CN111769800B - Data processing mechanism of photovoltaic power station data acquisition unit under off-grid state - Google Patents

Data processing mechanism of photovoltaic power station data acquisition unit under off-grid state Download PDF

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Publication number
CN111769800B
CN111769800B CN202010196802.XA CN202010196802A CN111769800B CN 111769800 B CN111769800 B CN 111769800B CN 202010196802 A CN202010196802 A CN 202010196802A CN 111769800 B CN111769800 B CN 111769800B
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data
acquisition unit
power station
national
network
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CN111769800A (en
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徐飞
王志成
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Snegrid Electric Technology Co ltd
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Snegrid Electric Technology Co ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S50/00—Monitoring or testing of PV systems, e.g. load balancing or fault identification
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
    • H02J13/00016—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
    • H02J13/00022—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using wireless data transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/10—Protocols in which an application is distributed across nodes in the network
    • H04L67/1095—Replication or mirroring of data, e.g. scheduling or transport for data synchronisation between network nodes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
    • Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
    • Y04S40/124—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wired telecommunication networks or data transmission busses
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
    • Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
    • Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Power Engineering (AREA)
  • Signal Processing (AREA)
  • Supply And Distribution Of Alternating Current (AREA)
  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)

Abstract

The invention discloses a data processing mechanism of a photovoltaic power station data collector in an off-grid state, and relates to the technical field of electric power data collection. The invention mainly comprises the following steps: initializing a system; collecting inverter data and maintaining communication with the platform; and storing and transmitting data. The invention stores data information when the network is disconnected, and adds time information to each frame of data; setting a data uploading time period when historical data are uploaded, and uploading the historical data when a national network platform server is idle so as to reduce the platform burden; the data uploading times are set, the data are successfully sent and stopped to be sent, the data are unsuccessfully sent and tried to be sent for multiple times, the historical data are prevented from being sent by mistake, missed and frequently, the problems that the historical data of the data collector are uploaded ceaselessly, are uploaded disorderly and the like due to network interruption are solved, the data of the power station are more perfect, and the traceability of faults is realized.

Description

Data processing mechanism of photovoltaic power station data acquisition unit under off-grid state
Technical Field
The invention belongs to the technical field of electric power data acquisition, and particularly relates to a data processing mechanism of a data acquisition device of a photovoltaic power station in an off-grid state.
Background
The data collector is a special hardware device for monitoring and controlling national power station information. After the data acquisition unit is accessed, the panoramic monitoring can be carried out on photovoltaic projects in the area from the dimensionalities of installation, power generation, operation and maintenance and the like of the power station, the conditions of the health distribution state, the power generation benefit and the like of the power station can be remotely controlled in real time, and the real-time tracking management of the power station is realized.
When the collector normally operates, the data of the power station is lost due to network interruption: 1. the photovoltaic monitoring center cloud platform server is unstable, so that network breakdown is caused, the network connection of the data collector is disconnected, the equipment is in a reconnection state, and data cannot be sent; 2. the construction of a photovoltaic power station is not standard, the power station is in a mountain area or a depression, the signal quality is poor, and the network connection of a data collector is not smooth and is interrupted frequently. The data acquisition unit for the photovoltaic power station has a data storage function, and the data acquisition unit partially has a breakpoint continuous transmission function. The data storage and the breakpoint continuous transmission function can improve the loss of the power station data. However, the existing breakpoint resume function uploading has the following problems: 1. when networking is carried out, the historical state information is uploaded continuously, so that the current state information cannot be uploaded normally; 2. when the network is connected, the uploaded historical state data is disordered, and the national network platform cannot be analyzed normally.
Disclosure of Invention
The invention aims to provide a data processing mechanism of a photovoltaic power station data collector in an off-network state, and solves the problems of non-stop uploading, disordered uploading and the like of historical data of the data collector caused by network interruption. Storing data information when the network is disconnected, and adding time information to each frame of data; setting a data uploading time period when historical data are uploaded, and uploading the historical data when a national network platform server is idle so as to reduce the platform burden; and setting data uploading times, stopping sending when the sending is successful, and trying to send for multiple times when the sending is failed, so that the historical data is prevented from being sent by mistake, missed and frequently.
The invention is realized by the following technical scheme:
the invention relates to a data processing mechanism of a photovoltaic power station data collector in an off-network state, which comprises the following steps:
firstly, initializing system hardware;
secondly, running a system program;
thirdly, the data acquisition unit communicates with the inverter through an interface of the 485 communication chip to read equipment information; meanwhile, the data acquisition unit keeps communication with the national network platform, whether the data acquisition unit is in a network connection state or not is detected, if the data acquisition unit is successfully connected with the national network platform, the inverter data are sent to the national network platform, then the data acquisition unit waits for receiving a return instruction sent by the national network platform, and the step II is returned; if the connection with the national power grid platform fails, the fourth step is carried out;
step four, the data acquisition unit processes the acquired inverter data through the single chip microcomputer, stores the data into the FLASH chip, sets the flag position of the storage state to 1, then judges the network connection state of the data acquisition unit and the network platform, and continues to store the data if the connection is unsuccessful; if the networking is successful, judging whether the current time is nine night, if not, returning to the step two, recording the retransmission times as 0, if so, transmitting the data stored in the FLASH chip, and judging whether the storage mark position of the transmitted data is 1; if not, returning to the step two, if so, continuously judging whether the number of times of triggering the condition is 0 or not; if not, returning to the step two, if so, sending the stored inverter data to the national grid platform, and recording the retransmission times as 1; the storage data is transmitted only once every day no matter whether the storage data is successfully transmitted to the national network or not; and returning to the step two.
Further, when the singlechip stores the data in the FLASH chip, whether the FLASH chip is full is read; if yes, deleting previous inverter data, and then storing the latest data into the FLASH chip, and if not, directly storing the latest data into the FLASH chip.
Further, if the stored inverter data is successfully sent to the national network platform in the fourth step, the data acquisition unit receives a return instruction issued by the national network platform, and clears the stored data in the FLASH chip, and the data storage flag position is clear 0.
Furthermore, the singlechip of the data acquisition unit is communicated with a national network platform through a GSM or GPS module.
Further, the model of the FLASH chip is W25Q 64.
The invention has the following beneficial effects:
the invention stores data information when the network is disconnected, and adds time information to each frame of data; setting a data uploading time period when historical data are uploaded, and uploading the historical data when a national network platform server is idle so as to reduce the platform burden; the data uploading times are set, the data are successfully sent and stopped to be sent, the data are unsuccessfully sent and tried to be sent for multiple times, the historical data are prevented from being sent by mistake, missed and frequently, the problems that the historical data of the data collector are uploaded ceaselessly, are uploaded disorderly and the like due to network interruption are solved, the data of the power station are more perfect, and the traceability of faults is realized.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a hardware framework diagram of the present invention.
FIG. 2 is a software flow diagram of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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 invention.
The invention relates to a data processing mechanism of a photovoltaic power station data collector in an off-network state, which comprises the following steps:
firstly, initializing system hardware;
secondly, running a system program;
thirdly, the data acquisition unit communicates with the inverter through an interface of the 485 communication chip to read equipment information; meanwhile, the data acquisition unit keeps communication with the national network platform, whether the data acquisition unit is in a network connection state or not is detected, if the data acquisition unit is successfully connected with the national network platform, the inverter data are sent to the national network platform, then the data acquisition unit waits for receiving a return instruction sent by the national network platform, and the step II is returned; if the connection with the national power grid platform fails, the fourth step is carried out;
step four, the data acquisition unit processes the acquired inverter data through the single chip microcomputer, stores the data into the FLASH chip, sets the flag position of the storage state to 1, then judges the network connection state of the data acquisition unit and the network platform, and continues to store the data if the connection is unsuccessful; if the networking is successful, judging whether the current time is nine night, if not, returning to the step two, recording the retransmission times as 0, if so, transmitting the data stored in the FLASH chip, and judging whether the storage mark position of the transmitted data is 1; if not, returning to the step two, if so, continuously judging whether the number of times of triggering the condition is 0 or not; if not, returning to the step two, if so, sending the stored inverter data to the national grid platform, and recording the retransmission times as 1; the storage data is transmitted only once every day no matter whether the storage data is successfully transmitted to the national network or not; and returning to the step two.
When the single chip microcomputer stores the data in the FLASH chip in the step two, whether the FLASH chip is full of memory is read; if yes, deleting previous inverter data, and then storing the latest data into the FLASH chip, and if not, directly storing the latest data into the FLASH chip.
If the stored inverter data is successfully sent to the national network platform in the fourth step, the data acquisition unit receives a return instruction issued by the national network platform, and clears the stored data in the FLASH chip, and the position of the data storage mark is clear 0.
The single chip microcomputer of the data acquisition unit is communicated with the national network platform through a GSM or GPS module.
Wherein the model of the FLASH chip is W25Q 64.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims (5)

1. A data processing method of a photovoltaic power station data collector in an off-grid state is characterized by comprising the following steps: the method comprises the following steps:
firstly, initializing system hardware;
secondly, running a system program;
thirdly, the data acquisition unit communicates with the inverter through an interface of the 485 communication chip to read equipment information; meanwhile, the data acquisition unit keeps communication with the national network platform, whether the data acquisition unit is in a network connection state or not is detected, if the data acquisition unit is successfully connected with the national network platform, the inverter data are sent to the national network platform, then the data acquisition unit waits for receiving a return instruction sent by the national network platform, and the step II is returned; if the connection with the national power grid platform fails, the fourth step is carried out;
step four, the data acquisition unit processes the acquired inverter data through the single chip microcomputer, stores the data into the FLASH chip, sets the storage mark position to be 1, then judges the network connection state of the data acquisition unit and the network platform, and continues to store the data if the connection is unsuccessful; if the networking is successful, judging whether the current time is nine night, if not, returning to the step two, recording the retransmission times as 0, if so, transmitting the data stored in the FLASH chip, and judging whether the storage mark position of the transmitted data is 1; if not, returning to the step two, if so, continuously judging whether the previous triggering times are 0; if not, returning to the step two, if so, sending the stored inverter data to the national grid platform, and recording the retransmission times as 1; the storage data is transmitted only once every day no matter whether the storage data is successfully transmitted to the national network or not; and returning to the step two.
2. The data processing method of the photovoltaic power station data collector in the off-network state as claimed in claim 1, wherein the singlechip in the fourth step reads whether the FLASH chip is full when storing the data in the FLASH chip; if yes, deleting previous inverter data, and then storing the latest data into the FLASH chip, and if not, directly storing the latest data into the FLASH chip.
3. The data processing method of the photovoltaic power station data collector in the off-network state as claimed in claim 1, wherein in the fourth step, if the stored inverter data is successfully sent to the national network platform, the data collector receives a return instruction issued by the national network platform, and clears the stored data in the FLASH chip, and the data storage flag position is clear 0.
4. The data processing method of the photovoltaic power station data collector in the off-network state as claimed in claim 1, wherein the singlechip of the data collector is in communication with a national network platform through a GSM or GPS module.
5. The data processing method of the photovoltaic power station data collector in the off-network state as claimed in claim 1, wherein the model of the FLASH chip is W25Q 64.
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