CN108964024B - Backup power source automatic switching process recall analysis method for traction substation - Google Patents
Backup power source automatic switching process recall analysis method for traction substation Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
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Abstract
The invention discloses a recall analysis method for an automatic switching process of a standby power supply of a traction substation, which comprises the following steps: s1: carrying out automatic switching playback analysis preparation, namely selecting an automatic switching mode, a switch type, an automatic switching constant value automatic switching on and switching off in an automatic switching off item from an automatic switching constant value automatic switching setting item, and identifying different adopted operation modes through a system; s2: generating a switching value according to a fixed value and a fixed value range, if a fixed value ' inlet wire no-voltage automatic switching mode ' is set to be ' inverted straight column ', establishing the switching value ' inlet wire no-voltage automatic switching mode ' to be inverted straight column ', setting a value to be TRUE, establishing all the switching values in hard switching, and when the hard switching input is effective, setting the switching value to be TRUE, otherwise, setting the switching value to be FALSE; s3: drawing an action playback logic diagram, wherein the automatic switching process playback is realized by drawing a standby automatic switching diagram by using the switching value information created in the step S3, and graphically displaying the automatic switching information through the automatic switching diagram.
Description
Technical Field
The invention relates to an analysis method for an automatic switching process, in particular to a recall analysis method for an automatic switching process of a standby power supply of a traction substation.
Background
The traction substation is a special substation for electric traction, which converts the electric energy transmitted by a regional electric power system into electric energy suitable for electric traction according to different requirements of the electric traction on current and voltage, and then respectively transmits the electric energy to overhead contact networks erected above a railway line to supply power for electric locomotives or to power supply systems required by urban traffic such as underground railways and the like to supply power for electric vehicles or electric trains. Because the backup power automatic switching system involves a large number of switches and other electromechanical devices, the failure rate is high, and the backup power automatic switching system often fails. When the backup power automatic switching fails, an operator can often judge the backup power automatic switching only through experience, and the experience judgment can also cause larger deviation, so that the fault elimination of the backup power automatic switching failure is influenced. Therefore, a systematic and standardized diagnosis method is needed to accurately and quickly locate the fault when the backup power automatic switching fails and improve the fault removal efficiency.
Disclosure of Invention
The invention aims to solve the technical problems that the existing analysis method for the automatic switching process cannot enable a worker to intuitively know the whole automatic switching analysis process and is not beneficial to the regulation of the worker, and the invention aims to provide the analysis method for the automatic switching process of the standby power supply of the traction substation, and solve the problems.
The invention is realized by the following technical scheme:
a recall analysis method for an automatic switching process of a standby power supply of a traction substation comprises the following steps: s1: carrying out automatic switching playback analysis preparation, namely selecting an automatic switching mode in a device constant value automatic switching setting project, wherein the automatic switching mode comprises an inlet wire voltage loss automatic switching mode and a main transformer fault automatic switching mode; setting a self-switching mode, simultaneously carrying out switch switching on and off of a device constant-value self-switching switch-on and self-switching switch-off, setting a device hard switching-on signal, and identifying different adopted operation modes through a system; s2: generating a switching value according to the fixed value and the fixed value range, and generating an intermediate switching value state; s3: drawing an action playback logic diagram, wherein the automatic switching process playback needs to draw a spare automatic switching action diagram by using the switching value information created in the step S2, and the automatic switching information is graphically displayed through the automatic switching action diagram; s4: checking the action playback logic, starting the recording of each switching value in the action diagram by the automatic switching device during the automatic switching action until the whole spare power automatic switching process is finished, and generating a recording file in the device. The method is characterized in that the backup power automatic switching process playback is realized by drawing a backup power automatic switching diagram by utilizing created switching value information, the link belongs to a part of visual programming, a worker can conveniently monitor the backup power automatic switching analysis process through the visual programming, the backup power automatic switching diagram can intervene at any time, and a backup power automatic switching program is compiled together with a backup power automatic switching action logic diagram. The method is used for drawing 8 kinds of action diagrams of inlet wire voltage loss and main transformer faults of a typical electrified railway substation under the operation modes 1-4, and workers can obtain different action diagrams through different operation modes.
Further, the operation manner in step S1 includes:
operation mode 1: the incoming line of the side is electrified, the main transformer of the side operates, and the incoming line of the opposite side and the main transformer of the opposite side are standby;
operation mode 2: the incoming line of the side is electrified, the main transformer of the side operates, and the incoming line of the side and the main transformer of the side are standby;
operation mode 3: the incoming line of the opposite side is electrified, the main transformer of the side operates, and the incoming line of the side and the main transformer of the opposite side are standby;
operation mode 4: the incoming line of the opposite side is electrified, the main transformer of the opposite side operates, and the incoming line of the side and the main transformer of the side are standby;
operation mode 5: an inefficient mode of operation.
Further, a playback logic diagram is drawn according to the step S3, and the drawing steps are as follows:
s31: a working area is finally created in a visualization program of the spare power automatic switching, the action playback attribute of the working area is set to be TRUE, and the working area is named as an operation mode 1 automatic switching playback;
s32: the method comprises the following steps of drawing a self-throwing start as a first starting state on the leftmost side of a working area, and then drawing a low-voltage side beta-phase circuit breaker open, a low-voltage side alpha-phase circuit breaker open, a track-changing backflow isolating switch open, a main transformer neutral point isolating switch open, a high-voltage side circuit breaker open, an incoming line isolating switch open, a self-throwing connection open, an alpha-phase capacitor closed position open, a beta-phase capacitor closed position open, a high-voltage side circuit breaker close, a main transformer neutral point isolating switch close, a track-changing backflow isolating switch close, a low-voltage side alpha-phase circuit breaker close, a low-voltage side beta-phase circuit breaker close, a self-throwing connection open and a self-throwing success in sequence, wherein each state is connected by an arrow connecting;
s33: and (5) drawing the conditions of voltage loss and main transformer faults of other operation modes according to the method of S32.
Further, when the automatic switching input of the hard opening incoming line is effective or the main transformer automatic switching input is effective, the operation mode is effective and the last automatic switching is reset, the automatic switching ready condition is met.
Further, in step S2, when the fixed value "inlet line no-voltage self-throw mode" is set to "inverted column", a switching value "inlet line no-voltage self-throw mode" is set to inverted column ", and the value is TRUE; when the self-switching and closing fixed value '2 QF low-voltage side alpha-phase circuit breaker' is set as the input, a switching value '2 QF low-voltage side alpha-phase circuit breaker closing input' is created, and the value is TRUE.
The switch value is TRUE when the hard-on input is active and FALSE otherwise. Dual position hard for circuit breaker, isolation switch
And opening, namely creating switching quantities such as '1 QF high-voltage side circuit breaker closed position' and '1 QF high-voltage side circuit breaker open position', wherein the values of the switching quantities are determined by input open and close opening and closing values.
The method has the advantages that the backup power automatic switching device can start each switching value wave recording in the action graph when the backup power automatic switching device automatically switches, and the wave recording file is generated in the device until the whole backup power automatic switching process is finished. And (3) opening a waveform file by adopting a waveform analysis tool WaveAnalyze matched with the platform, checking and displaying a logic diagram, and checking the self-throwing action process of the device. The time axis can be dragged manually or moved automatically, the triggered state can be changed into red, the non-triggered state can be changed into grey in the dragging process, and the detailed flow of the backup power automatic switching is displayed in detail.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. according to the method for analyzing the recall of the automatic switching process of the standby power supply of the traction substation, the whole automatic switching process is subjected to imaging analysis processing, and the whole process can be displayed more visually.
2. According to the backup power source automatic switching process recall analysis method for the traction substation, the backup power source automatic switching device can start each switching value wave recording in the action diagram during the automatic switching action until the whole backup power source automatic switching process is finished, and a wave recording file is generated in the device, so that the backup power source automatic switching process recall analysis method is convenient to read at the later stage.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
fig. 1 is a main wiring diagram of a traction substation.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Examples
As shown in fig. 1, the condition required by the automatic switching playback analysis of the backup power source of the traction substation according to the automatic switching process recall analysis method of the invention is as follows:
the low-voltage side beta-phase circuit breaker comprises: a 1# main transformer low-voltage side beta-phase circuit breaker 5QF and a 2# main transformer low-voltage side beta-phase circuit breaker 6 QF;
the low-voltage side alpha-phase circuit breaker comprises: a 1# main transformer low-voltage side alpha-phase circuit breaker 3QF and a 2# main transformer low-voltage side alpha-phase circuit breaker 4 QF;
become rail backward flow isolator includes: a 1# rail-changing backflow isolating switch 9QS and a 2# rail-changing backflow isolating switch 10 QS;
the main neutral point isolator that becomes includes: a 1# main transformer neutral point isolating switch 7QS and a 2# main transformer neutral point isolating switch 8 QS;
the high-voltage side circuit breaker includes: a circuit breaker 1QF at the high-voltage side of the 1# main transformer and a circuit breaker 2QF at the high-voltage side of the 2# main transformer;
the inlet wire isolator includes: an isolating switch 1QS of the 1# incoming line and an isolating switch 2QS of the 2# incoming line;
the 1# main transformer is a main transformer 1B, and the 2# main transformer is a main transformer 2B;
wherein,
the 1# incoming line comprises an isolating switch 1QS, a circuit breaker 1QF and a main transformer 1B which are sequentially connected in series, wherein the high-voltage side of the main transformer 1B is connected with the circuit breaker 1QF, the low-voltage side of the main transformer 1B is connected with an alpha-phase circuit through a circuit breaker 3QF, and the low-voltage side of the main transformer 1B is connected with a beta-phase circuit through a circuit breaker 5 QF;
the 2# incoming line comprises an isolating switch 2QS, a circuit breaker 2QF and a main transformer 2B which are sequentially connected in series, wherein the high-voltage side of the main transformer 2B is connected with the circuit breaker 2QF, the low-voltage side of the main transformer 2B is connected with an alpha-phase circuit through a circuit breaker 4QF, the low-voltage side of the main transformer 2B is connected with a beta-phase circuit through a circuit breaker 6QF, and a connecting point between the isolating switch 1QS and the circuit breaker 1QF is communicated to a connecting point between the isolating switch 2QS and the circuit breaker 2QF through a cross-line isolating switch 3;
a main transformer neutral point isolating switch 7QS is connected with a neutral point of a main transformer 1B and then grounded, and a main transformer neutral point isolating switch 8QS is connected with a neutral point of a main transformer 2B and then grounded;
and a rail return isolating switch 9QS is connected with a rail return point of the main transformer 1B and then grounded, and a rail return isolating switch 10QS is connected with a rail return point of the main transformer 2B and then grounded.
The device constant value automatic switching setting items include: the main transformer fault automatic switching system comprises an incoming line voltage-loss automatic switching mode (inverted straight line or inverted cross), a main transformer fault automatic switching mode (inverted straight line or inverted cross), a low-voltage side switch type (circuit breaker or isolating switch), a 2QS and 4QS switch type (circuit breaker or isolating switch), a 3QS bridge isolated hot standby (input or output) and a 3QS bridge isolated (input or output) control.
The switch in the project of the device constant value automatic switching on and off is switched on and off, and the switch comprises:
a 1# main transformer low-voltage side beta-phase circuit breaker 5QF and a 2# main transformer low-voltage side beta-phase circuit breaker 6 QF;
a 1# main transformer low-voltage side alpha-phase circuit breaker 3QF and a 2# main transformer low-voltage side alpha-phase circuit breaker 4 QF;
a 1# rail-changing backflow isolating switch 9QS and a 2# rail-changing backflow isolating switch 10 QS;
a 1# main transformer neutral point isolating switch 7QS and a 2# main transformer neutral point isolating switch 8 QS;
a circuit breaker 1QF at the high-voltage side of the 1# main transformer and a circuit breaker 2QF at the high-voltage side of the 2# main transformer;
an isolating switch 1QS of the 1# incoming line and an isolating switch 2QS of the 2# incoming line;
a cross line disconnecting switch 3 QS;
device hard-on signal: the main transformer automatic switching input, the incoming line automatic switching input, the fault of the main transformer at the opposite side, the voltage loss at the opposite side, the fault of the main transformer at the local side and the double-point hard switching input of all the switch positions in the attached figure 1.
Identifying the system operation mode, and obtaining the system operation mode according to the table 1 by simultaneously meeting the conditions 1 and 2, wherein the operation modes have the following meanings:
operation mode 1: the incoming line of the side is electrified, the main transformer of the side operates, and the incoming line of the opposite side and the main transformer of the opposite side are standby.
Operation mode 2: the incoming line of the side is electrified, the main transformer of the side runs, and the incoming line of the side and the main transformer of the side are standby.
Operation mode 3: the incoming line of the opposite side is electrified, the main transformer of the side operates, and the incoming line of the side and the main transformer of the opposite side are standby.
Operation mode 4: the contralateral incoming line is electrified, the contralateral main transformer operates, and the contralateral incoming line and the contralateral main transformer are standby.
Operation mode 5: an inefficient mode of operation. A self-commissioning ready condition. When the hard-open incoming line automatic switching input is effective or the main transformer automatic switching input is effective, the operation mode is effective and the last automatic switching is reset, the automatic switching ready condition is met.
The operation determination manner is as shown in table 1 below.
Table 1 operating mode determination
Generating an intermediate switching value state: and generating a switching value according to the fixed value and the fixed value range, and if the fixed value ' inlet wire no-voltage automatic switching mode ' is set to be ' inverted straight row ', establishing the switching value ' inlet wire no-voltage automatic switching mode ' to be inverted straight row ', and taking the value as TRUE. And if the self-switching closing constant value 'low-voltage side alpha-phase circuit breaker' is set to be the switching-in, a switching value 'low-voltage side alpha-phase circuit breaker closing switching-in input' is established, and the value is TRUE.
A switching value is created for all of the hard-on inputs described above, with the switching value TRUE when the hard-on input is active and FALSE otherwise. For the double-position hard opening of the circuit breaker and the isolating switch, switching values such as 'closing position of the high-voltage side circuit breaker' and 'opening position of the high-voltage side circuit breaker' are created, and the values of the switching values are determined by inputting opening and closing values.
Drawing an action playback logic diagram: the backup power automatic switching process playback is realized by drawing a backup power automatic switching diagram by using the switching value information created in section 2, wherein the drawing belongs to a part of visual programming, and the backup power automatic switching diagram is compiled together with a backup power automatic switching program.
For typical electrified railway transformerPower station drawing-needed system under operation modes 1-4Into Line voltage loss and main transformer faultA total of 8 action diagrams, in operation mode 1The side inlet wire loses voltageFor example, the steps are: and finally creating a working area in the visualization program of the backup automatic switching, wherein the action playback attribute of the working area is set as TRUE, and the working area is named as an operation mode 1 automatic switching playback. The method comprises the following steps of drawing a self-throwing start as a first starting state on the leftmost side of a working area, and then drawing a low-voltage side beta-phase circuit breaker open, a low-voltage side alpha-phase circuit breaker open, a track-changing backflow isolating switch open, a main transformer neutral point isolating switch open, a high-voltage side circuit breaker open, an incoming line isolating switch open, a self-throwing connection open, an alpha-phase capacitor closed position open, a beta-phase capacitor closed position open, a high-voltage side circuit breaker close, a main transformer neutral point isolating switch close, a track-changing backflow isolating switch close, a low-voltage side alpha-phase circuit breaker close, a low-voltage side beta-phase circuit breaker close, a self-throwing connection open and a self-throwing success in sequence, wherein each state is connected by an arrow connecting;
view action playback logic: the backup power automatic switching device can start each switching value wave recording in the action diagram during the automatic switching action until the whole backup power automatic switching process is finished, and a wave recording file is generated in the device. And (3) opening a waveform file by adopting a waveform analysis tool WaveAnalyze matched with the platform, checking and displaying a logic diagram, and checking the self-throwing action process of the device. The time axis can be dragged manually or moved automatically, the triggered state can be changed into red, the non-triggered state can be changed into grey in the dragging process, and the detailed flow of the backup power automatic switching is displayed in detail.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (2)
1. A recall analysis method for an automatic switching process of a standby power supply of a traction substation is characterized by comprising the following steps:
s1: carrying out automatic switching playback analysis preparation, namely selecting an automatic switching mode in a device constant value automatic switching setting project, wherein the automatic switching mode comprises an inlet wire voltage loss automatic switching mode and a main transformer fault automatic switching mode; setting a self-switching mode, simultaneously carrying out switch switching on and off of a device constant-value self-switching switch-on and self-switching switch-off, setting a device hard switching-on signal, and identifying different adopted operation modes through a system;
s2: generating a switching value according to the fixed value and the fixed value range, and generating an intermediate switching value state;
s3: drawing an action playback logic diagram, wherein the automatic switching process playback needs to draw a spare automatic switching action diagram by using the switching value information created in the step S2, and the automatic switching information is graphically displayed through the automatic switching action diagram;
s4: checking the action playback logic, starting the recording of each switching value in the action diagram by the automatic switching device during the automatic switching action until the whole spare power automatic switching process is finished, and generating a recording file in the device;
the operation mode in step S1 includes:
operation mode 1: the incoming line of the side is electrified, the main transformer of the side operates, and the incoming line of the opposite side and the main transformer of the opposite side are standby;
operation mode 2: the incoming line of the side is electrified, the main transformer of the side operates, and the incoming line of the side and the main transformer of the side are standby;
operation mode 3: the incoming line of the opposite side is electrified, the main transformer of the side operates, and the incoming line of the side and the main transformer of the opposite side are standby;
operation mode 4: the incoming line of the opposite side is electrified, the main transformer of the opposite side operates, and the incoming line of the side and the main transformer of the side are standby;
operation mode 5: an invalid mode of operation;
drawing a playback logic diagram according to the step S3, wherein the drawing steps are as follows:
s31: a working area is finally created in a visualization program of the spare power automatic switching, the action playback attribute of the working area is set to be TRUE, and the working area is named as an operation mode 1 automatic switching playback;
s32: the method comprises the following steps of drawing a self-throwing start as a first starting state on the leftmost side of a working area, and then drawing a low-voltage side beta-phase circuit breaker open, a low-voltage side alpha-phase circuit breaker open, a track-changing backflow isolating switch open, a main transformer neutral point isolating switch open, a high-voltage side circuit breaker open, an incoming line isolating switch open, a self-throwing connection open, an alpha-phase capacitor closed position open, a beta-phase capacitor closed position open, a high-voltage side circuit breaker close, a main transformer neutral point isolating switch close, a track-changing backflow isolating switch close, a low-voltage side alpha-phase circuit breaker close, a low-voltage side beta-phase circuit breaker close, a self-throwing connection open and a self-throwing success in sequence, wherein each state is connected by an arrow connecting;
s33: drawing the conditions of voltage loss and main transformer faults of other operation modes according to the method of S32;
the low-voltage side beta-phase circuit breaker comprises: a 1# main transformer low-voltage side beta-phase circuit breaker 5QF and a 2# main transformer low-voltage side beta-phase circuit breaker 6 QF;
the low-voltage side alpha-phase circuit breaker comprises: a 1# main transformer low-voltage side alpha-phase circuit breaker 3QF and a 2# main transformer low-voltage side alpha-phase circuit breaker 4 QF;
become rail backward flow isolator includes: a 1# rail-changing backflow isolating switch 9QS and a 2# rail-changing backflow isolating switch 10 QS;
the main neutral point isolator that becomes includes: a 1# main transformer neutral point isolating switch 7QS and a 2# main transformer neutral point isolating switch 8 QS;
the high-voltage side circuit breaker includes: a circuit breaker 1QF at the high-voltage side of the 1# main transformer and a circuit breaker 2QF at the high-voltage side of the 2# main transformer;
the inlet wire isolator includes: an isolating switch 1QS of the 1# incoming line and an isolating switch 2QS of the 2# incoming line;
the 1# main transformer is a main transformer 1B, and the 2# main transformer is a main transformer 2B;
wherein,
the 1# incoming line comprises an isolating switch 1QS, a circuit breaker 1QF and a main transformer 1B which are sequentially connected in series, wherein the high-voltage side of the main transformer 1B is connected with the circuit breaker 1QF, the low-voltage side of the main transformer 1B is connected with an alpha-phase circuit through a circuit breaker 3QF, and the low-voltage side of the main transformer 1B is connected with a beta-phase circuit through a circuit breaker 5 QF;
the 2# incoming line comprises an isolating switch 2QS, a circuit breaker 2QF and a main transformer 2B which are sequentially connected in series, wherein the high-voltage side of the main transformer 2B is connected with the circuit breaker 2QF, the low-voltage side of the main transformer 2B is connected with an alpha-phase circuit through a circuit breaker 4QF, the low-voltage side of the main transformer 2B is connected with a beta-phase circuit through a circuit breaker 6QF, and a connecting point between the isolating switch 1QS and the circuit breaker 1QF is connected to a connecting point between the isolating switch 2QS and the circuit breaker 2QF through a cross-line isolating switch 3;
a 1# main transformer neutral point isolating switch 7QS is connected with a neutral point of a main transformer 1B and then grounded, and a 2# main transformer neutral point isolating switch 8QS is connected with a neutral point of a main transformer 2B and then grounded;
and a 1# variable rail backflow isolating switch 9QS is connected with a variable rail backflow point of the main transformer 1B and then grounded, and a 2# variable rail backflow isolating switch 10QS is connected with a variable rail backflow point of the main transformer 2B and then grounded.
2. The method for self-commissioning process recall analysis of a traction substation standby power supply according to claim 1,
when the hard-open incoming line automatic switching input is effective or the main transformer automatic switching input is effective, the operation mode is effective and the last automatic switching is reset, the automatic switching ready condition is met.
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| JP2009065775A (en) * | 2007-09-06 | 2009-03-26 | Tokyo Electric Power Co Inc:The | Method of preraring procedure for confirming switch operation |
| CN102496930A (en) * | 2011-12-28 | 2012-06-13 | 浙江省电力公司 | Remote inversion method of internal action logic of protection device |
| CN103853807A (en) * | 2013-11-26 | 2014-06-11 | 许继电气股份有限公司 | Visual analysis method of power faults |
| CN204118855U (en) * | 2014-06-05 | 2015-01-21 | 成都交大运达电气有限公司 | High-speed overload railway digital traction substation main transformer measure and control device |
| CN104360181A (en) * | 2014-10-08 | 2015-02-18 | 成都交大许继电气有限责任公司 | Method for quick fault diagnosis when spare power automatic switching of traction substation fails |
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