A fault indication system for networked ring main unit based on redundancy technology

Abstract

The present invention discloses a networked ring main unit fault indication system based on redundant technology, including a front end and a back end connected in communication; the back end includes a command center, a mobile inspection module and a data storage server connected in communication with each other; the front end includes a plurality of ring main unit fault indication modules, the ring main unit fault indication module receives information from adjacent ring main unit fault indication modules, and the ring main unit fault indication module sends the received information together with its own information to the back end; each ring main unit fault indication module includes a plurality of interval fault indication modules, and any node interval has two interval fault indication modules for detection. The present invention uses multiple designs of redundant technology to use two different ring main unit fault indication systems for simultaneous detection for the same interval node, thereby reducing false alarms and misreports of fault information caused by the fault of the ring main unit itself, saving manpower and time.

Description

Technical Field

[0001] The invention relates to the field of ring main unit faults, and in particular to a networked ring main unit fault indication system based on redundancy technology. Background Art

[0002] With the development of society, power users have higher and higher requirements for power supply reliability. Due to external force damage, equipment aging and other reasons, power equipment failures still occur from time to time. Restoring power supply as soon as possible after a failure is an urgent need for people's production and life. When a cable fault occurs, the main means of auxiliary fault finding is for personnel to go to the site to check the fault indicator signal on the ring network cabinet, lock the fault range after analyzing and judging multiple signals, and conduct key inspections on the range until the location of the fault point is found to carry out emergency repairs. Due to the fact that the fault indicator signal cannot be transmitted far, the fault location cannot be quickly located, which in turn affects the time it takes to restore power after a cable line fault, and does not meet the user's demand for rapid power restoration after a fault.

[0003] A "distribution network fault indication system" disclosed in Chinese patent documents, with a publication number of CN106680659A and a publication date of 2017-05-17, includes: multiple fault indicators, a fault signal transceiver, a fault location unit and a distribution network operation display screen; wherein, multiple fault indicators are installed on power cables, cabinets, ring network cabinets and cable branch boxes, and are all connected to the fault signal transceiver; the fault signal transceiver is connected to the fault location unit; the fault location unit is connected to the distribution network operation display screen, and the fault location unit and the distribution network operation display screen are both arranged in the main control room of the front-end substation or power supply station of the distribution network. The invention can send the fault point information to the main control room of the front-end substation or power supply station in time after a fault occurs in the distribution network, so as to eliminate the fault in time. However, when the fault indicator or the ring network cabinet itself fails, causing a false alarm of a power grid cable fault or an error in the fault information, the relevant personnel will not be able to deal with the problem in time due to the wrong information, wasting a lot of manpower and time. Summary of the invention

[0004] The present invention aims to overcome the problem of false alarm and erroneous reporting of fault information in the prior art caused by fault indicators or the ring main unit itself in the fault indication system of the ring main unit, and provides a networked ring main unit fault indication system based on redundant technology. Two different ring main unit fault indication systems are used for simultaneous detection of the same interval node, thereby reducing false alarm and erroneous reporting of fault information caused by faults of the ring main unit itself, saving manpower and time.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A networked ring main unit fault indication system based on redundant technology comprises a front end, the front end is communicatively connected with a back end; the back end comprises a command center, a mobile inspection module and a data storage server which are communicatively connected with each other; the front end comprises a plurality of ring main unit fault indication modules, the ring main unit fault indication module receives information from adjacent ring main unit fault indication modules, and the ring main unit fault indication module sends the received information together with its own information to the back end; each of the ring main unit fault indication modules comprises a plurality of interval fault indication modules.

[0007] In the present invention, the entire networked ring main unit fault indication system is powered by the ring main unit's own power supply; the command center serves as the hub for information exchange, and relevant personnel can directly understand the specific situation of each ring main unit in the command center; and the mobile inspection module includes a mobile phone app for maintenance personnel, a mobile inspection vehicle, etc., so that relevant personnel can check the situation of the ring main unit anytime and anywhere; the database storage server is used to store all historical data and fault maintenance records collected by the command center. The ring main unit fault indication module sends its own information to nearby ring main units, and also sends the received information of nearby ring main unit indication modules and its own information to the background, so that one piece of information can be transmitted to the background through multiple different channels, avoiding the problem that the fault information of the interval node detected by a ring main unit fault indication module cannot be transmitted to the command center due to a problem with the module, and the relevant fault information can be transmitted using the ring main unit fault indication module near the module.

[0008] Preferably, the i-th ring main unit fault indication module includes m interval fault indication modules, which provide fault indications for m specific node intervals; and the ring main unit fault indication modules other than the i-th ring main unit fault indication module are provided with a total of m interval fault indication modules, which provide fault indications for the m specific node intervals.

[0009] The purpose of the present invention is to use two interval fault indication modules for the detection of each node interval, and the two interval fault indication modules belong to two different ring network cabinet fault indication modules. Therefore, when a ring network cabinet fault indication module has a problem and cannot detect a specific node interval, another ring network cabinet fault indication module can continue to detect the node interval, and the node interval fault will not be falsely reported or misreported due to the failure of some ring network cabinets.

[0010] Preferably, the ring network cabinet fault indication module includes a communication module, and the communication module includes: a sending unit for sending information to the background and adjacent ring network cabinet fault indication modules; a receiving unit for receiving information from adjacent ring network cabinet fault indication modules; and a storage unit for storing the ring network cabinet's own information and the received information.

[0011] The communication module of the present invention is a wireless communication module, which can reduce the cost of cable connection layout. The storage unit can temporarily store the information of the ring network cabinet fault indication module itself and the received information within a period of time, so that the mobile inspection module can mobilize data nearby to check the working conditions of nearby ring network cabinets.

[0012] Preferably, the ring main unit fault indication module includes a control switch, which is connected to the communication module through the main fault indicator and the backup fault indicator respectively; the control switch is connected to the ring main unit detection module, and the ring main unit detection module controls the connection state of the control switch; the control switch is connected to the outgoing line fault indication module, the incoming line fault indication module and several interval fault indication modules.

[0013] In the present invention, two identical fault indicators are selected as the main fault indicator and the standby fault indicator, which can indicate the situation of the fault. The main fault indicator and the standby fault indicator are connected to the control switch at the same time. When the main fault indicator has a problem, the standby fault indicator can be adjusted to indicate the fault. The control switch selects to use the main fault indicator or the standby fault indicator according to the ring main cabinet information detected by the ring main cabinet detection module.

[0014] Preferably, the control switch includes contact a, contact b, contact c and contact d; when ad is connected, information of the ring network cabinet detection module, the outgoing line fault indication module, the incoming line fault indication module and several interval fault indication modules is transmitted to the total fault indicator through ad; when cd is connected, the information is transmitted to the standby fault indicator through cd.

[0015] The control switch in the present invention includes a control chip and contact a, contact b, contact c and contact d. The control chip controls the connection state of the control switch according to the information input by the ring main unit detection module, and the fault information of the ring main unit detection module, the outgoing line fault indication module, the incoming line fault indication module and the plurality of interval fault indication modules is transmitted to the general fault indicator or the standby fault indicator through the control switch according to the connection state, and then transmitted to the communication module. This prevents the fault information from being mistransmitted or wrongly transmitted due to problems of the general fault indicator or the standby fault indicator.

[0016] Preferably, the ring network cabinet detection module includes: a ring network cabinet self-detection unit, used to detect the working status of each module inside the ring network cabinet; a current detection unit, used to detect the current size in the ring network cabinet; a temperature detection unit, used to detect the temperature in the ring network cabinet; a humidity detection unit, used to detect the humidity in the ring network cabinet, and the ring network cabinet self-detection unit can control the connection status of the control switch.

[0017] The ring network cabinet self-check module in the present invention detects the working conditions of each module in the ring network cabinet, and transmits the conditions to the background through the communication module, so that relevant personnel can understand the real-time working conditions of the ring network cabinet; at the same time, a current detection unit, a temperature monitoring unit, a humidity monitoring unit and a particle detection unit are set to monitor the environment and working conditions in the ring network cabinet to ensure that the environment of the ring network cabinet is normal. When the environment is abnormal, information alarm can be transmitted to wait for maintenance personnel to check.

[0018] Preferably, the outgoing line fault indication module includes an outgoing line fault indicator, which is respectively connected to an outgoing line short circuit detection unit and an outgoing line grounding detection unit, and the short circuit detection unit and the outgoing line grounding detection unit are simultaneously connected to a control switch; the connection method and structure of the incoming line fault indication module are the same as those of the outgoing line fault indication module.

[0019] Preferably, the bay fault indication module comprises a bay fault indicator, the bay fault indicator is respectively connected to a bay short circuit detection unit and a bay grounding detection unit, and the bay short circuit detection unit and the bay grounding detection unit are simultaneously connected to a control switch.

[0020] In the present invention, the connection method of the input and output line fault indication module and the interval fault indication module is the same. The short circuit detection unit and the grounding detection unit are connected in parallel, and their detection signals are simultaneously transmitted to the fault indicator and the control switch. Therefore, the fault indicator can indicate the fault problem, but when the fault indicator is damaged, it will not affect the fault information transmitted to the control switch, and will not cause false alarm or wrong alarm of the fault information.

[0021] The present invention has the following beneficial effects: two interval fault indication modules are used to detect the same node interval, and the two interval fault indication modules belong to two different ring network cabinet fault indication systems, thereby avoiding false fault reports or erroneous reports caused by problems of a single interval fault indication module; a total fault indicator and a standby fault indicator are arranged inside the ring network cabinet fault indication module, and redundant technology is used to ensure the correct determination of fault indications and the accuracy of information transmission; a ring network cabinet fault indication system can send its own information to a nearby ring network cabinet fault indication system, and can send the received information together with its own information to the background at the same time, and can send the same information through multiple channels, thereby ensuring the stability and accuracy of information transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the fault indication system of the networked ring main unit in the present invention;

[0023] Figure 2 It is a schematic diagram of a ring main unit fault indication module in a ring main unit in the present invention;

[0024] Figure 3It is a schematic diagram of an incoming and outgoing line fault indication module and a bay fault indication module in the present invention. DETAILED DESCRIPTION

[0025] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0026] like Figure 1 As shown, a networked ring main unit fault indication system based on redundant technology includes a front end and a back end connected in communication; the back end includes a command center, a mobile inspection module and a data storage server connected in communication with each other; the front end includes a plurality of ring main unit fault indication modules, the ring main unit fault indication module receives information from adjacent ring main unit fault indication modules, and the ring main unit fault indication module sends the received information together with its own information to the back end; each ring main unit fault indication module includes a plurality of interval fault indication modules.

[0027] Among the n ring main unit fault indication modules, the i-th ring main unit fault indication module includes m interval fault indication modules, which provide fault indications for m specific node intervals; the n-1 ring main unit fault indication modules other than the i-th ring main unit fault indication module are provided with a total of m interval fault indication modules, which provide fault indications for these m specific node intervals.

[0028] like Figure 2 As shown, the ring network cabinet fault indication module includes a communication module, and the communication module includes: a sending unit, used to send information to the background and adjacent ring network cabinet fault indication modules; a receiving unit, used to receive information from adjacent ring network cabinet fault indication modules; a storage unit, used to store the ring network cabinet's own information and the received information.

[0029] The ring main unit fault indication module includes a control switch, which is connected to the communication module through the main fault indicator and the standby fault indicator respectively; the control switch is connected to the ring main unit detection module, and the ring main unit detection module controls the connection state of the control switch; the control switch is connected to the outgoing line fault indication module, the incoming line fault indication module and several interval fault indication modules.

[0030] The control switch includes contact a, contact b, contact c and contact d; when ad is connected, the information of the ring network cabinet detection module, the outgoing line fault indication module, the incoming line fault indication module and several interval fault indication modules is transmitted to the general fault indicator through ad; when cd is connected, the information is transmitted to the standby fault indicator through cd.

[0031] The ring network cabinet detection module includes: a ring network cabinet self-test unit, which is used to detect the working status of each module inside the ring network cabinet; a current detection unit, which is used to detect the current size in the ring network cabinet; a temperature detection unit, which is used to detect the temperature in the ring network cabinet; a humidity detection unit, which is used to detect the humidity in the ring network cabinet. The ring network cabinet self-test unit can control the connection status of the control switch.

[0032] like Figure 3 As shown, the outgoing line fault indication module includes an outgoing line fault indicator, which is respectively connected to the outgoing line short circuit detection unit and the outgoing line grounding detection unit, and the short circuit detection unit and the outgoing line grounding detection unit are simultaneously connected to the control switch; the connection mode and structure of the incoming line fault indication module are the same as those of the outgoing line fault indication module. The interval fault indication module includes an interval fault indicator, which is respectively connected to the interval short circuit detection unit and the interval grounding detection unit, and the interval short circuit detection unit and the interval grounding detection unit are simultaneously connected to the control switch.

[0033] In the present invention, the entire networked ring main unit fault indication system is powered by the ring main unit's own power supply; the command center serves as the hub for information exchange, and relevant personnel can directly understand the specific situation of each ring main unit in the command center; and the mobile inspection module includes a mobile phone app for maintenance personnel, a mobile inspection vehicle, etc., so that relevant personnel can check the situation of the ring main unit anytime and anywhere; the database storage server is used to store all historical data and fault maintenance records collected by the command center. The ring main unit fault indication module sends its own information to nearby ring main units, and also sends the received information of nearby ring main unit indication modules and its own information to the background, so that one piece of information can be transmitted to the background through multiple different channels, avoiding the problem that the fault information of the interval node detected by a ring main unit fault indication module cannot be transmitted to the command center due to a problem with the module, and the relevant fault information can be transmitted using the ring main unit fault indication module near the module.

[0034] The purpose of the present invention is to use two interval fault indication modules for the detection of each node interval, and the two interval fault indication modules belong to two different ring network cabinet fault indication modules. Therefore, when a ring network cabinet fault indication module has a problem and cannot detect a specific node interval, another ring network cabinet fault indication module can continue to detect the node interval, and the node interval fault will not be falsely reported or misreported due to the failure of some ring network cabinets.

[0035] The communication module of the present invention is a wireless communication module, which can reduce the cost of cable connection layout. The storage unit can temporarily store the information of the ring network cabinet fault indication module itself and the received information within a period of time, so that the mobile inspection module can mobilize data nearby to check the working conditions of nearby ring network cabinets.

[0036] In the present invention, two identical fault indicators are selected as the main fault indicator and the standby fault indicator, which can indicate the situation of the fault. The main fault indicator and the standby fault indicator are connected to the control switch at the same time. When the main fault indicator has a problem, the standby fault indicator can be adjusted to indicate the fault. The control switch selects to use the main fault indicator or the standby fault indicator according to the ring main cabinet information detected by the ring main cabinet detection module.

[0037] The control switch in the present invention includes a control chip and contact a, contact b, contact c and contact d. The control chip controls the connection state of the control switch according to the information input by the ring main unit detection module, and the fault information of the ring main unit detection module, the outgoing line fault indication module, the incoming line fault indication module and the plurality of interval fault indication modules is transmitted to the general fault indicator or the standby fault indicator through the control switch according to the connection state, and then transmitted to the communication module. This prevents the fault information from being mistransmitted or wrongly transmitted due to problems of the general fault indicator or the standby fault indicator.

[0038] The ring network cabinet self-check module in the present invention detects the working conditions of each module in the ring network cabinet, and transmits the conditions to the background through the communication module, so that relevant personnel can understand the real-time working conditions of the ring network cabinet; at the same time, a current detection unit, a temperature monitoring unit, a humidity monitoring unit and a particle detection unit are set to monitor the environment and working conditions in the ring network cabinet to ensure that the environment of the ring network cabinet is normal. When the environment is abnormal, information alarm can be transmitted to wait for maintenance personnel to check.

[0039] In the present invention, the connection method of the input and output line fault indication module and the interval fault indication module is the same. The short circuit detection unit and the grounding detection unit are connected in parallel, and their detection signals are simultaneously transmitted to the fault indicator and the control switch. Therefore, the fault indicator can indicate the fault problem, but when the fault indicator is damaged, it will not affect the fault information transmitted to the control switch, and will not cause false alarm or wrong alarm of the fault information.

[0040] In the embodiment of the present invention, all ring network cabinets adopt a two-input and four-output connection mode, that is, there is one incoming line fault indication module, one outgoing line fault indication module and four interval fault indication modules. The first ring network cabinet fault indication module can detect interval No. 1, interval No. 2, interval No. 3 and interval No. 4; the second ring network cabinet fault indication module can detect interval No. 3, interval No. 4, interval No. 5 and interval No. 6; the third ring network cabinet fault indication module can detect interval No. 5, interval No. 6, interval No. 7 and interval No. 8, and so on. Each node interval has two adjacent ring network cabinet indication modules to detect and indicate faults.

[0041] During the initial normal operation, the control switch ad in the fault indication module of the ring main unit is in a connected state. At this time, the entire power grid line is operating normally, and the ring main unit itself is also operating normally.

[0042] When there is a fault in the incoming line or outgoing line, the faulty part of the switch will be disconnected. At this time, after the fault is detected, the corresponding incoming line fault indicator or outgoing line fault indicator will indicate the fault. At the same time, the fault information is transmitted to the total fault indicator through the ad of the control switch to indicate the fault and transmitted to the communication module, and the fault information is sent to the background and adjacent ring network cabinets.

[0043] When a partial outgoing line fault occurs in an interval, the two interval fault indication modules detecting the interval will indicate the fault and send the fault information to their respective total fault indication modules and communication modules, and send the fault information to the background and nearby ring network cabinets.

[0044] When the ring main unit detection module detects that the ring main unit is faulty, the following situations occur:

[0045] When the current detection unit, temperature detection unit, humidity detection unit and particle detection unit detect the inside of the ring network cabinet, it is found that the detection data exceeds the threshold range, indicating that the ring network cabinet may fail at any time. At this time, the ring network cabinet detection module controls the bd connection of the control switch, the ring network cabinet temporarily stops working, and the communication module sends fault warning information to the adjacent ring network cabinet and the background, informing the maintenance personnel to come to the field to detect the problem. At this time, because the ring network cabinet stops working, the four interval fault indication modules of the specific four node intervals responsible for the ring network cabinet stop detecting work, but after the adjacent ring network cabinet receives the information that the ring network cabinet stops working, there are still four interval fault indication modules for these four node intervals to perform detection work, and the specific fault information of these four node intervals will be sent to the background. This ensures that the failure of a single ring network cabinet will not affect the fault detection of the power grid line interval, avoiding false alarms or misreporting of fault information.

[0046] When the self-test unit of the ring main unit detects the internal modules of the ring main unit: if a fault is detected in the incoming and outgoing line fault indicator or the interval fault indicator, the fault information is transmitted to the communication module through the total fault indicator and sent, but due to the connection method of the incoming and outgoing line fault module and the interval fault module, the fault information will not be affected and is still correct, so the ring main unit fault indication system can still work, and the fault indication of the total fault indicator is still correct. If a problem is detected with the total fault indicator, the ring main unit detection module can control the cd connection of the control switch, and the fault information is transmitted to the communication module through the backup fault indicator and sent, and the fault information of the total fault indicator is also sent to notify the maintenance personnel to perform maintenance. If a problem is detected in the communication module, the communication module is directly controlled to stop working. At this time, the background and adjacent ring main units will not be able to receive information from the ring main unit, so the maintenance personnel will be notified to go for inspection and maintenance. If problems are detected in other modules, different options can be made according to the pre-set severity levels. When the probability of failure is low, the ring main unit can still work, but the fault information will be sent through the communication module; when the probability of failure is high, the ring main unit will stop working, and the adjacent ring main unit will detect the four node intervals that the ring main unit is responsible for, and send fault information to notify maintenance personnel for repair.

[0047] In this embodiment, the command center receives all the information and processes it, summarizes and analyzes the fault information of each ring network cabinet, and sends the information of the faulty ring network cabinet and the node interval to the mobile inspection module. After receiving the fault information, the maintenance personnel's mobile app or mobile inspection vehicle can directly reach the corresponding fault location for inspection. In addition, since the ring network cabinet fault indication system transmits the fault information to the background and adjacent ring network cabinets through wireless communication, the mobile inspection module can receive the fault information sent by the ring network cabinet near its location, and can go directly to the fault location for inspection without going through the command center, and then report to the command center, which can greatly shorten the time for fault handling and positioning, and improve the efficiency of maintenance work. At the same time, after receiving the warning information, you can go to the warning ring network cabinet to check the warning cause of the ring network cabinet, eliminate potential fault factors, and reduce the risk of failure of the ring network cabinet. In addition, when inspecting and repairing a single ring main unit, the ring main unit can be isolated, and the four node intervals it is responsible for detecting are detected by the interval fault indicators of the adjacent ring main units. Then the ring main unit is powered off for maintenance, which can ensure the safety of the maintenance personnel and prevent contact, and at the same time, the fault information collection of the node intervals can be continued during maintenance.

[0048] The above embodiments are further elaborations and illustrations of the present invention for ease of understanding, and are not limitations of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A networked ring main unit fault indication system based on redundancy technology, characterized in that: It includes a front end, which is connected to a back end by communication; the back end includes a command center, a mobile inspection module and a data storage server that are connected to each other by communication; the front end includes a plurality of ring network cabinet fault indication modules, the ring network cabinet fault indication module receives information from adjacent ring network cabinet fault indication modules, and the ring network cabinet fault indication module sends the received information together with its own information to the back end; each of the ring network cabinet fault indication modules includes a plurality of interval fault indication modules; The i-th ring main unit fault indication module includes m interval fault indication modules, which provide fault indication for m specific node intervals; the ring main unit fault indication modules other than the i-th ring main unit fault indication module are provided with a total of m interval fault indication modules, which provide fault indication for the m specific node intervals.

2. According to the redundant technology-based networking ring main unit fault indication system of claim 1, it is characterized in that: The ring main unit fault indication module includes a communication module, which includes: a sending unit for sending information to the background and adjacent ring main unit fault indication modules; a receiving unit for receiving information from adjacent ring main unit fault indication modules; and a storage unit for storing the ring main unit's own information and the received information.

3. According to the redundant technology-based networking ring main unit fault indication system of claim 1, it is characterized in that: The ring main unit fault indication module includes a control switch, which is connected to the communication module through the main fault indicator and the standby fault indicator respectively; the control switch is connected to the ring main unit detection module, and the ring main unit detection module controls the connection state of the control switch; the control switch is connected to the outgoing line fault indication module, the incoming line fault indication module and several interval fault indication modules.

4. A networked ring main unit fault indication system based on redundancy technology according to claim 3, characterized in that: The control switch includes contact a, contact b, contact c and contact d; when ad is connected, the information of the ring network cabinet detection module, the outgoing line fault indication module, the incoming line fault indication module and several interval fault indication modules is transmitted to the general fault indicator through ad; when cd is connected, the information is transmitted to the standby fault indicator through cd.

5. The networked ring main unit fault indication system based on redundant technology according to claim 3 is characterized in that: The ring network cabinet detection module includes: a ring network cabinet self-test unit, which is used to detect the working status of each module inside the ring network cabinet; a current detection unit, which is used to detect the current size in the ring network cabinet; a temperature detection unit, which is used to detect the temperature in the ring network cabinet; and a humidity detection unit, which is used to detect the humidity in the ring network cabinet. The ring network cabinet self-test unit controls the connection status of the control switch.

6. The networked ring main unit fault indication system based on redundancy technology according to claim 3 is characterized in that: The outgoing line fault indication module comprises an outgoing line fault indicator, the outgoing line fault indicator is respectively connected to an outgoing line short circuit detection unit and an outgoing line grounding detection unit, and the outgoing line short circuit detection unit and the outgoing line grounding detection unit are simultaneously connected to a control switch; The connection mode and structure of the incoming line fault indication module are the same as those of the outgoing line fault indication module.

7. A networked ring main unit fault indication system based on redundancy technology according to claim 1 or 3, characterized in that: The bay fault indication module comprises a bay fault indicator, which is respectively connected to a bay short circuit detection unit and a bay grounding detection unit, and the bay short circuit detection unit and the bay grounding detection unit are simultaneously connected to a control switch.

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