Intelligent power grid monitoring system and method thereof

Abstract

The invention relates to the technical field of intelligent power grids, in particular to an intelligent power grid monitoring system and a method thereof. Comprising a node detection module, a damage feedback module, a standby power grid switching module and an early warning positioning module. According to the invention, the voltage at the detection node is detected through the voltage detection device, when the detection node has a fault, the standby power grid of the detection node is started through the standby power grid switching module, a signal sent by the detection node behind the feedback damaged node is received, and if the signal is a normal voltage signal, the fault is detected. If the signal is an abnormal voltage signal, the fault area is a previous node detection line segment, if the signal is an abnormal voltage signal, the current standby power grid is switched to work through a standby power grid switching module, and the like, downward judgment is performed, so that the fault area and length in the power grid line are judged, and accurate positioning of a fault point is realized.

Description

Technical Field

[0001] The present invention relates to the field of smart grid technology, and in particular to a smart grid monitoring system and method thereof. Background Art

[0002] Smart grid is the intelligence of power grid. It is built on the basis of integrated, high-speed two-way communication network. Through the application of advanced sensing and measurement technology, advanced equipment technology, advanced control method and advanced decision support system technology, it realizes the goal of reliable, safe, economical, efficient, environmentally friendly and safe use of power grid. Its main features include self-healing, incentive and protection of users, defense against attacks, providing power quality that meets user needs, allowing access to various forms of power generation, starting power market and optimizing and efficient operation of assets. And with the operation of smart grid, due to the influence of natural environment and the natural aging of transmission lines, abnormal faults will occur in the power grid, thereby interrupting the power supply of the power grid and causing unnecessary losses.

[0003] In the current existing technology, the solution to power grid line failure is generally to monitor the entire line of the power grid, which requires staff to conduct step-by-step inspections. During the inspection process, staff need to arrive at the site to conduct multi-point inspections of the power grid line. Staff conduct voltage inspections on each base station, which will waste a lot of time and be inefficient. It is impossible to accurately locate the fault area and length. If the detection equipment is abnormal, it is impossible to accurately distinguish the working condition of the power grid line, affecting the maintenance process. Therefore, we propose a smart grid monitoring system and method. Summary of the invention

[0004] The object of the present invention is to provide a smart grid monitoring system and method thereof to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, one of the purposes of the present invention is to provide a smart grid monitoring system, including a node detection module, a damage feedback module, a backup grid switching module and an early warning positioning module;

[0006] The node detection module establishes multiple groups of detection nodes on the power grid line and uses voltage detection equipment to perform real-time detection of the voltage of multiple detection nodes. If the voltage is abnormal, a damage signal is output; if the voltage is normal, a normal signal is output;

[0007] After receiving the damage signal from the node detection module, the damage feedback module receives the signal from the detection node behind the damaged node. If the signal is a damage signal, a fault occurs at the detection node of the power grid; if the signal is a normal voltage signal, a fault occurs at the voltage detection device.

[0008] When the backup power grid switching module receives a signal indicating that a fault has occurred at a detection node of the damaged feedback module, it switches the backup power grid and receives a signal from a detection node behind the damaged node. If the signal is a normal voltage signal, the fault area is the previous node detection line segment. If the signal is an abnormal voltage signal, the backup power grid switching module switches the current backup power grid to work, and judges the current node detection line segment by receiving a voltage signal from the next detection node.

[0009] The early warning positioning module determines whether the voltage detection device is faulty or the grid node line is faulty through the signal fed back by the damage feedback module. If the voltage detection device is faulty, an intermittent early warning signal is issued. If the grid node line is faulty, a continuous early warning signal is issued, and the fault area and length are located through the standby grid switching module.

[0010] Preferably, the backup power grid switching module includes a local monitoring unit, a communication unit, a remote control unit and a switching switch unit. The local monitoring unit collects and monitors the voltage data of the detection node, the communication unit is responsible for controlling the information interaction between the backup power grid switching module and the external network, and the remote control unit is used to remotely control the switching switch unit to switch the backup power grid.

[0011] Preferably, the local monitoring unit is connected to the main control chip using an RS-485 communication interface, and an analog-to-digital converter is provided in the local monitoring unit to achieve real-time collection and monitoring of the voltage data of the detection node in two ways.

[0012] Preferably, the communication unit uses TCP / IP to transmit data, TCP is responsible for establishing a connection before data transmission and ensuring the order and integrity of data during data transmission, and IP is responsible for routing data packets from a source address to a destination address.

[0013] Preferably, the remote control unit uses TCP / IP reverse communication as a basic transmission channel to transmit the corresponding control signal to the switching unit, and the switching unit independently controls each section of the backup power grid, and the address of each section of the backup power grid is unique.

[0014] Preferably, the early warning and positioning module includes a sound early warning unit and a positioning and display unit. The sound early warning unit issues a sound early warning when receiving a power grid line fault signal. The positioning and display unit visualizes each detection node on the power grid line, detects the corresponding fault node through the backup power grid switching module, and intuitively reflects it on the image.

[0015] Preferably, the sound warning unit sends out different warning signals according to the detection result of the damage feedback module. If the voltage detection device fails, an intermittent warning signal is sent out, and if the detection node fails, a continuous warning signal is sent out.

[0016] Preferably, the positioning and display unit includes an acquisition subunit, an image analysis subunit and a modeling subunit. The acquisition subunit acquires image information of various areas of the power grid line through an image acquisition device. The image analysis subunit identifies line edge information in the image information through an edge detection algorithm, acquires detection nodes in the image information through a feature extraction algorithm, and further acquires location information of the detection nodes. The modeling subunit establishes a power grid model based on the line edge information and the location information of the detection nodes.

[0017] Preferably, the modeling subunit comprises the following steps:

[0018] Smoothing the collected line edge information and detection node location information;

[0019] The detection node position information is converted from the image coordinate system to the engineering coordinate system, and at the same time, the line edge information is converted accordingly;

[0020] Creating corresponding nodes based on the position information of the detected node conversion, and creating line segments connecting the nodes based on the edge information of the line conversion;

[0021] The connection relationship between nodes is determined according to the position information of the support point conversion, the starting node and the ending node are determined according to the edge information of the line conversion, and the relationship between the nodes and the line segments is established to establish the power grid model.

[0022] A second object of the present invention is to provide a smart grid monitoring method, comprising any one of the smart grid monitoring systems described above, comprising the following steps:

[0023] S1. Establish multiple groups of detection points on the power grid line through the node detection module, and use voltage detection equipment to perform real-time detection of the voltage of multiple detection nodes. If the voltage is abnormal, a damage signal is output; if the voltage is normal, a normal signal is output;

[0024] S2, the damage feedback module determines the fault point according to the signal sent by the detection node behind the damaged node. If the signal is a damage signal, a fault occurs at the detection node of the power grid. If the signal is a normal voltage signal, a fault occurs at the voltage detection device.

[0025] S3, switch the backup power grid of the corresponding detection node through the backup power grid switching module, judge the faulty node and length according to the voltage signal of the subsequent detection node, if the signal is a normal voltage signal, the fault area is the previous node detection line segment, if the signal is an abnormal voltage signal, switch the current backup power grid to work through the backup power grid switching module, and so on, judge downward;

[0026] S4. The early warning positioning module sends out corresponding early warning signals for different types of faults, and intuitively displays the fault area and length by building a power grid model.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. When a detection node fails, the backup power grid of the detection node is enabled through the backup power grid switching module, and the signal sent by the detection node behind the damaged node is received and fed back. If the signal is a normal voltage signal, the fault area is the previous node detection segment. If the signal is an abnormal voltage signal, the current backup power grid is switched to work through the backup power grid switching module. By receiving the voltage signal of the next detection node, the current node detection segment is judged, thereby judging the fault area and length in the power grid line, and accurately locating the fault point.

[0029] 2. When the damage feedback module receives the damage signal from the node detection module, it also receives the signal from the detection node behind the damaged node. If the signal is a damage signal, a fault occurs at the detection node of the power grid. If the signal is a normal voltage signal, a fault occurs in the voltage detection device. This enables the judgment of the type of power grid line fault to be made, thereby promoting subsequent maintenance work.

[0030] 3. The sound warning unit of the early warning positioning module sends out different early warning signals according to the detection results of the damage feedback module. If the voltage detection equipment fails, an intermittent early warning signal is issued. If the detection node fails, a continuous early warning signal is issued, thereby achieving an intuitive judgment of the type of power grid line fault, and visualizing each detection node on the power grid line through the positioning display unit, and detecting the corresponding fault node and area length through the standby power grid switching module, which are intuitively reflected in the image. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic block diagram of the overall modules of the present invention;

[0032] Figure 2 It is a schematic block diagram of a backup power grid switching module of the present invention;

[0033] Figure 3 It is a schematic block diagram of the early warning positioning module of the present invention;

[0034] Figure 4 is a flow chart of the method of the present invention;

[0035] Figure 5 This is a diagram of the backup power grid and detection node locations of the present invention.

[0036] The meaning of each number in the figure is:

[0037] 100. Node detection module; 200. Damage feedback module; 300. Backup power grid switching module; 310. Local monitoring unit; 320. Communication unit; 330. Remote control unit; 340. Switching switch unit; 400. Early warning and positioning module; 410. Sound early warning unit; 420. Positioning and display unit; 421. Collection subunit; 422. Image analysis subunit; 423. Modeling subunit. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] Smart grid is the intelligence of power grid. It is built on the basis of integrated, high-speed two-way communication network. Through the application of advanced sensing and measurement technology, advanced equipment technology, advanced control methods and advanced decision support system technology, it realizes the goals of reliable, safe, economical, efficient, environmentally friendly and safe use of power grid. Its main features include self-healing, motivating and protecting users, resisting attacks, providing power quality that meets user needs, allowing access to various forms of power generation, starting the power market and optimizing and efficient operation of assets. And with the operation of smart grid, due to the influence of natural environment and the natural aging of transmission lines, abnormal faults will occur in the power grid, thereby interrupting the power supply of the power grid and causing unnecessary losses, such as Figure 1 As shown, one of the purposes of the present invention is to provide a smart grid monitoring system, including a node detection module 100, a damage feedback module 200, a backup grid switching module 300 and an early warning positioning module 400;

[0040] The node detection module 100 establishes multiple groups of detection nodes on the power grid line and uses voltage detection equipment to detect the voltage of multiple detection nodes in real time. If the voltage is abnormal, a damage signal is output; if the voltage is normal, a normal signal is output;

[0041] When the damage feedback module 200 receives the damage signal sent by the node detection module 100, it also receives the signal sent by the detection node behind the damaged node. If the signal is a damage signal, a fault occurs at the detection node of the power grid. If the signal is a normal voltage signal, a fault occurs at the voltage detection device, thereby realizing the judgment of the type of power grid line fault;

[0042] When the backup power grid switching module 300 receives a signal indicating a fault at the detection node of the damaged feedback module 200, it switches the backup power grid and receives a signal from the detection node behind the damaged node. If the signal is a normal voltage signal, the fault area is the previous node detection line segment. If the signal is an abnormal voltage signal, the backup power grid switching module 300 switches the current backup power grid to work, and judges the current node detection line segment by receiving the voltage signal of the next detection node, thereby judging the fault area and length in the power grid line, and realizing accurate positioning of the fault point.

[0043] The early warning positioning module 400 determines whether the voltage detection device is faulty or the grid node line is faulty through the signal fed back by the damage feedback module 200. If the voltage detection device is faulty, an intermittent early warning signal is issued. If the grid node line is faulty, a continuous early warning signal is issued, thereby achieving intuitive judgment of the type of grid line fault, and visualizing each detection node on the grid line through the positioning display unit, detecting the corresponding fault node and area length through the standby grid switching module, and intuitively reflecting them on the image.

[0044] like Figure 2 As shown, the backup power grid switching module 300 includes a local monitoring unit 310, a communication unit 320, a remote control unit 330 and a switching switch unit 340. The local monitoring unit 310 of the backup power grid switching module 300 can immediately detect the fault signal and transmit the fault signal to the main control network through the communication unit 320. At this time, the main control network controls the remote control unit 330 to control the switching switch unit 340 to switch the backup power grid.

[0045] like Figure 5 As shown, detection node 1, detection node 2, and detection node 3 respectively detect the voltage of the corresponding node, and send the detection signal to the damage feedback module 200, and the damage feedback module 200 sends the damage signal to the backup power grid switching module 300. The backup power grid switching module 300 controls the activation of the backup power grid 1, the backup power grid 2, and the backup power grid 3 by switching the switch unit 340. The backup power grid is connected in parallel to a section of the power grid line corresponding to the detection node, so as to realize segmented detection of the power grid line.

[0046] Taking into account that the RS-485 communication interface requires professional wiring, in order to prevent the line of the RS-485 communication interface from being damaged, the local monitoring unit 310 adopts the RS-485 communication interface to connect with the main control chip, and is equipped with an analog-to-digital converter in the local monitoring unit 310 to convert the analog signal into a digital signal and transmit it to the local monitoring unit 310. Real-time collection and monitoring of the voltage data of the detection node are achieved through these two methods, thereby ensuring that the local monitoring data can be accurately transmitted to the communication unit 320.

[0047] Considering that the use of RS-485 communication interface for long-distance data transmission will require a lot of wiring, resulting in a waste of resources, the communication unit 320 uses TCP / IP to transmit data. TCP is responsible for establishing a connection before data transmission and ensuring the order and integrity of data during data transmission. IP is responsible for routing data packets from the source address to the destination address. When TCP / IP performs data transmission, it includes the following steps:

[0048] Application layer: select the corresponding network application service, such as HTTP, FTP, SMTP;

[0049] Transport layer: responsible for data transmission and reliability control;

[0050] Network layer: responsible for routing and forwarding data packets;

[0051] Network interface layer: handles the details of network hardware. First, select the corresponding network application service in the application layer;

[0052] Among them, HTTP: is a simple request-response protocol, which usually runs on top of TCP. It specifies what kind of messages the client may send to the server and what kind of response it will get; FTP: is a widely used standard protocol for file transfer in the network, which implements file upload, download and other file operations; SMTP: is a protocol that provides reliable and efficient email transmission; SMTP is a mail service built on the FTP file transfer service, mainly used for email information transmission between systems, and provides notifications about incoming mail;

[0053] The data transmission process at the transport layer. Before data transmission begins, TCP establishes a connection through a three-way handshake process. This process ensures that both parties are ready to communicate and can send data to each other. After the connection is established, the data is sent in the form of segments. TCP numbers each segment and ensures that they arrive at the receiving end in order. If there is packet loss, TCP will resend the lost segment. TCP prevents network congestion by dynamically adjusting the sender's sending rate to ensure stable data transmission. TCP monitors network congestion and appropriately adjusts the sending window size to reduce the network burden. After the data transmission is completed, TCP releases the connection through a four-wave process to ensure that both parties know that the communication has ended.

[0054] The routing and forwarding process of data packets at the network layer. The network layer first determines whether the target host is located in the same network segment based on the destination IP address in the IP data packet. If the target host and the source host are in the same network segment, the data packet will be sent directly to the target host; if they are not in the same network segment, the data packet will be sent to the default gateway or router. When the data packet needs to be transmitted across network segments, the router will query its own routing table to determine the next hop IP address. The routing table contains the network address and the corresponding next hop router IP address. The router matches the routing table according to the destination network address and finds the corresponding next hop router. After determining the IP address of the next hop router, the router will use the ARP protocol to obtain the MAC address corresponding to the IP address. The ARP protocol queries the MAC address of the target IP address through broadcast requests and updates its own ARP cache table. After obtaining the MAC address of the next hop router, the router updates the destination MAC address of the data packet to the MAC address of the next hop router and sends the data packet to the router. After the next hop router receives the data packet, it will repeat the above process until the data packet reaches the target network segment. During the data packet forwarding process, the router may dynamically select the best path based on the network conditions and routing protocols to ensure that the data packet can reach the destination efficiently and accurately.

[0055] The network interface layer handles the details of the network hardware.

[0056] The TCP / IP communication protocol uses the Internet to transmit data, which not only greatly saves long-distance wiring operations and saves a lot of resources, but also the transport layer and network layer work together to improve the accuracy and stability of data transmission.

[0057] In order to ensure that the remote control unit 330 can accurately transmit the control signal to the switching control unit 340 and accurately control the backup power grid, the remote control unit 330 uses the reverse communication of TCP / IP as the basic transmission channel to transmit the corresponding control signal to the switching switch unit 340. The switching switch unit 340 independently controls each section of the backup power grid, and the address of each section of the backup power grid is unique, ensuring that one control signal controls one section of the backup power grid, thereby preventing the influence of address confusion on the switching switch unit.

[0058] like Figure 3 As shown, the early warning and positioning module 400 includes a sound early warning unit 410 and a positioning and display unit 420. When the sound early warning unit 410 receives a power grid line fault signal, it issues a sound early warning, and issues different early warning signals according to the detection result of the damage feedback module 200. If a voltage detection device fails, an intermittent early warning signal is issued. If a detection node fails, a continuous early warning signal is issued. The positioning and display unit 420 visualizes each detection node on the power grid line, detects the corresponding fault node through the standby power grid switching module 300, and intuitively reflects it on the image.

[0059] In order to build a power grid model more accurately, the positioning display unit 420 includes a collection subunit 421, an image analysis subunit 422 and a modeling subunit 423. The collection subunit 421 obtains image information of each area of ​​the power grid line through an image acquisition device, and the image analysis subunit 422 identifies the line edge information in the image information through an edge detection algorithm, obtains the detection node in the image information through a feature extraction algorithm, and then obtains the position information of the detection node;

[0060] The edge detection algorithm determines the position and direction of the edge by performing local differential operations on the image, such as gradient calculation, so as to identify and extract the boundary between the object and the background in the image. The edge is the area where the grayscale changes sharply in the image, which reflects the boundary and outline of the object in the image.

[0061] The feature extraction algorithm identifies and extracts the most representative and distinguishing features from the original data, locates and classifies its feature points, and thus obtains the location information of key nodes;

[0062] The modeling subunit 423 first smoothes the collected line edge information and detection node position information, and then converts the detection node position information from the image coordinate system to the engineering coordinate system. At the same time, the line edge information is correspondingly transformed, and corresponding nodes are created based on the position information of the detection node transformation. At the same time, line segments connecting nodes are created according to the edge information of the line transformation, the connection relationship between nodes is determined according to the position information of the support point transformation, the starting node and the ending node are determined according to the edge information of the line transformation, and the relationship between nodes and line segments is established to establish a power grid model.

[0063] The second object of the present invention is to provide a smart grid monitoring method, including any one of the smart grid monitoring systems described above, such as Figure 4 As shown, the following steps are included:

[0064] S1. Multiple groups of detection points are established on the power grid line through the node detection module 100, and the voltage of multiple detection nodes is detected in real time using a voltage detection device. If the voltage is abnormal, a damage signal is output; if the voltage is normal, a normal signal is output;

[0065] S2, the damage feedback module 200 determines the fault point according to the signal sent by the detection node behind the damaged node. If the signal is a damage signal, a fault occurs at the detection node of the power grid; if the signal is a normal voltage signal, a fault occurs at the voltage detection device;

[0066] S3, switch the backup power grid of the corresponding detection node through the backup power grid switching module 300, judge the faulty node and length according to the voltage signal of the subsequent detection node, if the signal is a normal voltage signal, the fault area is the previous node detection line segment, if the signal is an abnormal voltage signal, switch the current backup power grid to work through the backup power grid switching module 300, and so on, judge downward;

[0067] S4. The early warning location module 400 sends out corresponding early warning signals for different types of faults, and constructs a power grid model to intuitively display the fault area and length.

[0068] In summary, the node detection module 100 establishes multiple groups of detection nodes on the power grid line, and uses voltage detection equipment to perform real-time detection of the voltages of multiple detection nodes. If the voltage is abnormal, a damage signal is output; if the voltage is normal, a normal signal is output; when the damage feedback module 200 receives the damage signal sent by the node detection module 100, and receives the signal sent by the detection node behind the damaged node, if the signal is a damage signal, a fault occurs at the detection node of the power grid; if the signal is a normal voltage signal, a fault occurs in the voltage detection device, thereby realizing the judgment of the type of power grid line fault; when the backup power grid switching module 300 receives the signal that the detection node of the damage feedback module 200 has a fault, it switches the backup power grid and receives the signal sent by the detection node behind the damaged node; if the signal is a normal voltage signal, the fault area is the front For a node detection segment, if the signal is an abnormal voltage signal, the current backup power grid is switched to work through the backup power grid switching module 300, and the current node detection segment is judged by receiving the voltage signal of the next detection node, so as to judge the fault area and length in the power grid line, and accurately locate the fault point, and then the early warning positioning module 400 judges the voltage detection device failure or the power grid node line failure through the signal fed back by the damage feedback module 200. If it is a voltage detection device failure, an intermittent early warning signal is issued, and if it is a power grid node line failure, a continuous early warning signal is issued, thereby realizing an intuitive judgment of the type of power grid line fault, and visualizing each detection node on the power grid line through the positioning display unit, detecting the corresponding fault node and area length through the backup power grid switching module, and intuitively reflecting it on the image.

[0069] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A smart grid monitoring system, characterized in that: It comprises a node detection module (100), a damage feedback module (200), a backup power grid switching module (300) and an early warning positioning module (400); The node detection module (100) establishes multiple groups of detection nodes on the power grid line, uses voltage detection equipment to perform real-time detection of the voltages of the multiple detection nodes, and outputs a damage signal if the voltage is abnormal, and outputs a normal signal if the voltage is normal; wherein: After receiving the damage signal sent by the node detection module (100), the damage feedback module (200) receives a signal sent by a detection node behind the damaged node. If the signal is a damage signal, a fault occurs at the detection node of the power grid; if the signal is a normal voltage signal, a fault occurs in the voltage detection device. When receiving a signal indicating that a detection node of the damaged feedback module (200) is faulty, the backup power grid switching module (300) switches the backup power grid, receives a signal from a detection node behind the damaged feedback node, and if the signal is a normal voltage signal, the fault area is the previous node detection line segment; if the signal is an abnormal voltage signal, the backup power grid switching module (300) switches the current backup power grid to work, and judges the current node detection line segment by receiving a voltage signal from the next detection node; The early warning positioning module (400) determines whether the voltage detection device is faulty or the grid node line is faulty through the signal fed back by the damage feedback module (200); if the voltage detection device is faulty, an intermittent early warning signal is issued; if the grid node line is faulty, a continuous early warning signal is issued; and the fault area and length are located through the standby grid switching module (300).

2. The smart grid monitoring system according to claim 1, characterized in that: The backup power grid switching module (300) comprises a local monitoring unit (310), a communication unit (320), a remote control unit (330) and a switching unit (340); the local monitoring unit (310) collects and monitors voltage data of a detection node; the communication unit (320) is responsible for controlling information interaction between the backup power grid switching module (300) and an external network; and the remote control unit (330) is used to remotely control the switching unit (340) to switch the backup power grid.

3. The smart grid monitoring system according to claim 2, characterized in that: The local monitoring unit (310) is connected to the main control chip using an RS-485 communication interface, and an analog-to-digital converter is provided inside the local monitoring unit (310), so as to realize real-time collection and monitoring of voltage data of the detection node in two ways.

4. The smart grid monitoring system according to claim 2, characterized in that: The communication unit (320) uses TCP / IP for long-distance data transmission. TCP is responsible for establishing a connection before data transmission and ensuring the order and integrity of data during data transmission. IP is responsible for routing data packets from a source address to a destination address.

5. The smart grid monitoring system according to claim 4, characterized in that: The remote control unit (330) uses the TCP / IP reverse communication as the basic transmission channel to transmit the corresponding control signal to the switching unit (340). The switching unit (340) independently controls each section of the backup power grid, and the address of each section of the backup power grid is unique.

6. The smart grid monitoring system according to claim 1, characterized in that: The early warning and positioning module (400) comprises a sound early warning unit (410) and a positioning and display unit (420). The sound early warning unit (410) issues a sound early warning when receiving a power grid line fault signal. The positioning and display unit (420) visualizes each detection node on the power grid line, detects the corresponding fault node through the standby power grid switching module (300), and intuitively reflects it on the image.

7. The smart grid monitoring system according to claim 6, characterized in that: The sound warning unit (410) issues different warning signals according to the detection result of the damage feedback module (200); if a voltage detection device fails, an intermittent warning signal is issued; if a detection node fails, a continuous warning signal is issued.

8. The smart grid monitoring system according to claim 6, characterized in that: The positioning display unit (420) comprises a collection subunit (421), an image analysis subunit (422) and a modeling subunit (423); the collection subunit (421) acquires image information of each area of ​​a power grid line through an image acquisition device; the image analysis subunit (422) identifies line edge information in the image information through an edge detection algorithm, acquires detection nodes in the image information through a feature extraction algorithm, and further acquires location information of the detection nodes; and the modeling subunit (423) establishes a power grid model according to the line edge information and the location information of the detection nodes.

9. The smart grid monitoring system according to claim 8, characterized in that: The modeling subunit (423) comprises the following steps: Smoothing the collected line edge information and detection node location information; The detection node position information is converted from the image coordinate system to the engineering coordinate system, and at the same time, the line edge information is converted accordingly; Creating corresponding nodes based on the position information of the detected node conversion, and creating line segments connecting the nodes based on the edge information of the line conversion; The connection relationship between nodes is determined according to the position information of the support point conversion, the starting node and the ending node are determined according to the edge information of the line conversion, and the relationship between the nodes and the line segments is established to establish the power grid model.

10. A method for implementing smart grid monitoring, applied to a smart grid monitoring system as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Establishing multiple groups of detection points on the power grid line through the node detection module (100), using voltage detection equipment to perform real-time detection of the voltage of multiple detection nodes, and outputting a damage signal if the voltage is abnormal, and outputting a normal signal if the voltage is normal; S2, the damage feedback module (200) determines the fault point according to the signal sent by the detection node behind the damaged node. If the signal is a damage signal, a fault occurs at the detection node of the power grid; if the signal is a normal voltage signal, a fault occurs at the voltage detection device; S3, switching the backup power grid corresponding to the detection node through the backup power grid switching module (300), judging the faulty node and length according to the voltage signal of the subsequent detection node, if the signal is a normal voltage signal, the faulty area is the previous node detection line segment, if the signal is an abnormal voltage signal, switching the current backup power grid to work through the backup power grid switching module (300), and so on, judging downward; S4. Corresponding warning signals are issued for different types of faults through the warning positioning module (400), and the fault area and length are intuitively displayed by constructing a power grid model.

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