CN215222138U - Photovoltaic system - Google Patents
Photovoltaic system Download PDFInfo
- Publication number
- CN215222138U CN215222138U CN202121300380.2U CN202121300380U CN215222138U CN 215222138 U CN215222138 U CN 215222138U CN 202121300380 U CN202121300380 U CN 202121300380U CN 215222138 U CN215222138 U CN 215222138U
- Authority
- CN
- China
- Prior art keywords
- photovoltaic module
- photovoltaic
- local manager
- sensing device
- photovoltaic system
- Prior art date
- 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.)
- Active
Links
- 230000002159 abnormal effect Effects 0.000 claims abstract description 15
- 238000012544 monitoring process Methods 0.000 claims abstract description 10
- 238000004891 communication Methods 0.000 claims abstract description 9
- 230000001105 regulatory effect Effects 0.000 claims description 8
- 230000005856 abnormality Effects 0.000 claims description 6
- 230000001276 controlling effect Effects 0.000 claims description 4
- 239000000779 smoke Substances 0.000 claims description 3
- 230000006872 improvement Effects 0.000 description 11
- 238000000034 method Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 7
- 230000008569 process Effects 0.000 description 5
- 206010014357 Electric shock Diseases 0.000 description 4
- 230000009471 action Effects 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 238000003475 lamination Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
Images
Classifications
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Landscapes
- Photovoltaic Devices (AREA)
Abstract
The utility model provides a photovoltaic system, including photovoltaic module, local manager, main control unit and dc-to-ac converter, the dc-to-ac converter passes through main line electric connection with photovoltaic module, the one end and the photovoltaic module of local manager are connected, the other end is connected to the main line, switch on or turn-off between with control photovoltaic module and the dc-to-ac converter, photovoltaic system still includes sensing device, local manager is connected with main control unit and sensing device communication respectively, so that local manager when receiving turn-off command or sensing device monitoring anomaly that main control unit sent, control photovoltaic module breaks off or reduces photovoltaic module's output voltage on the main line. Compared with the prior art, the utility model discloses a photovoltaic system can be when constructor handles emergent abnormal event, cut off the circuit in the system at any time for photovoltaic system's maximum output voltage reduces to human safe voltage, ensures that constructor is not by the high-voltage electric shock.
Description
Technical Field
The utility model relates to a photovoltaic system belongs to photovoltaic technical field.
Background
As distributed photovoltaic becomes more popular, the requirements for distributed safety regulations are also increasingly refined, such as: when the roof is installed with components, abnormal detection of the components, emergencies such as fire and the like occur and emergency personnel need to handle the components on site, how to ensure that the high-voltage electric shock of the component array is not generated is a problem which needs to be solved urgently.
At present, most power stations can only realize the shutdown function of a main inverter end, but the power stations can only cut off the current in the power stations, the high voltage still exists in the power stations, and the voltage of a general distributed array is larger than 400V, so that the danger that emergency personnel are shocked by the high voltage is caused. The us NEC 2017-Article 690.12 requires that photovoltaic circuits on or in buildings need to be equipped with a fast shut-off function to reduce the risk of electric shock to emergency personnel. At present, the mainstream of developed countries such as europe and the united states is to configure a micro inverter to control the electrical output of each component, but the scheme has high cost and runs counter to the large background of price-balancing internet surfing.
In view of the above, there is a need for improvements to existing photovoltaic systems to address the above problems.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a photovoltaic system, this photovoltaic system can cut off the circuit in the system at any time for photovoltaic system's maximum output voltage reduces to human safe voltage, ensures that constructor is not by the high-voltage electric shock.
In order to achieve the above object, the utility model provides a photovoltaic system, including photovoltaic module, local manager, main control unit and dc-to-ac converter, the dc-to-ac converter passes through main line electric connection with photovoltaic module, the one end and the photovoltaic module of local manager are connected to, the other end is connected to the main line to switch on or turn-off between control photovoltaic module and the dc-to-ac converter, photovoltaic system still includes sensing device, local manager respectively with main control unit with sensing device communication is connected, so that local manager is receiving the turn-off instruction that main control unit sent perhaps sensing device monitors when unusual, controls photovoltaic module breaks off or reduces from the main line photovoltaic module's output voltage.
As a further improvement, the sensing device is an early warning sensor.
As a further improvement of the present invention, the sensing device is a temperature sensor, a smoke sensor, a fire sensor, a voltage sensor, or a current sensor.
As a further improvement of the present invention, the sensing device is used for sending an abnormal signal to the local manager when monitoring an abnormality, and the local manager controls the photovoltaic module to be disconnected or reduced from the main line to output voltage of the photovoltaic module.
As a further improvement, the local manager is further used for inquiring the monitoring result of the sensing device is judged according to the monitoring result whether the sensing device monitors abnormity or not.
As a further improvement of the present invention, the local manager is connected to the main controller through wireless network or PLC.
As a further improvement, the local manager includes the signal reception end of being connected with main control unit and the switch of being connected with the signal reception end, the signal reception end is used for receiving the turn-off instruction that main control unit sent and according to this turn-off instruction control the switch is closed or opened, makes photovoltaic module breaks off or reduces from the mainline photovoltaic module's output voltage.
As a further improvement of the present invention, the switch is connected in series with the photovoltaic module, and when the signal receiving terminal is controlled the switch is opened, the photovoltaic module is disconnected with the main line.
As a further improvement of the present invention, the switch is connected in parallel to the photovoltaic module, and when the signal receiving terminal controls the switch is closed, the photovoltaic module outputs a low voltage to the inverter.
As a further improvement, the local manager includes the signal reception end of being connected with main control unit and the voltage regulation device of being connected with the signal reception end, the signal reception end is used for receiving the turn-off instruction that main control unit sent and according to this turn-off instruction control voltage regulation device operation, make photovoltaic module breaks off or reduces from the mainline photovoltaic module's output voltage.
As a further improvement of the present invention, the voltage regulating device is a DC/DC power converter.
The utility model has the advantages that: the utility model discloses a photovoltaic system utilizes the communication between sensing device and the local manager to be connected for the local manager receives the turn-off instruction that main control unit sent or when sensing device monitors unusually, can control photovoltaic module and break off or reduce photovoltaic module's output voltage on following the mainline, makes photovoltaic system's maximum output voltage reduce to human safe voltage, ensures that constructor is not by the high-voltage electric shock.
Drawings
Fig. 1 is a first structural schematic diagram of the photovoltaic system of the present invention.
Fig. 2 is a relational diagram of the operation signal and the on-off state of the photovoltaic module in the present invention.
Fig. 3 is a waveform diagram of a first on-off state of the photovoltaic module after the master controller in fig. 1 sends out an operation permission signal.
Fig. 4 is a waveform diagram of a second on-off state of the photovoltaic module after the master controller in fig. 1 sends out an operation permission signal.
Fig. 5 is a flow chart of a method of operating the photovoltaic system shown in fig. 1.
Fig. 6 is a second structural schematic diagram of the photovoltaic system of the present invention.
Fig. 7 is a flow chart of a method of operating the photovoltaic system shown in fig. 6.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, the utility model discloses a photovoltaic system, including photovoltaic module, local manager, main control unit and dc-to-ac converter, wherein, the dc-to-ac converter passes through main line electric connection with photovoltaic module, and the one end and the photovoltaic module of local manager are connected, the other end is connected to the main line to switch on or turn-off between convenient control photovoltaic module and the dc-to-ac converter. The local manager is in communication connection with the main controller, so that the local manager can receive an operation permission signal sent by the main controller; specifically, after the local manager receives an operation permission signal sent by the main controller, the local manager is started within a set time period, and the photovoltaic module can output normal voltage to the inverter; and during the non-set time period (i.e. all time periods except the set time period), the local manager disconnects the photovoltaic module from the main line or reduces the output voltage of the photovoltaic module.
In the embodiment, a plurality of photovoltaic modules are arranged, and a plurality of local managers are correspondingly arranged, so that each photovoltaic module can be connected with and disconnected from a 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. Of course, in other embodiments, the number of the local managers may also be set to be less than the number of the photovoltaic modules, and then one local manager may be used to control the on/off of a plurality of photovoltaic modules; the main controller may also be separately disposed at any position of the photovoltaic system, and is not limited herein.
The photovoltaic assembly comprises a photovoltaic lamination part and a frame positioned on the periphery of the photovoltaic lamination part, and the local manager is arranged on the photovoltaic assembly and is specifically positioned on the frame or the photovoltaic lamination 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 particularly limited herein.
Fig. 2 shows a relationship diagram of the operation permission signal and the on-off state of the photovoltaic module. As can be seen from this fig. 2: the local manager is started between the time point T1 and the time point T2 after receiving an operation permission signal sent by the main controller, so that the photovoltaic module outputs normal voltage to the inverter, wherein T2 is later than T1. That is, the "setting time period" is between T1 and T2 after the local manager receives an operation permission signal from the master controller, and between T1 and T2 of the operation permission signal, the photovoltaic module is in the on state; and when the time point is not between T1 and T2, the photovoltaic module is in an off state.
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 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 the local manager disconnects the photovoltaic module from the main line or reduces the output voltage of the photovoltaic module when the photovoltaic module is not in any time point between T1 and T2 of the allowed operation signal. Two specific examples will be described in detail below.
Fig. 3 shows a first on-off state waveform diagram of the photovoltaic module. From this figure it can be seen that: the operation allowing signal is transmitted continuously and periodically, and the transmission period of the operation allowing signal is less than or equal to delta T (T2-T1), wherein T1 is 0-30S after the local manager receives the operation allowing signal, T2 is 0.1-60S after the local manager receives the operation allowing signal, and T2 is later than T1.
Taking FIG. 3 as an example, T01Indicating the point in time when the local manager received the first signal to allow operation, T11Indicating the point in time when the photovoltaic module starts to conduct after the local manager receives the first signal to allow operation, T21Indicating the point in time when the local manager starts to switch off the photovoltaic module after receiving the first signal to allow operation, i.e. T01～T11This time is the reaction time of the photovoltaic module, T11～T21The period of time is the conduction time of the photovoltaic module; by analogy, T02Indicating the point in time when the local manager received the second signal to allow operation, T12Indicating the point in time when the photovoltaic module starts to switch on after the local manager receives the second enable signal, T22Indicating the time point when the photovoltaic module starts to be switched off after the local manager receives the second operation allowing signal; therefore, under the action of the first operation allowing signal, the photovoltaic module is not switched off in time and is switched on continuously under the action of the second operation allowing signal, and at the moment, the continuous switching on of the photovoltaic module is realized.
That is, the turn-on conditions of the photovoltaic module in fig. 3 are: the photovoltaic module is in a conducting state between any one time point T1 and T2 of the operation allowing signal, and the photovoltaic module can be kept continuously conducting when the transmission period delta T ≦ (T2-T1) of the operation allowing signal; the turn-off conditions of the photovoltaic module are as follows: and when the photovoltaic module is not in the time point from T1 to T2 of any one operation allowing signal, the photovoltaic module is in an off state.
Fig. 4 is a waveform diagram showing a second on-off state of the photovoltaic module. From this figure it can be seen that: the operation signal is allowed to be transmitted continuously and periodically, but the photovoltaic module cannot keep a continuous conducting state, because: when the operation permission signal is interrupted in one transmission period, the local manager responds immediately, the photovoltaic module is turned off immediately (namely the output voltage is reduced to zero), and the transmission period of the operation permission signal is delta T > (T2-T1), wherein T1 is 0-30S after the local manager receives the operation permission signal, T2 is 0.1-60S after the local manager receives the operation permission signal, and T2 is later than T1.
That is, the turn-on conditions of the photovoltaic module in fig. 4 are: the photovoltaic module is in an on state between any time point T1 and T2 of the operation allowing signal, and when a transmission period Delta T > (T2-T1) of the operation allowing signal exceeds T2 time in one transmission period, the photovoltaic module enters an off state; namely, the turn-off conditions of the photovoltaic module are as follows: and when the photovoltaic module is not in the time point from T1 to T2 of any one operation allowing signal, the photovoltaic module is in an off state.
It should be noted that: in fig. 3 and fig. 4, a "falling edge" is used as a starting time point of the operation-allowed signal, but in other embodiments or practical processes, a "rising edge" or a certain part of a rising process may also be used as a starting time point of the operation-allowed signal, and this is not limited here.
From the above fig. 3 and 4, it can be seen that: the utility model discloses a photovoltaic system need not judge whether allow the running signal to skip some pulses, but directly switches on or shuts off photovoltaic module according to allowing the running signal have or not and preset's rule (if set for the time quantum), has reduced the judgement process for reliability and security reinforcing. This is because: once the decision process is generated, the more hard software involved, the more decision actions, the higher the complexity and the worse the reliability; conversely, the smaller the decision action, the lower the complexity and the higher the security.
As shown in fig. 5, the operation method of the photovoltaic system of the present invention mainly includes the following steps:
connecting the photovoltaic module to a main line;
when the local manager receives an operation permission signal sent by the main controller, the local manager is started within a set time period, and the photovoltaic module is connected to the main circuit and outputs normal voltage to the inverter; and in the non-set time period, the local manager disconnects the photovoltaic module from the main line or reduces the output voltage of the photovoltaic module.
The "setting time period" is specifically: the local manager receives any one operation permission signal sent by the main controller from T1 to T2; the "non-set time period" is specifically: not between any of the time points T1 to T2, where T2 is later than T1, at which the run enable signal is enabled.
It can thus be further demonstrated that: the utility model discloses a photovoltaic system need not judge whether allow the running signal to have skipped some pulses when the operation, but directly switches on or shuts off photovoltaic module according to allowing the existence of running signal and the rule that preset is good, has reduced the judgement process, has strengthened reliability and security.
As one of the preferred embodiments 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, the signal receiving end is used to receive the operation-allowed signal sent by the main controller, and controls the switch to be closed or opened between the time points T1 and T2 after receiving the operation-allowed signal, so that the photovoltaic module is connected to the main line and outputs the normal voltage to the inverter, and controls the switch to be opened or closed at other time periods (i.e. non-set time periods), so that the photovoltaic module is disconnected from the main line or the output voltage of the photovoltaic module is reduced.
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 controls the switch to be closed, the photovoltaic module can be connected to the main line and outputs normal voltage to the inverter, and if the signal receiving end controls the switch to be opened, the photovoltaic module is disconnected from the main line. When the switch is connected with the photovoltaic module in parallel, if the signal receiving end controls the switch to be opened, the photovoltaic module can output normal voltage to the inverter at the moment, if the signal receiving end controls the switch to be closed, the photovoltaic module outputs low voltage to the inverter at the moment, and of course, the low voltage refers to human body safety voltage, the specific numerical value is not limited, and only can emergency response personnel be ensured not to be shocked by high voltage when handling emergency abnormal events.
As another preferred embodiment of the present invention, the switch in the above embodiments may be replaced by a voltage regulator, and at this time, the signal receiving end is used to receive the operation-allowed signal sent by the main controller, and control the voltage regulator to operate between the time points T1 and T2 after receiving the operation-allowed signal, so that the photovoltaic module is connected to the main line and outputs the normal voltage to the inverter, and control the voltage regulator to operate at other time periods (i.e., non-set time periods) to reduce the output voltage of the photovoltaic module. Preferably, the voltage regulating device is a DC/DC power converter.
Specifically, in a set time period, the photovoltaic module is connected to a main line, the photovoltaic module can output normal voltage to the inverter, and the whole photovoltaic system works normally; within a non-set time period, the voltage regulating device can disconnect the photovoltaic module from the main line and can also keep the photovoltaic module connected with the main line, but at the moment, the voltage regulating device needs to regulate the output voltage of the photovoltaic module, so that the output voltage of the photovoltaic module is reduced, and emergency response personnel are prevented from being shocked by high voltage when handling emergency abnormal events.
Of course, the photovoltaic system of this application also can turn off or reduce output voltage automatically when taking place unusually to guarantee that emergency response personnel are not shocked by the high voltage. The term "exception" as used herein generally includes: temperature anomalies, voltage anomalies, current anomalies, and so forth. Taking "temperature anomaly" as an example, when the temperature at a certain position of the photovoltaic system continuously or repeatedly exceeds a certain value within a period of time, the temperature anomaly can be determined, and at this time, the local manager sends a control instruction to the photovoltaic module, so that the photovoltaic module is disconnected from the main line or the output voltage of the photovoltaic module is reduced.
Specifically, as shown in fig. 6, for the second structure of the photovoltaic system of the present invention, in this structure, the photovoltaic system further includes a sensing device, which is in communication connection with the local manager, and is used to automatically disconnect the photovoltaic module from the main line or reduce the output voltage of the photovoltaic module when monitoring an abnormality. The sensing device may be a temperature sensor, a smoke sensor, a fire sensor, a voltage sensor, a current sensor, or other pre-warning sensor, and is not limited herein. The following will exemplify a temperature sensor.
When the temperature sensor detects that the ambient temperature exceeds a certain value (e.g., 200 ℃) continuously or repeatedly within a certain period of time, it can be determined that the temperature is abnormal. The "certain period of time" and the "certain value" are not particularly limited and may be set according to the actual circumstances.
When the temperature sensor tests that the temperature is abnormal, a temperature abnormal signal can be sent to the local manager, and the local manager controls the corresponding photovoltaic module to be disconnected or the output voltage to be reduced. Of course, the local manager can also query the monitoring result of the temperature sensor by itself, and judge whether the temperature sensor monitors abnormality according to the monitoring result, and then judge whether the photovoltaic module needs to be automatically disconnected or the output voltage of the photovoltaic module needs to be reduced. In this embodiment, the installation positions and the installation number of the temperature sensors are not limited, and the temperature sensors may be installed in the local manager, the main controller, or any position of the photovoltaic system.
Of course, the utility model discloses a photovoltaic system also can be directly through manual mode with photovoltaic module disconnection or reduce photovoltaic module's output voltage on the road from the mainline, if: and manually switching off the main controller, so that the main controller sends a switching-off instruction to the local manager, the photovoltaic module is disconnected from the main line or the output voltage of the photovoltaic module is limited to be lower than a certain value, at the moment, the signal receiving end is also used for receiving the switching-off instruction sent by the main controller and controlling the switch to be closed or opened (or controlling the voltage regulating device to operate) according to the switching-off instruction, and the photovoltaic module is disconnected from the main line or the output voltage of the photovoltaic module is reduced. The "shutdown command" may also be replaced by a "stop sending operation permission signal command", as long as the photovoltaic module can be controlled to be disconnected from the main line or the output voltage of the photovoltaic module is limited to be lower than a certain value, so that emergency response personnel can be ensured not to be shocked by high voltage.
That is, in the embodiment shown in fig. 6, when a constructor is handling an emergency abnormal event, the circuit in the photovoltaic system may be manually cut off at any time, or the photovoltaic system automatically cuts off the circuit according to an abnormal situation, so that the maximum output voltage of the photovoltaic system is reduced to a human body safety voltage, and the constructor is ensured not to be shocked by a high voltage.
As shown in fig. 7, when the photovoltaic system shown in fig. 6 is operated, first, the photovoltaic module is connected to the main line; when the main controller sends a turn-off instruction, the local manager firstly judges whether the turn-off instruction is received, and if the turn-off instruction is received, the local manager controls the corresponding photovoltaic module to be disconnected from the main line or reduces the output voltage of the photovoltaic module; if the abnormal condition is not detected, the local manager judges whether the sensing device monitors the abnormal condition or not, if the sensing device monitors the abnormal condition, the local manager controls the corresponding photovoltaic module to be disconnected from the main line or reduces the output voltage of the photovoltaic module, and the photovoltaic module can be recovered to the normal transmission state until the abnormal condition is removed.
The specific operation method can be summarized as follows:
step one, connecting a photovoltaic module to a main line;
step two, when the main controller sends a turn-off instruction, the local manager judges whether the turn-off instruction is received, if so, the step three is entered, and if not, the step four is entered;
step three, the local manager controls the photovoltaic module to be disconnected from the main line, or reduces the output voltage of the photovoltaic module;
and step four, the local manager judges whether the sensing device monitors abnormality, if so, the local manager controls the photovoltaic module to be disconnected from the main line, or reduces the output voltage of the photovoltaic module.
Wherein, step two includes: and manually shutting down the main controller, so that the main controller sends a shut-down instruction to the local manager.
To sum up, the utility model discloses a photovoltaic system on the one hand according to whether main control unit has sent the permission running signal and has controlled local manager and switch on or shut off to this size of control photovoltaic module's output voltage, that is to say, the utility model discloses a photovoltaic system can be when constructor handles urgent unusual incident, cut off the circuit in the system at any time for the maximum output voltage of photovoltaic system reduces to human safe voltage, ensures that constructor is not shocked by the high voltage electricity; on the other hand, by utilizing the communication connection between the sensing device and the local manager, the local manager can reduce the output voltage of the photovoltaic module when receiving a turn-off instruction sent by the main controller or when the sensing device monitors abnormality, so that the maximum output voltage of the photovoltaic system is reduced to the human body safety voltage, and the constructor is ensured not to be shocked by high voltage.
The above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present invention.
Claims (11)
1. A photovoltaic system, characterized by: including photovoltaic module, local manager, main control unit and inverter, the inverter passes through main line electric connection with photovoltaic module, the one end and the photovoltaic module of local manager are connected, the other end is connected to the main line to switch on or shut off between control photovoltaic module and the inverter, photovoltaic system still includes sensing device, local manager respectively with main control unit with sensing device communication is connected, so that local manager is receiving the shutoff instruction that main control unit sent perhaps sensing device monitors when unusual, control photovoltaic module breaks off or reduces on the main line photovoltaic module's output voltage.
2. The photovoltaic system of claim 1, wherein: the sensing device is an early warning sensor.
3. The photovoltaic system of claim 2, wherein: the sensing device is a temperature sensor, a smoke sensor, a fire sensor, a voltage sensor or a current sensor.
4. The photovoltaic system of claim 1, wherein: the sensing device is used for sending an abnormal signal to the local manager when monitoring abnormality, and the local manager controls the photovoltaic module to be disconnected from a main line or reduces the output voltage of the photovoltaic module.
5. The photovoltaic system of claim 1, wherein: the local manager is also used for inquiring the monitoring result of the sensing device and judging whether the sensing device monitors abnormity according to the monitoring result.
6. The photovoltaic system of claim 1, wherein: and the local manager is in communication connection with the main controller through a wireless network or a PLC.
7. The photovoltaic system of claim 1, wherein: the local manager comprises a signal receiving end connected with the main controller and a switch connected with the signal receiving end, wherein the signal receiving end is used for receiving a turn-off instruction sent by the main controller and controlling the switch to be turned on or off according to the turn-off instruction, so that the photovoltaic module is disconnected from a main line or the output voltage of the photovoltaic module is reduced.
8. The photovoltaic system of claim 7, wherein: the switch is connected with the photovoltaic module in series, and when the signal receiving end controls the switch to be turned on, the photovoltaic module is disconnected with the main line.
9. The photovoltaic system of claim 7, wherein: the switch is connected with the photovoltaic module in parallel, and when the signal receiving end controls the switch to be switched on and off, the photovoltaic module outputs low voltage to the inverter.
10. The photovoltaic system of claim 1, wherein: the local manager comprises a signal receiving end connected with the main controller and a voltage regulating device connected with the signal receiving end, wherein the signal receiving end is used for receiving a turn-off instruction sent by the main controller and controlling the voltage regulating device to operate according to the turn-off instruction, so that the photovoltaic module is disconnected from a main line or the output voltage of the photovoltaic module is reduced.
11. The photovoltaic system of claim 10, wherein: the voltage regulating device is a DC/DC power converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121300380.2U CN215222138U (en) | 2021-06-10 | 2021-06-10 | Photovoltaic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121300380.2U CN215222138U (en) | 2021-06-10 | 2021-06-10 | Photovoltaic system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215222138U true CN215222138U (en) | 2021-12-17 |
Family
ID=79424894
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121300380.2U Active CN215222138U (en) | 2021-06-10 | 2021-06-10 | Photovoltaic system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215222138U (en) |
-
2021
- 2021-06-10 CN CN202121300380.2U patent/CN215222138U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2752881B1 (en) | Shutdown method for photovoltaic system | |
| CN108206570B (en) | Direct-current power transmission system between electric vehicles and control method | |
| CN214799407U (en) | Photovoltaic system, photovoltaic module and local manager | |
| US8928175B2 (en) | Junction box, energy system and method for controlling the same | |
| CN109193610B (en) | Shutdown control system and method | |
| US20200274350A1 (en) | Emergency shutdown of an energy supply unit | |
| CN110649645B (en) | Quick turn-off device and photovoltaic power generation system applicable to same | |
| CN215222138U (en) | Photovoltaic system | |
| WO2021038914A1 (en) | Solar power generation network shut-off unit and solar power generation network shut-off system comprising same | |
| CN109149777A (en) | A kind of shutdown control system and method | |
| CN114400791B (en) | Intelligent photovoltaic power generation monitoring device based on Internet of things and automatic turn-off method | |
| WO2019076152A1 (en) | Method and system for safety protection of photovoltaic system | |
| CN115473492A (en) | Photovoltaic system and method for operating same | |
| CN215222137U (en) | Photovoltaic system | |
| CN215934815U (en) | Photovoltaic system and local manager | |
| JP7176611B2 (en) | Solar power system | |
| JPH1141818A (en) | Distributed power generation system | |
| CN115117846A (en) | Photovoltaic system, photovoltaic module, local manager and photovoltaic system operation method | |
| CN115473493A (en) | Photovoltaic system and method for operating same | |
| CN115473491A (en) | Photovoltaic system, local manager and self-checking method of photovoltaic system | |
| JPH08289563A (en) | System interconnection power supply | |
| WO2022193854A1 (en) | Photovoltaic system, photovoltaic assembly, local manager and photovoltaic system operation method | |
| KR20160113784A (en) | Electricity Information Management System | |
| CN214674360U (en) | Generator load control system | |
| CN213521411U (en) | Intelligent removing system for faults of electrified railway contact network section |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |