CN202049598U - Wireless data transmission system for intelligent confluence box of photovoltaic power station - Google Patents

Wireless data transmission system for intelligent confluence box of photovoltaic power station Download PDF

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Publication number
CN202049598U
CN202049598U CN2011200988732U CN201120098873U CN202049598U CN 202049598 U CN202049598 U CN 202049598U CN 2011200988732 U CN2011200988732 U CN 2011200988732U CN 201120098873 U CN201120098873 U CN 201120098873U CN 202049598 U CN202049598 U CN 202049598U
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CN
China
Prior art keywords
slave
transmission system
described
wireless data
data transmission
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CN2011200988732U
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Chinese (zh)
Inventor
雷志奇
朱丹
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北京泰豪太阳能电源技术有限公司
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Publication of CN202049598U publication Critical patent/CN202049598U/en

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Abstract

The utility model relates to a wireless data transmission system for intelligent confluence box of a photovoltaic power station. The wireless data transmission system comprises a host and a plurality of slaves. The host comprises a control unit which is connected with a communication port and a wireless data transmission module respectively. The slave comprises another control unit which is connected with another wireless data transmission module matched with the wireless data transmission module in the host and a signal detecting unit respectively. The wireless data transmission system issues an order of data acquisition to each slave through the host; each slave performs the corresponding response according to the received order and uploads the collected data to the host; and then the data are uniformly uploaded through the host. In the wireless data transmission system, the wiring problem is not required to be considered in the process of installation, so that a great amount of communication cost can be saved. All slaves are mutually independent and uniformly controlled by the host without influencing each other. When one of the slaves breaks down, the other slaves are not affected; moreover, the broken-down machine can be easily positioned by the host.

Description

Photovoltaic plant intelligence header box data radio transmission system

Technical field

The utility model relates to a kind of photovoltaic plant intelligence header box data radio transmission system.

Background technology

Along with rapid development of economy, the consumption of China's energy also increases substantially, and China has become the regenerative resource of second largest in the world energy resource consumption state sun power as cleaning, more and more is subject to people's attention, and application also more and more widely.We generally are divided into photovoltaic system autonomous system, grid-connected system and commingled system.Application form, application scale, loadtype from system, carry out deep analysis as can be known from principle of work, the characteristics of system, the maximum characteristics of grid-connected system in the photovoltaic power supply system, the direct current that is exactly the photovoltaic array generation converts the direct afterwards access electricity network of the alternating current that meets the utility grid requirement to through combining inverter, PV electric power that square formation produces is except supplying with AC load in the grid-connected system, and unnecessary electric power feeds back to electrical network.At overcast and rainy or night, when the electric energy that photovoltaic array does not produce electric energy or generation can not satisfy loading demand just by mains supply.This system can walk abreast usually and use civil power and solar photovoltaic assembly array as the power supply of local AC load, reduced the load short of electricity rate of total system, and the PV system that is incorporated into the power networks can play the peak regulation effect to utility network.In addition,, exempt the configuration accumulator, saved the process of batteries to store energy and release, reduced the loss of energy thereby can make full use of PV square formation electricity power, and reduced the cost of system because grid-connected system is directly imported electrical network with electric energy.So the large-scale and superhuge power station of being incorporated into the power networks is the important development direction of the following regenerative resource in countries in the world.

In grid-connected photovoltaic system,, can insert the photovoltaic header box in order to reduce the line between solar photovoltaic assembly and the inverter.We can be together in series the photovoltaic module of some, form photovoltaic tandem one by one, and then with several photovoltaic tandems photovoltaic header box that inserts in parallel.For reliability and the practicality that improves system, we can dispose lightning protection device in the photovoltaic header box, fuse and isolating switch etc., and monitor the duty of each crosstalk pond assembly at any time, make the power station operate in optimum condition.Here it is our said pv grid-connected plant intelligence header box.

The intelligent header box of main flow all adopts the communication mode of RS485, and subject matter has communication wires cost height, and the construction trouble consumes manpower, financial resources in a large number.Simultaneously, this communication mode of RS485 short-circuit conditions occurs in case a machine breaks down, and whole communication system just enters state of paralysis, if system is bigger, this fault is not easy to get rid of.And the mode of RS485 communication is along with the increase of slave quantity, signal phase mutual interference between each equipment, and the reliability of communication declines to a great extent.

The utility model content

The utility model has overcome above-mentioned shortcoming, and the photovoltaic plant intelligence header box that a kind of communications cost is low, reliability is high data radio transmission system is provided.

The technical scheme in the invention for solving the technical problem is: a kind of photovoltaic plant intelligence header box data radio transmission system, comprise a main frame and a plurality of slave, described main frame comprises a control module, described control module is connected with communication port and wireless data transmission module respectively, described slave comprises another control module, the control module of described slave be connected with respectively with main frame in wireless data transmission module another wireless data transmission module, the detecting signal unit that are complementary.

Described main frame also can comprise a LED working station indicator that is connected with the control module of described main frame.

Described detecting signal unit can comprise Hall current sensor and the voltage detecting electric current that is connected by the voltage detecting port.

Described slave also can comprise a storage unit that is connected with the control module of described slave.

Described slave also can comprise a mode selection switch that is connected with the control module of described slave.

Described slave also can comprise another LED working station indicator that is connected with the control module of described slave.

Described slave also can comprise a clock unit that is connected with the control module of described slave.

Described slave also can comprise another communication port that is connected with the control module of described slave.

Described storage unit can adopt the SD card.

The wireless data transmission module of described main frame and slave can adopt the RF905 module that is complementary.

The utility model sends the order of image data respectively to each slave by main frame, each slave is made corresponding response according to the order of receiving, and the data that collect are uploaded to main frame by wireless mode, upload by the main frame unification again, the utility model need not be considered wiring problem in installation process, save a large amount of communications costs, and, separate between each slave, be independent of each other, unified by host computer control, in case wherein one break down, can not influence other slave work, and main frame is easy to navigate to the machine that breaks down.Therefore, the utility model effectively reduces header box communication aspects difficulty of construction, saves the manpower financial capacity, and system stability is reliable.

Description of drawings

Fig. 1 is an one-piece construction synoptic diagram of the present utility model;

Fig. 2 is the theory diagram of main frame in the utility model;

Fig. 3 is the workflow diagram of main frame in the utility model;

Fig. 4 is the theory diagram of slave in the utility model;

Fig. 5 is the workflow diagram of slave in the utility model.

Embodiment

As shown in fig. 1, the utility model is by a main frame and Duo Tai slave machine, and wherein main frame is connected with host computer by wired mode (for example RS232 bus), and described host computer can be embedded systems such as data acquisition unit, can also be computer.Main frame is connected by rf wireless signal with slave, and is separate between each slave, is independent of each other.The groundwork process of system is, host computer sends order to described main frame by the RS232 port, main frame is issued corresponding slave by wireless data transmission module with order, the slave that receives orders is according to command context, make and replying, by wireless data transmission module data are returned main frame, main frame is passed to host computer to these data again.Introduce in detail with regard to the structure and the course of work of main frame and slave respectively below.

Described main frame as shown in Figure 2, comprise a control module that constitutes by single chip computer AT MEGA32, described control module is connected with communication port, wireless data transmission module and LED working station indicator respectively as the control core, described communication port is RS485 or RS232 port, wherein, communication port is used for communicating by letter with host computer, LED working station indicator indication main frame current working state, described wireless data transmission module is used for communicating by letter with slave, and described main frame is the bridge that connects slave and host computer.

As shown in Figure 3, workflow diagram for main frame, the work of main frame is determined by host computer fully, after system's power-up initializing, main frame begins the order of waiting for that host computer transmits, the order of host computer has 3 kinds: configuration order, networking commands and data acquisition command (specifically pass which kind of order and operate the upper computer software decision by the user).Corresponding reaction is made in the order that main frame is different according to host computer.

Described slave as shown in Figure 4, comprise the control module that constitutes by another single-chip microcomputer, the control module of described slave as kernel control chip be connected with respectively with main frame in wireless data transmission module another wireless data transmission module, detecting signal unit, storage unit, mode selection switch, LED working station indicator, clock unit, the communication port that are complementary.Described clock unit provides correct time for slave, the LED working station indicator is used to indicate the slave current working state, described wireless data transmission module is used for and main-machine communication, described mode selection switch can adopt toggle switch, be used for selecting the mode of operation of slave, described storage unit can adopt the SD card, be used for storing the front-end detection data, loss of data during communication failure, described detecting signal unit comprises Hall current sensor and the voltage detecting electric current that is connected by the voltage detecting port, wherein, utilize 8 Hall current sensors, can monitor 8 tunnel (deciding) input current respectively on the battery component number, voltage detecting circuit is used for detecting voltage, and by the control module of voltage detecting port transmission to described slave, described communication port also can adopt RS232 or RS485 port, be used for connecting computer, the computer expert crosses described communication port slave is configured.The main effect of slave is according to the order image data of main frame and uploads data.

As shown in Figure 5, be the slave workflow diagram, each slave all needed before connecting system by the host computer configuration, mainly was that its address is configured (being equivalent to give a name or number), to be different from other slaves.After the configuration successful, slave can connecting system.At this moment, all slaves are taken orders from main frame fully, enter the wait command state, after a certain slave receives Host Command, make corresponding answer according to different orders.

The data procedures that described slave is gathered is specific as follows:

The data of described slave collection comprise 8 road electric currents of each input channel, 1 road voltage, and circuit-breaker status in original intelligent header box and lightning protection device status data.Described Hall element is input as current signal, is output as voltage signal, and this voltage signal is input to AD (analog to digital conversion) input port of single-chip microcomputer, becomes digital quantity (pack together launch through wireless module with other data) after single-chip microcomputer is handled; The voltage acquisition process is that input voltage is direct current 400V-1000V, becomes 0-5V voltage behind electric resistance partial pressure, is converted to digital quantity by single-chip microcomputer equally; Circuit-breaker status and lightning protection device state are switching value (0 and 1, for example isolating switch is opened for 0, and closure is 1, and lightning protection device normally is 0, and inefficacy is 1).Single-chip microcomputer can be launched through the RF905 wireless module above-mentioned packing data of once gathering to together, finishes uploading of a secondary data.

No matter main frame or slave, its control module all can adopt spi bus to communicate by letter with wireless data transmission module.Described wireless data transmission module can adopt the RF905 module, and its technical parameter is as follows:

1) the open ISM band of 433Mhz is exempted from licence;

2) high workload speed 50kbps, efficient GFSK modulation, antijamming capability is strong, is particularly suitable for the Industry Control occasion;

3) 125 channels satisfy multiple spot and frequency hopping communications needs;

4) built in hardware CRC error detection and point-to-multipoint delivery address control;

5) low-power consumption, 1.9V-3.6V work, state is 2.5uA under the standby mode;

6) transceiver mode switching time is 650us;

7) but module software is established the address, only receive that this machine address just understands output data, can directly connect single-chip microcomputer and use.

The communication protocol of described main frame and slave, adopt between main frame and the slave one main many from class MODBUS agreement, also be host broadcast when sending order, comprise slave addresses in the broadcasting, when certain slave is found this address and self matching addresses, make corresponding answer according to order.Any one constantly has only a machine to be in emission state at most, the crowded case of collision of channel can not occur.

More than photovoltaic plant provided by the utility model intelligence header box data radio transmission system is described in detail, used specific case herein principle of the present utility model and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present utility model and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present utility model, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as restriction of the present utility model.

Claims (10)

1. photovoltaic plant intelligence header box data radio transmission system, it is characterized in that: comprise a main frame and a plurality of slave, described main frame comprises a control module, described control module is connected with communication port and wireless data transmission module respectively, described slave comprises another control module, the control module of described slave be connected with respectively with main frame in wireless data transmission module another wireless data transmission module, the detecting signal unit that are complementary.
2. photovoltaic plant intelligence header box data radio transmission system according to claim 1, it is characterized in that: described main frame also comprises a LED working station indicator that is connected with the control module of described main frame.
3. photovoltaic plant intelligence header box data radio transmission system according to claim 1, it is characterized in that: described detecting signal unit comprises Hall current sensor and the voltage detecting electric current that is connected by the voltage detecting port.
4. photovoltaic plant intelligence header box data radio transmission system according to claim 1, it is characterized in that: described slave also comprises a storage unit that is connected with the control module of described slave.
5. photovoltaic plant intelligence header box data radio transmission system according to claim 1, it is characterized in that: described slave also comprises a mode selection switch that is connected with the control module of described slave.
6. photovoltaic plant intelligence header box data radio transmission system according to claim 1, it is characterized in that: described slave also comprises another LED working station indicator that is connected with the control module of described slave.
7. photovoltaic plant intelligence header box data radio transmission system according to claim 1, it is characterized in that: described slave also comprises a clock unit that is connected with the control module of described slave.
8. photovoltaic plant intelligence header box data radio transmission system according to claim 1, it is characterized in that: described slave also comprises another communication port that is connected with the control module of described slave.
9. photovoltaic plant intelligence header box data radio transmission system according to claim 4, it is characterized in that: described storage unit adopts the SD card.
10. photovoltaic plant intelligence header box data radio transmission system according to claim 1, it is characterized in that: the wireless data transmission module of described main frame and slave adopts the RF905 module that is complementary.
CN2011200988732U 2011-04-07 2011-04-07 Wireless data transmission system for intelligent confluence box of photovoltaic power station CN202049598U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103292839A (en) * 2012-12-27 2013-09-11 北京唯绿建筑节能科技有限公司 Solar photovoltaic power generation monitoring system with communication function
CN103309286A (en) * 2012-03-06 2013-09-18 北京联动天翼科技有限公司 Device and method for realizing communication cascade of multiple lithium battery groups

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103309286A (en) * 2012-03-06 2013-09-18 北京联动天翼科技有限公司 Device and method for realizing communication cascade of multiple lithium battery groups
CN103309286B (en) * 2012-03-06 2016-02-24 北京联动天翼科技有限公司 A kind of application is used for the implementation method for organizing lithium battery group communication cascade of the implement device of many group lithium battery group communication cascade more
CN103292839A (en) * 2012-12-27 2013-09-11 北京唯绿建筑节能科技有限公司 Solar photovoltaic power generation monitoring system with communication function

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