A power supply system for long-distance water conveyance projects

Abstract

The present invention provides a power supply system for a long-distance water conveyance project, belonging to the technical fields of water conservancy and new energy. The power supply system includes a first central switch station, a second central switch station, a main power supply line, a plurality of load water conservancy facilities, and at least one solar photovoltaic module. The first central switch station and the second central switch station are arranged at intervals, and the main power supply line is connected between the first central switch station and the second central switch station. The plurality of load water conservancy facilities are arranged at intervals between the first central switch station and the second central switch station, and each load water conservancy facility is electrically connected to the main power supply line through a first connection component. The first connection component includes a first switch, a second switch, and a third switch arranged in a triangle. The solar photovoltaic module is arranged between two adjacent load water conservancy facilities and is electrically connected to the main power supply line. The power supply system for the long-distance water conveyance project can improve the power supply reliability.

Description

Technical Field

[0001] The present invention relates to the technical fields of water conservancy and new energy, and particularly relates to a power supply system for a long-distance water conveyance project. Background Art

[0002] Generally, multiple sluice stations and pumping stations are arranged along a long-distance water conveyance project. Some of the above sluice stations and pumping stations have functions such as flood control. There are hundreds of water conservancy facilities such as water diversion outlets, drainage sluices, inverted siphon outlets, pumping stations, and sluice stations along the line that need to be powered, and a large part of these facilities require dual power supplies.

[0003] In the related art, in order to ensure the power supply of the above water conservancy facilities, a dedicated 35 kV line is often set up along the line to ensure power supply, and a central switch station is set at a suitable position to connect to the surrounding power sources. When power is supplied in the above manner, dozens of water conservancy facilities are often arranged between two central switch stations, and the π connection method is used to access the 35 kV line, so as to achieve dual power supply.

[0004] Since there are many water conservancy facilities connected to the dedicated line in sequence between two central switch stations, if two water conservancy facilities or the lines connected to two water conservancy facilities fail at the same time, other water conservancy facilities between the two water conservancy facilities may lose the power supply, there is a hidden danger that a large number of water conservancy facilities on the water conveyance line cannot operate normally, and the power supply reliability is poor. Summary of the Invention

[0005] An embodiment of the present invention provides a power supply system for a long-distance water conveyance project, which can ensure the normal power supply of other water conservancy facilities between two central switch stations while an individual load water conservancy facility or line between the two central switch stations fails, and improve the power supply reliability. The technical solution is as follows:

[0006] An embodiment of the present invention provides a power supply system for a long-distance water conveyance project, and the power supply system includes: a first central switch station, a second central switch station, a main power supply line, a plurality of load water conservancy facilities, and at least one solar photovoltaic module.

[0007] The first central switch station and the second central switch station are arranged at intervals along the extension direction of the long-distance water conveyance project line. One end of the main power supply line is electrically connected to the first central switch station, and the other end of the main power supply line is electrically connected to the second central switch station;

[0008] The multiple load water conservancy facilities are arranged at intervals along the extension direction of the main power supply line between the first central switch station and the second central switch station. Each load water conservancy facility is electrically connected to the main power supply line through a first connection component. The first connection component includes a first switch, a second switch, and a third switch arranged in a triangle. One end of the first switch and one end of the second switch are electrically connected to the main power supply line and are arranged at intervals from each other. The other ends of the first switch and the second switch converge with each other and are electrically connected to the load water conservancy facility. The third switch is arranged on the main power supply line and is located between one end of the first switch and one end of the second switch.

[0009] The solar photovoltaic module is arranged between two adjacent load water conservancy facilities and is electrically connected to the main power supply line.

[0010] Optionally, the solar photovoltaic module is electrically connected to the main power supply line through a second connection component. The second connection component includes a fourth switch, a fifth switch, and a sixth switch arranged in a triangle. One end of the fourth switch and one end of the fifth switch are electrically connected to the main power supply line and are arranged at intervals from each other. The other ends of the fourth switch and the fifth switch converge with each other and are electrically connected to the load water conservancy facility. The sixth switch is arranged on the main power supply line and is located between one end of the fourth switch and one end of the fifth switch.

[0011] Optionally, the power supply system further includes a first transformer. One end of the first transformer is electrically connected to the load water conservancy facility, and the other end of the first transformer is electrically connected to the other end of the first switch and the other end of the second switch.

[0012] Optionally, the first switch, the second switch, and the third switch are circuit breakers, and the fourth switch, the fifth switch, and the sixth switch are fuses.

[0013] Optionally, the solar photovoltaic module includes multiple solar panels, and the multiple solar panels are evenly arranged at intervals along the extension direction of the long-distance water conveyance project line.

[0014] Optionally, the solar photovoltaic module further includes a power conversion component. The power conversion component includes an inverter and a second transformer. The inverter is electrically connected to the multiple solar panels. One end of the second transformer is electrically connected to the inverter, and the other end of the second transformer is electrically connected to the main power supply line.

[0015] Optionally, the other end of the second transformer is electrically connected to the adjacent load water conservancy facility.

[0016] Optionally, the power supply system further includes a storage battery, which is electrically connected to the plurality of solar panels.

[0017] Optionally, the power supply voltage of the main power supply line is 35 kV.

[0018] Optionally, the load water conservancy facilities include, but are not limited to, water diversion outlets, water discharge sluices, inverted siphon outlets, pumping stations or sluice stations.

[0019] The beneficial effects brought by the technical solution provided by the embodiment of the present invention at least include:

[0020] By respectively connecting the surrounding power sources through the first central switch station and the second central switch station arranged on the long-distance water conveyance project line, and simultaneously supplying power to the main power supply line connected between the first central switch station and the second central switch station. A plurality of load water conservancy facilities arranged between the first central switch station and the second central switch station are all connected to the main power supply line through the first connection components. When the power supply system is operating normally, the line where the first switch in each first connection component is located receives the electric energy transmitted by the first central switch station, and the line where the second switch is located receives the electric energy transmitted by the second central switch station. The electric energy passing through the first switch and the second switch finally converges and is input into the load water conservancy facilities, realizing dual power supply for the load water conservancy facilities. The solar photovoltaic modules located between two adjacent load water conservancy facilities can convert light energy into electric energy through the photovoltaic effect, and transmit the converted electric energy into the main power supply line, realizing auxiliary power supply for the load water conservancy facilities connected to the main power supply line.

[0021] When the power supply system is abnormal, for the faults occurring in individual load water conservancy facilities, the first switch and the second switch in the first connection component corresponding to the faulty load water conservancy facility can be cut off to disconnect the electrical connection between the faulty load water conservancy facility and the main power supply line, while the third switch remains closed to ensure the conduction of the main power supply line. For the fault in a certain section of the main power supply line, the connection between the first connection component adjacent to the corresponding section and the main power supply line can be cut off, and power supply can be carried out by using one of the first central switch station and the second central switch station and at least one solar photovoltaic module, or only by at least one solar photovoltaic module for the load water conservancy facilities. Realize that while individual load water conservancy facilities or lines between the first central switch station and the second central switch station fail, ensure the normal power supply of other load water conservancy facilities and improve the power supply reliability. Description of the Drawings

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0023] Figure 1 It is a schematic structural diagram of a power supply system for a long-distance water conveyance project provided by an embodiment of the present invention;

[0024] Figure 2 It is a partial structural schematic diagram of a first connection component provided by an embodiment of the present invention;

[0025] Figure 3 It is a partial structural schematic diagram of a second connection component provided by an embodiment of the present invention;

[0026] Figure 4 It is a partial structural schematic diagram of a power supply system for a long-distance water conveyance project provided by an embodiment of the present invention. Detailed implementation manners

[0027] To make the purpose, technical solutions and advantages of the present invention clearer, the following will further describe the embodiments of the present invention in detail with reference to the drawings.

[0028] In the related art, in order to ensure the power supply of the above-mentioned water conservancy facilities, a dedicated 35 kV line is often set up along the line to ensure power supply, and a central switching station is set up at a suitable position to connect to the surrounding power sources. When power supply is carried out in the above manner, dozens of water conservancy facilities are often arranged between two central switching stations, and the π connection method is used to access the 35 kV line, so as to achieve dual power supply.

[0029] Since there are many water conservancy facilities connected to the dedicated line in sequence between two central switching stations, if two water conservancy facilities or the lines connected to two water conservancy facilities fail at the same time, other water conservancy facilities between the two water conservancy facilities may lose the power supply, resulting in the hidden danger that a large number of water conservancy facilities on the water conveyance line cannot operate normally, and the power supply reliability is poor.

[0030] Figure 1 It is a schematic structural diagram of a power supply system for a long-distance water conveyance project provided by an embodiment of the present invention. Figure 2 It is a partial structural schematic diagram of a first connection component provided by an embodiment of the present invention. Figure 3 It is a partial structural schematic diagram of a second connection component provided by an embodiment of the present invention. Figure 4 It is a partial structural schematic diagram of a power supply system for a long-distance water conveyance project provided by an embodiment of the present invention. As Figures 1 to 4As shown, through practice, the applicant provides a power supply system for a long-distance water conveyance project, including a first central switch station 1, a second central switch station 2, a main power supply line 3, a plurality of load water conservancy facilities 4, and at least one solar photovoltaic module 5.

[0031] Among them, the first central switch station 1 and the second central switch station 2 are arranged at intervals along the extension direction of the long-distance water conveyance project line m. One end of the main power supply line 3 is electrically connected to the first central switch station 1, and the other end of the main power supply line 3 is electrically connected to the second central switch station 2.

[0032] A plurality of load water conservancy facilities 4 are arranged at intervals between the first central switch station 1 and the second central switch station 2 along the extension direction of the main power supply line 3. Each load water conservancy facility 4 is electrically connected to the main power supply line 3 through a first connection component 6. The first connection component 6 includes a first switch 61, a second switch 62, and a third switch 63 arranged in a triangle. One end of the first switch 61 and one end of the second switch 62 are electrically connected to the main power supply line 3 and are arranged at intervals from each other. The other end of the first switch 61 and the other end of the second switch 62 are gathered together and electrically connected to the load water conservancy facility 4. The third switch 63 is arranged on the main power supply line 3 and is located between one end of the first switch 61 and one end of the second switch 62.

[0033] The solar photovoltaic module 5 is arranged between two adjacent load water conservancy facilities 4 and is electrically connected to the main power supply line 3.

[0034] In the embodiment of the present invention, the first central switch station 1 and the second central switch station 2 arranged on the long-distance water conveyance project line m respectively draw power from the surrounding power sources and simultaneously supply power to the main power supply line 3 connected between the first central switch station 1 and the second central switch station 2. A plurality of load water conservancy facilities 4 arranged between the first central switch station 1 and the second central switch station 2 are all connected to the main power supply line 3 through the first connection component 6. When the power supply system is operating normally, the first switch 61, the second switch 62, and the third switch 63 in each first connection component 6 are all closed and energized. Among them, the lines where the first switch 61 and the second switch 62 are located are arranged in a triangle with the main power supply line 3. The line where the first switch 61 is located is close to the first central switch station 1 and can receive the electric energy transmitted by the first central switch station 1, while the line where the second switch 62 is located is close to the second central switch station 2 and can receive the electric energy transmitted by the second central switch station 2. The electric energy passing through the first switch 61 and the second switch 62 is finally converged and input into the load water conservancy facility 4 to realize dual power supply for the load water conservancy facility 4. The solar photovoltaic module 5 located between two adjacent load water conservancy facilities 4 can convert light energy into electric energy through the photovoltaic effect and transmit the converted electric energy into the main power supply line 3 to realize auxiliary power supply for the load water conservancy facility 4 connected to the main power supply line 3.

[0035] Exemplarily, as Figure 1 shown, in the embodiment of the present disclosure, three load water conservancy facilities 4 are arranged between the first central switch station 1 and the second central switch station 2, and a solar photovoltaic module 5 is arranged between every two adjacent load water conservancy facilities 4. The access of the three load water conservancy facilities 4 and the two solar photovoltaic modules 5 divides the main power supply line into a first section 3a, a second section 3b, a third section 3c, a fourth section 3d, a fifth section 3e, and a sixth section 3f in sequence.

[0036] When an abnormality occurs in the power supply system, for example, when an individual load water conservancy facility 4 among multiple load water conservancy facilities 4 fails, by cutting off the first switch 61 and the second switch 62 in the first connection component 6 corresponding to the failed load water conservancy facility 4, the electrical connection between the load water conservancy facility 4 and the main power supply line 3 is disconnected, while the third switch 63 remains closed to ensure the conduction of the main power supply line 3. It realizes that while the load water conservancy facility 4 is powered off for repair, the main power supply line 3 can still supply dual power to other load water conservancy facilities 4 at the same time; when a fault occurs at a certain place in the main power supply line 3, when the first section 3a of the main power supply line 3 fails, the first switch 61 and the third switch 63 in the first connection component 6 corresponding to the load water conservancy facility 4 closest to the first central switch station 1 can be disconnected. At this time, although the main power supply line 3 loses the power supply from the first central switch station 1, multiple load water conservancy facilities 4 can still receive the electric energy provided by the second central switch station 2 and at least one solar photovoltaic module 5 to ensure normal operation; when two faults occur in the main power supply line 3, for example, when the first section 3a and the fifth section 3e of the main power supply line 3 fail, the first switch 61 and the third switch 63 in the first connection component 6 corresponding to the load water conservancy facility 4 closest to the first central switch station 1, and the first switch 61 and the third switch 63 in the first connection component 6 corresponding to the load water conservancy facility 4 closest to the second central switch station 2 can be disconnected. At this time, the main power supply line between the first section 3a and the fifth section 3e loses the power supply from both the first central switch station 1 and the second central switch station 2 at the same time, but the two load water conservancy facilities 4 located between the first section 3a and the fifth section 3e and the two solar photovoltaic modules 5 will form a local microgrid. Due to the characteristics of low power consumption load and low power consumption frequency of the load water conservancy facilities 4, the electric energy generated by the two solar photovoltaic modules 5 can be used to ensure the normal power supply to the two load water conservancy facilities 4 and ensure normal operation. It realizes that while individual load water conservancy facilities or lines between the first central switch station and the second central switch station fail, the normal power supply to other load water conservancy facilities is ensured, and the power supply reliability is improved.

[0037] It should be noted that, as Figure 1The embodiment in which three load water conservancy facilities 4 are provided between the first central switch station 1 and the second central switch station 2 is only an example. In other possible implementation manners, four, five or more load water conservancy facilities 4 may be provided between the first central switch station 1 and the second central switch station 2 according to the actual plan, and the present disclosure does not limit this.

[0038] Optionally, the supply voltage of the main power supply line 3 is 35 kV. Exemplarily, the supply voltages of long-distance power supply lines generally include two types: 10 kV and 35 kV. In the embodiment of the present invention, by adopting the main power supply line 3 with a supply voltage of 35 kV, compared with the 10 kV line, at the same power, the current passing through the line is smaller, the power loss during long-distance transmission is also smaller, and the safety is higher, which can further improve the power supply reliability of the power supply system.

[0039] Optionally, the solar photovoltaic module 5 is electrically connected to the main power supply line 3 through the second connection component 7. The second connection component 7 includes a fourth switch 71, a fifth switch 72 and a sixth switch 73 arranged in a triangle. One end of the fourth switch 71 and one end of the fifth switch 72 are electrically connected to the main power supply line 3 and are arranged at intervals from each other. The other end of the fourth switch 71 and the other end of the fifth switch 72 are gathered together and electrically connected to the load water conservancy facility 4. The sixth switch 73 is arranged on the main power supply line 3 and is located between one end of the fourth switch 71 and one end of the fifth switch 72. Exemplarily, in the embodiment of the present invention, the solar photovoltaic module 5 is connected to the main power supply line 3 through the second connection component 7. When the photovoltaic module 5 fails, the fourth switch 71 and the fifth switch 72 can be disconnected to disconnect the electrical connection between the solar photovoltaic module 5 and the main power supply line 3, while the sixth switch 73 remains closed to ensure the conduction of the main power supply line 3. While the faulty solar photovoltaic module 5 is being powered off for repair, it is ensured that the main power supply line 3 can still supply dual power to other load water conservancy facilities 4 at the same time. When a section of the main power supply line 3 between the solar photovoltaic module 5 and the adjacent load water conservancy facility 4 fails, the solar photovoltaic module 5 can also be disconnected from the faulty section of the main power supply line 3 by disconnecting the fourth switch 71 and the sixth switch 73, or disconnecting the fifth switch 72 and the sixth switch 73, while ensuring the normal power supply of other sections of the main power supply line 3, further improving the power supply reliability of the power supply system.

[0040] Optionally, the power supply system further includes a first transformer 8. One end of the first transformer 8 is electrically connected to the load water conservancy facility 4, and the other end of the first transformer 8 is electrically connected to the other end of the first switch 61 and the other end of the second switch 62. Exemplarily, in the embodiment of the present invention, by providing the first transformer 8 between the load water conservancy facility 4 and the first connection assembly 6, the voltage of the 35 kV high-voltage alternating current input by the main power supply line 3 can be step-down adjusted for different load water conservancy facilities 4 to match the rated operating voltage of the load water conservancy facility 4, further improving the power supply reliability of the power supply system.

[0041] Optionally, the first switch 61, the second switch 62 and the third switch 63 are circuit breakers, and the fourth switch 71, the fifth switch 72 and the sixth switch 73 are fuses. Exemplarily, the protection method of the circuit breaker is to trip, and the power supply can be restored by closing the switch after the fault is excluded. The protection method of the fuse is to melt, and the fuse element needs to be replaced to restore the power supply after the fault is excluded. The tripping speed of the circuit breaker is in milliseconds, while the fusing speed of the fuse is in microseconds, and its disconnection speed is faster than that of the circuit breaker. In the present invention, different switch types are selected for different power supply and transmission lines to facilitate differentiation during assembly, maintenance and replacement. In other possible implementation manners, the types of fuses and circuit breakers can also be used interchangeably, and the present invention does not limit this.

[0042] Optionally, the solar photovoltaic module 5 includes a plurality of solar panels 51, and the plurality of solar panels 51 are evenly spaced along the extension direction of the long-distance water conveyance project line m. Exemplarily, in the embodiment of the present invention, the solar photovoltaic module 5 utilizes a plurality of solar panels 51 arranged along the long-distance water conveyance project line m, that is, along the water conveyance main canal, to contact sunlight, and converts light energy into electrical energy by the photovoltaic effect to supply power to the main power supply line 3. By arranging the plurality of solar panels 51 evenly spaced along the extension direction of the long-distance water conveyance project line m, the space along the long-distance water conveyance project line m is fully utilized, the coverage rate of the solar panels 51 is higher, more electrical energy can be generated, and the power supply reliability of the power supply system is further improved.

[0043] Optionally, the solar photovoltaic module 5 further includes a power conversion module 52, which includes an inverter 521 and a second transformer 522. The inverter 521 is electrically connected to multiple solar panels 51. One end of the second transformer 522 is electrically connected to the inverter 521, and the other end of the second transformer 522 is electrically connected to the main power supply line 3. Exemplarily, in the embodiment of the present invention, by providing the power conversion module 52, the direct current generated by the solar panels 52 can be converted into low-voltage alternating current by the inverter 521, and then the second transformer 522 is used to boost the low-voltage alternating current to high-voltage alternating current. The boosted high-voltage alternating current can be directly used for various electrical equipment along the water conveyance project line m. Or it can be directly connected to the main power supply line 3 for transmission to assist in power supply for the load water conservancy facilities 4, further improving the power supply reliability of the power supply system.

[0044] Optionally, the other end of the second transformer 522 is electrically connected to the adjacent load water conservancy facilities 4. Exemplarily, in the embodiment of the present invention, by electrically connecting the other end of the second transformer 522 to the load water conservancy facilities 4, when a fault occurs in the main power supply line 3 between the solar photovoltaic module 5 and the adjacent load water conservancy facilities, the electric energy generated by the solar photovoltaic module 5 can be directly boosted by the second transformer 522 and conducted to the adjacent load water conservancy facilities 4 for emergency power supply to avoid power outage, further improving the power supply reliability of the power supply system.

[0045] Optionally, the power supply system further includes a storage battery 53, which is electrically connected to multiple solar panels 51. Exemplarily, in the embodiment of the present invention, after converting light energy into electrical energy by multiple solar panels 51, part of the converted direct current can be stored by the storage battery 53. When a fault occurs in the main power supply line 3 between the solar photovoltaic module 5 and the adjacent load water conservancy facilities, and the load water conservancy facilities 4 lack power supply, the storage battery 53 storing power can be transported to the vicinity of the load water conservancy facilities 4 for emergency power supply, further improving the power supply reliability of the power supply system.

[0046] Optionally, the load water conservancy facilities 4 include but are not limited to water diversion outlets, water discharge sluices, inverted siphon outlets, pumping stations or sluice stations. Exemplarily, in the embodiment of the present invention, the long-distance water conveyance project line m conducts long-distance scheduling of water resources through an artificial water conveyance main canal. The load water conservancy facilities 4 in the present invention are the water diversion outlets, water discharge sluices, inverted siphon outlets, pumping stations or sluice stations and other electrical load devices arranged on the artificial water conveyance main canal line, realizing the diversion, truncation, guidance and storage of the water flow in the artificial water conveyance main canal.

[0047] Unless otherwise defined, technical terms or scientific terms used herein shall have the ordinary meanings as understood by those of ordinary skill in the art to which this invention pertains. The terms "first", "second" and similar terms used in the description and claims of this patent application for invention do not denote any order, quantity or importance, but are only used to distinguish different components. Similarly, terms such as "a" or "an" do not denote a limitation of quantity, but rather indicate the presence of at least one. The terms "comprising" or "including" and similar terms mean that the elements or items appearing before "comprising" or "including" cover the elements or items listed after "comprising" or "including" and their equivalents, and do not exclude other elements or items. The terms "connected" or "coupled" and similar terms are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms "upper", "lower", "left", "right" etc. are only used to indicate relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationships may also change accordingly.

[0048] The above are only optional embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A power supply system for a long-distance water conveyance project, characterized in that, Including: A first central switch station (1), a second central switch station (2), a main power supply line (3), a plurality of load water conservancy facilities (4), and at least one solar photovoltaic module (5). The first central switch station (1) and the second central switch station (2) are arranged at intervals along the extension direction of the long-distance water conveyance project line (m). One end of the main power supply line (3) is electrically connected to the first central switch station (1), and the other end of the main power supply line (3) is electrically connected to the second central switch station (2). The plurality of load water conservancy facilities (4) are arranged at intervals along the extension direction of the main power supply line (3) between the first central switch station (1) and the second central switch station (2). Each load water conservancy facility (4) is electrically connected to the main power supply line (3) through a first connection component (6). The first connection component (6) includes a first switch (61), a second switch (62), and a third switch (63) arranged in a triangle. One end of the first switch (61) and one end of the second switch (62) are electrically connected to the main power supply line (3) and are arranged at intervals from each other. The other end of the first switch (61) and the other end of the second switch (62) converge with each other and are electrically connected to the load water conservancy facility (4). The third switch (63) is arranged on the main power supply line (3) and is located between one end of the first switch (61) and one end of the second switch (62). The solar photovoltaic module (5) is arranged between two adjacent load water conservancy facilities (4) and is electrically connected to the main power supply line (3). The solar photovoltaic module (5) is electrically connected to the main power supply line (3) through a second connection component (7). The second connection component (7) includes a fourth switch (71), a fifth switch (72), and a sixth switch (73) arranged in a triangle. One end of the fourth switch (71) and one end of the fifth switch (72) are electrically connected to the main power supply line (3) and are arranged at intervals from each other. The other end of the fourth switch (71) and the other end of the fifth switch (72) converge with each other and are electrically connected to the load water conservancy facility (4). The sixth switch (73) is arranged on the main power supply line (3) and is located between one end of the fourth switch (71) and one end of the fifth switch (72).

2. The power supply system for long-distance water conveyance project according to claim 1, wherein The power supply system further includes a first transformer (8). One end of the first transformer (8) is electrically connected to the load water conservancy facility, and the other end of the first transformer (8) is electrically connected to the other end of the first switch (61) and the other end of the second switch (62).

3. The power supply system for long-distance water conveyance project according to claim 1, wherein, The first switch (61), the second switch (62), and the third switch (63) are circuit breakers, and the fourth switch (71), the fifth switch (72), and the sixth switch (73) are fuses.

4. The power supply system for long-distance water conveyance projects according to any one of claims 1 to 3, characterized in that, The solar photovoltaic module (5) includes a plurality of solar panels (51), and the plurality of solar panels (51) are evenly arranged at intervals along the extension direction of the long-distance water conveyance project line (m).

5. The power supply system for long-distance water conveyance project according to claim 4, wherein The solar photovoltaic module (5) further includes a power conversion module (52), and the power conversion module (52) includes an inverter (521) and a second transformer (522). The inverter (521) is electrically connected to the multiple solar panels (51), one end of the second transformer (522) is electrically connected to the inverter (521), and the other end of the second transformer (522) is electrically connected to the main power supply line (3).

6. The power supply system for long-distance water conveyance project according to claim 5, characterized in that, The other end of the second transformer (522) is electrically connected to the adjacent load water conservancy facility (4).

7. The power supply system for long-distance water conveyance project according to claim 4, wherein The power supply system further includes a storage battery (53), and the storage battery (53) is electrically connected to the multiple solar panels (51).

8. The power supply system for long-distance water conveyance projects according to any one of claims 1 to 3, characterized in that, The supply voltage of the main power supply line (3) is 35 kV.

9. The power supply system for long-distance water conveyance projects according to any one of claims 1 to 3, characterized in that The load water conservancy facility (4) includes, but is not limited to, a water diversion outlet, a water discharge sluice, an inverted siphon outlet, a pumping station or a sluice station.

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