CN115117846A - Photovoltaic system, photovoltaic module, local manager and photovoltaic system operation method - Google Patents

Photovoltaic system, photovoltaic module, local manager and photovoltaic system operation method Download PDF

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Publication number
CN115117846A
CN115117846A CN202111674690.5A CN202111674690A CN115117846A CN 115117846 A CN115117846 A CN 115117846A CN 202111674690 A CN202111674690 A CN 202111674690A CN 115117846 A CN115117846 A CN 115117846A
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CN
China
Prior art keywords
photovoltaic module
photovoltaic
local manager
inverter
photovoltaic system
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Pending
Application number
CN202111674690.5A
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Chinese (zh)
Inventor
许涛
杨智
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
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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 PCT/CN2022/074459 priority Critical patent/WO2022193854A1/en
Publication of CN115117846A publication Critical patent/CN115117846A/en
Pending legal-status Critical Current

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    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells

Abstract

The invention provides a photovoltaic system, a photovoltaic module, a local manager and a photovoltaic system operation method, wherein the photovoltaic system comprises the photovoltaic module, the local manager, a main controller and an inverter, the inverter is electrically connected with the photovoltaic module through a main circuit, one end of the local manager is connected with the photovoltaic module, the other end of the local manager is connected to the main circuit, and the local manager is in communication connection with the main controller, so that the local manager can be started in a set time period after receiving an operation allowing signal sent by the main controller, the photovoltaic module can output normal voltage to the inverter, and the local manager can disconnect the photovoltaic module from the main circuit or reduce the output voltage of the photovoltaic module in a non-set time period. The photovoltaic system does not need to judge whether the operation allowing signal skips some pulses or not, but directly conducts the photovoltaic component according to the existence of the operation allowing signal and the preset time period, so that the judgment process is reduced, and the reliability and the safety are enhanced.

Description

Photovoltaic system, photovoltaic module, local manager and photovoltaic system operation method
Technical Field
The invention relates to a photovoltaic system, a photovoltaic module, a local manager and a photovoltaic system operation method, and belongs to the technical field of photovoltaics.
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 is contrary 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.
Disclosure of Invention
The invention aims to provide a photovoltaic system which can cut off a circuit in the system at any time, so that the maximum output voltage of the photovoltaic system is reduced to the safe voltage of a human body, and a constructor is ensured not to be shocked by high voltage.
In order to achieve the above object, the present invention provides a photovoltaic system, including a photovoltaic module, a local manager, a main controller and an inverter, where the inverter is electrically connected to the photovoltaic module through a main line, one end of the local manager is connected to the photovoltaic module, and the other end of the local manager is connected to the main line to control the on/off between the photovoltaic module and the inverter, and the local manager is connected to the main controller in a communication manner, so that the local manager is started within a set time period after receiving an operation permission signal sent by the main controller, so that the photovoltaic module outputs a normal voltage to the inverter, and within a non-set time period, the local manager disconnects the photovoltaic module from the main line or reduces the output voltage of the photovoltaic module.
As a further improvement of the invention, the set time period is between T1 and T2 after the local manager receives the operation permission signal sent by the main controller, wherein T2 is later than T1.
As a further improvement of the invention, when the operation permission signal 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 not between any one of the time points T1 to T2, when the operation signal is allowed, the local manager disconnects the photovoltaic module from the main line or reduces the output voltage of the photovoltaic module.
As a further improvement of the invention, the operation allowing signal is transmitted periodically with a transmission period of DeltaT ≦ (T2-T1).
As a further improvement of the invention, T1 is 0-30S after the local manager receives the operation-permitting signal, and T2 is 0.1-60S after the local manager receives the operation-permitting signal.
As a further improvement of the invention, the operation-allowing signal is transmitted periodically, the transmission period is DeltaT > (T2-T1), and in one transmission period 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.
As a further improvement of the invention, T1 is 0-30S after the local manager receives the operation permission signal, and T2 is 0.1-60S after the local manager receives the operation permission signal.
As a further improvement of the invention, the values of T1 and T2 are both set by the local manager; alternatively, the values of T1 and T2 are both set by the master controller transmitting to the local manager.
As a further improvement of the invention, the values of T1 and T2 are fixed; alternatively, the values of T1 and T2 are not fixed.
As a further improvement of the present invention, the local manager includes a signal receiving terminal connected to the main controller and a switch connected to the signal receiving terminal, where the signal receiving terminal is configured to receive an operation-permitted signal sent by the main controller, and control the switch to be closed or opened between time points T1 and T2 after the operation-permitted signal is received, so that the photovoltaic module is connected to the main line and outputs a normal voltage to the inverter, and control the switch to be opened or closed in an unset time period, so that the photovoltaic module is disconnected from the main line or the output voltage of the photovoltaic module is reduced.
As a further improvement of the present invention, the switch is connected in series with the photovoltaic module, when the signal receiving end controls the switch to be closed, the photovoltaic module is connected to the main line and outputs a normal voltage to the inverter, and when the signal receiving end controls the switch to be opened, the photovoltaic module is disconnected from the main line.
As a further improvement of the present invention, the switch is connected in parallel with the photovoltaic module, when the signal receiving terminal controls the switch to be turned on, the photovoltaic module outputs a normal voltage to the inverter, and when the signal receiving terminal controls the switch to be turned off, the photovoltaic module outputs a low voltage to the inverter.
As a further improvement of the present invention, the local manager includes a signal receiving terminal connected to the main controller and a voltage regulating device connected to the signal receiving terminal, where the signal receiving terminal is configured to receive an operation-permitted signal sent by the main controller, and control the voltage regulating device between time points T1 and T2 after the operation-permitted signal is received, so that the photovoltaic module is connected to the main line and outputs a normal voltage to the inverter, and the voltage regulating device is controlled in a non-set time period to reduce an output voltage of the photovoltaic module.
As a further improvement of the invention, the voltage regulating device is a DC/DC power converter.
As a further improvement of the invention, the main controller is arranged within the inverter.
The invention also aims to provide a photovoltaic module, which is applied to the photovoltaic system, wherein the local manager is arranged on the photovoltaic module.
As a further improvement of the invention, the photovoltaic assembly comprises a photovoltaic lamination part and a frame positioned at the periphery of the photovoltaic lamination part, and the local manager is arranged on the frame or the photovoltaic lamination part.
The invention also aims to provide a local manager, which is applied to the photovoltaic system.
The invention also aims to provide an operation method of the photovoltaic system, which reduces the judgment process, is simple, is easy to realize and has higher reliability.
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:
connecting a photovoltaic module to a main line;
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 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 beneficial effects of the invention are: according to the photovoltaic system, the local manager can control the photovoltaic module to output normal voltage to the inverter within the set time period after the main controller sends out the operation permission signal, and the local manager disconnects the photovoltaic module from the main line or reduces the output voltage of the photovoltaic module within the non-set time period.
Drawings
Fig. 1 is a schematic diagram of a first configuration of a photovoltaic system of the present invention.
Fig. 2 is a relationship diagram of the allowable operation signal and the on-off state of the photovoltaic module in the 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 of fig. 1.
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.
As shown in fig. 1, the present invention discloses a photovoltaic system, which includes a photovoltaic module, a local manager, a main controller and an inverter, wherein the inverter is electrically connected to the photovoltaic module through a main line, one end of the local manager is connected to the photovoltaic module, and the other end is connected to the main line, so as to conveniently control the connection or disconnection between the photovoltaic module and the inverter. 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.
It should be noted that: the values of T1 and T2 can be set by the local manager, or the setting can be transmitted from the main controller to the local manager, which is not limited here; the values of T1 and T2 may or may not be fixed, and are not limited herein.
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 and 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 waveform of the on/off state of the photovoltaic module. From this figure it can be seen that: the operation permission signal is transmitted continuously and periodically, 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.
Taking FIG. 3 as an example, T0 1 Indicating the point in time when the local manager received the first signal to allow operation, T1 1 Indicating the point in time when the photovoltaic module starts to conduct after the local manager receives the first signal to allow operation, T2 1 Indicating 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. T0 1 ～T1 1 This time is the reaction time of the photovoltaic module, T1 1 ～T2 1 The period of time is the conduction time of the photovoltaic module; by analogy, T0 2 Indicating the point in time when the local manager received the second enable signal, T1 2 Indicating the point in time when the photovoltaic module starts to switch on after the local manager receives the second enable signal, T2 2 Representing local managersA time point when the photovoltaic module starts to be turned off after the second operation permission signal is received; 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 a 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 to 30S after the local manager receives the operation permission signal, T2 is 0.1 to 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 operation-allowing signal, the photovoltaic module is in the 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 photovoltaic system does not need to judge whether the operation allowing signal skips some pulses, but directly switches on or off the photovoltaic module according to the existence of the operation allowing signal and a preset rule (such as a set time period), so that the judgment process is reduced, and the reliability and the safety are enhanced. 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 "set 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 at which the operating signal is enabled, wherein T2 is later than T1. Here, the values of T1 and T2 can be set by the local manager, and the main controller can also transmit the setting to the local manager; the values of T1 and T2 may or may not be fixed.
It can thus be further demonstrated that: when the photovoltaic system operates, whether the operation allowing signals skip some pulses or not does not need to be judged, the photovoltaic assembly is directly switched on or switched off according to the existence of the operation allowing signals and the preset rule, the judging process is reduced, and the reliability and the safety are enhanced.
As a preferred embodiment of the present invention, the local manager includes a signal receiving terminal connected to the main controller, and a switch connected to the signal receiving terminal, where the signal receiving terminal is configured to receive an operation permission signal sent by the main controller, and control the switch to be closed or opened between time points T1 and T2 after the operation permission signal is received, so that the photovoltaic module is connected to the main line and outputs a normal voltage to the inverter, and control the switch to be opened or closed in 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 regulating device, where the signal receiving end is configured to receive an operation permission signal sent by the main controller, and control the voltage regulating device to operate between time points T1 and T2 after receiving the operation permission signal, so that the photovoltaic module is connected to the main line and outputs a normal voltage to the inverter, and the voltage regulating device is controlled to operate in other time periods (i.e., non-setting 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; in the 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.
In summary, in the photovoltaic system of the present invention, in the set time period after the main controller sends the operation permission signal, the local manager can control the photovoltaic module to output the 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.
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 (19)

1. A photovoltaic system, characterized by: the photovoltaic module is characterized by comprising 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, so that the photovoltaic module and the inverter are controlled to be switched on or switched off, the local manager is in communication connection with the main controller, the local manager is started within a set time period after receiving an operation allowing signal sent by the main controller, 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 within a non-set time period.
2. The photovoltaic system of claim 1, wherein: the set time period is between T1 and T2 after the local manager receives the operation permission signal sent by the main controller, wherein T2 is later than T1.
3. The photovoltaic system of claim 2, wherein: when the operation permission signals are multiple, the local manager is started between the time points T1 to T2 after each operation permission signal sent by the main controller is received, so that the photovoltaic module outputs normal voltage to the inverter; and not between any one of the time points T1 to T2, when the operation signal is allowed, the local manager disconnects the photovoltaic module from the main line or reduces the output voltage of the photovoltaic module.
4. The photovoltaic system of claim 2, wherein: the operation permission signal is transmitted periodically with a transmission period of DeltaT ≦ (T2-T1).
5. The photovoltaic system of claim 4, wherein: t1 is 0-30S after the local manager receives the operation permission signal, and T2 is 0.1-60S after the local manager receives the operation permission signal.
6. The photovoltaic system of claim 2, wherein: the operation permission signal is transmitted periodically with a transmission period delta T > (T2-T1), and in one transmission period of the operation permission signal, the local manager disconnects the photovoltaic module from the main line or reduces the output voltage of the photovoltaic module.
7. The photovoltaic system of claim 6, wherein: t1 is 0-30S after the local manager receives the operation permission signal, and T2 is 0.1-60S after the local manager receives the operation permission signal.
8. The photovoltaic system of claim 5 or 7, wherein:
the values of T1 and T2 are both set by the local manager; alternatively, the first and second liquid crystal display panels may be,
the values of T1 and T2 are both set by the master controller transmitting to the local manager.
9. The photovoltaic system of claim 8, wherein:
the values of T1 and T2 are fixed; alternatively, the first and second electrodes may be,
the values of T1 and T2 are not fixed.
10. The photovoltaic system of claim 2, wherein: the local manager comprises a signal receiving end connected with a main controller and a switch connected with the signal receiving end, wherein the signal receiving end is used for receiving an operation allowing signal sent by the main controller, and controlling the switch to be closed or opened between time points T1 and T2 after the operation allowing signal is received, so that the photovoltaic module is connected to a main line and outputs normal voltage to the inverter, and the switch is controlled to be opened or closed in a non-set time period, so that the photovoltaic module is disconnected from the main line or the output voltage of the photovoltaic module is reduced.
11. The photovoltaic system of claim 10, wherein: the switch is connected with the photovoltaic module in series, when the signal receiving end controls the switch to be switched on, the photovoltaic module is connected to the main line and outputs normal voltage to the inverter, and when the signal receiving end controls the switch to be switched on, the photovoltaic module is disconnected with the main line.
12. The photovoltaic system of claim 10, wherein: the switch is connected with the photovoltaic module in parallel, when the signal receiving end controls the switch to be switched on, the photovoltaic module outputs normal voltage to the inverter, and when the signal receiving end controls the switch to be switched off, the photovoltaic module outputs low voltage to the inverter.
13. The photovoltaic system of claim 2, wherein: the local manager comprises a signal receiving end connected with a main controller and a voltage regulating device connected with the signal receiving end, wherein the signal receiving end is used for receiving an operation allowing signal sent by the main controller and controlling the voltage regulating device between the time points from T1 to T2 after the operation allowing signal is received, so that the photovoltaic module is connected to a main line and outputs normal voltage to the inverter, and the voltage regulating device is controlled in a non-set time period to reduce the output voltage of the photovoltaic module.
14. The photovoltaic system of claim 13, wherein: the voltage regulating device is a DC/DC power converter.
15. The photovoltaic system of claim 1, wherein: the main controller is arranged in the inverter.
16. A photovoltaic module applied to the photovoltaic system according to any one of claims 1 to 15, wherein: the photovoltaic module is provided with the local manager.
17. The photovoltaic module of claim 16, wherein: the photovoltaic module 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 frame or the photovoltaic lamination part.
18. A local manager, characterized by: application to a photovoltaic system according to any one of claims 1 to 15.
19. An operation method of a photovoltaic system, which is applied to the photovoltaic system of any one of claims 1 to 15, characterized by mainly comprising the steps of:
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 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.
CN202111674690.5A 2021-03-18 2021-12-31 Photovoltaic system, photovoltaic module, local manager and photovoltaic system operation method Pending CN115117846A (en)

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CN109428342A (en) * 2017-08-21 2019-03-05 浙江英达威芯电子有限公司 A kind of photovoltaic system component control device
CN109038669B (en) * 2018-08-23 2024-01-05 嘉兴爱索乐信息技术有限公司 Photovoltaic system for realizing automatic shutdown of assembly level
CN209120129U (en) * 2018-11-15 2019-07-16 上海谦牧信息技术有限公司 A kind of tandem component level photovoltaic turning off system
CN110417347B (en) * 2019-08-15 2022-02-18 浙江英达威芯电子有限公司 Controller and control method for controlling turn-off of photovoltaic module
CN111585308B (en) * 2020-06-15 2022-04-08 阳光电源股份有限公司 Control method of photovoltaic rapid turn-off system and application device and system thereof
CN214799407U (en) * 2021-03-18 2021-11-19 苏州阿特斯阳光电力科技有限公司 Photovoltaic system, photovoltaic module and local manager

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