Laying method and device of high-voltage parallel cable

Abstract

The invention relates to the technical field of power cables, and discloses a laying method and device for high-voltage parallel cables. The method comprises the steps of determining a construction form of a high-voltage parallel cable according to construction requirements; geophysical prospecting is performed on the high-voltage parallel cable according to the construction form, and a laying space of the high-voltage parallel cable is determined according to a geophysical prospecting result based on a three-dimensional technology; comparing the laying space with a preset specification requirement, and determining a laying mode of the high-voltage parallel cable; based on the laying mode and construction requirements, performing simulation processing on the high-voltage parallel cable to obtain cable current-carrying capacities of a plurality of sub-loops of the high-voltage parallel cable; judging whether the high-voltage parallel cable meets a preset unbalance degree requirement or not based on the cable current-carrying capacity of each sub-loop; and if not, correcting the laying mode by reducing the reactance of the parallel cable. According to the invention, high-voltage parallel cable construction is realized, parallel reactance is flexibly reduced, power transmission capacity is effectively increased, and power transmission efficiency and safety are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of power cables, and in particular to a method and device for laying high-voltage parallel cables. Background Art

[0002] With the continuous advancement of urbanization, the power load has further increased. Cable transmission lines have gradually become the mainstream transmission method in urban areas. At present, the maximum cross-section of high-voltage cables commonly used in China is 2500mm. 2 , the transmission capacity of a single high-voltage cable laid in a cable tunnel can no longer meet the electricity demand; whether it is the construction of a new cable line or the capacity expansion and transformation of an existing high-voltage cable line, the same-phase parallel cables have been increasingly used in actual projects.

[0003] In the same-phase parallel cable line, there are complex electromagnetic connections between the sub-cables, which may lead to unbalanced electrical parameters and thus unbalanced current carrying capacity of the same-phase parallel cable line, which will not only greatly reduce the overall transmission capacity of the same-phase parallel cable line, but also cause serious accidents such as overheating and breakdown of some cables during actual operation. Therefore, in order to ensure the safe operation of the same-phase parallel cable line and improve the transmission capacity of the cable line, it is necessary to ensure that the unbalanced current carrying capacity of the same-phase parallel cable meets the requirements. If it does not meet the requirements, measures should be taken to reduce the electromagnetic influence between the same-phase sub-cables. Summary of the invention

[0004] The present invention provides a method and device for laying high-voltage parallel cables, which realizes the construction of high-voltage parallel cables, flexibly reduces parallel reactance, effectively increases transmission capacity, and improves transmission efficiency and safety.

[0005] In order to solve the above technical problems, the present invention provides a method for laying high-voltage parallel cables, comprising:

[0006] Determine the construction form of high-voltage parallel cables according to construction requirements;

[0007] Conducting geophysical exploration of the high-voltage parallel cables according to the construction form, and determining the laying space of the high-voltage parallel cables according to the geophysical exploration results based on three-dimensional technology;

[0008] Comparing the laying space with preset specification requirements to determine the laying method of the high-voltage parallel cable;

[0009] Based on the laying method and the construction requirements, the high-voltage parallel cable is simulated to obtain the cable current carrying capacity of several sub-loops of the high-voltage parallel cable;

[0010] Based on the cable current carrying capacity of each sub-circuit, determining whether the high-voltage parallel cable meets the preset unbalance requirement;

[0011] When the high-voltage parallel cables do not meet the preset unbalance requirement, the laying method is corrected by reducing the parallel cable reactance.

[0012] Furthermore, the construction form of the high-voltage parallel cable is determined according to the construction requirements, specifically:

[0013] Determine the line category to which the high-voltage parallel cable belongs by analyzing the construction requirements;

[0014] When the line to which the high-voltage parallel cable belongs is a newly built line, determining the construction form of the high-voltage parallel cable to be a new cable construction;

[0015] When the line to which the high-voltage parallel cable belongs is an existing line, it is determined that the construction form of the high-voltage parallel cable is cable reconstruction.

[0016] Furthermore, the geophysical exploration of the high-voltage parallel cables is performed according to the construction form, and the laying space of the high-voltage parallel cables is determined according to the geophysical exploration results based on three-dimensional technology, including:

[0017] When the construction form of the high-voltage parallel cable is a new cable construction, determining the construction location of the high-voltage parallel cable according to the construction requirements;

[0018] Conducting geophysical exploration on the construction location to generate geophysical exploration results;

[0019] Based on the three-dimensional technology, determine the construction range of the high-voltage parallel cable according to the geophysical exploration results;

[0020] Determine the width and height of the new cable channel within the constructible range;

[0021] Based on the width and height of the newly built cable channel, the laying space of the high-voltage parallel cables is determined according to the construction requirements.

[0022] Furthermore, the geophysical exploration of the high-voltage parallel cables is performed according to the construction form, and the laying space of the high-voltage parallel cables is determined according to the geophysical exploration results based on three-dimensional technology, including:

[0023] When the construction form of the high-voltage parallel cable is cable reconstruction, the construction location of the high-voltage parallel cable is determined according to the construction requirements, and existing data of the existing cable channel is obtained;

[0024] Conducting geophysical exploration on the construction location to generate geophysical exploration results;

[0025] Based on the three-dimensional technology, according to the existing data of the existing cable channel and the geophysical exploration results, determine the width and height of the existing cable channel, and the laying position of the existing cables in the existing cable channel;

[0026] Determining the remaining space of the existing cable channel based on the width and height of the existing cable channel and the laying positions of the existing cables in the existing cable channel;

[0027] Based on the remaining space of the existing cable channel, the laying space of the high-voltage parallel cable is determined according to the construction requirements.

[0028] Furthermore, the laying space is compared with the preset specification requirements to determine the laying method of the high-voltage parallel cable, specifically:

[0029] Determining respectively the preset triangular specification requirements and the preset horizontal specification requirements in the preset specification requirements;

[0030] Compare the laying space with the preset herringbone specification requirements;

[0031] When the laying space meets the preset herringbone-shaped specification requirements, determining that the laying mode of the high-voltage parallel cable is a herringbone-shaped laying mode;

[0032] When the laying space does not meet the preset herringbone specification requirements, comparing the laying space with the preset horizontal specification requirements;

[0033] When the laying space meets the preset horizontal specification requirements, it is determined that the laying method of the high-voltage parallel cable is horizontal laying.

[0034] Furthermore, based on the laying method and the construction requirements, the high-voltage parallel cable is simulated to obtain the cable current carrying capacity of several sub-loops of the high-voltage parallel cable, specifically:

[0035] Based on the laying method and the construction requirements, the high-voltage parallel cable is simulated to obtain a simulated high-voltage parallel cable;

[0036] Current transmission simulation processing is performed on several sub-loops in the simulated high-voltage parallel cable to obtain the cable current carrying capacity of each sub-loop of the high-voltage parallel cable.

[0037] Further, judging whether the high-voltage parallel cable meets the preset unbalance requirement based on the cable current carrying capacity of each sub-loop is specifically as follows:

[0038] Calculate the difference in the current carrying capacity of the cables between the sub-circuits, and compare the calculated difference in the current carrying capacity of each cable with a preset difference threshold;

[0039] When there is a cable current carrying capacity difference greater than the preset difference threshold, it is determined that the high-voltage parallel cable does not meet the preset unbalance requirement.

[0040] Furthermore, when the high-voltage parallel cable does not meet the preset unbalance requirement, the laying method is corrected by reducing the parallel cable reactance, specifically:

[0041] When the construction form of the high-voltage parallel cable is a new cable, based on the laying method of the high-voltage parallel cable, a plurality of magnetic shielding boxes are added to the laying space of the high-voltage parallel cable.

[0042] Furthermore, when the high-voltage parallel cable does not meet the preset unbalance requirement, the laying method is corrected by reducing the parallel cable reactance, specifically:

[0043] When the construction form of the high-voltage parallel cable is cable reconstruction, the high-voltage parallel cable is wound with magnetic shielding material based on the laying method of the high-voltage parallel cable.

[0044] The present invention provides a method for laying high-voltage parallel cables, which determines the construction form of the high-voltage parallel cables according to the construction requirements; performs geophysical exploration on the high-voltage parallel cables according to the construction form, and determines the laying space of the high-voltage parallel cables based on the geophysical exploration results based on three-dimensional technology; compares the laying space with the preset specification requirements to determine the laying method of the high-voltage parallel cables; simulates the high-voltage parallel cables based on the laying method and construction requirements to obtain the cable current carrying capacity of several sub-circuits of the high-voltage parallel cables; judges whether the high-voltage parallel cables meet the preset imbalance requirements based on the cable current carrying capacity of each sub-circuit; when the high-voltage parallel cables do not meet the preset imbalance requirements, the laying method is corrected by reducing the parallel cable reactance. The present invention covers different application scenarios of new lines and modified lines, and can flexibly adopt different laying methods according to the existing available space, and adjust the current carrying capacity imbalance by reducing the joint reactance, which effectively increases the transmission capacity and improves the transmission efficiency and safety.

[0045] Accordingly, the present invention provides a high-voltage parallel cable laying device, comprising: a construction form determination module, a laying space determination module, a laying mode determination module, a data acquisition module, an unbalance judgment module and a laying mode correction module;

[0046] The construction form determination module is used to determine the construction form of the high-voltage parallel cable according to the construction requirements;

[0047] The laying space determination module is used to perform geophysical exploration on the high-voltage parallel cables according to the construction form, and determine the laying space of the high-voltage parallel cables according to the geophysical exploration results based on three-dimensional technology;

[0048] The laying mode determination module is used to compare the laying space with the preset specification requirements to determine the laying mode of the high-voltage parallel cable;

[0049] The data acquisition module is used to simulate the high-voltage parallel cable based on the laying method and the construction requirements to obtain the cable current carrying capacity of several sub-loops of the high-voltage parallel cable;

[0050] The imbalance judgment module is used to judge whether the high-voltage parallel cable meets the preset imbalance requirement based on the cable current carrying capacity of each sub-loop;

[0051] The laying mode correction module is used to correct the laying mode by reducing the parallel cable reactance when the high-voltage parallel cable does not meet the preset imbalance requirement.

[0052] The present invention provides a laying device for high-voltage parallel cables. Based on the organic combination between modules, the construction form of the high-voltage parallel cables is determined according to the construction requirements; geophysical exploration is performed on the high-voltage parallel cables according to the construction form, and based on three-dimensional technology, the laying space of the high-voltage parallel cables is determined according to the geophysical exploration results; the laying space is compared with the preset specification requirements to determine the laying method of the high-voltage parallel cables; based on the laying method and construction requirements, the high-voltage parallel cables are simulated to obtain the cable current carrying capacity of several sub-circuits of the high-voltage parallel cables; based on the cable current carrying capacity of each sub-circuit, it is judged whether the high-voltage parallel cables meet the preset unbalance requirements; when the high-voltage parallel cables do not meet the preset unbalance requirements, the laying method is corrected by reducing the parallel cable reactance. The present invention covers different application scenarios of new lines and modified lines, and different laying methods can be flexibly adopted according to the existing available space, and the current carrying capacity imbalance is adjusted by reducing the joint reactance, which effectively increases the transmission capacity and improves the transmission efficiency and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 A schematic flow chart of an embodiment of a method for laying high-voltage parallel cables provided by the present invention;

[0054] Figure 2 A schematic diagram of a method for correcting a laying mode provided by the present invention;

[0055] Figure 3 Another schematic diagram of the method for correcting the laying mode provided by the present invention;

[0056] Figure 4 Another schematic diagram of the method for correcting the laying mode provided by the present invention;

[0057] Figure 5A schematic flow chart of another embodiment of a method for laying high-voltage parallel cables provided by the present invention;

[0058] Figure 6 A schematic structural diagram of an embodiment of a high-voltage parallel cable laying device provided by the present invention. DETAILED DESCRIPTION

[0059] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0060] The flowcharts shown in the accompanying drawings are only examples and do not necessarily include all the contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps may also be decomposed, combined or partially merged, so the actual execution order may change according to actual conditions.

[0061] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0062] Example 1

[0063] See also Figure 1 , is a flow chart of an embodiment of a method for laying high-voltage parallel cables provided by the present invention, the method comprising steps 101 to 106, each of which is specifically as follows:

[0064] Step 101: Determine the construction form of the high-voltage parallel cable according to the construction requirements.

[0065] Furthermore, in the first embodiment of the present invention, the construction form of the high-voltage parallel cable is determined according to the construction requirements, specifically:

[0066] Determine the line category to which the high-voltage parallel cable belongs by analyzing the construction requirements;

[0067] When the line to which the high-voltage parallel cable belongs is a newly built line, determining the construction form of the high-voltage parallel cable to be a new cable construction;

[0068] When the line to which the high-voltage parallel cable belongs is an existing line, it is determined that the construction form of the high-voltage parallel cable is cable reconstruction.

[0069] In the first embodiment of the present invention, when constructing a high-voltage parallel cable, it is first determined whether the line to which the high-voltage parallel cable belongs is a new line or an existing line. Different line conditions correspond to different construction forms of the high-voltage parallel cable, and thus different laying methods of the high-voltage parallel cable are determined.

[0070] Step 102: Performing geophysical exploration on the high-voltage parallel cables according to the construction form, and determining the laying space of the high-voltage parallel cables according to the geophysical exploration results based on three-dimensional technology.

[0071] In the first embodiment of the present invention, after the construction form of the high-voltage parallel cable is determined according to the construction requirements, different line analyses are performed according to different line conditions to determine the laying space of the high-voltage parallel cable.

[0072] Furthermore, in the first embodiment of the present invention, geophysical exploration is performed on the high-voltage parallel cable according to the construction form, and based on three-dimensional technology, the laying space of the high-voltage parallel cable is determined according to the geophysical exploration results, including:

[0073] When the construction form of the high-voltage parallel cable is a new cable construction, determining the construction location of the high-voltage parallel cable according to the construction requirements;

[0074] Conducting geophysical exploration on the construction location to generate geophysical exploration results;

[0075] Based on the three-dimensional technology, determine the construction range of the high-voltage parallel cable according to the geophysical exploration results;

[0076] Determine the width and height of the new cable channel within the constructible range;

[0077] Based on the width and height of the newly built cable channel, the laying space of the high-voltage parallel cables is determined according to the construction requirements.

[0078] Optionally, when the line to which the high-voltage parallel cable belongs is a newly built line, that is, when the construction form of the high-voltage parallel cable is a new cable, the construction location of the high-voltage parallel cable is first determined in the construction requirements, and geophysical exploration is carried out according to the on-site conditions of the construction location. The geophysical exploration results are imported into the three-dimensional software to determine the construction range. By adjusting the cable layout space within the construction range, the width and height of the new cable channel can be determined, and then the laying space of the high-voltage parallel cable can be determined according to the construction requirements.

[0079] Furthermore, in the first embodiment of the present invention, geophysical exploration is performed on the high-voltage parallel cable according to the construction form, and based on three-dimensional technology, the laying space of the high-voltage parallel cable is determined according to the geophysical exploration results, including:

[0080] When the construction form of the high-voltage parallel cable is cable reconstruction, the construction location of the high-voltage parallel cable is determined according to the construction requirements, and existing data of the existing cable channel is obtained;

[0081] Conducting geophysical exploration on the construction location to generate geophysical exploration results;

[0082] Based on the three-dimensional technology, according to the existing data of the existing cable channel and the geophysical exploration results, determine the width and height of the existing cable channel, and the laying position of the existing cables in the existing cable channel;

[0083] Determining the remaining space of the existing cable channel based on the width and height of the existing cable channel and the laying positions of the existing cables in the existing cable channel;

[0084] Based on the remaining space of the existing cable channel, the laying space of the high-voltage parallel cable is determined according to the construction requirements.

[0085] Optionally, when the line to which the high-voltage parallel cable belongs is an existing line, that is, when the construction form of the high-voltage parallel cable is cable reconstruction, the construction position of the high-voltage parallel cable is determined according to the construction requirements, the existing line is geophysical surveyed, and the existing data of the existing cable channel is obtained, and the geophysical survey results and the existing data of the existing cable channel are imported into the three-dimensional software to determine the width and height of the existing cable channel, as well as the laying positions of the cables already laid in the existing cable channel. After obtaining the width and height of the existing cable channel, as well as the laying positions already used in the existing cable channel, the remaining space of the existing cable channel is determined. According to the construction requirements, the laying space of the high-voltage parallel cable can be determined in the remaining space of the existing cable channel.

[0086] Step 103: Compare the laying space with preset specification requirements to determine the laying method of the high-voltage parallel cable.

[0087] Furthermore, in the first embodiment of the present invention, the laying space is compared with the preset specification requirements to determine the laying method of the high-voltage parallel cable, specifically:

[0088] Determining respectively the preset triangular specification requirements and the preset horizontal specification requirements in the preset specification requirements;

[0089] Compare the laying space with the preset herringbone specification requirements;

[0090] When the laying space meets the preset herringbone-shaped specification requirements, determining that the laying mode of the high-voltage parallel cable is a herringbone-shaped laying mode;

[0091] When the laying space does not meet the preset herringbone specification requirements, comparing the laying space with the preset horizontal specification requirements;

[0092] When the laying space meets the preset horizontal specification requirements, it is determined that the laying method of the high-voltage parallel cable is horizontal laying.

[0093] In the first embodiment of the present invention, after obtaining the laying space of the high-voltage parallel cable, the laying space data of the high-voltage parallel cable is compared with the preset specification requirements, and a more suitable laying method of the high-voltage parallel cable can be determined. Commonly used cable layout methods are herringbone layout and horizontal layout. Among them, the herringbone layout occupies a large longitudinal space, and the horizontal layout occupies a large lateral space. Different cable layout methods have an impact on the imbalance of the cable current carrying capacity, and the imbalance of the current carrying capacity of the horizontal arrangement is greater than the imbalance of the current carrying capacity of the herringbone arrangement. Therefore, in the case of meeting the preset requirements, the herringbone layout is preferred to reduce the imbalance of the cable current carrying capacity. As an example, the preset herringbone specification requirements can be set to the height of the laying space to meet the data greater than or equal to "2 times the outer diameter of the cable + 50mm".

[0094] Step 104: Based on the laying method and the construction requirements, the high-voltage parallel cable is simulated to obtain the cable current carrying capacity of several sub-loops of the high-voltage parallel cable.

[0095] Further, in the first embodiment of the present invention, based on the laying method and the construction requirements, the high-voltage parallel cable is simulated to obtain the cable current carrying capacity of several sub-loops of the high-voltage parallel cable, specifically:

[0096] Based on the laying method and the construction requirements, the high-voltage parallel cable is simulated to obtain a simulated high-voltage parallel cable;

[0097] Current transmission simulation processing is performed on several sub-loops in the simulated high-voltage parallel cable to obtain the cable current carrying capacity of each sub-loop of the high-voltage parallel cable.

[0098] In the first embodiment of the present invention, after the laying method of the high-voltage parallel cable is determined, the high-voltage parallel cable is simulated and constructed based on the construction requirements, and the transmission process of each sub-circuit in the high-voltage parallel cable is simulated. The current carrying capacity of each sub-circuit in the high-voltage parallel cable can be calculated by current carrying capacity calculation software.

[0099] Step 105: Based on the cable current carrying capacity of each of the sub-loops, determine whether the high-voltage parallel cable meets a preset unbalance requirement.

[0100] Further, in the first embodiment of the present invention, based on the cable current carrying capacity of each sub-loop, it is judged whether the high-voltage parallel cable meets the preset unbalance requirement, specifically:

[0101] Calculate the difference in the current carrying capacity of the cables between the sub-circuits, and compare the calculated difference in the current carrying capacity of each cable with a preset difference threshold;

[0102] When there is a cable current carrying capacity difference greater than the preset difference threshold, it is determined that the high-voltage parallel cable does not meet the preset unbalance requirement.

[0103] In the first embodiment of the present invention, after the current carrying capacity of each sub-circuit in the high-voltage parallel cable is calculated, the current carrying capacity difference between each sub-circuit is calculated, and by comparing with the preset difference threshold, it can be known whether the high-voltage parallel cable constructed under the current laying mode meets the preset imbalance requirement. As an example, the preset difference threshold can be set to 10%, that is, when the current carrying capacity difference between the parallel cables exceeds 10%, it is determined that the imbalance requirement is not met at present.

[0104] Step 106: When the high-voltage parallel cable does not meet the preset unbalance requirement, the laying method is corrected by reducing the parallel cable reactance.

[0105] In the first embodiment of the present invention, the conductor impedance is divided into the conductor self-impedance and the mutual impedance between adjacent cables. The self-impedance is related to the cable's own parameters. If the cable model is the same, the self-impedance is also the same; the mutual impedance depends on the relative position between the cables. Due to the magnetic field generated after the same-phase parallel cables pass through, the impedance value of each conductor will produce asymmetric differences, which will affect the current distribution of the same-phase parallel cables and cause uneven current distribution. Therefore, when the imbalance of the current carrying capacity of the same-phase parallel cables does not meet the requirements, the imbalance of the current carrying capacity can be effectively adjusted by reducing the mutual impedance of the same-phase parallel cables, so that the high-voltage parallel cables meet the preset imbalance requirements. The method of reducing the mutual impedance between parallel cables can be to add a magnetic shielding box or cover the surface of the cable with magnetic shielding material. The imbalance of the current carrying capacity is adjusted by correcting the laying method of the high-voltage parallel cables, so as to achieve a better high-voltage parallel cable construction effect.

[0106] Further, in the first embodiment of the present invention, when the high-voltage parallel cable does not meet the preset unbalance requirement, the laying method is corrected by reducing the parallel cable reactance, specifically:

[0107] When the construction form of the high-voltage parallel cable is a new cable, based on the laying method of the high-voltage parallel cable, a plurality of magnetic shielding boxes are added to the laying space of the high-voltage parallel cable.

[0108] In the first embodiment of the present invention, different laying method correction methods can be adopted according to different construction forms of high-voltage parallel cables. Figure 2 and Figure 3When the high-voltage parallel cable is constructed in the form of a new cable, the laying method of the high-voltage parallel cable can be modified by adding multiple magnetic shielding boxes in the laying space of the high-voltage parallel cable. As an example, when the high-voltage parallel cable is constructed in the form of a new cable and the laying method is a herringbone laying, you can refer to Figure 2 , add magnetic shielding boxes around the high-voltage parallel cables to reduce the parallel cable reactance. When the high-voltage parallel cables are constructed in the form of new cable construction and laid horizontally, refer to Figure 3 , add magnetic shielding boxes around the high-voltage parallel cables to reduce the parallel cable reactance.

[0109] Further, in the first embodiment of the present invention, when the high-voltage parallel cable does not meet the preset unbalance requirement, the laying method is corrected by reducing the parallel cable reactance, specifically:

[0110] When the construction form of the high-voltage parallel cable is cable reconstruction, the high-voltage parallel cable is wound with magnetic shielding material based on the laying method of the high-voltage parallel cable.

[0111] In the first embodiment of the present invention, different laying method correction methods can be adopted according to different construction forms of high-voltage parallel cables. The space required for winding magnetic shielding material is relatively small, so when the construction form of the high-voltage parallel cable is cable modification, the magnetic shielding material can be wound on the surface of the high-voltage parallel cable, thereby correcting the laying method of the high-voltage parallel cable. As an example, refer to Figure 4 When the high-voltage parallel cable is constructed in the form of new cable construction and is laid horizontally, the surface of the high-voltage parallel cable is covered with magnetic shielding material to reduce the parallel cable reactance.

[0112] As an example of the first embodiment of the present invention, see Figure 5 , is a flow chart of another embodiment of the method for laying high-voltage parallel cables provided by the present invention. When obtaining the construction requirements of the high-voltage parallel cables, the construction form of the new high-voltage cable route can be determined first, and the layout space of the high-voltage cables can be determined according to the construction form, and then the layout method of the high-voltage cables can be determined. After determining the layout method of the high-voltage cables, the high-voltage cables are simulated, and the relevant calculations of the cable current carrying capacity are used to determine whether the high-voltage cables constructed according to the layout method meet the imbalance requirements. If the imbalance requirements are not met, the layout method of the high-voltage cables is corrected by reducing the reactance of the parallel cables, so that the double-spliced ​​high-voltage cable lines are engineered to meet greater power demands.

[0113] In summary, the first embodiment of the present invention provides a method for laying high-voltage parallel cables, which determines the construction form of the high-voltage parallel cables according to the construction requirements; performs geophysical exploration on the high-voltage parallel cables according to the construction form, and determines the laying space of the high-voltage parallel cables based on the geophysical exploration results based on three-dimensional technology; compares the laying space with the preset specification requirements to determine the laying method of the high-voltage parallel cables; simulates the high-voltage parallel cables based on the laying method and construction requirements to obtain the cable current carrying capacity of several sub-circuits of the high-voltage parallel cables; based on the cable current carrying capacity of each sub-circuit, determines whether the high-voltage parallel cables meet the preset imbalance requirements; when the high-voltage parallel cables do not meet the preset imbalance requirements, the laying method is corrected by reducing the parallel cable reactance. The present invention covers different application scenarios of new lines and modified lines, and can flexibly adopt different laying methods according to the existing available space, and adjust the current carrying capacity imbalance by reducing the joint reactance, which effectively increases the transmission capacity and improves the transmission efficiency and safety.

[0114] Example 2

[0115] See also Figure 6 , is a structural schematic diagram of an embodiment of a high-voltage parallel cable laying device provided by the present invention, the device comprises a construction form determination module 201, a laying space determination module 202, a laying mode determination module 203, a data acquisition module 204, an unbalance determination module 205 and a laying mode correction module 206;

[0116] The construction form determination module 201 is used to determine the construction form of the high-voltage parallel cable according to the construction requirements;

[0117] The laying space determination module 202 is used to perform geophysical exploration on the high-voltage parallel cables according to the construction form, and determine the laying space of the high-voltage parallel cables according to the geophysical exploration results based on three-dimensional technology;

[0118] The laying mode determination module 203 is used to compare the laying space with the preset specification requirements to determine the laying mode of the high-voltage parallel cable;

[0119] The data acquisition module 204 is used to simulate the high-voltage parallel cable based on the laying method and the construction requirements to obtain the cable current carrying capacity of several sub-loops of the high-voltage parallel cable;

[0120] The imbalance determination module 205 is used to determine whether the high-voltage parallel cable meets the preset imbalance requirement based on the cable current carrying capacity of each sub-loop;

[0121] The laying mode correction module 206 is used to correct the laying mode by reducing the parallel cable reactance when the high-voltage parallel cable does not meet the preset unbalance requirement.

[0122] Furthermore, in the second embodiment of the present invention, the construction form of the high-voltage parallel cable is determined according to the construction requirements, specifically:

[0123] Determine the line category to which the high-voltage parallel cable belongs by analyzing the construction requirements;

[0124] When the line to which the high-voltage parallel cable belongs is a newly built line, determining the construction form of the high-voltage parallel cable to be a new cable construction;

[0125] When the line to which the high-voltage parallel cable belongs is an existing line, it is determined that the construction form of the high-voltage parallel cable is cable reconstruction.

[0126] Furthermore, in a second embodiment of the present invention, geophysical exploration is performed on the high-voltage parallel cable according to the construction form, and based on three-dimensional technology, the laying space of the high-voltage parallel cable is determined according to the geophysical exploration results, including:

[0127] When the construction form of the high-voltage parallel cable is a new cable construction, determining the construction location of the high-voltage parallel cable according to the construction requirements;

[0128] Conducting geophysical exploration on the construction location to generate geophysical exploration results;

[0129] Based on the three-dimensional technology, determine the construction range of the high-voltage parallel cable according to the geophysical exploration results;

[0130] Determine the width and height of the new cable channel within the constructible range;

[0131] Based on the width and height of the newly built cable channel, the laying space of the high-voltage parallel cables is determined according to the construction requirements.

[0132] Furthermore, in a second embodiment of the present invention, geophysical exploration is performed on the high-voltage parallel cable according to the construction form, and based on three-dimensional technology, the laying space of the high-voltage parallel cable is determined according to the geophysical exploration results, including:

[0133] When the construction form of the high-voltage parallel cable is cable reconstruction, the construction location of the high-voltage parallel cable is determined according to the construction requirements, and existing data of the existing cable channel is obtained;

[0134] Conducting geophysical exploration on the construction location to generate geophysical exploration results;

[0135] Based on the three-dimensional technology, according to the existing data of the existing cable channel and the geophysical exploration results, determine the width and height of the existing cable channel, and the laying position of the existing cables in the existing cable channel;

[0136] Determining the remaining space of the existing cable channel based on the width and height of the existing cable channel and the laying positions of the existing cables in the existing cable channel;

[0137] Based on the remaining space of the existing cable channel, the laying space of the high-voltage parallel cable is determined according to the construction requirements.

[0138] Furthermore, in the second embodiment of the present invention, the laying space is compared with the preset specification requirements to determine the laying method of the high-voltage parallel cable, specifically:

[0139] Determining respectively the preset triangular specification requirements and the preset horizontal specification requirements in the preset specification requirements;

[0140] Compare the laying space with the preset herringbone specification requirements;

[0141] When the laying space meets the preset herringbone-shaped specification requirements, determining that the laying mode of the high-voltage parallel cable is a herringbone-shaped laying mode;

[0142] When the laying space does not meet the preset herringbone specification requirements, comparing the laying space with the preset horizontal specification requirements;

[0143] When the laying space meets the preset horizontal specification requirements, it is determined that the laying method of the high-voltage parallel cable is horizontal laying.

[0144] Further, in the second embodiment of the present invention, based on the laying method and the construction requirements, the high-voltage parallel cable is simulated to obtain the cable current carrying capacity of several sub-loops of the high-voltage parallel cable, specifically:

[0145] Based on the laying method and the construction requirements, the high-voltage parallel cable is simulated to obtain a simulated high-voltage parallel cable;

[0146] Current transmission simulation processing is performed on several sub-loops in the simulated high-voltage parallel cable to obtain the cable current carrying capacity of each sub-loop of the high-voltage parallel cable.

[0147] Further, in the second embodiment of the present invention, based on the cable current carrying capacity of each sub-loop, it is judged whether the high-voltage parallel cable meets the preset unbalance requirement, specifically:

[0148] Calculate the difference in the current carrying capacity of the cables between the sub-circuits, and compare the calculated difference in the current carrying capacity of each cable with a preset difference threshold;

[0149] When there is a cable current carrying capacity difference greater than the preset difference threshold, it is determined that the high-voltage parallel cable does not meet the preset unbalance requirement.

[0150] Further, in the second embodiment of the present invention, when the high-voltage parallel cable does not meet the preset unbalance requirement, the laying method is corrected by reducing the parallel cable reactance, specifically:

[0151] When the construction form of the high-voltage parallel cable is a new cable, based on the laying method of the high-voltage parallel cable, a plurality of magnetic shielding boxes are added to the laying space of the high-voltage parallel cable.

[0152] Further, in the second embodiment of the present invention, when the high-voltage parallel cable does not meet the preset unbalance requirement, the laying method is corrected by reducing the parallel cable reactance, specifically:

[0153] When the construction form of the high-voltage parallel cable is cable reconstruction, the high-voltage parallel cable is wound with magnetic shielding material based on the laying method of the high-voltage parallel cable.

[0154] In summary, the second embodiment of the present invention provides a laying device for high-voltage parallel cables, which is based on the organic combination of modules and determines the construction form of high-voltage parallel cables according to construction requirements; performs geophysical exploration on high-voltage parallel cables according to the construction form, and determines the laying space of high-voltage parallel cables based on the geophysical exploration results based on three-dimensional technology; compares the laying space with the preset specification requirements to determine the laying method of high-voltage parallel cables; simulates the high-voltage parallel cables based on the laying method and construction requirements to obtain the cable current carrying capacity of several sub-circuits of the high-voltage parallel cables; judges whether the high-voltage parallel cables meet the preset imbalance requirements based on the cable current carrying capacity of each sub-circuit; when the high-voltage parallel cables do not meet the preset imbalance requirements, the laying method is corrected by reducing the parallel cable reactance. The present invention covers different application scenarios of new lines and modified lines, and can flexibly adopt different laying methods according to the existing available space, and adjust the current carrying capacity imbalance by reducing the joint reactance, which effectively increases the transmission capacity and improves the transmission efficiency and safety.

[0155] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. It is particularly pointed out that for those skilled in the art, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for laying high voltage parallel cables, characterized in that: include: Determine the construction form of high-voltage parallel cables according to construction requirements; Conducting geophysical exploration of the high-voltage parallel cables according to the construction form, and determining the laying space of the high-voltage parallel cables according to the geophysical exploration results based on three-dimensional technology; Comparing the laying space with preset specification requirements to determine the laying method of the high-voltage parallel cable; Based on the laying method and the construction requirements, the high-voltage parallel cable is simulated to obtain the cable current carrying capacity of several sub-loops of the high-voltage parallel cable; Based on the cable current carrying capacity of each sub-circuit, determining whether the high-voltage parallel cable meets the preset unbalance requirement; When the high-voltage parallel cables do not meet the preset unbalance requirement, the laying method is corrected by reducing the parallel cable reactance.

2. The method for laying high-voltage parallel cables according to claim 1, characterized in that: The construction form of the high-voltage parallel cable is determined according to the construction requirements, specifically: Determine the line category to which the high-voltage parallel cable belongs by analyzing the construction requirements; When the line to which the high-voltage parallel cable belongs is a newly built line, determining the construction form of the high-voltage parallel cable to be a new cable construction; When the line to which the high-voltage parallel cable belongs is an existing line, it is determined that the construction form of the high-voltage parallel cable is cable reconstruction.

3. The method for laying high-voltage parallel cables according to claim 2, characterized in that: The method of conducting geophysical exploration on the high-voltage parallel cables according to the construction form and determining the laying space of the high-voltage parallel cables according to the geophysical exploration results based on three-dimensional technology includes: When the construction form of the high-voltage parallel cable is a new cable construction, determining the construction location of the high-voltage parallel cable according to the construction requirements; Conducting geophysical exploration on the construction location to generate geophysical exploration results; Based on the three-dimensional technology, determine the construction range of the high-voltage parallel cable according to the geophysical exploration results; Determine the width and height of the new cable channel within the constructible range; Based on the width and height of the newly built cable channel, the laying space of the high-voltage parallel cables is determined according to the construction requirements.

4. The method for laying high-voltage parallel cables according to claim 2, characterized in that: The method of conducting geophysical exploration on the high-voltage parallel cables according to the construction form and determining the laying space of the high-voltage parallel cables according to the geophysical exploration results based on three-dimensional technology includes: When the construction form of the high-voltage parallel cable is cable reconstruction, the construction location of the high-voltage parallel cable is determined according to the construction requirements, and existing data of the existing cable channel is obtained; Conducting geophysical exploration on the construction location to generate geophysical exploration results; Based on the three-dimensional technology, according to the existing data of the existing cable channel and the geophysical exploration results, determine the width and height of the existing cable channel, and the laying position of the existing cables in the existing cable channel; Determining the remaining space of the existing cable channel based on the width and height of the existing cable channel and the laying positions of the existing cables in the existing cable channel; Based on the remaining space of the existing cable channel, the laying space of the high-voltage parallel cable is determined according to the construction requirements.

5. The method for laying high voltage parallel cables according to claim 3 or 4, characterized in that: The laying space is compared with the preset specification requirements to determine the laying method of the high-voltage parallel cable, specifically: Determining respectively the preset triangular specification requirements and the preset horizontal specification requirements in the preset specification requirements; Compare the laying space with the preset herringbone specification requirements; When the laying space meets the preset herringbone-shaped specification requirements, determining that the laying mode of the high-voltage parallel cable is a herringbone-shaped laying mode; When the laying space does not meet the preset herringbone specification requirements, comparing the laying space with the preset horizontal specification requirements; When the laying space meets the preset horizontal specification requirements, it is determined that the laying method of the high-voltage parallel cable is horizontal laying.

6. The method for laying high-voltage parallel cables according to claim 5, characterized in that: Based on the laying method and the construction requirements, the high-voltage parallel cable is simulated to obtain the cable current carrying capacity of several sub-loops of the high-voltage parallel cable, which is specifically: Based on the laying method and the construction requirements, the high-voltage parallel cable is simulated to obtain a simulated high-voltage parallel cable; Current transmission simulation processing is performed on several sub-loops in the simulated high-voltage parallel cable to obtain the cable current carrying capacity of each sub-loop of the high-voltage parallel cable.

7. The method for laying high voltage parallel cables according to claim 6, characterized in that: The determining whether the high-voltage parallel cable meets the preset unbalance requirement based on the cable current carrying capacity of each sub-circuit is specifically as follows: Calculate the difference in the current carrying capacity of the cables between the sub-circuits, and compare the calculated difference in the current carrying capacity of each cable with a preset difference threshold; When there is a cable current carrying capacity difference greater than the preset difference threshold, it is determined that the high-voltage parallel cable does not meet the preset unbalance requirement.

8. The method for laying high-voltage parallel cables according to claim 7, characterized in that: When the high-voltage parallel cable does not meet the preset unbalance requirement, the laying method is corrected by reducing the parallel cable reactance, specifically: When the construction form of the high-voltage parallel cable is a new cable, based on the laying method of the high-voltage parallel cable, a plurality of magnetic shielding boxes are added to the laying space of the high-voltage parallel cable.

9. The method for laying high-voltage parallel cables according to claim 7, characterized in that: When the high-voltage parallel cable does not meet the preset unbalance requirement, the laying method is corrected by reducing the parallel cable reactance, specifically: When the construction form of the high-voltage parallel cable is cable reconstruction, the high-voltage parallel cable is wound with magnetic shielding material based on the laying method of the high-voltage parallel cable.

10. A high voltage parallel cable laying device, characterized in that: include: Construction form determination module, laying space determination module, laying method determination module, data collection module, imbalance judgment module and laying method correction module; The construction form determination module is used to determine the construction form of the high-voltage parallel cable according to the construction requirements; The laying space determination module is used to perform geophysical exploration on the high-voltage parallel cables according to the construction form, and determine the laying space of the high-voltage parallel cables according to the geophysical exploration results based on three-dimensional technology; The laying mode determination module is used to compare the laying space with the preset specification requirements to determine the laying mode of the high-voltage parallel cable; The data acquisition module is used to simulate the high-voltage parallel cable based on the laying method and the construction requirements to obtain the cable current carrying capacity of several sub-loops of the high-voltage parallel cable; The imbalance judgment module is used to judge whether the high-voltage parallel cable meets the preset imbalance requirement based on the cable current carrying capacity of each sub-loop; The laying mode correction module is used to correct the laying mode by reducing the parallel cable reactance when the high-voltage parallel cable does not meet the preset imbalance requirement.

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