CN113673725A - A method and system for formulating a differentiated maintenance strategy for distribution network equipment - Google Patents
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Abstract
本发明公开了一种配电网设备差异化检修策略制定方法及系统，涉及电力设备维护技术领域。本发明通过对部件名称、风险因素和风险原因进行记录，分析配电网设备的故障概率，同时结合设备故障损失的电力损失成本和物料损失成本，对风险进行定级，最终根据所述风险等级信息和关键约束条件，对配电网设备制定对应的检修策略。本发明能够根据不同的风险等级信息和关键约束条件，制定对应的检修策略，避免因过度检修造成居民正常用电受到影响的问题。
The invention discloses a method and a system for formulating a differentiated maintenance strategy for power distribution network equipment, and relates to the technical field of power equipment maintenance. The invention analyzes the failure probability of distribution network equipment by recording component names, risk factors and risk reasons, and at the same time combines the power loss cost and material loss cost of equipment failure to classify risks, and finally according to the risk level Information and key constraints, and formulate corresponding maintenance strategies for distribution network equipment. The present invention can formulate corresponding maintenance strategies according to different risk level information and key constraints, so as to avoid the problem that residents' normal electricity consumption is affected due to excessive maintenance.
Description
Technical Field
The invention relates to the technical field of power equipment maintenance, in particular to a method and a system for making a differentiated maintenance strategy of power distribution network equipment.
Background
With the continuous construction of various informatization systems, various data of equipment are continuously improved, wherein the data comprise basic information, defect data, overhaul data, test data, equipment running state data, electricity consumption metering data and the like, equipment defect data, overhaul data, test data and the like, documents are filled, approved and filed through a business system, and the data are generally stored in a transactional database. The device operational data and electricity usage metering data are typically stored in unstructured databases or files. The data are dispersed in each business system, and data support is provided for equipment operation and maintenance in each business analysis scene.
The traditional maintenance is realized in a mode of regular maintenance, wherein the regular maintenance refers to preventive maintenance based on time, and maintenance grades, maintenance periods, maintenance items and the like are determined in advance according to the rules of the life cycle of equipment. Excessive maintenance can exist in the mode, the power failure times are increased, the power failure time is prolonged, and the electricity consumption of residents is influenced.
Disclosure of Invention
The invention aims to provide a method and a system for making a differentiated maintenance strategy of power distribution network equipment so as to avoid the problem that normal electricity utilization of residents is influenced due to excessive maintenance.
In order to achieve the purpose, the invention provides a power distribution network equipment differentiated maintenance strategy making method, which comprises the following steps:
acquiring an equipment risk mapping table; the equipment risk mapping table comprises component names, risk factors and risk reasons of the power distribution network equipment;
obtaining the fault probability of the power distribution network equipment according to the equipment risk mapping table;
obtaining a risk result corresponding to each type of equipment fault according to the power loss cost and the material loss cost of each type of equipment fault;
according to the fault probability and the risk consequence corresponding to each type of equipment fault, carrying out risk grading on each type of equipment fault to obtain risk grade information of the power distribution network equipment;
and generating a maintenance strategy corresponding to the power distribution network equipment according to the risk level information and the key constraint conditions.
Preferably, the obtaining of the risk consequence corresponding to each type of equipment fault according to the power loss cost and the material loss cost lost by each type of equipment fault includes:
obtaining material loss cost according to equipment purchase cost, equipment maintenance cost and equipment state coefficient;
obtaining power loss cost according to load loss, electricity selling price and electricity purchasing price caused in the time period when the equipment cannot operate;
and obtaining the risk consequence corresponding to each type of equipment fault according to the material loss cost and the power loss cost.
Preferably, before the obtaining the device risk mapping table, the method further includes:
and acquiring the part names, risk factors and risk reasons of all power distribution network equipment needing to be maintained.
Preferably, obtaining the fault probability of the power distribution network device according to the device risk mapping table includes:
establishing a grading model according to the equipment risk mapping table to obtain grading information of states of all components of the power distribution network equipment;
and calculating the state grading information of the power distribution network equipment according to the grading information of the states of all the components of the power distribution network equipment to obtain the fault probability of the power distribution network equipment.
The invention also provides a power distribution network equipment differentiated maintenance strategy making system, which comprises:
the risk identification module is used for acquiring an equipment risk mapping table; the equipment risk mapping table comprises component names, risk factors and risk reasons of the power distribution network equipment;
the risk measurement and calculation module is used for obtaining the fault probability of the power distribution network equipment according to the equipment risk mapping table; the risk measurement and calculation module is further used for obtaining a risk result corresponding to each type of equipment fault according to the power loss cost and the material loss cost of each type of equipment fault;
the risk grading module is used for carrying out risk grading on various equipment faults according to the fault probability and the risk consequence corresponding to each equipment fault to obtain risk grade information of the power distribution network equipment;
and the strategy making module is used for generating a maintenance strategy corresponding to the power distribution network equipment according to the risk level information and the key constraint conditions.
Preferably, the risk measurement and calculation module is further configured to obtain a material loss cost according to the equipment acquisition cost, the equipment maintenance cost and the equipment state coefficient; the risk measurement and calculation module is also used for obtaining the power loss cost according to the load loss, the electricity selling price and the electricity purchasing price caused in the time period when the equipment cannot operate; and the risk measurement and calculation module is also used for obtaining the risk consequence corresponding to the fault of each type of equipment according to the material loss cost and the power loss cost.
Preferably, the risk identification module is further configured to obtain component names, risk factors and risk reasons of all power distribution network devices that need to be maintained.
Preferably, the risk measurement and calculation module is further configured to construct a scoring model according to the equipment risk mapping table, so as to obtain scoring information of states of each component of the power distribution network equipment; the risk measurement and calculation module is further used for calculating state grading information of the power distribution network equipment according to the grading information of the states of all the components of the power distribution network equipment to obtain the fault probability of the power distribution network equipment.
The invention also provides a computer terminal device comprising one or more processors and a memory. A memory coupled to the processor for storing one or more programs; when the one or more programs are executed by the one or more processors, the one or more processors implement the method for making the differentiated overhaul strategy of the power distribution network equipment according to any embodiment.
The invention further provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the method for making the differentiated overhaul strategy of the power distribution network equipment according to any one of the embodiments is implemented.
Compared with the prior art, the invention has the following beneficial effects:
the invention discloses a power distribution network equipment differentiated maintenance strategy making method, which comprises the steps of obtaining an equipment risk mapping table; the equipment risk mapping table comprises component names, risk factors and risk reasons of the power distribution network equipment; obtaining the fault probability of the power distribution network equipment according to the equipment risk mapping table; obtaining a risk result corresponding to each type of equipment fault according to the power loss cost and the material loss cost of each type of equipment fault; according to the fault probability and the risk consequence corresponding to each type of equipment fault, carrying out risk grading on each type of equipment fault to obtain risk grade information of the power distribution network equipment; and generating a maintenance strategy corresponding to the power distribution network equipment according to the risk level information and the key constraint conditions. According to the method, the component names, risk factors and risk reasons are recorded, the fault probability of the power distribution network equipment is analyzed, meanwhile, the power loss cost and the material loss cost of equipment fault loss are combined, the risks are graded, and finally, a corresponding maintenance strategy is formulated for the power distribution network equipment according to the risk grade information and the key constraint conditions. According to the invention, a corresponding maintenance strategy can be formulated according to different risk grade information and key constraint conditions, so that the problem that the normal electricity consumption of residents is influenced due to excessive maintenance is avoided.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic flow chart of a method for making a differentiated maintenance strategy of power distribution network equipment according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a power distribution network equipment differentiation maintenance strategy making system according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a computer terminal device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be understood that the step numbers used herein are for convenience of description only and are not used as limitations on the order in which the steps are performed.
It is to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
The terms "comprises" and "comprising" indicate the presence of the described features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
The term "and/or" refers to and includes any and all possible combinations of one or more of the associated listed items.
Referring to fig. 1, fig. 1 is a schematic flow chart of a power distribution network equipment differentiation maintenance strategy making method according to an embodiment of the present invention. In this embodiment, the method for making the differentiated maintenance strategy of the power distribution network equipment includes the following steps:
s110, acquiring an equipment risk mapping table; the equipment risk mapping table comprises component names, risk factors and risk reasons of the power distribution network equipment.
In the present embodiment, the probability or frequency of occurrence of different device failures may not be the same in consideration of them. And a corresponding maintenance strategy is formulated for knowing the risk condition of each fault reason. Knowing the risk situation of each failure cause requires analyzing in advance the risk source, the influence range, the event and the cause thereof which may have a significant influence on the target equipment. For example, the entire plant may be divided into components based on an effect analysis method, thereby decomposing plant anomalies and malfunctions. As an example, table 1 is an equipment risk mapping table for a certain distribution network equipment.
Table 1 equipment risk mapping table for certain distribution network equipment
And S120, obtaining the fault probability of the power distribution network equipment according to the equipment risk mapping table.
And S130, obtaining a risk result corresponding to each type of equipment fault according to the power loss cost and the material loss cost of each type of equipment fault.
In one embodiment, step S130, obtaining the risk consequence corresponding to each type of equipment fault according to the power loss cost and the material loss cost of each type of equipment fault, includes:
obtaining material loss cost according to equipment purchase cost, equipment maintenance cost and equipment state coefficient; obtaining power loss cost according to load loss, electricity selling price and electricity purchasing price caused in the time period when the equipment cannot operate; and obtaining the risk consequence corresponding to each type of equipment fault according to the material loss cost and the power loss cost.
The general risk consequences are mainly determined by the loss degree of the equipment loss, the power grid loss, the personal safety loss and the social loss, wherein the equipment loss comprises the replacement and maintenance cost of the equipment, and the power grid loss only considers the power loss and the electric quantity of the power grid in the case of power failure; personal safety and social loss factors are not considered for the moment. In this embodiment, the risk consequences include labor, materials, shift costs for equipment troubleshooting and replacement, and equipment failure lost load, failure duration, average electricity selling price.
And S140, carrying out risk grading on various equipment faults according to the fault probability and the risk consequence corresponding to each equipment fault to obtain the risk grade information of the power distribution network equipment.
In one embodiment, in the process of grading risks, the importance of the device needs to be considered, and the importance of the device mainly considers three factors of voltage level, user level and device position. The voltage classes include 110kV class, 220kV class and 500kV and above. The user grade comprises a first-level user, a second-level user and a third-level user, wherein the first-level user needs to preserve power and needs three paths of power supply, for example: national party administration office, military special institution, international major conference site, special medical institution, etc.; the secondary users need two-way power supply, such as: high-rise office, residence, public place; the three-level user supplies power for a single path. According to the position of the equipment, the event consequences possibly caused by the equipment fault are judged and divided into general and above electric power safety accidents, first-level electric power safety events, second-level and third-level electric power safety events and fourth-level and fifth-level electric power safety events.
And S150, generating a maintenance strategy corresponding to the power distribution network equipment according to the risk level information and the key constraint conditions.
In one embodiment, the key constraints include resource constraints, grid operating constraints, equipment defect constraints, regulatory constraints, and technical constraints. The resource constraint comprises the influence on the operation and maintenance strategy due to the limitation of manpower, material resources and financial resources; the power grid operation constraint comprises the fact that the formulation of equipment operation and maintenance strategies is influenced by the power grid operation condition and operation mode, such as peak load, extreme climate and operation mode in holidays; the equipment defect constraint comprises the fact that the formulation of an operation and maintenance strategy is influenced due to the defects of the equipment or familial problems of the equipment, such as replacement of specified parts of a manufacturer, familial defects, multiple critical defects in one year and the like; the supervision constraint comprises the establishment of operation and maintenance strategies influenced by supervision, such as reliability constraint and anti-accident constraint; institutional constraints include the impact on the operation and maintenance strategy due to regulatory and environmental code requirements; the technical constraint comprises the step of influencing the formulation of operation and maintenance strategies, such as technical limitation and the like, in order to remove the limitation of technical parameters or match the development of new technologies.
In this embodiment of the present invention, before obtaining the device risk mapping table, the method further includes: and acquiring the part names, risk factors and risk reasons of all power distribution network equipment needing to be maintained.
In this embodiment of the present invention, obtaining the failure probability of the power distribution network device according to the device risk mapping table includes: establishing a grading model according to the equipment risk mapping table to obtain grading information of states of all components of the power distribution network equipment; and calculating the state grading information of the power distribution network equipment according to the grading information of the states of all the components of the power distribution network equipment to obtain the fault probability of the power distribution network equipment.
In the embodiment of the present invention, the risk level information includes a severity status, an abnormal status, an attention status, and a normal status.
For example: in a power distribution network, the state of medium voltage line equipment includes:
severe state: equipment with major, urgent defects or major safety hazards.
Abnormal state: (1) 10kV public feeder lines tripping for more than 5 times in the last 5 years; (2) connecting to 40 or more 10kV public feeders of the distribution transformer; (3) 10kV public feeder equipment with the operation life of more than 20 years. (4) Distribution transformer overloaded 10kV public feeder equipment.
Note the state: (1) 10kV public feeder lines tripping 3-5 times in the last 5 years; (2) 10kV public feeders with distribution transformers more than or equal to 30 and less than 40 are accessed; (3) 10kV public feeder lines which have 2 or more faults in the last year due to external damage, lightning stroke, windage yaw, tree obstacles, cable middle heads and terminal heads; (4) 10kV public feeder lines which run for 10-20 years; (5) a public overhead feeder line which runs in a heavy-pollution and high-humidity environment; (6) a 10kV utility feeder apparatus for distribution transformer heavy load or anticipated heavy load.
In the power distribution network, the states of the low-voltage transformer area equipment comprise:
and (3) normal state: (1) a 10kV public distribution transformer area without defects; (2) in the last 3 years, the low-voltage frequent tripping is less than 2 times in a 10kV public distribution transformer area; (3) a 10kV public distribution transformer area with a three-phase unbalance rate of less than 50%; (4) a 10kV public distribution transformer area with normal distribution transformer load; (5) and a non-high-consumption public distribution transformer area.
Note the state: (1) 10kV public distribution transformer area which is frequently tripped for 2-5 times in low voltage in the last 3 years; (2) a 10kV public distribution transformer area with a three-phase unbalance rate of 50-100%; (3) a 10kV public distribution transformer area with heavy load or anticipated heavy load of the distribution transformer; (4) a 10kV public transformer area which runs for 10-20 years; (5) and the system is in a public area which runs in a heavy-dirt and high-humidity environment.
Abnormal state: (1) 10kV public distribution transformer area unit equipment frequently tripping for more than 5 times at low voltage in the last 3 years; (2) a 10kV public distribution transformer area with a three-phase unbalance rate of more than 100%; (3) a 10kV public distribution transformer area with distribution transformer overload; (4) a high-loss 10kV public distribution transformer area; (5) and 10kV public platform district unit equipment with the operation life of more than 20 years.
Severe state: and the 10kV public distribution transformer area has important and emergency defects or important potential safety hazards.
In the embodiment of the invention, the maintenance strategy comprises power-off maintenance and non-power-off maintenance. According to the content of the working property and the working related range, the maintenance work is divided into four types: class A overhaul, class B overhaul, class C overhaul and class D overhaul. Wherein A, B, C type is power failure maintenance, and D type is non-power failure maintenance.
The type a overhaul refers to the overall disassembly inspection, maintenance, replacement and test of the equipment.
The type B overhaul refers to local overhaul of equipment, disassembly inspection, maintenance, replacement and test of parts.
The type C overhaul is a conventional overhaul and test, such as cleaning, appearance inspection, insulation performance detection, capacitance detection, insulator cleaning and the like, and the type C is a power failure overhaul.
The type D overhaul refers to uninterrupted overhaul such as live test, infrared thermal image, noise detection, uninterrupted part replacement and the like which are carried out in an uninterrupted state.
The equipment evaluated as "normal status" performs the class C service. Depending on the actual condition of the equipment, class C overhauls may be performed on a regular periodic basis or extended as appropriate. Before the class C overhaul, the class D overhaul can be properly arranged according to actual needs. If the equipment evaluated as the attention state can be recovered to the normal state by using the D-type maintenance, the D-type maintenance can be scheduled in due time, otherwise, the C-type maintenance is executed. If the evaluation result is the attention state due to the deduction of the single state quantity, the C-type overhaul is arranged in advance according to the actual situation. If the evaluation result is the attention state only caused by the total deduction or the total evaluation of all the state quantities of the equipment units, the evaluation can be executed according to the normal period, and necessary overhaul or test contents are added according to the actual condition of the equipment. Before the C-type maintenance, the D-type maintenance can be properly strengthened according to actual needs. The equipment evaluated as "abnormal state" should be scheduled for class C service in advance and for class B service as appropriate according to the actual situation. D-type maintenance is enhanced before power failure maintenance is implemented. The equipment evaluated as "serious condition" and the class B or class A overhaul is arranged as soon as possible, and the class D overhaul should be enhanced before the blackout overhaul is carried out.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a power distribution network equipment differentiation maintenance strategy making system according to an embodiment of the present invention. In this embodiment, power distribution network equipment differentiation overhauls tactics and makes system includes:
a risk identification module 210, configured to obtain an equipment risk mapping table; the equipment risk mapping table comprises component names, risk factors and risk reasons of the power distribution network equipment;
the risk measurement and calculation module 220 is used for obtaining the fault probability of the power distribution network equipment according to the equipment risk mapping table; the risk measurement and calculation module 220 is further configured to obtain a risk result corresponding to each type of equipment fault according to the power loss cost and the material loss cost of each type of equipment fault;
the risk grading module 230 is configured to perform risk grading on various equipment faults according to the fault probability and risk consequences corresponding to the equipment faults to obtain risk grade information of the power distribution network equipment;
and a strategy making module 240, configured to generate a maintenance strategy corresponding to the power distribution network device according to the risk level information and the key constraint condition.
In the embodiment of the invention, the risk measurement module is further configured to obtain the material loss cost according to the equipment acquisition cost, the equipment maintenance cost and the equipment state coefficient; the risk measurement and calculation module is also used for obtaining the power loss cost according to the load loss, the electricity selling price and the electricity purchasing price caused in the time period when the equipment cannot operate; and the risk measurement and calculation module is also used for obtaining the risk consequence corresponding to the fault of each type of equipment according to the material loss cost and the power loss cost.
In the embodiment of the present invention, the risk identification module is further configured to obtain component names, risk factors, and risk reasons of all power distribution network devices that need to be maintained.
In the embodiment of the invention, the risk measurement module is further configured to construct a scoring model according to the equipment risk mapping table to obtain scoring information of states of each component of the power distribution network equipment; the risk measurement and calculation module is further used for calculating state grading information of the power distribution network equipment according to the grading information of the states of all the components of the power distribution network equipment to obtain the fault probability of the power distribution network equipment.
In an embodiment of the present invention, the risk level information includes a severity status, an abnormal status, an attention status, and a normal status.
In the embodiment of the invention, the maintenance strategy comprises power-off maintenance and non-power-off maintenance.
For specific limitations of the power distribution network equipment differential maintenance strategy making system, reference may be made to the above limitations of the power distribution network equipment differential maintenance strategy making method, which is not described herein again. All modules in the power distribution network equipment differentiated maintenance strategy making system can be completely or partially realized through software, hardware and a combination of the software and the hardware. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
Referring to fig. 3, an embodiment of the invention provides a computer terminal device, which includes one or more processors and a memory. The memory is coupled to the processor and is used for storing one or more programs, and when the one or more programs are executed by the one or more processors, the one or more processors implement the differentiated service strategy making method for the power distribution network equipment according to any one of the above embodiments.
The processor is used for controlling the overall operation of the computer terminal equipment so as to complete all or part of the steps of the method for making the differentiated maintenance strategy of the power distribution network equipment. The memory is used to store various types of data to support the operation at the computer terminal device, which data may include, for example, instructions for any application or method operating on the computer terminal device, as well as application-related data. The Memory may be implemented by any type of volatile or non-volatile Memory device or combination thereof, such as Static Random Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read-Only Memory (EPROM), Programmable Read-Only Memory (PROM), Read-Only Memory (ROM), magnetic Memory, flash Memory, magnetic disk, or optical disk.
In an exemplary embodiment, the computer terminal Device may be implemented by one or more Application Specific 1 integrated circuits (AS 1C), a Digital Signal Processor (DSP), a Digital Signal Processing Device (DSPD), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), a controller, a microcontroller, a microprocessor or other electronic components, and is configured to perform the above-mentioned differential maintenance strategy making method for the power distribution network Device, and achieve the technical effects consistent with the above-mentioned method.
In another exemplary embodiment, a computer readable storage medium including a computer program is further provided, where the computer program is executed by a processor to implement the steps of the differentiated service policy making method for power distribution network equipment in any one of the above embodiments. For example, the computer-readable storage medium may be the memory including the computer program, and the computer program may be executed by a processor of a computer terminal device to complete the method for making the differentiated maintenance strategy of the power distribution network device, and achieve the technical effects consistent with the method.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (10)
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111038670.9A CN113673725A (en) | 2021-09-06 | 2021-09-06 | A method and system for formulating a differentiated maintenance strategy for distribution network equipment |
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