CN210402688U - Photovoltaic power station wireless data acquisition system - Google Patents

Photovoltaic power station wireless data acquisition system Download PDF

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Publication number
CN210402688U
CN210402688U CN201921422380.2U CN201921422380U CN210402688U CN 210402688 U CN210402688 U CN 210402688U CN 201921422380 U CN201921422380 U CN 201921422380U CN 210402688 U CN210402688 U CN 210402688U
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photovoltaic
lora
data
power station
data collector
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CN201921422380.2U
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焦喜立
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WUXI SHANGDE YIJIA NEW ENERGY Co.,Ltd.
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Wuxi Shangde Yijia New Energy Co ltd
Wuxi Suntech Power Co Ltd
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Priority to CN201921422380.2U priority Critical patent/CN210402688U/en
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy

Abstract

The utility model provides a photovoltaic power station wireless data acquisition system, which comprises a photovoltaic data acquisition device and a plurality of LoRa acquisition terminals; the LoRa acquisition terminal is divided into a LoRa master machine and a LoRa slave machine; at a photovoltaic power station site of the distributed photovoltaic system, all photovoltaic inverters are connected in series through an RS485 bus and then connected to a photovoltaic data collector, and the photovoltaic data collector is connected with a LoRa host; at the other photovoltaic power station sites of the distributed photovoltaic system, all the photovoltaic inverters are connected in series through an RS485 bus and then connected to the LoRa slave machine; the LoRa master machine and each LoRa slave machine form a star-shaped wireless network; the photovoltaic data collector is provided with a wireless flow card and is connected with the Internet through GRPS/4G so as to be connected with the monitoring platform cloud server. The utility model discloses can practice thrift the cost to the asynchronous problem of data has been avoided.

Description

Photovoltaic power station wireless data acquisition system
Technical Field
The utility model relates to a data acquisition system, especially a photovoltaic power plant wireless data acquisition system.
Background
For a large-scale distributed photovoltaic system, the system is generally installed on a plurality of roofs, and in consideration of the difficulty in wiring among different roofs, photovoltaic equipment (mainly photovoltaic inverters) on the plurality of roofs are difficult to connect equipment communication interfaces in a wired mode; the traditional mode is that each roof is provided with an independent monitoring system, each monitoring system independently sends data to a server, and the more the number of roofs is, the more independent data monitoring systems (including a photovoltaic data collector and a wireless flow card) are needed;
at present, a monitoring scheme of a multi-roof distributed photovoltaic system is shown in a case of fig. 1, wherein 5 inverters on each roof are connected in series through an RS485 bus, and then a data line is connected to a photovoltaic data collector; the photovoltaic data collector is connected to the Internet through the GPRS/4G router, then uploads the data to a cloud server of the monitoring system through the Internet, and finally a user checks the monitored data through a local client, a remote client or a mobile client.
The current system has several disadvantages:
1. the number of photovoltaic data collectors is large, and the hardware cost is high;
2. the wireless traffic cards are large in number, and the data traffic cost is high (due to the fact that the distance is long, WiFi cannot be generally applied);
3. the data that photovoltaic data collection station uploaded the server is asynchronous leads to the customer end to show that the data is asynchronous, and the horizontal contrastive analysis of data is inconvenient to do.
Disclosure of Invention
To exist not enough among the prior art, the utility model provides a photovoltaic power plant wireless data acquisition system can assemble each photovoltaic inverter operational data of a plurality of photovoltaic power plant websites wireless to a photovoltaic data collection station on, then resend to monitor platform cloud ware, can practice thrift the cost to the asynchronous problem of data has been avoided. The utility model adopts the technical proposal that:
a wireless data acquisition system of a photovoltaic power station comprises a photovoltaic data acquisition device and a plurality of LoRa acquisition terminals; the LoRa acquisition terminal is divided into a LoRa master machine and a LoRa slave machine;
at a photovoltaic power station site of the distributed photovoltaic system, all photovoltaic inverters are connected in series through an RS485 bus and then connected to a photovoltaic data collector, and the photovoltaic data collector is connected with a LoRa host;
at the other photovoltaic power station sites of the distributed photovoltaic system, all the photovoltaic inverters are connected in series through an RS485 bus and then connected to the LoRa slave machine;
the LoRa master machine and each LoRa slave machine form a star-shaped wireless network;
the photovoltaic data collector is provided with a wireless flow card and is connected with the Internet through GRPS/4G so as to be connected with the monitoring platform cloud server.
Furthermore, 4-8 photovoltaic inverters are arranged on each photovoltaic power station.
Further, the communication distance of the LoRa acquisition terminal is 6 km-8 km.
Furthermore, the operation data of each photovoltaic inverter are temporarily stored in an internal memory of the photovoltaic data collector, and the photovoltaic data collector uploads the data to the monitoring platform server at the same time.
The utility model has the advantages that:
1) setting a photovoltaic data collector for one station, and optimizing the photovoltaic data collector to ensure that all stations share one photovoltaic data collector; and hardware cost of the photovoltaic data collector is reduced.
2) Data traffic costs may be reduced.
3) The synchronization of monitoring data of different sites is ensured.
Drawings
Fig. 1 is a schematic diagram of a data acquisition system in the prior art.
Fig. 2 is a schematic diagram of the data acquisition system of the present invention.
Fig. 3 is the utility model discloses a loRa terminal network deployment sketch map.
Detailed Description
The invention is further described with reference to the following specific drawings and examples.
As shown in fig. 2, the utility model provides a photovoltaic power station wireless data acquisition system mainly comprises a LoRa (long range Radio, a low power wide area network communication technology of the internet of things) acquisition terminal and a photovoltaic data acquisition unit;
the system comprises a photovoltaic data acquisition device and a plurality of LoRa acquisition terminals; the LoRa acquisition terminal is divided into a LoRa master machine and a LoRa slave machine;
at a photovoltaic power station site of the distributed photovoltaic system, all photovoltaic inverters are connected in series through an RS485 bus and then connected to a photovoltaic data collector, and the photovoltaic data collector is connected with a LoRa host;
at the other photovoltaic power station sites of the distributed photovoltaic system, all the photovoltaic inverters are connected in series through an RS485 bus and then connected to the LoRa slave machine;
the LoRa master machine and each LoRa slave machine form a star-shaped wireless network;
the photovoltaic data collector is provided with a wireless flow card and is connected with the Internet through GRPS/4G so as to be connected with the monitoring platform cloud server;
the LoRa host machine is used for connecting equipment in different physical positions together in a junction mode through the LoRa slave machine and uniformly connecting the equipment to one photovoltaic data collector, so that the number of the photovoltaic data collectors is reduced;
in fig. 2, the photovoltaic data collector of the roof 01 can collect the operating data of the photovoltaic inverters of all the roofs, so that only one wireless flow card needs to be opened, and compared with the case that a plurality of wireless flow cards are opened at the same time, a part of cost can be saved;
the operation data of all the photovoltaic inverters on the roof are temporarily stored in an internal memory of one photovoltaic data collector, and the photovoltaic data collector uploads the data to the monitoring platform server at the same time, so that the synchronization of all the data is ensured;
the LoRa acquisition terminal is a standard industrial product, is low in price and communication power consumption, does not need flow charge, and has the cost of about 1/10 of photovoltaic acquisition; the cost of installing one LoRa collection terminal per roof is very small.
The communication distance of the LoRa acquisition terminal is 6 km-8 km, and the requirement of the distributed photovoltaic system on the communication distance of multiple roofs is completely met.
Taking a project that a 1MW distributed photovoltaic system and photovoltaic inverters are installed on 8 roofs as an example, 7 photovoltaic data collectors can be reduced by adopting the data acquisition system, and each photovoltaic data collector can calculate 14000 yuan according to 2000 yuan.
In the above 1MW case, 7 LoRa slave machines and 1 LoRa host machine need to be added, and 8 LoRa acquisition terminals are added in total; each is calculated according to 200 yuan, and 1600 yuan is added.
The above 1MW case can save the hardware cost by 12400 yuan.
The 1MW case can save 7 wireless traffic cards, and the traffic cost can be saved by 7000 yuan per 1000 yuan per three years of traffic package.
The above 1MW case can save the total cost by 19400 RMB, about 0.02 RMB/W.
The more the number of stations of the photovoltaic project is, the more the cost is saved.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the examples, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the scope of the claims of the present invention.

Claims (4)

1. A photovoltaic power station wireless data acquisition system is characterized by comprising a photovoltaic data acquisition device and a plurality of LoRa acquisition terminals; the LoRa acquisition terminal is divided into a LoRa master machine and a LoRa slave machine;
at a photovoltaic power station site of the distributed photovoltaic system, all photovoltaic inverters are connected in series through an RS485 bus and then connected to a photovoltaic data collector, and the photovoltaic data collector is connected with a LoRa host;
at the other photovoltaic power station sites of the distributed photovoltaic system, all the photovoltaic inverters are connected in series through an RS485 bus and then connected to the LoRa slave machine;
the LoRa master machine and each LoRa slave machine form a star-shaped wireless network;
the photovoltaic data collector is provided with a wireless flow card and is connected with the Internet through GRPS/4G so as to be connected with the monitoring platform cloud server.
2. The photovoltaic plant wireless data acquisition system of claim 1,
and 4-8 photovoltaic inverters are arranged on each photovoltaic power station.
3. The photovoltaic plant wireless data acquisition system of claim 1,
the communication distance of the LoRa acquisition terminal is 6 km-8 km.
4. The photovoltaic plant wireless data acquisition system of claim 1,
the operation data of each photovoltaic inverter are temporarily stored in an internal memory of the photovoltaic data collector, and the photovoltaic data collector uploads the data to the monitoring platform server at the same time.
CN201921422380.2U 2019-08-29 2019-08-29 Photovoltaic power station wireless data acquisition system Active CN210402688U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201921422380.2U CN210402688U (en) 2019-08-29 2019-08-29 Photovoltaic power station wireless data acquisition system

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Application Number Priority Date Filing Date Title
CN201921422380.2U CN210402688U (en) 2019-08-29 2019-08-29 Photovoltaic power station wireless data acquisition system

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111525696A (en) * 2020-05-09 2020-08-11 安徽联维新能源科技有限公司 Distributed photovoltaic power station operation and maintenance monitoring system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111525696A (en) * 2020-05-09 2020-08-11 安徽联维新能源科技有限公司 Distributed photovoltaic power station operation and maintenance monitoring system

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Effective date of registration: 20200509

Address after: 214028 Jiangsu Province, Wuxi New District No. 9 Xinhua Road Wu

Patentee after: WUXI SHANGDE YIJIA NEW ENERGY Co.,Ltd.

Address before: 214028 Jiangsu Province, Wuxi New District No. 9 Xinhua Road Wu

Co-patentee before: WUXI SUNTECH POWER Co.,Ltd.

Patentee before: WUXI SHANGDE YIJIA NEW ENERGY Co.,Ltd.