CN115473493A - Photovoltaic system and method for operating same - Google Patents

Photovoltaic system and method for operating same Download PDF

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Publication number
CN115473493A
CN115473493A CN202110650146.0A CN202110650146A CN115473493A CN 115473493 A CN115473493 A CN 115473493A CN 202110650146 A CN202110650146 A CN 202110650146A CN 115473493 A CN115473493 A CN 115473493A
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CN
China
Prior art keywords
photovoltaic system
photovoltaic
main line
main controller
sensing device
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110650146.0A
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Chinese (zh)
Inventor
许涛
徐洁
夏正月
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canadian Solar Inc
CSI Cells Co Ltd
Canadian Solar Manufacturing Changshu Inc
Original Assignee
CSI Cells Co Ltd
Canadian Solar Manufacturing Changshu Inc
Atlas Sunshine Power Group Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by CSI Cells Co Ltd, Canadian Solar Manufacturing Changshu Inc, Atlas Sunshine Power Group Co Ltd filed Critical CSI Cells Co Ltd
Priority to CN202110650146.0A priority Critical patent/CN115473493A/en
Publication of CN115473493A publication Critical patent/CN115473493A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S50/00—Monitoring or testing of PV systems, e.g. load balancing or fault identification
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00—Details of emergency protective circuit arrangements
    • H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00—Details of emergency protective circuit arrangements
    • H02H1/0092—Details of emergency protective circuit arrangements concerning the data processing means, e.g. expert systems, neural networks
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
    • H02H5/12—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to undesired approach to, or touching of, live parts by living beings
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/10—Photovoltaic [PV]

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  • Engineering & Computer Science (AREA)
  • Artificial Intelligence (AREA)
  • Evolutionary Computation (AREA)
  • Photovoltaic Devices (AREA)

Abstract

The invention provides a photovoltaic system and an operation method thereof, wherein the photovoltaic system comprises: the photovoltaic system also comprises a sensing device used for monitoring the operation environment of the photovoltaic system, and the sensing device is in communication connection with the main controller so that the main controller controls the operation state of the photovoltaic system according to the monitoring result of the sensing device. Compared with the prior art, the photovoltaic system monitoring system can automatically monitor the operating environment of the photovoltaic system, and can send a turn-off signal or stop sending an allowable operating signal by the main controller when monitoring abnormal conditions, so that the electric shock risk caused by misoperation of non-professionals is avoided, and meanwhile, double insurance of manual operation and automatic operation can be realized under emergency conditions.

Description

Photovoltaic system and method for operating same
Technical Field
The invention relates to the field of solar components, in particular to a photovoltaic system and an operation method thereof.
Background
With the gradual popularization of distributed photovoltaic power stations, the distributed photovoltaic power stations become important components of photovoltaic systems in the future, and photovoltaic modules are widely installed on roofs of civil houses, industrial plants, markets and the like.
The photovoltaic module can produce very high fatal voltage under the illumination condition, and this will bring serious threat to the installation of photovoltaic power plant, maintenance and the work of putting out a fire. How to ensure that emergency personnel are not shocked by the high voltage of the component array in the field treatment becomes a problem to be solved urgently.
At present, most power stations can only realize the function of switching off a main inverter end, which can only cut off the current in the power station, but the power station still has high voltage, and the voltage of a general distributed array is more than 400V, so that the danger that emergency personnel are shocked by high voltage can be caused. The us NEC 2017-Article 690.12 requires that photovoltaic circuits on or in buildings need to have a fast shut-off function to reduce the shock hazard for emergency response personnel. At present, the mainstream of developed countries such as europe and america is to configure a micro inverter to control the electrical output of each component, but the cost of the scheme is higher and is against the large background of the price-balancing internet access.
In view of the above, it is necessary to provide a photovoltaic system and a method for operating the same to solve the above problems.
Disclosure of Invention
The invention aims to provide a low-cost and safe photovoltaic system. The photovoltaic system can cut off a circuit in the photovoltaic system at any time, so that the maximum output voltage of the photovoltaic system is reduced to the human body safety voltage, and constructors are prevented from being shocked by high voltage electricity.
To achieve the above object, the present invention provides a photovoltaic system, comprising: the photovoltaic system comprises a photovoltaic module, a local manager, a main controller and an inverter, wherein the inverter is electrically connected with the photovoltaic module through a main line, one end of the local manager is connected with the photovoltaic module, and the other end of the local manager is connected to the main line.
As a further improvement of the invention, the sensing device is an early warning sensor.
As a further improvement of the invention, the main controller controls the running state of the photovoltaic system by inquiring the monitoring result of the sensing device or receiving the signal sent by the sensing device.
As a further improvement of the present invention, the main controller controls the on/off of the photovoltaic module and the main line by sending a shutdown signal or stopping sending an operation permission signal to the local manager.
As a further improvement of the present invention, the local manager includes a signal receiving end connected to the main controller and a switch or a voltage regulator connected to the photovoltaic module, where the signal receiving end is configured to receive a signal sent by the main controller and control the connection or disconnection between the switch or the voltage regulator and the photovoltaic module according to the signal.
As a further improvement of the invention, the switch is connected in series with the photovoltaic module, and when the switch is closed, the photovoltaic module is normally connected with the main line; when the switch is opened, the photovoltaic module is disconnected from the main line.
As a further improvement of the invention, the switch is connected in parallel with the photovoltaic module, and when the switch is closed, the photovoltaic module is connected with the main line at a low voltage; when the switch is opened, the photovoltaic module is normally connected with the main line.
The invention also aims to provide a self-operation method of the photovoltaic system, which can automatically monitor the operation environment of the photovoltaic system and realize double insurance of manual operation and automatic operation in emergency.
In order to achieve the above object, the present invention provides an operation method of a photovoltaic system, which is applied to the above photovoltaic system, and the operation method of the photovoltaic system mainly includes the following steps:
the photovoltaic module is electrically connected with the main circuit;
monitoring the operating environment of the photovoltaic system by a sensing device;
and the main controller controls the running state of the photovoltaic system according to the monitoring result of the sensing device.
As a further improvement of the invention, the operating state of the photovoltaic system comprises: the photovoltaic module is normally connected with the main line, disconnected with the main line and connected with the main line at low voltage.
As a further improvement of the present invention, when the value monitored by the sensing device continuously or repeatedly exceeds a preset value within a predetermined time, it is determined that the operating environment of the photovoltaic system monitored by the sensing device is abnormal.
As a further improvement of the present invention, when the sensing device monitors that the operating environment of the photovoltaic system is abnormal, the main controller sends a shutdown signal or stops sending an operation permission signal to the local manager, and the local manager controls the photovoltaic module to be disconnected from the main line or to be connected with the main line at a low voltage.
As a further improvement of the present invention, the method for operating a photovoltaic system further comprises: the main controller is operated manually to control the running state of the photovoltaic system.
The invention has the beneficial effects that: according to the photovoltaic system and the operation method thereof, the sensing device is in communication connection with the main controller, so that the operation environment of the photovoltaic system can be automatically monitored by the sensing device, the main controller sends a turn-off signal or stops sending an operation permission signal when the sensing device monitors abnormality, the electric shock risk caused by misoperation of non-professionals is avoided, and in addition, double insurance of manual operation and automatic operation can be realized under emergency conditions.
Drawings
Fig. 1 is a schematic diagram of the structure of a photovoltaic system of the present invention.
Fig. 2 is a flow chart of a method of normal operation of a photovoltaic system of the present invention.
Fig. 3 is a flow chart of a method of abnormal operation of a photovoltaic system in accordance with the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and/or processing steps closely related to the aspects of the present invention are shown in the drawings, and other details not closely related to the present invention are omitted.
In addition, it is also to 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.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, the present invention discloses a photovoltaic system comprising: the photovoltaic system comprises a photovoltaic module, a local manager, a main controller and an inverter, wherein the inverter is electrically connected with the photovoltaic module through a main line, one end of the local manager is connected with the photovoltaic module, the other end of the local manager is connected to the main line, the local manager is in communication connection with the main controller to control the connection of the photovoltaic module and the main line, the photovoltaic system further comprises a sensing device used for monitoring the operation environment of the photovoltaic system, and the sensing device is in communication connection with the main controller so that the main controller can control the operation state of the photovoltaic system according to the monitoring result of the sensing device. The setting of sensing device not only can automatic monitoring photovoltaic system's operational environment, can directly send turn-off signal or directly stop sending when unusual and allow the operation signal moreover, avoid the electric shock risk that non-professional's maloperation arouses.
In a preferred embodiment of the present application, there are a plurality of photovoltaic modules, and a plurality of local managers are correspondingly provided, so that each photovoltaic module can be connected to and disconnected from the main line through the corresponding local manager. The main controller is provided with one and is arranged in the inverter to be used as a component or a function of the inverter, and each local manager is in communication connection with the main controller through a wireless network or a PLC (programmable logic controller) so as to receive signals sent by the main controller. The sensing device is arranged in the main controller and is in communication connection with the main controller through a wireless network or a PLC (programmable logic controller), so that the main controller controls the running state of the photovoltaic system according to the monitoring result of the sensing device. Of course, in other embodiments, the number of local managers may also be set to be less than the number of photovoltaic modules, and one local manager may be used to control the on/off of a plurality of photovoltaic modules, which is not limited herein. The main controller may also be separately disposed at any position of the photovoltaic system, and is not limited herein. The sensing device may also be disposed in the local manager, or in any location in the photovoltaic system, as long as it can be communicatively connected to the main controller, which is not limited herein.
The photovoltaic module comprises a photovoltaic laminating part and a frame positioned on the periphery of the photovoltaic laminating part, and the local manager is arranged on the photovoltaic module and is specifically positioned on the frame or the photovoltaic laminating part. Preferably, the local manager may be mechanically attached to the frame of the photovoltaic module, or may be adhered to the back sheet of the photovoltaic laminate, which is not limited herein.
Preferably, the sensing device is a pre-warning sensor. When the sensing device monitors that the environmental condition of the operation of the photovoltaic system is abnormal, an early warning signal is sent to the main controller, and the main controller controls the operation state of the photovoltaic system according to the monitoring result of the sensing device.
Further, the main controller controls the operation state of the photovoltaic system by inquiring the monitoring result of the sensing device or receiving the signal sent by the sensing device. Specifically, when the sensor device monitors that the environmental condition of the photovoltaic system is abnormal, the main controller can query the monitoring result or receive the early warning signal sent by the sensor device, and then send a turn-off signal or stop sending an operation permission signal to the local manager, so that the local manager controls the connection and disconnection of the photovoltaic module and the main line to control the operation state of the photovoltaic system.
Referring to fig. 2, the method for normal operation of the photovoltaic system of the present invention mainly includes the following steps: the method comprises the following steps that a main controller sends out an operation permission signal, a local manager receives the operation permission signal sent by the main controller and then starts up in a set time period, and a photovoltaic module can output normal voltage to an inverter; during non-set time periods (i.e., all time periods except the "set time period"), the local manager is turned off, so that the photovoltaic module is disconnected from the main line or the photovoltaic module is connected to the main line at a low voltage.
The above-described "set time period" may be set to: the local manager receives any one time point from T1 to T2 after the main controller sends out an operation permission signal; the "unset period" is set to: not between any of the time points T1 to T2 of the enable signal, where T2 is later than T1.
Of course, the number of the operation permission signals is not limited to one, and may be plural. When the number of the operation permission signals is multiple, the local manager is started between time points from T1 to T2 after receiving each operation permission signal sent by the main controller, so that the photovoltaic module outputs normal voltage to the inverter; and when the photovoltaic module is not between any time point T1 and T2 of the operation allowing signal, the local manager disconnects the photovoltaic module from the main line or reduces the output voltage of the photovoltaic module.
Through the arrangement, when the photovoltaic system operates normally, the photovoltaic module is directly switched on or off according to the existence of the operation allowing signal and a preset rule (such as a set time period) without judging whether the operation allowing signal skips some pulses, so that the judgment process is reduced, and the reliability and the safety are enhanced.
Referring to fig. 3, the operation method of the photovoltaic system when monitoring an abnormality of the present invention mainly includes the following steps: the photovoltaic module is electrically connected with the main circuit; monitoring the operating environment of the photovoltaic system by a sensing device; and the main controller controls the running state of the photovoltaic system according to the monitoring result of the sensing device.
Further, the operating state of the photovoltaic system in this application includes: the photovoltaic module is normally connected with the main line, disconnected with the main line and connected with the main line at low voltage. When the main controller sends out an operation permission signal, the local manager receives the operation permission signal sent out by the main controller in a set time period, the local manager is started, the photovoltaic module is connected to the main line, and at the moment, the operation state of the photovoltaic system is that the photovoltaic module is normally connected with the main line. When the sensing device monitors that the operating environment of the photovoltaic system is abnormal, the sensing device sends an abnormal signal to the main controller, or the main controller inquires the abnormal monitoring result, the main controller sends a turn-off signal or stops sending an operation allowing signal, so that the local manager is disconnected, the photovoltaic module is disconnected from the main line or the output voltage of the photovoltaic module is reduced, and at the moment, the operating state of the photovoltaic system is that the photovoltaic module is disconnected from the main line or the photovoltaic module is connected with the main line at a low voltage. Set sensing device and main control unit to the communication and be connected, not only can automatic monitoring photovoltaic system's operational environment, can directly send the turn-off signal or directly stop sending and allow the operating signal by main control unit when appearing unusual moreover, avoid the electric shock risk that non-professional's maloperation arouses.
Further, when the sensing device monitors that the abnormal state disappears, the sensing device may send a monitoring result to the main controller, or after the main controller queries that the abnormal state disappears, the main controller may continue to send an operation permission signal, and the local manager receives the operation permission signal sent by the main controller within a set time period (for example, between time points T1 and T2 after each operation permission signal sent by the main controller), and controls the photovoltaic module to be normally connected to the main line.
In this application, the monitoring of the operating environment abnormality of the photovoltaic system by the sensing device means: and when the value monitored by the sensing device continuously or repeatedly exceeds a preset value in preset time, judging that the operating environment of the photovoltaic system monitored by the sensing device is abnormal. The "predetermined time" and the "preset value" are not limited to specific values, and can be set according to specific actual conditions.
When the sensing device monitors that the operating environment of the photovoltaic system is abnormal, the main controller sends a turn-off signal or stops sending an operation permission signal to the local manager, and the local manager controls the photovoltaic module to be disconnected with the main line or the photovoltaic module to be connected with the main line at low voltage.
In particular, the sensing device may be a temperature sensor, a smoke sensor, a fire sensor, a voltage sensor, a current sensor or other warning sensor, which is not limited herein. The following will exemplify a temperature sensor.
When the temperature sensor monitors that the temperature around the operating environment of the photovoltaic system continuously or repeatedly exceeds a preset value (such as 200 ℃) within a preset time, the temperature sensor can judge that the temperature is abnormal. The "predetermined time" and the "preset value" are not limited to specific values, and can be set according to specific actual conditions.
When the temperature sensor tests that the temperature is abnormal, the temperature sensor can send a temperature abnormal signal to the main controller, the main controller sends a turn-off signal or stops sending an operation permission signal to the local manager, and the local manager controls the photovoltaic module to be disconnected with the main line or the photovoltaic module to be connected with the main line at low voltage. Of course, the main controller can also automatically query the monitoring result of the temperature sensor to judge whether the temperature sensor monitors abnormity or not, and then judge whether the running state of the photovoltaic system needs to be changed automatically or not, so that the photovoltaic module is disconnected from the main line or is connected with the main line at low voltage.
As one preferred embodiment of the present invention, the local manager includes a signal receiving end connected to the main controller and a switch connected to the signal receiving end, where the signal receiving end is configured to receive an operation-allowed signal or a shutdown signal sent by the main controller and control the switch to be turned on or off. When the signal receiving end receives the operation permission signal within a set time period (between time points T1 and T2), the switch is controlled to be closed or opened, so that the photovoltaic module is connected to the main line and outputs normal voltage to the inverter. When the signal receiving end receives the operation permission signal in the non-set time period (namely, between the non-T1 time point and the non-T2 time point), or the signal receiving end receives the turn-off signal or does not receive the operation permission signal, the switch is controlled to be opened or closed, so that the photovoltaic assembly is disconnected from the main line or is connected with the main line at low voltage.
Specifically, the switch and the photovoltaic module can be connected in series or in parallel. When the switch is connected with the photovoltaic module in series, if the signal receiving end receives an operation permission signal sent by the main controller within a set time period (between time points of T1 and T2), the switch is controlled to be closed, and at the moment, the photovoltaic module is normally connected with the main circuit and outputs normal voltage to the inverter. If the signal receiving end receives the operation-allowing signal in the non-set time period (namely, between the non-T1 and the non-T2 time points), or the signal receiving end receives the turn-off signal or cannot receive the operation-allowing signal, the control switch is turned on, and at the moment, the photovoltaic module is disconnected with the main line. When the switch is connected with the photovoltaic module in parallel, if the signal receiving end receives an operation permission signal sent by the main controller within a set time period (between time points of T1 and T2), the switch is controlled to be opened, and at the moment, the photovoltaic module is normally connected with the main circuit and can output normal voltage to the inverter. When the signal receiving end receives the operation permission signal in the non-set time period (namely, between the non-T1 time point and the non-T2 time point), or the signal receiving end receives the turn-off signal or cannot receive the operation permission signal, the control switch is closed, and at the moment, the photovoltaic module is connected with the main line at low voltage and outputs the low voltage to the inverter. Of course, the "low voltage" herein refers to a human body safety voltage, and the specific value is not limited as long as it can ensure that emergency response personnel are not shocked by a high voltage when handling emergency abnormal events.
As another preferred embodiment of the present invention, the switch in the above embodiment may be replaced with a voltage regulating device. When the signal receiving end receives an operation permission signal sent by the main controller within a set time period (between time points T1 and T2), the voltage regulating device is controlled to operate, the photovoltaic module is normally connected with the main line, and normal voltage is output to the inverter. When the signal receiving end receives the operation permission signal in the non-set time period (namely, between the non-T1 time point and the non-T2 time point) or the signal receiving end receives the turn-off signal or cannot receive the operation permission signal, the voltage regulating device is controlled to operate, the output voltage of the photovoltaic assembly is regulated, and the photovoltaic assembly is connected with the main line at low voltage so as to reduce the output voltage of the photovoltaic assembly. Preferably, the voltage regulating device is a DC/DC power converter.
With continued reference to fig. 3, the main controller may also stop sending the operation-allowing signal or sending the shutdown signal by human operation, such as: and manually switching off the main controller, so that the main controller stops sending an operation permission signal or sends a switching-off signal to the local manager, the local manager is switched off, and the photovoltaic module is disconnected from the main line or is connected with the main line at low voltage.
Or when the constructor handles an emergency abnormal event or the sensing device fails, the circuit in the photovoltaic system can be manually cut off or automatically cut off at any time, so that the maximum voltage output of the photovoltaic system is reduced to the human safety voltage, the constructor is ensured not to be shocked by high voltage electricity, and double insurance of manual operation and automatic operation is realized in an emergency.
In summary, according to the photovoltaic system and the operation method thereof of the present invention, the sensing device and the main manager are set to be in communication connection, so that not only can the operation environment of the photovoltaic system be automatically monitored, but also the main controller can directly send the shutdown signal or directly stop sending the operation permission signal when an abnormality occurs, so as to avoid the risk of electric shock caused by the misoperation of non-professionals, and in addition, double insurance of manual operation and automatic operation can be realized in an emergency.
Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the present invention.

Claims (12)

1. A photovoltaic system, comprising: the photovoltaic system comprises a photovoltaic module, a local manager, a main controller and an inverter, wherein the inverter is electrically connected with the photovoltaic module through a main line, one end of the local manager is connected with the photovoltaic module, and the other end of the local manager is connected to the main line.
2. The photovoltaic system of claim 1, wherein: the sensing device is an early warning sensor.
3. The photovoltaic system of claim 1, wherein: the main controller controls the running state of the photovoltaic system by inquiring the monitoring result of the sensing device or receiving the signal sent by the sensing device.
4. The photovoltaic system of claim 1, wherein: and the main controller sends a turn-off signal or stops sending an operation permission signal to the local manager, so that the local manager controls the on-off of the photovoltaic module and the main line.
5. The photovoltaic system of claim 1, wherein: the local manager comprises a signal receiving end connected with the main controller and a switch or a voltage regulating device connected with the photovoltaic assembly, wherein the signal receiving end is used for receiving a signal sent by the main controller and controlling the connection or disconnection between the switch or the voltage regulating device and the photovoltaic assembly according to the signal.
6. The photovoltaic system of claim 5, wherein: the switch is connected with the photovoltaic module in series, and when the switch is closed, the photovoltaic module is normally connected with the main line; when the switch is open, the photovoltaic module is disconnected from the main line.
7. The photovoltaic system of claim 5, wherein: the switch is connected with the photovoltaic module in parallel, and when the switch is closed, the photovoltaic module is connected with the main line at low voltage; when the switch is opened, the photovoltaic module is normally connected with the main line.
8. An operation method of a photovoltaic system, which is applied to the photovoltaic system of any one of claims 1 to 7, characterized in that the operation method of the photovoltaic system mainly comprises the following steps:
the photovoltaic module is electrically connected with the main circuit;
monitoring the operating environment of the photovoltaic system by a sensing device;
and the main controller controls the running state of the photovoltaic system according to the monitoring result of the sensing device.
9. The method of operating a photovoltaic system of claim 8, wherein the operating state of the photovoltaic system comprises: the photovoltaic module is normally connected with the main line, disconnected with the main line and connected with the main line at low voltage.
10. Method of operating a photovoltaic system according to claim 8, characterized in that: and when the value monitored by the sensing device continuously or repeatedly exceeds a preset value in a preset time, judging that the operating environment of the photovoltaic system monitored by the sensing device is abnormal.
11. Method of operating a photovoltaic system according to claim 10, characterized in that: when the sensing device monitors that the operating environment of the photovoltaic system is abnormal, the main controller sends a turn-off signal or stops sending an operation permission signal to the local manager, and the local manager controls the photovoltaic module to be disconnected with the main line or to be connected with the main line at low voltage.
12. Method of operating a photovoltaic system according to claim 8, characterized in that: the operation method of the photovoltaic system further comprises the following steps: the main controller is operated manually to control the running state of the photovoltaic system.
CN202110650146.0A 2021-06-10 2021-06-10 Photovoltaic system and method for operating same Pending CN115473493A (en)

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Application Number Priority Date Filing Date Title
CN202110650146.0A CN115473493A (en) 2021-06-10 2021-06-10 Photovoltaic system and method for operating same

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Application Number Priority Date Filing Date Title
CN202110650146.0A CN115473493A (en) 2021-06-10 2021-06-10 Photovoltaic system and method for operating same

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Publication Number Publication Date
CN115473493A true CN115473493A (en) 2022-12-13

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