CN114325306A - Method and device for detecting connectivity of inverter system, electronic equipment and medium - Google Patents
Method and device for detecting connectivity of inverter system, electronic equipment and medium Download PDFInfo
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Abstract
The application relates to a method and a device for detecting connectivity of an inverter system, electronic equipment and a medium, wherein the inverter system comprises a boost chopper circuit, and the method comprises the following steps: acquiring state parameters of the inverter system; determining the connection state of the boost chopper circuit according to the state parameters; and adjusting the working mode of the inverter system according to the communication state. When the connection state is different, the state parameter characteristics of the boost chopper circuit are also different, and therefore, the connection state of the boost chopper circuit can be accurately determined by detecting the state parameter of the circuit.
Description
Technical Field
The present disclosure relates to the field of circuit fault detection, and in particular, to a method and an apparatus for detecting connectivity of an inverter system, an electronic device, and a medium.
Background
In the operation process, the boost chopper circuit can be in a connection state of connection, disconnection, poor contact and the like according to the connection relation between the boost chopper circuit and the power supply input and the load; when the boost chopper circuit is in a disconnected state or a poor-contact connected state, the operation of the circuit is affected, and therefore, how to accurately detect the connectivity of the boost chopper circuit becomes a problem to be solved at present.
Disclosure of Invention
The application provides a method and a device for detecting the connectivity of an inverter system, electronic equipment and a medium, and aims to solve the technical problem of how to accurately detect the connectivity of a boost chopper circuit in the prior art.
In order to solve the above technical problem or at least partially solve the above technical problem, the present application provides an inverter system connectivity detection method, where the inverter system includes a boost chopper circuit, and the method includes:
acquiring state parameters of the inverter system;
determining the connection state of the boost chopper circuit according to the state parameters;
and adjusting the working mode of the inverter system according to the communication state.
Optionally, the BOOST chopper circuit comprises a plurality of BOOST sub-circuits;
the step of obtaining the state parameters of the inverter system comprises:
if a starting instruction is received, acquiring state parameters including bus voltage and shunt circuit voltage of each BOOST sub-circuit;
the step of determining the connection state of the boost chopper circuit according to the state parameter includes:
obtaining a first comparison result by comparing the bus voltage with the shunt voltage of each BOOST sub-circuit;
and determining the connection state of the boost chopper circuit according to the first comparison result.
Optionally, the step of determining the connection state of the boost chopper circuit according to the first comparison result includes:
judging whether the bus voltage is greater than or equal to the maximum shunt voltage or not, and whether the difference value between any two shunt voltages is smaller than a preset first threshold value or not;
if the bus voltage is smaller than the maximum shunt voltage, or the difference value between the two shunt voltages is larger than a preset first threshold value, the boost chopper circuit is not connected in the connected state.
Optionally, the BOOST chopper circuit comprises a plurality of BOOST sub-circuits;
the step of obtaining the state parameters of the inverter system comprises:
when the inverter system runs, acquiring state parameters of input current of each BOOST sub-circuit;
the step of determining the connection state of the boost chopper circuit according to the state parameter includes:
and determining the connection state of the boost chopper circuit according to each input current.
Optionally, the step of determining the connection state of the boost chopper circuit according to each of the input currents includes:
acquiring a minimum current value, and judging whether each input current is continuously smaller than the minimum current value; and if the BOOST sub-circuit with the input current continuously smaller than the minimum current value exists, the connected state of the BOOST sub-circuit is not connected.
Optionally, the step of judging whether the determination condition is reached includes:
aiming at a single input current, judging whether the input current is smaller than the minimum current value within a preset time or within the time when the variation amplitude of the output power reaches a preset amplitude;
if the input current is smaller than the minimum current value within the preset time or the time when the variation amplitude of the output power reaches the preset amplitude, the input current is continuously smaller than the minimum current value.
Optionally, the step of determining the connection state of the boost chopper circuit according to each of the input currents includes:
acquiring a maximum current difference value, and judging whether the difference value between any two input currents is smaller than the maximum current difference value;
if the difference value between the two input currents is larger than the maximum current difference value, the smaller input current in the two input currents with the difference value larger than the maximum current difference value is used as a first input current;
the connected state of the BOOST sub-circuit corresponding to the first input current is poor contact.
In order to achieve the above object, the present invention further provides an inverter system connectivity detection apparatus, including:
the first acquisition module is used for acquiring state parameters of the inverter system;
the first determining module is used for determining the connection state of the boost chopper circuit according to the state parameter;
and the first execution module is used for adjusting the working mode of the inverter system according to the communication state.
To achieve the above object, the present invention further provides an electronic device, which includes a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the computer program, when executed by the processor, implements the steps of the inverter system connectivity detection method as described above.
To achieve the above object, the present invention further provides a computer readable storage medium, having a computer program stored thereon, where the computer program is executed by a processor to implement the steps of the method for detecting connectivity of an inverter system as described above.
The invention provides a method, a device, electronic equipment and a medium for detecting the connectivity of an inverter system, wherein the method comprises the steps of acquiring state parameters of a boost chopper circuit; and determining the connection state of the boost chopper circuit according to the state parameters, and adjusting the working mode of the inverter system according to the connection state. When the connection state is different, the state parameter characteristics of the boost chopper circuit are also different, and therefore, the connection state of the boost chopper circuit can be accurately determined by detecting the state parameter of the circuit.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a schematic flow chart of a method for detecting connectivity of an inverter system according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a boost chopper circuit in the inverter system connectivity detection method of the present invention;
fig. 3 is a schematic diagram of a module structure of the electronic device of the present invention.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all 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 application.
The invention provides an inversion system connectivity detection method, and referring to fig. 1, fig. 1 is a schematic flow chart of a first embodiment of the inversion system connectivity detection method of the invention, the inversion system includes a boost chopper circuit, and the method includes the steps of:
step S10, acquiring state parameters of the inverter system;
the inverter system is used for converting direct current into alternating current; the boost chopper circuit is used for outputting a voltage higher than the input voltage to supply power to the load. The BOOST chopper circuit in this embodiment includes one or more BOOST sub-circuits, and it can be understood that a schematic structural diagram of the BOOST chopper circuit may refer to fig. 2, and a specific BOOST chopper circuit structure may refer to fig. 2The setting is performed according to the prior art, and the detailed description is omitted here. The state parameters comprise input voltage, bus voltage, shunt voltage of BOOST sub-circuit, input current and the like of the inverter system, wherein the input voltage is PV, the bus voltage is VbusThe shunt circuit voltage of the BOOST sub-circuit is VbThe input current of the BOOST sub-circuit is Ib(ii) a The sampling mode of the state parameter can be selected according to actual needs, for example, voltage is sampled through a resistor and an operational amplifier, current is sampled through a current transformer, and the method is not limited herein.
Step S20, determining the connection state of the boost chopper circuit according to the state parameters;
when the circuit is in different communication states, the state parameters of the circuit can correspondingly change, so that the communication state of the circuit can be represented by detecting the state parameters of the circuit; the incidence relation between the connected state and the state parameters can be preset in the circuit, and after the state parameters of the circuit are detected, matching is carried out through the incidence relation so as to determine the connected state of the boost chopper circuit.
The connection state of the BOOST chopper circuit refers to the connection state of each BOOST sub-circuit in the BOOST chopper circuit, and the connection state comprises non-connection, poor contact and connection; the disconnection means that the input end or the output end of the BOOST sub-circuit which should be connected in parallel is not in a parallel state due to the disconnection of a connecting line of the input end of the BOOST sub-circuit or the damage of devices such as a diode in the BOOST sub-circuit, and the like, that is, the BOOST sub-circuit is not connected in parallel to the circuit; poor contact refers to the fact that the difference of input currents between the BOOST sub-circuits is large in circuit operation due to the fact that the difference of inductance impedance characteristics in the BOOST sub-circuits and working characteristics of power devices is large, and current balanced output cannot be achieved; the connection means that the BOOST sub-circuit is in a parallel state, and when the circuit operates, the BOOST sub-circuit can realize current balanced output.
And step S30, adjusting the working mode of the inverter system according to the communication state.
After the connected state of the boost chopper circuit in the inverter system is determined, different subsequent operations can be executed according to the different connected states to adjust the working mode of the inverter system, so that the reliability of the inverter system is improved, and if the unconnected state or poor contact is detected, the connected state, the inverter system and the state parameters of the boost chopper circuit are sent to a management end, such as a monitoring platform or a host computer of a manager; the management end or the inverter system can adjust the working mode of the inverter system according to the communication state of the boost chopper circuit, for example:
when the inverter system is in a self-checking state, if the boost chopper circuit is in an unconnected state, the inverter system is prohibited from entering an operation mode, until the boost chopper circuit is normally connected, the inverter system is controlled to execute other self-checking items, and when all self-checking items of the inverter system pass, the inverter system is controlled to enter an operation state; and if the boost chopper circuit is in a connected state, controlling the inverter system to execute other self-checking items, and controlling the inverter system to enter an operating state after all the self-checking items of the inverter system pass.
When the inverter system is in an operating state, if the boost chopper circuit is in a poor contact state, the inverter system is triggered to perform power derating operation; and if the boost chopper circuit is in a normal communication state, controlling the inverter system to keep the current working state.
When the connected state is different, the state parameter characteristics of the boost chopper circuit are also different, and therefore, the connected state of the boost chopper circuit can be accurately determined by detecting the state parameter of the circuit in the embodiment.
Further, in a second embodiment of the inverter system connectivity detection method provided based on the first embodiment of the present invention, the BOOST chopper circuit includes a plurality of BOOST sub-circuits, where the plurality of BOOST sub-circuits are in a parallel state, and the step S10 includes the steps of:
step S11, if a starting instruction is received, acquiring state parameters including bus voltage and shunt circuit voltage of each BOOST sub-circuit;
the step S20 includes the steps of:
step S21, obtaining a first comparison result by comparing the bus voltage and the shunt voltage of each BOOST sub-circuit;
and step S22, determining the connection state of the boost chopper circuit according to the first comparison result.
When a circuit receives a starting instruction, two conditions exist, namely a new startup and a restart startup; when the starting is started for a new start, the BOOST sub-circuit works, the input voltage charges the bus capacitor through a diode in the BOOST sub-circuit, and at the moment, the bus voltage is the same as the maximum input voltage; when starting up for a restart, the bus voltage may be greater than or equal to the maximum input voltage, since the circuit has been running for some time. When the circuit is started, the inverter system enters a self-checking state to perform self-checking of connectivity, and the BOOST sub-circuit is arranged between the input voltage end and the bus end of the inverter system, so that the shunt voltage of the BOOST sub-circuit can be analogized to be input voltage, and the connectivity state of the BOOST sub-circuit is determined through the relative relation between the shunt voltage and the bus voltage.
Further, the step S22 includes the steps of:
step S221, judging whether the bus voltage is greater than or equal to the maximum shunt voltage, and whether the difference value between any two shunt voltages is smaller than a preset first threshold value;
in step S222, if the bus voltage is less than the maximum shunt voltage, or a difference between the two shunt voltages is greater than a preset first threshold, the boost chopper circuit is not connected.
And if the bus voltage is greater than or equal to the maximum shunt voltage and the difference value between any two shunt voltages is smaller than a preset first threshold value, the connection state of the boost chopper circuit is connected.
As can be seen from the foregoing description, when the power is turned on, if the connection state of the boost chopper circuit is connected, the bus voltage is greater than or equal to the maximum input voltage, and the shunt voltage is directly obtained by supplying power via the input voltage, so that the shunt voltage is necessarily less than or equal to the input voltage, and therefore, when the connection state of the boost chopper circuit is connected, the bus voltage should also be greater than or equal to the shunt voltage; the circuit characteristics of the BOOST sub-circuits are consistent, so that the shunt circuit voltages are the same, the influence of device precision, interference and the like in an actual circuit is considered, a preset first threshold value is set as a margin, when the difference value between the shunt circuit voltages is smaller than the preset first threshold value, the difference between the BOOST sub-circuits is acceptable, and the connection state of the BOOST sub-circuits is considered to be connected; and if the difference value between the two shunt circuit voltages is larger than a preset first threshold value, the connected state of the BOOST sub-circuit with the smaller shunt circuit voltage is not connected.
Specifically, when it is determined whether a difference between the two shunt voltages is greater than a preset first threshold, the maximum shunt voltage may be determined first, and the rest of the shunt voltages are sequentially compared with the maximum shunt voltage, where the connected state of the BOOST sub-circuit where the difference between the shunt voltage and the maximum shunt voltage is greater than the preset first threshold is disconnected.
If the connection state of the boost chopper circuit is connected, other self-checking items are executed, and the specific self-checking items can be set according to actual application scenes and needs and are not limited herein; and when all the self-checking items pass, the boost chopper circuit starts to operate and sends the operation state to the management terminal. If the connected state of the boost chopper circuit is disconnected, self-checking fails, the boost chopper circuit is controlled to restart, a starting failure signal is sent to a management terminal, and when the continuous restarting times exceed a preset restarting threshold value due to the disconnection, the boost chopper circuit is closed.
The present embodiment is capable of determining the state of continuity of the circuit based on the state parameter of the circuit at the time of circuit startup.
Further, in a third embodiment of the inverter system connectivity detection method provided in the first embodiment of the present invention, the BOOST chopper circuit includes a plurality of BOOST sub-circuits; the step S10 includes steps;
step S12, when the BOOST chopper circuit operates, acquiring state parameters of input current of each BOOST sub-circuit;
the step S20 includes the steps of:
step S23 is to determine the connection state of the boost chopper circuit based on each of the input currents.
In the operation of the boost chopper circuit, the connected state needs to be determined in real time according to the state parameters of the circuit; the magnitude of the input current is related to the loop impedance in the BOOST sub-circuit, which varies with the connected state of the BOOST sub-circuit, and therefore the input current can be indicative of the connected state of the BOOST sub-circuit.
Further, the step S23 includes the steps of:
step S231, obtaining a minimum current value, and judging whether each input current is continuously smaller than the minimum current value;
in step S232, if there is a BOOST sub-circuit whose input current is continuously smaller than the minimum current value, the connected state of the BOOST sub-circuit is not connected.
And if the BOOST sub-circuit with the input current continuously smaller than the minimum current value does not exist, the connection state of the BOOST chopper circuit is connected.
The minimum current value is the current of the BOOST sub-circuit when the BOOST sub-circuit outputs an open circuit or an approximate open circuit, the specific minimum current value is set according to the actual circuit, the minimum current value of the actual circuit can be detected in advance, and if the circuit does not output power, the current value of the BOOST sub-circuit is detected through a current sensor and is taken as the minimum current value; typical minimum current values are less than or equal to 0.5 mA.
When the BOOST sub-circuit of which the input current is continuously smaller than the minimum current value is detected, the BOOST sub-circuit corresponding to the input current is considered to be open or approximately open, and therefore, the connected state of the BOOST sub-circuit is not connected.
And setting the disconnection of the BOOST sub-circuit as one of trigger conditions for shutdown protection, executing shutdown protection operation when detecting that the connection state of the BOOST sub-circuit is disconnected, and simultaneously sending the connection state of the circuit to a management end.
Further, the step S231 includes the steps of:
step S2311, for a single input current, determining whether the input current is less than the minimum current value within a preset time or within a time when a variation amplitude of the output power reaches a preset amplitude;
in step S2312, if the input current is smaller than the minimum current value within a preset time or within a time when the variation amplitude of the output power reaches a preset amplitude, the input current is continuously smaller than the minimum current value.
Considering factors such as errors of detection equipment and circuit interference, the possibility that the connection state of the BOOST sub-circuit is misjudged is judged through the instantaneous value of the input current, so that the preset time and the preset amplitude are set, and only when the input current is smaller than the minimum current value within a period of time or a period of power, the connection state of the BOOST sub-circuit corresponding to the input current is considered to be disconnected. It should be noted that, the specific preset time and the preset amplitude may be set according to the actual application circuit and the requirement, and are not limited herein.
According to the embodiment, the connection state of the BOOST sub-circuit can be accurately judged through the input voltage of the BOOST sub-circuit.
Further, in a fourth embodiment of the inverter system connectivity detection method according to the present invention based on the third embodiment of the present invention, the step S23 includes the steps of:
step S233, acquiring a maximum current difference value, and judging whether the difference value between any two input currents is smaller than the maximum current difference value;
step S234, if there is a difference between the two input currents greater than the maximum current difference, taking the smaller input current of the two input currents whose difference is greater than the maximum current difference as a first input current;
in step S235, the connection state of the BOOST sub-circuit corresponding to the first input current is poor contact.
The maximum current difference value is used for representing the maximum difference which is allowed to exist between the BOOST subcircuits; the maximum current difference may specifically be calculated according to the following formula:
wherein, Delta IlimitIs the maximum current difference, PrateFor the rated power, P, of the inverter system in the boost chopper circuitinFor input power of inverter systems in boost chopper circuits, ImaxFor maximum operating current value, I, of a single BOOST sub-circuitnormalThe rated current value of a single BOOST sub-circuit is shown, and k is a regulating coefficient.
In addition, InormalIs the maximum amplitude limit of the maximum current difference, i.e. the maximum current difference is less than or equal to Inormal. The adjustment coefficient may be set according to actual circuit parameters, such as temperature and peak current, again without limitation; in an allowable temperature range, the adjusting coefficient is as large as possible, and when the peak current triggers a limit value, the value of the adjusting coefficient is reduced; specifically, the value range of the regulating coefficient is [ 0.5-1%]。
During specific judgment, the maximum input current in the BOOST sub-circuit can be determined, the input currents of the other BOOST sub-circuits are compared with the maximum input current, the input current with the maximum input current difference value larger than or equal to the maximum current difference value is used as a first input current, and the connection state of the BOOST sub-circuit corresponding to the first input current is determined to be poor contact; and the connection state of the BOOST sub-circuit corresponding to the input current with the maximum input current difference smaller than the maximum current difference is connection.
And setting poor contact of the BOOST sub-circuit as one of the trigger conditions of power derating, executing power derating operation when the connected state of the BOOST sub-circuit is detected to be poor contact, and simultaneously sending the connected state of the circuit to a management terminal. If the connection state of the boost chopper circuit is connected, the operation state of the circuit is maintained, the operation state is sent to the management end, and meanwhile, the state parameters of the circuit are continuously monitored.
In the embodiment, the connection state of the BOOST sub-circuit is accurately judged through the input current of the BOOST sub-circuit in the circuit operation process.
It should be noted that, for simplicity of description, the above-mentioned method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present application is not limited by the order of acts described, as some steps may occur in other orders or concurrently depending on the application. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required in this application.
Through the above description of the embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but the former is a better implementation mode in many cases. Based on such understanding, the technical solutions of the present application may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present application.
The present application further provides an inverter system connectivity detection apparatus for implementing the inverter system connectivity detection method, where the inverter system connectivity detection apparatus includes:
the first acquisition module is used for acquiring state parameters of the boost chopper circuit;
the first determining module is used for determining the connection state of the boost chopper circuit according to the state parameter;
and the first execution module is used for adjusting the working mode of the inverter system according to the communication state.
When the connection states are different, the state parameter characteristics of the boost chopper circuit are also different, so that the connection state of the boost chopper circuit can be accurately determined by the inverter system connection detection device through detecting the state parameters of the circuit.
It should be noted that the first obtaining module in this embodiment may be configured to execute step S10 in this embodiment, and the first determining module in this embodiment may be configured to execute step S20 in this embodiment.
Further, the BOOST chopper circuit comprises a plurality of BOOST sub-circuits; the first obtaining module comprises:
the first obtaining submodule is used for obtaining state parameters including bus voltage and shunt circuit voltage of each BOOST sub-circuit if a starting instruction is received;
the first determining module includes:
the first comparison submodule is used for obtaining a first comparison result by comparing the bus voltage with the shunt circuit voltage of each BOOST sub-circuit;
and the first determining submodule is used for determining the connection state of the boost chopper circuit according to the first comparison result.
Further, the first determination submodule includes:
the first judgment unit is used for judging whether the bus voltage is greater than or equal to the maximum shunt voltage or not and whether the difference value between any two shunt voltages is smaller than a preset first threshold value or not;
and the first determining unit is used for determining that the connected state of the boost chopper circuit is disconnected if the bus voltage is less than the maximum shunt voltage or the difference value between the two shunt voltages is greater than a preset first threshold value.
Further, the BOOST chopper circuit comprises a plurality of BOOST sub-circuits; the first obtaining module comprises:
the second obtaining submodule is used for obtaining state parameters of input current of each BOOST sub-circuit when the BOOST chopper circuit operates;
the first determining module includes:
and the second determination submodule is used for determining the connection state of the boost chopper circuit according to each input current.
Further, the second determination submodule includes:
the second judging unit is used for acquiring a minimum current value and judging whether each input current is continuously smaller than the minimum current value;
and the second determining unit is used for determining that the connected state of the BOOST sub-circuit is not connected if the BOOST sub-circuit with the input current continuously smaller than the minimum current value exists.
Further, the second determination unit includes:
the first judgment subunit is configured to judge, for a single input current, whether the input currents are all smaller than the minimum current value within a preset time or within a time when a variation amplitude of the output power reaches a preset amplitude;
and the first determining subunit is used for determining that the input current is continuously smaller than the minimum current value if the input current is smaller than the minimum current value within a preset time or within a time when the variation amplitude of the output power reaches a preset amplitude.
Further, the second determination submodule includes:
the first acquisition unit is used for acquiring a maximum current difference value and judging whether the difference value between any two input currents is smaller than the maximum current difference value;
the first execution unit is used for taking the smaller input current of the two input currents with the difference value larger than the maximum current difference value as a first input current if the difference value between the two input currents is larger than the maximum current difference value;
and the third determining unit is used for determining that the connection state of the BOOST sub-circuit corresponding to the first input current is poor contact.
It should be noted here that the modules described above are the same as the examples and application scenarios implemented by the corresponding steps, but are not limited to the disclosure of the above embodiments. The modules may be implemented by software as part of the apparatus, or may be implemented by hardware, where the hardware environment includes a network environment.
Referring to fig. 3, the electronic device may include components such as a communication module 10, a memory 20, and a processor 30 in a hardware structure. In the electronic device, the processor 30 is connected to the memory 20 and the communication module 10, respectively, the memory 20 stores thereon a computer program, which is executed by the processor 30 at the same time, and when executed, implements the steps of the above-mentioned method embodiments.
The communication module 10 may be connected to an external communication device through a network. The communication module 10 may receive a request from an external communication device, and may also send a request, an instruction, and information to the external communication device, where the external communication device may be other electronic devices, a server, or an internet of things device, such as a television.
The memory 20 may be used to store software programs as well as various data. The memory 20 may mainly include a program storage area and a data storage area, where the program storage area may store an operating system, an application program required by at least one function (for example, obtaining a state parameter of the boost chopper circuit), and the like; the storage data area may include a database, and the storage data area may store data or information created according to use of the system, or the like. Further, the memory 20 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.
The processor 30, which is a control center of the electronic device, connects various parts of the entire electronic device using various interfaces and lines, and performs various functions of the electronic device and processes data by operating or executing software programs and/or modules stored in the memory 20 and calling data stored in the memory 20, thereby integrally monitoring the electronic device. Processor 30 may include one or more processing units; alternatively, the processor 30 may integrate an application processor, which primarily handles operating systems, user interfaces, applications, etc., and a modem processor, which primarily handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 30.
Although not shown in fig. 3, the electronic device may further include a circuit control module, which is connected to a power supply to ensure the normal operation of other components. Those skilled in the art will appreciate that the electronic device configuration shown in fig. 3 does not constitute a limitation of the electronic device and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
The invention also proposes a computer-readable storage medium on which a computer program is stored. The computer-readable storage medium may be the Memory 20 in the electronic device in fig. 3, and may also be at least one of a ROM (Read-Only Memory)/RAM (Random Access Memory), a magnetic disk, and an optical disk, where the computer-readable storage medium includes instructions for enabling a terminal device (which may be a television, an automobile, a mobile phone, a computer, a server, a terminal, or a network device) having a processor to execute the method according to the embodiments of the present invention.
In the present invention, the terms "first", "second", "third", "fourth" and "fifth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and those skilled in the art can understand the specific meanings of the above terms in the present invention according to specific situations.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although the embodiment of the present invention has been shown and described, the scope of the present invention is not limited thereto, it should be understood that the above embodiment is illustrative and not to be construed as limiting the present invention, and that those skilled in the art can make changes, modifications and substitutions to the above embodiment within the scope of the present invention, and that these changes, modifications and substitutions should be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. An inversion system connectivity detection method, wherein the inversion system comprises a boost chopper circuit, the method comprising:
acquiring state parameters of the inverter system;
determining the connection state of the boost chopper circuit according to the state parameters;
and adjusting the working mode of the inverter system according to the communication state.
2. The inverter system connectivity detection method of claim 1, wherein the BOOST chopper circuit comprises a plurality of BOOST sub-circuits; the step of obtaining the state parameters of the inverter system comprises:
if a starting instruction is received, acquiring state parameters including bus voltage and shunt circuit voltage of each BOOST sub-circuit;
the step of determining the connection state of the boost chopper circuit according to the state parameter includes:
obtaining a first comparison result by comparing the bus voltage with the shunt voltage of each BOOST sub-circuit;
and determining the connection state of the boost chopper circuit according to the first comparison result.
3. The inverter system connectivity detection method according to claim 2, wherein the step of determining the connection state of the boost chopper circuit according to the first comparison result comprises:
judging whether the bus voltage is greater than or equal to the maximum shunt voltage or not, and whether the difference value between any two shunt voltages is smaller than a preset first threshold value or not;
if the bus voltage is smaller than the maximum shunt voltage, or the difference value between the two shunt voltages is larger than a preset first threshold value, the boost chopper circuit is not connected in the connected state.
4. The inverter system connectivity detection method of claim 1, wherein the BOOST chopper circuit comprises a plurality of BOOST sub-circuits; the step of obtaining the state parameters of the inverter system comprises:
when the inverter system runs, acquiring state parameters of input current of each BOOST sub-circuit;
the step of determining the connection state of the boost chopper circuit according to the state parameter includes:
and determining the connection state of the boost chopper circuit according to each input current.
5. The inverter system connectivity detection method according to claim 4, wherein the step of determining the connection state of the boost chopper circuit according to each of the input currents comprises:
acquiring a minimum current value, and judging whether each input current is continuously smaller than the minimum current value;
and if the BOOST sub-circuit with the input current continuously smaller than the minimum current value exists, the connected state of the BOOST sub-circuit is not connected.
6. The inverter system connectivity detection method according to claim 5, wherein the step of determining whether the determination condition is met comprises:
aiming at a single input current, judging whether the input current is smaller than the minimum current value within a preset time or within the time when the variation amplitude of the output power reaches a preset amplitude;
if the input current is smaller than the minimum current value within the preset time or the time when the variation amplitude of the output power reaches the preset amplitude, the input current is continuously smaller than the minimum current value.
7. The inverter system connectivity detection method according to claim 4, wherein the step of determining the connection state of the boost chopper circuit according to each of the input currents comprises:
acquiring a maximum current difference value, and judging whether the difference value between any two input currents is smaller than the maximum current difference value;
if the difference value between the two input currents is larger than the maximum current difference value, the smaller input current in the two input currents with the difference value larger than the maximum current difference value is used as a first input current;
the connected state of the BOOST sub-circuit corresponding to the first input current is poor contact.
8. An inverter system connectivity detection apparatus, comprising:
the first acquisition module is used for acquiring state parameters of the inverter system;
the first determining module is used for determining the connection state of the boost chopper circuit according to the state parameter;
and the first execution module is used for adjusting the working mode of the inverter system according to the communication state.
9. An electronic device, characterized in that the electronic device comprises a memory, a processor and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the inversion system connectivity detection method according to any one of claims 1 to 7.
10. A computer-readable storage medium, having stored thereon a computer program which, when being executed by a processor, carries out the steps of the inverter system connectivity detection method according to any one of claims 1 to 7.
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