Power distribution protection measurement and control device

Abstract

The utility model provides a power distribution protection measurement and control device, and belongs to the field of power distribution protection measurement and control. Comprising a device main body, a data acquisition module, a signal conditioning circuit, a communication module and a power supply module, the device body comprises a main shell and a cover plate, the cover plate is installed on the surface of the main shell, accurate analysis is carried out in combination with a system of a power distribution protection measurement and control device, and the fault recognition accuracy under complex working conditions is greatly improved; by means of the Internet of Things technology, computing power distribution is optimized, the data processing and analysis speed is increased, the communication module integrates an RJ45 hardware interface, two Ethernet communication ports and a 4G / 5G wireless communication module, a diversified communication interface structure is formed in cooperation with a multi-protocol conversion chip, the communication module can adapt to remote areas and complex wiring scenes without additional wiring, and the data processing and analysis speed is improved. And the standard interface design ensures stable data transmission.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of distribution protection measurement and control, specifically to a distribution protection measurement and control device. BACKGROUND

[0002] In the power distribution system, the distribution protection measurement and control device is the key equipment to ensure the safe operation of the power grid, but the existing similar devices have many technical defects in the structural design, which seriously affect their operation stability, maintenance convenience and application range.

[0003] The core function modules of the existing device are mostly installed in the shell by bolt fixation or welding, which not only makes the assembly process cumbersome, but also requires disassembly of the overall structure during subsequent maintenance and module replacement, resulting in extremely low maintenance efficiency. Moreover, some devices do not have a unified module assembly reference, the connection stability between the core module and the expansion module is poor, and contact failure is easily caused by vibration; at the same time, most device shells are made of ordinary plastic or thick steel plate, which has low heat dissipation efficiency, the internal module layout is dense without a reasonable heat dissipation channel, long-term high temperature easily causes electronic component aging failure, and the sealing structure design of the shell and the cover plate is simple, with poor dust and moisture resistance, which easily affects the service life of the equipment due to water vapor and dust invasion when used in outdoor or humid environments.

[0004] In addition, the human-computer interaction and interface layout of the existing device also have obvious defects, the display screen, control buttons, warning lights and other human-computer interaction components are arranged in disorder, some buttons and display screens are hidden in position, which is not convenient for on-site operators to quickly observe data and operate, at the same time, the existing device usually has single type of communication interface, mostly wired interface, lacks a unified interface assembly structure, cannot realize stable communication in remote areas or wiring difficult scenes, and the connection mode of the interface and the module is simple, data transmission is easily disturbed. In addition, there is a lack of standardized connection and fixing structure between the expansion function module and the core module, mostly using temporary wiring or binding fixation mode, which is inconvenient to install and disassemble, and the connection is loose, signal transmission is unstable, the heat dissipation design of the expansion module is independent of the main shell, and local overheating phenomenon easily occurs; the control module is mostly directly fixed inside the shell, without taking targeted heat dissipation structure design, the heat generated during operation easily accumulates, and the connection end with the core module lacks a buffer fixing structure, which easily causes the welding point to fall off in the equipment transportation or vibration environment. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a distribution protection measurement and control device.

[0006] To achieve the above object, the utility model provides the following technical scheme: a distribution protection measurement and control device, including device main body and built -in module assembly, device main body includes aluminium main casing and apron, apron covers main casing surface, and apron is equipped with screen hole, button hole, through -hole three kinds of installation hole positions of assembling man -machine interactive component, the inside of apron is equipped with control panel, control panel is assembled with and screen hole, button hole, through -hole one -to -one adaptation display screen, control button cluster and warning light cluster,

[0007] Module assembly includes core function module, core function module includes data acquisition module, signal conditioning circuit, communication module and power module, the both sides of main casing inner wall are equipped with strip slot, and the components of core function module are fixed by sliding embedding through strip slot;

[0008] Data acquisition module output end is connected with signal conditioning circuit, signal conditioning circuit output end is connected with communication module, and power module provides power supply support for core function module and control panel.

[0009] As a preferred scheme of the utility model: data acquisition module is equipped with sampling channel, signal conditioning circuit is equipped with conversion interface, communication module is equipped with interface end and two way ethernet communication port, and power module is equipped with wiring terminal.

[0010] As a preferred scheme of the utility model: module assembly still includes extension function module, and extension function module includes data management module, power quality monitoring module, line loss analysis module and control module;

[0011] Data management module is fixed in main casing through screw, and is connected with control panel electrically;

[0012] Power quality monitoring module is assembled through strip slot sliding, and is welded with data acquisition module signal output end;

[0013] Line loss analysis module is the special module of integrated hardware circuit, is fixed in main casing through screw, and the surface is equipped with the welding interface matched with data acquisition module power acquisition end;

[0014] Control module is hardware structure module, control module is pasted in main casing inner wall through heat -conducting silica gel, and control module is welded with the output end of data acquisition module and signal conditioning circuit.

[0015] As a preferred scheme of the utility model: the integrated hardware circuit of line loss analysis module is on PCB board, and three same type calculation chips are welded on the circuit, and each chip is connected with line loss analysis module signal end through PCB wiring, realizes different dimension line loss calculation respectively, and specifically includes:

[0016] Pre-store power station area identification data, calculate the partition calculation chip of line loss rate according to the dimension of power distribution station area;

[0017] Pre-store typical voltage grade parameters, calculate the sub-pressure calculation chip of line loss according to the dimension of voltage grade;

[0018] Pre-store single power distribution line identification data, calculate line loss according to single line dimension, and connect with data storage chip, sub-line calculation chip for storing line loss trend curve data.

[0019] As a preferred scheme of the utility model, the PCB of the control module is welded with signal processing, fault judgment and reclosing control related hardware, specifically including:

[0020] Fourier transform chip, the Fourier transform chip signal input pin is welded with the three-phase electric parameter signal output end of the data acquisition module, and the signal output pin is connected with the control module signal input end;

[0021] Fault judgment chip, the function pin group of the fault judgment chip is welded with the current threshold comparison circuit, the phase difference detection circuit and the time sequence logic circuit respectively;

[0022] Reclosing control assembly, the reclosing control assembly includes a reclosing control relay and a latching circuit, the relay is connected in series in the control loop of the control module, and is connected in parallel with the latching circuit.

[0023] As a preferred scheme of the utility model, the PCB of the communication module is welded with multi-protocol communication, main station docking and edge computing related hardware, specifically including:

[0024] Multi-protocol conversion chip supporting IEC104, IEC101 standard communication protocol;

[0025] Adopt RJ45 hardware interface, and be welded with the communication pin of the multi-protocol conversion chip, for docking the main station docking interface of the distribution network main station platform;

[0026] Support 4G / 5G wireless communication, and the wireless communication module with signal pin welded with the signal end of the communication module;

[0027] Signal input pin is welded with fault feature extraction circuit, and signal output pin is welded with data compression circuit, and edge computing chip.

[0028] Compared with the prior art, the power distribution protection measurement and control device provided by the utility model has the following beneficial effects:

[0029] 1) The utility model discloses a strip slot is provided on the both sides of the inner wall of main casing, makes the core function module and electric energy quality monitoring module can be fixed through sliding embedding mode, replaces traditional bolt fixation or welding structure, and the assembly process does not need complex tool, and when the subsequent overhaul, the module can be extracted along the slot only, can greatly promote maintenance efficiency, and strip slot provides uniform assembly datum for module, ensures the stable connection between module and casing, module and module, avoids the poor contact caused by vibration, the main body of device adopts aluminum main casing, and the heat conduction coefficient of aluminum material is high, and the internal heat dissipation channel formed by cooperation module dispersed assembly can export the heat generated by module operation quickly, effectively reduces the risk of electronic component aging failure, and the control module is pasted in the inner wall of main casing through heat-conducting silica gel, further strengthens heat conduction, ensures the long-term stable operation of control module, and the cover plate and the cover structure of main casing cooperate with the embedded installation of man-machine interaction component, also improve the dustproof, moisture-proof performance of device, adapt to outdoor and humid environment use;

[0030] 2) The utility model discloses the reasonable layout of the cover plate upper screen hole, button hole, through -hole, makes display screen, control button cluster and warning light cluster one -to -one corresponding assembly, and display screen is located at the upper portion of cover plate, control button cluster is located at the bottom, and warning light cluster is centrally arranged, is convenient for on -the -spot operator to observe equipment state and carry out operation quickly, in addition, communication module integrates RJ45 hardware interface, two way ethernet communication port and 4G / 5G wireless communication module, cooperates multi -protocol conversion chip, forms diversified communication interface structure, can adapt to remote area and complex wiring scene without additional wiring, and the standard interface design ensures that data transmission is stable and reliable, in addition, data management module and line loss analysis module are fixed in main casing through screw, control module is pasted through heat-conducting silica gel, and the welding or standard interface connection between extension module and core module is adopted, replaces traditional temporary wiring mode, and the connection stability improves greatly, and each extension module is relied on the heat dissipation structure of main casing and realizes heat dissipation, avoids local overheating, and the reservation design of strip slot can also increase or replace extension module according to actual demand, and the extension flexibility is strong;The aluminum main casing not only has excellent heat dissipation, but also has certain impact resistance, can effectively protect the internal module from external damage, and the parallel structure of reclosing control relay and latching circuit cooperates with the stable installation of control module, ensures that the protection action under the fault state is accurately executed, reduces the risk of power grid operation, and the embedded assembly of man-machine interaction component avoids false touch operation, and improves the safety of equipment use. ACCURACY

[0031] The accompanying drawings are included to provide a further understanding of the present application and are incorporated in and constitute a part of this specification, illustrate embodiments of the present application and serve to explain the present application, and do not constitute a limitation on the present application. In the drawings:

[0032] Figure 1 It is the main body structure diagram of the utility model device.

[0033] Figure 2 It is the installation structure diagram of the cover plate and the control panel of the utility model;

[0034] Figure 3 It is the internal structure diagram of the main shell of the utility model;

[0035] Figure 4 It is the schematic diagram of module connection of the utility model;

[0036] Figure 5 It is the operation block diagram of the power distribution protection measurement and control device of the utility model;

[0037] Figure 6 It is the system block diagram of the power distribution protection measurement and control device of the utility model.

[0038] In the figure: 1, device main body;101, main shell;102, cover plate;103, screen hole;104, button hole;105, through hole;106, control panel;107, display screen;108, warning light cluster;109, control button cluster;2, data acquisition module;21, sampling channel;3, signal conditioning circuit;31, conversion interface;4, communication module;41, interface end;42, Ethernet communication port;43, multi-protocol conversion chip;44, main station docking interface;45, edge computing chip;5, power module;51, wiring terminal;6, strip slot;7, data management module;71, cloud communication interface;72, operation and maintenance data storage chip;721, fault diagnosis chip;722, timing trigger circuit;731, data display driver chip;732, USB interface;8, power quality monitoring module;811, voltage deviation detection circuit;812, frequency deviation detection circuit;813, harmonic detection chip;821, compliance rate calculation chip;822, RS232 interface;831, threshold value adjusting potentiometer;832, audible and visual alarm;9, line loss analysis module;91, metering communication interface;921, abnormal data rejection chip;93, subtraction operation circuit;941, partition calculation chip;942, voltage division calculation chip;943, line division calculation chip;944, data storage chip;10, control module;1011, lightweight Linux processor;1012, priority control circuit;1013, protection algorithm chip;1014, intelligent diagnosis chip;1041, Fourier transform chip;1042, fault judgment chip;1043, current threshold comparison circuit;1044, phase difference detection circuit;1045, time sequence logic circuit;1051, reclosing control relay;1052, latching circuit. DETAILED DESCRIPTION

[0039] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0040] Please refer to Figures 1-6 The utility model provides the following technical scheme: a distribution protection measurement and control device, include: device main body 1 and built -in module assembly, device main body 1 includes main casing 101 and cover plate 102, cover plate 102 installs on the surface of main casing 101, the surface top of cover plate 102 is equipped with screen hole 103, the surface bottom of cover plate 102 is equipped with a plurality of button hole 104, the surface of cover plate 102 is arranged and equipped with a plurality of through -hole 105 in the middle of screen hole 103 and button hole 104, the inside of cover plate 102 is equipped with control panel 106, the surface of control panel 106 is installed with display screen 107, the bottom of display screen 107 is installed with warning light cluster 108, the bottom of warning light cluster 108 is equipped with control button cluster 109, display screen 107 is embedded in the inside of screen hole 103, warning light cluster 108 is correspondingly inserted in the arranged through -hole 105, control button cluster 109 is installed in the inside of button hole 104;

[0041] The module assembly includes a core function module, the core function module includes a data acquisition module 2, and the data acquisition module 2 is installed inside the main casing 101.

[0042] A signal conditioning circuit 3 is installed inside the main casing 101.

[0043] A communication module 4 is installed inside the main casing 101.

[0044] A power module 5 is installed inside the main casing 101.

[0045] The signal output end of the data acquisition module 2 is electrically connected with the signal input end of the signal conditioning circuit 3, the signal output end of the signal conditioning circuit 3 is electrically connected with the signal input end of the communication module 4, and the power module 5 is electrically connected with the data acquisition module 2, the signal conditioning circuit 3 and the communication module 4 respectively and provides power support.

[0046] Specifically: the device body 1 is composed of a main shell 101 and a cover plate 102, and a control panel 106 is mounted on the inner side of the cover plate 102, and a display screen 107, a warning light cluster 108 and a control button cluster 109 are respectively arranged on the control panel 106, the display screen 107, the warning light cluster 108 and the control button cluster 109 are respectively arranged in the screen hole 103, the through hole 105 and the button hole 104 opened on the surface of the cover plate 102, and the power distribution protection monitoring device is applied to the terminal of the power distribution equipment. The device is arranged reasonably, so that the display screen 107 and the control button cluster 109 are convenient for operation and observation, the warning light cluster 108 is used for real-time display of monitoring operation state and fault indication, and the power distribution state can be presented in real time. Through the built-in data acquisition module 2, signal conditioning circuit 3, communication module 4 and power module 5, operation support is provided for power distribution protection monitoring.

[0047] In the embodiment, the surface of the data acquisition module 2 is provided with a sampling channel 21 for current and voltage acquisition, the surface of the signal conditioning circuit 3 is provided with a conversion interface 31, the surface of the communication module 4 is provided with an interface end 41 for multi-protocol conversion, and two-way Ethernet communication ports 42 are arranged on one side of the interface end 41. The surface of the power module 5 is provided with a wiring terminal 51.

[0048] Specifically, the surface of the data acquisition module 2 is provided with a sampling channel 21 for current and voltage acquisition, which is convenient for information acquisition of the monitoring circuit, the surface of the signal conditioning circuit 3 is provided with a conversion interface 31, which is convenient for information transmission conversion, the surface of the communication module 4 is provided with an interface end 41 for multi-protocol conversion, which is adapted to multiple port connections, and two-way Ethernet communication ports 42 are arranged on one side of the interface end 41 for network access and output, ensuring safe network operation. The surface of the power module 5 is provided with a wiring terminal 51, which is convenient for access to the acquisition circuit.

[0049] In the embodiment, a plurality of strip-shaped slots 6 are formed on the inner walls of the main shell 101, and the data acquisition module 2, the signal conditioning circuit 3, the communication module 4 and the power module 5 are slidably inserted into the strip-shaped slots 6. The main shell 101 is made of aluminum.

[0050] Specifically, the data acquisition module 2, the signal conditioning circuit 3, the communication module 4 and the power module 5 are slidably installed in the strip-shaped slots 6, so as to be connected with the main shell 101. The main shell 101 is made of aluminum, which is convenient for rapid heat dissipation.

[0051] In the embodiment, the data management module 7 is further included, and the data management module 7 is fixed in the main shell 101 by screws and electrically connected with the control panel 106 through wires.

[0052] The data management module 7 comprises:

[0053] The cloud communication interface 71 with RJ45 interface is welded with the signal output end of the data acquisition module 2, and the cloud communication interface 71 is also connected to the cloud network and synchronizes the device temperature, vibration and insulation resistance data.

[0054] The operation and maintenance data storage chip 72 is welded on the PCB board, and the operation and maintenance data storage chip 72 is connected with the fault diagnosis chip 721 of model STM32F103 in parallel, and the operation and maintenance data storage chip 72 is also connected with the timing trigger circuit 722 for pre-storing device operation and maintenance period data and generating operation and maintenance task information.

[0055] The data display driving chip 731 of model SSD1306 is used for driving the display screen 107 to display the data instrument panel and the trend curve, the pins of the data display driving chip 731 are welded with the display screen 107, and the data display driving chip 731 is also electrically connected with the PCB board of the data management module 7.

[0056] The USB interface 732 welded on the edge of the PCB board of the data management module 7 is used for connecting the external storage device to upload the detection report.

[0057] Specifically, the data management module 7 is installed in the main shell 101, the device temperature, vibration, insulation resistance and other data of the system are collected through the cloud communication interface 71, the collected data is archived through the operation and maintenance data storage chip 72, when a fault occurs, the data is analyzed through the fault diagnosis chip 721 welded in parallel with the operation and maintenance data storage chip 72 on the PCB board, at the same time, the operation and maintenance data storage chip 72 is connected with the timing trigger circuit 722 for pre-storing device operation and maintenance period data and generating operation and maintenance task information to realize recording, the pins of the display screen 107 are connected with the data display driving chip 731, the data display driving chip 731 is electrically connected with the PCB board of the management module, the device operation data and faults are displayed through the display screen 107 through the data display driving chip 731, which is convenient for checking the faults and conditions, the USB interface 732 is welded on the edge of the PCB board of the data management module 7, which is used for connecting the external storage device to upload the detection report.

[0058] Further comprising an electric energy quality monitoring module 8, the electric energy quality monitoring module 8 is slidably installed in the main shell 101 through the strip slot 6, and is welded with the signal output end of the data acquisition module 2 through wires;

[0059] The electric energy quality monitoring module 8 comprises:

[0060] A voltage deviation detection circuit 811 for collecting the voltage deviation in the range of ±10% rated voltage, the voltage deviation detection circuit 811 is composed of a voltage dividing resistor and an operational amplifier of model LM324;

[0061] A frequency deviation detection circuit 812 for collecting the frequency deviation in the range of 49.5-50.5Hz, which is composed of a crystal oscillator with the model number of 24MHz and a frequency counter chip with the model number of 74HC4060;

[0062] A harmonic detection chip 813 with the model number of ADE7758 for collecting the 2-50th harmonic content, which is welded on the PCB board and used for calculating the power quality compliance rate, and a compliance rate calculation chip 821 with the model number of ATmega16, the harmonic detection chip 813 being welded with the signal collection end of the power quality monitoring module 8;

[0063] An RS232 interface 822 welded on the edge of the PCB board and used for exporting standardized reports;

[0064] A sliding rheostat with the model number of 10kΩ, which is connected in series in the detection circuit and used for presetting the alarm threshold adjustment potentiometer 831;

[0065] An acousto-optic alarm 832 with the model number of LTE1101, which is welded with the power supply end of the warning light cluster 108 and is also connected with the threshold detection circuit and used for triggering the acousto-optic alarm when the data is over the threshold value.

[0066] Specifically, the power quality monitoring module 8 is installed in the main shell 101 and is welded with the signal output end of the data acquisition module 2 through wires, and is used for real-time monitoring and analysis of the voltage, current, frequency and other core parameters of the power distribution system, helping users to master the power quality level and promptly troubleshoot problems, supporting voltage deviation monitoring range ±10% rated voltage through the voltage deviation detection circuit 811 composed of a voltage dividing resistor and an operational amplifier with the model number of LM324, collecting the frequency deviation in the range of 49.5-50.5Hz through the frequency deviation detection circuit 812, collecting the harmonic content 2-50th harmonic, voltage surge / dip and other parameters in real time through the harmonic detection chip 813, exporting standardized reports through the RS232 interface 822 welded on the edge of the PCB board, presetting the alarm through the threshold adjustment potentiometer 831, and alarming when the threshold value is exceeded through the acousto-optic alarm 832 welded with the power supply of the warning light cluster 108.

[0067] In the embodiment, the PCB board of the line loss analysis module 9 is integrated with a hardware circuit, and three calculation chips with the model number of STM32L431 are welded on the circuit, and each chip is connected with the signal end of the line loss analysis module 9 through PCB wiring, and the three calculation chips are respectively:

[0068] A partition calculation chip 941 for pre-storing the power distribution station area identification data and calculating the line loss rate according to the power distribution station area;

[0069] Pre-stored 10kV, 0.4kV voltage level parameters are used to calculate the voltage division calculation chip 942 according to the voltage level respectively.

[0070] Pre-stored single distribution line identification data is used to calculate the line loss of a single line, and the branch calculation chip 943 connected with the data storage chip 944 of model W25Q64 is used to store the line loss trend curve data.

[0071] Specifically, the line loss analysis module 9 is fixed in the main shell 101 by screws, and is welded with the power collection end of the data acquisition module 2. The line loss analysis module 9 is connected to the metering communication interface 91 on the line loss analysis module 9 through RS485 to collect user-side power data from the power meter. The line loss analysis module 9 is connected to the line head power signal and the line end power signal through the subtraction operation circuit 93 composed of the operational amplifier and the resistor, which is used to calculate the actual line loss. Three calculation chips of model STM32L431 are welded on the PCB board of the line loss analysis module 9, which are used to calculate the line loss of each distribution line separately, and the abnormal fluctuation is found through the line loss trend curve.

[0072] The control module 10 is also included, which is pasted on the inner wall of the main shell 101 through heat-conducting silica gel, and is welded with the output end of the data acquisition module 2 and the signal conditioning circuit 3.

[0073] The control module 10 includes:

[0074] The lightweight Linux processor 1011 of model ARMCortex-A7, the pin of which is connected with the priority control circuit 1012, sets the priority of the protection algorithm task to be higher than that of the communication and data storage tasks, and the response time from fault detection to execution is ≤50ms;

[0075] The protection algorithm chip 1013 of model DSPTMS320F28335, which integrates three-section current protection circuit, zero sequence current / voltage detection circuit, thermal accumulation model inverse time protection circuit and harmonic content monitoring circuit.

[0076] The intelligent diagnosis chip 1014 of model STM32H743 is welded on the PCB board, which is used to distinguish short-circuit fault and device aging abnormality.

[0077] The PCB board of the control module 10 is also welded with:

[0078] The three-phase current and voltage signal output end of the data acquisition module 2 is welded with the signal input end of the control module 10, and a Fourier transform chip 1041 of a model AD9850 is used to extract the fundamental wave and harmonic components;

[0079] A fault judgment chip 1042 of a model STM32F407 is used, and the pins of the fault judgment chip 1042 are respectively connected with a current threshold comparison circuit 1043 composed of a comparator LM339, a phase difference detection circuit 1044 composed of a phase detector AD8302 and a time sequence logic circuit 1045 composed of a flip-flop 74HC74;

[0080] A reclosing control relay 1051 of a model HH52P is connected in series in the control loop and is connected in parallel with a blocking circuit 1052 composed of a diode 1N4007.

[0081] Specifically, the control module 10 is pasted on the inner wall of the main shell 101 through heat-conducting silica gel and is welded with the output end of the data acquisition module 2 and the signal conditioning circuit 3, and the heat-conducting silica gel pasting structure strengthens heat dissipation conduction; the protection algorithm chip 1013 integrates three-section current protection, zero sequence current / voltage detection, anti-time limit characteristic protection of a thermal accumulation model, power quality protection and harmonic content monitoring circuit; the intelligent diagnosis chip 1014 realizes fault classification based on a hardware circuit, and distinguishes abnormal types such as short circuit fault and equipment aging; and the parallel structure of the reclosing control relay 1051 and the blocking circuit 1052 ensures accurate and reliable fault protection action.

[0082] The PCB board of the communication module 4 is welded with:

[0083] A multi-protocol conversion chip 43 of a model W5500 supporting IEC104 and IEC101 protocols;

[0084] A master station interfacing interface 44 welded with the communication pin of the multi-protocol conversion chip 43, which is a communication interface adopting an RJ45 hardware interface, and the pin is connected with the multi-protocol conversion chip 43 through PCB wiring and is used for hardware interfacing with the State Grid distribution network master station platform;

[0085] A wireless communication module of a model 4G / 5G, and the signal pin of the wireless communication module is welded with the signal end of the communication module 4;

[0086] An edge computing chip 45 of a model NVIDIA Jetson Nano, the signal input pin of the edge computing chip 45 is welded with the output pin of a fault feature extraction circuit composed of an operational amplifier LM358, the signal output pin of the edge computing chip 45 is welded with the input pin of a data compression circuit composed of a compression chip LZ4, and the edge computing chip 45 realizes data processing through a hardware circuit.

[0087] Specifically, the multi-protocol conversion chip 43, the RJ45 host docking interface 44 and the 4G / 5G wireless communication module welded on the PCB board of the communication module 4 form a diversified communication structure, which is suitable for communication needs in different scenes; the edge computing chip 45 realizes local data preprocessing through a hardware circuit, thereby reducing the load of the host.

[0088] Finally, it should be noted that the above is only the preferred embodiment of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacements to some technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A power distribution protection supervisory control device, characterized by: The device body (1) includes an aluminum main shell (101) and a cover plate (102) covering the surface of the main shell (101), and the cover plate (102) is provided with three types of mounting hole positions for assembling human-computer interaction components, namely a screen hole (103), a button hole (104), and a through hole (105); the inner side of the cover plate (102) is provided with a control panel (106), and the control panel (106) is assembled with a display screen (107), a control button cluster (109), and a warning light cluster (108) which are matched with the screen hole (103), the button hole (104), and the through hole (105) respectively; The module assembly includes a core function module, which includes a data acquisition module (2), a signal conditioning circuit (3), a communication module (4), and a power module (5); the inner wall of the main shell (101) is provided with a strip-shaped slot (6), and each component of the core function module is slidably embedded and fixed through the strip-shaped slot (6); The output end of the data acquisition module (2) is electrically connected with the signal conditioning circuit (3), the output end of the signal conditioning circuit (3) is electrically connected with the communication module (4), and the power module (5) provides power support for the core function module and the control panel (106).

2. The power distribution protection supervisory control device of claim 1, wherein: The data acquisition module (2) is provided with a sampling channel (21), the signal conditioning circuit (3) is provided with a conversion interface (31), the communication module (4) is provided with an interface end (41) and two Ethernet communication ports (42), and the power module (5) is provided with a wiring terminal (51).

3. The power distribution protection supervisory control device of claim 1, wherein: The module assembly further includes an expansion function module, which includes a data management module (7), an electric energy quality monitoring module (8), a line loss analysis module (9), and a control module (10); The data management module (7) is fixed in the main shell (101) by screws and is electrically connected with the control panel (106); The electric energy quality monitoring module (8) is slidably assembled through the strip-shaped slot (6) and is welded with the signal output end of the data acquisition module (2); The line loss analysis module (9) is a special module with integrated hardware circuit, which is fixed in the main shell (101) by screws, and the surface thereof is provided with a welding interface matched with the power acquisition end of the data acquisition module (2); The control module (10) is a hardware structure module, which is pasted to the inner wall of the main shell (101) through heat-conducting silicone, and is welded with the output ends of the data acquisition module (2) and the signal conditioning circuit (3).

4. The power distribution protection supervisory control device of claim 3, wherein: The line loss analysis module (9) has integrated hardware circuit on the PCB board, three same type calculation chips are welded on the circuit, each chip is connected with the signal end of the line loss analysis module (9) through PCB wiring, and different dimension line loss calculations are realized, specifically including: A partition calculation chip (941) for pre-storing power distribution station area identification data and calculating line loss rate according to power distribution station area dimension; A voltage grade calculation chip (942) for pre-storing typical voltage grade parameters and calculating line loss according to voltage grade dimension; Pre-stored single distribution line identification data, line loss is calculated according to single line dimension, and is connected with data storage chip (944), and is used for storing line loss trend curve data of branch calculation chip (943).

5. The power distribution protection supervisory control device of claim 3, wherein: The PCB of the control module (10) is welded with signal processing, fault judgment and reclosing control related hardware, specifically including: Fourier transform chip (1041), the signal input pin of the Fourier transform chip (1041) is welded with the three-phase electric parameter signal output end of the data acquisition module (2), and the signal output pin is connected with the signal input end of the control module (10); Fault judgment chip (1042), the function pin group of the fault judgment chip (1042) is welded with current threshold comparison circuit (1043), phase difference detection circuit (1044) and time sequence logic circuit (1045) respectively; Reclosing control assembly, the reclosing control assembly includes reclosing control relay (1051) and latching circuit (1052), the relay is connected in series in the control loop of the control module (10), and is connected in parallel with the latching circuit.

6. The power distribution protection supervisory control device of claim 1, wherein: The PCB of the communication module (4) is welded with multi-protocol communication, master station docking and edge computing related hardware, specifically including: Multi-protocol conversion chip (43) supporting IEC104 and IEC101 standard communication protocol; Adopt RJ45 hardware interface, and weld with multi-protocol conversion chip (43) communication pin, used for docking master station docking interface (44) of distribution network master station platform; Support 4G / 5G wireless communication, and the wireless communication module with signal pin welded with the signal end of the communication module (4); Signal input pin is welded with fault feature extraction circuit, and signal output pin is welded with edge computing chip (45) of data compression circuit.

Images