CN116780782B - Comprehensive maintenance system for electrical equipment of power distribution network - Google Patents
Comprehensive maintenance system for electrical equipment of power distribution network Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00001—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
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- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
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- H—ELECTRICITY
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- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00036—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers
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Abstract
The application discloses a comprehensive maintenance system for electrical equipment of a power distribution network, which relates to the technical field of power engineering and comprises a numbering module, a monitoring module, an analysis module and a maintenance module; the monitoring module acquires a plurality of data of the grounding switch to generate an early warning mechanism for the grounding switch, the analyzing module analyzes the running state of the grounding switch through the early warning mechanism at regular time, when the future running state of the grounding switch is predicted to be unable to continuously support the use of the power distribution network equipment, an early warning signal is sent out, and an maintainer maintains or replaces the grounding switch after receiving the early warning signal.
Description
Technical Field
The application relates to the technical field of power engineering, in particular to a comprehensive maintenance system for electrical equipment of a power distribution network.
Background
The power distribution network comprises various electrical equipment, and the grounding switch belongs to one of the electrical equipment and is used for grounding the equipment, and the grounding switch is used for connecting a metal shell or other metal parts of the equipment with the ground so as to protect personnel and the equipment from the danger of electric shock;
in order to realize effective maintenance and management of the grounding switch in the power distribution network, a grounding switch maintenance system is developed, and the grounding switch maintenance system comprehensively monitors and manages the grounding switch and realizes functions of fault early warning and the like of the grounding switch.
The prior art has the following defects:
the existing maintenance system usually carries out fault early warning on the grounding switch, namely when the grounding switch fails, the maintenance system gives an alarm, however, when the grounding switch fails, the grounding switch cannot be used, an alarm signal needs to reach the position of the grounding switch for a certain time, and at this time, if the power distribution network equipment connected with the grounding switch is in a working state that can not be stopped (such as that the power distribution network equipment is stopped after the current power distribution operation is not completed, excessive economic loss is caused), operators or the power distribution network equipment is easily caused to be in danger of electric shock, so that the safety and reliability of the power distribution network are not guaranteed.
Disclosure of Invention
The application aims to provide a comprehensive maintenance system for electric equipment of a power distribution network, which aims to solve the defects in the background technology.
In order to achieve the above object, the present application provides the following technical solutions: the comprehensive maintenance system for the electrical equipment of the power distribution network comprises a numbering module, a monitoring module, an analysis module and a maintenance module;
numbering module: after the maintainer inputs all the grounding switches and grounding switch information in the power distribution network, the grounding switches are randomly numbered, unique marks are generated for each grounding switch, and after all the grounding switches are sequenced in ascending order, the initialization of a sequencing table is completed;
and a monitoring module: when the power distribution network equipment operates, acquiring a plurality of data of the grounding switch, and generating an early warning mechanism for the grounding switch;
and an analysis module: analyzing the running state of the grounding switch through an early warning mechanism at regular time, and sending out an early warning signal when the future running state of the grounding switch is predicted to be incapable of continuously supporting the use of power distribution network equipment;
and a maintenance module: and when all the grounding switches are maintained regularly, updating the sequencing order of the grounding switches by combining the early warning mechanism and the initial sequencing table to generate a maintenance sequencing table.
In a preferred embodiment, the monitoring module comprises an acquisition unit, a calculation unit and a comparison unit;
the acquisition unit is used for acquiring multiple data of the grounding switch when the power distribution network equipment runs, the calculation unit is used for comprehensively processing the multiple data of the grounding switch, then, the switching coefficient is obtained through formula calculation, and the comparison unit is used for comparing the switching coefficient with a set threshold value to complete establishment of an early warning mechanism.
In a preferred embodiment, the collecting unit is configured to collect a plurality of data of the grounding switch when the power distribution network device is running, where the plurality of data includes a switching parameter and a circuit parameter, the switching parameter includes a grounding disconnecting link integrity and a grounding contact oxidation degree, and the circuit parameter includes an over-current and an over-voltage equivalent energy.
In a preferred embodiment, the calculation unit calculates the switch coefficient comprehensively after removing the dimensions of the integrity of the grounding switch, the oxidation degree of the grounding contact, the over-current and over-voltage equivalent energy, and the expression is:the method comprises the steps of carrying out a first treatment on the surface of the In (1) the->For the switching coefficient +.>For the integrity of the grounding switch, +.>For the oxidation degree of the ground contact, +.>For the over-current and over-voltage equivalent energy, < + >>The ratio coefficients of the equivalent energy of the grounding switch integrity, the grounding contact oxidation degree and the over-current and over-voltage are respectively +.>Are all greater than 0.
In a preferred embodiment, the calculation formula of the integrity of the grounding switch is as follows:the method comprises the steps of carrying out a first treatment on the surface of the In (1) the->For the initial thickness of the earthing knife-switch +.>The current thickness of the grounding disconnecting link; the calculation formula of the oxidation degree of the grounding contact is as follows: />Wherein->For monitoring the resistance value of the ground contact, < >>The resistance value of the ground contact in the initial state.
In a preferred embodiment, the processing logic for over-current and over-voltage equivalent energy is:
the calculation expression of the overvoltage equivalent energy is as follows:the method comprises the steps of carrying out a first treatment on the surface of the In (1) the->Is overvoltage equivalent energy, < >>Is the root of the square of the overvoltage, +.>For overvoltage duration;
the calculation expression of the overcurrent equivalent energy is as follows:the method comprises the steps of carrying out a first treatment on the surface of the In (1) the->Is overcurrent equivalent energy, < >>Is the root of the over-current square>For the duration of the overcurrent;
the calculation expression of the over-current and over-voltage equivalent energy is as follows:。
in a preferred embodiment, the analysis module includes a judging unit and an early warning unit;
the judging unit analyzes the running state of the grounding switch according to the early warning mechanism, and the early warning unit sends out an early warning signal when the future running state of the grounding switch is predicted to be unable to continuously support the use of the power distribution network equipment.
In a preferred embodiment, the determining unit analyzes the operating state of the grounding switch according to the early warning mechanism, including the steps of:
if the switching coefficient of the grounding switchSetting threshold +.>When the power distribution network equipment is in operation, the judging unit analyzes that the operation state of the grounding switch is about to not support the operation of the power distribution network equipment, and the early warning unit sends out an early warning signal;
if the switching coefficient of the grounding switchSetting threshold +.>And when the power distribution network equipment is in operation, the judging unit analyzes the operation state of the grounding switch to support the operation of the power distribution network equipment, and the early warning unit does not send out an early warning signal.
In a preferred embodiment, the maintenance module includes a log acquisition unit, a processing unit, and a sorting unit;
the log obtaining unit is used for obtaining the using frequencies of all the grounding switches from the system log, obtaining the average value of the switching coefficients of the grounding switches, obtaining maintenance ordering values after the processing unit carries out weighted calculation on the average value of the switching coefficients and the using frequencies, and after the ordering unit reorders the grounding switches according to the ordering values from large to small and updates the ordering table, maintenance personnel select the maintenance order of all the grounding switches according to the positive order of the maintenance ordering table.
In a preferred embodiment, the calculation expression of the ranking value is:wherein->For the ranking value>Is the average value of the switch coefficients>The use frequency of the grounding switch is as follows;
the calculation expression of the average value of the switching coefficient is as follows:；/>sum value for all switching coefficients in the non-maintenance period, +.>Collecting the times of all the switching coefficients in the undeveloped time period;
the calculation expression of the frequency of use of the grounding switch is:wherein->For earthing switchTotal duration of use during a time period, +.>For a non-maintenance period.
In the technical scheme, the application has the technical effects and advantages that:
1. according to the application, a monitoring module is used for acquiring a plurality of data of the grounding switch to generate an early warning mechanism for the grounding switch, an analysis module is used for analyzing the running state of the grounding switch at regular time through the early warning mechanism, when the future running state of the grounding switch is predicted to be unable to continuously support the use of power distribution network equipment, an early warning signal is sent out, an maintainer maintains or replaces the grounding switch after receiving the early warning signal, and the maintenance system is used for carrying out fault prediction on all the grounding switches in the power distribution network, so that early warning can be sent out before the grounding switch fails, and thus, the grounding switch can still be grounded for the power distribution network equipment before the maintainer reaches the position of the grounding switch, and the safety and reliability of the power distribution network are greatly improved;
2. according to the application, after the dimension is removed by the calculation unit from the grounding disconnecting link integrity, the grounding contact oxidation degree, the overcurrent and overvoltage equivalent energy, the switching coefficient is comprehensively calculated and obtained, so that multi-source data related to the grounding switch are comprehensively analyzed, fault prediction can be carried out on the grounding switch, and the processing efficiency of the data is improved;
3. the log obtaining unit is used for obtaining the using frequencies of all the grounding switches from the system log, obtaining the average value of the switching coefficients of the grounding switches, the processing unit obtains the maintenance sorting value after carrying out weighted calculation on the average value of the switching coefficients and the using frequencies, the sorting unit reorders the grounding switches from large to small according to the sorting value, and after updating the sorting table, maintenance personnel select the maintenance sequence of all the grounding switches according to the positive sequence of the maintenance sorting table, so that the maintenance efficiency of the grounding switches is effectively improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments described in the present application, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art.
FIG. 1 is a block diagram of a system according to the present application.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Example 1: referring to fig. 1, the comprehensive maintenance system for electrical equipment of a power distribution network according to the present embodiment includes a numbering module, a monitoring module, an analysis module and a maintenance module;
the method comprises the steps that an maintainer inputs all grounding switches and grounding switch information in a power distribution network into a numbering module, the grounding switch information comprises positioning information of the grounding switches and power distribution network equipment information connected with the grounding switches, the numbering module generates unique marks for each grounding switch according to the positioning information of the grounding switches and the power distribution network equipment information connected with the grounding switches after ascending order sequencing is carried out on all the grounding switches, initialization processing of a sequencing table is completed, initial sequencing table information is sent to a maintenance module, when the power distribution network equipment operates, a monitoring module acquires multiple data of the grounding switches, an early warning mechanism is generated for the grounding switches, the early warning mechanism information is sent to an analysis module and a maintenance module, the analysis module analyzes the operation state of the grounding switches through the early warning mechanism at regular time, when the future operation state of the grounding switches cannot be predicted to continuously support the power distribution network equipment, after the early warning signal is received, the maintainer positions the grounding switches according to the positioning information of the grounding switches and the power distribution network equipment information connected with the grounding switches, then maintains or replaces the grounding switches in a state that all the power distribution network equipment is not stopped, when the grounding switches are periodically maintained, the early warning module is combined with the early warning module and updates the sequencing table, and the maintenance table is selected according to the sequencing order, and maintenance staff maintains the sequencing table.
It should be noted that, in order to further ensure the operation safety and reliability of the power distribution network equipment, when the maintainer maintains or replaces the current grounding switch, it is necessary to connect a temporary grounding switch in parallel with the power distribution network equipment again, and after the current grounding switch is maintained or replaced, the temporary grounding switch is removed.
According to the power distribution network fault early warning system, the monitoring module is used for acquiring multiple data of the grounding switch to generate an early warning mechanism for the grounding switch, the analyzing module is used for analyzing the running state of the grounding switch at regular time through the early warning mechanism, when the future running state of the grounding switch is predicted to be incapable of continuously supporting the use of power distribution network equipment, an early warning signal is sent out, an maintainer maintains or replaces the grounding switch after receiving the early warning signal, the maintenance system is used for carrying out fault prediction on all the grounding switches in the power distribution network, so that early warning can be sent out before the grounding switch fails, and the grounding switch can still be grounded for the power distribution network equipment before the maintainer reaches the position of the grounding switch, and the safety and the reliability of the power distribution network are greatly improved.
Example 2: the monitoring module acquires a plurality of data of the grounding switch, generates an early warning mechanism for the grounding switch, and sends early warning mechanism information to the analysis module and the maintenance module.
The monitoring module comprises an acquisition unit, a calculation unit and a comparison unit;
the acquisition unit is used for acquiring multiple data of the grounding switch when the power distribution network equipment runs, the calculation unit is used for comprehensively processing the multiple data of the grounding switch, the switching coefficient is obtained through formula calculation, and the comparison unit is used for comparing the switching coefficient with a set threshold value to complete establishment of an early warning mechanism.
The power distribution network equipment comprises a power distribution network equipment, a power distribution network acquisition unit, a power distribution network switching unit and a power distribution network switching unit, wherein the power distribution network equipment is connected with the power distribution network equipment through the power distribution network equipment, the power distribution network equipment is connected with the power distribution network equipment through the power distribution network equipment, the power distribution network equipment is connected with the power distribution network equipment, and the power distribution network equipment is connected with the power distribution network, and the power distribution network equipment through the;
the computing unit calculates the integrity of the grounding switch, the oxidation degree of the grounding contact, and the overcurrentAfter the dimension is removed by the overvoltage equivalent energy, the switching coefficient is obtained by comprehensive calculation, and the expression is as follows:the method comprises the steps of carrying out a first treatment on the surface of the In (1) the->For the switching coefficient +.>For the integrity of the grounding switch, +.>For the oxidation degree of the ground contact, +.>For the over-current and over-voltage equivalent energy, < + >>The ratio coefficients of the equivalent energy of the grounding switch integrity, the grounding contact oxidation degree and the over-current and over-voltage are respectively +.>Are all greater than 0.
The calculation formula of the integrity of the grounding disconnecting link is as follows:the method comprises the steps of carrying out a first treatment on the surface of the In (1) the->For the initial thickness of the earthing knife-switch +.>For the current thickness of the grounding disconnecting link, the thickness of the grounding disconnecting link is monitored on line through an ultrasonic sensor arranged at the grounding disconnecting link;
the logic for obtaining the oxidation degree of the ground contact is as follows: calculated by monitoring the change of the oxidation resistance of the ground contact, in particular, the resistance of the ground contact is inversely related to the oxidation thereof, and when the oxidation degree of the surface of the ground contact is higher, the resistance thereof is alsoThe larger, therefore, the oxidation degree can be calculated by measuring the resistance value of the ground contact and comparing with its initial value, the calculation expression is:wherein->To monitor the resistance of the ground contact at the time of monitoring,and in order to obtain the resistance value of the grounding contact in the initial state, the resistance value of the grounding contact is monitored on line through a resistance type sensor.
The processing logic of the over-current and over-voltage equivalent energy is as follows:
for transient overvoltage, the equivalent energy can be obtained by calculating the square root value and the duration of the overvoltage, so that the calculation expression of the overvoltage equivalent energy is as follows:the method comprises the steps of carrying out a first treatment on the surface of the In (1) the->Is overvoltage equivalent energy, < >>Is the root of the square of the overvoltage, +.>For overvoltage duration;
for instantaneous overcurrent, the equivalent energy can be obtained by calculating the square root value and the duration of the overcurrent, so that the calculation expression of the overcurrent equivalent energy is as follows:the method comprises the steps of carrying out a first treatment on the surface of the In (1) the->Is overcurrent equivalent energy, < >>Is the root of the over-current square>For the duration of the overcurrent;
the calculation expression of the over-current and over-voltage equivalent energy is:the larger the value of the over-current and over-voltage equivalent energy, the greater the risk of the grounding switch being damaged or faulty;
the calculation expression of the square root value of the overvoltage is as follows:the method comprises the steps of carrying out a first treatment on the surface of the In (1) the->Represents the sampling time, +.>Is indicated at->Voltage value at time.
The calculation expression of the square root value of the overcurrent is as follows:the method comprises the steps of carrying out a first treatment on the surface of the In (1) the->Represents the sampling time, +.>Is indicated at->Current value at time.
The comparison unit obtains the switching coefficientAfter that, the switching coefficient is->And set threshold +.>And comparing to generate an early warning mechanism.
The analysis module is used for analyzing the running state of the grounding switch at regular time through an early warning mechanism, sending out an early warning signal when the future running state of the grounding switch is predicted to be incapable of continuously supporting the use of the power distribution network equipment, and after receiving the early warning signal, an maintainer is used for positioning the position of the grounding switch for sending out the early warning signal according to the positioning information of the grounding switch and the information of the power distribution network equipment connected with the grounding switch, and then maintaining or replacing the grounding switch in a state that the power distribution network equipment is not stopped.
The analysis module comprises a judging unit and an early warning unit;
the judging unit analyzes the running state of the grounding switch according to the early warning mechanism, and when the future running state of the grounding switch is predicted to be unable to continuously support the use of the power distribution network equipment, the early warning unit sends out an early warning signal, specifically:
if the switching coefficient of the grounding switchSetting threshold +.>When the power distribution network equipment is in operation, the judging unit analyzes that the operation state of the grounding switch is about to not support the operation of the power distribution network equipment, and the early warning unit sends out an early warning signal;
if the switching coefficient of the grounding switchSetting threshold +.>And when the power distribution network equipment is in operation, the judging unit analyzes the operation state of the grounding switch to support the operation of the power distribution network equipment, and the early warning unit does not send out an early warning signal.
According to the application, after the dimension is removed by the calculation unit from the grounding disconnecting link integrity, the grounding contact oxidation degree, the overcurrent and overvoltage equivalent energy, the switching coefficient is comprehensively calculated and obtained, so that the multi-source data related to the grounding switch are comprehensively analyzed, the fault prediction can be carried out on the grounding switch, and the data processing efficiency is improved.
Example 3: the method comprises the steps that an maintainer inputs all grounding switches and grounding switch information in a power distribution network into a numbering module, wherein the grounding switch information comprises positioning information of the grounding switches and power distribution network equipment information connected with the grounding switches, the numbering module randomly numbers the grounding switches, generates unique marks for each grounding switch, and after all the grounding switches are sequenced in ascending order, the initialization processing of a sequencing table is completed;
the maintenance module is combined with the early warning mechanism and the initial sequencing table to update the sequencing order of the grounding switches, a maintenance sequencing table is generated, and maintenance personnel select the maintenance order of all the grounding switches according to the positive sequence of the maintenance sequencing table.
The numbering module randomly numbers the grounding switches, generates a unique mark for each grounding switch, and completes the initialization processing of the ordering table after the ascending order ordering of all the grounding switches, wherein the initialization processing comprises the following steps:
assuming that 8 grounding switches are used in the power distribution network, the numbering table is { k } 6 、k 2 、k 3 、k 4 、k 8 、k 1 、k 5 、k 7 After all the grounding switches are sequenced in ascending order, the initialization processing of the sequencing table is completed, and the initial sequencing table is { k } 1 、k 2 、k 3 、k 4 、k 5 、k 6 、k 7 、k 8 }。
The maintenance module comprises a log acquisition unit, a processing unit and a sequencing unit;
the log obtaining unit is used for obtaining the using frequencies of all the grounding switches from the system log, obtaining the average value of the switching coefficients of the grounding switches, obtaining maintenance ordering values after the processing unit carries out weighted calculation on the average value of the switching coefficients and the using frequencies, and after the ordering unit reorders the grounding switches according to the ordering values from large to small and updates the ordering table, maintenance personnel select the maintenance order of all the grounding switches according to the positive order of the maintenance ordering table.
The calculation expression of the ranking value is:wherein->For the ranking value>Is the average value of the switch coefficients>Is the frequency of use of the grounding switch.
The obtaining logic of the average value of the switching coefficient is as follows: marking the sum value of all switch coefficients in the undetermined time period asAll switching coefficient acquisition times during the maintenance-free period are marked as +.>The calculation expression of the average value of the switching coefficient is: />The non-maintenance time period in the present application is equal to the current maintenance time minus the last maintenance end time.
The calculation expression of the frequency of use of the grounding switch is:wherein->For earthing switchTotal duration of use during a time period, +.>For a non-maintenance period.
The log obtaining unit is used for obtaining the using frequencies of all the grounding switches from the system log, obtaining the average value of the switching coefficients of the grounding switches, the processing unit obtains the maintenance sorting value after carrying out weighted calculation on the average value of the switching coefficients and the using frequencies, the sorting unit reorders the grounding switches from large to small according to the sorting value, and after updating the sorting table, maintenance personnel select the maintenance sequence of all the grounding switches according to the positive sequence of the maintenance sorting table, so that the maintenance efficiency of the grounding switches is effectively improved.
The above formulas are all formulas with dimensions removed and numerical values calculated, the formulas are formulas with a large amount of data collected for software simulation to obtain the latest real situation, and preset parameters in the formulas are set by those skilled in the art according to the actual situation.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the application disclosed above are intended only to assist in the explanation of the application. The preferred embodiments are not intended to be exhaustive or to limit the application to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the application and the practical application, to thereby enable others skilled in the art to best understand and utilize the application. The application is limited only by the claims and the full scope and equivalents thereof.
Claims (7)
1. The utility model provides a distribution network electrical equipment comprehensive maintenance system which characterized in that: the system comprises a numbering module, a monitoring module, an analysis module and a maintenance module;
numbering module: after the maintainer inputs all the grounding switches and grounding switch information in the power distribution network, the grounding switches are randomly numbered, unique marks are generated for each grounding switch, and after all the grounding switches are sequenced in ascending order, the initialization of a sequencing table is completed;
and a monitoring module: when the power distribution network equipment operates, acquiring a plurality of data of the grounding switch, and generating an early warning mechanism for the grounding switch;
and an analysis module: analyzing the running state of the grounding switch through an early warning mechanism at regular time, and sending out an early warning signal when the future running state of the grounding switch is predicted to be incapable of continuously supporting the use of power distribution network equipment;
and a maintenance module: when all the grounding switches are maintained regularly, the sorting order of the grounding switches is updated by combining an early warning mechanism and an initial sorting table, and a maintenance sorting table is generated;
the monitoring module comprises an acquisition unit, a calculation unit and a comparison unit;
the acquisition unit is used for acquiring multiple data of the grounding switch when the power distribution network equipment operates, the calculation unit is used for comprehensively processing the multiple data of the grounding switch, then, the switching coefficient is obtained through formula calculation, and the comparison unit is used for comparing the switching coefficient with a set threshold value to complete establishment of an early warning mechanism;
the acquisition unit is used for acquiring a plurality of data of the grounding switch when the power distribution network equipment operates, wherein the plurality of data comprise switching parameters and circuit parameters, the switching parameters comprise the integrity of the grounding disconnecting link and the oxidation degree of the grounding contact, and the circuit parameters comprise the over-current and over-voltage equivalent energy;
the calculation unit removes the dimension of the grounding disconnecting link integrity, the grounding contact oxidation degree, the overcurrent and overvoltage equivalent energy, and then comprehensively calculates and obtains a switching coefficient, wherein the expression is as follows:in kg of x Is the switching coefficient, dz k For the integrity of the grounding switch, ct k To the oxidation degree of the ground contact, dx g For the over-current and over-voltage equivalent energy, alpha, beta and gamma are respectively earthing knife-switchIntegrity, oxidation degree of the grounding contact, and ratio coefficient of over-current and over-voltage equivalent energy, and alpha, beta and gamma are all larger than 0.
2. The comprehensive maintenance system for electrical equipment in a power distribution network according to claim 1, wherein: the calculation formula of the grounding disconnecting link integrity is as follows: dz k =1- (h 1-h 2)/h 1; wherein h1 is the initial thickness of the grounding switch, and h2 is the current thickness of the grounding switch; the calculation formula of the oxidation degree of the grounding contact is as follows: ct (ct) k = (R-R0)/R0, where R is the resistance value of the ground contact during monitoring, and R0 is the resistance value of the ground contact in the initial state.
3. The comprehensive maintenance system for electrical equipment in a power distribution network according to claim 1, wherein: the processing logic of the overcurrent and overvoltage equivalent energy comprises the following steps:
the calculation expression of the overvoltage equivalent energy is as follows: e_v=u_rms 2 * v_d; wherein E_v is the overvoltage equivalent energy, U_rms is the square root of the overvoltage, and v_d is the overvoltage duration;
the calculation expression of the overcurrent equivalent energy is as follows: e_i=i_rms 2 * i_d; wherein E_i is the overcurrent equivalent energy, I_rms is the square root value of the overcurrent, and i_d is the overcurrent duration;
the calculation expression of the over-current and over-voltage equivalent energy is as follows: dx (dx) g ＝E_v+E_i。
4. The comprehensive maintenance system for electrical equipment in a power distribution network according to claim 2, wherein: the analysis module comprises a judging unit and an early warning unit;
the judging unit analyzes the running state of the grounding switch according to the early warning mechanism, and the early warning unit sends out an early warning signal when the future running state of the grounding switch is predicted to be unable to continuously support the use of the power distribution network equipment.
5. The comprehensive maintenance system for electrical equipment in a power distribution network according to claim 4, wherein: the judging unit analyzes the running state of the grounding switch according to the early warning mechanism, and comprises the following steps:
if the switching coefficient kg of the grounding switch x >When a threshold yz is set, the judging unit analyzes that the running state of the grounding switch is about to not support the running of the power distribution network equipment, and the early warning unit sends out an early warning signal;
if the switching coefficient kg of the grounding switch x When the set threshold yz is less than or equal to the set threshold yz, the judging unit analyzes the running state of the grounding switch to support the running of the power distribution network equipment, and the early warning unit does not send out an early warning signal.
6. The comprehensive maintenance system for electrical equipment in a power distribution network according to claim 5, wherein: the maintenance module comprises a log acquisition unit, a processing unit and a sequencing unit;
the log obtaining unit is used for obtaining the using frequencies of all the grounding switches from the system log, obtaining the average value of the switching coefficients of the grounding switches, obtaining maintenance ordering values after the processing unit carries out weighted calculation on the average value of the switching coefficients and the using frequencies, and after the ordering unit reorders the grounding switches according to the ordering values from large to small and updates the ordering table, maintenance personnel select the maintenance order of all the grounding switches according to the positive order of the maintenance ordering table.
7. The electrical equipment integrated maintenance system for a power distribution network of claim 6, wherein: the calculation expression of the sorting value is as follows: px (px) z ＝0.7pj z +0.3pl z In which px is z For ranking values, pj z Is the average value of the switch coefficients, pl z The use frequency of the grounding switch is as follows;
the calculation expression of the average value of the switching coefficient is as follows: pj z =qh/cs; qh is the sum value of all the switching coefficients in the undetermined time period, and cs is the collection times of all the switching coefficients in the undetermined time period;
the calculation expression of the frequency of use of the grounding switch is: pl (pl) z =sc/wh, where sc is the total time of use of the grounding switch during wh, wh is the maintenance-free timeA time period.
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