CN113609628B - Site selection method, device and equipment for subway transformer substation and readable storage medium - Google Patents
Site selection method, device and equipment for subway transformer substation and readable storage medium Download PDFInfo
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Abstract
The invention discloses a method for selecting a site of a subway transformer substation, which comprises the steps of obtaining actual measurement parameters to establish a simulation model, respectively simulating on the simulation model by considering different influence factors to obtain a relation graph of each influence factor and direct current bias voltage, establishing an equivalent direct current resistance model of a direct current bias loop comprising the subway transformer substation, a power transmission line and a local transformer substation according to the test parameters to obtain a total direct current bias resistance of a system, obtaining the maximum allowable direct current bias voltage according to the maximum allowable bias current and the total direct current bias resistance, and further determining the position of the subway transformer substation according to the relation graph of each influence factor and the direct current bias voltage and the maximum allowable direct current bias voltage, and judging the direct current bias voltage of different subway transformer substation positions so as to provide a reliable scheme for selecting the site of the subway transformer substation. Correspondingly, the invention also provides a site selection device, equipment and medium of the subway transformer substation.
Description
Technical Field
The invention relates to the technical field of grounding safety of power systems, in particular to a method, a device and equipment for selecting addresses of subway substations and a computer readable storage medium.
Background
Along with the rapid development of economy, subways play an important role in the daily life of people. At present, the proportion of subways in urban public transportation in some large cities reaches 40%, the proportion of subways in later planning construction reaches 72%, the proportion of subways in light rails reaches 10%, and the proportion of public transportation reaches. With the increase of subway operation, more and more peripheral power equipment fails, wherein the DC magnetic bias of the transformer is particularly prominent. The subway traction power supply mainly supplies power grid voltage to the contact net through the traction substation, and no grounding system exists in the subway main substation or the traction substation.
The applicant finds that, because the grounding system does not exist in the subway transformer substation, if the direct current magnetic bias condition of the subway transformer substation is analyzed by utilizing the stray current theory, the rule of the subway transformer substation affected by the direct current magnetic bias cannot be reflected well, and the position of the subway transformer substation cannot be determined accurately.
Disclosure of Invention
The embodiment of the invention provides a method, a device, equipment and a computer readable storage medium for selecting addresses of a subway transformer substation, which can solve the technical problem that the prior art cannot accurately analyze the source of direct-current magnetic bias current of the subway transformer substation, so that the subway transformer substation addresses are unreliable.
The site selection method for the subway transformer substation provided by the embodiment of the invention comprises the following steps:
according to the acquired actual measurement parameters of related power equipment for building the subway transformer substation and the power transmission line, building a simulation model comprising the subway, the transformer substation and the power transmission line;
considering different influence factors, respectively simulating the simulation model for each influence factor to obtain a direct current bias voltage change result under each influence factor, and obtaining a relation graph of each influence factor and the direct current bias voltage according to the direct current bias voltage change result under each influence factor;
establishing an equivalent direct current resistance model of a direct current magnetic bias loop comprising a subway transformer substation, a power transmission line and a local transformer substation according to the actual measurement parameters, and obtaining the total direct current magnetic bias resistance of the system according to the equivalent direct current resistance model;
obtaining the maximum allowable direct current bias voltage of the subway transformer substation according to the maximum allowable magnetic bias current of the transformer substation and the total direct current magnetic bias resistance;
and determining the position of the subway transformer substation according to the relation graph of each influence factor and the direct current bias voltage and the maximum allowable direct current bias voltage.
Preferably, the measured parameters include subway tunnel structure information, subway peripheral soil resistivity, layering conditions, traction substation position information and traction power supply current waveforms.
Preferably, the influence factors include a distance from a subway substation to a subway line and a parallel length of a power transmission line from the subway substation to a local substation and a subway, and the graph of the influence factors and the direct current bias voltage includes a graph of the distance and the direct current bias voltage and a graph of the parallel length and the direct current bias voltage.
Preferably, the determining the position of the subway substation according to the relation graph of each influencing factor and the dc bias voltage and the maximum allowable dc bias voltage specifically includes:
determining the minimum distance from the subway transformer station to the subway line according to the relation graph of the distance and the direct current bias voltage and the maximum allowable direct current bias voltage;
determining the longest parallel length of a power transmission line from a subway transformer station to a local transformer station and a subway according to the relation graph of the parallel length and the direct current bias voltage and the maximum allowable direct current bias voltage;
and determining a position area established by the subway transformer substation according to the minimum distance and the longest parallel length, wherein the position area is that the distance from the subway transformer substation to a subway line is larger than the minimum distance, and the parallel length of the power transmission line from the subway transformer substation to the local transformer substation and the subway is smaller than the longest parallel length.
The embodiment of the invention also provides a site selection device of the subway transformer substation, which comprises the following steps:
the simulation model building module is used for building a simulation model comprising a subway, a transformer substation and a power transmission line according to the acquired actual measurement parameters of the related power equipment for building the subway transformer substation and the power transmission line;
the relation graph acquisition module is used for considering different influence factors, respectively simulating the simulation model for each influence factor to obtain a direct-current bias voltage change result under each influence factor, and obtaining a relation graph of each influence factor and the direct-current bias voltage according to the direct-current bias voltage change result under each influence factor;
the total direct current magnetic bias resistance acquisition module is used for establishing an equivalent direct current resistance model of a direct current magnetic bias loop comprising a subway transformer substation, a power transmission line and a local transformer substation according to the actual measurement parameters, and obtaining the total direct current magnetic bias resistance of the system according to the equivalent direct current resistance model;
the maximum direct current bias voltage acquisition module is used for obtaining the maximum allowable direct current bias voltage of the subway transformer substation according to the maximum allowed magnetic bias current of the transformer substation and the total direct current magnetic bias resistance;
and the subway transformer station position determining module is used for determining the position of the subway transformer station according to the relation curve graph of each influence factor and the direct current bias voltage and the maximum allowable direct current bias voltage.
Preferably, the measured parameters include subway tunnel structure information, subway peripheral soil resistivity, layering conditions, traction substation position information and traction power supply current waveforms.
Preferably, the influence factors include a distance from a subway substation to a subway line and a parallel length of a power transmission line from the subway substation to a local substation and a subway, and the graph of the influence factors and the direct current bias voltage includes a graph of the distance and the direct current bias voltage and a graph of the parallel length and the direct current bias voltage.
Preferably, the subway substation determining module is specifically configured to:
determining the minimum distance from the subway transformer station to the subway line according to the relation graph of the distance and the direct current bias voltage and the maximum allowable direct current bias voltage;
determining the maximum parallel length of a power transmission line from a subway transformer station to a local transformer station and a subway according to the relation graph of the parallel length and the direct current bias voltage and the maximum allowable direct current bias voltage;
and determining a position area established by the subway transformer substation according to the minimum distance and the longest parallel length, wherein the position area is that the distance from the subway transformer substation to a subway line is larger than the minimum distance, and the parallel length of the power transmission line from the subway transformer substation to the local transformer substation and the subway is smaller than the longest parallel length.
The embodiment of the invention also provides a device for selecting the address of the subway transformer substation, which comprises a processor, a memory and a computer program stored in the memory and configured to be executed by the processor, wherein the method for selecting the address of the subway transformer substation is realized when the processor executes the computer program.
The embodiment of the invention also provides a computer readable storage medium, which comprises a stored computer program, wherein when the computer program runs, equipment where the computer readable storage medium is located is controlled to execute the method for selecting the address of the subway substation.
Compared with the prior art, the method, the device, the equipment and the storage medium for selecting the site of the subway transformer substation have the following beneficial effects:
according to the method for selecting the address of the subway transformer substation, the simulation model is built by obtaining the actual measurement parameters of related power equipment for building the subway transformer substation and the power transmission line, different influence factors are considered, simulation is conducted on the simulation model respectively aiming at each influence factor to obtain a relation graph of each influence factor and direct current bias voltage, an equivalent direct current resistance model of a direct current bias circuit comprising the subway transformer substation, the power transmission line and a local transformer substation is built according to the test parameters, the total direct current bias resistance of the system is obtained according to the equivalent direct current resistance model, the maximum allowable direct current bias voltage of the subway transformer substation is obtained according to the maximum magnetic bias current allowed to pass through the transformer of the transformer substation and the total direct current bias resistance, and then the position of the subway transformer substation is determined according to the relation graph of each influence factor and the direct current bias voltage and the maximum allowable direct current bias voltage. Correspondingly, the embodiment of the invention also provides a device and equipment for selecting the site of the subway transformer substation and a computer readable storage medium.
Drawings
Fig. 1 is a schematic flow chart of a method for selecting a site of a subway substation according to an embodiment of the present invention;
FIG. 2 is a graph of distance versus DC bias voltage provided by an embodiment of the present invention;
FIG. 3 is a graph of parallel length versus DC bias voltage provided by an embodiment of the present invention;
FIG. 4 is a diagram of various equivalent circuits involved in an equivalent DC resistance model provided by an embodiment of the present invention;
fig. 5 is a block diagram of a location device of a subway substation according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, a flow chart of a method for selecting a site of a subway substation according to an embodiment of the present invention is shown.
The site selection method of the subway transformer substation provided by the embodiment of the invention comprises the following steps of S11 to S15:
step S11, establishing a simulation model comprising the subway, the transformer substation and the transmission line according to the acquired actual measurement parameters of the related power equipment for establishing the subway transformer substation and the transmission line;
step S12, considering different influencing factors, respectively simulating the simulation model for each influencing factor to obtain a direct current bias voltage change result under each influencing factor, and obtaining a relation graph of each influencing factor and the direct current bias voltage according to the direct current bias voltage change result under each influencing factor;
step S13, establishing an equivalent direct current resistance model of a direct current magnetic bias loop comprising a subway transformer substation, a power transmission line and a local transformer substation according to the actual measurement parameters, and obtaining the total direct current magnetic bias resistance of the system according to the equivalent direct current resistance model;
step S14, obtaining the maximum allowable direct current bias voltage of the subway transformer substation according to the maximum allowable magnetic bias current of the transformer substation and the total direct current magnetic bias resistance;
and S15, determining the position of the subway transformer substation according to the relation graph of each influence factor and the direct current bias voltage and the maximum allowable direct current bias voltage.
In the embodiment of the present invention, the measured parameters in the step S11 include, but are not limited to, subway tunnel structure information, subway surrounding soil resistivity, layering condition, traction substation position information, and traction power supply current waveform.
Illustratively, in step S11, the simulation model is based on the Right-of-Way software package in CDEGS, including but not limited to subway lines, catenary models, reinforced concrete structures, drainage nets, overhead lines, lightning conductors, and the like.
In the embodiment of the present invention, step S12 "considers different influencing factors, and respectively simulates the simulation model for each influencing factor to obtain a dc bias voltage variation result under each influencing factor, and obtains a relationship graph of each influencing factor and a dc bias voltage according to the dc bias voltage variation result under each influencing factor, where the influencing factors include a distance from a subway transformer station to a subway line and a parallel length of a power transmission line from the subway transformer station to a local transformer station and a subway, and the relationship graph of the influencing factors and the dc bias voltage includes a relationship graph of the distance and the dc bias voltage and a relationship graph of the parallel length and the dc bias voltage.
In the embodiment of the invention, different influencing factors are considered, each influencing factor is respectively simulated, and specifically, when the simulation is performed on the simulation model aiming at the distance, other variables (parallel length and the like) are kept unchanged, the distance is selected as a variable on the simulation model, the influence of the distance on the bias voltage is researched, and then a relation graph of the distance and the direct current bias voltage is obtained.
Referring to fig. 2 and 3, fig. 2 is a graph of distance versus the dc bias voltage provided by the embodiment of the present invention, and fig. 3 is a graph of parallel length versus the dc bias voltage provided by the embodiment of the present invention, where it can be seen from fig. 2 and 3 that the magnitude of the bias voltage increases continuously with increasing parallel length and decreases with increasing distance.
In the embodiment of the present invention, the step S13 "establishes an equivalent dc resistance model including dc bias loops of a subway substation, a power transmission line, and a local substation" according to the measured parameters, where the equivalent dc resistance model includes dc equivalent circuits of each power device listed in fig. 4. In fig. 4, (a) is a high-voltage side dc equivalent model of the double-winding transformer, (b) is an autotransformer equivalent model diagram, (c) is a transmission line equivalent model diagram, (d) is a transformer substation grounding autotransformer and non-autotransformer dc model, (e) is a tower and lightning conductor dc model, and (f) is an equivalent dc resistance model established according to each power device.
Then, the total DC bias resistance of the system in the equivalent DC resistance model isWherein R is Tm And R is Tn Winding equivalent direct current resistances of the transformer m and the transformer n respectively, R gn And R is gm Equivalent grounding resistances R of the grounded neutral points of the transformer m and the transformer n respectively Lmn Is the equivalent direct current resistance of the transmission line between the transformer m and the transformer n, n is the return number of the transmission line.
In the embodiment of the present invention, the step S14 "obtains the maximum allowable dc bias voltage of the subway transformer substation" according to the maximum allowable bias current and the total dc bias resistance of the transformer substation, where the maximum allowable dc bias voltage is the product of the maximum bias current and the total dc bias resistance.
In one embodiment, the step S15 "determining the position of the subway substation according to the relationship graph between each influencing factor and the dc bias voltage and the maximum allowable dc bias voltage" specifically includes:
determining the minimum distance from the subway transformer station to the subway line according to the relation graph of the distance and the direct current bias voltage and the maximum allowable direct current bias voltage;
determining the longest parallel length of a power transmission line from a subway transformer station to a local transformer station and a subway according to the relation graph of the parallel length and the direct current bias voltage and the maximum allowable direct current bias voltage;
and determining a position area established by the subway transformer substation according to the minimum distance and the longest parallel length, wherein the position area is that the distance from the subway transformer substation to a subway line is larger than the minimum distance, and the parallel length of the power transmission line from the subway transformer substation to the local transformer substation and the subway is smaller than the longest parallel length.
In the embodiment of the invention, when the maximum allowable dc bias voltage is determined, the minimum distance and the maximum parallel length allowed by the subway substation can be determined by finding the corresponding distance and parallel length when the dc bias voltage is equal to the maximum allowable dc bias voltage in the graph of the relationship between the distance and the dc bias voltage and the graph of the relationship between the parallel length and the dc bias voltage, and the dc bias voltage increases with the increase of the distance and the parallel length in the graph of the relationship between the distance and the dc bias voltage.
According to the method for selecting the address of the subway transformer substation, the simulation model is built by obtaining the actual measurement parameters of related power equipment for building the subway transformer substation and the power transmission line, different influence factors are considered, simulation is conducted on the simulation model respectively aiming at each influence factor to obtain a relation graph of each influence factor and direct current bias voltage, an equivalent direct current resistance model of a direct current bias circuit comprising the subway transformer substation, the power transmission line and a local transformer substation is built according to the test parameters, the total direct current bias resistance of the system is obtained according to the equivalent direct current resistance model, the maximum allowable direct current bias voltage of the subway transformer substation is obtained according to the maximum magnetic bias current allowed to pass through the transformer of the transformer substation and the total direct current bias resistance, and then the position of the subway transformer substation is determined according to the relation graph of each influence factor and the direct current bias voltage and the maximum allowable direct current bias voltage.
Referring to fig. 5, fig. 5 is a block diagram of a location device of a subway substation according to an embodiment of the present invention. The location device 10 of the subway substation provided by the embodiment of the invention is used for realizing all the processes and steps of the location method of the subway substation in the embodiment, and comprises the following steps:
the simulation model building module 11 is used for building a simulation model comprising a subway, a transformer substation and a power transmission line according to the acquired actual measurement parameters of the related power equipment for building the subway transformer substation and the power transmission line;
the relation graph obtaining module 12 is configured to consider different influencing factors, respectively simulate the simulation model for each influencing factor to obtain a direct current bias voltage change result under each influencing factor, and obtain a relation graph of each influencing factor and a direct current bias voltage according to the direct current bias voltage change result under each influencing factor;
the total direct current magnetic bias resistance acquisition module 13 is used for establishing an equivalent direct current resistance model of a direct current magnetic bias loop comprising a subway transformer substation, a power transmission line and a local transformer substation according to the actual measurement parameters, and obtaining the total direct current magnetic bias resistance of the system according to the equivalent direct current resistance model;
the maximum direct current bias voltage obtaining module 14 is configured to obtain a maximum allowable direct current bias voltage of the subway transformer substation according to the maximum allowed bias current of the transformer substation and the total direct current bias resistance;
and the subway transformer station position determining module 15 is used for determining the position of the subway transformer station according to the relation graph of each influence factor and the direct current bias voltage and the maximum allowable direct current bias voltage.
In the embodiment of the present invention, the measured parameters in the simulation model building module 11 include, but are not limited to, subway tunnel structure information, subway peripheral soil resistivity, layering conditions, traction substation position information, and traction power supply current waveforms.
Illustratively, the simulation model is based on the light-of-Way software package in CDEGS, including but not limited to subway lines, catenary models, reinforced concrete structures, drainage nets, overhead lines, lightning conductors, and the like.
In the embodiment of the invention, the 'consider different influencing factors, respectively simulate and obtain the direct current bias voltage change result under each influencing factor by aiming at each influencing factor in the simulation model, and obtain the relation graph of each influencing factor and the direct current bias voltage according to the direct current bias voltage change result under each influencing factor', wherein the influencing factors comprise the distance from a subway transformer station to a subway line and the parallel length of a power transmission line from the subway transformer station to a local transformer station to the subway, and the relation graph of the influencing factors and the direct current bias voltage comprises the relation graph of the distance and the direct current bias voltage and the relation graph of the parallel length and the direct current bias voltage.
In the embodiment of the invention, different influencing factors are considered, each influencing factor is respectively simulated, and specifically, when the simulation is performed on the simulation model aiming at the distance, other variables (parallel length and the like) are kept unchanged, the distance is selected as a variable on the simulation model, the influence of the distance on the bias voltage is researched, and then a relation graph of the distance and the direct current bias voltage is obtained.
Referring to fig. 2 and 3, fig. 2 is a graph of distance versus the dc bias voltage provided by the embodiment of the present invention, and fig. 3 is a graph of parallel length versus the dc bias voltage provided by the embodiment of the present invention, where it can be seen from fig. 2 and 3 that the magnitude of the bias voltage increases continuously with increasing parallel distance and decreases with increasing distance.
In the embodiment of the present invention, the total dc bias resistor obtaining module 13 "establishes an equivalent dc resistance model including dc bias circuits of the subway transformer substation, the power transmission line and the local transformer substation" according to the measured parameters, where the equivalent dc resistance model includes dc equivalent circuits of each power device listed in fig. 4. In fig. 4, (a) is a high-voltage side dc equivalent model of the double-winding transformer, (b) is an autotransformer equivalent model diagram, (c) is a transmission line equivalent model diagram, (d) is a transformer substation grounding autotransformer and non-autotransformer dc model, (e) is a tower and lightning conductor dc model, and (f) is an equivalent dc resistance model established according to each power device.
Then, the total DC bias resistance of the system in the equivalent DC resistance model isWherein R is Tm And R is Tn Winding equivalent direct current resistances of the transformer m and the transformer n respectively, R gn And R is gm Equivalent grounding resistances R of the grounded neutral points of the transformer m and the transformer n respectively Lmn Is the equivalent direct current resistance of the transmission line between the transformer m and the transformer n, n is the return number of the transmission line.
In the embodiment of the invention, the maximum allowable direct current bias voltage is the product of the maximum bias current and the total direct current bias resistance.
In one embodiment, the subway substation location determining module 15 is specifically configured to:
determining the minimum distance from the subway transformer station to the subway line according to the relation graph of the distance and the direct current bias voltage and the maximum allowable direct current bias voltage;
determining the longest parallel length of a power transmission line from a subway transformer station to a local transformer station and a subway according to the relation graph of the parallel length and the direct current bias voltage and the maximum allowable direct current bias voltage;
and determining a position area established by the subway transformer substation according to the minimum distance and the longest parallel length, wherein the position area is that the distance from the subway transformer substation to a subway line is larger than the minimum distance, and the parallel length of the power transmission line from the subway transformer substation to the local transformer substation and the subway is smaller than the longest parallel length.
In the embodiment of the invention, when the maximum allowable dc bias voltage is determined, the distance and parallel length corresponding to the dc bias voltage equal to the maximum allowable dc bias voltage can be found in the graph of the relationship between the distance and the dc bias voltage, and in the graph of the relationship between the distance and the dc bias voltage, the dc bias voltage increases with the increase of the distance, and in the parallel length and the dc bias voltage, the dc bias voltage increases with the increase of the parallel length, at this time, in order not to exceed the maximum allowable dc bias voltage, the subway substation should be built in a region where the distance from the subway substation to the subway line is greater than the minimum distance, and the parallel length of the power transmission line from the subway substation to the local substation to the subway is smaller than the maximum parallel length.
The embodiment of the invention also provides an address selecting device of the subway transformer substation, which comprises a processor, a memory and a computer program stored in the memory and configured to be executed by the processor, wherein the address selecting method of the subway transformer substation provided by the embodiment is realized when the processor executes the computer program, for example, steps S11 to S15 in FIG. 1; alternatively, the processor may implement the functions of the modules in the above-described device embodiments, such as the simulation model building module 11, when executing the computer program.
The computer program may be divided into one or more modules, which are stored in the memory and executed by the processor to accomplish the present invention, for example. The one or more modules may be a series of computer program instruction segments capable of performing a specific function, the instruction segments describing the execution of the computer program in a method of site selection of the subway substation. For example, the computer program may be divided into a simulation model building module 11, a relationship graph obtaining module 12, a total dc bias resistance obtaining module 13, a maximum dc bias voltage obtaining module 14, and a subway substation position determining module 15. The specific working process of each module may refer to the working process of the site selection device 10 of the subway substation in the foregoing embodiment, and will not be described herein again.
The site selection equipment of the subway transformer substation can be computing equipment such as a desktop computer, a notebook computer, a palm computer and a cloud server. The site selection equipment of the subway substation can comprise, but is not limited to, a processor and a memory. It will be appreciated by those skilled in the art that the schematic diagram is merely an example of a text typesetting device for a web page, and does not constitute a limitation of the site selection device for a subway substation, and may include more or less components than those illustrated, or combine some components, or different components, e.g., the site selection device for a subway substation may further include an input/output device, a network access device, a bus, etc.
The processor may be a central processing unit (Central Processing Unit, CPU), but may also be other general purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), off-the-shelf programmable gate arrays (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. The general processor may be a microprocessor or the processor may be any conventional processor, etc., and the processor is a control center of the site selection device of the subway substation, and connects various parts of the site selection device of the subway substation of the whole webpage by using various interfaces and lines.
The memory may be used to store the computer program and/or module, and the processor may implement various functions of the site selection apparatus of the subway substation by running or executing the computer program and/or module stored in the memory and invoking data stored in the memory. The memory may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program (such as a sound playing function, an image playing function, etc.) required for at least one function, and the like; the storage data area may store data (such as audio data, phonebook, etc.) created according to the use of the handset, etc. In addition, the memory may include high-speed random access memory, and may also include non-volatile memory, such as a hard disk, memory, plug-in hard disk, smart Media Card (SMC), secure Digital (SD) Card, flash Card (Flash Card), at least one disk storage device, flash memory device, or other volatile solid-state storage device.
The module integrated by the site selection equipment of the subway transformer substation can be stored in a computer readable storage medium if the module is realized in the form of a software functional unit and sold or used as an independent product. Based on such understanding, the present invention may implement all or part of the flow of the method of the above embodiment, or may be implemented by a computer program to instruct related hardware, where the computer program may be stored in a computer readable storage medium, and when the computer program is executed by a processor, the computer program may implement the steps of each of the method embodiments described above. Wherein the computer program comprises computer program code which may be in source code form, object code form, executable file or some intermediate form etc. The computer readable medium may include: any entity or device capable of carrying the computer program code, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer Memory, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), an electrical carrier signal, a telecommunications signal, a software distribution medium, and so forth.
The embodiment of the invention also provides a computer readable storage medium, which comprises a stored computer program, wherein when the computer program runs, equipment where the computer readable storage medium is located is controlled to execute the method for selecting the address of the subway substation provided by the embodiment, for example, steps S11 to S15 in FIG. 1.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that changes and modifications may be made without departing from the principles of the invention, such changes and modifications are also intended to be within the scope of the invention.
Claims (4)
1. The site selection method for the subway transformer substation is characterized by comprising the following steps of:
according to the acquired actual measurement parameters of related power equipment for building the subway transformer substation and the power transmission line, building a simulation model comprising the subway, the transformer substation and the power transmission line;
considering different influence factors, respectively simulating the simulation model for each influence factor to obtain a direct current bias voltage change result under each influence factor, and obtaining a relation graph of each influence factor and the direct current bias voltage according to the direct current bias voltage change result under each influence factor;
establishing an equivalent direct current resistance model of a direct current magnetic bias loop comprising a subway transformer substation, a power transmission line and a local transformer substation according to the actual measurement parameters, and obtaining the total direct current magnetic bias resistance of the system according to the equivalent direct current resistance model;
obtaining the maximum allowable direct current bias voltage of the subway transformer substation according to the maximum allowable magnetic bias current of the transformer substation and the total direct current magnetic bias resistance;
determining the position of the subway transformer substation according to the relation graph of each influence factor and the direct current bias voltage and the maximum allowable direct current bias voltage;
the measured parameters comprise subway tunnel structure information, subway peripheral soil resistivity, layering conditions, traction substation position information and traction power supply current waveforms;
the influence factors comprise the distance from a subway transformer station to a subway line and the parallel length of a power transmission line from the subway transformer station to a local transformer station and the subway, and the relation curve graph of the influence factors and the direct current bias voltage comprises the relation curve graph of the distance and the direct current bias voltage and the relation curve graph of the parallel length and the direct current bias voltage;
the determining the position of the subway transformer substation according to the relation graph of each influence factor and the direct current bias voltage and the maximum allowable direct current bias voltage specifically comprises the following steps:
determining the minimum distance from the subway transformer station to the subway line according to the relation graph of the distance and the direct current bias voltage and the maximum allowable direct current bias voltage;
determining the longest parallel length of a power transmission line from a subway transformer station to a local transformer station and a subway according to the relation graph of the parallel length and the direct current bias voltage and the maximum allowable direct current bias voltage;
and determining a position area established by the subway transformer substation according to the minimum distance and the longest parallel length, wherein the position area is that the distance from the subway transformer substation to a subway line is larger than the minimum distance, and the parallel length of the power transmission line from the subway transformer substation to the local transformer substation and the subway is smaller than the longest parallel length.
2. The utility model provides a subway transformer substation's site selection device which characterized in that includes:
the simulation model building module is used for building a simulation model comprising a subway, a transformer substation and a power transmission line according to the acquired actual measurement parameters of the related power equipment for building the subway transformer substation and the power transmission line;
the relation graph acquisition module is used for considering different influence factors, respectively simulating the simulation model for each influence factor to obtain a direct-current bias voltage change result under each influence factor, and obtaining a relation graph of each influence factor and the direct-current bias voltage according to the direct-current bias voltage change result under each influence factor;
the total direct current magnetic bias resistance acquisition module is used for establishing an equivalent direct current resistance model of a direct current magnetic bias loop comprising a subway transformer substation, a power transmission line and a local transformer substation according to the actual measurement parameters, and obtaining the total direct current magnetic bias resistance of the system according to the equivalent direct current resistance model;
the maximum direct current bias voltage acquisition module is used for obtaining the maximum allowable direct current bias voltage of the subway transformer substation according to the maximum allowed magnetic bias current of the transformer substation and the total direct current magnetic bias resistance;
the subway transformer station position determining module is used for determining the position of the subway transformer station according to the relation curve graph of each influence factor and the direct current bias voltage and the maximum allowable direct current bias voltage;
the measured parameters comprise subway tunnel structure information, subway peripheral soil resistivity, layering conditions, traction substation position information and traction power supply current waveforms;
the influence factors comprise the distance from a subway transformer station to a subway line and the parallel length of a power transmission line from the subway transformer station to a local transformer station and the subway, and the relation curve graph of the influence factors and the direct current bias voltage comprises the relation curve graph of the distance and the direct current bias voltage and the relation curve graph of the parallel length and the direct current bias voltage;
the subway transformer substation determining module is specifically used for:
determining the minimum distance from the subway transformer station to the subway line according to the relation graph of the distance and the direct current bias voltage and the maximum allowable direct current bias voltage;
determining the longest parallel length of a power transmission line from a subway transformer station to a local transformer station and a subway according to the relation graph of the parallel length and the direct current bias voltage and the maximum allowable direct current bias voltage;
and determining a position area established by the subway transformer substation according to the minimum distance and the longest parallel length, wherein the position area is that the distance from the subway transformer substation to a subway line is larger than the minimum distance, and the parallel length of the power transmission line from the subway transformer substation to the local transformer substation and the subway is smaller than the longest parallel length.
3. A site selection apparatus for a subway substation, comprising a processor, a memory and a computer program stored in the memory and configured to be executed by the processor, the processor implementing the site selection method for a subway substation according to claim 1 when executing the computer program.
4. A computer readable storage medium, characterized in that the computer readable storage medium comprises a stored computer program, wherein the computer program when run controls a device in which the computer readable storage medium is located to perform the method for locating a subway substation according to claim 1.
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| CN117892211B (en) * | 2024-03-11 | 2024-06-18 | 国网上海市电力公司 | SVM-based subway and power grid electromagnetic coupling fault identification method |
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