Power distribution area equipment state monitoring system

Abstract

The invention relates to a power distribution area equipment state monitoring system which comprises a collection unit serving as a collection node and a plurality of hierarchical distribution units serving as distribution nodes, an intelligent fusion terminal is mounted at the collection unit, and the collection unit is in communication connection with the plurality of distribution units through a communication holder mechanism and pulse type power frequency signals. One distribution unit connected with the collection unit serves as a first-level distribution node to be connected with the multiple distribution units, and one distribution unit connected with the first-level distribution node serves as a second-level distribution node to be connected with the multiple distribution units. One distribution unit connected with the second-level distribution node serves as a third-level distribution node and is connected with a plurality of user meter boxes; a plurality of distribution units located at the first-stage distribution node and the second-stage distribution node are connected with a plurality of cover-type FTUs (Feeder Terminal Units); the method has the advantages of identifying the topological structure of the transformer area, realizing fault positioning and quickly recovering power supply.

Description

Technical Field

[0001] The invention belongs to the technical field of distribution station area monitoring, and in particular relates to a distribution station area equipment status monitoring system. Background Art

[0002] The distribution station area is the power supply area from a single distribution transformer to the user, realizing power distribution, continuously providing electricity to users, and ensuring normal power consumption in an area. With the increase of various electrical equipment in life and work, the overall power demand is also increasing, which undoubtedly increases the load on the distribution station area. Under heavy load pressure or other factors, failures are inevitable in the distribution station area, such as short circuit, leakage or equipment failure in the distribution station area, which directly affect the power supply quality and reliability of the distribution station area. Therefore, it is particularly important to realize the control of the operating status of the distribution station area; however, in the related technology, the monitoring of the operating status of the distribution station area mainly relies on the distribution terminal, the meter and manual work, and it is impossible to achieve refined management. In particular, once a fault occurs in the line of the distribution station area The fault cannot be accurately located, emergency repairs cannot be carried out in time, and the power supply quality and reliability of the distribution station area cannot be guaranteed. In addition, with the rapid increase in the number of electricity users, the topological structure information of the distribution network needs to be obtained first in the process of intelligent electricity management. At present, the management of the substation electric energy meters mainly relies on the meter reading files of the centralized reading system, that is, the maintenance personnel of the low-voltage substation observe the power failure and analyze the meter reading data to record the faulty equipment in the low-voltage substation. In reality, due to the transfer of maintenance personnel or the transformation of branches, the constructed substation topology structure will be blurred, so the positioning accuracy of the faulty equipment will be reduced. Therefore, it is very necessary to provide a distribution station equipment status monitoring system that can identify the substation topology, locate the fault, and quickly restore power supply. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a distribution substation equipment status monitoring system that can identify the substation topology, locate faults, and quickly restore power supply.

[0004] The objective of the present invention is achieved as follows: a distribution station area equipment status monitoring system, which includes a collection unit as a collection node and multiple distribution units in a hierarchical structure as distribution nodes, wherein an intelligent fusion terminal is installed at the collection unit, and the collection unit establishes a communication connection with multiple distribution units through a communication pan-tilt mechanism and a pulsed industrial frequency signal, one of the distribution units connected to the collection unit is connected to multiple distribution units as a first-level distribution node, one of the distribution units connected to the first-level distribution node is connected to multiple distribution units as a second-level distribution node, and one of the distribution units connected to the second-level distribution node is connected to multiple user meter boxes as a third-level distribution node; multiple distribution units located at the first-level distribution node and the second-level distribution node are all connected to a number of cover-type FTUs.

[0005] The distribution units are connected via wireless communication and / or optical fiber communication; the cover-type FTU is installed on the overhead line of the distribution network through a protective bracket, and the cover-type FTU is connected to the voltage transformer through a control cable and to the 10KV vacuum circuit breaker through a collection cable.

[0006] The cover-type FTU is internally provided with a collection module and a main control module, and the collection module is connected with the main control module.

[0007] The protective bracket includes a base plate, and support arms are installed on both side ends of the base plate. The upper ends of the support arms are connected by mounting sleeves. The cover-type FTU is fixed inside the mounting sleeve. A damping rod is arranged on the upper inner side of the base plate. One end of the damping rod is connected to the base plate and the other end is connected to the middle part of the corresponding support arm. A spring is installed on the outer sleeve of the damping rod.

[0008] The intelligent fusion terminal establishes a wireless connection with the cover-type FTU located in the distribution unit through a communication pan-tilt mechanism. The LTU device of the distribution unit actively generates a pulsed industrial frequency low-power characteristic signal, and issues a trigger command based on the local wireless network of the substation. The aggregation unit detects the characteristic signal on the bus and uses micro-current topology recognition technology. According to the similarity of the corresponding pulse sequence signal detected by the LTU device of each distribution unit, the front-and-back logical relationship is judged. The front-and-back relationship and parallel relationship of the topological network nodes are determined by the traversal search algorithm, thereby realizing the automatic recognition of the electrical physical topology of the "distribution transformer-branch-meter box" in the substation.

[0009] The communication pan-tilt mechanism includes a base, a mounting flange is arranged below the base, a heat sink is arranged on the side of the base, a rotating seat with a "U"-shaped structure is movably installed above the base, and a pulse-type industrial frequency signal transceiver and a wireless communication transceiver are respectively arranged on the rotating seat.

[0010] The communication pan-tilt mechanism identifies and receives the pulsed industrial frequency low-power characteristic signal actively generated by the LTU device of the distribution unit through a pulsed industrial frequency signal transceiver; the communication pan-tilt mechanism establishes a wireless connection with the cover-type FTU located in the distribution unit through a wireless communication transceiver.

[0011] A turntable rotatably connected to the mounting flange is disposed on the bottom surface of the base, a first spur gear connected to the turntable shaft is disposed inside the base, one side of the first spur gear is dynamically connected to a first gear-type servo motor assembly, and the other side of the first spur gear is dynamically connected to a first gear-type rotary encoder.

[0012] A first side cover and a second side cover are respectively provided on both sides of the base, and the first side cover and the second side cover are connected to the rotating seat through deep groove ball bearings. A second spur gear that penetrates the second side cover and is connected to the rotating seat shaft is provided on the upper side inside the base, and one side of the second spur gear is poweredly connected to a second gear-type servo motor assembly, and the other side is poweredly connected to a second gear-type rotary encoder.

[0013] A group of arc-shaped stop disks are arranged at intervals on the outer circumference of the second side cover, and stoppers are arranged between the stop disks.

[0014] Beneficial effects of the invention: The invention is a distribution substation equipment status monitoring system. In use, the cover-type FTU of the invention is located in the distribution unit, and the cover-type FTU is installed on the overhead line of the distribution network through a protective bracket, and is respectively connected to a voltage transformer and a 10KV vacuum circuit breaker. The protective bracket provides a good protection function for the cover-type FTU, ensuring that it can operate stably and reliably; the distribution unit connects multiple cover-type FTUs and the distribution units communicate through wireless or optical fiber to realize centralized or local protection functions, and realizes functions such as fault location, fault isolation and rapid power supply restoration in non-fault areas, greatly improving the power supply reliability and ensuring the stable operation of the line; the intelligent fusion terminal of the invention is connected to the distribution unit through a communication pan-tilt mechanism, and the communication pan-tilt mechanism can adopt wireless and power frequency signal dual communication modes, and can also adjust the angle and direction according to actual installation requirements, greatly improving practicality; the invention realizes refined monitoring of the operating status of the distribution substation through the intelligent fusion terminal, timely predicts and repairs faults, improves the fault response speed, and ensures the power supply quality and reliability of the distribution substation; the invention has the advantages of identifying the substation topology, realizing fault location, and rapidly restoring power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the composition structure of the present invention.

[0016] Figure 2 It is a schematic diagram of the installation structure of the cover-type FTU and the protective bracket of the present invention.

[0017] Figure 3 It is a schematic structural diagram of the protective bracket of the present invention.

[0018] Figure 4 It is a bottom view of the cover-type FTU of the present invention.

[0019] Figure 5 For the present invention Figure 4 A partial enlarged schematic diagram of the structure.

[0020] Figure 6 It is a structural schematic diagram of the acquisition module of the present invention.

[0021] Figure 7 It is a structural schematic diagram of the main control module of the present invention.

[0022] Figure 8 This is the overcurrent I (II, III) stage protection logic diagram of the present invention.

[0023] Fig. 9 This is the zero-flow I-segment protection logic diagram of the present invention.

[0024] Fig.10 It is a schematic diagram of the structure of the communication pan-tilt mechanism of the present invention when viewed from above.

[0025] Fig.11 It is a schematic diagram of part of the internal structure of the communication pan-tilt mechanism of the present invention.

[0026] Fig.12 This is a working principle diagram of the intelligent fusion terminal of the substation area of ​​the present invention.

[0027] Fig.13 It is a structural schematic diagram of the intelligent fusion terminal of the present invention.

[0028] Fig.14 It is a structural schematic diagram of the indicator light of the present invention.

[0029] Fig.15 It is a schematic diagram of the interface layout of the high-voltage heavy-duty connector of the present invention.

[0030] In the figure: 1, cover-type FTU 2, protective bracket 21, bottom plate 22, support arm 23, mounting sleeve 24, damping rod 25, spring 3, intelligent fusion terminal 4, communication pan-tilt mechanism 41, base 42, mounting flange 43, radiator 44, rotating seat 45, pulse-type industrial frequency signal transceiver 46, wireless communication transceiver 47, turntable 48, first spur gear 49, first gear-type servo motor assembly 401, first gear-type rotary encoder 402, first side cover 403, second side cover 404, second spur gear 405, second gear-type servo motor assembly 406, second gear-type rotary encoder 407, stop plate 408, stopper. DETAILED DESCRIPTION

[0031] The present invention will be further described below in conjunction with the accompanying drawings. Example

[0032] like Figure 1-15As shown, a distribution substation equipment status monitoring system includes a collection unit as a collection node and multiple distribution units of a hierarchical structure as distribution nodes. An intelligent fusion terminal 3 is installed at the collection unit. The collection unit establishes communication connection with multiple distribution units through a communication pan-tilt mechanism 4 and a pulsed industrial frequency signal. One of the distribution units connected to the collection unit is connected to multiple distribution units as a first-level distribution node, one of the distribution units connected to the first-level distribution node is connected to multiple distribution units as a second-level distribution node, and one of the distribution units connected to the second-level distribution node is connected to multiple user meter boxes as a third-level distribution node; multiple distribution units located at the first-level distribution node and the second-level distribution node are all connected to a number of cover-type FTUs 1.

[0033] In this embodiment, the feeder terminal (FTU) is an automated controller having functions such as status measurement, signal monitoring, switch control (three remote controls: telemetering, telesignaling, and telecontrol), remote adjustment, remote pulse, communication, and protection. The FTU is installed on the overhead line of the distribution network through a protective bracket, and cooperates with the master station through wireless or optical fiber to realize centralized or local protection functions, and realizes functions such as fault location, fault isolation, and rapid power supply restoration in non-fault areas, which greatly improves the power supply reliability and ensures the stable operation of the line.

[0034] The distribution units are connected by wireless communication and / or optical fiber communication; the cover-type FTU 1 is installed on the overhead line of the distribution network through a protective bracket 2, and the cover-type FTU 1 is connected to the voltage transformer through a control cable (the double-winding PT provides 220V power to the FTU and transmits 100V sampling voltage), and is connected to the 10KV vacuum circuit breaker through a collection cable (the switch body transmits information to the FTU, including switch closing and opening positions, energy storage conditions, and current size); the cover-type FTU can collect switch telesignals, current telemetry, remote / local remote control of switch opening and closing, remote adjustment to modify set values, collect line loss remote pulse information, and switch between centralized / local modes.

[0035] In this embodiment, ① the overall structure of the hood-type FTU is as follows: Figure 4 As shown, it includes: operation panel A, GPRS wireless module B, backup power battery box C, battery box cable interface D (DC24V output), TA: current air socket E, LS: control air socket F, grounding bolt G, running light H (green), SPS: PT air socket I, COM: communication / maintenance port J, fault indicator K (red), BATT: battery box interface L, remote control operation handle M. Among them, TA: current air socket E, each phase pin is separated by a plastic shell baffle. When the current air plug from the switch is inserted into the device, the plastic shell baffle pushes the metal sheet open to ensure the correct phase sequence; if the current air plug from the switch is not inserted into the device, the internal metal sheet will automatically close to ensure that the CT is not open.

[0036] ② Operation panel: Figure 5 As shown, it includes: power light-operation light A1, communication status light A2 (lit when communicating with network port / serial port), conventional protection, local FA, centralized FA indicator light A3 (lit when function is put into use), operation and maintenance serial port A4, fault judgment logic pressure plate A5, serial communication connection wireless module A6, battery input / output A7 (manual activation when using battery), manual reset fault remote signal A8, operation button A9 (when operating the screen, use with the up, down, left and right buttons), hard pressure plate A10 (put into / cut off control circuit), remote (laptop / master station can remotely control the switch) and local (the switch handle can operate the switch) A11.

[0037] The cover-type FTU 1 is internally provided with a collection module and a main control module, and the collection module is connected with the main control module.

[0038] In this embodiment, ① acquisition module: Figure 6 As shown, it includes: SPS power supply / sampling voltage aerial plug B1, 220V / 100V voltage interface B2 transmitted through the SPS aerial plug, dual power switching relay B3, power module output terminal B4 (to charge the battery, transmit AC power failure, battery activation, power fault light signal), AT current aerial plug B5, A, B, C, O, three-phase current and zero-sequence current transformer B6, PCB board output B7 (220V terminal of the power module), power module B8, power module input terminal B9 (ACL220+, ACN220-).

[0039] ② Main control module: Figure 7 As shown, it includes: LS control aviation plug I (transmits switch opening and closing signals, energy storage signals. Controls switch opening and closing, energy storage power supply), BATT battery aviation plug E, opening and closing output C1, zero-sequence voltage sensor C2, residual pressure module C3, plug-in encryption chip C4, which is transmitted through BATT aviation plug, battery positive and negative poles C5, and transmits the switch closing and opening positions and energy storage signals to the main control module C6.

[0040] In this embodiment, the hood-type FTU functions of the present invention are as follows: ① Telemetering function: Telemetering (YC) collection: including analog quantities such as UA, UB, UC, U0, Ia, Ib, Ic, Io, and frequency; the telemetering converts the voltage / current on the primary side into corresponding secondary values ​​through PT / CT; the on-site standard secondary voltage (100V) and current (5A or 1A) are isolated and transformed into weak signals by high-precision small PT and CT and enter the 16-bit A / D conversion chip, and are sent to the processing module for calculation and processing to obtain the following telemetering measurements: two-line voltage, three-phase current and zero-sequence current; total active power; total reactive power; power factor; frequency; zero-sequence current (I0), etc.

[0041] ② Telesignaling function: Telesignaling quantity (YX) collection: Collect telesignaling position change, accident telesignaling and send status quantity to the main station or substation, with event sequence recording (SOE) function, telesignaling resolution is less than 2ms, telesignaling input signal is sent to telesignaling acquisition module for processing after photoelectric isolator in the form of open contact, and the opening and closing state of telesignaling input signal is obtained after filtering; filtering time (telesignaling anti-shake) can be set to ensure that telesignaling position change is generated only when the telesignaling action is stable, reducing false alarms of telesignaling; collecting switch closing and opening status quantity information; collecting terminal power supply status information; collecting virtual telesignals such as terminal fault and abnormal information; telemetering quick break, overcurrent, grounding and other virtual telesignals; collecting switch spring energy storage state.

[0042] ③ Remote control function: The switch can be opened and closed by remote control through FTU; it has a remote / local conversion switch: when the conversion switch is switched to the remote state, remote and automatic operation (protection action) can be realized; when it is in the local state, the local switch can be opened and closed, and the remote operation can be locked; when it is in the self-locking state, the remote control function is locked; the terminal accepts and executes the remote control commands from the master station or substation to complete the switch opening and closing operations; the master station and local remote control records are recorded and saved separately; anti-false operation measures are taken to ensure the reliability of remote control; the action holding time of each remote control contact can be set separately.

[0043] ④Remote adjustment function: Through the master station, remotely read and modify FTU related parameters to achieve convenient operation and maintenance functions (requires cooperation with the master station).

[0044] ⑤ Protection - phase overcurrent, such as Figure 8 As shown in the overcurrent I (II, III) protection logic diagram, Iset is the current setting value of the overcurrent I (II, III) section; Tset: is the time setting value of the overcurrent II (or III) section.

[0045] ⑥ Protection - zero sequence overcurrent, such as Fig. 9 As shown in the zero-current I-stage protection logic diagram, Iset is the current setting value of the zero-current I-stage; Tset is the time setting value of the zero-current I-stage.

[0046] The protective bracket 2 includes a base plate 21, and support arms 22 are installed on both side ends of the base plate 21. The upper ends of the support arms 22 are connected by a mounting sleeve 23. The cover-type FTU 1 is fixed inside the mounting sleeve 23. A damping rod 24 is arranged on the upper inner side of the base plate 21. One end of the damping rod 24 is connected to the base plate 21, and the other end is connected to the middle of the corresponding support arm 22. A spring 25 is installed on the outside of the damping rod 24.

[0047] The present invention is a distribution substation equipment status monitoring system. In use, the cover-type FTU of the present invention is located in the distribution unit. The cover-type FTU is installed on the overhead line of the distribution network through a protective bracket and is respectively connected to a voltage transformer and a 10KV vacuum circuit breaker. The protective bracket 2 provides a good protection function for the cover-type FTU to ensure that it can operate stably and reliably. The distribution unit connects multiple cover-type FTUs and the distribution units communicate with each other through wireless or optical fiber to achieve centralized or local protection functions, fault location, fault isolation, and rapid power supply restoration in non-fault areas, which greatly improves the power supply reliability and ensures the stable operation of the line. The cover-type FTU of the present invention can be locally adopted It integrates analog quantity and status quantity to control the opening and closing of switches; it has the functions of fast and accurate fault detection and fault identification, and has an obvious fault on-site indication signal; it adopts 485 / 232 communication and GPRS wireless communication to enable it to have remote maintenance function, and can perform remote control and remote parameter modification and setting. The GPRS wireless communication module supports the port data monitoring function, monitors the current module status, IP address, heartbeat between the module and the terminal, etc., and has the function of automatic reconnection in case of network interruption; it adopts dual main power supply and backup power supply to ensure that the system operates uninterruptedly and at full power for 24 hours; the present invention has the advantages of identifying the topological structure of the substation, realizing fault location, and quickly restoring power supply. Example

[0048] like Figure 1-15 As shown, a distribution substation equipment status monitoring system includes a collection unit as a collection node and multiple distribution units of a hierarchical structure as distribution nodes. An intelligent fusion terminal 3 is installed at the collection unit. The collection unit establishes communication connection with multiple distribution units through a communication pan-tilt mechanism 4 and a pulsed industrial frequency signal. One of the distribution units connected to the collection unit is connected to multiple distribution units as a first-level distribution node, one of the distribution units connected to the first-level distribution node is connected to multiple distribution units as a second-level distribution node, and one of the distribution units connected to the second-level distribution node is connected to multiple user meter boxes as a third-level distribution node; multiple distribution units located at the first-level distribution node and the second-level distribution node are all connected to a number of cover-type FTUs 1.

[0049] The intelligent fusion terminal 3 establishes a wireless connection with the cover-type FTU 1 located in the distribution unit through the communication pan-tilt mechanism 4. The LTU device of the distribution unit actively generates a pulsed industrial frequency low-power characteristic signal, and issues a trigger command based on the local wireless network of the substation. The collection unit detects the characteristic signal on the bus, and adopts micro-current topology recognition technology. According to the similarity of the corresponding pulse sequence signal detected by the LTU device of each distribution unit, the front-and-back logical relationship is judged, and the front-and-back relationship and parallel relationship of the topological network nodes are determined by the traversal search algorithm, so as to realize the automatic recognition of the electrical physical topology of the "distribution transformer-branch-meter box" in the substation.

[0050] In this embodiment, the intelligent fusion terminal of the present invention adopts a modular, scalable, low-power, and maintenance-free design, can adapt to complex operating environments, has high reliability and stability, and meets the functional requirements of power supply and consumption information collection, equipment status monitoring and communication networking, local analysis and decision-making, master station communication and collaborative computing in the user's distribution station area; the intelligent fusion terminal has excellent electromagnetic compatibility and can resist interference from high-voltage spike pulses, static electricity and lightning surges; it has a wide temperature adaptive capability range; the wide voltage range makes it more reliable; the device parameters can be conveniently modified locally / remotely; the large-capacity FLASH storage chip ensures convenient storage of various data; the micro-current topology recognition technology is adopted, which can effectively realize the topology recognition of the user station area. The working principle diagram of the intelligent fusion terminal is shown in FIG. Fig.12 shown.

[0051] ①10kV distribution network terminal data acquisition: three-phase voltage and current on the low-voltage side of the transformer (branch current information can be expanded); temperature information of the substation, including transformer temperature, switch node temperature, JP cabinet temperature, reactive compensation capacitor, etc.; real-time information read by the concentrator, including the meter number, voltage, current, instantaneous power, etc. of the substation meter; switch quantity information, such as circuit breaker position status, tripping status, cabinet door opening and closing status and other signals; intelligent capacitor, intelligent circuit breaker and other information, the terminal supports DL / T634.5101, DL / T634.5104, DL / T 698.45, MQTT, Q / GDW 1376.1 protocols for uplink, and DL / T 645, DL / T 698.45, Q / GDW 1376.1, Q / GDW 1376.2, Modbus for downlink Protocols (expandable according to customer needs) collect information according to the set terminal reading day or scheduled reading cycle, and report it to the main station; voltage, current and other DC analog quantity collection functions, the current range is 4 ~ 20mA, the voltage range is 0 ~ 5V, the error does not exceed 5%, and it can realize the temperature and humidity information collection of outdoor distribution boxes, distribution rooms and box-type substations, and can cooperate with fans and other equipment for automatic adjustment.

[0052] ②10kV distribution network terminal operation status monitoring: The intelligent fusion terminal can achieve full coverage of 10kV distribution network terminal data collection, including transformer load monitoring, transformer temperature monitoring and early warning, transformer line loss monitoring, low voltage monitoring and alarm at the terminal of the substation, and can actively report alarm events.

[0053] ③ Substation topology identification: The intelligent fusion terminal can realize substation network topology identification by locally aggregating node data information on the distribution transformer side, line side, and user side; realize automatic archive maintenance through table search, and automatically judge whether the smart electric energy meter crosses the substation area and the phase it is in; periodically collect local communication module routing information, report it to the master station or provide it for query by the master station, and realize network management functions at all levels of the collection system.

[0054] ④ Substation line loss analysis: The intelligent fusion terminal has the function of calculating the daily line loss rate of the substation. The terminal should calculate the daily electricity consumption of low-voltage users, calculate the line loss rate based on the daily electricity consumption of the substation total meter, and record the daily line loss rate curve.

[0055] ⑤The structure of the intelligent fusion terminal is as follows Fig.13 As shown, it includes: upper cover a, transparent flip cover b, indicator light c, flip cover open detection button d, debug serial port e, dual 4G module (with GPS) f, local communication module g, RS232 / RS485 switch h, end cover i, flip cover open detection button j, FE network port k, weak current connector m, strong current heavy load connector n, detection guide hole o. The indicator light is defined as follows Fig.14 As shown in the figure, from left to right are the power status indicator, the operation alarm status indicator, the RS485Ⅰ communication status, the RS485Ⅱ communication status, the RS485Ⅲ / RS232Ⅰ communication status indicator, the RS485Ⅳ / RS232Ⅱ communication status indicator, the RS485 / 232 port function switching indicator (SW1, SW2), the Link status of the corresponding FE port (FE1 / L, FE2 / L), the ACT status of the corresponding FE port (FE1 / A, FE2 / A), the active output status, the reactive output status, the connection status between the terminal and the remote master station, and the connection status between the terminal and the physical network platform module of the distribution automation master station; the interface of the strong current heavy load connector is as shown in the figure. Fig.15 As shown, 1-16 are defined as phase A current terminal_P, phase A current terminal_N, phase B current terminal_P, phase B current terminal_N, phase C current terminal_P, phase C current terminal_N, zero-sequence current terminal_P, zero-sequence current terminal_N, reserved (9-12), phase A voltage, phase B voltage, phase C voltage, and voltage common terminal.

[0056] The communication pan-tilt mechanism 4 includes a base 41, a mounting flange 42 is provided below the base 41, a heat sink 43 is provided on the side of the base 41, and a rotating seat 44 with a "U"-shaped structure is movably installed above the base 41, and a pulse-type industrial frequency signal transceiver 45 and a wireless communication transceiver 46 are respectively provided on the rotating seat 44.

[0057] The communication pan-tilt mechanism 4 identifies and receives the pulsed industrial frequency low-power characteristic signal actively generated by the LTU device of the distribution unit through the pulsed industrial frequency signal transceiver 45; the communication pan-tilt mechanism 4 establishes a wireless connection with the cover-type FTU 1 located in the distribution unit through the wireless communication transceiver 46.

[0058] The bottom surface of the base 41 is provided with a turntable 47 rotatably connected to the mounting flange 42, and the inside of the base 41 is provided with a first spur gear 48 connected to the axis of the turntable 47, one side of the first spur gear 48 is connected to the first gear servo motor assembly 49, and the other side is connected to the first gear rotary encoder 401.

[0059] The base 41 is provided with a first side cover 402 and a second side cover 403 on both sides, and the first side cover 402 and the second side cover 403 are connected to the rotating seat 44 through deep groove ball bearings. A second spur gear 404 is provided on the upper side of the base 41, which passes through the second side cover 403 and is connected to the shaft of the rotating seat 44. One side of the second spur gear 404 is connected to the second gear-type servo motor assembly 405 for power, and the other side is connected to the second gear-type rotary encoder 406 for power.

[0060] A group of arc-shaped stop disks 407 are arranged at intervals on the outer circumference of the second side cover 403 , and stoppers 408 are arranged between the stop disks 407 .

[0061] In this embodiment, the working principle of the communication pan-tilt mechanism is as follows: when adjustment is required, the first gear-type servo motor assembly is started, the first gear-type servo motor assembly drives the first spur gear to rotate, the first spur gear drives the turntable, the rotating seat and the pulse-type industrial frequency signal transceiver and the wireless communication transceiver installed on the rotating seat to rotate as a whole, thereby realizing the overall rotation function, which is convenient for adjustment according to actual installation requirements; the second gear-type servo motor assembly is started, the second gear-type servo motor assembly drives the second spur gear to rotate, the second spur gear drives the rotating seat to rotate relative to the first side cover and the second side cover, thereby driving the rotating seat and the pulse-type industrial frequency signal transceiver and the wireless communication transceiver installed on the rotating seat to rotate relative to the first side cover and the second side cover, thereby realizing the change of the pitch angle, which is convenient for angle adjustment according to the actual signal reception requirements; the brake disc and the stopper cooperate with each other to limit the angle adjustment range; the gear-type rotary encoder is used to measure the rotation speed and can achieve rapid speed regulation in conjunction with PWM technology.

[0062] The present invention is a distribution substation equipment status monitoring system. In use, the intelligent fusion terminal 3 of the present invention is connected to the distribution unit through the communication pan-tilt mechanism 4. The communication pan-tilt mechanism 4 can adopt wireless and power frequency signal dual communication modes, and can also adjust the angle and direction according to the actual installation requirements, which greatly improves the practicality. The present invention realizes the refined monitoring of the operation status of the distribution substation through the intelligent fusion terminal 3, timely predicts and repairs the fault, improves the fault response speed, and ensures the power supply quality and reliability of the distribution substation. The present invention determines the fault working condition of the substation equipment through the intelligent fusion terminal, and generates a characteristic state sequence signal for identifying the topological structure of the substation branch line at the same time. The intelligent fusion terminal is used to realize automatic identification of the substation topological structure based on the characteristic state sequence signal, and the fault working condition is combined to realize the accurate positioning of the substation fault, avoiding the delay effect of manual meter reading, with high accuracy and high efficiency. Moreover, the management of the substation equipment information is realized by relying on the ledger management, which can prevent the loss of equipment data, and provide basic data support for equipment inspection and maintenance, quickly analyze and obtain the fault handling plan, and improve the efficiency of fixed-point inspection and maintenance. The present invention has the advantages of identifying the substation topological structure, realizing fault positioning, and quickly restoring power supply.

Claims

1. A distribution substation equipment status monitoring system, comprising a collection unit as a collection node and a plurality of hierarchical distribution units as distribution nodes, characterized in that: An intelligent fusion terminal is installed at the aggregation unit, and the aggregation unit establishes a communication connection with multiple distribution units through a communication pan-tilt mechanism and a pulsed industrial frequency signal. One of the distribution units connected to the aggregation unit is connected to multiple distribution units as a first-level distribution node, one of the distribution units connected to the first-level distribution node is connected to multiple distribution units as a second-level distribution node, and one of the distribution units connected to the second-level distribution node is connected to multiple user meter boxes as a third-level distribution node; multiple distribution units located at the first-level distribution node and the second-level distribution node are connected to a number of cover-type FTUs.

2. A distribution substation equipment status monitoring system as claimed in claim 1, characterized in that: The distribution units are connected via wireless communication and / or optical fiber communication; the cover-type FTU is installed on the overhead line of the distribution network through a protective bracket, and the cover-type FTU is connected to the voltage transformer through a control cable and to the 10KV vacuum circuit breaker through a collection cable.

3. A distribution substation equipment status monitoring system as claimed in claim 2, characterized in that: The cover-type FTU is internally provided with a collection module and a main control module, and the collection module is connected with the main control module.

4. A distribution substation equipment status monitoring system as claimed in claim 3, characterized in that: The protective bracket includes a base plate, and support arms are installed on both side ends of the base plate. The upper ends of the support arms are connected by mounting sleeves. The cover-type FTU is fixed inside the mounting sleeve. A damping rod is arranged on the upper inner side of the base plate. One end of the damping rod is connected to the base plate and the other end is connected to the middle part of the corresponding support arm. A spring is installed on the outer sleeve of the damping rod.

5. A distribution substation equipment status monitoring system as claimed in claim 1, characterized in that: The intelligent fusion terminal establishes a wireless connection with the cover-type FTU located in the distribution unit through a communication pan-tilt mechanism. The LTU device of the distribution unit actively generates a pulsed industrial frequency low-power characteristic signal, and issues a trigger command based on the local wireless network of the substation. The collection unit detects the characteristic signal on the bus, and uses micro-current topology recognition technology to determine the front-and-back logical relationship based on the similarity of the corresponding pulse sequence signal detected by the LTU device of each distribution unit. The front-and-back relationship and parallel relationship of the topological network nodes are determined by the traversal search algorithm, thereby realizing automatic recognition of the electrical physical topology of the "distribution transformer-branch-meter box" in the substation.

6. A distribution substation equipment status monitoring system as claimed in claim 5, characterized in that: The communication pan-tilt mechanism includes a base, a mounting flange is arranged below the base, a heat sink is arranged on the side of the base, a rotating seat with a "U"-shaped structure is movably installed above the base, and a pulse-type industrial frequency signal transceiver and a wireless communication transceiver are respectively arranged on the rotating seat.

7. A distribution substation equipment status monitoring system as claimed in claim 6, characterized in that: The communication pan-tilt mechanism identifies and receives the pulsed industrial frequency low-power characteristic signal actively generated by the LTU device of the distribution unit through a pulsed industrial frequency signal transceiver; the communication pan-tilt mechanism establishes a wireless connection with the cover-type FTU located in the distribution unit through a wireless communication transceiver.

8. A distribution substation equipment status monitoring system as claimed in claim 6, characterized in that: A turntable rotatably connected to the mounting flange is disposed on the bottom surface of the base, a first spur gear connected to the turntable shaft is disposed inside the base, one side of the first spur gear is dynamically connected to a first gear-type servo motor assembly, and the other side of the first spur gear is dynamically connected to a first gear-type rotary encoder.

9. A distribution substation equipment status monitoring system as claimed in claim 8, characterized in that: A first side cover and a second side cover are respectively provided on both sides of the base, and the first side cover and the second side cover are connected to the rotating seat through deep groove ball bearings. A second spur gear that penetrates the second side cover and is connected to the rotating seat shaft is provided on the upper side inside the base, and one side of the second spur gear is poweredly connected to a second gear-type servo motor assembly, and the other side is poweredly connected to a second gear-type rotary encoder.

10. A distribution substation equipment status monitoring system as claimed in claim 9, characterized in that: A group of arc-shaped stop disks are arranged at intervals on the outer circumference of the second side cover, and stoppers are arranged between the stop disks.

Images