CN111325477B - Traction power supply system maintenance scheme determination method for reducing maintenance power failure time - Google Patents
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Abstract
The invention discloses a method for determining a maintenance scheme of a traction power supply system, which can reduce the maintenance power failure time. The method comprises the following steps: a: input data required for maintenance protocol determination is acquired. B: and determining the value of the reliability maintenance margin delta R of the traction power supply equipment. C: and solving the maintenance period, the equipment required to be maintained and the maintenance outage time. D: changing the value of the reliability maintenance margin delta R of the traction power supply equipment, circulating the step C, and selecting the power failure time TfThe reliability maintenance margin corresponding to the minimum value of (1), the maintenance period and the equipment required to be maintained in each maintenance period are taken as the final output maintenance scheme. The invention can reduce the maintenance power-off time of the traction power supply system and provides a better basis for railway operation and maintenance units to formulate the maintenance scheme of the traction power supply system.
Description
Technical Field
The invention relates to a method for determining a maintenance scheme of a traction power supply system, in particular to a method for determining a maintenance scheme of a traction power supply system, which reduces the maintenance power failure time.
Background
The railway traction power supply system in China adopts a maintenance mode combining regular scheduled maintenance, fault first-aid repair and daily inspection. The maintenance mode mainly based on the regular scheduled maintenance can ensure the reliability requirement of the traction power supply equipment to a certain extent, but has the problems of frequent maintenance, high cost and low efficiency. Because the maintenance of the traction power supply equipment depends on manual operation, the whole network or the area is required to be matched with power failure. Therefore, frequent maintenance increases the power failure time of the traction power supply system, which may not only affect the operation planning of the existing train, but also may result in that all-weather line driving cannot be realized, and the transportation capacity of the railway line is reduced.
In the currently implemented maintenance mode of the traction power supply system, maintenance of traction power supply equipment is often performed independently, and common maintenance does not exist for each equipment. Therefore, when a certain device is maintained, the traction power supply system needs to be powered off, so that the power failure of the traction power supply system is frequent, and the normal operation of the system is influenced.
Disclosure of Invention
The invention provides a method for determining a maintenance scheme of a traction power supply system, which aims to fully utilize the power failure time of the traction power supply system, realize the common maintenance among equipment, reduce the maintenance power failure time of the traction power supply system and provide decision support for determining the maintenance scheme of the traction power supply system.
The technical scheme adopted by the invention is as follows: a method for determining a maintenance scheme of a traction power supply system for reducing maintenance outage time comprises the following steps:
A. data acquisition
A1, counting n traction power supply devices S1,S2,…,SnTime of failure of the kth device SkTime of operation TkKth device SkSpecified service life TCkKth device SkThe running time T from the last maintenance end time to the current time0kKth device SkMaintenance time TW required for 1 maintenancekKth device SkRequired for operational reliability Rk(ii) a Wherein k is 1,2, …, n;
a2, using the Weibull distribution function as shown in formula (1) to describe the reliability of each device,
r in the formula (1)k(t) is a unit SkReliability after an operating time t, etak、mkScale parameters and shapes, respectively, of Weibull distribution functionsA shape parameter; etak、mkAll according to statistical equipment SkThe historical fault time is calculated by adopting a least square method; exp represents an exponential function with a natural constant as the base;
a3, device SkRequired for operational reliability RkSubstituting the left side of the formula (1) to calculate the device SkMaintenance interval of
Then computing device SkRemaining service time TRE from next maintenancek＝TPk-T0k。
B. Defining reliability maintenance margin Delta R of traction power supply equipment to be 0.005
C. Maintenance period, required maintenance equipment and solution of maintenance blackout time
C1, computing device SkMaintenance interval of
Definition device SkMinimum maintenance period TO ofk＝TPk-ΔTk(ii) a Defining system power failure time Tf＝0；
C2, comparing the residual using time of n devices, and marking the device with the shortest residual using time as the a < th > device0An apparatus Sa0(ii) a Judging whether or not the product is a0Whether or not other devices than the individual device satisfy TOk<TPa0Where k is 1,2, …, n, but k ≠ a0(ii) a If not (k ═ a)0) The maintenance is only to the a-th0The equipment is maintained with a maintenance period of TREa0A1 th0Maintenance time TW of individual devicesa0System power off time T marked as this maintenancefA first step of; at the same time, the first step0The running time of each device is updated to Ta0＝Ta0+TREa0And will be a0The remaining usage time of each device is updated to TREa0＝TPa0(ii) a Then entering the C4 operation; if (k ≠ a) is 1,2, …, n0) Then go to step C3;
c3, Definitions all satisfy TOk<TPa0Is { S }a1,Sa2…, the repair pair a0An apparatus Sa0And device { Sa1,Sa2… } are simultaneously repaired with a repair cycle TREa0(ii) a Comparison device Sa0And device { Sa1,Sa2… maintenance time TW required for 1 maintenancea0、TWa1、TWa2…, defining a maximum value TW thereinmSystem power off time T as this maintenancefA first step of; at the same time, the device Sa0And device { Sa1,Sa2… } are updated to Tj＝Tj+TREa0And the device Sa0And device { Sa1,Sa2… } is updated to TREj＝TPjWherein j is a0,a1,a2,…；
C4, updating system power failure time Tf＝Tf+Tf*；
C5, judging the operation time T of the kth equipmentkWhether the specified service life TC is reachedk. If not, returning to the step C2; if yes, ending the circulation;
c6, recording and saving T solved this timefAnd solving all maintenance periods in the cyclic process and the equipment required to be maintained in each maintenance period.
D. Updating delta R to delta R +0.001, and judging whether the delta R is less than or equal to 0.1; if yes, returning to the step C for processing; if not, not returning to the step C, and selecting all the stored TfThe reliability maintenance margin corresponding to the minimum value of (1), the maintenance period and the equipment required to be maintained in each maintenance period are taken as the final output maintenance scheme.
Compared with the prior art, the invention has the beneficial effects that:
the invention fully utilizes the power failure time of the traction power supply system, realizes the common maintenance among equipment compared with the traditional regular maintenance mode, can reduce the maintenance power failure time of the traction power supply system, and provides better basis for railway operation and maintenance units to formulate the maintenance scheme of the traction power supply system.
Detailed Description
The embodiments of the present invention are described below with specific examples, and those skilled in the art can easily understand the advantages of the present invention from the disclosure of the present specification. The invention is capable of other and different embodiments and its several details are capable of modification in various other respects, all without departing from the spirit and scope of the present invention.
The present invention is further described below with reference to specific embodiments. A method for determining a maintenance scheme of a traction power supply system for reducing maintenance power failure time comprises the following specific steps:
A. data acquisition
A1, counting n traction power supply devices S1,S2,…,SnTime of failure of the kth device SkTime of operation TkKth device SkSpecified service life TCkKth device SkThe running time T from the last maintenance end time to the current time0kKth device SkMaintenance time TW required for 1 maintenancekKth device SkRequired for operational reliability Rk(ii) a Wherein k is 1,2, …, n;
a2, using the Weibull distribution function as shown in formula (2) to describe the reliability of each device,
r in the formula (1)k(t) is a unit SkReliability after an operating time t, etak、mkRespectively, scale parameters and shape parameters of a Weibull distribution function; etak、mkAll according to statistical equipment SkThe historical fault time is calculated by adopting a least square method; exp represents an exponential function with a natural constant as the base;
a3, mixing equipmentSkRequired for operational reliability RkSubstituting the left side of the formula (1) to calculate the device SkMaintenance interval of
Then computing device SkRemaining service time TRE from next maintenancek＝TPk-T0k。
B. Defining reliability maintenance margin Delta R of traction power supply equipment to be 0.005
C. Maintenance period, required maintenance equipment and solution of maintenance blackout time
C1, computing device SkMaintenance interval of
Definition device SkMinimum maintenance period TO ofk＝TPk-ΔTk(ii) a Defining system power failure time Tf＝0；
C2, comparing the residual using time of n devices, and marking the device with the shortest residual using time as the a < th > device0An apparatus Sa0(ii) a Judging whether or not the product is a0Whether or not other devices than the individual device satisfy TOk<TPa0Where k is 1,2, …, n, but k ≠ a0(ii) a If not (k ═ a)0) The maintenance is only to the a-th0The equipment is maintained with a maintenance period of TREa0A1 th0Maintenance time TW of individual devicesa0System power off time T marked as this maintenancefA first step of; at the same time, the first step0The running time of each device is updated to Ta0＝Ta0+TREa0And will be a0The remaining usage time of each device is updated to TREa0＝TPa0(ii) a Then entering the C4 operation; if (k ≠ a) is 1,2, …, n0) Then go to step C3;
c3, Definitions all satisfy TOk<TPa0Is { S }a1,Sa2…, the repair pair a0An apparatus Sa0And device { Sa1,Sa2,…Maintenance is carried out simultaneously, and the maintenance period is TREa0(ii) a Comparison device Sa0And device { Sa1,Sa2… maintenance time TW required for 1 maintenancea0、TWa1、TWa2…, defining a maximum value TW thereinmSystem power off time T as this maintenancefA first step of; at the same time, the device Sa0And device { Sa1,Sa2… } are updated to Tj＝Tj+TREa0And the device Sa0And device { Sa1,Sa2… } is updated to TREj＝TPjWherein j is a0,a1,a2,…；
C4, updating system power failure time Tf＝Tf+Tf*；
C5, judging the operation time T of the kth equipmentkWhether the specified service life TC is reachedk. If not, returning to the step C2; if yes, ending the circulation;
c6, recording and saving T solved this timefAnd solving all maintenance periods in the cyclic process and the equipment required to be maintained in each maintenance period.
D. Updating delta R to delta R +0.001, and judging whether the delta R is less than or equal to 0.1; if yes, returning to the step C for processing; if not, not returning to the step C, and selecting all the stored TfThe reliability maintenance margin corresponding to the minimum value of (1), the maintenance period and the equipment required to be maintained in each maintenance period are taken as the final output maintenance scheme.
In conclusion, the method for determining the maintenance scheme of the traction power supply system for reducing the maintenance power failure time can realize the common maintenance of the equipment under the condition of ensuring the reliability requirement of the traction power supply equipment, can reduce the maintenance power failure time of the traction power supply system, and provides a better basis for railway operation and maintenance units to formulate the maintenance scheme of the traction power supply system.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Therefore, the scope of the invention should be determined from the following claims.
Claims (1)
1. A method for determining a maintenance scheme of a traction power supply system for reducing maintenance outage time is characterized by comprising the following steps:
A. data acquisition
A1, counting n traction power supply devices S1,S2,…,SnTime of failure of the kth device SkTime of operation TkKth device SkSpecified service life TCkKth device SkThe running time T from the last maintenance end time to the current time0kKth device SkMaintenance time TW required for 1 maintenancekKth device SkRequired for operational reliability Rk(ii) a Wherein k is 1,2, …, n;
a2, using the Weibull distribution function as shown in formula (1) to describe the reliability of each device,
r in the formula (1)k(t) is a unit SkReliability after an operating time t, etak、mkRespectively, scale parameters and shape parameters of a Weibull distribution function; etak、mkAll according to statistical equipment SkThe historical fault time is calculated by adopting a least square method; exp represents an exponential function with a natural constant as the base;
a3, device SkRequired for operational reliability RkSubstituting the left side of the formula (1) to calculate the device SkMaintenance interval of
Then computing device SkLeft over from next maintenanceUsing time TREk＝TPk-T0k；
B. Defining reliability maintenance margin Delta R of traction power supply equipment to be 0.005
C. Maintenance period, required maintenance equipment and solution of maintenance blackout time
C1, computing device SkMaintenance interval of
Definition device SkMinimum maintenance period TO ofk＝TPk-ΔTk(ii) a Defining system power failure time Tf＝0；
C2, comparing the residual using time of n devices, and marking the device with the shortest residual using time as the a < th > device0An apparatus Sa0(ii) a Judging whether or not the product is a0Whether or not other devices than the individual device satisfy TOk<TPa0Where k is 1,2, …, n, but k ≠ a0(ii) a If not, i.e. k equals a0The maintenance is only to the a-th0The equipment is maintained with a maintenance period of TREa0A1 th0Maintenance time TW of individual devicesa0System power off time T marked as this maintenancefA first step of; at the same time, the first step0The running time of each device is updated to Ta0＝Ta0+TREa0And will be a0The remaining usage time of each device is updated to TREa0＝TPa0(ii) a Then entering the C4 operation; if so, i.e., k is 1,2, …, n, but k is not equal to a0Then go to step C3;
c3, Definitions all satisfy TOk<TPa0Is { S }a1,Sa2…, the repair pair a0An apparatus Sa0And device { Sa1,Sa2… } are simultaneously repaired with a repair cycle TREa0(ii) a Comparison device Sa0And device { Sa1,Sa2… maintenance time TW required for 1 maintenancea0、TWa1、TWa2…, defining a maximum value TW thereinmSystem power off time T as this maintenancefA first step of; at the same time, the device Sa0And device { Sa1,Sa2… } are updated to Tj＝Tj+TREa0And the device Sa0And device { Sa1,Sa2… } is updated to TREj＝TPjWherein j is a0,a1,a2,…；
C4, updating system power failure time Tf＝Tf+Tf*；
C5, judging the operation time T of the kth equipmentkWhether the specified service life TC is reachedkIf not, returning to the step C2; if yes, ending the circulation;
c6, recording and saving T solved this timefSolving all maintenance periods in the cyclic process and equipment required to be maintained in each maintenance period;
D. updating delta R to delta R +0.001, and judging whether the delta R is less than or equal to 0.1; if yes, returning to the step C for processing; if not, not returning to the step C, and selecting all the stored TfThe reliability maintenance margin corresponding to the minimum value of (1), the maintenance period and the equipment required to be maintained in each maintenance period are taken as the final output maintenance scheme.
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