A chain energy internet suitable for highways and canals and a control method thereof

Abstract

The present invention provides a chain energy internet and a control method thereof applicable to highways and canals. The chain energy internet leads out high-voltage AC power supply points from the side of the highway and along the canal, and the power supply radius of the led-out high-voltage AC power supply points covers each other. At the same time, the high-voltage AC power supply points are connected one-to-one with energy substations including renewable energy, low-voltage AC power distribution cabinets, energy routers, and distributed intelligent terminals through AC transformers to form a chain energy internet. The chain energy internet and the control method thereof applicable to highways and canals adopt an AC networking power supply mode to form a systematic, modular, and standardized power supply solution, which fully meets the urgent needs of stable and reliable power supply along highways and canals.

Description

Technical Field

[0001] The present invention relates to the field of electrical engineering, and more particularly, to a chain energy internet applicable to highways and canals and a control method thereof. Background Art

[0002] With the rapid development of highway construction, the traditional centralized fixed-point power supply mode of the highway network has large capital investment and low utilization rate of the power distribution network. The existing power supply and power supply methods are difficult to meet the requirements. The contradiction between the backward power supply system along the highway and the rapidly growing decentralized power demand in the entire road area has intensified year by year. The areas along the highway network are narrow, long and remote, mostly in urban-rural fringe areas or rural areas with low power supply reliability. The current method of taking electricity nearby is difficult to meet the requirements of energy supply security and reliability of smart highway transportation information facilities. In addition, the development along the canal also needs to adapt to the requirements of rapid development of informatization. The charging demand of ships in water transportation is urgently increasing. The areas along the canal are narrow, long and remote, and face the same problems as the power supply of the highway network. Therefore, a technology is needed that can make full use of renewable energy resources along the highway and canal to serve the growing power equipment of the highway network and canal network on the spot. Summary of the invention

[0003] In order to solve the contradiction between the traditional centralized fixed-point power supply in the prior art and the rapidly growing decentralized power demand along the entire road and canal, the present invention provides a chain energy Internet applicable to highways and canals, and the chain energy Internet includes:

[0004] Several high-voltage AC power supply points are used to provide a total power supply point for the power loads on the highway side and along the canal, and the power supply radius of two adjacent high-voltage AC power supply points overlaps each other;

[0005] A plurality of AC transformers, which are connected to the high-voltage AC power supply points and the energy substations under the low-voltage AC busbars, and are used to reduce the voltage input from the high-voltage AC power supply points connected thereto. AC transformers corresponding to the number of high-voltage AC power supply points are installed between the adjacent high-voltage AC power supply points, and each AC transformer is connected to an energy substation;

[0006] The energy substation is used to connect the power loads on the highway side and the canal side and provide electrical energy to the connected power loads.

[0007] Furthermore, a high-voltage AC distribution room is configured at the front end of the AC transformer. The wiring of the high-voltage AC distribution room is simultaneously connected from two adjacent high-voltage AC power supply points, and a high-voltage circuit breaker and a bus tie switch are installed on each access line. The two lines are isolated and protected by the high-voltage circuit breaker and the bus tie switch. When one of the lines is under maintenance or fails, the high-voltage circuit breaker and the bus tie switch connected to the other normally operating line are closed to supply power to the AC transformer.

[0008] Furthermore, the chain energy Internet also includes a general coordination control unit, which is arranged near the high-voltage AC power supply point, and is used to monitor the operating status of all high-voltage AC power supply points in the chain energy network, and receive necessary data transmitted by all energy substations as agreed, and send control commands to the energy substations based on the received data to perform coordinated control within the energy substations and between energy substations.

[0009] Furthermore, the energy substation includes:

[0010] A low-voltage AC distribution cabinet, which is connected to the output line of the AC transformer and is used to provide access, metering, control and protection for the energy router and power loads;

[0011] Energy router, used to provide interconnection of AC busbars on the low-voltage side of AC transformers and access to power loads;

[0012] The distributed intelligent terminal is used to collect the operating data of the AC transformer and the AC transformer input line connected to the energy substation, other equipment in the energy substation, and the environmental data of the energy substation. Through two-way information interaction and distributed edge computing, and combined with the control strategy within the energy substation issued by the overall coordination control unit, the collected data can be analyzed and the operation control within the energy substation can be realized.

[0013] Furthermore, the energy substation also includes a clean energy and energy storage system for providing electric energy to the connected power loads, and providing emergency electric energy when the power system is temporarily interrupted and the AC power supply fails to work.

[0014] Furthermore, the energy substation also includes a power quality controller at the end of the power supply, which uses a static VAR generator, a static synchronous compensator for distribution and a static VAR compensator to control the power quality at the end of the power supply, thereby providing power supply that meets the reliability and power quality levels required by users who are sensitive to power quality.

[0015] Furthermore, the high-voltage AC power supply point is derived from a highway service area / canal service area power supply point, or is newly built along the highway / canal.

[0016] Furthermore, the power supply radius of the high-voltage AC power source point is determined according to the total power transmission capacity and the wire diameter of the cable of its transmission line, wherein, when the wire diameter margin of the cable is sufficient, the greater the total power transmission capacity, the shorter the power supply radius.

[0017] According to another aspect of the present invention, the present invention provides a method for controlling the chain energy Internet applicable to highways and canals of the present invention, the method comprising:

[0018] Step 1: Check the operating status of the main equipment in the chain energy network based on the overall coordination control unit;

[0019] Step 2: When the inspection is normal, the distributed intelligent terminal of the energy substation performs a communication handshake;

[0020] Step 3: When the operation status check of the main equipment in the chain energy network is abnormal, it is determined that the chain energy Internet enters the fault processing state, the fault location is determined and the fault is eliminated;

[0021] Step 4: When the communication handshake is normal, the distributed intelligent terminal collects in real time the operating data of the AC transformer connected to the energy substation and the equipment in the AC transformer input line, the high-voltage circuit breaker and the bus tie switch, the low-voltage AC side equipment, and other equipment in the energy substation, as well as the environmental data of the energy substation monitoring point, and performs edge computing analysis;

[0022] Step 5: When the communication handshake of the distributed intelligent terminal of the energy substation is abnormal, determine the location of the faulty distributed intelligent terminal and eliminate its fault;

[0023] Step 6: When the distributed intelligent terminal monitors that the operation status of each device in the energy substation is normal, the distributed intelligent terminal is used to coordinate the operation of the devices in the energy substation on site; the distributed intelligent terminal also transmits necessary data to the general coordination control unit according to the agreement, and the general coordination control unit monitors the overall operation status of the chain energy Internet. The general coordination control unit sends control instructions to the associated distributed intelligent terminals as a master-level control strategy to guide the operation of the devices in the energy substation with a higher priority, and the general coordination control unit coordinates the operation between the energy substations;

[0024] Step 7. When the distributed intelligent terminal monitors that the operating status of each device in the energy substation is abnormal, the general coordination control unit determines the location of the fault point according to the received data, and cuts off the power supply of the energy substation at the fault point by controlling the intelligent circuit breaker device. The energy substation enters the backup power supply mode, and the energy storage system in the energy substation becomes the main backup power supply in the energy substation; and the main coupling switch of the AC connecting line with the adjacent energy router of the energy substation that has cut off the power supply is closed, so that the adjacent energy substations can achieve energy mutual assistance through the energy router, and provide emergency power for the power load in the energy substation that has cut off the power supply, and at the same time report the location of the fault point and wait for the fault to be eliminated.

[0025] The chain energy internet and control method thereof applicable to highways and canals provided by the technical solution of the present invention are to lead out high-voltage AC power supply points from the side of the highway and along the canal, and make the power supply radius of the led out high-voltage AC power supply points overlap each other. At the same time, the high-voltage AC power supply points are connected one-to-one with energy substations including renewable energy, low-voltage AC distribution cabinets, energy routers, and distributed intelligent terminals through AC transformers to form a chain energy internet. The chain energy internet and control method thereof applicable to highways and canals adopts the power supply mode of AC networking to form a systematic, modular, and standardized power supply solution, which has the following characteristics and advantages:

[0026] (1) The application of chain energy Internet on highways and canals can meet the urgent need for stable and reliable power supply along highways and canals. Through the reasonable setting of AC power supply, while reducing long-distance transmission of electric energy, reducing power loss, and slowing down the expansion of distribution facilities, it meets the system N-1 requirements and improves the reliability of system power supply. The decentralized energy substation configuration facilitates local access to loads.

[0027] (2) Make full use of renewable energy resources such as photovoltaic power and wind power along highways and canals to promote the local consumption of renewable energy and meet the needs of green development.

[0028] (3) The photovoltaic / wind power and energy storage systems are used in conjunction with the energy substation coordinated control system to smooth out photovoltaic / wind turbine fluctuations while improving system efficiency.

[0029] (4) When a distribution network failure occurs, the existing photovoltaic, wind turbine, and energy storage systems can provide emergency protection. Flexible resources such as V2G charging piles and mobile energy storage vehicles can supplement electricity for loads along highways and canals through the energy substation system.

[0030] (5) The energy router device can better meet the access needs of photovoltaic, wind power, energy storage, and power quality controllers at the end of the power supply, promote the improvement of power quality, and at the same time meet the access needs of AC loads and DC loads of multiple voltage levels. The busbar interconnection between energy router devices further improves the reliability of power supply in the end power supply system. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] A more complete understanding of exemplary embodiments of the present invention may be obtained by referring to the following drawings:

[0032] Figure 1 A schematic diagram of the structure of a chain energy internet applicable to highways and canals according to a preferred embodiment of the present invention;

[0033] Figure 2 It is a structural schematic diagram of a chain energy internet applicable to highways and canals using a 35kV high-voltage AC power supply point according to a preferred embodiment of the present invention;

[0034] Figure 3 The figure is a flow chart of a control method of a chain energy internet applicable to highways and canals according to a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0035] Now, exemplary embodiments of the present invention are described with reference to the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to disclose the present invention in detail and completely and to fully convey the scope of the present invention to those skilled in the art. The terms used in the exemplary embodiments shown in the accompanying drawings are not intended to limit the present invention. In the accompanying drawings, the same units / elements are marked with the same reference numerals.

[0036] Unless otherwise specified, the terms (including technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it is understood that the terms defined in commonly used dictionaries should be understood to have the same meanings as those in the context of the relevant fields, and should not be understood as idealized or overly formal meanings.

[0037] Figure 1 FIG. 1 is a schematic diagram of a chain energy internet structure applicable to highways and canals according to a preferred embodiment of the present invention. Figure 1 As shown, the chain energy internet 100 applicable to highways and canals described in this preferred embodiment includes:

[0038] A plurality of high-voltage AC power supply points 101 are used to provide a total power supply point for the power loads on the highway side and along the canal, and the power supply radius of two adjacent high-voltage AC power supply points overlaps each other. Figure 1The power supply radius of each high-voltage AC power supply point is 30 kilometers. In order to ensure that the power supply radii of two adjacent high-voltage AC power supply points cover each other, a high-voltage AC power supply point is set up every 30 kilometers. Therefore, when a power supply failure occurs in a certain high-voltage AC power supply point, the two adjacent high-voltage AC power supply points can supply power to the energy substation of the failed high-voltage AC power supply point, fully ensuring the reliability and stability of power supply.

[0039] A plurality of AC transformers 102 are connected to the high-voltage AC power supply point and the energy substation under the low-voltage AC bus, and are used to reduce the voltage input from the high-voltage AC power supply point connected thereto. AC transformers corresponding to the number of high-voltage AC power supply points are installed between adjacent high-voltage AC power supply points, and each AC transformer is connected to an energy substation.

[0040] The energy substation 103 is used to connect the power loads on the highway side and the canal side and provide electric energy to the connected power loads.

[0041] Preferably, the energy substation 103 includes:

[0042] The low-voltage AC distribution cabinet 131 is connected to the output line of the AC transformer 102 and is used to provide access, metering, control and protection for the energy router 132 and the power load 133. The low-voltage AC distribution cabinet includes switches / circuit breakers, protection equipment, measuring equipment, metering equipment and other devices. The low-voltage AC distribution cabinet provides access, control and protection for photovoltaic / wind turbines, energy storage systems, energy router devices, power quality controllers at the end of power supply and power loads.

[0043] The energy router 132 is used to provide interconnection of the AC busbar on the low-voltage side of the AC transformer and access to the power load. The energy router device provides interconnection of the AC busbar of the AC transformer 102, as well as access to photovoltaic, wind power, energy storage, power quality controller at the end of the power supply, AC load, and DC load in the energy substation 103. The energy router device can better meet the access requirements of photovoltaic, wind power, energy storage, and power quality controller at the end of the power supply, promote the improvement of power quality, and meet the access requirements of AC loads and DC loads of multiple voltage levels. The busbar interconnection between energy router devices further improves the reliability of power supply of the terminal power supply system.

[0044] The distributed intelligent terminal 134 is used to collect the AC transformer connected to the energy substation and the AC transformer input line, the operating data of other equipment in the energy substation, and the environmental data of the energy substation, and realizes the analysis of the collected data and the operation control in the energy substation through two-way information interaction and distributed edge computing, combined with the control strategy in the energy substation issued by the general coordination control unit. The distributed intelligent terminal collects multiple data, including parameters such as AC and DC current, AC and DC voltage, temperature, humidity, AC and DC leakage, time scale, AC and DC power, frequency, etc., so as to provide underlying data support for the chain energy Internet of highways and canals.

[0045] Preferably, the energy substation 103 also includes a clean energy and energy storage system 135 for providing electric energy to connected power loads and providing emergency electric energy when the power system is temporarily interrupted and the AC power supply fails to work.

[0046] Preferably, the energy substation 103 also includes a power quality controller 136 at the end of the power supply, which uses a static VAR generator, a static synchronous compensator for power distribution and a static VAR compensator to control the power quality at the end of the power supply, so as to provide power supply with the reliability and power quality levels required by users who are sensitive to power quality.

[0047] Preferably, a high-voltage AC distribution room 104 is configured at the front end of the AC transformer 102. The wiring of the high-voltage AC distribution room 104 is simultaneously connected from two adjacent high-voltage AC power supply points, and a high-voltage circuit breaker 105 and a bus tie switch 106 are installed on each access line. The two lines are isolated and protected by the high-voltage circuit breaker 105 and the bus tie switch 106. When one of the lines is under maintenance or fails, the high-voltage circuit breaker and the bus tie switch connected to the other normally operating line are closed to supply power to the AC transformer.

[0048] Preferably, the chain energy Internet 100 also includes a general coordination control unit 107, which is deployed near the high-voltage AC power supply point 101, and is used to monitor the operating status of all high-voltage AC power supply points in the chain energy network, and receive the necessary data transmitted by all energy substations as agreed, and send control commands to the energy substations according to the received data, so as to coordinate and control the energy substations and between energy substations. Specifically, in practical applications, the general coordination control unit is the central controller of the chain energy Internet, and the distributed intelligent terminal of each energy substation collects data and transmits the necessary data information to the general coordination control unit as agreed, and the general coordination control unit analyzes the operating status of the high-voltage AC power supply point and the data sent by the distributed intelligent terminal and sends control instructions to the associated distributed intelligent terminals, low-voltage AC power distribution cabinets, intelligent circuit breakers, high-voltage circuit breakers or bus tie switches, so as to coordinate and control the AC transformers connected thereto, the AC transformer input lines, low-voltage AC side equipment, and the energy substations and between energy substations, that is, the distributed intelligent terminals combine the control instructions of the "central controller" and the distributed edge computing control in the energy substation to form instructions actually executed by the equipment in the energy substation.

[0049] Preferably, the high-voltage AC power supply point is derived from a highway service area / canal service area power supply point, or is newly built along the highway / canal.

[0050] Preferably, the power supply radius of the high-voltage AC power supply point is determined according to the total power transmission capacity and the wire diameter of the cable of its transmission line, wherein, when the wire diameter margin of the cable is sufficient, the greater the total power transmission capacity, the shorter the power supply radius. In practical applications, when the wire diameter margin of the selected cable is sufficient, when the power transmission capacity is 2-15MVA, the power supply radius of the 35kV AC line is 20-50km, and the greater the power transmission capacity, the shorter the power supply radius. According to the existing load and planning along the highway / canal, it can be determined that the power supply radius of the 35kV AC line does not exceed 30km, and the power supply radius of the 10kV AC line does not exceed 15km. In addition, considering the load increase scenarios such as bridges, tunnels, bends, canal ship charging points, electric vehicle charging points, service areas, etc., the power supply radius of the high-voltage AC power supply point can be flexibly adjusted to meet the power supply of the above load units.

[0051] Figure 2 The schematic diagram of the structure of the chain energy Internet applicable to highways and canals using 35kV high voltage AC power supply points according to the preferred embodiment of the present invention. Figure 2As shown, when the high-voltage AC power source point is a 35kV power source point, the power supply radius is 30 kilometers, and a power source point is set every 30 kilometers. In actual application, when the high-voltage AC power source point is a 10kV power source point, the power supply radius is 15 kilometers, and a power source point is set every 15 kilometers. The above arrangement ensures that the power supply radius of two adjacent power sources covers each other. Each AC transformer 102 converts 35kV AC into 0.4KV AC. A high-voltage AC distribution room 104 is configured in front of each AC transformer 102. The high-voltage AC distribution room 104 is wired to be connected from two adjacent high-voltage AC power sources at the same time, and a high-voltage circuit breaker 105 and a busbar switch 106 are installed on each access line. The high-voltage AC distribution room includes AC incoming lines, high-voltage circuit breakers, relay protection, load switches, AC outgoing lines, measurement and control, cooling and ventilation systems. An AC transformer is connected to an energy substation 103, and each energy substation 103 includes a low-voltage AC distribution cabinet 131, an energy router 132, a power load 133, a distributed intelligent terminal 134, a clean energy and energy storage system 135, and a power supply terminal power quality controller 136. The chain energy Internet is also equipped with a general coordination control unit 107, which is deployed near the high-voltage AC power supply point 101 to monitor the operating status of all high-voltage AC power supply points in the chain energy network. The general coordination control unit is preferably set within 500m of the high-voltage AC power supply point.

[0052] Figure 3 FIG. 1 is a flow chart of a control method for a chain energy internet applicable to highways and canals according to a preferred embodiment of the present invention. Figure 3 As shown, the control method 300 of the chain energy Internet applicable to highways and canals described in this preferred embodiment includes:

[0053] In step 301, the operating status of the main equipment in the chain energy network is checked based on the overall coordination control unit.

[0054] In step 302, when the inspection is normal, the distributed intelligent terminal of the energy substation performs a communication handshake.

[0055] In step 303, when the operation status check of the main equipment in the chain energy network is abnormal, it is determined that the chain energy Internet enters a fault processing state, the fault location is determined and the fault is eliminated.

[0056] In step 304, when the communication handshake is normal, the distributed intelligent terminal collects in real time the operating data of the AC transformer connected to the energy substation and the equipment in the AC transformer input line, the high-voltage circuit breaker and the bus tie switch, the low-voltage AC side equipment, and other equipment in the energy substation, as well as the environmental data of the energy substation monitoring point, and performs edge computing analysis.

[0057] In step 305, when the distributed intelligent terminal of the energy substation has a communication handshake abnormality, the location of the faulty distributed intelligent terminal is determined and the fault is eliminated;

[0058] In step 306, when the distributed intelligent terminal monitors that the operating status of each device in the energy substation is normal, the distributed intelligent terminal is used to coordinate the operation of the equipment in the energy substation on-site; the distributed intelligent terminal also transmits necessary data to the general coordination control unit as agreed, and the general coordination control unit monitors the overall operating status of the chain energy Internet. The general coordination control unit sends control instructions to the associated distributed intelligent terminals as a master station-level control strategy, guides the operation of the equipment in the energy substation with a higher priority, and the general coordination control unit coordinates the operation between the energy substations.

[0059] In step 307, when the distributed intelligent terminal monitors that the operating status of each device in the energy substation is abnormal, the general coordination control unit determines the location of the fault point based on the received data, and cuts off the power supply of the energy substation at the fault point by controlling the intelligent circuit breaker device. The energy substation enters the backup power supply mode, and the energy storage system in the energy substation becomes the main backup power supply in the energy substation; and the main coupling switch of the AC connecting line with the adjacent energy router of the energy substation that has cut off the power supply is closed, so that the adjacent energy substations can achieve energy mutual assistance through the energy router, provide emergency power for the power load in the energy substation that has cut off the power supply, and report the location of the fault point at the same time, waiting for the fault to be eliminated.

[0060] The invention has been described above with reference to a few embodiments. However, it is readily apparent to a person skilled in the art that other embodiments than the ones disclosed above are equally within the scope of the invention, as defined by the appended patent claims.

[0061] Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise herein. All references to "a / said / the [means, components, etc.]" are to be openly interpreted as at least one instance of the means, components, etc., unless explicitly stated otherwise. The steps of any method disclosed herein do not necessarily have to be performed in the exact order disclosed, unless explicitly stated otherwise.

[0062] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0063] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0064] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0065] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A chain energy internet suitable for highways and canals, characterized in that: The chain energy internet includes: Several high-voltage AC power supply points are used to provide a total power supply point for the power loads on the highway side and along the canal, and the power supply radius of two adjacent high-voltage AC power supply points overlaps each other; A plurality of AC transformers, which are connected to the high-voltage AC power supply points and the energy substations under the low-voltage AC busbars, and are used to reduce the voltage input from the high-voltage AC power supply points connected thereto. AC transformers corresponding to the number of high-voltage AC power supply points are installed between the adjacent high-voltage AC power supply points, and each AC transformer is connected to an energy substation; A general coordination control unit, which is deployed near the high-voltage AC power source point and is used to monitor the operating status of all high-voltage AC power sources in the chain energy network, receive necessary data transmitted by all energy substations as agreed, and send control commands to the energy substations according to the received data, so as to perform coordinated control within the energy substations and between the energy substations; The energy substation is used to connect the power loads on the highway side and the canal side and provide power to the connected power loads, including: A low-voltage AC distribution cabinet, which is connected to the output line of the AC transformer and is used to provide access, metering, control and protection for the energy router and power loads; Energy router, used to provide interconnection of AC busbars on the low-voltage side of AC transformers and access to power loads; The distributed intelligent terminal is used to collect the operating data of the AC transformer and the AC transformer input line connected to the energy substation, other equipment in the energy substation, and the environmental data of the energy substation. Through two-way information interaction and distributed edge computing, and combined with the control strategy within the energy substation issued by the overall coordination control unit, the collected data can be analyzed and the operation control within the energy substation can be realized.

2. The chained energy internet according to claim 1, characterized in that: A high-voltage AC distribution room is configured at the front end of the AC transformer. The wiring of the high-voltage AC distribution room is simultaneously connected from two adjacent high-voltage AC power supply points, and a high-voltage circuit breaker and a bus tie switch are installed on each access line. The two lines are isolated and protected by the high-voltage circuit breaker and the bus tie switch. When one of the lines is under maintenance or fails, the high-voltage circuit breaker and the bus tie switch connected to the other normally operating line are closed to supply power to the AC transformer.

3. The chained energy internet according to claim 1, characterized in that: The energy substation also includes a clean energy and energy storage system for providing electric energy to connected power loads, and for providing emergency electric energy when the power system is temporarily interrupted and the AC power supply fails to work.

4. The chained energy internet according to claim 1, characterized in that: The energy substation also includes a power quality controller at the end of the power supply, which uses a static VAR generator, a static synchronous compensator for distribution and a static VAR compensator to control the power quality at the end of the power supply, and provides power supply that meets the reliability and power quality levels required by users who are sensitive to power quality.

5. The chained energy internet according to claim 1, characterized in that: The high-voltage AC power supply point is drawn from the highway service area / canal service area power supply point, or is newly built along the highway / canal.

6. The chained energy internet according to claim 1, characterized in that: The power supply radius of the high-voltage AC power supply point is determined according to the total power transmission capacity and the wire diameter of the cable of its transmission line. When the wire diameter margin of the cable is sufficient, the greater the total power transmission capacity, the shorter the power supply radius.

7. A method for controlling a chain energy internet applicable to highways and canals, characterized in that: The method comprises: Step 1: Check the operating status of the main equipment in the chain energy network based on the overall coordination control unit; Step 2: When the inspection is normal, the distributed intelligent terminal of the energy substation performs a communication handshake; Step 3: When the operation status check of the main equipment in the chain energy network is abnormal, it is determined that the chain energy Internet enters the fault processing state, the fault location is determined and the fault is eliminated; Step 4: When the communication handshake is normal, the distributed intelligent terminal collects in real time the operating data of the AC transformer connected to the energy substation and the equipment in the AC transformer input line, the high-voltage circuit breaker and the bus tie switch, the low-voltage AC side equipment, and other equipment in the energy substation, as well as the environmental data of the energy substation monitoring point, and performs edge computing analysis; Step 5: When the communication handshake of the distributed intelligent terminal of the energy substation is abnormal, determine the location of the faulty distributed intelligent terminal and eliminate its fault; Step 6: When the distributed intelligent terminal monitors that the operation status of each device in the energy substation is normal, the distributed intelligent terminal is used to coordinate the operation of the devices in the energy substation on site; the distributed intelligent terminal also transmits necessary data to the general coordination control unit according to the agreement, and the general coordination control unit monitors the overall operation status of the chain energy Internet. The general coordination control unit sends control instructions to the associated distributed intelligent terminals as a master-level control strategy to guide the operation of the devices in the energy substation with a higher priority, and the general coordination control unit coordinates the operation between the energy substations; Step 7. When the distributed intelligent terminal monitors that the operating status of each device in the energy substation is abnormal, the general coordination control unit determines the location of the fault point according to the received data, and cuts off the power supply of the energy substation at the fault point by controlling the intelligent circuit breaker device. The energy substation enters the backup power supply mode, and the energy storage system in the energy substation becomes the main backup power supply in the energy substation; and the main coupling switch of the AC connecting line with the adjacent energy router of the energy substation that has cut off the power supply is closed, so that the adjacent energy substations can achieve energy mutual assistance through the energy router, and provide emergency power for the power load in the energy substation that has cut off the power supply, and at the same time report the location of the fault point and wait for the fault to be eliminated.

Images