CN110119907A - A kind of method for evaluating reliability of electric railway traction power supply system - Google Patents

Abstract

The invention provides a reliability evaluation method for an electrified railway traction power supply system, comprising: collecting data information of the electrified railway traction power supply system, and recording the data information in a database; Classification and analysis are carried out on the use status, fault category and type of facilities of each electrical equipment and traction power supply unit; according to the results of the classification analysis, the traction power supply system of the electrified railway is evaluated using the reliability evaluation index, and the management information system or safety The existing statistical indicators of the production dispatch command system are integrated to establish a reliability evaluation technology system for the traction power supply system of the electrified railway, and the reliability of the traction power supply system of the electrified railway is evaluated by using the evaluation indicators in the reliability evaluation technology system. The reliability evaluation method of the traction power supply system of the electrified railway proposed by the present invention fully considers the traction power supply characteristics of the electrified railway in my country and combines the design characteristics and operation characteristics of my country's high-speed railway, and establishes a scientific Quantitative evaluation index of reliability.

Description

A reliability evaluation method of traction power supply system for electrified railway

technical field

The invention relates to the technical field of big data, in particular to a reliability evaluation method of an electrified railway traction power supply system.

Background technique

The traction power supply system is the infrastructure and an important part of the electrified railway, providing power energy for the train, and its operational reliability is directly related to the reliability of the electrified railway. Due to the complexity of the operating environment and operating conditions, the failure of traction power supply and transformation equipment, catenary, etc. is inevitable; at the same time, due to the particularity of the traction power supply system of electrified railways, the probability of equipment failure or power supply failure is still higher than that of the power system. high. The consequences of different types of failures are different. In severe cases, the power supply will be interrupted, which will directly cause the train to be delayed or even have to be cancelled.

With the large-scale construction of electrified railways, the reliability, availability, maintainability and safety (RAMS) issues of electrified railways have attracted much attention. Internationally, the RAMS evaluation standard EN50126 for rail transit systems has been proposed as early as 1999, although in 2002, my country also formulated IEC62278: 2002 "Rail Transit - Reliability, Availability, Maintainability and Safety" according to this standard. Specifications and Examples", the first part of which has been raised to the IEC standard and adopted by my country's national standard, but its content only explains the terms related to rail transit RAMS, and does not explicitly propose the power supply and transformation equipment and operating lines for electrified railways. evaluation criteria. Since the introduction of the definition of reliability, scholars from all over the world have been devoted to exploring a practical quantitative evaluation method for the reliability of large-scale electrified railways.

Compared with these countries in the world and my country's power system industry, the research on the reliability of electrified railway traction power supply system in my country's railway industry started relatively late, and the research work was carried out very slowly. The reliability management and reliability-based maintenance strategy of the traction power supply system of the electrified railway are the current weak links, and there is no technical system for quantitative evaluation of the reliability of the traction power supply system in China.

In addition, the reliability research of the traction power supply system of the electrified railway involves a wide range, has a long duration and a huge workload, and involves the collection, statistics and analysis of massive data. The collection of big data includes the various electrical equipment and Initial information, safety information, fault information, equipment change information of the traction power supply unit, and safety information and fault information of the traction power supply system. Secondly, the professional processing of big data such as data mining and reliability evaluation is carried out. At the same time, it should be integrated with the existing statistical indicators of the three-layer management information system of the power supply section, the railway bureau, and the general public office or the safety production dispatching command system to fully share resources.

In order to evaluate the reliability of the traction power supply system of the electrified railway more scientifically and improve the operation and maintenance level, it is necessary to study the reliability evaluation method of the traction power supply system of the electrified railway.

SUMMARY OF THE INVENTION

Embodiments of the present invention provide a reliability evaluation method for an electrified railway traction power supply system to overcome the defects of the prior art.

In order to achieve the above objects, the present invention adopts the following technical solutions.

A reliability evaluation method for an electrified railway traction power supply system, comprising:

Collect the data information of the traction power supply system of the electrified railway, and record the data information in the database;

According to the data information, classify and analyze the use status, fault type and facility type of each electrical equipment and traction power supply unit in the traction power supply system of the electrified railway;

According to the results of the classification analysis, the traction power supply system of the electrified railway is evaluated by the reliability evaluation index, and the reliability evaluation of the traction power supply system of the electrified railway is established by integrating with the existing statistical indicators of the management information system or the safety production dispatching command system. A technical system, using the evaluation indexes in the reliability evaluation technical system to evaluate the reliability of the traction power supply system of the electrified railway.

Preferably, the collecting data information of the traction power supply system of the electrified railway, and recording the data information in a database, includes: collecting basic information of the traction power supply system of the electrified railway, that is, collecting the electrical information of each electric power supply system in the traction power supply system of the electrified railway. Initial information, safety information, fault information, equipment change information, and safety information and fault information of the traction power supply system of equipment and traction power supply units;

Collect the usage status of each electrical equipment and traction power supply unit in the traction power supply system of the electrified railway, including: the available status and the unavailable status of each electrical equipment and traction power supply unit, the available status is divided into running and standby; the unavailable status The status includes planned outages and unplanned outages, the planned outages include sunroof outages, maintenance outages, renovation construction outages, and temporary outages;

The collected basic information of the traction power supply system of the electrified railway and the usage status of each electrical equipment and traction power supply unit in the traction power supply system of the electrified railway are stored in a database.

Preferably, according to the data information, the use status, fault category and facility type of each electrical equipment and traction power supply unit in the electrified railway traction power supply system are classified and analyzed, including:

Classify the use status of equipment in the traction power supply system of the electrified railway, including: available status and unavailable status, the available status is divided into running and standby; the unavailable status includes planned outage and unplanned outage, so The above planned outages include skylight outages, maintenance outages, renovation construction outages, and temporary outages;

Classification of equipment failures in the traction power supply system of the electrified railway, including: equipment aging, equipment failures, train failures, natural factors, human factors, bird damage, foreign objects and other factors;

Classify the types of facilities in the traction power supply system of the electrified railway, including: power supply equipment, traction network power supply units and operation lines.

Preferably, the reliability evaluation index is used to evaluate the traction power supply system of the electrified railway according to the result of the classification analysis, and it is integrated with the existing statistical indicators of the management information system or the safety production dispatching command system to establish the traction power supply system of the electrified railway. Reliability evaluation technology system, including:

Calculate the reliability evaluation common indicators in the traction power supply system of the electrified railway:

The available coefficient AF represents the probability that the statistical object can complete the predetermined function within the statistical time, namely

In the formula, the available hours AH is the number of hours that the statistical object is available in the statistical period;

The running coefficient SF represents the probability that the statistical object is in a working state during the statistical time, that is,

In the formula, the operating hours SH is the number of hours that the statistical object is in the running state during the statistical period, that is,

Operating hours SH = available hours AH - standby hours RH (3)

The planned outage factor POF, which represents the probability that the statistical object is in the planned outage state during the statistical time, namely

In the formula, the POH of planned outage hours is the sum of the hours when the statistical object is in the state of skylight outage, maintenance outage, renovation construction outage and temporary outage during the statistical period;

The unplanned outage factor UOF represents the probability that the statistical object is in an unplanned outage state during the statistical time, namely

In the formula, the unplanned outage hour UOH is the number of hours that the statistical object is unavailable but not planned outage during the statistical period;

The planned outage rate, POR, indicates the number of times the statistical object is in the planned outage state during the statistical time, that is,

The unplanned outage rate UOR represents the number of times the statistical object is in the unplanned outage state during the statistical time, namely

Average Continuous Availability Time CSH, which means the average duration of each time the statistical object is available in the statistical time, that is,

The exposure rate EXR, which represents the percentage of the ratio of the running time of the statistical object to the available time in the statistical time, reflects the actual operating status of the statistical object, namely

Reliability coefficient RF, which represents the probability that the statistical object is in a non-faulty state within the statistical time, namely

Preferably, the method further includes:

Calculate the specific indicators for reliability evaluation of the traction network power supply unit in the traction power supply system of the electrified railway:

When calculating the planned outage rate and unplanned outage rate of the traction network power supply unit, when the mileage of the power supply unit is known, the formula (11) is used for calculation; when the mileage of the power supply unit is unknown, only the number of traction power supply units is known. When , the formula (12) is used for calculation; the planned outage rate of the power supply unit of the traction network is calculated according to the mileage of the power supply unit of the traction network, that is

Calculated according to the number of power supply units in the traction network, namely

Preferably, the method further includes:

Calculate the unique indicators for the reliability evaluation of the traction network of the operating line in the traction power supply system of the electrified railway:

Traction grid power supply unit mean time to failure MT

Traction network power supply unit average number of outages AT

Average duration of power outage of traction network power supply unit ADB

According to the evaluation indicators of each electrical equipment and traction power supply unit in the traction power supply system of the electrified railway, calculate the indicators of multiple sets of similar equipment and the traction network indicators of the operation lines of the electrified railway, and then obtain the statistical indicators of the facilities for many years, which are related to the management information system or the safety production dispatching command. The existing statistical indicators of the system are integrated to establish a reliability evaluation technology system for the traction power supply system of the electrified railway.

It can be seen from the technical solutions provided by the above embodiments of the present invention that the embodiments of the present invention provide a reliability evaluation method for an electrified railway traction power supply system. The reliability evaluation includes the status classification of the traction power supply equipment since the date of commissioning, and according to the statistical time of different states, the indicators of a single (section) power supply equipment in the space, the indicators of multiple (section) power supply equipment of the same type in the space, and the power supply unit of the traction network are evaluated. Quantitative evaluation technology system for reliability of indicators, traction network indicators of electrified railway operation lines, and statistical indicators of facilities for many years. The invention fully considers the structure and operation characteristics of my country's electrified railways, and establishes a reliability quantitative evaluation index and a reliability data collection method from two levels of equipment and systems; studies the collection of reliability data of traction power supply and transformation equipment and traction network power supply units Considering the big data technology involved in the statistical analysis of massive data, the calculation method of the demand and reliability index, the SQL database was established, and the B/S structure electrified railway traction power supply system reliability statistical analysis software was developed to make it compatible with the management information system. Or the safety production dispatching command system is integrated to fully share resources. Thus, the basic data collection and reliability evaluation system of my country's electrified railway traction power supply system is formed, which can be used as the basis for the operation and maintenance department to implement reliability-based maintenance and reliability management.

Additional aspects and advantages of the present invention will be set forth in part in the following description, which will be apparent from the following description, or may be learned by practice of the present invention.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

1 is a flowchart of a reliability evaluation method for an electrified railway traction power supply system provided by an embodiment of the present invention;

FIG. 2 is a classification of equipment use states of an electrified railway traction power supply system provided by an embodiment of the present invention;

3 is a schematic diagram of a SQL database management structure provided by an embodiment of the present invention;

4 is a schematic structural diagram of an initial information record of a SQL database device provided by an embodiment of the present invention;

5 is a schematic structural diagram of a SQL database device operation status record provided by an embodiment of the present invention;

FIG. 6 is a schematic diagram of a reliability evaluation content module of an electrified railway traction power supply system according to an embodiment of the present invention.

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, but not to be construed as a limitation of the present invention.

It will be understood by those skilled in the art that the singular forms "a", "an", "the" and "the" as used herein can include the plural forms as well, unless expressly stated otherwise. It should be further understood that the word "comprising" used in the description of the present invention refers to the presence of stated features, integers, steps, operations, elements and/or components, but does not exclude the presence or addition of one or more other features, Integers, steps, operations, elements, components and/or groups thereof. It will be understood that when we refer to an element as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Furthermore, "connected" or "coupled" as used herein may include wirelessly connected or coupled. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have meanings consistent with their meanings in the context of the prior art and, unless defined as herein, are not to be taken in an idealized or overly formal sense. explain.

In order to facilitate the understanding of the embodiments of the present invention, the following will take several specific embodiments as examples for further explanation and description in conjunction with the accompanying drawings, and each embodiment does not constitute a limitation to the embodiments of the present invention.

An embodiment of the present invention provides a reliability evaluation method for an electrified railway traction power supply system, as shown in FIG. 1 , including:

1) Collect the data information of the traction power supply system of the electrified railway, and record the data information in the database;

2) According to the data information, classify and analyze the usage status, fault category and facility type of each electrical equipment and traction power supply unit in the traction power supply system of the electrified railway;

3) Use the reliability evaluation index to evaluate the traction power supply system of the electrified railway according to the results of the classification analysis, and integrate with the existing statistical indicators of the management information system or the safety production dispatching command system to establish the reliability of the traction power supply system of the electrified railway. The reliability evaluation technology system is used to evaluate the reliability of the traction power supply system of the electrified railway by using the evaluation indexes in the reliability evaluation technology system.

This embodiment provides a reliability evaluation method for an electrified railway traction power supply system, including the following processing steps:

Step 11: Collect the initial situation, operation situation, fault situation and other data information of the traction power supply and transformation equipment of the traction power supply system of the electrified railway and the power supply unit of the traction network, record it in the SQL database, and classify the operation and fault status of the equipment, including:

Collection and recording of big data: The collection and recording of big data includes the initial information, safety information, fault information, equipment change information, and safety information of the traction power supply system and traction power supply units included in the electric railway traction power supply system. Basic information such as fault information. The use status of each electrical equipment and traction power supply unit is mainly divided into available status and unavailable status. Available status is divided into running and standby; unavailable status includes planned outage and unplanned outage, while planned outage includes sunroof outage. , Maintenance outage, renovation construction outage, temporary outage.

Data mining: Data mining is carried out on the collected and recorded big data, and the classification and analysis are carried out according to the use status, fault category and facility type of each electrical equipment and traction power supply unit. As shown, the use status of equipment is mainly divided into available status and unavailable status, and available status is divided into running and standby; unavailable status includes planned outage and unplanned outage, while planned outage includes skylight outage, maintenance outage Transportation, renovation construction outage, temporary outage. The failure categories of equipment are mainly divided into equipment aging, equipment failure, train failure, natural factors, human factors, bird damage, foreign objects and other factors.

The statistical electrified railway traction power supply facilities include power supply equipment, traction network power supply units and operating lines. Power supply equipment includes transformers (including main transformers, self-consumption transformers, and autotransformers), circuit breakers, isolating switches, and current transformers (excluding bushing-type current transformers attached to transformers and circuit breakers that are not registered as independent equipment) , Voltage transformers (including capacitive voltage transformers), arresters, lightning rods, anti-lightning rings, reactors, capacitors, GIS switchgear, cable lines, busbars, relay protection equipment, AC power equipment, telecontrol equipment, etc. The operation line includes an operation line of a power supply section, a certain operation line, and multiple operation lines.

Among them, the SQL database adopts the combination of primary key (PK) and foreign key (foreign key, FK), by setting the primary key to uniquely identify each row in the table, the entity integrity of the table can be guaranteed; by setting the foreign key Make associations between tables and maintain data consistency and database hierarchies. The design of SQL database complies with the design specification of database third normal form (3NF), which makes the database concise and clear in structure and reduces the redundancy of data.

The management structure diagram in the SQL database is shown in Figure 3. The management structure mainly includes road bureau management, power supply section management, line management and the relationship table between lines and power supply sections. Bureau management, power supply section management, and line management tables also include the number of traction stations, the number of AT stations, the number of partition stations, the number of power supply arms, the number of traction network power supply units, the starting and ending kilometers in the line power supply section relationship table, etc. information (omitted from schematic diagram).

Figure 4 is a schematic diagram of the initial information structure of the SQL database management device. Among them, the power supply equipment also includes current transformers, circuit breakers, reactors, isolating switches, bus bars, wave arresters, coupling capacitors, lightning arresters, combined electrical appliances, etc. Each device registry includes initial device information records, such as: device model, installation location, date of manufacture, date of commissioning, etc. (omitted in the schematic diagram).

The equipment operation record structure diagram is shown in Figure 5, which mainly records the operation and changes of the equipment in the traction network power supply unit and the traction substation, as well as the action of the protection device. Among them, each table also includes outage section, outage start and end time, outage duration, failure cause and other information (omitted in the schematic diagram).

Step 12: The present invention divides the reliability evaluation index of the traction power supply system into five modules, as shown in the reliability evaluation content module of the traction power supply system of the electrified railway in FIG. 6 . According to the basic data of the traction power supply system equipment of the electrified railway, the reliability evaluation index is used to calculate the single device and the traction power supply unit (that is, the reliability evaluation index of the single device in the traction substation and the reliability evaluation index of the traction network power supply unit in Figure 6). module) availability factor, operation factor, planned outage factor, unplanned outage factor, planned outage rate, unplanned outage rate, average continuous available hours, exposure rate, reliability factor (and the specific indicators of the traction network power supply unit: Power supply unit average time of outage, average number of outages, average duration of unit outage).

1.1 Common indicators for reliability evaluation:

Taking the reliability evaluation index of a single (segment) power supply equipment as an example, the common indicators of the five modules in Figure 6 are introduced as follows:

(1) The available factor (AF) represents the probability that the statistical object can complete the predetermined function within the statistical time, namely

In the formula, the available hours AH is the number of hours that the statistical object is available in the statistical period.

(2) The operating factor (available factor, SF) represents the probability that the statistical object is in a working state within the statistical time, namely

In the formula, the operating hours SH is the number of hours that the statistical object is in the running state during the statistical period, that is,

Operating hours SH = Available hours AH - Standby hours RH (3)

(3) The planned outage factor (POF) represents the probability that the statistical object is in the planned outage state during the statistical time, namely

In the formula, the POH of planned outage hours is the sum of the hours when the statistical object is in the state of skylight outage, maintenance outage, renovation construction outage and temporary outage during the statistical period.

(4) The unplanned outage factor (UOF) represents the probability that the statistical object is in an unplanned outage state during the statistical time, namely

In the formula, the unplanned outage hour UOH is the number of hours that the statistical object is unavailable but not planned outage during the statistical period.

(5) The planned outage rate (POR) represents the number of times the statistical object is in the planned outage state during the statistical time, namely

(6) The unplanned outage rate (UOR) represents the number of times the statistical object is in the unplanned outage state during the statistical time, namely

(7) The average continuous service hours (continuously service hours, CSH) represents the average time that the statistical objects are in the available state each time during the statistical time, namely

(8) Exposure rate (EXR) represents the percentage of the ratio of the running time of the statistical object to the available time in the statistical time, which reflects the actual operating status of the statistical object, that is,

(9) The reliability factor (RF) represents the probability that the statistical object is in a non-faulty state within the statistical time, namely

1.2 Specific indicators for reliability evaluation of power supply units in traction network

When calculating the planned outage rate and unplanned outage rate of the power supply unit of the traction network, when the mileage of the power supply unit is known, the formula (11) can be used for calculation; when the mileage of the power supply unit is unknown, only the number of traction power supply units is known. When , the formula (12) can be used for calculation. Theoretically, the two calculation results are the same. For example, the planned outage rate of the traction network power supply unit is calculated according to the mileage of the traction network power supply unit, that is

Calculated according to the number of power supply units in the traction network, namely

1.3 Specific indicators for reliability evaluation of traction network of operating lines

Considering the design characteristics and operation characteristics of my country's electrified railways, the traction network of electrified railway operation lines needs to consider the following three unique indicators:

(1) Meantime to fault outage (MT) of traction network power supply unit

(2) Average times of fault outage (AT) of traction network power supply units

(3) The average duration of blackout (ADB) in the power supply unit of the traction network

Step 13: Calculate the reliability evaluation index of multiple devices of the same type and the reliability evaluation index of the traction network of the electrified railway operation line according to the evaluation index of the single device of the traction power supply system of the electrified railway and the evaluation index of the traction power supply unit, and then obtain the statistical evaluation of the reliability of the medium facilities for many years. Integrate with the existing statistical indicators of the three-layer management information system of the power supply section, the railway bureau, and the general public office or the safety production dispatching command system to fully share resources to form a reliability evaluation technology system for my country's electrified railway traction power supply system. The evaluation index in the reliability evaluation technology system evaluates the reliability of the traction power supply system of the electrified railway, and lays a foundation for the operation and maintenance department to implement reliability management and reliability-based maintenance.

The reliability quantitative analysis results are the evaluation index of single equipment of electrified railway traction power supply system, the evaluation index of traction power supply unit, the evaluation index of multiple sets of similar equipment, the evaluation index of traction network of electrified railway operation line and the evaluation index of reliability of facilities for many years. Except for the multi-year reliability evaluation index of the facility, the time length of each statistical index is based on one year.

To sum up, the embodiments of the present invention provide a reliability evaluation method for an electrified railway traction power supply system, which establishes a scientific data acquisition method and a reliability quantitative evaluation index from the two levels of the electrified railway traction power supply system equipment and system; Collection requirements of reliability data of power supply equipment and traction power supply units and calculation methods of reliability indicators, big data technology involving statistical analysis of massive data, and three-layer management information system of power supply section, railway bureau, and general public office or safety production dispatching command The system integrates and fully shares resources to build a world-leading reliability evaluation system for the traction power supply system of electrified railways; promote the application of catenary RCM based on 6C data, improve the technical level of operation and maintenance, and rely on the results of quantitative reliability analysis to evaluate the traction power supply of electrified railways. The reliability of the power supply system is evaluated, which lays the foundation for the operation and maintenance department to implement reliability management and reliability-based maintenance.

Those of ordinary skill in the art can understand that the accompanying drawing is only a schematic diagram of an embodiment, and the modules or processes in the accompanying drawing are not necessarily necessary to implement the present invention.

Those skilled in the art should understand that the application of the above-mentioned SQL database is only an example, and the application of other existing databases (eg, Access database, Oracle) or databases that may appear in the future, if applicable to the embodiments of the present invention, should also be included in this application. The invention is within the scope of protection and is hereby incorporated by reference.

From the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented by means of software plus a necessary general hardware platform. Based on this understanding, the technical solutions of the present invention can be embodied in the form of software products in essence or the parts that make contributions to the prior art. The computer software products can be stored in storage media, such as ROM/RAM, magnetic disks, etc. , CD, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in various embodiments or some parts of the embodiments of the present invention.

The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited to this. Substitutions should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims (6)

1. a kind of method for evaluating reliability of electric railway traction power supply system characterized by comprising

The data information for acquiring electric railway traction power supply system, is recorded in database for the data information；

Electrical equipment each in electric railway traction power supply system and traction power supply unit are made according to the data information Classification analysis is carried out with the type of state, fault category and facility；

The electric railway traction power supply system is carried out using reliability evaluation index according to the result of the classification analysis Evaluation, blends with management information system or the existing statistical indicator of safety production dispatching command system, establishes electric railway and lead The reliability evaluation technical system for drawing power supply system, using the evaluation index in the reliability evaluation technical system to electrification The reliability of railway traction power supply system is evaluated.

2. the method according to claim 1, wherein the data of the acquisition electric railway traction power supply system The data information is recorded in database by information, comprising: acquires the basis letter of the electric railway traction power supply system Breath acquires the initial information of each electrical equipment and traction power supply unit in the electric railway traction power supply system, peace The security information and fault message of full information, fault message, equipment transition information and tractive power supply system；

Acquire each electrical equipment and traction power supply unit use state in the electric railway traction power supply system, comprising: The available mode of each electrical equipment and traction power supply unit, down state, the available mode be divided into operation and it is spare；Institute Stating down state includes planned outage and unplanned outage, and the planned outage includes that skylight is stopped transport, maintenance is stopped transport, transformation is applied Work is stopped transport and temporary downtimes；

It will be each in the basic information and electric railway traction power supply system of the electric railway traction power supply system of acquisition A electrical equipment and traction power supply unit use state are stored in database.

3. the method according to claim 1, wherein being powered according to the data information to electric railway traction The type of the use state of each electrical equipment and traction power supply unit, fault category and facility carries out classification point in system Analysis, specifically includes:

Classify to equipment use state in the electric railway traction power supply system, comprising: available mode and down state, The available mode is divided into operation, spare；It include planned outage and unplanned outage in the down state, the plan stops Fortune is stopped transport comprising skylight, maintenance is stopped transport, rebuilding construction is stopped transport, temporary downtimes；

Classification to equipment fault in the electric railway traction power supply system, comprising: ageing equipment, equipment faults itself, Train fault, natural cause, human factor, bird pest, foreign matter and other factors；

Classify to the type of facility in the electric railway traction power supply system, comprising: power supply unit, Traction networks power supply Unit and operating line.

4. the method according to claim 1, wherein utilizing reliability evaluation according to the result of the classification analysis Index evaluates the electric railway traction power supply system, with management information system or safety production dispatching command system Existing statistical indicator blends, and establishes the reliability evaluation technical system of electric railway traction power supply system, comprising:

It calculates reliability evaluation in the electric railway traction power supply system and shares index:

Availability coefficient AF indicates that objects of statistics can complete the probability of predetermined function in statistical time, i.e.,

In formula, available hours AH, that is, objects of statistics is in the hourage of available mode during statistics；

Operating factor SF indicates objects of statistics probability in running order in statistical time, i.e.,

In formula, hours run SH, that is, objects of statistics hourage in operating status during statistics, i.e.,

The spare hour RH (3) of hours run SH=available hours AH-

Planned outage FACTOR P OF indicates that objects of statistics is in the probability of planned outage state in statistical time, i.e.,

In formula, planned outage hour POH, that is, objects of statistics is stopped transport during statistics in skylight, maintenance is stopped transport, rebuilding construction The summation stopped transport with hourage under temporary downtimes state；

Unplanned outage coefficient UOF indicates that objects of statistics is in the probability of unplanned outage state in statistical time, i.e.,

In formula, unplanned outage hour UOH, that is, objects of statistics is in unavailable during statistics and is not planned outage Hourage under state；

Planned outage rate POR indicates number of the objects of statistics in statistical time under planned outage state, i.e.,

Unplanned outage rate UOR indicates number of the objects of statistics in statistical time under unplanned outage state, i.e.,

Average continuously available duration CSH indicates objects of statistics average duration under available mode every time in statistical time, I.e.

Exposure EXR indicates the percentage of objects of statistics the ratio between runing time and pot life in statistical time, reflects system The actual operating state of object is counted, i.e.,

Safety factor RF indicates that objects of statistics is in the probability of non-faulting state in statistical time, i.e.,

5. according to the method described in claim 4, it is characterized in that, the method also includes:

Calculate the peculiar index of Traction networks power supply unit reliability evaluation in the electric railway traction power supply system:

When calculating Traction networks power supply unit planned outage rate and unplanned outage rate two indices, when known power supply unit mileage When, it is calculated using formula (11)；When power supply unit mileage is not known, only knows traction power supply unit number, using formula (12) It is calculated；Traction networks power supply unit planned outage rate presses Traction networks power supply unit mileage calculation, i.e.,

It is calculated by Traction networks power supply unit number, i.e.,

6. according to the method described in claim 5, it is characterized in that, the method also includes:

Calculate the peculiar index of operating line Traction networks reliability evaluation in the electric railway traction power supply system:

Traction networks power supply unit mean failure rate power off time MT

Traction networks power supply unit mean failure rate frequency of power cut AT

Traction networks power supply unit fault outage average duration ADB

It is calculated according to electrical equipment each in the electric railway traction power supply system and traction power supply unit evaluation index same More indexs of class equipment and electric railway operating line Traction networks index, and then obtain facility many years statistical indicator, with management Information system or the existing statistical indicator of safety production dispatching command system blend, and establishing electric railway traction power supply system can By property assessment technique system, being powered using the evaluation index in the reliability evaluation technical system to electric railway traction is The reliability of system is evaluated.