CN115912957A - Operating method and device of micro inverter, micro inverter and storage medium - Google Patents
Operating method and device of micro inverter, micro inverter and storage medium Download PDFInfo
- Publication number
- CN115912957A CN115912957A CN202310223295.8A CN202310223295A CN115912957A CN 115912957 A CN115912957 A CN 115912957A CN 202310223295 A CN202310223295 A CN 202310223295A CN 115912957 A CN115912957 A CN 115912957A
- Authority
- CN
- China
- Prior art keywords
- input filter
- input
- micro
- unit
- inverter
- 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.)
- Pending
Links
- 238000011017 operating method Methods 0.000 title claims description 18
- 238000001914 filtration Methods 0.000 claims abstract description 63
- 238000000034 method Methods 0.000 claims abstract description 29
- 230000002159 abnormal effect Effects 0.000 claims description 52
- 238000006243 chemical reaction Methods 0.000 claims description 12
- 238000004590 computer program Methods 0.000 claims description 10
- 238000012545 processing Methods 0.000 claims description 6
- 230000002035 prolonged effect Effects 0.000 abstract description 9
- 238000004891 communication Methods 0.000 description 9
- 238000010438 heat treatment Methods 0.000 description 5
- 230000005856 abnormality Effects 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 230000001186 cumulative effect Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000013507 mapping Methods 0.000 description 2
- 239000000565 sealant Substances 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000003878 thermal aging Methods 0.000 description 1
- 238000012549 training Methods 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
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
Abstract
The invention discloses a working method of a micro inverter, a control device, the micro inverter and a storage medium, wherein the micro inverter comprises at least two input filtering units for filtering direct current input signals of the micro inverter, and the working method of the micro inverter comprises the following steps: and controlling the input filter units to work in turn. According to the technical scheme, the micro inverter is provided with at least two input filtering units, and the control device controls the input filtering units to be switched on to work in turn, so that the service life of the input filtering part of the micro inverter is prolonged greatly in a doubled mode, and the service life of the micro inverter is prolonged greatly.
Description
Technical Field
The invention relates to the technical field of micro-inverters, in particular to a working method of a micro-inverter, a control device, a micro-inverter and a storage medium.
Background
The micro inverter is an essential part of a photovoltaic system, is a device for converting direct current generated by a single solar cell module into alternating current, and all electricity generated by the solar cell panel can be output outwards only through the processing of the micro inverter. The micro inverter can realize MPPT (Maximum Power Point Tracking) of a component level, so that Power generation among each photovoltaic component is not influenced, a short plate effect of component series connection is avoided, the generated energy of the whole string of components cannot be influenced due to partial shielding and inconsistent orientation, operation and maintenance of the component level can be realized, and wide attention is paid. Because the micro inverter needs to be installed outdoors, in order to ensure that the micro inverter can work normally and stably under various severe environments, the whole shell is generally filled with self-adhesive heat-conducting flame-retardant pouring sealant, so that circuit devices are completely sealed in the pouring sealant; when any circuit device is broken, the whole micro inverter needs to be replaced, so that the service life of the micro inverter is determined by the device with the shortest service life in the circuit devices. Compared with other circuit devices, the input filter device (filter capacitor) of the micro inverter has the shortest service life.
In the prior art, the service life of a micro inverter is prolonged by improving the production process, production materials and the like for researching and developing an input filter device so as to produce the high-quality input filter device with longer service life. Although the service life of the high-quality input filter device is improved compared with that of a common input filter device, the service life of the high-quality input filter device is still greatly different from that of other circuit devices of the micro inverter, so that the service life of the micro inverter is still not long.
Disclosure of Invention
The invention provides a working method of a micro inverter, aiming at greatly prolonging the service life of the micro inverter.
In order to achieve the above object, the present invention provides an operating method of a micro-inverter, wherein the micro-inverter includes at least two input filtering units for filtering a dc input signal thereof, and the operating method of the micro-inverter includes:
and controlling the input filter units to work in turn.
In some embodiments, said controlling the respective input filter units to work in turn comprises:
acquiring the configured working time period of each input filtering unit;
controlling each input filter unit to work in turn according to the working time period of each input filter unit;
or, the controlling each input filter unit to work in turn includes:
and controlling each input filter unit to work in turn according to a preset switching frequency.
In some embodiments, the method of operating the microinverter further includes:
detecting whether the currently working input filtering unit is abnormal or not;
and when the currently working input filtering unit is determined to be abnormal, executing abnormal processing.
In some embodiments, the performing exception handling comprises:
marking the currently working input filter unit as abnormal, and reconfiguring working time periods for each non-abnormal input filter unit;
controlling each non-abnormal input filter unit to work in turn according to the configured working time period;
or, the performing exception handling includes:
and marking the currently working input filter unit as abnormal, and controlling the non-abnormal input filter units to work in turn according to the preset switching frequency.
In some embodiments, the method of operating the microinverter further includes:
acquiring state parameters of a currently working input filtering unit, wherein the state parameters at least comprise temperature;
determining whether the state parameter meets a preset switching condition;
if yes, switching the next input filter unit to work.
In some embodiments, the method of operating the microinverter further includes:
acquiring the ambient temperature around the micro inverter;
and when the ambient temperature exceeds a preset temperature range, determining a switching frequency corresponding to the ambient temperature determination, and controlling each input filtering unit to work in turn according to the determined switching frequency.
The present invention also proposes a control device comprising a memory, a processor and a computer program stored on said memory and executable on said processor, said computer program, when executed by said processor, implementing the steps of the operating method of the microinverter described above.
The present invention also proposes a micro-inverter comprising:
a DC input terminal;
an alternating current output end;
the input filtering units comprise at least two units and are used for filtering the direct current input signals of the direct current input end;
the DC-DC conversion unit is used for boosting the filtered direct current input signal;
the DC-AC inversion unit is electrically connected with the DC-DC conversion unit and is used for inverting the direct current signals boosted and output by the DC-DC conversion unit into alternating current output signals and outputting the alternating current output signals from the alternating current output end; and the number of the first and second groups,
in the control device, the processor of the control device is electrically connected with each input filtering unit.
In some embodiments, the micro-inverter includes a housing, the DC-DC conversion unit, the DC-AC inversion unit and the control device are all encapsulated in the housing, and the input filter unit is disposed outside the housing and detachably connected to the housing.
The present invention also proposes a storage medium having a computer program stored thereon, which, when being executed by a processor, implements the steps of the operating method of the micro-inverter described above.
According to the technical scheme, the micro inverter is provided with the at least two input filtering units, and the control device controls the input filtering units to be switched on and work in turn, so that the service life of the input filtering part of the micro inverter is prolonged greatly in a doubled mode, and the service life of the micro inverter is prolonged greatly.
Drawings
FIG. 1 is a schematic flow chart of a method of operating a micro-inverter according to a first embodiment of the present invention;
FIG. 2 is a schematic flow chart of a second embodiment of a method for operating a micro-inverter according to the present invention;
FIG. 3 is a schematic flow chart diagram of a method of operating a microinverter of the present invention;
FIG. 4 is a schematic flow chart of a method of operating a micro-inverter according to a fourth embodiment of the present invention;
FIG. 5 is a schematic flow chart of a method of operating a micro-inverter according to a fifth embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a control device in a hardware operating environment according to an embodiment of the present invention;
fig. 7 is a schematic block diagram of a micro-inverter according to an embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and back \8230;) in the embodiments of the present invention are only used to explain the relative positional relationship between the components, the motion situation, etc. in a specific posture (as shown in the attached drawings), and if the specific posture is changed, the directional indicators are changed accordingly.
It will also be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between the embodiments may be combined with each other, but must be based on the realization of the technical solutions by a person skilled in the art, and when the technical solutions are contradictory to each other or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The invention provides a working method of a micro inverter. The micro inverter comprises at least two input filtering units for filtering direct current input signals of the micro inverter; the input filtering unit may include a filtering capacitor or a plurality of filtering capacitors connected in parallel, and of course, the input filtering unit may also include other filtering devices, or be formed by other filtering devices.
Referring to fig. 1, fig. 1 is a schematic flow chart of a first embodiment of a method for operating a micro-inverter according to the present invention.
In this embodiment, the operating method of the micro inverter includes:
and S100, controlling each input filter unit to work in turn.
In the embodiments of the present application, the implementation terminal may be a control device, and the control device may be disposed in a housing of the micro-inverter, or may be disposed separately from the micro-inverter, and is in communication connection with the micro-inverter through a wireless or wired connection. The micro inverter adopts the plurality of input filter units, and in the working process of the micro inverter, each input filter unit is controlled to work in turn, namely only one input filter unit is switched on at each time, so that the switched-on input filter unit filters the direct current input signal of the micro inverter, and the rest input filter units do not work, so that each input filter unit is controlled to be switched on in turn to work.
Assuming that the normal service life of each input filter unit is a, the cumulative service life of B input filter units is bxa, and the input filter units are made to work alternately rather than continuously, which increases the service life of each input filter unit, so that the final cumulative service life of each input filter unit is theoretically greater than bxa.
According to the technical scheme, the at least two input filtering units are arranged through the micro inverter, and the control device controls the input filtering units to be switched on to work in turn, so that the service life of the input filtering part of the micro inverter is prolonged by a large time, and the service life of the micro inverter is prolonged by a large time.
Referring to fig. 2, fig. 2 is a schematic flow chart of a second embodiment of the operating method of the microinverter of the present invention.
In this embodiment, controlling the input filter units to work in turn (i.e. step S100) includes:
step S110, acquiring the configured working time period of each input filtering unit;
and step S120, controlling the input filter units to work in turn according to the working time periods of the input filter units.
The control device may store a preset working time period of each input filter unit, or the control device may respectively configure and store the working time periods for each input filter unit according to a preset rule according to the number of the input filter units when the micro-inverter starts to work each time, or the control device may reconfigure the working time periods for each input filter unit according to a preset rule and store the working time periods in the working process of the micro-inverter. The control device firstly obtains the configured working time period of each input filter unit, and then controls each input filter unit to work in turn according to the working time period of each input filter unit, namely controls each input filter unit to work in the respective working time period.
For example, the micro inverter is provided with three input filter units, namely a first input filter unit, a second input filter unit and a third input filter unit, wherein the working time period configured for the first input filter unit is 6-10 points, the working time period configured for the second input filter unit is 10-14 points, and the working time period configured for the third input filter unit is 14-18 points; the control device controls the corresponding input filter unit to be switched on to carry out filtering work according to the current time, for example, when the integral point of 10 is reached, the first input filter unit is controlled to be switched off to stop working, the second input filter unit is controlled to be switched on to carry out working, and for example, when the integral point of 14 is reached, the second input filter unit is controlled to be switched off to stop working, and the third input filter unit is controlled to be switched on to carry out working. Of course, the number of the input filter units in the micro-inverter may also be two or more, and when the number of the input filter units is two, that is, the two input filter units are controlled to alternately operate, the operating time period of one input filter unit may be 6 to 12 points, and the operating time period of the other input filter unit may be 12 to 18 points.
In some embodiments, controlling the input filter units to work in turn (i.e., step S100) includes: and controlling each input filter unit to work in turn according to a preset switching frequency.
The control device may store a preset switching frequency (e.g., N times/day), and the control device controls each input filter unit to be switched on and off according to the preset switching frequency, so that each input filter unit works in turn. For example, if the preset switching frequency is 6 times/day, the input filter unit is switched on every 4 hours, the currently operating input filter unit is stopped, and the next input filter unit is switched on to operate. The control device can be provided with a timing unit, and the input filter unit controls the switching work when the timing of the switching interval duration is reached.
Referring to fig. 3, fig. 3 is a schematic flow chart of a third embodiment of the operating method of the micro-inverter of the present invention.
In this embodiment, the operating method of the microinverter further includes:
step S200, detecting whether the currently working input filter unit is abnormal;
and step S300, executing exception handling when the currently working input filter unit is determined to be abnormal.
When the filtering performance of the currently working input filtering unit is deteriorated or abnormal due to burning out or the like, noise and interference signals in the direct current input signal cannot be filtered, so that the stability of the alternating current output signal of the micro inverter is deteriorated. Therefore, in this embodiment, the abnormality of the currently operating input filter unit is detected, and when it is determined that the currently operating input filter unit is abnormal, it indicates that the currently operating input filter unit cannot be used continuously, and at this time, the abnormality processing is performed, so that the currently operating input filter unit stops operating, and is switched to another output filter for filtering, thereby ensuring the normal operation of the micro-inverter. The step S200 may be performed in real time or periodically (e.g., every 2 minutes).
Optionally, detecting whether the currently operating input filtering unit is abnormal may include: it is detected whether the ripple of the currently operating input filter unit exceeds a predetermined standard (i.e., exceeds a predetermined standard). And when the ripple of the currently working input filtering unit exceeds the standard, determining that the currently working input filtering unit is abnormal so as to execute abnormal processing.
Optionally, the filtering effect of the input filtering unit on the dc input signal has a direct influence on the ac output signal; when the filtering performance of the input filtering unit is deteriorated or burnt out, the alternating current output signal is correspondingly changed; therefore, detecting whether the currently operating input filter unit is abnormal may be: whether the alternating current output signal of the micro inverter is abnormal or not is detected, and whether the currently working input filter unit is burnt out or the performance is poor or not can be determined by determining whether the alternating current output signal of the micro inverter is abnormal or not. Specifically, whether the ac output signal is abnormal may be detected by a corresponding performance test circuit; whether the collected alternating current output signal is abnormal or not can be analyzed through a pre-trained signal analysis model, for example, the collected alternating current output signal and the filtered direct current input signal are input into the signal analysis model, and whether the alternating current output signal is abnormal or not is determined through the signal analysis model, wherein the signal analysis model is completed through training of a large number of signal data samples.
In some embodiments, performing exception handling in step S300 may include:
the currently working input filter unit is marked as abnormal, and the working time period is reconfigured for each non-abnormal input filter unit;
and controlling the non-abnormal input filter units to work in turn according to the configured working time period.
When the currently working input filter unit is determined to be abnormal, the control device marks the currently working input filter unit as abnormal, removes the abnormal input filter unit from each input filter unit in the workflow operation, reconfigures the working time period for other non-abnormal input filter units so as to make the working time period of the non-abnormal input filter unit complement the original working time period of the abnormal input filter unit, and controls the non-abnormal input filter units to work in turn according to the reconfigured working time period. For example, the micro inverter comprises 3 input filter units which are respectively a first input filter unit, a second input filter unit and a third input filter unit, the working time periods respectively correspond to 6 points-10 points, 10 points-14 points and 14 points-18 points, when the first input filter unit works, the first input filter unit is marked as abnormal when the alternating current output signal is determined to be abnormal, the working time periods of the second input filter unit and the third input filter unit are respectively reconfigured to be 6 points-12 points and 12 points-18 points, and the original working time period of the first input filter unit is supplemented.
In some embodiments, performing exception handling in step S300 may include:
and marking the currently working input filter units as abnormal, and controlling the non-abnormal input filter units to work in turn according to the set switching frequency.
When the currently working input filtering unit is determined to be abnormal, the control device marks the currently working input filtering unit as abnormal, removes the abnormal input filtering unit from each input filtering unit in wheel flow working, and controls each input filtering unit which is not abnormal to work in turn according to the set switching frequency.
Of course, in some other embodiments, the exception handling in step S300 may also include: the abnormal reminding can be specifically sound reminding or light reminding, or fault reminding information is sent to a preset terminal (such as a mobile phone or a computer of a worker) so that the worker can know the state of the micro inverter in time to confirm whether maintenance is needed or not.
In the technical scheme of the embodiment, in the working process of the micro inverter, whether the input filtering unit is abnormal or not is detected, and when the abnormality is detected, the abnormality is processed, so that the abnormal input filtering unit stops working and is switched to the non-abnormal input filtering unit to carry out filtering work, and the normal working of the micro inverter is ensured; and the abnormal input filter unit does not participate in the alternate work of the subsequent input filter units. The technical scheme of the embodiment can still ensure the normal work of the micro inverter when the input filter unit is burnt out or the performance is deteriorated. Compared with the existing micro inverter, when the input filter unit is burnt out or the performance of the existing micro inverter is poor, the photovoltaic system needs to be replaced by a new micro inverter, the technical scheme of the embodiment enables the service life of the micro inverter to be longer, reduces the replacement frequency of the micro inverter, and reduces the maintenance cost of the photovoltaic system.
Referring to fig. 4, fig. 4 is a schematic flow chart of a method for operating a micro-inverter according to a fourth embodiment of the present invention.
In this embodiment, the operating method of the micro-inverter further includes:
step S400, acquiring the state parameters of the currently working input filter unit;
step S500, determining whether the state parameters meet preset switching conditions;
and step S600, if yes, switching the next input filter unit to work.
The service life of the filter device (such as a filter capacitor) has a great relationship with the temperature of the filter device during operation; when the temperature is too low, can cause partial discharge in the filter part inside, electrical aging accelerates, and when the temperature was too high, the thermal aging of filter part can accelerate, and this all can influence filter part's life.
In the working process of the input filter unit, the control device acquires the state parameters of the currently working input filter unit, wherein the state parameters comprise temperature (which can be the surface temperature of a device of the input filter unit and the temperature of a position near the input filter unit); the temperature can be detected by a temperature detection unit (such as a temperature sensor), and the continuous working time can be obtained by timing data of a timing unit. Step S400 may be performed in real time or in a timed manner.
The control device stores a preset switching condition, and the preset switching condition can be a preset range (for example, T1-T2); the determining whether the state parameter satisfies the preset switching condition may be determining whether the acquired temperature exceeds a preset range. And if the state parameter is determined to meet the preset switching condition (if the acquired temperature is determined to exceed the preset range), controlling the currently working input filtering unit to stop working, and switching the next input filtering unit to work. Through this embodiment technical scheme, can effectively avoid input filter unit to work under the high temperature state or work under the low temperature state of crossing, effectively prolong input filter unit's life to the life-span of micro-inverter has further been promoted. Of course, if it is determined that the acquired state parameter does not satisfy the preset switching condition, no process may be performed or other processes may be performed.
In some embodiments, the control device may further perform a heating process when it is determined that the temperature of the currently operating input filter unit is lower than a preset temperature value, for example, a heating component for heating the input filter unit is provided in the micro-inverter, and the control device controls the heating component to start the heating process on the input filter unit.
Of course, in other embodiments, the state parameter may also include other parameters, such as duration, and whether to switch the input filter unit is determined by combining the duration and the temperature.
Referring to fig. 5, fig. 5 is a schematic flow chart of a method for operating a micro-inverter according to a fifth embodiment of the present invention.
In this embodiment, the operating method of the micro-inverter further includes:
step S700, acquiring the ambient temperature around the micro inverter;
and step S800, when the ambient temperature exceeds the preset temperature range, determining a switching frequency corresponding to the ambient temperature determination, and controlling each input filter unit to work in turn according to the determined switching frequency.
The micro-inverter has a large difference in ambient temperature in different seasons (e.g., summer, winter, etc.), different regions (e.g., south, north), and different times (e.g., morning, noon, evening), and the ambient temperature may have an influence on the heat dissipation effect of the micro-inverter, and when the ambient temperature is high, the heat dissipation effect of the micro-inverter may be relatively poor, and the input filter unit of the micro-inverter may operate in a relatively high temperature state. The method comprises the steps of obtaining the ambient temperature around the micro inverter, comparing the obtained ambient temperature with a preset temperature range, determining whether the ambient temperature exceeds the preset temperature range, determining the switching frequency corresponding to the obtained ambient temperature when the ambient temperature exceeds the preset temperature range (a mapping relation between the ambient temperature and the switching frequency is pre-stored in a control device, and determining the switching frequency corresponding to the current ambient temperature through the mapping relation), and controlling each input filtering unit to work in turn according to the newly determined switching frequency.
For example, when the ambient temperature is more than the preset temperature range or more than the preset temperature range, the switching frequency is higher, so that the working duration of each input filter unit in the high-temperature environment or the low-temperature environment is shorter, the service life of each input filter unit is prolonged, and the service life of the micro-inverter is further prolonged. For example, at the noon in summer in the south, it is acquired that the ambient temperature is higher than the preset temperature range, and the switching frequency is switched once from the original 4 hours to 1 hour; for another example, in the morning in the north winter, the obtained ambient temperature is lower than the preset temperature range, and the switching frequency is switched once from the original 4 hours to once in half an hour.
Referring to fig. 6, fig. 6 is a schematic structural diagram of a control device in a hardware operating environment according to an embodiment of the present invention.
The control device of the embodiment of the invention can be a singlechip, a desktop computer, a notebook computer, a palm computer, a server and other computing equipment. As shown in fig. 6, the control device may include: a controller 1001 (e.g., CPU), a network interface 1004, a user interface 1003, a memory 1005, and a communication bus 1002. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., a WI-FI interface). The memory 1005 may be a high-speed RAM memory or a non-volatile memory (e.g., a magnetic disk memory). The memory 1005 may alternatively be a storage device separate from the controller 1001 described above.
Those skilled in the art will appreciate that the control device configuration shown in FIG. 6 does not constitute a limitation of the control device, and may include more or fewer components than shown, or some components in combination, or a different arrangement of components.
As shown in fig. 6, the memory 1005, which is a kind of computer storage medium, may include therein an operating system, a network communication module, a user interface module, and a computer program.
In the control device shown in fig. 6, the network interface 1004 is mainly used for connecting to a backend server and performing data communication with the backend server; the user interface 1003 is mainly used for connecting a client (user side) and performing data communication with the client; and the controller 1001 may be used to invoke a computer program stored in the memory 1005.
Based on the computer program proposed in the foregoing embodiments, the present invention also proposes a storage medium storing a computer program, which when executed by a controller, implements the operating method of the micro-inverter described in the foregoing embodiments.
Referring to fig. 7, the present invention also provides a micro inverter, including:
a direct current input terminal DC-IN;
an alternating current output terminal AC-OUT;
an input filtering unit 10, including at least two, for filtering the DC input signal at the DC input terminal DC-IN;
a DC-DC conversion unit 20, configured to boost the filtered DC input signal;
the DC-AC inversion unit 30 is electrically connected with the DC-DC conversion unit 20, and is used for inverting the DC signal boosted and output by the DC-DC conversion unit 20 into an AC output signal and outputting the AC output signal from an AC output end AC-OUT; and (c) a second step of,
in the control device 40, the processor of the control device 40 is electrically connected to each input filter unit 10.
The specific structure of the control device 40 refers to the above embodiments, and since the present micro-inverter adopts all technical solutions of all embodiments of the control device 40, at least all beneficial effects brought by the technical solutions of the above embodiments are achieved, and no further description is given here.
IN some embodiments, the control device 40 may further include a plurality of switch subunits, the switch subunits correspond to the input filter units 10 one by one, the input filter units 10 and the switch subunits corresponding thereto are connected IN series between the positive and negative poles of the DC input terminal DC-IN, and the processor is electrically connected to each switch subunit to control on/off of each subunit; the processor controls the alternate operation of the input filter unit 10 by controlling the on-off of the switch unit.
In some embodiments, the micro-inverter further comprises a first temperature detection unit electrically connected to the processor of the control device 40, for detecting the temperature feedback of each input filter unit 10 to the processor;
in some embodiments, the microinverter further includes a second temperature detection unit electrically connected to the processor for detecting an ambient temperature feedback to the processor.
In some embodiments, the micro-inverter includes a housing, the DC-DC conversion unit 20, the DC-AC inversion unit 30 and the control device 40 are all encapsulated in the housing, and the input filter unit 10 is disposed outside the housing and detachably connected to the housing.
In the several embodiments provided in the present application, it should be understood that the disclosed method and apparatus may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the modules is only one type of logical functional division, and other divisions may be realized in practice, for example, a plurality of modules or components may be combined or integrated into another apparatus, or some features may be omitted, or not executed. In addition, the shown or discussed coupling or direct coupling or communication connection between each other may be through some interfaces, indirect coupling or communication connection between devices or modules, and may be in an electrical, mechanical or other form.
The modules described as separate parts may or may not be physically separate, and parts displayed as modules may or may not be physical modules, may be located in one position, or may be distributed on a plurality of network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
In addition, functional modules in the embodiments of the present invention may be integrated into one processing module, or each of the modules may exist alone physically, or two or more modules are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode.
The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above description is only a part of or preferred embodiments of the present invention, and neither the text nor the drawings should be construed as limiting the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings or directly/indirectly applied to other related technical fields in the spirit of the present invention are included in the scope of the present invention.
Claims (10)
1. A method of operating a microinverter that includes at least two input filtering units for filtering its dc input signal, the method comprising:
and controlling the input filter units to work in turn.
2. The operating method of a micro-inverter according to claim 1, wherein the controlling the respective input filter units to operate in turn comprises:
acquiring the configured working time period of each input filtering unit;
controlling each input filter unit to work in turn according to the working time period of each input filter unit;
or, the controlling of the input filter units to work in turn comprises:
and controlling the input filter units to work in turn according to the preset switching frequency.
3. The operating method of a microinverter of claim 1, further comprising:
detecting whether the currently working input filtering unit is abnormal or not;
and when the currently working input filtering unit is determined to be abnormal, executing abnormal processing.
4. The operating method of a microinverter according to claim 3, wherein the performing exception handling includes:
marking the currently working input filter unit as abnormal, and reconfiguring working time periods for each non-abnormal input filter unit;
controlling the non-abnormal input filter units to work in turn according to the configured working time period;
or, the performing exception handling includes:
and marking the currently working input filter units as abnormal, and controlling the non-abnormal input filter units to work in turn according to the preset switching frequency.
5. The method of operating a microinverter of claim 1, further comprising:
acquiring state parameters of a currently working input filtering unit, wherein the state parameters at least comprise temperature;
determining whether the state parameters meet preset switching conditions;
if yes, switching the next input filter unit to work.
6. The method of operating a microinverter according to claim 1, further comprising:
acquiring the ambient temperature around the micro inverter;
and when the ambient temperature exceeds a preset temperature range, determining a switching frequency corresponding to the ambient temperature determination, and controlling each input filter unit to work in turn according to the determined switching frequency.
7. A control device, characterized in that it comprises a memory, a processor and a computer program stored on said memory and executable on said processor, said computer program, when executed by said processor, implementing the steps of the operating method of a micro-inverter according to any one of claims 1 to 6.
8. A microinverter, characterized in that it comprises:
a direct current input terminal;
an alternating current output terminal;
the input filtering units comprise at least two units and are used for filtering the direct current input signals of the direct current input end;
the DC-DC conversion unit is used for boosting the filtered direct current input signal;
the DC-AC inversion unit is electrically connected with the DC-DC conversion unit and is used for inverting the direct current signals boosted and output by the DC-DC conversion unit into alternating current output signals and outputting the alternating current output signals from the alternating current output end; and (c) a second step of,
the control device of claim 7, wherein the processor of the control device is electrically connected to each of the input filter units.
9. The micro-inverter according to claim 8, wherein the micro-inverter comprises a housing, the DC-DC conversion unit, the DC-AC inversion unit and the control device are all encapsulated in the housing, and the input filter unit is disposed outside the housing and detachably connected to the housing.
10. A storage medium, characterized in that it has stored thereon a computer program which, when being executed by a processor, carries out the steps of the operating method of a microinverter according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310223295.8A CN115912957A (en) | 2023-03-09 | 2023-03-09 | Operating method and device of micro inverter, micro inverter and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310223295.8A CN115912957A (en) | 2023-03-09 | 2023-03-09 | Operating method and device of micro inverter, micro inverter and storage medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115912957A true CN115912957A (en) | 2023-04-04 |
Family
ID=86479232
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310223295.8A Pending CN115912957A (en) | 2023-03-09 | 2023-03-09 | Operating method and device of micro inverter, micro inverter and storage medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115912957A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100244575A1 (en) * | 2009-03-26 | 2010-09-30 | Abb Research Ltd. | Method for controlling single-phase dc/ac converters and converter arrangement |
| US20140029308A1 (en) * | 2011-03-09 | 2014-01-30 | Solantro Semiconductor Corp. | Inverter having extended lifetime dc-link capacitors |
| CN103684018A (en) * | 2013-12-16 | 2014-03-26 | 苏州相城常理工技术转移中心有限公司 | Novel multi-level inverter capacitor voltage balanced circuit and control method thereof |
| CN106230288A (en) * | 2016-08-08 | 2016-12-14 | 湖州新智源电子科技有限公司 | A kind of multichannel MPPT Miniature inverter and control method thereof |
| CN115335257A (en) * | 2020-04-06 | 2022-11-11 | 纬湃科技有限责任公司 | Controlling an electronic switching unit for supplying power to an inductive power load |
-
2023
- 2023-03-09 CN CN202310223295.8A patent/CN115912957A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100244575A1 (en) * | 2009-03-26 | 2010-09-30 | Abb Research Ltd. | Method for controlling single-phase dc/ac converters and converter arrangement |
| US20140029308A1 (en) * | 2011-03-09 | 2014-01-30 | Solantro Semiconductor Corp. | Inverter having extended lifetime dc-link capacitors |
| CN103684018A (en) * | 2013-12-16 | 2014-03-26 | 苏州相城常理工技术转移中心有限公司 | Novel multi-level inverter capacitor voltage balanced circuit and control method thereof |
| CN106230288A (en) * | 2016-08-08 | 2016-12-14 | 湖州新智源电子科技有限公司 | A kind of multichannel MPPT Miniature inverter and control method thereof |
| CN115335257A (en) * | 2020-04-06 | 2022-11-11 | 纬湃科技有限责任公司 | Controlling an electronic switching unit for supplying power to an inductive power load |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107017836B (en) | A kind of photovoltaic generating system and its component IV curved scanning method | |
| CN104124915A (en) | Monitoring system for solar micro-inversion photovoltaic module | |
| EP3101764B1 (en) | Power supply control device and power supply control method | |
| CN111103554B (en) | Power failure detection method, device, circuit system and computer storage medium | |
| JP2017191606A (en) | Access device | |
| JP2016187240A (en) | Hot spot detector | |
| CN115912957A (en) | Operating method and device of micro inverter, micro inverter and storage medium | |
| CN110350591B (en) | Diesel generating set parallel operation system | |
| CN113029391A (en) | Battery temperature detection method and device, household appliance and storage medium | |
| CN209879350U (en) | Temperature control system based on temperature sensing sensor | |
| CN102261330B (en) | Fan test system | |
| JP6702235B2 (en) | Storage battery system, power conditioner, and storage battery life guarantee method | |
| WO2023098025A1 (en) | New energy air conditioner and control method therefor, and electronic device and storage medium | |
| WO2023098024A1 (en) | New energy air conditioner and control method therefor, electronic device, and storage medium | |
| CN210724267U (en) | Movable power supply conversion host and movable energy storage equipment | |
| CN113740623A (en) | Method and device for detecting phase loss, electronic equipment and storage medium | |
| JP2013228794A (en) | Solar cell system | |
| CN103683998A (en) | Method and device for reducing nighttime power consumption of photovoltaic inverter | |
| CN203672970U (en) | Intelligent three-phase charge-control electric energy meter | |
| CN108681308A (en) | A kind of digital control system and its control method based on data feedback | |
| JP6604373B2 (en) | Information processing apparatus, information processing system, information processing method, and computer program | |
| CN210380712U (en) | Switched reluctance motor speed regulation system for fan | |
| CN110752647A (en) | Combined movable energy storage equipment | |
| CN108333515B (en) | Uninterruptible power system capable of displaying internal resistance information of battery | |
| CN212932773U (en) | High-precision power tester |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20230404 |
|
| RJ01 | Rejection of invention patent application after publication |