Distribution Automation Three-Remote Fault Monitoring System and Method Based on Image Database

Abstract

The present invention discloses a three-remote fault monitoring system and method for distribution automation based on an image database. The monitoring system includes an urban network monitoring server and a rural network monitoring server, both of which are communicatively connected to a distribution network automation dispatching system and an image database. The urban network monitoring server is communicatively connected to an urban network monitoring host, and the urban network monitoring host is respectively communicatively connected to an urban network FTU, an urban network switchgear DTU, and an urban network power consumption load end TTU. The urban network FTU is electrically connected to an urban network infrared monitoring end. The rural network monitoring server is communicatively connected to a rural network monitoring host, and the rural network monitoring host is respectively communicatively connected to a rural network FTU, a rural network substation DTU, and a rural network power consumption load end TTU. The rural network FTU is electrically connected to a rural network infrared monitoring end. The urban network switchgear DTU is respectively communicatively connected to the rural network FTU and the rural network substation DTU. By real-time monitoring of the operation parameters of each node in the urban network and the rural network, the overall operation stability and switching reliability of the distribution network are greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of distribution automation, and particularly to a three-remote fault monitoring system and method for distribution automation based on an image database. Background Art

[0002] Distribution automation refers to an automated system for realizing the operation monitoring of medium- and low-voltage distribution networks, which mainly consists of a distribution main station, a distribution sub-station, distribution terminals, and a distribution communication system. Although the research and development of the distribution automation system have greatly promoted the development of power grid dispatching, power grid operation and maintenance, and power grid management towards integration, intelligence, and platformization, there are still certain problems in urban and rural distribution networks. In urban and rural distribution networks, there are often uneven dispatching, high node failure rates between urban and rural distribution networks. When an abnormality occurs at an urban distribution network node, it is likely to affect the power supply stability of the rural distribution network. Moreover, the grid switching method between urban and rural distribution networks is single and can no longer meet the current demand for non-stop power operation between urban and rural distribution networks. Summary of the Invention

[0003] Aiming at the technical problems that the node failure rate is high between the current urban and rural distribution networks, when an abnormality occurs at an urban distribution network node, it is likely to affect the power supply stability of the rural distribution network, and the grid switching method between urban and rural distribution networks is single and can no longer meet the current demand for non-stop power operation between urban and rural distribution networks, the present application proposes a three-remote fault monitoring system and method for distribution automation based on an image database.

[0004] The present invention realizes the above object through the following technical solutions:

[0005] The three-remote fault monitoring system for distribution automation based on an image database disclosed in the present application includes an urban network monitoring server and a rural network monitoring server. Both the urban network monitoring server and the rural network monitoring server are communicatively connected to a distribution network automation dispatching system and an image database; the urban network monitoring server is communicatively connected to an urban network monitoring host, and the urban network monitoring host is respectively communicatively connected to an urban network FTU, an urban network switchgear DTU, and an urban network power consumption load end TTU. The urban network FTU is electrically connected to an urban network infrared monitoring end; the rural network monitoring server is communicatively connected to a rural network monitoring host, and the rural network monitoring host is respectively communicatively connected to a rural network FTU, a rural network substation DTU, and a rural network power consumption load end TTU. The rural network FTU is electrically connected to a rural network infrared monitoring end; the urban network switchgear DTU is respectively communicatively connected to the rural network FTU and the rural network substation DTU.

[0006] This application monitors the operating parameters of each node in the urban power grid and rural power grid in real time, and enables mutual communication between the nodes of the urban power grid and rural power grid. When a fault occurs in a node of the urban power grid or rural power grid, the associated node of the rural power grid or urban power grid is quickly disconnected, and the normal power transmission line is switched, greatly improving the overall operation stability and switching reliability of the distribution network.

[0007] Preferably, the urban power grid monitoring host and the rural power grid monitoring host are respectively communicatively connected to the urban power grid monitoring server and the rural power grid monitoring server through a communication bus. The urban power grid monitoring host is communicatively connected to the urban power grid FTU, the urban power grid switchgear DTU, and the urban power grid power consumption load end TTU through a wireless communication network. The rural power grid monitoring host is communicatively connected to the rural power grid FTU, the rural power grid substation DTU, and the rural power grid power consumption load end TTU through a wireless communication network. The urban power grid switchgear DTU is communicatively connected to the rural power grid FTU and the rural power grid substation DTU through a wireless communication network.

[0008] Preferably, both the urban power grid infrared monitoring end and the rural power grid infrared monitoring end include infrared imagers, and the infrared imagers are electrically connected to the urban power grid FTU and the rural power grid FTU through signal lines.

[0009] Preferably, both the urban power grid switchgear DTU and the rural power grid substation DTU include a central processing unit. The central processing unit is electrically connected to a remote control interface unit, a telemetry interface unit, and a telemetry interface unit respectively. The central processing unit is electrically connected to a communication unit. The central processing unit is electrically connected to a first power supply unit and a second power supply unit respectively.

[0010] Preferably, the first power supply unit includes an induction iron core sleeved on the power transmission line. The induction iron core is electrically connected to a first control switch through a rectifier filter circuit. The first control switch is respectively electrically connected to the second power supply unit, the central processing unit, and a power management chip. The power management chip is respectively electrically connected to the second power supply unit and the central processing unit. The rectifier filter circuit is electrically connected to the telemetry interface unit through a signal acquisition board. The telemetry interface unit is electrically connected to the power management chip.

[0011] Preferably, the second power supply unit includes a backup battery. The backup battery is electrically connected to the power management chip. The backup battery is electrically connected to the rectifier filter circuit through the first control switch. The backup battery is electrically connected to the central processing unit through a second control switch.

[0012] Preferably, the first control switch includes a first relay, and the second control switch includes a second relay; two sets of the first relays are provided, and both sets of the first relays are electrically connected to the rectifier filter circuit, and the two sets of the first relays are respectively electrically connected to the backup battery and the central processor.

[0013] Preferably, both the urban network FTU and the rural network FTU include a first power supply unit and a second power supply unit.

[0014] This application also discloses a three-remote fault monitoring method for distribution automation based on an image database, including the following steps:

[0015] Obtain the operating parameters of each node in the urban network and the operating parameters of each node in the rural network;

[0016] According to the urban network operation safety threshold and the rural network safety threshold, determine whether the operation of each node in the urban network and each node in the rural network is normal;

[0017] When a node in the urban network operates abnormally, switch the transmission lines of the normal nodes in the urban network, cut off the transmission line between the abnormal urban network node and the rural network, and switch the transmission lines normally connected to the rural network;

[0018] When a node in the rural network operates abnormally, cut off the transmission line between the abnormal rural network node and the urban network, and switch the transmission lines of the normal nodes in the rural network.

[0019] Preferably, the operating parameters of each node in the urban network include infrared imaging parameters of urban network transmission lines, urban network voltage parameters, urban network current parameters, pole-mounted switch operation parameters, and equipment knife switch operation parameters, and the operating parameters of each node in the rural network include infrared imaging parameters of rural network transmission lines, rural network voltage parameters, rural network current parameters, pole-mounted switch operation parameters, and equipment knife switch operation parameters;

[0020] The method for determining abnormalities and switching abnormal nodes of each node in the urban power grid and each node in the rural power grid includes the following steps. The operating parameters of each node in the urban power grid and each node in the rural power grid are respectively uploaded to the urban power grid monitoring host and the rural power grid monitoring host. The urban power grid monitoring host forwards the operating parameters of each node in the urban power grid to the urban power grid monitoring server. The urban power grid monitoring server compares with the infrared imaging parameters of the transmission line stored in the image database. When the infrared imaging parameters are abnormal, the urban power grid monitoring server sends an abnormal signal to the urban power grid monitoring host. The urban power grid monitoring host sends a control instruction to the DTU of the urban power grid switchgear according to the received abnormal signal to control the disconnection of the transmission line of the corresponding node. At the same time, the urban power grid monitoring host controls the disconnection of the transmission line between the corresponding node and the rural power grid. At the same time, the urban power grid switchgear sends a switching instruction to the DTU of the rural power grid substation, and the DTU of the rural power grid substation switches the normal transmission line of the rural power grid. The rural power grid monitoring host forwards the operating parameters of each node in the rural power grid to the rural power grid monitoring server. The rural power grid monitoring server compares with the infrared imaging parameters of the transmission line stored in the image database. When the infrared imaging parameters are abnormal, the rural power grid monitoring server sends an abnormal signal to the rural power grid monitoring host. The rural power grid monitoring host sends a control instruction to the DTU of the rural power grid substation according to the received abnormal signal to control the disconnection of the transmission line of the corresponding node. At the same time, the DTU of the rural power grid substation sends a control instruction to the DTU of the urban power grid switchgear, and the DTU of the urban power grid switchgear controls the disconnection of the transmission line between the urban power grid and the rural power grid. At the same time, the DTU of the rural power grid substation switches the transmission line of the normal node in the rural power grid. Description of the Drawings

[0021] Figure 1 is the overall working principle diagram of the present application.

[0022] Figure 2 is the structural schematic diagram of the DTU in the present application.

[0023] Figure 3 is the working flow chart of the present application. Detailed Embodiments

[0024] The following further explains the technical solutions of the present invention in conjunction with the attached Figures 1-3 ,

[0025] Embodiment 1

[0026] As Figures 1-2As shown in the figure, the present application discloses a three-remote fault monitoring system for distribution automation based on an image database, which includes an urban network monitoring server and a rural network monitoring server. Both the urban network monitoring server and the rural network monitoring server are communicatively connected to a distribution network automation dispatching system and an image database; the urban network monitoring server is communicatively connected to an urban network monitoring host, and the urban network monitoring host is respectively communicatively connected to an urban network FTU, an urban network switchgear DTU, and an urban network power consumption load terminal TTU. The urban network FTU is electrically connected to an urban network infrared monitoring terminal; the rural network monitoring server is communicatively connected to a rural network monitoring host, and the rural network monitoring host is respectively communicatively connected to a rural network FTU, a rural network substation DTU, and a rural network power consumption load terminal TTU. The rural network FTU is electrically connected to a rural network infrared monitoring terminal; the urban network switchgear DTU is respectively communicatively connected to the rural network FTU and the rural network substation DTU. That is to say, the parameters of the transmission lines, switchgears, and power consumption load terminals in each node of the urban network are transmitted to the urban network monitoring host in real time. The urban network monitoring host uploads the received parameters to the urban network monitoring server in real time. The urban network monitor forwards the obtained parameters to the distribution network automation dispatching system D5000. At the same time, the operating parameters of the transmission lines, substations, and power consumption load terminals in each node of the rural network are transmitted to the rural network monitoring host in real time. The rural network monitoring host uploads the received parameters to the rural network monitoring server in real time. The rural network monitoring server forwards the obtained rural network parameters to the distribution network automation dispatching system. The rural network monitoring server and the urban network monitoring server compare the obtained transmission line operating parameters with the preset standard safety thresholds in the image database. When a rural network node or an urban network node is abnormal, the rural network monitoring server or the urban network monitoring server sends a control instruction to the rural network monitoring host or the urban network monitoring host, and the rural network monitoring host or the urban network monitoring host sends a switching instruction to the urban network switchgear DTU or the rural network switchgear DTU.

[0027] Specifically, the urban network monitoring host and the rural network monitoring host are respectively communicatively connected to the urban network monitoring server and the rural network monitoring server through communication buses. The urban network monitoring host is communicatively connected to the urban network FTU, the urban network switchgear DTU, and the urban network power consumption load end TTU through a wireless communication network respectively. The rural network monitoring host is communicatively connected to the rural network FTU, the rural network substation DTU, and the rural network power consumption load end TTU through a wireless communication network respectively. The urban network switchgear DTU is communicatively connected to the rural network FTU and the rural network substation DTU through a wireless communication network respectively. That is to say, the urban network monitoring host and the rural network monitoring host respectively realize data transmission with the urban network monitoring server and the rural network monitoring server through the RS485 communication bus, and the urban network monitoring host is communicatively connected to the urban network FTU, the urban network switchgear DTU, and the urban network power consumption load end TTU through a wireless ad-hoc network respectively. The rural network monitoring host is communicatively connected to the rural network FTU, the rural network substation DTU, and the rural network power consumption terminal TTU through a wireless ad-hoc network respectively. It should be noted that the wireless ad-hoc network is a ZigBee wireless ad-hoc network or a LoRa wireless ad-hoc network.

[0028] Specifically, both the urban network infrared monitoring end and the rural network infrared monitoring end include infrared imagers. The infrared imagers are electrically connected to the urban network FTU and the rural network FTU through signal lines. That is to say, the infrared imaging parameters of the urban network transmission line and the rural network transmission line are respectively obtained by using the infrared imagers, and the infrared imaging parameters can be used to judge whether the transmission line is overloaded, has an arc, etc.

[0029] In some embodiments, both the urban network switchgear DTU and the rural network substation DTU include central processors. The central processors are electrically connected to the remote control interface unit, the remote signaling interface unit, and the remote measurement interface unit respectively. The central processors are electrically connected to the communication unit, and the central processors are electrically connected to the first power supply unit and the second power supply unit respectively. That is to say, the urban network switchgear DTU and the rural network substation DTU are used to obtain the action signals and operation states of the equipment in the switchgear and the substation respectively, and at the same time control the operation states of the equipment. The first power supply unit and the second power supply unit are used to ensure the normal operation of the urban network switchgear DTU and the rural network substation DTU.

[0030] Specifically, the first power supply unit includes an induction iron core sleeved on the transmission line. The induction iron core is electrically connected to the first control switch through a rectifier filter circuit. The first control switch is respectively electrically connected to the second power supply unit, the central processing unit, and the power management chip. The power management chip is respectively electrically connected to the second power supply unit and the central processing unit. The rectifier filter circuit is electrically connected to the telemetry interface unit through a signal acquisition board, and the telemetry interface unit is electrically connected to the power management chip. That is to say, the induction coil on the induction iron core cooperates with the transmission line to induce alternating current. The induced alternating current is rectified and filtered to supply power to electrical components such as the central processing unit. At the same time, the signal acquisition board sends the current signal collected by collecting the output current signal of the rectifier filter circuit to the power management chip and the central processing unit respectively. The power management chip judges whether the first power supply unit is normally powered online through the current signal collected by the signal acquisition board. The central processing unit judges whether the transmission line is operating normally through the current signal collected by the signal acquisition board. When the current signal collected by the signal acquisition board is abnormal, the power management chip controls the first control switch to disconnect. At the same time, the power management chip controls the second power supply unit to start supplying power to electrical components such as the central processing unit. At the same time, the central processing unit forwards various monitoring parameters to the monitoring host through the communication unit. It should be noted that the rectifier filter circuit includes a full-bridge rectifier circuit and an LC filter circuit. The input end of the full-bridge rectifier circuit is electrically connected to the induction coil of the induction iron core. The output end of the full-bridge rectifier circuit is electrically connected to the input end of the LC filter circuit. And the input end of the LC filter circuit is electrically connected to the signal acquisition board through a pull-down resistor.

[0031] Specifically, the second power supply unit includes a backup battery. The backup battery is electrically connected to the power management chip. The backup battery is electrically connected to the rectifier filter circuit through the first control switch. The backup battery is electrically connected to the central processing unit through a second control switch. That is to say, when the first power supply unit is powered off, the backup battery is used to continuously supply power to the central processing unit to ensure the stable operation of the DTU. At the same time, when the first power supply unit resumes power supply, the power management chip controls the first control switch to close, and the backup battery starts to charge.

[0032] In some embodiments, the first control switch includes a first relay, and the second control switch includes a second relay; the number of the first relays is two groups, and the two groups of the first relays are both electrically connected to the rectifying and filtering circuit and are respectively electrically connected to the backup battery and the central processing unit. That is to say, when the first power supply unit is powered off, the power management chip controls the second relay to be powered on, and the normally open contact of the second relay closes. At this time, the backup battery supplies power to the central processing unit. When the first power supply unit supplies power normally, the power management chip can control the first relay electrically connected to the backup battery to be powered on, and the normally open contact of the first relay closes. At this time, the first power supply unit supplies power to the backup battery to ensure the normal charging of the backup battery.

[0033] In some embodiments, both the urban network FTU and the rural network FTU include a first power supply unit and a second power supply unit. That is to say, in order to ensure the operation stability of the urban network FTU and the rural network FTU and avoid the situation that the data of the urban network FTU and the rural network FTU cannot be uploaded when abnormal obstacles occur at the power transmission line nodes, a first power supply unit and a second power supply unit are configured in the urban network FTU and the rural network FTU. The first power supply unit is used to obtain power online from the power transmission line. When the power transmission line is abnormal, the second power supply unit is switched to continue power supply to ensure the normal operation of the urban network FTU and the rural network FTU.

[0034] Embodiment 2

[0035] As Figure 3 shown, the present application also discloses a three-remote fault monitoring method for distribution automation of an image database, including the following steps:

[0036] Using the urban network FTU, urban network DTU, urban network load end TTU, rural network FTU, rural network DTU, and rural network load end TTU to obtain the operation parameters of each node in the urban network and the operation parameters of each node in the rural network in real time. The operation parameters of each node in the urban network include the infrared imaging parameters of the urban network power transmission line, urban network voltage parameters, urban network current parameters, pole-mounted switch action parameters, and equipment knife switch action parameters. The operation parameters of each node in the rural network include the infrared imaging parameters of the rural network power transmission line, rural network voltage parameters, rural network current parameters, pole-mounted switch action parameters, and equipment knife switch action parameters.

[0037] The various operation parameters of the urban power grid obtained by the urban power grid monitoring host and the various operation parameters of the rural power grid obtained by the rural power grid are forwarded in real time to the urban power grid monitoring server and the rural power grid monitoring server. The urban power grid monitoring server and the rural power grid monitoring server combine the preset urban power grid operation safety threshold and the rural power grid safety threshold in the image database. The operation parameters of each node of the urban power grid and each node of the rural power grid are uploaded to the urban power grid monitoring host and the rural power grid monitoring host respectively. The urban power grid monitoring host forwards the operation parameters of each node of the urban power grid to the urban power grid monitoring server. The urban power grid monitoring server compares with the infrared imaging parameters of the transmission line and the voltage and current parameters stored in the image database respectively. When the infrared imaging parameters are abnormal, it is determined that the operation of each node of the urban power grid and each node of the rural power grid is normal.

[0038] When the operation of an urban power grid node is abnormal, switch the transmission lines of the normal nodes of the urban power grid, cut off the transmission line between the abnormal urban power grid node and the rural power grid, switch the transmission lines normally connected to the rural power grid. The urban power grid monitoring server sends an abnormal signal to the urban power grid monitoring host. The urban power grid monitoring host sends a control instruction to the DTU of the urban power grid switchgear according to the received abnormal signal to control the disconnection of the transmission line of the corresponding node. At the same time, the urban power grid monitoring host controls the cutting off of the transmission line between the corresponding node and the rural power grid. At the same time, the urban power grid switchgear sends a switching instruction to the DTU of the rural power grid substation, and the DTU of the rural power grid substation switches the transmission lines normally connected to the rural power grid.

[0039] When the operation of a rural power grid node is abnormal, cut off the transmission line between the abnormal rural power grid node and the urban power grid, switch the transmission lines of the normal nodes of the rural power grid. The rural power grid monitoring host forwards the operation parameters of each node of the rural power grid to the rural power grid monitoring server. The rural power grid monitoring server compares with the infrared imaging parameters of the transmission line stored in the image database. When the infrared imaging parameters are abnormal, the rural power grid monitoring server sends an abnormal signal to the rural power grid monitoring host. The rural power grid monitoring host sends a control instruction to the DTU of the rural power grid substation according to the received abnormal signal to control the disconnection of the transmission line of the corresponding node. At the same time, the DTU of the rural power grid substation sends a control instruction to the DTU of the urban power grid switchgear, and the DTU of the urban power grid switchgear controls the disconnection of the transmission line between the urban power grid and the rural power grid. At the same time, the DTU of the rural power grid substation switches the transmission lines of the normal nodes of the rural power grid.

[0040] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. A three-remote fault monitoring system for distribution automation based on an image database, characterized in that It includes an urban network monitoring server and a rural network monitoring server. Both the urban network monitoring server and the rural network monitoring server are communicatively connected to the distribution network automation dispatching system and the image database. The urban network monitoring server is communicatively connected to an urban network monitoring host, and the urban network monitoring host is respectively communicatively connected to an urban network FTU, an urban network switch station DTU, and an urban network power consumption load end TTU. The urban network FTU is electrically connected to an urban network infrared monitoring end. The rural network monitoring server is communicatively connected to a rural network monitoring host, and the rural network monitoring host is respectively communicatively connected to a rural network FTU, a rural network substation DTU, and a rural network power consumption load end TTU. The rural network FTU is electrically connected to a rural network infrared monitoring end. The urban network switch station DTU is respectively communicatively connected to the rural network FTU and the rural network substation DTU. Both the urban network switch station DTU and the rural network substation DTU include a central processing unit. The central processing unit is respectively electrically connected to a remote control interface unit, a telemetry interface unit, and a telecommunication interface unit. The central processing unit is electrically connected to a communication unit, and the central processing unit is respectively electrically connected to a first power supply unit and a second power supply unit. A monitoring method applicable to the distribution automation three-remote fault monitoring system described above includes the following steps: Obtain the operation parameters of each node in the urban network and the operation parameters of each node in the rural network. According to the preset urban network operation safety threshold and rural network operation safety threshold in the image database, determine whether the operation of each node in the urban network and each node in the rural network is normal. When the operation of an urban network node is abnormal, switch the transmission line of the normal urban network node, cut off the transmission line between the abnormal urban network node and the rural network, and switch the transmission line normally connected to the rural network. When the operation of a rural network node is abnormal, cut off the transmission line between the abnormal rural network node and the urban network, and switch the transmission line of the normal rural network node.

2. The distribution automation three-remote fault monitoring system based on an image database according to claim 1, wherein The urban network monitoring host and the rural network monitoring host are respectively communicatively connected to the urban network monitoring server and the rural network monitoring server through a communication bus. The urban network monitoring host is communicatively connected to the urban network FTU, the urban network switch station DTU, and the urban network power consumption load end TTU through a wireless communication network. The rural network monitoring host is communicatively connected to the rural network FTU, the rural network substation DTU, and the rural network power consumption load end TTU through a wireless communication network. The urban network switch station DTU is communicatively connected to the rural network FTU and the rural network substation DTU through a wireless communication network.

3. The distribution automation three-remote fault monitoring system based on an image database according to claim 1, characterized in that, Both the urban network infrared monitoring end and the rural network infrared monitoring end include an infrared imager. The infrared imager is electrically connected to the urban network FTU and the rural network FTU through a signal line.

4. The distribution automation three-remote fault monitoring system based on an image database according to claim 1, characterized in that The first power supply unit includes an induction iron core. The induction iron core is sleeved on the transmission line. The induction iron core is electrically connected to a first control switch through a rectifying and filtering circuit. The first control switch is respectively electrically connected to the second power supply unit, the central processing unit, and a power management chip. The power management chip is respectively electrically connected to the second power supply unit and the central processing unit.

5. The distribution automation three-remote fault monitoring system based on an image database according to claim 4, characterized in that The second power supply unit includes a backup battery, the backup battery is electrically connected to the power management chip, the backup battery is electrically connected to the rectifier and filter circuit through the first control switch, and the backup battery is electrically connected to the central processor through the second control switch.

6. The three-remote fault monitoring system for distribution automation based on an image database according to claim 5, wherein The first control switch includes a first relay, and the second control switch includes a second relay; the number of the first relays is two groups, one ends of the two groups of first relays are both electrically connected to the rectifier and filter circuit, and the other ends of the two groups of first relays are respectively electrically connected to the backup battery and the central processor.

7. The three-remote fault monitoring system for distribution automation based on an image database according to claim 1, characterized in that, Both the urban network FTU and the rural network FTU include a first power supply unit and a second power supply unit.

Images