aging, and also related to power supply problems associated with power transmission and distribution being stopped due to equipment or component failures. By inputting information from the second storage means for storing at least the item information and performing a predetermined calculation based on the information obtained from the first storage means, one parameter of the RBM, “occurrence of failure RBM is obtained by obtaining a level value of “ease” for each device or each component and performing a predetermined calculation based on information obtained from the second storage means. Another parameter, “the magnitude of the impact when a failure occurs”, is obtained for each device and each component, and then, for each device and each component based on these two types of level values. It is characterized by seeking risk.

  The feature of the present invention is that, when the RBM method is adopted, “the probability of failure” which is one of the two parameters in the RBM method, the years of use of each device and each component in the power distribution facility, and the state of use Incorporating items related to usage history and aging as level evaluation items, another parameter, “the magnitude of the effect when a failure occurs”, is associated with the stoppage of power transmission and distribution due to equipment or component failures. Items related to power supply problems are included as level evaluation items. Then, the worker evaluates the output risk and drafts a maintenance plan for the power distribution facility according to the magnitude (risk evaluation result). As described above, according to the present invention, the RBM method can be applied to the power distribution facility by selecting the level evaluation items that are indispensable in the power distribution facility and are unique to the power distribution facility.

  In this case, the third processing means may obtain the risk from the two kinds of level values using a risk matrix, or obtain the risk by multiplying the two kinds of level values. May be.

  The “year of use” refers to the number of years that have elapsed since the start of use of the device or component, and the information on the item of use year may be information on the number of years of use. Or it may be registered with information of the installation year of the part. In this case, the number of years used is the number of years calculated backward from the current time (at the time of risk assessment) to the year of installation.

  In addition, “use state” means, for example, a concept that is conceived by the installation location and environment of equipment and parts, the contamination classification of the installation location, the presence or absence of replacement parts (mainly whether production is discontinued), As information on the items related to the usage state, information on at least one of these items can be registered.

  “Usage history” refers to, for example, a concept that is conceived based on the presence or absence of repair results (part or unit), the number of troubles during operation, the number of temporary inspections, etc. The information of at least one of these items can be registered.

  “Deterioration degree” means, for example, a concept conceived based on the result of visual inspection, the result of a measurement test, etc., and information on at least one of these items is registered as item information on the degree of deterioration. Can be done.

  “Power supply failure” refers to a condition in which the customer cannot receive power during that time as a result of power transmission or distribution being stopped due to a failure of equipment or parts. For example, information on the supply-disturbing power amount can be registered as information on the item.

  Further, the present invention can employ a configuration in which the first processing means performs a predetermined calculation by weighting information on each item related to the years of use, usage states, usage history, and aging. That is, the years of use, usage status, usage history, and aging are not necessarily evaluated with the same specific gravity depending on the form of the power distribution facility. In such a case, information on each item is appropriately determined according to the specific gravity of each item. Is weighted. For example, if the age of use is higher than that of the usage state, multiply the information about the age of use by a factor higher than the coefficient multiplied by the item information on the usage status, and the level value of “probability of failure” Try to put out. As a result, a more accurate risk evaluation result can be obtained.

  In this case, each item related to the usage status, usage history, and age is divided into more detailed items taking into account the structure, characteristics, specifications, usage, etc. of the equipment and parts, and the information of each sub-item is weighted. Is more preferable. As a result, the reliability of the level value of “ease of failure” increases, and as a result, a more accurate risk evaluation result can be obtained.

  In addition, as described above, the item relating to the power supply failure may be a supply failure power amount, or the item relating to the power supply failure may be composed of supply failure power and time required for recovery. Good. “Supply-disturbing power” is called “supply-disturbing power” and “time required for recovery”, but the latter is used when both items are weighted.

  In the present invention, the first storage means is a first database that stores at least information on each item relating to the years of use, usage states, usage history, and aging, and is stored in the first database. A first input means for inputting the received information, and a configuration in which the information obtained from the first input means is provided to the first processing means can be employed. The means is a second database that stores at least information on items relating to the supply-disturbing electric energy, and further includes second input means for inputting information stored in the second database, A configuration in which information obtained from the input means is provided to the second processing means can be employed. According to such a configuration, information on these various items is updated (maintenance) on the database in order to obtain a more accurate risk evaluation result. In addition, this database makes it possible to share information on these various items with other systems, or to use a database including information on these various items constructed in other systems. There is.

  In this case, it is preferable that the second database is provided for each device or each component so as to be associated with the first database. Regardless of the type of equipment or parts, if any equipment or part fails, the power distribution equipment will always stop functioning as a whole. Is the same regardless of the type of equipment and parts, so there is only one second database. However, depending on the kind of equipment and parts, the “magnitude of impact when a failure occurs” for the entire power distribution facility In different cases (for example, when the degree of power supply failure when a certain device fails and the power supply failure when another device fails), for each device or each component By providing the second database, a more accurate risk evaluation result can be obtained.

  In this case, it is preferable that the second database is updated in accordance with the change in the configuration of the power system in all the jurisdictions. In the power business, the configuration of the power system is changed every year for various reasons, such as regional changes in the amount of power required, the addition of transmission systems and distribution systems, and the establishment of new substations. In other words, due to changes in conditions such as the degree of freedom of system change in the transmission system and distribution system, the presence or absence of alternative power distribution facilities, even in one power distribution facility, the `` the magnitude of the impact when a failure occurs over time '' Will change. Such a configuration corresponds to such a situation, and as a result of increasing the reliability of the level value of “the magnitude of influence when a failure occurs”, it is possible to obtain a more accurate risk evaluation result.

  Further, in the present invention, when the power distribution facility is a substation facility in a substation, each device and each component includes a transformer, a gas circuit breaker, a gas insulated switchgear, a vacuum circuit breaker, an oil-filled circuit breaker, and a disconnector. , Instrument transformers, lightning arresters, switch gears, power capacitors, shunt reactors, power cables, switchboards, rectifiers, storage batteries, and compressors. These are equipment or parts necessary for realizing the function of the substation equipment, and their maintenance management is extremely important.

  In these examples, there are equipment and parts. That is, the risk evaluation target may be equipment and parts, may be equipment alone, or may be parts alone. The expressions “equipment and parts”, “each equipment and each part”, and “each equipment and each part” used so far are intended for this purpose.

  As described above, according to the present invention, it is possible to obtain a quick and highly accurate risk evaluation result at any time by simply updating (maintenance) the contents registered in the first and second storage means. Therefore, it is possible to reduce the burden on the worker when preparing a maintenance plan for the power distribution facility. In addition, by adopting the RBM method, it is possible to optimize the timing of inspection, repair, replacement, etc. of the equipment, and in this respect as well, the burden on the worker can be reduced, and the cost required for maintenance management is also reduced. Can be reduced.

  Hereinafter, a risk evaluation system for substation equipment in a substation will be described as a risk evaluation system for power distribution equipment according to the present invention.

  The procedure for evaluating the risk of each device and each component (hereinafter referred to as “target object”) in the substation equipment is composed of the following three stages. The first stage is “database creation” for each target. In this stage, information on each item related to the years of use, usage status, usage history and aging of the target, and transmission and distribution of power due to the breakdown of the target Investigate and collect information on items related to power supply disruptions associated with the shutdown and create a database.

The second stage is “primary evaluation of an object”. In this stage, based on the information registered in the database, two parameters of RBM, “ease of failure” and “failure” Each of “the magnitude of the effect when it occurs” is evaluated for each object and converted into a level value (evaluation index).

  The third stage is “secondary evaluation of the object”, and the obtained two kinds of level values are put on the risk matrix regarding “ease of failure” and “the magnitude of the effect when a failure occurs”. After mapping, the risk of each object is obtained from this risk matrix, and the worker re-evaluates this from a comprehensive viewpoint including the relationship between each object and examples related to other objects. To obtain risk assessment results.

  As shown in FIG. 1, the risk evaluation system 1 for realizing them stores information of items related to two databases, that is, “probability of failure” which is the first parameter of the RBM. A first parameter database 2a, a second parameter database 2b in which information on items related to the "magnitude of influence when a failure occurs", which is a second parameter of the RBM, is stored; and a data input unit 3, a processing unit 4, an operation unit 5, and an output unit 6.

  The risk evaluation system 1 can be configured using a computer including a CPU, a memory, an input device, an output device, and an external storage device connected to each other by a bus. The memory includes, for example, a ROM (Read Only Memory), a RAM (Random Access Memory), and the like, and stores programs and data used for processing. The processing unit 4 is based on the cooperation of a program of a specific program code segment in a computer memory and a CPU that executes the program.

  The “first storage means” or “first database” according to the present invention corresponds to the first parameter database 2a, the memory, or the external storage device, and the “second storage means” according to the present invention or The “second database” corresponds to the second parameter database 2b, the memory, or the external storage device, and the “input means” according to the present invention corresponds to the input unit 3 or the input device. The “first to third processing means” correspond to the processing unit 4 or the CPU and program.

<First parameter database>
FIG. 2 is a table showing the data structure of the first parameter database 2a. The first parameter database 2a is provided for each object. Incidentally, the objects include transformers, gas circuit breakers, gas insulated switchgears, vacuum circuit breakers, oil-filled circuit breakers, disconnectors, instrument transformers, lightning arresters, switch gears, power capacitors, shunt reactors, power Since there are 16 items such as cables, switchboards, rectifiers, storage batteries, and compressors, 16 types of first parameter databases 2a exist.

  Here, each object will be briefly described. A transformer consists of a common magnetic circuit and a plurality of windings that are linked to it, and a static induction that transmits AC power received from one winding (primary) to the other winding (secondary) by electromagnetic induction. Says a vessel. The gas circuit breaker is used for the purpose of opening and closing an electric circuit by mechanical movement of a pair of contacts, and uses a gas as a blocking medium in the opening and closing unit. A gas-insulated switchgear can be installed compactly because it has an insulating medium such as a circuit breaker, disconnector, instrument transformer, lightning arrester, grounding switch, etc., and has a higher withstand voltage than air. ). A vacuum circuit breaker is used for the purpose of opening and closing an electric circuit by mechanical movement of a pair of contacts, and uses a vacuum as a blocking medium in the opening and closing unit.

  The oil-filled circuit breaker is used for the purpose of opening and closing the electrical circuit by the mechanical movement of a pair of contacts, and uses an insulating oil as a blocking medium in the opening and closing part. The disconnector is a high-voltage or extra-high-voltage circuit that is used simply to open and close a charged electric circuit and does not open or close a load current. An instrument transformer refers to a transformer that transforms high voltage, large current, etc. into voltage and current that are easy to measure. A lightning arrester is a device that protects equipment in a substation or the like against a surge abnormal voltage such as lightning. Switchgear is a switchgear made by combining a circuit breaker, fuse, measuring device, protection device, security device, connecting bus, etc., and is also called a closed switchboard. Capacitors for power are manufactured by stacking layers of insulating oil inserts between electrodes and encapsulating them in a container. Say what you do.

  The shunt reactor is a relatively large capacity reactor that is installed in parallel to the power transmission system and functions to supply a slow phase capacity. A power cable is a cable in which high-pressure insulating oil, synthetic rubber, or plastic is used instead of an air insulator, and the outer sheath is covered with lead coating, aluminum, synthetic rubber, polyethylene, or the like. The switchboard is the most effective form for monitoring, control, maintenance and security by attaching or accommodating one or more of measuring instruments, switches, relays, regulators, breakers, disconnectors, etc. to the structure. This is a collection of devices summarized in. A rectifier means what converts alternating current into direct current. A storage battery is a device that directly converts released energy into electricity in a chemical reaction or physical reaction of a substance, and means a battery that can be regenerated by reversible reaction and applying energy from the outside. A compressor means what produces | generates the high pressure air for operating a circuit breaker or a disconnector.

  Each database 2a has “year of use”, “use state”, “use history”, and “degree of aging” as high-level evaluation items. These items are items common to all objects. The “use state” is divided into medium-level evaluation items such as “installation location”, “installation site environment”, “installation location contamination classification”, and “presence / absence of replacement parts”. “Usage history” is divided into medium-level evaluation items such as “presence / absence of repair results”, “number of troubles during operation”, and “number of temporary inspections”. “Deterioration degree” is divided into medium-level evaluation items such as “result of visual inspection” and “result of measurement test”, and each is further divided into small-level evaluation items for each component of the object. Note that the contents of the medium level evaluation item and the small level evaluation item may differ for each object depending on the structure, characteristics, specifications, usage, and the like of the object. FIG. 2A shows a database of lightning arresters as an example of equipment, and FIG. 2B shows a database of power cables as an example of parts.

<Second parameter database>
FIG. 3 is a table showing the data structure of the second parameter database 2b. The second parameter database 2b is also provided for each object, and there are 16 types of second parameter databases 2b, similar to the first parameter database 2a.

  Each database 2b has “supply trouble power”, “time required for recovery”, and “repair handling” as large-level evaluation items. “Supply-disturbing power” and “time required for recovery” are parameters as supply-disturbing power, and are an indicator of “the magnitude of the impact when a failure occurs” from an external perspective, "Is an indicator of" the magnitude of the effect when a failure occurs "from an internal perspective. These items are items common to all objects. The “time required for recovery” is divided into medium-level evaluation items such as “operation recovery time”, “emergency recovery time”, and “regular recovery time”. “Repair support” is divided into medium-level evaluation items such as “repair cost”, “parts procurement”, and “engineer response”. FIGS. 3A and 3B show databases of lightning arresters and power cables, respectively, similarly to FIGS. 2A and 2B.

<First parameter table>
4 and 5 are first parameter tables for obtaining a level value of “probability of failure” that is the first parameter of the RBM based on the information stored in the first parameter database 2a. FIG. 4 shows a table of lightning arresters, and FIG. 5 shows a table of power cables. The large to small level evaluation items are classified according to the level, and are used for determining the level to which each information in the first parameter database 2a belongs. The classification is set so that the level value increases as the degree increases.

<Second parameter table>
FIG. 6 shows the second parameter for obtaining the level value of “the magnitude of the influence when a failure occurs”, which is the second parameter of the RBM, based on the information stored in the second parameter database 2b. FIG. 6 (a) shows a table of lightning arresters, and FIG. 6 (b) shows a table of power cables with the same contents as the table of lightning arresters. The large to medium level evaluation items are classified according to the level, and are used for determining the level to which each information in the second parameter database 2b belongs. The classification is set so that the level value increases as the degree increases.

  With the above, the description of the configuration of the risk evaluation system according to the present embodiment has been completed, and then the risk evaluation procedure, more specifically, the first stage has been completed, and the second stage and the third stage have been completed. explain.

<Second stage flow>
In the second stage, two steps are performed. The first step is a step of obtaining a level value of the “probability of failure” that is the first parameter of the RBM, and the next step is “the magnitude of the influence when a failure occurs” that is the second parameter of the RBM. This is a step for obtaining the level value of “sa”.

  In the first step (corresponding to the “first process” according to the present invention), a predetermined calculation is performed based on information stored in the first parameter database 2a, thereby “ease of failure”. Find the level value. 7 and 8 are diagrams showing the contents of the calculation. First, based on the information shown in FIGS. 2A and 2B, it is assigned to which level value the information of each item belongs, and the level value for each small level evaluation item is grasped.

  A weighting coefficient is set for each small level evaluation item (the left column in the figure), so that the large level evaluation is performed by multiplying the level value of the grasped small level evaluation item unit and the weighting coefficient. Calculate the total value for each item. Furthermore, a weighting coefficient is set for each large level evaluation item (the right column in the figure), and the final value is obtained by multiplying the calculated total value for each large level evaluation item by the weighting coefficient. A comprehensive value is obtained, and this (inside the thick frame in the figure) is set as a level value of “probability of failure” which is the first parameter of the RBM. Then, this step is repeated for each object, and the level value of “ease of failure” for each object is obtained.

  Next, in the second step (corresponding to “second processing” according to the present invention), a predetermined operation is performed based on the information stored in the second parameter database 2b, thereby “failure occurs”. The level value of “the magnitude of the effect of the case” is obtained. FIG. 9 is a diagram showing the calculation contents. First, based on the information shown in FIGS. 3A and 3B, it is assigned to which level value the information of each item belongs, and the level value for each intermediate level evaluation item is grasped.

  A weighting coefficient is set for each medium level evaluation item (the left column in the figure), so that the large level evaluation is performed by multiplying the level value of each grasped medium level evaluation item by the weighting coefficient. Calculate the total value for each item. Furthermore, a weighting coefficient is set for each large level evaluation item (the right column in the figure), and the final value is obtained by multiplying the calculated total value for each large level evaluation item by the weighting coefficient. The total value is calculated, and this (inside the thick frame in the figure) is set as the level value of the second parameter of the RBM, “the magnitude of influence when a failure occurs”. Then, this step is repeated for each object, and a level value of “the magnitude of influence when a failure occurs” is obtained for each object. However, if all the objects share one second parameter table, the process only needs to be performed once.

<3rd stage flow>
This completes the second stage and then proceeds to the third stage. In the third stage, two kinds of level values for each object obtained in the second stage are mapped on the risk matrix. FIG. 10 shows the output result. In the figure, the area with the lightest color corresponds to “ex-post maintenance”, the next area corresponds to “repair”, and the darkest area corresponds to “update (replacement)”. The worker re-evaluates this from a comprehensive point of view including the relevance of each object and examples related to other objects, and finally obtains the result of risk evaluation. Further, priorities of objects corresponding to the repair evaluation part and the update (exchange) evaluation part are given and reflected in the maintenance plan.

  As described above, according to the risk evaluation system according to the present embodiment, the information registered in the first parameter database 2a and the second parameter database 2b can be updated (maintenance) with new information at any time. Since the result of quick and highly accurate risk evaluation can be obtained, it is possible to reduce the burden on the operator when preparing a maintenance plan for the power distribution facility. In addition, by adopting the RBM method, it is possible to optimize the timing of inspection, repair, replacement, etc. of the equipment, and in this respect as well, the burden on the worker can be reduced, and the cost required for maintenance management is also reduced. Can be reduced.

  In addition, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the summary of this invention.

  For example, in the above embodiment, the first parameter database 2a and the second parameter database 2b are divided and information is managed separately. However, the present invention is not limited to this, and one database is used. It may be.

The block diagram of the risk evaluation system which concerns on this embodiment is shown. The data structure of the first parameter database used in the risk assessment system according to the embodiment, wherein (a) is related to a lightning arrester that is one of the substation facilities, and (b) is one of the substation facilities. Shown for a power cable. It is a data structure of the database for 2nd parameters used in the risk evaluation system which concerns on the embodiment, (A) is related with a lightning arrester, (B) shows the thing regarding a power cable. It is the 1st parameter table used in the risk evaluation system concerning the embodiment, Comprising: The thing regarding a lightning arrester is shown. It is the 1st parameter table used in the risk evaluation system which concerns on the same embodiment, Comprising: The thing regarding an electric power cable is shown. It is the 2nd parameter table used in the risk evaluation system which concerns on the embodiment, (A) is related with a lightning arrester, (B) shows the thing regarding a power cable. It is explanatory drawing which represented the level evaluation process of "ease of failure" by the risk evaluation system which concerns on the same embodiment, Comprising: The thing regarding a lightning arrester is shown. It is explanatory drawing which represented the level evaluation process of "ease of failure" by the risk evaluation system which concerns on the same embodiment, Comprising: The thing regarding an electric power cable is shown. It is explanatory drawing which represented the level evaluation process of "the magnitude of the influence when a failure occurs" by the risk evaluation system concerning the same embodiment, and (a) is related to a lightning arrester, and (b) is electric power. Indicates a cable related item. The risk matrix output by the risk evaluation system which concerns on the embodiment is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Risk evaluation system 2 Database 2a 1st parameter database 2b 2nd parameter database 3 Input part 4 Processing part 5 Operation part 6 Output part

Claims (16)

A risk assessment system for power distribution facilities that adopts RBM (Risk-Based Maintenance) method,
A first storage means that is provided for each device or each component in the power distribution facility and stores at least information of each item relating to the years of use, the use state, the use history, and the degree of aging,
A second storage means for storing at least information on items relating to a power supply failure caused by power transmission or distribution being stopped due to a failure of a device or a component;
First processing means for obtaining a level value of “probability of failure”, which is one parameter of the RBM, for each device or each component by performing a predetermined calculation based on information in the first storage means When,
By performing a predetermined calculation based on the information in the second storage means, the level value of “the magnitude of influence when a failure occurs”, which is another parameter of the RBM, is set for each device or each component. Second processing means to be obtained;
A risk evaluation system for power distribution equipment, comprising: a third processing means for determining a risk of each device and each component based on these two kinds of level values.   The risk evaluation system for power distribution equipment according to claim 1, wherein the third processing means obtains a risk from the two types of level values using a risk matrix.   The risk evaluation system for power distribution equipment according to claim 1, wherein the third processing means obtains a risk by multiplying the two kinds of level values.   The said 1st processing means weights the information of each item regarding the said years of use, a use state, a use history, and an aging degree, and performs predetermined calculation, The any one of Claim 1 thru | or 3 characterized by the above-mentioned. Risk assessment system for power distribution equipment described in 1.   Each item relating to the use state, use history and age is divided into finer items taking into account the structure, characteristics, specifications, usage, etc. of the equipment and parts, and weights the information of each sub-item. The risk evaluation system for power distribution equipment according to claim 4.   The risk evaluation system for a power distribution facility according to any one of claims 1 to 5, wherein the item relating to the power supply trouble is a supply trouble power amount.   The risk evaluation system for a power distribution facility according to any one of claims 1 to 5, wherein the item related to the power supply trouble includes a supply trouble power and a time required for recovery.   The risk evaluation for the power distribution facility according to claim 7, wherein the second processing means performs a predetermined calculation by weighting the information on the supply trouble power and the information on the time required for recovery. system.   The first storage means is a first database that stores at least information on each item relating to the years of use, usage state, usage history, and age, and inputs information stored in the first database. The power distribution facility according to any one of claims 1 to 8, further comprising a first input unit, wherein the information obtained from the first input unit is provided to the first processing unit. Risk assessment system for use.   The second storage means is a second database that stores at least information on items relating to the power supply failure, and further includes second input means for inputting information stored in the second database, 10. The risk evaluation system for power distribution equipment according to claim 9, wherein information obtained from the second input means is provided to the second processing means.   11. The risk evaluation system for power distribution equipment according to claim 10, wherein the second database is provided for each device or each component so as to be associated with the first database.   The risk evaluation system for a power distribution facility according to claim 11, wherein the second database is updated in accordance with a change in configuration of a power system in all jurisdictions.   The power distribution facility is a substation facility in a substation, and each device and each component includes a transformer, a gas circuit breaker, a gas insulated switchgear, a vacuum circuit breaker, an oil-filled circuit breaker, a disconnector, a meter transformer, The power distribution facility according to any one of claims 1 to 12, wherein the power distribution facility is at least one of a lightning arrester, a switchgear, a power capacitor, a shunt reactor, a power cable, a switchboard, a rectifier, a storage battery, and a compressor. Risk assessment system for use. A risk assessment method for power distribution facilities that adopts the RBM method,
While inputting information from the first storage means which is provided for each device or each part in the power distribution facility and stores at least information on each item relating to the years of use, usage state, usage history and aging,
Input information from the second storage means for storing at least information on items relating to power supply troubles associated with the stoppage of power transmission or distribution due to equipment or component failures,
By performing a predetermined calculation based on the information obtained from the first storage means, a level value of “probability of failure”, which is one parameter of the RBM, is obtained for each device or each component,
By performing a predetermined calculation based on the information obtained from the second storage means, the level value of “the magnitude of influence when a failure occurs”, which is another parameter of the RBM, is set for each device or each For each part,
After that, a risk evaluation method for power distribution facilities, characterized in that the risk of each device and each component is obtained based on these two kinds of level values.   A program for causing a computer to execute the risk evaluation method for power distribution equipment according to claim 14.   The computer-readable recording medium which recorded the program of Claim 15.

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