Internet-of-things feeder terminal equipment

Abstract

The utility model relates to the technical field of intelligent power distribution, and especially relates to an Internet of Things feeder terminal device. The Internet of Things feeder terminal equipment adopts a dual-system core board, adopts a dual-core heterogeneous core scheme of a real-time core and a non-real-time core according to the real-time and non-real-time requirements of medium-voltage distribution network service data processing, supports multi-service identification processing, and is widely applied to Internet of Things transformation and upgrading of various medium-voltage distribution equipment. Through a built-in 5G communication module, point-to-point communication between devices is realized, millisecond-level data transmission is supported, low delay and reliability of data transmission are ensured, and a scheme of in-situ rapid fault isolation such as differential protection is realized. The device also supports an MQTT Internet of Things protocol, can realize edge calculation, has the characteristics of hardware platformization, software APP, software development interface standardization, edge calculation and the like, and can be accessed to sensing layer equipment of various communication types. And the device supports plug and play, has a self-description capability, and realizes software and hardware decoupling.

Description

Technical Field

[0001] The utility model relates to the technical field of intelligent power distribution, and in particular to an Internet of Things feeder terminal device. Background Art

[0002] Feeder terminal equipment can monitor the operating status of switches online, provide technical support for the safe operation of primary equipment, and provide basic data for various management functions such as line loss analysis, load forecasting, and feeder automation. It plays a positive role in improving the reliability and power supply quality of distribution network operation, reducing labor intensity, shortening power outage time and reducing power outage area. Traditional feeder terminal equipment has the following disadvantages:

[0003] The program cannot be upgraded remotely in batches. Generally, operation and maintenance personnel have to go to the site to upgrade, which is time-consuming and labor-intensive.

[0004] There is no communication between devices, and it is impossible to implement solutions such as differential fault isolation on site;

[0005] It does not support plug-and-play, cannot access perception layer devices, does not support APP, and cannot achieve software and hardware decoupling. Utility Model Content

[0006] In order to solve the problems that existing feeder terminal equipment cannot be upgraded in batches, cannot communicate between devices, cannot achieve differential on-site isolation, and cannot access perception layer equipment, the present application provides an Internet of Things feeder terminal equipment.

[0007] The technical solution adopted by the utility model is as follows:

[0008] An Internet of Things feeder terminal device includes a dual-system core board with a real-time operating system and a non-real-time operating system, and a built-in 5G communication module, wherein:

[0009] The real-time operating system is responsible for processing the real-time application part; the non-real-time operating system is responsible for processing the non-real-time application part;

[0010] The real-time application part and the non-real-time application part exchange data information through the MQTT data bus;

[0011] The real-time application part includes basic acquisition module, conventional protection module, and small current grounding line selection module, which exchange data information through shared memory;

[0012] The non-real-time application part includes a communication module, including southbound communication and northbound communication; southbound communication collects data from the lower sensor; northbound communication communicates with the main station and supports 4G / Ethernet.

[0013] Furthermore, the non-real-time application part also includes a human-computer interaction module, which exchanges data information with the communication module through the MQTT data bus.

[0014] Furthermore, the human-computer interaction module includes a liquid crystal display, buttons, and signal indicator lights.

[0015] Furthermore, the real-time application part also includes a 5G differential module and an intelligent distributed FA module, which exchange data information with other modules of the real-time application part through shared memory.

[0016] Furthermore, northbound communication supports the MQTT IoT access protocol and can access perception layer devices.

[0017] Furthermore, the sensing layer equipment includes fault finger, partial discharge, pressure / micro water / arc light inside the box, leakage current, and video.

[0018] Furthermore, the real-time application part also includes a power quality analysis module, which exchanges data information with other modules of the real-time application part through a shared memory.

[0019] The beneficial effects of the utility model are as follows:

[0020] Traditional feeder terminal equipment programs cannot be upgraded remotely in batches, and maintenance personnel usually have to go to the site to upgrade, which is time-consuming and labor-intensive. The IoT feeder terminal equipment of the present application adds a communication module, supports 4G / Ethernet, and supports batch remote upgrade of programs.

[0021] Traditional feeder terminal equipment cannot communicate with each other, and cannot implement solutions such as differential on-site rapid fault isolation. The IoT feeder terminal equipment of this application adds an intelligent distributed FA module to achieve the exchange of fault information between adjacent IoT feeder terminal equipment and achieve fault isolation and location; adds a 5G differential module to achieve differential protection through high-speed synchronous sampling technology, quickly isolate faults, and complete power supply restoration in non-fault areas.

[0022] Traditional feeder terminal equipment does not support plug-and-play, cannot access perception layer equipment, does not support APP, and cannot achieve hardware and software decoupling. The IoT feeder terminal of this application adds a communication module, supports the MQTT IoT access protocol, realizes plug-and-play of equipment, fully accesses perception layer equipment, APP, and hardware and software decoupling. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a block diagram of data interaction between various modules of IoT feeder terminal equipment. DETAILED DESCRIPTION

[0024] The utility model is further described below in conjunction with the accompanying drawings.

[0025] The utility model adopts a dual-system core board, namely a real-time operating system and a non-real-time operational system. The core board is designed for real-time and non-real-time needs of medium-voltage distribution network business data processing, and adopts a dual-core heterogeneous core solution of real-time core and non-real-time core. It fully supports multi-business identification and processing, and can be widely used in the Internet of Things transformation and upgrading of various medium-voltage distribution equipment. It has functions such as business data channel and remote network management channel, and supports remote batch upgrade.

[0026] The utility model has a built-in 5G communication module, which can realize point-to-point communication between devices, support millisecond-level data transmission, ensure low latency and reliability of data transmission, and realize solutions such as differential protection for rapid on-site fault isolation.

[0027] The utility model supports the MQTT Internet of Things protocol and can realize edge computing. The product has the characteristics of hardware platformization, software APPization, standardized software development interface, edge computing, etc. It can widely access various types of communication sensing layer devices, such as pointer, partial discharge, pressure / micro-water / arc light in the box, leakage current, video, etc., to achieve full perception of the power grid. The utility model supports plug-and-play, and can directly replace old equipment without complex operations such as point-to-point communication with the main station. The device has self-description capabilities and achieves software and hardware decoupling.

[0028] The main functional modules of the IoT feeder terminal equipment are divided into real-time application part and non-real-time application part. The real-time application part includes basic acquisition module, conventional protection module, power quality analysis module, 5G differential module, intelligent distributed FA, small current grounding line selection module, etc. The modules of the real-time application part exchange data information through shared memory, and the non-real-time application part includes communication module and human-computer interaction module. The modules of the non-real-time application part exchange data information through the MQTT data bus. Real-time application and non-real-time application also exchange data information through the MQTT data bus.

[0029] Each module extracts data from the real-time database and performs logical operations. The calculation results are fed back to other modules through shared memory or data exchange bus and stored in the historical database. The data interaction between modules is as follows: Figure 1 shown.

[0030] The specific contents are as follows:

[0031] The basic acquisition module includes AC analog quantity acquisition, hardware frequency measurement, active power, reactive power, power factor, phase angle and other calculation data. It can realize input quantity acquisition and output quantity control, receive remote control commands issued by the master station, and complete the control of equipment such as circuit breakers or load switches.

[0032] Conventional protection modules include quick-break protection, short-delay protection, long-delay protection, zero-sequence protection, frequency protection, voltage protection, reclosing, post-acceleration, etc. Real-time monitoring of line operation status. When a distribution line fails, the fault can be removed within 60ms to ensure the safe operation of the power grid. Faults can trigger fault recording to record the waveform characteristics of the fault moment, providing a basis for accident analysis.

[0033] The power quality analysis module includes 2-25 harmonic analysis, distortion rate analysis, interharmonic analysis, voltage fluctuation and flicker, voltage deviation, voltage imbalance, voltage qualification rate statistics, etc., providing a basis for power quality monitoring of distribution networks.

[0034] The intelligent distributed FA module mainly isolates and locates faults by exchanging fault information between adjacent FTUs. The time for fault isolation can be less than 1 second, thus reducing power outage time for users.

[0035] The 5G differential module realizes differential protection through high-speed synchronous sampling technology. The fault point can be removed within 100ms, the fault can be quickly isolated on site, and power supply to the non-fault area can be restored.

[0036] The small current grounding line selection module mainly realizes the function of small current grounding fault line selection. This module uses zero-sequence voltage, zero-sequence current, phase current and other signal quantities to integrate grounding detection technologies such as the first half wave, parameter identification method, and zero-sequence power direction method, and selects the advantages of each part at the algorithm level of grounding fault protection. In this way, the dead zone of grounding detection can be complemented, the problem of high-resistance grounding can be solved, the grounding point can be found in time, safety hazards can be eliminated, and the reliability of the distribution network can be improved.

[0037] The communication module includes southbound communication and northbound communication. Southbound communication mainly collects fault indicators, partial discharge, pressure / micro-water / arc light in the box, leakage current, video, etc. to achieve full perception of the power grid. Northbound communication communicates with the main station and supports 4G / Ethernet and MQTT IoT access protocol. Southbound communication realizes data collection and control of the downstream sensors, and provides data support for the autonomy of the distribution area and the realization of on-site real-time control of the distribution network. The northbound communication module realizes edge-end collaboration and cloud-based operation and maintenance to solve massive operation and maintenance work. At the same time, the software APP can be upgraded remotely in batches to improve the practicality and operation and maintenance efficiency of the distribution terminal.

[0038] The human-computer interaction module includes an LCD display, buttons, and signal indicators. The LCD screen displays the measured value, protection value, harmonic quantity, input and output status; the fixed value parameters can be viewed and set; and events can be viewed. The signal indicator can display the real-time status of the IoT feeder terminal equipment, which is convenient for users to conduct inspections.

[0039] Although the utility model has been disclosed as above with preferred embodiments, the embodiments are not intended to limit the present invention. Any equivalent changes or modifications made without departing from the spirit and scope of the present invention also belong to the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the content defined by the claims of this application.

Claims

1. An Internet of Things feeder terminal device, characterized in that: It includes a dual-system core board with both real-time operating system and non-real-time operating system, and a built-in 5G communication module. The real-time operating system is responsible for processing the real-time application part; the non-real-time operating system is responsible for processing the non-real-time application part; The real-time application part and the non-real-time application part exchange data information through the MQTT data bus; The real-time application part includes basic acquisition module, conventional protection module, and small current grounding line selection module, which exchange data information through shared memory; The non-real-time application part includes a communication module, including southbound communication and northbound communication; southbound communication collects data from the lower sensor; northbound communication communicates with the main station and supports 4G / Ethernet.

2. The IoT feeder terminal device according to claim 1, characterized in that: The non-real-time application part also includes a human-computer interaction module, which exchanges data information with the communication module through the MQTT data bus.

3. The IoT feeder terminal device according to claim 2, characterized in that: The human-computer interaction module includes a liquid crystal display, buttons, and signal indicator lights.

4. The IoT feeder terminal device according to claim 1, characterized in that: The real-time application part also includes a 5G differential module and an intelligent distributed FA module, which exchange data information with other modules of the real-time application part through shared memory.

5. The IoT feeder terminal device according to claim 1, characterized in that: Northbound communication supports the MQTT IoT access protocol and can access perception layer devices.

6. The IoT feeder terminal device according to claim 5, characterized in that: The sensing layer equipment includes fault finger, partial discharge, pressure / micro water / arc light inside the box, leakage current, and video.

7. The IoT feeder terminal device according to claim 1, characterized in that: The real-time application part also includes a power quality analysis module, which exchanges data information with other modules of the real-time application part through shared memory.

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