CN107394893A - A kind of photovoltaic power station monitoring system and its method - Google Patents
A kind of photovoltaic power station monitoring system and its method Download PDFInfo
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- CN107394893A CN107394893A CN201710617118.2A CN201710617118A CN107394893A CN 107394893 A CN107394893 A CN 107394893A CN 201710617118 A CN201710617118 A CN 201710617118A CN 107394893 A CN107394893 A CN 107394893A
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- 101710167643 Serine/threonine protein phosphatase PstP Proteins 0.000 claims abstract description 27
- 238000006243 chemical reaction Methods 0.000 claims abstract description 22
- 230000005540 biological transmission Effects 0.000 claims abstract description 7
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- 238000004891 communication Methods 0.000 claims description 11
- 230000004913 activation Effects 0.000 claims description 6
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- 238000012423 maintenance Methods 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 7
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- 230000004888 barrier function Effects 0.000 description 1
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- 229910002056 binary alloy Inorganic materials 0.000 description 1
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- H02J13/0003—
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- H02J13/0013—
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- 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
- H04L67/02—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP]
- H04L67/025—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP] for remote control or remote monitoring of applications
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- 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
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
- H04L67/125—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks involving control of end-device applications over a network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/08—Protocols for interworking; Protocol conversion
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- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02B90/20—Smart grids as enabling technology in buildings sector
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- 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
- Y04S40/128—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 involving the use of Internet protocol
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Abstract
The present invention discloses a kind of photovoltaic power station monitoring system and its method, and its system is made up of remote monitoring platform, field application platform, photovoltaic plant terminal device；Photovoltaic plant terminal device is made up of collecting transmitter, protocol conversion apparatus and inverter control plate；Remote monitoring platform carries out Web transmission by Internet network and field application platform and serviced, and field application platform is connected by RS485 with photovoltaic plant terminal device, and BACnet/MSTP networks are connected to form by RS485 between photovoltaic plant terminal device.The system overcomes the shortcomings of the existing monitoring technology of photovoltaic plant, the characteristics of playing BACnet strong interoperabilities, solve transmission and the operational issue of multiple mutual information of photovoltaic plant terminal device, the data message output of specification and unified photovoltaic plant, there is provided a kind of reliable, practical, consistent multiple photovoltaic power station monitoring systems and its method.
Description
The present invention relates to monitoring technology field, more specifically, more particularly to a kind of photovoltaic power station monitoring system and its side
Method.
Background technology
The photovoltaic power station monitoring system application of early stage is not wide, and needs attendant to garrison at the scene, intelligent journey
Degree is not high, causes the waste of manpower, material resources and financial resources.With the development of information technology, and the raising of photovoltaic generation total installed capacity amount,
People propose higher requirement to photovoltaic monitoring system.In order to which preferably scattered photovoltaic power station power generation system is managed concentratedly
And scheduling, increase operation rate, monitoring the operation conditions of photovoltaic plant in real time becomes more and more important.
On the other hand, as monitoring technology constantly develops to intelligentized direction, people to the reliability of monitoring system and
The requirement more and more higher of interoperability etc., interoperability be a robot control system(RCS) have optimal performance/price than have
Try hard to keep barrier.After this demand occurs, many enterprises develop different standards, such as CAN according to the products characteristics of oneself,
MODBUS, LonTalk, PROFIBUS, EIB etc..(the controller network based on CAN of patent document 200910145539.5
Monitoring system and monitoring method) while the CAN Communications Interface Unit of compatible different manufacturers, flexibly configurable application layer
Agreement, it is real-time, but it can not be interconnected with Internet, it is impossible to realize that remote information is shared.Patent document
201010261703.1 (means of communication based on MODBUS agreements to monitoring inverter) are used for solar energy simultaneously by designing one kind
The working state recording of inverter locally preserves machine flow in net electricity generation system, and improves MODBUS protocol instructions so that monitoring meter
Calculation machine can completely record the running situation of inverter, but MODBUS frames type and component type definition mode are excessively simple,
It can not by force complicate, express data type clearly in the monitoring system of high-intelligentization, its single master-slave mode also makes it
Can not timely processing equipment fault the problems such as.
BACnet standards are the open organizational standards in first, building automation field, and any company or individual can participate in
The discussion and modification of the standard, it is the embodiment of building automation field advanced technology, represents the newest direction of field development.
BACnet/MSTP (principal and subordinate's token) agreement is one of several link layer solutions of BACnet, due to its cost performance, reliability compared with
Height, it is widely used in fieldbus networks.It is proposed that photovoltaic plant terminal device is incorporated into BACnet-MS/TP by a sets of plan
In network, intelligent monitoring and the interoperability of monitoring system are realized, it is clear that be of great significance.
The content of the invention
It is an object of the invention to overcome the shortcomings of the existing monitoring technology of photovoltaic plant, the strong interoperabilities of BACnet are played
Advantage, there is provided a kind of photovoltaic power station monitoring system and its method.
In order to achieve the above object, the technical solution adopted by the present invention is as follows：
A kind of photovoltaic power station monitoring system, the system is by remote monitoring platform, field application platform, photovoltaic plant terminal
Equipment forms；Photovoltaic plant terminal device is made up of collecting transmitter, protocol conversion apparatus and inverter control plate；Its feature
It is, remote monitoring platform carries out Web transmission by Internet network and field application platform and serviced, and field application platform leads to
Cross RS485 with photovoltaic plant terminal device to be connected, BACnet/ is connected to form by RS485 between photovoltaic plant terminal device
MSTP networks；Field application platform is used to receive the failure of photovoltaic plant terminal device, event, alert data or query facility fortune
Row state, statistical information etc., remote monitoring platform are received or inquired about data as defined in this standard or letter by field application platform
Breath.
The hardware components of photovoltaic plant terminal device are by DSP Processor and man-machine interface, MSTP network interface cards, data acquisition turn
The ancillary equipment such as block, RS485 output modules composition is changed the mold, its annexation is：DSP Processor respectively with man-machine interface, MSTP
Network interface card, Data collecting conversion module, RS485 modules are connected；DSP Processor passes through MSTP network interface cards and BACnet/MSTP network phases
Even；DSP Processor is connected by Data collecting conversion module with collecting transmitter；DSP Processor passes through RS485 modules and inverse
Become device control panel to be connected.
The data link layer of system uses BACnet/MSTP networks.This network is transmitted medium using token mechanism
Access control, an only home site holds token in system, and the home site for only holding token just can be to other websites
Information and instruction are sent, other websites only have the function of receiving and monitor, only could perform response when responding home site
Instruction.Wherein website obtains the time-out time of response and is provided with according to system, when website is answered in response time-out time
Answer, or reach response time-out time, token is just pressed site address order transmission.
One photovoltaic plant terminal device and field application platform respectively form the home site of a BACnet/MSTP network,
BACnet/MSTP networks are formed between each photovoltaic plant terminal device and field application platform, are operated under ad-hoc mode.
A kind of photovoltaic power station monitoring system, home site is supported to be accessed across route.
A kind of control section in photovoltaic power station monitoring system and its method includes：Total activation module, control algolithm module,
Object management module, protocol conversion module and communication module；The total activation module completes the initialization and each mould to each module
Coordinated scheduling work between block；The control algolithm module completes the logic control of photovoltaic plant terminal device, realizes to right
As the judgement and operation of currency；The object management module completes BACnet object properties all to photovoltaic plant terminal device
Definition, initialization, safeguard and update；The protocol conversion module complete from the running status of photovoltaic plant terminal device, failure,
The information such as event, alarm provide the conversion of protocol format to BACnet standards；The communication module completes each photovoltaic plant terminal
Communication between equipment, between photovoltaic plant terminal device and field application platform.
A kind of photovoltaic power station monitoring system and its method, its monitoring method are as follows：
Step 1：System starts, into init state；
Step 2：By the human-computer interface module of each photovoltaic plant terminal device, to the object instance attribute of each equipment
Carry out parameter configuration；The attribute of some of which object instance can be matched somebody with somebody after example generation in object management module
Put, can also be determined when generating example；Each photovoltaic plant terminal device is added to BACnet/MSTP network token logics
In ring, run under ad-hoc mode；
Step 3：Application platform, the backstage of remote monitoring platform configure light according to customized information and form at the scene
The information of overhead utility terminal device, and formed and associated with the equipment of step 2；
Step 4：Photovoltaic plant terminal device gathers photovoltaic plant real time status information and key equipment parameter, by inverter
The data such as the DC voltage of control panel, DC current, alternating voltage, the temperature parameter of alternating current and environment, irradiation parameters
By man-machine interface, shown in the form of the data output of BACnet standards；
Step 5：When photovoltaic plant terminal device home site receives inquiry or control instruction, according to the instruction corresponding
Information-package is sent to the website for holding token, and by holding the website of token, calculated according to the control of system into data frame format
Method sends corresponding information to other websites, and each website performs corresponding work, and refreshes the currency of object properties, with
Inquire about and control for remote monitoring platform, finally realize the effective monitoring to system；
Step 6：The time for holding token when website does not obtain response in response time-out time, or is not reaching to response
Time-out time, then 4 are gone to step, token is otherwise transmitted to next website, and go to step 4.
Compared with prior art, the advantage of the invention is that：Using BACnet standard mechanism specification and unified photovoltaic
The data message output of power station terminal device, can be achieved with the seamless access of most of main flow building control system, be beneficial to enterprise and
Subscriber Unit reduces industry input, while improves the uniformity of photovoltaic power station monitoring system；Medium is carried out using token mechanism
Control accesses, and when equipment breaks down, can actively be alarmed in time, and enterprise and Subscriber Unit can grasp light in the very first time
The fault message of overhead utility control system, in time on site fault clearing, meanwhile, enterprise and Subscriber Unit can be by photovoltaic electrics
Various fault messages of standing are acquired, analyzed, and update product quality, improve reliability, the reality of photovoltaic power station monitoring system
The property used.
Brief description of the drawings
Fig. 1 photovoltaic power station monitoring system group-network constructions
Fig. 2 photovoltaic plant terminal hardware block diagrams
Fig. 3 monitoring systems control section
The implementation method of Fig. 4 photovoltaic power station monitoring systems
Fig. 5 BACnet protocol massages handling processes
Embodiment
As shown in figure 1, a kind of photovoltaic power station monitoring system, the system is by remote monitoring platform, field application platform, light
Overhead utility terminal device forms；Wherein, photovoltaic plant terminal device is by collecting transmitter, protocol conversion apparatus and inverter control
Making sheet forms；Taken characterized in that, remote monitoring platform carries out Web transmission by Internet network and field application platform
Business, field application platform are connected by RS485 with photovoltaic plant terminal device, pass through RS485 between photovoltaic plant terminal device
It is connected to form BACnet/MSTP networks；Field application platform is used for the failure, event, alarm for receiving photovoltaic plant terminal device
Data or query facility running status, statistical information etc., remote monitoring platform are received or inquired about this mark by field application platform
Data as defined in standard or information.
As shown in Fig. 2 the hardware components of photovoltaic plant terminal device by DSP Processor and man-machine interface, MSTP network interface cards,
The ancillary equipment such as Data collecting conversion module, RS485 output modules form, and its annexation is：DSP Processor respectively with it is man-machine
Interface, MSTP network interface cards, Data collecting conversion module, RS485 modules are connected；DSP Processor passes through MSTP network interface cards and BACnet/
MSTP networks are connected；DSP Processor is connected by Data collecting conversion module with collecting transmitter；DSP Processor passes through
RS485 modules are connected with inverter control plate.
As shown in figure 3, the control section in photovoltaic power station monitoring system and its method includes：Total activation module, control are calculated
Method module, object management module, protocol conversion module and communication module；The total activation module completes the initialization to each module
Coordinated scheduling work between each module；The control algolithm module completes the logic control of photovoltaic plant terminal device, real
The now judgement and operation to object currency；The object management module completes BACnet pairs all to photovoltaic plant terminal device
As attribute definition, initialization, maintenance and renewal；The protocol conversion module completes the operation shape from photovoltaic plant terminal device
The information such as state, failure, event, alarm provide the conversion of protocol format to BACnet standards；The communication module completes each photovoltaic
Communication between the terminal device of power station, between photovoltaic plant terminal device and field application platform.
As shown in figure 4, a kind of photovoltaic power station monitoring system, its monitoring method is as follows：
Step 1：System starts, into init state；
Step 2：By the human-computer interface module of each photovoltaic plant terminal device, to the object instance attribute of each equipment
Carry out parameter configuration；The attribute of some of which object instance can be configured after example generation in object module,
It can be determined when generating example；Each photovoltaic plant terminal device is added in BACnet/MSTP network token logic boxs,
Run under ad-hoc mode；
When defining object instance, 1 photovoltaic plant terminal device 1 " Device " object instance, n " Analog
Input " object instances (being determined by the analog input object number monitored), n " Analog Output " object instances are (by supervising
The simulation output object number of control determines), n " Analog Value " object instances (being determined by the setting value number monitored), n
It is individual that " Binary Input " object instances (being determined by the binary input object number monitored), n " Binary Output " are right
As example (being determined by the binary system object output number monitored), 1 " Calendar " object instance and 1 " Event
Enrollment " object instances represent；
In the present system, by " exemplified by Analog Input " object instances (input current), based on BACnet standard frequency conversions
" Analog Input " objects are defined water pump system with following structure：
In the present system, input current Analog Input object instances property value sets such as following table：
Step 3：Application platform, the backstage of remote monitoring platform are according to customized information at the scene, with step 2BACnet
The data format of standard, the information of photovoltaic plant terminal device is configured, and formed and associated with the equipment of step 2；
Step 4：Photovoltaic plant terminal device gathers photovoltaic plant real time status information and key equipment parameter, by inverter
The data such as the DC voltage of control panel, DC current, alternating voltage, the temperature parameter of alternating current and environment, irradiation parameters
By man-machine interface, shown in the form of the data output of BACnet standards；
Step 5：When photovoltaic plant terminal device home site receives inquiry or control instruction, according to the instruction corresponding
Information-package is sent to the website for holding token, and by holding the website of token, calculated according to the control of system into data frame format
Method sends corresponding information to other websites, and each website performs corresponding work, and refreshes the currency of object properties, with
Inquire about and control for remote monitoring platform, finally realize the effective monitoring to system；
When photovoltaic plant terminal device receives inquiry and during control command, that is, receive " ReadProperty ",
" ReadPropertyMultiple ", " WriteProperty ", " WritePropertyMultiple ", " Who-has " and " I-
Application layer services, the terminal device such as have ", " Who-is " and " I-am " send response message according to order；Field application platform
Serviced to photovoltaic plant terminal device predetermined C OV, under the BACnet objects of scheduled COV services exceed higher limit or are less than
During limit value, photovoltaic plant terminal device to field application platform send " ConfirmedCOVNotification " or
" ConfirmedEventNotification ", is achieved in event and alert service；
Such as Fig. 5, the encoding and decoding of a BACnet/MSTP application service need to pass through application layer protocol data cell APDU, net
Four levels such as network layers protocol Data Unit NPDU, data link layer and physical layer protocol data unit.BACnet application layer category
In information processing layer, major function is that BACnet objects are conducted interviews and managed.Used in this example in photovoltaic power station monitoring system
The application layer services arrived be " ReadProperty ", " ReadPropertyMultiple ", " WriteProperty ",
" WritePropertyMultiple ", " Who-has " and " I-have ", " Who-is " and " I-am ",
" ConfirmedCOVNotification " and " ConfirmedEventNotification " etc.；
By taking " ReadProperty " as an example, according to the regulation of BACnet standards, the APDU of " ReadProperty " message is compiled
Code ASN.1 is defined as follows：
When photovoltaic plant terminal device is received when " ReadProperty " from field application platform asks service (here
Assuming that reading the value of input current), terminal device sends response message according to this order, by the value of present input current by application
The form of layer protocol data cell APDU codings, puts into APDU user data part, then by Network layer Protocol Data unit and
The coded format of data link layer, data are packaged into data frame format information is transmitted on physical medium.When field application is put down
After platform is connected to frame structure data from physical medium, just decoded by opposite step, until application layer entity is to receiving
APDU explain, and perform corresponding application protocol code, real-time update object properties, and refresh the current of object properties
Value, so that remote monitoring platform is inquired about and is controlled, when remote monitoring platform sends inquiry by Intenet to field application platform
During with order, the intelligent monitoring function of whole system according to above-mentioned step encoding and decoding, will be finally realized.
Claims (7)
1. a kind of photovoltaic power station monitoring system, the system is whole by remote monitoring platform, field application platform and photovoltaic plant
End equipment forms；Wherein, photovoltaic plant terminal device is by collecting transmitter, protocol conversion apparatus and inverter control plate group
Into；Serviced characterized in that, remote monitoring platform carries out Web transmission by Internet network and field application platform, scene
Application platform is connected by RS485 with photovoltaic plant terminal device, is connected to form between photovoltaic plant terminal device by RS485
BACnet/MSTP networks；Field application platform is used to receive the failure of photovoltaic plant terminal device, event, alert data or looked into
Equipment running status, statistical information etc. are ask, remote monitoring platform is received or inquired about as defined in this standard by field application platform
Data or information.
A kind of 2. photovoltaic power station monitoring system according to claim 1, it is characterised in that photovoltaic plant terminal device it is hard
Part control section is by the periphery such as DSP Processor and man-machine interface, MSTP network interface cards, Data collecting conversion module and RS485 modules
Equipment forms, and its annexation is：DSP Processor respectively with man-machine interface, MSTP network interface cards, Data collecting conversion module, RS485
Module is connected；DSP Processor is connected by MSTP network interface cards with BACnet/MSTP networks；DSP Processor passes through Data collecting conversion
Module is connected with collecting transmitter；DSP Processor is connected by RS485 modules with inverter control plate.
3. a kind of photovoltaic power station monitoring system according to claim 1, it is characterised in that the data link layer of system uses
BACnet/MSTP networks, the network are transmitted the access control of medium using token mechanism, there was only a home site in system
Hold token, information and instruction can just be sent to other websites by only holding the home site of token, and other websites only receive
With the function of monitoring, the instruction of response could be only performed when responding home site；Wherein website obtains the time-out time of response
It is provided with according to system, when website obtains response in response time-out time, or reaches response time-out time, just token is pressed
Site address order transmission.
4. a kind of photovoltaic power station monitoring system according to claim 3, it is characterised in that set by a photovoltaic plant terminal
Standby and field application platform respectively forms the home site of a BACnet/MSTP network, and each photovoltaic plant terminal device and scene should
With BACnet/MSTP networks are formed between platform, operate under ad-hoc mode.
5. a kind of photovoltaic power station monitoring system according to claim 3, it is characterised in that support home site to be accessed across route.
A kind of 6. photovoltaic power station monitoring system according to claim 1, it is characterised in that photovoltaic plant terminal device it is hard
Part control section includes：Total activation module, control algolithm module, object management module, protocol conversion module and communication module；Institute
The coordinated scheduling that total activation module is completed between initialization and each module to each module is stated to work；The control algolithm module is complete
Into the logic control of photovoltaic plant terminal device, the judgement and operation to object currency are realized；The object management module is complete
Paired photovoltaic plant terminal device all BACnet object property definitions, initialization, maintenance and renewals；The protocol conversion module
Complete to provide protocol format from information such as the running status of photovoltaic plant terminal device, failure, event, alarms to BACnet standards
Conversion；The communication module is completed between each photovoltaic plant terminal device, photovoltaic plant terminal device and field application platform
Between communication.
7. a kind of photovoltaic plant monitoring method, it is applied to photovoltaic power station monitoring system as claimed in claim 1, and its feature exists
In its monitoring method is as follows：
Step 1：System starts, into init state；
Step 2：By the human-computer interface module of each photovoltaic plant terminal device, the object instance attribute of each equipment is carried out
Parameter configuration；The attribute of some of which object instance can be configured after example generation in object management module,
It can be determined when generating example；Each photovoltaic plant terminal device is added in BACnet/MSTP network token logic boxs,
Run under ad-hoc mode；
Step 3：Application platform, the backstage of remote monitoring platform configure photovoltaic electric according to customized information and form at the scene
Stand the information of terminal device, and formed and associated with the photovoltaic plant terminal device of step 2；
Step 4：Photovoltaic plant terminal device gathers photovoltaic plant real time status information and key equipment parameter, by inverter control
The data such as the DC voltage of plate, DC current, alternating voltage, the temperature parameter of alternating current and environment, irradiation parameters pass through
Man-machine interface, shown in the form of the data output of BACnet standards；
Step 5：When photovoltaic plant terminal device receives inquiry or during control instruction, according to the instruction corresponding information-package into
Data frame format, the website for holding token is sent to, and by holding the website of token, according to the control algolithm of system corresponding
Information is sent to other websites, and each website performs corresponding work, and refreshes the currency of object properties, for remote monitoring
Platform is inquired about and control, finally realizes the effective monitoring to system；
Step 6：The time for holding token when website does not obtain response in response time-out time, or is not reaching to response time-out
Time, then 4 are gone to step, token is otherwise transmitted to next website, and go to step 4.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113608957A (en) * | 2021-07-02 | 2021-11-05 | 南瑞集团有限公司 | Hydropower station control software fault on-line monitoring method and system |
| CN115776525A (en) * | 2022-11-16 | 2023-03-10 | 湖南绿道节能环保科技有限公司 | Photovoltaic data acquisition system and acquisition method |
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