CN219041467U - Distributed photovoltaic system - Google Patents

Abstract

The application discloses a distributed photovoltaic system, which comprises a photovoltaic acquisition device, a data processing device and an intelligent fusion terminal, wherein the photovoltaic acquisition device is used for acquiring data information of the distributed photovoltaic device and uploading the data information to the intelligent fusion terminal in a dual-mode communication mode; the distributed photovoltaic equipment is connected with the photovoltaic acquisition equipment through serial communication and is used for acquiring data information of a photovoltaic site and transmitting the data information to the photovoltaic acquisition equipment through a serial communication protocol; the intelligent fusion terminal is connected with the photovoltaic acquisition equipment through an alternating current power line and used for acquiring data information of the photovoltaic acquisition equipment in a dual-mode communication mode. The photovoltaic collection equipment of this application embodiment is small, portable and installation have characteristics such as communication rate is fast, data capacity is big, simultaneously, bimodulus communication has characteristics such as cycle is short, demand quantity is big. In this way, the data transmission of the distributed photovoltaic device can be made more efficient.

Description

Distributed photovoltaic system

Technical Field

The application relates to the technical field of communication, in particular to a distributed photovoltaic system.

Background

The distributed photovoltaic power generation is particularly constructed near a user site, and the operation mode is characterized in that the user side is self-powered, redundant electric quantity is used for surfing the internet, and balance adjustment is performed on a power distribution system. The distributed photovoltaic power generation particularly refers to a distributed power generation system which directly converts solar energy into electric energy by adopting a photovoltaic module. The novel comprehensive power generation and energy utilization mode with wide development prospect advocates the principles of nearby power generation, nearby grid connection, nearby conversion and nearby use, can effectively improve the generated energy of the photovoltaic power station with the same scale, and simultaneously effectively solves the problem of power loss in boosting and long-distance transportation. The most widely applied distributed photovoltaic power generation system is a photovoltaic power generation project built on the roof of an urban building. Such items must access the public power grid to supply power to nearby users along with the public power grid. Along with popularization of photovoltaic power generation, in order to achieve the aim of 'double carbon', a national power grid actively promotes construction of a novel power system, a power distribution network is transited from an original unidirectional transmission network to an active network with supply and demand interaction, a large number of distributed photovoltaics on a low-voltage side are continuously connected into the power distribution network, and how to achieve safe, intelligent, efficient and open consumption becomes an urgent challenge for development of the power distribution network.

At present, the operation state of the system can not be monitored and analyzed in real time only by collecting low-voltage distributed photovoltaic electric quantity. In order to realize distributed photovoltaic remote monitoring, a controllable expected effect can be detected, and data of the photovoltaic grid-connected inverter needs to be acquired. The conventional photovoltaic inverter is generally provided with an RS-485 communication serial port, because RS485 is a low-cost simple communication mode, the requirements on standardization of construction wiring are high, if a platform intelligent fusion terminal carries out remote communication with the photovoltaic inverter through an RS-485 long line, interference and communication faults are easy to generate due to irregular construction wiring, the construction difficulty is high, and the cost is high. Therefore, the data collection efficiency for the distributed photovoltaic device in the prior art is low.

Disclosure of Invention

An object of the embodiment of the application is to provide a distributed photovoltaic system, which is used for solving the problem of lower data acquisition efficiency of distributed photovoltaic equipment in the prior art.

To achieve the above object, the present application provides a distributed photovoltaic system, including:

the photovoltaic acquisition equipment is used for acquiring data information of the distributed photovoltaic equipment and uploading the data information to the intelligent fusion terminal in a dual-mode communication mode;

the distributed photovoltaic equipment is connected with the photovoltaic acquisition equipment through serial communication and is used for acquiring data information of a photovoltaic site and transmitting the data information to the photovoltaic acquisition equipment through a serial communication protocol;

the intelligent fusion terminal is connected with the photovoltaic acquisition equipment through an alternating current power line and used for acquiring data information of the photovoltaic acquisition equipment in a dual-mode communication mode.

In an embodiment of the present application, a photovoltaic collection apparatus includes:

the serial interface module is in communication connection with the distributed photovoltaic equipment through a serial port and is used for connecting the distributed photovoltaic equipment;

the photovoltaic state acquisition module is connected with the serial interface module and used for acquiring data information sent by the distributed photovoltaic equipment;

the main control module is connected with the photovoltaic state acquisition module and used for processing and controlling the data information;

and the communication module is connected with the main control module and the intelligent fusion terminal and is used for sending the data information sent by the main control module to the intelligent fusion terminal.

In an embodiment of the present application, the photovoltaic collection device further includes:

the position positioning module is connected with the main control module and used for acquiring the position information of the photovoltaic acquisition equipment and sending the position information to the main control module.

In an embodiment of the present application, the photovoltaic collection device further includes:

the power supply module is connected with the serial interface module, the photovoltaic state acquisition module, the main control module, the communication module and the position positioning module and is used for supplying power to the serial interface module, the photovoltaic state acquisition module, the main control module, the communication module and the position positioning module.

In the embodiment of the application, the distributed photovoltaic equipment is in communication connection with the photovoltaic acquisition equipment through an RS485 serial port.

In an embodiment of the present application, a distributed photovoltaic device includes:

the photovoltaic module is used for converting solar energy into electric energy;

the collecting box is connected with the photovoltaic module and the photovoltaic collecting equipment and is used for obtaining current after the photovoltaic module collects current and sending the running state of the collecting box to the photovoltaic collecting equipment;

and the inverter is respectively connected with the combiner box and the photovoltaic collection equipment and is used for converting direct current of the photovoltaic assembly into alternating current and sending the inversion rate and state of the inverter to the photovoltaic collection equipment.

In an embodiment of the present application, the distributed photovoltaic system further includes:

the intelligent circuit breaker is respectively connected with the inverter and the photovoltaic acquisition equipment, and is used for switching off or switching on a circuit between the distributed photovoltaic equipment and the intelligent fusion terminal and sending the on-off state of the intelligent circuit breaker to the photovoltaic acquisition equipment;

the intelligent ammeter is connected with the intelligent circuit breaker, the photovoltaic acquisition equipment and the intelligent fusion terminal respectively and is used for monitoring the electric quantity of the circuit and sending the electric quantity to the photovoltaic acquisition equipment and the intelligent fusion terminal respectively.

In an embodiment of the present application, the distributed photovoltaic system further includes:

the environment detection equipment is connected with the photovoltaic acquisition equipment through serial communication and is used for acquiring environment data.

In an embodiment of the present application, the distributed photovoltaic system further includes:

and the cloud platform is communicated with the intelligent fusion terminal and is used for carrying out data interaction with the intelligent fusion terminal and the photovoltaic acquisition equipment.

In this embodiment of the present application, the cloud platform includes:

the power master station platform is communicated with the intelligent fusion terminal and is used for carrying out data interaction with the intelligent fusion terminal;

and the photovoltaic master station platform is respectively communicated with the electric power master station platform and the photovoltaic acquisition equipment and is used for carrying out data interaction with the electric power master station platform and the photovoltaic acquisition equipment.

Through the technical scheme, the distributed photovoltaic system comprises photovoltaic acquisition equipment, distributed photovoltaic equipment and an intelligent fusion terminal. The photovoltaic collection device is connected with the distributed photovoltaic device through serial port communication, and the photovoltaic collection device is connected with the intelligent fusion terminal through an alternating current power line. The distributed photovoltaic equipment is used for collecting data information of a photovoltaic field and sending the data information to the photovoltaic collection equipment through a serial port communication protocol; the photovoltaic acquisition equipment acquires data information of the distributed photovoltaic equipment, and the data information is uploaded to the intelligent fusion terminal in a dual-mode communication mode; the intelligent fusion terminal acquires data information of the photovoltaic acquisition equipment in a dual-mode communication mode. According to the method, the photovoltaic collection device is in serial communication connection with the distributed photovoltaic device, data of the distributed photovoltaic device can be collected, the photovoltaic collection device and the intelligent fusion terminal are in dual-mode communication, and information interaction can be carried out with the intelligent fusion terminal. The photovoltaic collection equipment is small in size, convenient to carry and install, compared with the traditional narrow-band power carrier equipment, has the characteristics of high communication speed, large data capacity and the like, can support data collection of distributed photovoltaic equipment, and the serial port communication collection data is anti-attenuation, so that the centralized collection of tens of photovoltaic equipment or even hundreds of photovoltaic equipment in a relatively sealed area can be realized, the principle is simple, auxiliary accessories are cheap, and meanwhile, the dual-mode communication has the characteristics of short period, large demand quantity and the like. In this way, the data transmission of the distributed photovoltaic device can be made more efficient.

Additional features and advantages of embodiments of the present application will be set forth in the detailed description that follows.

Drawings

The accompanying drawings are included to provide a further understanding of embodiments of the present application and are incorporated in and constitute a part of this specification, illustrate embodiments of the present application and together with the description serve to explain, without limitation, the embodiments of the present application. In the drawings:

FIG. 1 schematically illustrates a block diagram of a distributed photovoltaic system according to an embodiment of the present application;

FIG. 2 schematically illustrates a block diagram of a distributed photovoltaic system according to another embodiment of the present application;

fig. 3 schematically shows a block diagram of a photovoltaic collection apparatus according to an embodiment of the present application.

Description of the reference numerals

100. Photovoltaic collection device 200 distributed photovoltaic device

300. Intelligent fusion terminal 400 cloud platform

201. Photovoltaic module 202 collection flow box

203. Intelligent circuit breaker of inverter 500

600. Intelligent ammeter 700 environment detection equipment

401. Power master station platform 402 photovoltaic master station platform

101. Photovoltaic state acquisition module of serial interface module 102

103. Communication module of main control module 104

105. Position locating module 106 power supply module

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it should be understood that the specific implementations described herein are only for illustrating and explaining the embodiments of the present application, and are not intended to limit the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present application based on the embodiments herein.

It should be noted that, in the embodiment of the present application, directional indications (such as up, down, left, right, front, and rear … …) are referred to, and the directional indications are merely used to explain the relative positional relationship, movement conditions, and the like between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present application, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be regarded as not exist and not within the protection scope of the present application.

Fig. 1 schematically illustrates a block diagram of a distributed photovoltaic system according to an embodiment of the present application. As shown in fig. 1, in an embodiment of the present application, a distributed photovoltaic system is provided, which may include:

the photovoltaic collection device 100 is configured to obtain data information of the distributed photovoltaic device, and upload the data information to the intelligent fusion terminal in a dual-mode communication manner;

the distributed photovoltaic equipment 200 is in communication connection with the photovoltaic collection equipment 100 through a serial port and is used for collecting data information of a photovoltaic field and sending the data information to the photovoltaic collection equipment 100 through a serial port communication protocol;

the intelligent fusion terminal 300 is connected with the photovoltaic collection device 100 through an alternating current power line and is used for obtaining data information of the photovoltaic collection device 100 through a dual-mode communication mode.

In order to realize distributed photovoltaic remote monitoring, a considerable and controllable expected effect is required to be acquired by the photovoltaic grid-connected inverter. If the intelligent fusion terminal 300 of the transformer area carries out remote communication with the photovoltaic inverter through a serial port communication long line, such as an RS-485 long line, interference and communication faults are easy to generate due to irregular construction wiring, so that the construction difficulty is high and the cost is high. In order to solve the problem, the embodiment of the application provides a photovoltaic collection device 100, where the photovoltaic collection device 100 is connected with a distributed photovoltaic device 200 through serial communication, and the photovoltaic collection device 100 is connected with an intelligent fusion terminal 300 through an ac power line, so that data collection of a distributed photovoltaic site can be realized. Preferably, in the embodiment of the present application, the distributed photovoltaic device 200 and the photovoltaic collection device 100 may be connected through an RS485 serial port. The distributed photovoltaic system 200 and the intelligent fusion terminal 300 can be connected through High-speed power line carrier communication (High-speedPowerline Communication, HPLC) and High-speed micro-power wireless communication (High-speedRadio Frequency, HRF) dual mode communication.

In the embodiment of the present application, the photovoltaic collection device 100 may collect the data information of the distributed photovoltaic device 200 through serial communication. Among other things, the distributed photovoltaic apparatus 200 may include, but is not limited to, photovoltaic modules, junction boxes, inverters, and the like. The photovoltaic collection device 100 collects data of devices such as a photovoltaic grid-connected inverter and a combiner box in a photovoltaic power station through a downlink serial port communication, such as an RS485 communication protocol, and uploads the data information to the intelligent fusion terminal 300 through dual-mode communication, such as HPLC or HRF. The photovoltaic collection device 100 can collect voltage, current, power information and the like of grid connection of a photovoltaic customer, and has protection functions of anti-islanding, overvoltage, overcurrent and the like. And then, the information interaction is carried out with the intelligent fusion terminal 300 of the platform region in a dual-mode communication mode, and the data information is uploaded to the intelligent fusion terminal 300. Further, the intelligent fusion terminal 300 can upload data to the internet cloud platform for distributing electric energy, so as to realize a solution of a minute data acquisition function. According to the embodiment of the application, after the data of the distributed photovoltaic equipment 200 are converged through serial port communication by the photovoltaic acquisition equipment 100, the data are converted into dual-mode communication and are transmitted to the intelligent fusion terminal 300, the advantages of dual-mode communication zero wiring, long transmission distance and high economy are fully exerted, and the service data stream of 'the intelligent fusion terminal HPLC to RS485 transmission module-distributed photovoltaic inverter' in a platform area is realized. The HPLC-RS 485 transparent transmission module can realize throughput and protocol conversion of protocols of nonstandard photovoltaic inverter protocols, and finally realize dynamic collection, control and adjustment of the low-voltage distributed photovoltaic running state by the platform region, so that the ideal working effect of the distributed photovoltaic platform region is achieved.

According to the embodiment of the application, the photovoltaic collection device 100 is in serial communication connection with the distributed photovoltaic device 200, data of the distributed photovoltaic device 200 can be collected, double-mode communication is carried out between the photovoltaic collection device 200 and the intelligent fusion terminal 300, and information interaction can be carried out between the photovoltaic collection device 200 and the intelligent fusion terminal 300. The photovoltaic collection device 100 is small in size, convenient to carry and install, and compared with the traditional narrow-band power carrier device, has the characteristics of high communication speed, large data capacity and the like, can support data collection of the distributed photovoltaic device 200, and can realize centralized collection of tens or even hundreds of photovoltaic devices in a relatively sealed area through serial port communication collection data attenuation resistance, and meanwhile, has the characteristics of short period, large demand quantity and the like. In this way, the data transmission of the distributed photovoltaic apparatus 200 may be made more efficient.

As shown in fig. 1, the distributed photovoltaic system may further include:

the cloud platform 400 is in communication with the intelligent fusion terminal 300 and is used for carrying out data interaction with the intelligent fusion terminal 300 and the photovoltaic collection device 100.

In particular, the distributed photovoltaic system may also include a cloud platform 400 in communication with the intelligent fusion terminal 300. The method is used for carrying out information interaction with the intelligent fusion terminal 300 so as to realize the scheme of HPLC dual-mode communication, platform area intelligent fusion terminal and cloud platform. The distributed photovoltaic system of the embodiment of the application is based on a platform area intelligent fusion terminal, photovoltaic monitoring, island prevention, metering and power quality multifunctional. The photovoltaic collection device 100 can acquire low-voltage photovoltaic customer electrical quantity data in real time, realize the functions of monitoring the low-voltage photovoltaic power generation state in the transformer area, optimizing the power quality of the transformer area, preventing island and the like, and upload distributed photovoltaic operation data to a distribution network production control system, namely a cloud platform. The cloud platform side can display event information such as solar energy generation capacity of the photovoltaic inverter, island operation of the inverter, island prevention action of a fusion terminal, reactive compensation start and exit of the inverter, and the like, so that the photovoltaic operation is controllable, controllable and in-control, and is a novel sharp tool for distributed photovoltaic power generation construction application.

Fig. 2 schematically illustrates a block diagram of a distributed photovoltaic system according to another embodiment of the present application. In another embodiment of the present application, a distributed photovoltaic device may include:

a photovoltaic module 201 for converting solar energy into electrical energy;

the junction box 202 is connected with the photovoltaic module 201 and the photovoltaic collection device 100, and is used for obtaining current after the photovoltaic module 201 is converged and sending the running state of the junction box 202 to the photovoltaic collection device 100;

an inverter 203 is connected to the junction box 202 and the photovoltaic collection device 100, respectively, for converting direct current of the photovoltaic module 201 into alternating current, and transmitting an inversion rate and status of the inverter 203 to the photovoltaic collection device 100.

Specifically, the distributed photovoltaic apparatus may include a photovoltaic module 201, a junction box 202, and an inverter 203. The photovoltaic module 201 is used for converting solar energy into electric energy, the junction box 202 is connected with the photovoltaic module 201 and used for obtaining current after the photovoltaic module 201 is junction, and the junction box 202 can be further connected with the photovoltaic collection device 100 and used for sending the operation state of the junction box 202 to the photovoltaic collection device 100. The inverter 203 is connected to the junction box 202 and the photovoltaic collection device 100, respectively, for converting the direct current of the photovoltaic module 201 into alternating current, and the inversion rate and state of the inverter 203 are transmitted to the photovoltaic collection device 100. Therefore, the photovoltaic collection apparatus 100 can acquire data of the junction box 202 in addition to the data of the inverter 203. Wherein, collection box 202 and inverter 203 are all connected with photovoltaic collection device 100 through serial communication.

As shown in fig. 2, the distributed photovoltaic system may further include:

the intelligent circuit breaker 500 is respectively connected with the inverter 203 and the photovoltaic collection device 100, and is used for switching off or switching on a circuit between the distributed photovoltaic device 200 and the intelligent fusion terminal 300, and sending the on-off state of the intelligent circuit breaker 500 to the photovoltaic collection device 100;

the intelligent ammeter 600 is respectively connected with the intelligent circuit breaker 500, the photovoltaic collection device 100 and the intelligent fusion terminal 300, and is used for monitoring the electric quantity of the circuit and respectively sending the electric quantity to the photovoltaic collection device 100 and the intelligent fusion terminal 300.

In particular, the distributed photovoltaic system may further include a smart breaker 500 and a smart meter 600. The intelligent circuit breaker 500 is disposed between the inverter 203 and the intelligent ammeter 600, and is in communication connection with the photovoltaic collection device 100 through a serial port, and is used for cutting off or switching on a circuit between the distributed photovoltaic device 200 and the intelligent fusion terminal 300, and can send the on-off state of the intelligent circuit breaker 500 itself to the photovoltaic collection device 100. The intelligent fusion terminal 300 can also control the on-off of the intelligent circuit breaker 500 through the photovoltaic collection device 100. For example, when the photovoltaic collection device 100 detects that the voltage exceeds 10%, the harmonic exceeds 0.05% or the three-phase imbalance exceeds 30%, the intelligent fusion terminal 300 can send an instruction through the photovoltaic collection device 100, remotely disconnect the client demarcation circuit breaker at the first time, and realize the coordinated control of the source network charge storage of the transformer area, and the power of different transformer areas mutually supply each other. Particularly, in the power failure maintenance work of the power distribution network, the photovoltaic on-line breaker can be remotely controlled, the reverse power transmission risk is firmly controlled in the whole process, and the safe and reliable operation of a large power grid is fundamentally ensured. The photovoltaic collection apparatus 100 can detect real-time operation data and operation curves of outgoing lines, switching on and off of various branch lines and switches of photovoltaic clients, current, voltage and the like of each photovoltaic platform area in real time. When the voltage of the grid-connected point exceeds 10% of the rated voltage, the system actively sends out an alarm prompt. By monitoring, the distributed photovoltaic clients with the access voltage exceeding 260 volts for a long time are brought into the management of the power distribution network active operation and inspection work orders, and the power supply personnel actively visit the clients when informing the clients, so that the green grid connection is realized. The smart meter 600 is disposed between the smart breaker and the intelligent fusion terminal 300, and is in communication with the smart breaker 500 through serial port or bluetooth, and is in communication connection with the photovoltaic collection device 100 through serial port, for monitoring the electric quantity of the circuit, and transmitting the electric quantity to the photovoltaic collection device 100 and the intelligent fusion terminal 300.

As shown in fig. 2, in an embodiment of the present application, the distributed photovoltaic system may further include:

the environment detection device 700 is connected with the photovoltaic collection device 100 through serial communication and is used for collecting environment data.

Specifically, the environment detection device 700 is in communication connection with the photovoltaic collection device 100 through a serial port, for example, through RS485 connection, the photovoltaic collection device 100 can be provided with a sensor simulation measurement interface such as a wind speed sensor, a temperature sensor, a radiation sensor and the like, and environmental information such as temperature, humidity sensor, wind direction sensor and the like around the photovoltaic power station is collected in real time, and each environmental operation is mastered in time, so that safe operation of the power station is ensured.

As shown in fig. 2, the cloud platform may include:

the power master station platform 401 is in communication with the intelligent fusion terminal 300 and is used for carrying out data interaction with the intelligent fusion terminal 300;

and the photovoltaic master station platform 402 is respectively communicated with the electric power master station platform 401 and the photovoltaic acquisition equipment 100 and is used for carrying out data interaction with the electric power master station platform 401 and the photovoltaic acquisition equipment 100.

In this embodiment, cloud platform can include electric power main website platform 401 and photovoltaic main website platform 402, and electric power main website platform 401 and intelligent fusion terminal 300 communication, photovoltaic main website platform 402 and photovoltaic acquisition device 100 communication, photovoltaic main website platform 402 and electric power main website platform 401 cloud butt joint. The power master platform 401 and the intelligent fusion terminal 300 may communicate through a fourth generation mobile communication technology (the 4th generation mobile communication technology, 4G) and are used for performing information interaction with the intelligent fusion terminal 300, for example, receiving data sent by the intelligent fusion terminal 300, sending an instruction to the intelligent fusion terminal 300, and the like. The photovoltaic host platform 402 may communicate with the photovoltaic collection device 100 over 4G or narrowband internet of things (Narrow Band Internet of Things, NB-IoT) for data interaction with the photovoltaic collection device 100. The cloud platform side can display event information such as solar energy generation capacity of the photovoltaic inverter, island operation of the inverter, island prevention action of a fusion terminal, reactive compensation start and exit of the inverter, and the like, so that the photovoltaic operation is controllable, controllable and in-control, and is a novel sharp tool for distributed photovoltaic power generation construction application.

Fig. 3 schematically shows a block diagram of a photovoltaic collection apparatus according to an embodiment of the present application. As shown in fig. 3, in an embodiment of the present application, the photovoltaic collection apparatus 100 may include:

the serial interface module 101 is in serial communication connection with the distributed photovoltaic equipment 200 and is used for connecting the distributed photovoltaic equipment 200;

the photovoltaic state acquisition module 102 is connected with the serial interface module 101 and is used for acquiring data information sent by the distributed photovoltaic equipment 200;

the main control module 103 is connected with the photovoltaic state acquisition module 102 and is used for processing and controlling data information;

and the communication module 104 is connected with the main control module 103 and the intelligent fusion terminal 300 and is used for sending the data information sent by the main control module 103 to the intelligent fusion terminal 300.

Specifically, the photovoltaic collection device 100 may be connected in serial communication with the distributed photovoltaic device 200 through the serial interface module 101. For example, the photovoltaic collection device 100 may be connected to the distributed photovoltaic device 200 via RS485, with an intermediate plug. The collector II type power line and the RS-485 line group are made of polyvinyl chloride insulated electronic wires, withstand voltage of 300V and temperature of 80 ℃. The plug-in structure parts of the power line and the RS-485 line group of the photovoltaic acquisition equipment 100 can be divided into two parts, namely a male part and a female part, wherein the female part is directly connected with the inside of the collector, and the length L=15 cm of the lead line; the Male part is connected with a power supply and an electric energy meter, the length of a lead wire is L=50cm, and a power supply wire and an RS-485 wire adopt wire noses. Serial port baud rate supports 9600bit/s, 2400bit/s, even check, 8 bit data bit, 1 bit stop bit, communication protocol supports DL/T645-2007 multifunctional electric energy meter communication protocol and DL/T698.45-201 x electric energy information acquisition and management System 4-5 parts: object-oriented interoperability data exchange protocols. The photovoltaic collection device 100 can receive the collection command issued by the terminal and report the collected data to the intelligent fusion terminal 300, the device adopts an RS485 interface to monitor the state of remote communication switching value, and is used for collecting the state of output empty contact points such as a direct current breaker, a lightning protection device and the like, and the RS485 interface adopts a Modbus RTU communication protocol.

The photovoltaic state acquisition module 102 is connected with the serial interface module 101, and is used for acquiring data information sent by the distributed photovoltaic device 200 through the serial interface module 101. The photovoltaic collection device 100 can be used for collecting voltage, current and power information of grid connection of a distributed photovoltaic customer with an intelligent circuit breaker, and has protection functions of anti-islanding, overvoltage, overcurrent and the like. Information interaction is carried out with the intelligent fusion terminal 300 of the platform region through HPLC, HRF and 4G, NB-Iot modes, and data are uploaded and matched with the electric energy Internet cloud platform 400, so that a minute-level data acquisition function is realized. The photovoltaic data collection device 100 is connected with the inverter 203, has various grid-connected and off-grid inverter protocols in the market, is communicated with the inverter and the controller, and can collect and monitor input and output power, generating capacity, input and output voltage and current, inversion efficiency and state, faults and alarm information.

The photovoltaic state acquisition module 102 can also be used for monitoring the running state of the battery plate, measuring the string current, acquiring the lightning protection device state and the direct current breaker state in the combiner box, uploading the measured and acquired data and the equipment state through RS485, and is used for monitoring the running state of the battery plate in the photocell array in real time and judging the abnormal string in real time on line.

In the embodiment of the application, the photovoltaic collection device 100 realizes a bidirectional metering function by collecting the forward and reverse electric metrics of the ammeter, and analyzes and uploads the electric energy quality in real time by collecting the voltage and the temperature of the battery plate, the state of the circuit breaker, the fault state of the lightning protection device and the tripping state of the circuit breaker in real time. The photovoltaic collection device 100 is also provided with an analog quantity measurement interface of sensors such as a wind speed, a temperature and an irradiation instrument, and the like, and is used for collecting information such as the ambient temperature, the humidity and the wind direction of the photovoltaic power station in real time, grasping the operation of each link in time and ensuring the safe operation of the power station. The collection chip of the photovoltaic collection device 100 uses ATT7022E, ATT7022E/26E/28E series multifunctional high-precision three-phase electric energy special metering chip, is suitable for three-phase three-wire and three-phase four-wire application, ATT7022E/26E/28E integrates a plurality of second-order sigma-delta ADC, a reference voltage circuit and circuits for digital signal processing of all power, energy, effective value, power factor and frequency measurement, and the like, can measure the active power, reactive power, apparent power, functional quantity and reactive energy of each phase and the combined phase, and can also measure parameters such as current, voltage effective value, power factor, phase angle, frequency and the like of each phase, and fully meets the collection requirement of the voltage and current of the photovoltaic collection device.

In this embodiment, the main control module 103 is connected to the photovoltaic state acquisition module 102, and is used for processing and controlling data information. The photovoltaic state acquisition module 102 acquires detection data, and the main control module 103 controls the intelligent circuit breaker 500 through the intelligent fusion terminal to judge and alarm the fault state. For example, when the photovoltaic collection device 100 detects that the voltage exceeds 10%, the harmonic exceeds 0.05% or the three-phase imbalance exceeds 30%, the intelligent fusion terminal 300 can send an instruction through the photovoltaic collection device 100, remotely disconnect the client demarcation circuit breaker at the first time, and realize the coordinated control of the source network charge storage of the transformer area, and the power of different transformer areas mutually supply each other. Particularly, in the power failure maintenance work of the power distribution network, the photovoltaic on-line breaker can be remotely controlled, the reverse power transmission risk is firmly controlled in the whole process, and the safe and reliable operation of a large power grid is fundamentally ensured. The photovoltaic collection status collection module 102 can also detect real-time operation data and operation curves of outgoing lines, switching on and off of various branch lines and photovoltaic clients of each photovoltaic platform area, current, voltage and the like in real time. When the voltage of the grid-connected point exceeds 10% of the rated voltage, the system actively sends out an alarm prompt. By monitoring, the distributed photovoltaic clients with the access voltage exceeding 260 volts for a long time are brought into the management of the power distribution network active operation and inspection work orders, and the power supply personnel actively visit the clients when informing the clients, so that the green grid connection is realized.

In this embodiment of the present application, the communication module 104 is connected to the main control module 103 and the intelligent fusion terminal 300, and is configured to send data information sent by the main control module 103 to the intelligent fusion terminal 300. The communication module 104 has an in-station data communication function of a distributed photovoltaic station, has an HPLC and HRF dual-mode communication function, and comprises a data reading control function of a distributed household power station (photovoltaic grid-connected distribution box), a weather station and other monitoring intelligent terminals in the station. And the communication with various manufacturer measurement and control instruments is realized through a standard protocol library, and the real-time data and alarm information data uploading function of the equipment are acquired and processed. The photovoltaic data acquisition equipment 100 can communicate data with the intelligent fusion terminal of the platform region in real time through HPLC, HRF, 4G, NB-Iot and the like, so that the distributed photovoltaic can be considerable, measurable and controllable, and the cloud platform can be uploaded to realize data to the terminal equipment. The photovoltaic collection device 100 communicates with the intelligent fusion terminal through the communication module 104, so that the state of each device can be uploaded to the background or the cloud in real time, the running state of the device is monitored in real time, maintenance and management are convenient, and the photovoltaic collection device can be flexibly applied to places inconvenient to wire. In this embodiment of the present application, the data collection of the inverter 203 adopts a timed active reporting mode, firstly, the intelligent fusion terminal 300 of the district customizes the data content and the information such as the collection frequency and the collection time period to be collected, and sends the information to the photovoltaic collection device through parameters, the photovoltaic collection device performs the data collection of the photovoltaic inverter according to the set collection data content, collection frequency and collection time period, and packages the data to report, when the intelligent fusion terminal 300 of the district has a control command to issue, the inverter 203 has a communication task with a high event reporting priority, the photovoltaic collection device staggers the time to avoid the communication conflict situation.

As shown in fig. 3, the photovoltaic collection apparatus 100 may further include:

the position locating module 105 is connected with the main control module 103, and is used for collecting the position information of the photovoltaic collection device 100 and sending the position information to the main control module 103.

In the embodiment of the application, the position locating module 105 is connected with the main control module 103, the position locating module 105 adopts a 4G mode to acquire the position information of the acquisition equipment, and timely discovers and locates the photovoltaic module with abnormal running state. In one example, U9507C may be used, U9507C performs positioning service through GPS and Beidou, U9507C wireless module is a wireless terminal product suitable for FDD-LTE/TDD-LTE/TD-SCDMA/UMTS/EDGE/GPRS/GSM/EVDO/CDMA multiple network modes and GPS and Beidou positioning service, and under FDD-LTE and TDD-LTE networks, U9507C access speed can reach 150Mbps in downlink and 50Mbps in uplink. Under the condition that no LTE network coverage exists, U9507C can be accessed through 3G (TD-SCDMA/UMTS) and 2G (EDGE/GP RS/GSM), and through TD-SCDMA access, the speed can reach 4.2Mbps in the downlink and 2.2Mbps in the uplink; the UMTS is accessed, and the speed can reach 42.2Mbps in the downlink and 5.76Mbps in the uplink. EGDEclass12 accesses downlink rates up to 237kbps and uplink 118kbps. The access rate of GPRSclass10 can reach 85.6kbps. EVDO goes up to 1.8Mbps and goes down to 3.1Mbps. The GPS can support at least 44 channels, the tracking navigation receiving sensitivity reaches-153 dBm, the cold start time is less than or equal to 60S, the warm start time is less than or equal to 45S, and the hot start time is less than or equal to 15S. By positioning the photovoltaic collection device 100, the cloud platform can timely and accurately acquire the position information of the distributed photovoltaic module, so that fault rush repair and the like can be timely performed.

As shown in fig. 3, the photovoltaic collection apparatus 100 may further include:

the power supply module 106 is connected with the serial interface module 101, the photovoltaic state acquisition module 102, the main control module 103, the communication module 104 and the position positioning module 105, and is used for supplying power to the serial interface module 101, the photovoltaic state acquisition module 102, the main control module 103, the communication module 104 and the position positioning module 105.

In the embodiment of the present application, the power supply module 106 is configured to supply power to the serial interface module 101, the photovoltaic state acquisition module 102, the main control module 103, the communication module 104, and the position location module 105. The DC-DC can use an ETA2845 model or an ETA3406 model, the ETA2845 model is a wide-input-range, high-efficiency and high-frequency DC-DC buck switching regulator, and the DC-DC buck switching regulator can provide output current of up to 0.4A. The current mode PWM control converter has a fixed switching frequency of 700KHz, allowing the use of small external components such as ceramic input and output capacitors and small inductors. ETA3406 is a high-efficiency 1.5MHz buck DC-DC converter chip with output current up to 1.2A. The input voltage range of the chip ETA3406 is 2.6V to 5.5V, and the ETA3406 has extremely high energy conversion efficiency, extremely low static power consumption and larger output current by using the electrode, and can be widely applied to various equipment.

According to the embodiment of the application, the distributed photovoltaic system can realize the collection function of minute-level photovoltaic data, so that when the voltage-harmonic wave-three-phase imbalance exceeds a set value, the client demarcation circuit breaker can be remotely disconnected according to the collected data at the first time, the coordination control of the source network charge storage of the transformer area is realized, the power of different transformer areas mutually supply and mutually supply, and the safe and reliable operation of a large power grid is fundamentally ensured. The distributed photovoltaic system has an HPLC dual-mode communication function, has the functions of communicating with the intelligent fusion terminal and uploading data to the intelligent fusion terminal, and has the function of converting data of equipment such as photovoltaic grid-connected inverter data, a combiner box, a weather station, a smart electric meter and the like of a photovoltaic power station into HPLC after being converged by RS485 to be transmitted to the intelligent fusion terminal, so that the service data flow of 'the intelligent fusion terminal of a transformer area from HPLC to RS485 transmission module-distributed photovoltaic inverter' is realized. The photovoltaic acquisition equipment can acquire detection data, and the breaker is controlled through the terminal to judge and alarm the fault state.

The photovoltaic collection equipment of the embodiment of the application is small in size, low in cost, convenient to carry and install, is an important element of the ubiquitous power internet of things, has the characteristics of high communication rate, large data capacity and the like compared with traditional narrow-band power carrier equipment, can support development and application of functions such as distributed photovoltaic data collection, data high-frequency collection and electric energy quality analysis, and is important basic equipment of client-side ubiquitous power internet of things perception layer construction engineering. Compared with detection of an electric energy meter and an acquisition terminal, the detection of HPLC dual-mode communication has the characteristics of short period, large demand quantity and the like. The anti-attenuation function can be realized through RS485 data acquisition, the centralized acquisition of tens or even hundreds of photovoltaic controllers in a relatively sealed area can be realized through the advantage of RS485 communication, and the principle is simple and auxiliary accessories are cheap. In this way, the data transmission of the distributed photovoltaic apparatus 200 may be made more efficient.

It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises an element.

The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and changes may be made to the present application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc. which are within the spirit and principles of the present application are intended to be included within the scope of the claims of the present application.

Claims (10)

1. A distributed photovoltaic system, comprising:

the photovoltaic acquisition equipment is used for acquiring data information of the distributed photovoltaic equipment and uploading the data information to the intelligent fusion terminal in a dual-mode communication mode;

the distributed photovoltaic equipment is connected with the photovoltaic acquisition equipment through serial communication and is used for acquiring data information of a photovoltaic field and sending the data information to the photovoltaic acquisition equipment through a serial communication protocol;

the intelligent fusion terminal is connected with the photovoltaic acquisition equipment through an alternating current power line and is used for acquiring data information of the photovoltaic acquisition equipment in a dual-mode communication mode.

2. The distributed photovoltaic system of claim 1, wherein the photovoltaic collection device comprises:

the serial interface module is connected with the distributed photovoltaic equipment through serial port communication and is used for connecting the distributed photovoltaic equipment;

the photovoltaic state acquisition module is connected with the serial interface module and used for acquiring data information sent by the distributed photovoltaic equipment;

the main control module is connected with the photovoltaic state acquisition module and used for processing and controlling the data information;

and the communication module is connected with the main control module and the intelligent fusion terminal and is used for transmitting the data information transmitted by the main control module to the intelligent fusion terminal.

3. The distributed photovoltaic system of claim 2, wherein the photovoltaic collection device further comprises:

and the position positioning module is connected with the main control module and is used for acquiring the position information of the photovoltaic acquisition equipment and transmitting the position information to the main control module.

4. The distributed photovoltaic system of claim 3, wherein the photovoltaic collection device further comprises:

the power supply module is connected with the serial interface module, the photovoltaic state acquisition module, the main control module, the communication module and the position positioning module and is used for supplying power to the serial interface module, the photovoltaic state acquisition module, the main control module, the communication module and the position positioning module.

5. The distributed photovoltaic system of claim 1, wherein the distributed photovoltaic device is communicatively connected to the photovoltaic collection device via an RS485 serial port.

6. The distributed photovoltaic system of claim 1, wherein the distributed photovoltaic apparatus comprises:

the photovoltaic module is used for converting solar energy into electric energy;

the junction box is connected with the photovoltaic module and the photovoltaic collection equipment and is used for obtaining current after the photovoltaic module is converged and sending the running state of the junction box to the photovoltaic collection equipment;

and the inverter is respectively connected with the combiner box and the photovoltaic collection equipment and is used for converting direct current of the photovoltaic assembly into alternating current and sending the inversion rate and state of the inverter to the photovoltaic collection equipment.

7. The distributed photovoltaic system of claim 6, further comprising:

the intelligent circuit breaker is respectively connected with the inverter and the photovoltaic acquisition equipment, and is used for switching off or switching on a circuit between the distributed photovoltaic equipment and the intelligent fusion terminal and sending the on-off state of the intelligent circuit breaker to the photovoltaic acquisition equipment;

the intelligent ammeter is respectively connected with the intelligent circuit breaker, the photovoltaic acquisition equipment and the intelligent fusion terminal and is used for monitoring the electric quantity of the circuit and respectively transmitting the electric quantity to the photovoltaic acquisition equipment and the intelligent fusion terminal.

8. The distributed photovoltaic system of claim 1, further comprising:

and the environment detection equipment is connected with the photovoltaic acquisition equipment through serial port communication and is used for acquiring environment data.

9. The distributed photovoltaic system of claim 1, further comprising:

and the cloud platform is communicated with the intelligent fusion terminal and is used for carrying out data interaction with the intelligent fusion terminal and the photovoltaic acquisition equipment.

10. The distributed photovoltaic system of claim 9, wherein the cloud platform comprises:

the power master station platform is communicated with the intelligent fusion terminal and is used for carrying out data interaction with the intelligent fusion terminal;

and the photovoltaic master station platform is respectively communicated with the electric power master station platform and the photovoltaic acquisition equipment and is used for carrying out data interaction with the electric power master station platform and the photovoltaic acquisition equipment.

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