阅读说明：本技术 一种具备边缘计算能力的智能站所终端及故障判别方法 (Intelligent station terminal with edge computing capability and fault judgment method ) 是由 张姿姿 马天祥 段昕 姬艳鹏 景皓 贾静然 刘振 于 2019-10-31 设计创作，主要内容包括：本发明公开了一种具备边缘计算能力的智能站所终端及故障判别方法,由中央处理器、电源及管理模块、通信模块、线损模块、采集控制模块、操作控制模块和人机交互模块构成；中央处理器、电源及管理模块、通信模块、线损模块和采集控制模块均采用即插即用的模式,方便扩展。本装置安装在配电网开关站、配电室、环网柜、箱式变电站等处的配电终端,具有多线路采集、控制、故障检测等功能,通过对CPU进行分区技术,提高站所终端的运算能力使其具备边缘计算能力；本装置与主站和相邻终端设备通过通信介质连接,利用横、纵多向通信方式,相邻终端的横向通信数据,快速实现故障定位、故障隔离、非故障区域恢复供电,并配合主站纵向通信方式实现三遥功能。(The invention discloses an intelligent station terminal with edge computing capability and a fault judgment method, which are composed of a central processing unit, a power supply and management module, a communication module, a line loss module, an acquisition control module, an operation control module and a man-machine interaction module; the central processing unit, the power supply and management module, the communication module, the line loss module and the acquisition control module are all in a plug-and-play mode, and convenience in expansion is achieved. The device is arranged at a power distribution terminal of a power distribution network switching station, a power distribution room, a ring main unit, a box-type substation and the like, has the functions of multi-line acquisition, control, fault detection and the like, and improves the operational capability of the terminal of the station by carrying out a partition technology on a CPU (central processing unit) so that the terminal has edge computing capability; the device is connected with a main station and adjacent terminal equipment through communication media, and utilizes transverse and longitudinal multi-directional communication modes and transverse communication data of adjacent terminals to quickly realize fault location, fault isolation and power restoration of a non-fault area, and is matched with a main station longitudinal communication mode to realize three remote functions.)

1. An intelligent station terminal with edge computing capability, comprising: the system comprises a central processing unit, a power supply and management module, a communication module, a line loss module, an acquisition control module, an operation control module and a human-computer interaction module; the central processing unit, the power supply and management module, the communication module, the line loss module and the acquisition control module are all in a plug-and-play mode, and convenience in expansion is achieved.

2. The intelligent station terminal with edge computing capability of claim 1, wherein: the central processing unit adopts a large-scale programmable logic array FPGA, the central processing unit adopts an SMP architecture, the central processing unit is subjected to partition processing, different areas process data of different modules, the communication module is subjected to analysis control by the area of the central processing unit responsible for the progress of the communication module, the power management module is subjected to analysis control by the area of the central processing unit responsible for the progress of the power management module, the line loss module is subjected to analysis calculation by the area of the central processing unit responsible for the progress of the line loss module, and the acquisition module is subjected to analysis calculation by the area of the central processing unit responsible for the progress of the acquisition module.

3. The intelligent station terminal with edge computing capability of claim 1, wherein: the communication module comprises a longitudinal communication module communicated with the master station and a transverse communication module communicated with the adjacent terminal in a peer-to-peer manner; the longitudinal communication module and the transverse communication module both adopt wireless communication modes and are compatible with 5/4/3/2G and GPRS/CDMA communication modes;

the transverse communication adopts a Content Delivery Network (CDN), the CDN deploys a proxy server at the network edge, and a micro data center is formed at the network edge;

when the power distribution network normally operates, the communication part with the main station is responsible for uploading terminal information and issuing a main station command, so that the three-remote function of the terminal is realized; when the power distribution network has a fault, the peer-to-peer communication part of the adjacent terminals is responsible for information transmission between the terminals, so that the fault can be quickly identified and isolated, and the processing result is transmitted to the master station through the communication part of the master station.

4. The intelligent station terminal with edge computing capability of claim 1, wherein: the power supply and management module provides a working power supply and a control power supply for other modules, and controls the use of the voltage and current of the line and the voltage and current of the backup power supply and AC-DC conversion; the line AC working power supply is taken from the secondary side output of the line TV, and the backup power supply adopts a super capacitor for power supply.

5. The intelligent station terminal with edge computing capability of claim 1, wherein: the line loss module integrates measurement, metering and communication, measures voltage and current power and calculates power consumption through the voltage acquisition loop, the current acquisition loop and the microcontroller, and the line loss module electric quantity value of the adjacent terminal is connected to obtain line loss.

6. The intelligent station terminal with edge computing capability of claim 1, wherein: the acquisition control module adopts a high-performance digital signal processor DSP to convert the line voltage and current into tiny voltage and current through a mutual inductor and convert the tiny voltage and current into digital signals through an analog-to-digital conversion device and transmit the digital signals to a central processing unit.

7. The intelligent station terminal with edge computing capability of claim 1, wherein: the operation control loop of the operation control module comprises two parts of switch operation mode conversion and switch local operation.

8. The intelligent station terminal with edge computing capability of claim 7, wherein: the switch operation mode switching part comprises a change-over switch and a corresponding indicator light and is used for selecting three switch operation modes of local, remote and locking;

when the local operation mode is selected, the on-off operation of the switch is carried out through an on-off button on the panel; when the remote operation mode is selected, the switch is switched on and off in a remote control mode; when the locking operation mode is selected, the local and remote areas can not be operated, the operation control module is arranged on the outer side of the lower half part of the station terminal, and the switch operation is connected with the internal terminal wiring.

9. The intelligent station terminal with edge computing capability of claim 1, wherein: the human-computer interaction module comprises a display screen, an operation keyboard and a device operation indicator lamp;

the display screen and the operation keyboard are used for carrying out local configuration and maintenance on the power distribution terminal, and the configuration and maintenance comprises a TV/TA wiring mode, remote measurement/remote signaling/remote control configuration parameters, a fault detection fixed value, a device number and a communication baud rate; the display screen displays the voltage, current and power measurement data; the device operation indicating lamp is used for indicating the operation states of the measurement and control unit, the backup power supply and the communication, the switch position state and the line operation state.

10. A fault discrimination method for a terminal of an application intelligent station is characterized by comprising the following processes: when the distribution network normally operates, the power supply module obtains power to operate, the acquisition control module and the line loss module acquire and report information to the central processing unit, and the central processing unit processes the information in different areas and uploads the information to the main station or receives a command issued by the main station through the communication part of the communication module and the main station; when a fault occurs, the device collects line voltage and current by a collection control module, reports the line voltage and current to a central processing unit, acquires collection information of other terminals through a peer-to-peer communication part of a communication module and an adjacent terminal, reports the collection information to the central processing unit, processes data by the central processing unit, identifies a fault point, issues the fault point information to other terminals, adjusts the state of a switch, isolates the fault point, reports the result to a main station through the communication part of the communication module and the main station, reduces the analysis redundant data of the main station, and shortens the fault isolation time; and if the fault point can not be judged after the station middle end analyzes the data of the adjacent terminals, immediately reporting to the main station.

Technical Field

The invention relates to an intelligent station terminal with edge computing capability and a fault judgment method.

Background

With the rapid improvement of the distribution automation coverage rate, the master station faces the condition of analyzing a large amount of complicated data, and distributed computation and edge computation are urgently needed to remove centralization so as to reduce the data analysis pressure of the master station; with the development of 5g technology, the short timeliness of distributed computation and edge computation can be gradually satisfied; the ring main unit is an important part of urban power distribution network development, a station terminal of the monitoring and control ring main unit can be installed and put into operation in a large area, an intelligent station terminal with edge computing capability and a fault judgment method can quickly identify and isolate faults by using a 5g technology and an adjacent terminal communication intercommunication technology, and data processing results are uploaded to a main station, so that the fault solution efficiency is improved, and the workload of the main station is shared.

At present, domestic production and use are all traditional station terminals, and the terminal does not have edge computing capability and adjacent terminal communication capability. When a fault occurs, the station terminal related to the fault point reports the abnormal information to the master station, the master station issues a command to the station terminal after analyzing and calculating, and the station terminal controls the switching-on and switching-off conditions of each circuit of the ring main unit after receiving the command.

Therefore, it is desirable to provide an intelligent station terminal with edge computing capability and a fault determination method that solve the above problems.

Disclosure of Invention

The invention aims to provide an intelligent station terminal with edge computing capability and a fault judgment method, which are suitable for a medium-voltage station area. The method comprises the steps that the computing capability of a station terminal is improved through a CPU partitioning technology of the station terminal, so that the station terminal has edge computing capability; on the basis, the local area communication intercommunication technology is used for communicating information of adjacent terminals at the moment of occurrence of the fault, isolating the fault in time, shortening fault identification and fault isolation time, not only reducing analysis data pressure of a main station, but also being independent of the main station, improving power supply reliability and improving production benefits.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

an intelligent station terminal with edge computing capability and a fault judgment method are composed of a central processing unit, a power supply and management module, a communication module, a line loss module, an acquisition control module, an operation control module and a man-machine interaction module; the central processing unit, the power supply and management module, the communication module, the line loss module and the acquisition control module are all in a plug-and-play mode, and convenience in expansion is achieved.

Furthermore, the central processing unit adopts a large-scale programmable logic array FPGA, the central processing unit adopts an SMP architecture, the central processing unit is subjected to partition processing, different areas process data of different modules, the communication module is subjected to analysis control by the area of the central processing unit responsible for the progress of the communication module, the power management module is subjected to analysis control by the area of the central processing unit responsible for the progress of the power management module, the line loss module is subjected to analysis calculation by the area of the central processing unit responsible for the progress of the line loss module, and the acquisition module is subjected to analysis calculation by the area of the central processing unit responsible for the progress of the acquisition module.

Further, the communication module comprises a longitudinal communication module which is communicated with the main station and a transverse communication module which is communicated with the adjacent terminal in a peer-to-peer manner; the longitudinal communication module and the transverse communication module both adopt wireless communication modes and are compatible with 5/4/3/2G and GPRS/CDMA communication modes;

the transverse communication adopts a Content Delivery Network (CDN), the CDN deploys a proxy server at the network edge, and a micro data center is formed at the network edge;

when the power distribution network normally operates, the communication part with the main station is responsible for uploading terminal information and issuing a main station command, so that the three-remote function of the terminal is realized; when the power distribution network has a fault, the peer-to-peer communication part of the adjacent terminals is responsible for information transmission between the terminals, so that the fault can be quickly identified and isolated, and the processing result is transmitted to the master station through the communication part of the master station.

Furthermore, the power supply and management module provides a working power supply and a control power supply for other modules, and controls the use of the line voltage current and the backup power supply voltage current and AC-DC conversion; the line AC working power supply is taken from the secondary side output of the line TV, and the backup power supply adopts a super capacitor for power supply.

Furthermore, the line loss module integrates measurement, metering and communication, measures voltage and current power and calculates power consumption through the voltage acquisition loop, the current acquisition loop and the microcontroller, and the line loss module electric quantity value of the adjacent terminal is connected to obtain line loss.

Furthermore, the acquisition control module adopts a high-performance digital signal processor DSP to convert the line voltage and current into tiny voltage and current through a mutual inductor and convert the tiny voltage and current into digital signals through an analog-to-digital conversion device and transmit the digital signals to the central processing unit.

Furthermore, the operation control loop of the operation control module comprises a switch operation mode conversion part and a switch local operation part;

furthermore, the switch operation mode switching part comprises a change-over switch and a corresponding indicator light, and is used for selecting three switch operation modes of local, remote and locking;

when the local operation mode is selected, the on-off operation of the switch is carried out through an on-off button on the panel; when the remote operation mode is selected, the switch is switched on and off in a remote control mode; when the locking operation mode is selected, the local and remote areas can not be operated, the operation control module is arranged on the outer side of the lower half part of the station terminal, and the switch operation is connected with the internal terminal wiring.

Further, the man-machine interaction module comprises a display screen, an operation keyboard and a device operation indicator light;

the display screen and the operation keyboard are used for carrying out local configuration and maintenance on the power distribution terminal, and the configuration and maintenance data of the operation keyboard comprise a TV/TA wiring mode, remote measurement/remote signaling/remote control configuration parameters, a fault detection fixed value, a device number and a communication baud rate; the display screen displays the voltage, current and power measurement data; the device operation indicating lamp is used for indicating the operation states of the measurement and control unit, the backup power supply and the communication, the switch position state and the line operation state.

A fault discrimination method for a terminal of an application intelligent station comprises the following processes: when the distribution network normally operates, the power supply module obtains power to operate, the acquisition control module and the line loss module acquire and report information to the central processing unit, and the central processing unit processes the information in different areas and uploads the information to the main station or receives a command issued by the main station through the communication part of the communication module and the main station; when a fault occurs, the device collects line voltage and current by a collection control module, reports the line voltage and current to a central processing unit, acquires collection information of other terminals through a peer-to-peer communication part of a communication module and an adjacent terminal, reports the collection information to the central processing unit, processes data by the central processing unit, identifies a fault point, issues the fault point information to other terminals, adjusts the state of a switch, isolates the fault point, reports the result to a main station through the communication part of the communication module and the main station, reduces the analysis redundant data of the main station, and shortens the fault isolation time; and if the fault point can not be judged after the station middle end analyzes the data of the adjacent terminals, immediately reporting to the main station.

Compared with the prior art, the invention has the following beneficial effects:

the invention relates to a three-remote intelligent station terminal with edge computing capability, which is suitable for a medium-voltage transformer area. The device is connected with a main station and adjacent terminal equipment through communication media, and utilizes transverse and longitudinal multi-directional communication modes and transverse communication data of adjacent terminals to quickly realize fault location, fault isolation and power restoration of a non-fault area, and is matched with a main station longitudinal communication mode to realize three remote functions. The hardware and the software of the device are developed in a modularized mode, so that the function expansion of the device is facilitated, and the equipment cost is reduced.

Drawings

FIG. 1 is a schematic diagram of a CPU partition according to the present invention;

FIG. 2 is a communication schematic of the communication module of the present invention;

FIG. 3 is a flow chart of the fault determination of the present invention;

FIG. 4 is a schematic diagram of a fault occurrence point of the fault occurrence processing of the present invention;

FIG. 5 is a schematic diagram of fault isolation for the fault occurrence process of the present invention;

FIG. 6 is a schematic illustration of the non-failing zone recovery of the failure occurrence handling process of the present invention;

FIG. 7 is a schematic diagram of a terminal hardware structure of the intelligent station of the present invention;

fig. 8 is an external schematic view of a terminal of the intelligent station of the present invention.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the case of not making a reverse description, these directional terms do not indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the scope of the present application; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of protection of the present application is not to be construed as being limited.

As shown in fig. 1, 2, 7 and 8, an intelligent station terminal with edge computing capability is composed of a central processing unit, a power supply and management module, a communication module, a line loss module, an acquisition control module, an operation control module and a human-computer interaction module; the central processing unit, the power supply and management module, the communication module, the line loss module and the acquisition control module are all in a plug-and-play mode, and convenience in expansion is achieved.

Furthermore, the central processing unit of the device adopts a large-scale programmable logic array (FPGA), so that the operation efficiency is improved. The central processing unit of the device adopts an SMP (symmetric multi-processing) framework, the central processing unit is subjected to partition processing, different areas process data of different modules, the communication module is subjected to analysis and control by the area of the central processing unit responsible for the progress of the communication module, the power management module is subjected to analysis and control by the area of the central processing unit responsible for the progress of the power management module, the line loss module is subjected to analysis and calculation by the area of the central processing unit responsible for the progress of the line loss module, the acquisition module is subjected to analysis and calculation by the area of the central processing unit responsible for the progress of the acquisition module, the operation speeds of the areas are not influenced by each other.

Further, the communication modules are divided into a vertical communication module for communicating with the main station and a horizontal communication module for peer-to-peer communication with the adjacent terminals. The wireless communication mode is adopted, and the system is compatible with the mainstream communication mode (5/4/3/2G, GPRS/CDMA and the like) in the market. The method comprises the steps that a Content Delivery Network (CDN) is adopted for transverse communication, a proxy server is deployed at the edge of the CDN, a miniature data center is formed at the edge of the CDN, and by means of a high-speed communication technology, network delay is reduced, the network utilization rate is improved, and an efficient and stable data transmission effect is achieved. When the power distribution network is in fault, the peer-to-peer communication part of the adjacent terminals is responsible for information transmission between the terminals, so that the fault is quickly identified and isolated, and a processing result is transmitted to the master station through the master station communication part.

Furthermore, the electric power supply and management module provides a working power supply and a control power supply for other modules, and controls the use of line voltage and current and the use of backup power supply voltage and current and AC-DC conversion. The AC working power supply of the device is usually taken from the secondary side output of the line TV, and the backup power supply adopts a super capacitor for power supply.

Furthermore, the line loss module integrates measurement, metering and communication, measures voltage and current power and calculates power consumption through a voltage acquisition loop, a current acquisition loop, a microcontroller and the like, and the line loss module electric quantity value of the adjacent terminal is connected to obtain line loss.

Furthermore, the acquisition control module consists of an analog quantity plugboard, a switching quantity plugboard and a control quantity plugboard, and the quantity can be configured according to actual needs so as to meet different actual requirements. The acquisition control module adopts a high-performance Digital Signal Processor (DSP) to convert the line voltage and current into tiny voltage and current through a mutual inductor and convert the tiny voltage and current into digital signals through an analog-to-digital conversion device and transmit the digital signals to a central processing unit.

Furthermore, the operation control module and the operation control loop comprise a switch operation mode conversion part and a switch local operation part. The switch operation mode switching part consists of a change-over switch and a corresponding indicator light and is used for selecting three switch operation modes of local, remote and locking. When the local operation mode is selected, the switch on-off operation can be carried out through the switch on-off button on the panel; when the remote operation mode is selected, the switch on/off operation can be carried out in the remote control mode; when the locking operation mode is selected, the locking operation mode cannot be operated in local and remote places. The operation control module is arranged outside the lower half part of the station terminal, and the switch operation is connected with the internal terminal wiring.

Furthermore, the man-machine interaction module comprises a display screen, an operation keyboard and a device operation indicator lamp. The display screen and the operation keyboard are used for carrying out local configuration and maintenance on the power distribution terminal, and the display screen and the operation keyboard are used for displaying measurement data such as voltage, current, power and the like, wherein the measurement data comprises a TV/TA wiring mode, remote measurement/remote signaling/remote control configuration parameters, fault detection fixed values, device numbers, communication baud rates and the like; the device operation indicating lamp is used for indicating the operation states of the measurement and control unit, the backup power supply and the communication, the switch position state and the line operation state, and is convenient to operate and maintain.

The device has flexible and convenient software configuration, can realize various current operation modes through maintenance software configuration, complete multi-loop full-electricity measurement, including basic electrical parameters such as direct current semaphore, alternating current voltage, phase current, zero sequence current, frequency, harmonic data and the like, and simultaneously calculate active power, reactive power and power factor data.

The device has a fault current detection function, and the fault detection takes a return line as a unit, so that the functions of three-section overcurrent protection, overload alarm, zero sequence current protection, inrush current locking, four-time reclosing, PT (potential transformer) disconnection/voltage loss alarm, overvoltage alarm, power supply backup switching and the like are realized. Corresponding functions can be added and expanded according to actual needs.

The device adopts a bidirectional optimization model combined with a deep learning algorithm and a transverse and longitudinal optimization model combined with a particle swarm algorithm, when a fault occurs, the fault is quickly positioned and isolated, meanwhile, an optimal load transfer path is provided, and the quick recovery of power supply in a non-fault area is ensured.

The device has the capability of circularly storing historical data, the stored data is not lost after the power supply is powered off, and the device has a complete self-recovery circuit design, ensures the normal work of equipment and prevents the halt. The device has the capability of circularly storing historical data, and the stored data is not lost after the power supply is powered off. The communication module monitoring device has a communication interface monitoring function and can monitor the state, IP address and the like of the communication module.

As shown in fig. 3, a method for determining a fault of a terminal of an intelligent station includes the following steps: when the distribution network normally operates, the power supply module obtains power to operate, the acquisition control module and the line loss module acquire and report information to the central processing unit, and the central processing unit processes the information in different areas and uploads the information to the main station or receives a command issued by the main station through the communication part of the communication module and the main station; when a fault occurs, the device collects line voltage and current by a collection control module, reports the line voltage and current to a central processing unit, acquires collection information of other terminals through a peer-to-peer communication part of a communication module and an adjacent terminal, reports the collection information to the central processing unit, processes data by the central processing unit, identifies a fault point, issues the fault point information to other terminals, adjusts the state of a switch, isolates the fault point, reports the result to a main station through the communication part of the communication module and the main station, reduces the analysis redundant data of the main station, and shortens the fault isolation time; and if the fault point can not be judged after the station middle end analyzes the data of the adjacent terminals, immediately reporting to the main station.

Taking the circuit diagrams and short-circuit faults of fig. 4-6 as examples, the processing flow of the device in the fault occurrence is shown in the figures, wherein CB1 and CB2 are outlet breakers, FS1-FS7 are ring main units and overhead line breakers, and LSW1 is an interconnection switch. The fault occurs at the arrow, the intelligent station terminal matched with the ring main unit 1 communicates with the station terminal matched with the ring main units 2 and 3, the fault point is judged to be between the three ring main units, the FS2, the FS3 and the FS5 trip out, and the fault point is successfully isolated. And the FS6 is tripped in case of power failure, the single-side power failure interconnection switch LSW1 is switched on, the FS6 is switched on in case of power failure, and the power supply is recovered in a non-fault area.

The foregoing examples, while indicating preferred embodiments of the invention, are given by way of illustration and description, but are not intended to limit the invention solely thereto; it is specifically noted that those skilled in the art or others will be able to make local modifications within the system and to make modifications, changes, etc. between subsystems without departing from the structure of the present invention, and all such modifications, changes, etc. fall within the scope of the present invention.