CN103809535A - Photovoltaic array monitoring device based on ZigBee technology - Google Patents
Photovoltaic array monitoring device based on ZigBee technology Download PDFInfo
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- CN103809535A CN103809535A CN201210447030.8A CN201210447030A CN103809535A CN 103809535 A CN103809535 A CN 103809535A CN 201210447030 A CN201210447030 A CN 201210447030A CN 103809535 A CN103809535 A CN 103809535A
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Abstract
The invention provides a photovoltaic array monitoring device based on the ZigBee technology, and belongs to the technical field of signal monitoring. The photovoltaic array monitoring device based on the ZigBee technology of the invention comprises a power supply module, a central microprocessor, a data acquisition module and a peripheral circuit, wherein the power supply module is electrically connected with the central microprocessor and the data acquisition module respectively, and the central microprocessor is electrically connected with the data acquisition module and the peripheral circuit respectively. Compared with the prior art, the photovoltaic array monitoring device based on the ZigBee technology has the following advantages: photovoltaic array monitoring by the use of a wireless sensor network has incomparable superiority; and the wireless sensor network can transmit data to a three-dimension space without the need for a conductor medium, thus saving manpower and maintenance cost.
Description
Technical field
The present invention proposes a kind of photovoltaic array monitoring technology based on ZigBee technology, belongs to signal monitoring technical field.
Background technology
Along with energy crisis is increasingly sharpened, photovoltaic industry technology has broad application prospects, and its monitoring technology becomes one of gordian technique of photovoltaic system application.Photovoltaic array consists of parallel connection the photovoltaic module being cascaded.In the course of the work, the local fault of standard rectangular cell panel can cause the decline of whole electric power system output voltage or power, directly affects system performance and operational efficiency.For guaranteeing that system normally moves, reply photovoltaic array carries out status monitoring.
At present, the monitoring method of photovoltaic array mainly contains direct method and indirect method.Direct method is directly to measure the voltage and current of every cell panel, with bussing technique, data is sent into computing machine and judges.There are a series of problems relevant with transmission path such as planning wiring, preset interface, wireline inspection, circuit dilatation in the method.Indirect method is the duty that the temperature difference by measuring battery judges battery, and the method can only be judged the source of trouble, can not intuitively react the variation of photovoltaic module voltage, electric current.
Summary of the invention
Technique effect of the present invention can overcome above-mentioned defect, and a kind of photovoltaic array monitoring device based on ZigBee technology is provided, and it has realized the Surveillance center's Real-time Collection to photovoltaic array parameter and monitoring of running status by wireless network and internet.
For achieving the above object, the present invention adopts following technical scheme: it comprises power module, central microprocessor, data acquisition module and peripheral circuit, power module is electrically connected with central microprocessor, data acquisition module respectively, and central microprocessor is electrically connected with data acquisition module, peripheral circuit respectively.
It is a trend of territory net (WPAN) development that ZigBee and Internet are merged, because an only LAN (Local Area Network) just of ZigBee, overlay area is limited.But ZigBee really can with existing mobile network, internet is connected with other communication networks, and many ZigBee LAN (Local Area Network) are interconnected into an entirety mutually, effectively solve blind area cover problem.A territory net such as ZigBee is connected to Internet and can overcomes them in the deficiency aspect " macroscopic view ", Internet can overcome its deficiency aspect " microcosmic " simultaneously.The fusion of ZigBee and wireless network, Internet is exactly in fact the mutual conversion between Zigbee protocol, wireless network protocol and ICP/IP protocol Software for Design.For applying of system, Uniting monitoring node is ZigBee router, and cluster head node is ZigBee telegon, and tool is full-function device.Entirely can be used for data acquisition, the networking and data relay, also can expand the control of peripherals for photovoltaic module.Simultaneously cluster head node is as a network equipment access point, for network set up, node adds with data processing etc., plays a part organizer.Aggregation node is general wireless communication module, as the same base station being connected with WAP.Be mainly used in data relay, play a part transponder.The wireless transmission limited bandwidth of ZigBee should reduce quantity of information mutual between node when design as far as possible, reduces the additional overhead that control information brings.
Central microprocessor adopts CC2430 model.Data acquisition module comprises bypass diode current sample module, photovoltaic module voltage sample module, photovoltaic module current sample module and sensor.Sensor comprises temperature sensor, humidity sensor and optical sensor.Peripheral circuit comprises impedance matching circuit, DLL (dynamic link library), LED indication, level transferring chip, USB interface, RS232 interface, crystal oscillator, restorer and antenna.
The present invention compared with prior art has the following advantages: utilize wireless sensor network to monitor and have unrivaled superiority photovoltaic array.Wireless sensor network transmits data to three dimensions, middle without conductive medium, saves manpower and maintenance cost.Self-organization of network and fault-tolerance are high, are easy to again arrange net.Monitoring Data is without artificial interference, and institute's data information that obtains is original is accurately conducive to the follow-up improvement of scientific research and system and optimization, has advantages of real-time, integrality.
Accompanying drawing explanation
Fig. 1 is modular structure schematic diagram of the present invention;
Fig. 2 is monitoring node workflow schematic diagram of the present invention;
Fig. 3 is cluster head node workflow schematic diagram of the present invention;
Fig. 4 is aggregation node workflow schematic diagram of the present invention.
Embodiment
As shown in Figure 1, photovoltaic array monitoring device based on ZigBee technology of the present invention comprises power module, central microprocessor, data acquisition module and peripheral circuit, power module is electrically connected with central microprocessor, data acquisition module respectively, and central microprocessor is electrically connected with data acquisition module, peripheral circuit respectively.
Central microprocessor adopts CC2430 model.Data acquisition module comprises bypass diode current sample module, photovoltaic module voltage sample module, photovoltaic module current sample module and sensor.Sensor comprises temperature sensor, humidity sensor and optical sensor.Peripheral circuit comprises impedance matching circuit, DLL (dynamic link library), LED indication, level transferring chip, USB interface, RS232 interface, crystal oscillator, restorer and antenna.
According to the demand of the requirement of system monitoring unit low cost, low-power consumption and Zigbee protocol external member, select the CC2430 of TI company as the process chip of monitoring node.CC2430 is a real System on Chip/SoC (SoC) CMOS solution.It is in conjunction with a high-performance 2.4GHz DSSS (direct sequence spread spectrum) radio-frequency (RF) transceiver core and small and exquisite efficient 8051 controllers of technical grade.Possess good wireless receiving sensitivity and powerful interference free performance.The current loss of 0.9 μ A only under park mode, under standby mode lower than the current loss of 0.6 μ A, receive and emission mode under current loss respectively lower than 27mA or 25mA.Meet and apply the requirement to low cost, low-power consumption take ZigBee as basic 2.4GHz ISM band.
Design bypass diode current sample module is the characteristic of blocking in order to study photovoltaic module, reduces the effect of battery mismatch.Photovoltaic module voltage, current sample module are responsible for the electric current and voltage numerical value of sampled light photovoltaic assembly, judge whether photovoltaic module breaks down.The sensors such as temperature, humidity, the illumination environmental data of being responsible for sampling, for system optimization and photovoltaic module adjustment provide Data support.
As shown in Figure 2, be monitoring node workflow.Complete after hardware initialization, first carry out scan channel, search wireless signal.Then set up neighbor table, carry out the energy scan of father node, select the more router of energy to send interconnection network signal as father node, attempt to add network.If add network failure will continue to attempt several times, the request of networking obtains, after the response of cluster head node, can waiting for adding of child node, thereby completing the establishment of whole ZigBee wireless network, enters network monitoring and waiting status.After successfully adding network, monitoring node periodically carries out data acquisition and packet (node ID, sampled data etc.) is sent to cluster head node.If sent unsuccessfully, continue to attempt, until send successfully or exceed regulation transmission times.Complete after above work, monitoring node will continue to enter network monitoring and waiting status.
As shown in Figure 3, be cluster head node workflow.Cluster head node need keep network state always.Complete after hardware initialization, first carry out scan channel, broadcast after PAN ID is set, then receive the request of networking, distribution network address, responds the request of networking.After completing network construction, program redirect enters network monitoring and waiting status.When cluster head node is received after information, first judge whether information comes from a new node, the request if monitoring node networks, cluster head node goes out one of 16 short address Random assignment to new node previous calculations, send networking confirmation to it afterwards, connect.If not, cluster head node is waited for and is received the data that monitoring node sends.After data receiver success, carry out data processing, be sent to aggregation node.Complete after above work, cluster head node will continue to enter network monitoring and waiting status.
As shown in Figure 4, be aggregation node workflow.After aggregation node power-up initializing completes, enter network monitoring and waiting status, wait for the connection request of ZigBee equipment or the order that PC issues.When receiving after the connection request of certain equipment, be confirmed whether as validated user, if it is send the order that allows connection, realize the wireless connections of cluster head node and aggregation node.After connecting, aggregation node obtains data, and sends to Surveillance center after Data Integration is processed.Complete after above work, aggregation node will continue to enter network monitoring and waiting status.
The overall design philosophy of Surveillance center's terminal software is: set up scientific and reasonable database model, take out practicable solution.System possesses perfect human-computer interaction function and abundant information display function intuitively, as: parameter list, data sheet, warning picture etc., the demand of being close to the users.Realize the network management of monitoring system, management maintenance personnel, can read the data on server after authorizing, realize the remote monitoring of photovoltaic system, increase work efficiency and management level.Data are further analyzed to processing, for science decision and system optimization upgrading provides information support.
Claims (5)
1. the photovoltaic array monitoring device based on ZigBee technology, it is characterized in that, comprise power module, central microprocessor, data acquisition module and peripheral circuit, power module is electrically connected with central microprocessor, data acquisition module respectively, and central microprocessor is electrically connected with data acquisition module, peripheral circuit respectively.
2. the photovoltaic array monitoring device based on ZigBee technology according to claim 1, is characterized in that, central microprocessor adopts CC2430 model.
3. the photovoltaic array monitoring device based on ZigBee technology according to claim 2, is characterized in that, data acquisition module comprises bypass diode current sample module, photovoltaic module voltage sample module, photovoltaic module current sample module and sensor.
4. the photovoltaic array monitoring device based on ZigBee technology according to claim 3, is characterized in that, sensor comprises temperature sensor, humidity sensor and optical sensor.
5. the photovoltaic array monitoring device based on ZigBee technology according to claim 2, it is characterized in that, peripheral circuit comprises impedance matching circuit, DLL (dynamic link library), LED indication, level transferring chip, USB interface, RS232 interface, crystal oscillator, restorer and antenna.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105488991A (en) * | 2016-02-23 | 2016-04-13 | 国网上海市电力公司 | Data collector |
| CN105554111A (en) * | 2015-12-15 | 2016-05-04 | 中国电子科技集团公司第四十一研究所 | Modularized solar irradiance monitoring method based on Zigbee protocol |
| CN106448101A (en) * | 2016-09-09 | 2017-02-22 | 珠海格力电器股份有限公司 | Photovoltaic array monitoring system and method |
| CN107222168A (en) * | 2017-06-30 | 2017-09-29 | 安徽大恒能源科技有限公司 | Photovoltaic module monitoring method and its system based on 868MHz wireless telecommunications |
| CN107425878A (en) * | 2017-05-27 | 2017-12-01 | 南京泛和电力自动化有限公司 | Wireless communications method and wireless terminal for photovoltaic generation monitoring |
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| CN102148864A (en) * | 2011-01-28 | 2011-08-10 | 西安建筑科技大学 | Photovoltaic generation and large public building integration wireless monitoring system |
| CN102354004A (en) * | 2011-07-13 | 2012-02-15 | 中国科学院城市环境研究所 | Wireless sensor network technology-based method for monitoring array local wind environment |
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| CN101938142A (en) * | 2010-08-24 | 2011-01-05 | 浙江大学 | Desert synchronization photovoltaic power generating system with solar azimuth tracking device and tracking method thereof |
| CN102148864A (en) * | 2011-01-28 | 2011-08-10 | 西安建筑科技大学 | Photovoltaic generation and large public building integration wireless monitoring system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105554111A (en) * | 2015-12-15 | 2016-05-04 | 中国电子科技集团公司第四十一研究所 | Modularized solar irradiance monitoring method based on Zigbee protocol |
| CN105488991A (en) * | 2016-02-23 | 2016-04-13 | 国网上海市电力公司 | Data collector |
| CN106448101A (en) * | 2016-09-09 | 2017-02-22 | 珠海格力电器股份有限公司 | Photovoltaic array monitoring system and method |
| CN107425878A (en) * | 2017-05-27 | 2017-12-01 | 南京泛和电力自动化有限公司 | Wireless communications method and wireless terminal for photovoltaic generation monitoring |
| CN107425878B (en) * | 2017-05-27 | 2020-02-18 | 夏德华 | Wireless communication method and wireless terminal for photovoltaic power generation monitoring |
| CN107222168A (en) * | 2017-06-30 | 2017-09-29 | 安徽大恒能源科技有限公司 | Photovoltaic module monitoring method and its system based on 868MHz wireless telecommunications |
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Application publication date: 20140521 |