CN110784779B - Data acquisition method of electricity consumption information acquisition system - Google Patents

Data acquisition method of electricity consumption information acquisition system Download PDF

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Publication number
CN110784779B
CN110784779B CN201911032909.4A CN201911032909A CN110784779B CN 110784779 B CN110784779 B CN 110784779B CN 201911032909 A CN201911032909 A CN 201911032909A CN 110784779 B CN110784779 B CN 110784779B
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data
energy
acquisition
power consumption
information acquisition
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CN110784779A (en
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王新刚
朱彬若
张垠
赵舫
陈金涛
朱文君
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State Grid Shanghai Electric Power Co Ltd
East China Power Test and Research Institute Co Ltd
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State Grid Shanghai Electric Power Co Ltd
East China Power Test and Research Institute Co Ltd
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q9/00Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00Traffic regulation in packet switching networks
    • H04L47/10Flow control or congestion control
    • H04L47/24Flow control or congestion control depending on the type of traffic, e.g. priority or quality of service [QoS]
    • H04L47/2425Service specification, e.g. SLA
    • H04L47/2433Allocation of priorities to traffic types
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00Network-specific arrangements or communication protocols supporting networked applications
    • H04L67/28Network-specific arrangements or communication protocols supporting networked applications for the provision of proxy services, e.g. intermediate processing or storage in the network
    • H04L67/2823Network-specific arrangements or communication protocols supporting networked applications for the provision of proxy services, e.g. intermediate processing or storage in the network for conversion or adaptation of application content or format
    • H04L67/2828Network-specific arrangements or communication protocols supporting networked applications for the provision of proxy services, e.g. intermediate processing or storage in the network for conversion or adaptation of application content or format for reducing the amount or size of exchanged application data
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q2209/00Arrangements in telecontrol or telemetry systems
    • H04Q2209/20Arrangements in telecontrol or telemetry systems using a distributed architecture
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q2209/00Arrangements in telecontrol or telemetry systems
    • H04Q2209/60Arrangements in telecontrol or telemetry systems for transmitting utility meters data, i.e. transmission of data from the reader of the utility meter
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q2209/00Arrangements in telecontrol or telemetry systems
    • H04Q2209/70Arrangements in the main station, i.e. central controller

Abstract

The invention relates to a data acquisition method of a power consumption information acquisition system, which is used for a local network of the power consumption information acquisition system, wherein the local network comprises energy routers and an energy controller, the local network is a half-duplex communication network, and the data acquisition method specifically comprises the steps that the energy controller customizes data requirements for each energy router respectively, and each energy router initiatively reports data to the energy controller according to the data requirements; the energy controller realizes automatic data collection based on a channel competition mechanism with carrier sensing and collision avoidance, and the data acquisition method further comprises the step of uploading data by adopting a power consumption data uploading strategy based on a distributed structure. Compared with the prior art, the data acquisition method has the advantages of high stability, high response speed and high efficiency.

Description

Data acquisition method of electricity consumption information acquisition system
Technical Field
The invention relates to the field of power consumption information acquisition systems, in particular to a data acquisition method of a power consumption information acquisition system.
Background
The electricity consumption information acquisition system generally adopts a three-level structure including a main station, an acquisition terminal and an intelligent electric energy meter, wherein the main station is responsible for acquiring and processing the information of the whole network, the acquisition terminal is responsible for acquiring and processing the information of a distribution room, and the intelligent electric energy meter generates various data to be read. The acquisition terminal and the intelligent electric energy meters construct an acquisition system local communication network, the structure of the acquisition system local communication network is generally in a bus type or star type, server/client mode half-duplex communication is adopted, traditional data acquisition is generally initiated by the acquisition terminal, and each intelligent electric energy meter is read one by one according to data items. The acquisition mode has high occupancy rate on communication channels, and especially when the intelligent electric energy meters do not generate current reading data, and when the number of users in a station area is large, the acquisition terminal cannot complete polling of all the intelligent electric energy meters within a specified time, so that the acquisition success rate is reduced, and a large amount of invalid reading causes great waste of channel resources.
In order to support the application of the client-side ubiquitous power Internet of things, modular design concepts are adopted for a new-generation intelligent electric energy meter (energy router) and a new-generation acquisition terminal (energy controller), more flexible data transmission and management modes are supported, more terminal devices are allowed to be ubiquitous, monitoring and sensing devices of all specialties can be accessed into the system in the future, great troubles are brought to equipment operation management, the requirement of the client-side ubiquitous power Internet of things on communication performance is obviously improved, the requirement of full-data acquisition on data quality is hardly met by the existing acquisition mode, and the local communication of the system is required to be more efficient and real-time in order to adapt to different information acquisition requirements.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the data acquisition method of the electricity consumption information acquisition system, which has high stability, high response speed and high efficiency.
The purpose of the invention can be realized by the following technical scheme:
a data acquisition method of a power consumption information acquisition system is used for a local network of the power consumption information acquisition system, the local network comprises energy routers and an energy controller, the local network is a half-duplex communication network, the data acquisition method specifically comprises the steps that the energy controller customizes data requirements for each energy router respectively, and each energy router initiatively reports data to the energy controller according to the data requirements; the energy controller realizes automatic data collection based on a channel competition mechanism with carrier sensing and collision avoidance.
Further, the channel contention mechanism with carrier sensing and collision avoidance is a DCF mechanism based on a quality of service class, and a quality of service class is preset on each energy router.
Further, the DCF mechanism based on the service quality level is specifically configured to preferentially acquire the power consumption data uploaded by the energy router with the higher service quality level if the DCF mechanism detects a data collision.
Further, the energy router divides the electricity utilization data into data blocks to upload, and the length of each data block is smaller than a preset data packet length value. Because the length of the data packet is an important factor influencing whether the system adopts a basic mode or an RTS/CTS mode, the energy router divides the electricity utilization data into data blocks, and the purpose of controlling the operation mode of the electricity utilization information acquisition system is achieved.
Furthermore, the energy router uploads the electricity utilization data after compression, so that the occupation of the communication channel space is reduced.
Further, the data acquisition method further comprises the step of acquiring data by adopting a power utilization data uploading strategy based on a distributed structure.
Further, the power consumption data uploading strategy based on the distributed structure is specifically that the energy controller issues data requirements to the central coordinator in advance, the central coordinator records related information and issues the data requirements to the sites through broadcasting, the sites collect power consumption data of the energy router according to the clock timing and store the power consumption data in the sites, meanwhile, the sites report the stored power consumption data to the central coordinator according to the reporting period timing, and the energy controller reads the power consumption data in the central coordinator.
Further, the energy controller customizes data requirements for each energy router according to the performance of each energy router.
Further, the energy controller issues task requirements based on a management strategy of the distributed tasks, and coordinates low loads of the application servers corresponding to the energy controller.
Further, the local network further includes an edge computing node and an intermediate node, the edge computing node is used for connecting the energy router and has functions of network communication, data processing and data storage, and the intermediate node is used as a relay of the local communication network and has a function of network communication. In order to meet the requirement that an energy router of a new generation of intelligent electric meters participates in power grid regulation, a proper node is selected as an edge computing node to share the task of an energy controller, and the average end-to-end delay of flow is favorably reduced.
Compared with the prior art, the invention has the following advantages:
(1) the invention realizes the automatic collection of data based on a channel competition mechanism with carrier sense, collision avoidance and service quality grade, can effectively reduce the occupation of a communication channel, provides precious channel resources for the real-time transmission or active reporting of important data, improves the real-time property of the reporting of the important data, and provides valuable information for management and operation decision. If the power failure information is actively reported, the active rush repair of the distribution network fault can be supported, the power failure time of a user is reduced, and the power failure range is reduced.
(2) According to the invention, an acquisition task distributed execution and optimized scheduling strategy is adopted, each central coordinator and each station execute an acquisition task first and share the task processing of the energy source controller, compared with an execution mode that all tasks are initiated by the energy source controller at present, the execution efficiency of the acquisition task can be greatly improved, the resource consumption of an acquisition terminal is reduced, the development of more advanced application functions can be supported, the business applications such as demand side response and bidirectional interaction can be better realized, and the ubiquitous power internet of things ecological circle construction of a client side is supported.
(3) According to the invention, the energy router divides the electricity utilization data into the data blocks to be uploaded, so that the purpose of controlling the operation mode of the electricity utilization information acquisition system is achieved, and the stability of the electricity utilization information acquisition system for data acquisition is improved.
(4) The energy controller customizes data requirements for each energy router according to the performance of each energy router, issues task requirements based on the management strategy of the distributed tasks, and ensures that each application server corresponding to the energy controller and each energy router are in a better load state, so that the overall load capacity, the resource utilization rate and the response speed of the system are improved, and the satisfaction degree of users is improved.
(5) The local network also comprises an edge computing node and a middle node, wherein the edge computing node has the functions of data processing and data storage and is used for sharing the task of the energy controller, the middle node is used as a relay of the local communication network, the requirement that an energy router of a new generation of intelligent electric meters participates in power grid regulation is met, the task of the energy controller is shared, the average end-to-end delay of flow is reduced, and therefore the response speed of data acquisition is improved.
Drawings
FIG. 1 is a schematic flow chart of a data acquisition method of the electricity consumption information acquisition system according to the present invention;
FIG. 2 is a schematic diagram of a local network structure including edge compute nodes and intermediate nodes according to the present invention;
fig. 3 is a schematic diagram of the steps of the local network including the edge computing node and the intermediate node, wherein (r), (g) and (g) are the sequence of network communication.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
Example 1
As shown in fig. 1, this embodiment is a data acquisition method of a power consumption information acquisition system, which is used for a local network of the power consumption information acquisition system, where the local network includes energy routers and energy controllers, the local network is a half-duplex communication network, and the data acquisition method specifically includes that the energy controllers customize data requirements for each energy router, and each energy router actively reports data to the energy controllers according to the data requirements; the energy controller realizes automatic data collection based on a channel competition mechanism with carrier sensing and collision avoidance.
The following describes a data acquisition method of the power consumption information acquisition system in this embodiment in detail:
the data acquisition method of the electricity consumption information acquisition system comprises a task generation stage, a data uploading stage and an automatic data collection stage.
1. Task generation phase
The energy controller generates task requirements based on a management strategy of the distributed tasks, and customizes data requirements for each energy router according to the performance of each energy router.
The management strategy of the distributed tasks in this embodiment adopts a management method suitable for the distributed tasks of the power system, as disclosed in the invention with the publication number CN105139130A, to generate the distributed task requirements.
2. Data upload phase
The method comprises the steps that a power utilization data uploading strategy based on a distributed structure is adopted for data acquisition, specifically, an energy controller issues data requirements to a Central Coordinator (CCO) in advance, the central coordinator records relevant information and issues the data requirements to a Station (STA) through broadcasting, the station acquires the power utilization data of an energy router according to clock timing and stores the power utilization data in the station, meanwhile, the station reports the stored power utilization data to the central coordinator according to a reporting period, and the energy controller reads the power utilization data in the central coordinator. A Central Coordinator (CCO) and a Station (STA) are both devices widely existing in the existing power consumption information collection system.
The specific process of the electricity consumption data uploading strategy based on the distributed structure comprises the following steps:
(1) after being powered on, the CCO actively acquires the clock of the energy source controller, and after being powered on, the STA actively acquires the address information (list) of the energy source router;
(2) the CCO is synchronous with all STA clocks in the network;
(3) sending a collection data item with collection density under the energy controller, recording related information by the CCO, sending the related information to the STA, and updating the collection density and the collection data item by the STA;
(4) when the STA periodically collects task time, copying and reading the data of the energy router according to the configuration of the collected data items and storing the data;
(5) when the STA reporting period is up, reporting the curve data in the reporting period to the CCO;
(6) the concentrator reads the curve data of the electric meters in the CCO, and the CCO responds to the curve data of the corresponding electric meters.
In this embodiment, the STA stores 1440 point meter curve data for 1 day, the CCO caches the meter curve data in all the energy routers 1h in the platform area, and the energy controller may read the meter curve data in the CCO and may also read the meter curve data in the STA.
The tasks are distributed on all STAs based on a power consumption data uploading strategy of a distributed structure, curve data of all energy routers are collected in the CCO, and the energy controller can obtain the electric energy data of all energy routers in the station area only by regularly reading the curve data of all electric energy meters in the CCO. And the acquisition density is configured to be 1min, so that the minute curve data acquisition of all the energy routers can be realized, and the energy controller acquires the data of all the energy routers in the platform area according to the minute density, so that the minute line loss management can be realized.
Because the length of the data packet is an important factor influencing whether the system adopts a basic mode or an RTS/CTS mode, the energy router divides the electricity utilization data into data blocks, the length of the data blocks is smaller than a preset data packet length value, and the preset data packet length value can be set according to specific requirements.
And the energy router compresses the electricity utilization data divided into data blocks and then uploads the electricity utilization data so as to reduce the occupied space of a transmission channel.
As shown in fig. 2 and 3, as the energy router of the new-generation smart electric meter, the energy router realizes comprehensive information sensing and real-time transmission, coordinates and controls the source network charge storage, improves the capability of the client side to deeply participate in the power grid regulation, effectively promotes the development of energy services such as ordered charging, distributed energy storage and clean energy consumption, and meets the diversified power consumption requirements of the people. Therefore, the present embodiment is provided with an edge computing node and an intermediate node on the client side, so as to divide the nodes in the local network into three types:
(1) the energy router is used for sending data and requests to the edge computing node besides the basic functions of network communication;
(2) the edge computing node has the basic functions of network communication, processes data and requests sent by the energy router, has the functions of data processing and data storage, and returns the processed data and responses to the requests to the energy router or sends the processed data and responses to the requests to the energy controller after the processing is finished;
(3) the intermediate node is a node which is neither an energy router nor edge computing capability, and only has the basic function of network communication to be used as a relay of a local communication network.
After the edge computing node is determined, once the data and the request are generated by the energy router, the processing steps are as follows:
s1: the energy router sends the data and the requested flow information to the controller;
s2: the energy controller calculates to obtain which edge computing nodes the flows are to be forwarded to and through which paths the flows are to be forwarded according to the current network and the use conditions of various resources, issues the segmented routing forwarding rule to the energy router, and informs the relevant edge computing nodes of reserving resources; if the processed data and the response to the request need to be sent to the energy router, the energy controller also calculates which paths to forward through according to the current network and the use condition of various resources, and sends the segment routing forwarding rule to the edge computing node;
s3: after receiving the response of the energy controller, the energy router sends the flow according to the rule issued by the energy controller;
s4: and the edge computing node receives the flow and then processes the flow, after receiving the response of the energy controller, the edge computing node sends the flow according to the rule issued by the energy controller, and finally the energy router receives the processed data sent by the edge computing node and the response to the request.
The number of edge computing nodes, the load balancing degree of computing resources and network resources may affect the average end-to-end delay of traffic; the average end-to-end delay can be effectively reduced by selecting a small number of proper nodes as edge computing nodes and then balancing and allocating the loads of computing resources and network resources to proper degrees through a power consumption data uploading strategy of a distributed structure.
3. Automatic data aggregation phase
The energy controller realizes automatic data collection based on a channel competition mechanism with carrier sensing and collision avoidance, the channel competition mechanism with carrier sensing and collision avoidance is a DCF mechanism based on service quality grades, each energy router is preset with a service quality grade, and if the DCF mechanism detects data collision, power utilization data uploaded by the energy router with the higher service quality grade is preferentially acquired so as to reduce system overhead caused by excessive competition windows.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.

Claims (7)

1. A data acquisition method of a power consumption information acquisition system is used for a local network of the power consumption information acquisition system, the local network comprises an energy router and an energy controller, and the local network is a half-duplex communication network; the energy controller realizes automatic data collection based on a channel competition mechanism with carrier sensing and collision avoidance;
the data acquisition method further comprises the step of uploading data by adopting a power utilization data uploading strategy based on a distributed structure;
the power consumption data uploading strategy based on the distributed structure is characterized in that the energy controller issues data requirements to the central coordinator in advance, the central coordinator records relevant information and issues the data requirements to the sites through broadcasting, the sites collect power consumption data of the energy router according to clock timing and store the power consumption data in the sites, meanwhile, the sites report the stored power consumption data to the central coordinator according to a reporting period, and the energy controller reads the power consumption data in the central coordinator.
2. The data acquisition method of an electricity consumption information acquisition system according to claim 1, wherein the channel contention mechanism with carrier sensing and collision avoidance is a DCF mechanism based on a quality of service class, and each of the energy routers has a quality of service class preset thereon.
3. The data acquisition method of the electricity consumption information acquisition system according to claim 1, wherein the energy router divides the electricity consumption data into data blocks for uploading, and the length of the data blocks is smaller than a preset data packet length value.
4. The data acquisition method of the electricity consumption information acquisition system according to claim 1, wherein the energy router compresses the electricity consumption data and uploads the compressed electricity consumption data.
5. The data collection method of claim 1, wherein the energy controller customizes data requirements for each of the energy routers based on the performance of each of the energy routers.
6. The data acquisition method of the electricity consumption information acquisition system according to claim 1, wherein the energy controller issues task requirements based on a management strategy of distributed tasks.
7. The data collection method of an electrical information collection system according to claim 1, wherein the local network further comprises an edge computing node and an intermediate node, the edge computing node is connected to the energy router and has functions of network communication, data processing and data storage, and the intermediate node is used as a relay of the local communication network and has a function of network communication.
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