A power distribution efficiency system based on superconducting cable

Abstract

The application provides a power distribution efficiency increasing system based on a superconducting cable, which comprises a transformer substation, a plurality of superconducting transmission assemblies, a second bus and a power distribution module; the transformer substation comprises a plurality of voltage conversion units and a first bus; the first end of the voltage conversion unit is connected with the first bus, and the second end is connected with the second bus; the superconducting transmission assembly comprises a first normally closed switch, a superconducting cable and a second normally closed switch, which are connected in sequence; the first end of the first normally closed switch is an assembly input end and is connected with the second bus; the second end of the second normally closed switch is a superconducting transmission assembly output end and is connected with the first end of the power distribution module; the second end of the power distribution module is connected with a power consumption side load and is used for supplying power for the power consumption side load. Compared with the prior art, the superconducting cable with a low voltage level is used to replace the conventional cable with a high voltage level, the capacity and safety of the power distribution line are improved, and the construction cost of the load side step-down transformer substation is effectively reduced.

Description

Technical Field

[0001] This invention relates to the field of power grid transmission and distribution, and in particular to a power distribution efficiency enhancement system based on superconducting cables. Background Technology

[0002] Against the backdrop of rapid growth in urban electricity consumption and increasingly strained urban power supply, the planning and construction of power distribution networks encounters problems such as limited transmission line access, insufficient substation outgoing line spacing, and excessive losses in transmission and distribution lines. Current technology mainly employs 110kV distribution, configuring high-voltage transformers on the consumer side. However, this method carries certain risks, requires a large land area, suffers high energy losses, and is prone to insufficient outgoing line spacing. Summary of the Invention

[0003] This invention provides a power distribution efficiency enhancement system based on superconducting cables, which can transmit more electrical energy in the same outgoing line interval and has higher safety.

[0004] To address the aforementioned technical problems, embodiments of the present invention provide a power distribution efficiency enhancement system based on superconducting cables, comprising a substation, several superconducting transmission components, a second busbar, and a power distribution module; wherein,

[0005] The substation includes several transformer conversion units and a first busbar;

[0006] The transformer conversion unit is used to convert the first voltage of the first bus to the second voltage of the second bus. The first end of the transformer conversion unit is connected to the first bus of the substation, and the second end of the transformer conversion unit is connected to the second bus. The first voltage is greater than the second voltage.

[0007] Each of the superconducting transmission components includes a superconducting cable, a first normally closed switch, and a second normally closed switch; wherein, the first terminal of the first normally closed switch is the input terminal of the superconducting transmission component and is connected to the second busbar; the second terminal of the first normally closed switch is connected to the first terminal of the superconducting cable; the second terminal of the second normally closed switch is the output terminal of the superconducting transmission component and is connected to the first terminal of the power distribution module; the first terminal of the second normally closed switch is connected to the second terminal of the superconducting cable.

[0008] The second terminal of the power distribution module is connected to the load on the power consumption side and is used to supply power to the load on the power consumption side.

[0009] As a preferred embodiment, the transformer conversion unit includes a main transformer, a third normally closed switch, and a fourth normally closed switch; wherein,

[0010] The high-voltage end of the main transformer is the first end of the transformer conversion unit and is connected to the first busbar; the low-voltage end of the main transformer is connected to the first end of the third normally closed switch and the first end of the fourth normally closed switch, respectively.

[0011] The second end of the transformer conversion unit includes the second end of the third normally closed switch and the second end of the fourth normally closed switch; the second end of the third normally closed switch and the second end of the fourth normally closed switch are respectively connected to the second busbars of two adjacent sections.

[0012] As a preferred embodiment, the second end of the third normally closed switch is also connected to one of the superconducting transmission components via the second bus; the second end of the fourth normally closed switch is also connected to another of the superconducting transmission components via the second bus.

[0013] As a preferred embodiment, the second busbar is provided with a plurality of first normally open switches, which are located on the second busbar connecting the second ends of two adjacent transformer conversion units.

[0014] As a preferred embodiment, the power distribution module includes several power distribution units and several second normally open switches; wherein,

[0015] Each power distribution unit corresponds to a superconducting transmission component and includes a power distribution bus section and at least one fifth normally closed switch. Adjacent power distribution units are connected through the power distribution bus section. The first end of each of the at least one fifth normally closed switch is connected to the power distribution bus section, and the second section of each of the at least one fifth normally closed switch is connected to the load on the power consumption side. A second normally open switch is provided between each pair of adjacent power distribution bus sections.

[0016] As a preferred embodiment, a plurality of third normally open switches are also provided on the first busbar, wherein the third normally open switches are provided on the first busbar connecting the first ends of two adjacent transformer conversion units.

[0017] As a preferred embodiment, the power distribution efficiency improvement system further includes a power distribution monitoring module, which includes a monitoring computer, voltage transformers corresponding to each of the superconducting transmission components, current transformers corresponding to each of the superconducting transmission components, and temperature sensors corresponding to each of the superconducting transmission components; wherein...

[0018] The voltage transformer is used to collect the voltage signal of the corresponding superconducting transmission component and send the voltage signal to the monitoring computer; the current transformer is used to collect the current signal of the corresponding superconducting transmission component and send the current signal to the monitoring computer; the temperature sensor is used to monitor the temperature signal of the corresponding superconducting transmission component and send the temperature signal to the monitoring computer.

[0019] The monitoring computer is connected to each of the voltage transformers, current transformers, and temperature sensors, and is used to receive the voltage signal, the current signal, and the temperature signal.

[0020] As a preferred embodiment, the monitoring computer is also connected to each of the first normally closed switches, each of the second normally closed switches, each of the third normally closed switches, each of the fourth normally closed switches, each of the fifth normally closed switches, each of the first normally open switches, each of the second normally open switches, and each of the third normally open switches, and controls the switching states of each of the first normally closed switches, each of the second normally closed switches, each of the third normally closed switches, each of the fourth normally closed switches, each of the fifth normally closed switches, each of the first normally open switches, each of the second normally open switches, and each of the third normally open switches.

[0021] As a preferred embodiment, the power distribution monitoring module further includes a monitoring display screen, which is used to visually display the switch status, the voltage signal, the current signal, and the temperature signal.

[0022] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0023] This invention provides a power distribution efficiency enhancement system based on superconducting cables. The system includes a substation, several superconducting transmission components, a second busbar, and a power distribution module.

[0024] The substation includes several transformer conversion units and a first busbar. Each transformer conversion unit converts a first voltage from the first busbar to a second voltage from the second busbar. The first end of each transformer conversion unit is connected to the first busbar of the substation, and the second end of each transformer conversion unit is connected to the second busbar. The first voltage is greater than the second voltage. Each superconducting transmission component includes a superconducting cable, a first normally closed switch, and a second normally closed switch. The first end of the first normally closed switch is the input end of the superconducting transmission component and is connected to the second busbar. The second end of the first normally closed switch is connected to the first end of the superconducting cable. The second end of the second normally closed switch is the output end of the superconducting transmission component and is connected to the first end of the power distribution module. The first end of the second normally closed switch is connected to the second end of the superconducting cable. The second end of the power distribution module is connected to the load on the power consumption side and is used to supply power to the load on the power consumption side. Compared to existing technologies, replacing high-voltage conventional cables with low-voltage superconducting cables increases the capacity of power distribution lines, effectively reducing the construction cost of load-side step-down substations. At the same time, it eliminates the need for high-voltage transformers on the power consumption side, significantly improving safety. Under the same substation outgoing line bay, it results in lower energy loss, occupies less space, and can transmit more electrical energy. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of an embodiment of a power distribution efficiency enhancement system based on superconducting cables according to the present invention.

[0026] Figure 2 This is a schematic diagram illustrating an example of a power distribution efficiency enhancement system based on superconducting cables according to the present invention. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Example 1:

[0029] Please refer to Figure 1 , Figure 1 and Figure 2 A power distribution efficiency enhancement system based on superconducting cables provided in an embodiment of the present invention includes a substation 1, several superconducting transmission components 2, a second busbar 3, a power distribution module 4, and a power distribution monitoring module 5;

[0030] The substation 1 includes several transformer conversion units and a first busbar 11. The substation 1 is connected to the power distribution module 4 through a superconducting transmission component 2 and a low-voltage second busbar 3, and the power distribution module 4 supplies power to the loads on the user side.

[0031] The transformer conversion unit is used to convert the first voltage of the first bus 11 into the second voltage of the second bus 3. The first end of the transformer conversion unit is connected to the first bus 11 of the substation 1, and the second end of the transformer conversion unit is connected to the second bus 3. The first voltage is greater than the second voltage. In this embodiment, the first voltage is 110kV and the second voltage is 10kV.

[0032] Each superconducting transmission component 2 includes a superconducting cable 21, a first normally closed switch 22, and a second normally closed switch 23. The first terminal of the first normally closed switch 22 is the input terminal of the superconducting transmission component 2, connected to the 10kV low-voltage second busbar 3. The second terminal of the first normally closed switch 22 is connected to the first terminal of the superconducting cable 21. The second terminal of the second normally closed switch 23 is the output terminal of the superconducting transmission component 2, connected to the first terminal of the power distribution module 4. The first terminal of the second normally closed switch 23 is connected to the second terminal of the superconducting cable 21. In the planning and construction phase of 110kV and 10kV power distribution networks, using low-voltage superconducting cables to replace high-voltage conventional cables can fully utilize the zero resistance, large capacity, and low loss characteristics of superconducting cables. Simultaneously, using superconducting cables to construct the superconducting transmission component 2 can effectively reduce the footprint and power distribution channels, thereby reducing the number of substations needed within cities. Compared to conventional cables, it significantly improves the transmission efficiency of power distribution channels. On the other hand, with the same substation outgoing line spacing, the use of superconducting cables can transmit more electrical energy over a longer distance, which is of great significance for improving the power grid structure.

[0033] In this embodiment, the transformer conversion unit includes a main transformer 12, a third normally closed switch 13, and a fourth normally closed switch 14; wherein,

[0034] The high-voltage end of the main transformer 12 is the first end of the transformer conversion unit and is connected to the first busbar 11; the low-voltage end of the main transformer 12 is connected to the first end of the third normally closed switch 13 and the first end of the fourth normally closed switch 14, respectively.

[0035] The second end of the transformer conversion unit includes the second end of the third normally closed switch 13 and the second end of the fourth normally closed switch 14; the second end of the third normally closed switch 13 and the second end of the fourth normally closed switch 14 are respectively connected to the second busbar 3 of the two adjacent sections.

[0036] Preferably, the second end of the third normally closed switch 13 is also connected to one of the superconducting transmission components 2 via a low-voltage 10kV second busbar 3; the second end of the fourth normally closed switch 14 is also connected to another of the superconducting transmission components 2 via a low-voltage 10kV second busbar.

[0037] Preferably, a plurality of third normally open switches 15 are also provided on the first busbar 11, and the third normally open switches 15 are provided on the first busbar 11 where the first ends of two adjacent transformer conversion units are connected.

[0038] Optionally, the high-voltage end of the main transformer 12 of each transformer conversion unit, i.e., the first end of the transformer conversion unit, is connected to a 110kV high-voltage first busbar 11, and the transformer conversion units are arranged sequentially along the first busbar 11; the second end of each transformer conversion unit is connected to a 10kV low-voltage second busbar 3 and arranged sequentially, such that the same transformer conversion unit is connected to two ends of the low-voltage second busbar 3, and the first section of the low-voltage second busbar 3 and the last section of the low-voltage second busbar 3 are connected by normally open switches. Several first normally open switches 31 are provided on the second busbar 3, and the first normally open switches 31 are located on the second busbar 3 connected to the second ends of two adjacent transformer conversion units. The number of superconducting transmission components 2 is no more than the number of low-voltage second busbars 3, and each superconducting transmission component 2 is connected to different sections of the low-voltage second busbar 3.

[0039] The second terminal of the power distribution module 4 is connected to the load on the power consumption side and is used to supply power to the load on the power consumption side.

[0040] Optionally, the power distribution module 4 includes several power distribution units and several second normally open switches 41; wherein, each power distribution unit corresponds one-to-one with the superconducting transmission component 2, including a section of power distribution bus 42 and at least one fifth normally closed switch 43; adjacent power distribution units are connected through the power distribution bus 42; the first end of each of the at least one fifth normally closed switch 43 is connected to the power distribution bus 42, and the second section of each of the at least one fifth normally closed switch 43 is connected to the load on the power consumption side; a second normally open switch 41 is provided between every two adjacent sections of the power distribution bus 42.

[0041] The power distribution monitoring module 5 includes a monitoring computer, voltage transformers corresponding to each of the superconducting transmission components, current transformers corresponding to each of the superconducting transmission components, and temperature sensors corresponding to each of the superconducting transmission components; wherein...

[0042] The voltage transformer is used to collect the voltage signal of the corresponding superconducting transmission component 2 and send the voltage signal to the monitoring computer; the current transformer is used to collect the current signal of the corresponding superconducting transmission component 2 and send the current signal to the monitoring computer; the temperature sensor is used to monitor the temperature signal of the corresponding superconducting transmission component 2 and send the temperature signal to the monitoring computer.

[0043] The monitoring computer is connected to each of the voltage transformers, current transformers, and temperature sensors to receive the voltage signals, current signals, and temperature signals in real time and provide timely feedback on the working status of the superconducting transmission component 2.

[0044] Preferably, the monitoring computer is also connected to each of the first normally closed switches 22, each of the second normally closed switches 23, each of the third normally closed switches 13, each of the fourth normally closed switches 14, each of the fifth normally closed switches 43, each of the first normally open switches 31, each of the second normally open switches 41, and each of the third normally open switches 15, and controls the switching states of each of the first normally closed switches 22, each of the second normally closed switches 23, each of the third normally closed switches 13, each of the fourth normally closed switches 14, each of the fifth normally closed switches 43, each of the first normally open switches 31, each of the second normally open switches 41, and each of the third normally open switches 15, thereby realizing control over all switches.

[0045] The power distribution monitoring module 5 also includes a monitoring display screen, which is used to visually display the switching status of all switches, the voltage signal of the superconducting transmission component 2, the current signal of the superconducting transmission component 2, and the temperature signal of the superconducting transmission component 2. Thus, the power distribution efficiency enhancement system can achieve switching control of the entire system through the power distribution monitoring module 5, and monitor the superconducting transmission component 2 in real time, promptly collecting signals such as voltage, current, and temperature, providing visual display and feedback to technicians, facilitating their understanding of the overall system operating status and enabling maintenance or adjustments.

[0046] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0047] This invention provides a power distribution efficiency enhancement system based on superconducting cables. The system includes a substation, several superconducting transmission components, a second busbar, and a power distribution module.

[0048] The substation includes several transformer conversion units and a first busbar. Each transformer conversion unit converts a first voltage from the first busbar to a second voltage from the second busbar. The first end of each transformer conversion unit is connected to the first busbar of the substation, and the second end of each transformer conversion unit is connected to the second busbar. The first voltage is greater than the second voltage. Each superconducting transmission component includes a superconducting cable, a first normally closed switch, and a second normally closed switch. The first end of the first normally closed switch is the input end of the superconducting transmission component and is connected to the second busbar. The second end of the first normally closed switch is connected to the first end of the superconducting cable. The second end of the second normally closed switch is the output end of the superconducting transmission component and is connected to the first end of the power distribution module. The first end of the second normally closed switch is connected to the second end of the superconducting cable. The second end of the power distribution module is connected to the load on the power consumption side and is used to supply power to the load on the power consumption side. Compared to existing technologies, replacing high-voltage conventional cables with low-voltage superconducting cables increases the capacity of power distribution lines, effectively reducing the construction cost of load-side step-down substations. At the same time, it eliminates the need for high-voltage transformers on the power consumption side, significantly improving safety. Under the same substation outgoing line bay, it results in lower energy loss, occupies less space, and can transmit more electrical energy.

[0049] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. In particular, it should be noted that any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention for those skilled in the art.

Claims

1. A power distribution efficiency enhancement system based on superconducting cables, characterized in that, This includes a substation, several superconducting transmission components, a second busbar, and power distribution modules; among which, The substation includes several transformer conversion units and a first busbar; The transformer conversion unit is used to convert the first voltage of the first bus to the second voltage of the second bus. The first end of the transformer conversion unit is connected to the first bus of the substation, and the second end of the transformer conversion unit is connected to the second bus. The first voltage is greater than the second voltage. Each of the superconducting transmission components includes a superconducting cable, a first normally closed switch, and a second normally closed switch; wherein, the first terminal of the first normally closed switch is the input terminal of the superconducting transmission component and is connected to the second busbar; the second terminal of the first normally closed switch is connected to the first terminal of the superconducting cable; the second terminal of the second normally closed switch is the output terminal of the superconducting transmission component and is connected to the first terminal of the power distribution module; the first terminal of the second normally closed switch is connected to the second terminal of the superconducting cable. The second terminal of the power distribution module is connected to the load on the power consumption side and is used to supply power to the load on the power consumption side. The transformer conversion unit includes a main transformer, a third normally closed switch, and a fourth normally closed switch; wherein... The high-voltage end of the main transformer is the first end of the transformer conversion unit and is connected to the first busbar; the low-voltage end of the main transformer is connected to the first end of the third normally closed switch and the first end of the fourth normally closed switch, respectively. The second end of the transformer conversion unit includes the second end of the third normally closed switch and the second end of the fourth normally closed switch; the second end of the third normally closed switch and the second end of the fourth normally closed switch are respectively connected to the second busbars of two adjacent sections; The second end of the third normally closed switch is also connected to one of the superconducting transmission components via a second busbar; the second end of the fourth normally closed switch is also connected to another of the superconducting transmission components via a second busbar.

2. The power distribution efficiency enhancement system based on superconducting cables as described in claim 1, characterized in that, The second busbar is provided with a plurality of first normally open switches, which are located on the second busbar connecting the second ends of two adjacent transformer conversion units.

3. The power distribution efficiency enhancement system based on superconducting cables as described in claim 2, characterized in that, The power distribution module includes several power distribution units and several second normally open switches; wherein, Each power distribution unit corresponds to a superconducting transmission component and includes a power distribution bus and at least one fifth normally closed switch. Adjacent power distribution units are connected through the power distribution bus, and a second normally open switch is provided on the power distribution bus between adjacent power distribution units. The first end of each of the at least one fifth normally closed switch is connected to the power distribution bus, and the second section of each of the at least one fifth normally closed switch is connected to the load on the power consumption side.

4. The power distribution efficiency enhancement system based on superconducting cables as described in claim 3, characterized in that, Several third normally open switches are also provided on the first busbar, and the third normally open switches are provided on the first busbar where the first ends of two adjacent transformer conversion units are connected.

5. A power distribution efficiency enhancement system based on superconducting cables as described in claim 4, characterized in that, The power distribution efficiency improvement system further includes a power distribution monitoring module, which comprises a monitoring computer, voltage transformers corresponding to each of the superconducting transmission components, current transformers corresponding to each of the superconducting transmission components, and temperature sensors corresponding to each of the superconducting transmission components; wherein... The voltage transformer is used to collect the voltage signal of the corresponding superconducting transmission component and send the voltage signal to the monitoring computer; the current transformer is used to collect the current signal of the corresponding superconducting transmission component and send the current signal to the monitoring computer; the temperature sensor is used to monitor the temperature signal of the corresponding superconducting transmission component and send the temperature signal to the monitoring computer. The monitoring computer is connected to each of the voltage transformers, current transformers, and temperature sensors, and is used to receive the voltage signal, the current signal, and the temperature signal.

6. A power distribution efficiency enhancement system based on superconducting cables as described in claim 5, characterized in that, The monitoring computer is also connected to each of the first normally closed switches, each of the second normally closed switches, each of the third normally closed switches, each of the fourth normally closed switches, each of the fifth normally closed switches, each of the first normally open switches, each of the second normally open switches, and each of the third normally open switches, and controls the switching states of each of the first normally closed switches, each of the second normally closed switches, each of the third normally closed switches, each of the fourth normally closed switches, each of the fifth normally closed switches, each of the first normally open switches, each of the second normally open switches, and each of the third normally open switches.

7. A power distribution efficiency enhancement system based on superconducting cables as described in claim 6, characterized in that, The power distribution monitoring module also includes a monitoring display screen, which is used to visually display the switch status, voltage signal, current signal and temperature signal.

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