CN115241966B - Variable frequency control method, device and system - Google Patents
Variable frequency control method, device and system Download PDFInfo
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- CN115241966B CN115241966B CN202210700575.9A CN202210700575A CN115241966B CN 115241966 B CN115241966 B CN 115241966B CN 202210700575 A CN202210700575 A CN 202210700575A CN 115241966 B CN115241966 B CN 115241966B
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/062—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for AC powered loads
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
- H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
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- Dc-Dc Converters (AREA)
- Inverter Devices (AREA)
Abstract
The disclosure provides a variable frequency control method, device and system, relates to the technical field of computers, and particularly relates to the technical field of automatic control. The frequency conversion control method is used for a frequency converter and comprises the following steps: determining a target direct current power supply for supplying power to the frequency converter from at least two paths of direct current power supplies based on the acquired state information of the at least two paths of direct current power supplies; determining a regulation signal of the frequency converter based on the state information of the target direct current power supply; based on the regulation signal, the frequency converter is controlled to output a frequency conversion control signal. The frequency conversion control method provided by the disclosure can adopt two paths of direct current power supplies for power supply, and has the advantages of simple structure, convenience in control, less potential safety hazard and low loss.
Description
Technical Field
The disclosure relates to the technical field of computers, in particular to the technical field of automatic control, and particularly relates to a variable frequency control method, device and system.
Background
The fan and water pump loads used in the data center commonly adopt a frequency conversion mode, and double power supplies are needed to supply power to ensure continuous operation of important loads.
Two paths of power supplies in the existing power distribution system need to supply power to the frequency converter through a plurality of hardware devices such as a switching device and a circuit breaker, and then the frequency converter supplies power to a load, and the two paths of power supplies only can support an alternating current power supply.
Disclosure of Invention
The invention provides a variable frequency control method, a variable frequency control device and a variable frequency control system, which can adopt two paths of direct current power supplies for power supply, and have the advantages of simple structure, convenient control, less potential safety hazard and low loss.
According to a first aspect of the present disclosure, there is provided a frequency conversion control method for a frequency converter, including:
determining a target direct current power supply for supplying power to the frequency converter from at least two paths of direct current power supplies based on the acquired state information of the at least two paths of direct current power supplies;
determining a regulation signal of the frequency converter based on the state information of the target direct current power supply;
based on the regulation signal, the frequency converter is controlled to output a frequency conversion control signal.
According to a second aspect of the present disclosure, there is provided a frequency conversion control apparatus for a frequency converter, including:
the first determining module is configured to determine one target direct current power supply for supplying power to the frequency converter from at least two paths of direct current power supplies based on the acquired state information of the at least two paths of direct current power supplies;
the second determining module is configured to determine a regulation signal of the frequency converter based on the state information of the target direct current power supply;
and the control module is configured to control the frequency converter to output a variable frequency control signal based on the regulation signal.
According to a third aspect of the present disclosure, there is provided a variable frequency control system comprising:
the frequency converter is used for outputting a frequency conversion control signal based on the regulation signal;
at least two paths of direct current power supplies are used for supplying power to the frequency converter;
the power supply switching device is used for controlling the target direct-current power supply to supply power to the frequency converter based on the power supply switching signal;
the frequency conversion control device is used for determining one target direct current power supply for supplying power to the frequency converter from at least two paths of direct current power supplies based on the acquired state information of the at least two paths of direct current power supplies and outputting a power supply switching signal to the power supply switching device; the control signal of the frequency converter is determined based on the state information of the target direct current power supply, and the control signal is output to the frequency converter;
the power supply switching device comprises a power supply switching device, a controller, a first output end and a second output end, wherein at least two paths of direct current power supplies are connected with a first input end of the power supply switching device, an output end of the power supply switching device is connected with a first input end of the frequency converter, a first output end of the controller is connected with a second input end of the power supply switching device, and a second output end of the controller is connected with a second input end of the frequency converter.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the disclosure, nor is it intended to be used to limit the scope of the disclosure. Other features of the present disclosure will become apparent from the following specification.
Drawings
The drawings are for a better understanding of the present solution and are not to be construed as limiting the present disclosure. Wherein:
FIG. 1 illustrates a flowchart of a first embodiment of a variable frequency control method according to the present disclosure;
FIG. 2 illustrates a schematic diagram of one application scenario of a variable frequency control method according to the present disclosure;
FIG. 3 shows a flow chart of a second embodiment of a variable frequency control method according to the present disclosure;
FIG. 4 shows a flow chart of a third embodiment of a variable frequency control method according to the present disclosure;
FIG. 5 shows a flowchart of a fourth embodiment of a variable frequency control method according to the present disclosure;
FIG. 6 illustrates a schematic diagram of one embodiment of a variable frequency control device according to the present disclosure;
fig. 7 shows a schematic structural diagram of one embodiment of a variable frequency control system according to the present disclosure.
Detailed Description
Exemplary embodiments of the present disclosure are described below in conjunction with the accompanying drawings, which include various details of the embodiments of the present disclosure to facilitate understanding, and should be considered as merely exemplary. Accordingly, one of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the present disclosure. Also, descriptions of well-known functions and constructions are omitted in the following description for clarity and conciseness.
It should be noted that, without conflict, the embodiments of the present disclosure and features of the embodiments may be combined with each other. The present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
The loads such as fans, water pumps and the like equipped with continuous operation equipment such as a data center and the like commonly adopt variable frequency regulation and control, so that two paths of power supplies are often equipped for supplying power to ensure continuous and stable operation of the loads, and a double-power supply switching device is used in a power distribution system of the double-power supply switching device.
In the current power distribution system, two paths of power supplies supply power to a frequency converter through an ATS (Automatic Transfer Switch ) dual-power switching device or through a plurality of hardware such as a large number of contactors, and then the frequency converter supplies power to a load. In addition, in a related power distribution system, two paths of power supplies can only support an alternating current power supply, and if the direct current power supply is adopted for power supply, inverter equipment is added to supply power to the frequency converter, so that a load works normally; and the switching of the two paths of power supplies cannot realize uninterrupted switching.
Therefore, the existing power distribution system for variable-frequency regulation and control loads is complex in structure, high in energy consumption, multiple in fault points and high in potential safety hazard.
The frequency conversion control method is used for the frequency converter, can directly supply power through two paths of direct current power supplies, and is simple in structure, convenient to control, few in potential safety hazard and low in loss. By utilizing the frequency conversion control method, the frequency conversion control of the speed regulation equipment such as a fan and a water pump or other frequency conversion regulation equipment can be realized through the frequency converter, the control convenience and the operation stability of the speed regulation equipment such as the fan and the water pump or other frequency conversion regulation equipment are ensured, and the reliability is improved.
It should be noted that, in the embodiment of the present disclosure, the frequency converter is a dc frequency converter, that is, the frequency converter may be directly powered by a dc power supply, without performing processes such as rectification and inversion on an electrical signal supplied by the power supply, and may directly perform frequency conversion processes such as voltage boosting or voltage reducing on an accessed power supply signal. The specific structure of the frequency converter may refer to the related art, and is not specifically limited herein.
Fig. 1 illustrates a flow 100 of one embodiment of a variable frequency control method of the present disclosure, with reference to fig. 1, comprising the steps of:
step S101, determining a target direct current power supply for supplying power to the frequency converter from at least two direct current power supplies based on the acquired state information of the at least two direct current power supplies.
In this embodiment, the execution body of the frequency conversion control method may determine, from the at least two paths of dc power supplies, a path of target dc power supply for supplying power to the frequency converter based on the acquired state information of the at least two paths of dc power supplies.
The execution body may be a controller, for example, an MCU (Microcontroller Unit, micro control unit) or the like.
The at least two paths of direct current power supplies can be two paths of direct current power supplies, three paths of direct current power supplies or more paths of direct current power supplies according to actual power distribution conditions. And the execution main body determines one path of target direct current power supply for supplying power to the frequency converter according to the state information of the at least two paths of direct current power supplies.
In some optional implementations of the embodiments of the present disclosure, the status information of the at least two dc power sources includes a remaining power and/or an output voltage of the at least two dc power sources.
The executing body obtains the residual electric quantity of at least two paths of direct current power supplies, and determines a path of target direct current power supply from the direct current power supplies with the residual electric quantity meeting the requirement. For example, the dc power supply with the largest remaining power may be preferentially determined as the target dc power supply.
The executing body may also obtain output voltages of at least two paths of direct current power supplies, and determine a path of target direct current power supply from the direct current power supplies with the output voltages greater than or equal to the required voltage. For example, the dc power source having the largest output voltage or the dc power source having the output voltage closest to the required voltage may be preferentially determined as the target dc power source.
In an exemplary embodiment, during the process of supplying power to the frequency converter, one dc power supply of the at least two dc power supplies may acquire state information of the at least two dc power supplies in real time, and if the state information, such as a residual electric quantity, of the currently supplied dc power supply is insufficient to meet the operation requirement of the frequency converter, the target dc power supply is determined from the other dc power supplies. For example, when a total of three direct current power supplies are shared, the target direct current power supply is determined from the other two direct current power supplies.
In an exemplary embodiment, if two dc power supplies are provided, in a process of supplying power to one of the dc power supplies, the executing body may obtain state information of the two dc power supplies at the same time, and determine that the state information is better from the two dc power supplies, for example, the dc power supply with more residual power is the target dc power supply.
In the embodiment of the present disclosure, after the execution body determines the target dc power supply, the state information of the target dc power supply may be determined from the obtained state information of at least two paths of dc power supplies.
In the embodiment of the disclosure, the execution body determines the target direct current power supply according to the state information of at least two paths of direct current power supplies, so that the power supply stability of the target direct current power supply can be effectively ensured, and the stable operation of the frequency converter is further ensured.
It should be noted that in the embodiment of the disclosure, the frequency converter is powered by at least two paths of direct current power supplies, and when the at least two paths of direct current power supplies are switched, uninterrupted switching between the direct current power supplies can be effectively ensured due to no need of rectifying, inverting and other processing on signals output by the direct current power supplies, and uninterrupted power supply to the frequency converter before and after power supply switching is fully ensured.
Step S102, determining a regulation signal of the frequency converter based on the state information of the target direct current power supply.
In this embodiment, the execution body of the frequency conversion control method determines the regulation signal of the frequency converter based on the state information of the target dc power supply in the state information acquired in step S101 according to the target dc power supply determined in step S101.
The execution body determines the regulation signal of the frequency converter according to the residual electric quantity of the target direct current power supply. For example, according to the residual capacity of the target direct current power supply and the preset operation parameter or the current operation parameter of the frequency converter, the regulation signal of the frequency converter is determined.
For example, if the remaining power of the target dc power supply is the first power and is higher than the required power of the frequency converter in the continuous preset operation state, the control signal of the frequency converter may be determined to be in the current operation state. If the residual electric quantity of the target direct-current power supply is the second electric quantity and is lower than the required electric quantity of the frequency converter in the continuous current running state, the input voltage of the frequency converter can be adjusted in order to ensure that the frequency converter can continuously output the frequency conversion control signal, but the running process of the frequency converter is required to be regulated and controlled in order to ensure that the frequency conversion control signal output by the frequency converter is stable, and then the regulation and control signal of the frequency converter is determined.
And if the state information of the target direct current power supply is the output voltage, the execution body determines the regulation signal of the frequency converter according to the output voltage of the target direct current power supply. For example, if the output voltage of the target dc power supply is the first voltage and is higher than the expected required voltage for the operation of the frequency converter, the control signal of the frequency converter may be determined to be in the current operation state; if the output voltage of the target direct current power supply is the second voltage and is lower than the required voltage of the frequency converter running in the current running state, the frequency converter is regulated and controlled to output an output signal in the current running state by the input voltage lower than the second voltage.
In this embodiment, the regulation signal of the frequency converter is determined based on the state information of the target dc power supply, so that the output stability of the frequency converter can be ensured, and the load controlled by the frequency converter can be ensured to stably operate.
Step S103, based on the regulation signal, the frequency converter is controlled to output a frequency conversion control signal.
In this embodiment, the execution body of the frequency conversion control method controls the frequency converter to output a frequency conversion control signal based on the regulation signal determined in step S102, so as to perform frequency conversion control on the load controlled by the frequency converter, thereby achieving the expected frequency conversion control effect.
Fig. 2 is a schematic diagram of an application scenario 200 of a frequency conversion control method according to an embodiment of the disclosure. In the application scenario shown in fig. 2, the controller 201 is used as an execution subject to execute the frequency conversion control method, and determines a target dc power supply for supplying power to the dc converter 203 from the first dc power supply 202a and the second dc power supply 202b by acquiring state information of the first dc power supply 202a and the second dc power supply 202 b; for example, if the first dc power supply 202a is determined to be the target dc power supply, the regulation signal of the dc converter 203 is determined based on the state information of the first dc power supply 202 a; based on the regulation signal, the dc converter 203 is controlled to output a variable frequency control signal to control the load 204 to operate. The load 204 may be a speed regulation device such as a water pump, a fan, etc., and may also include other variable frequency regulation devices.
According to the frequency conversion control method provided by the embodiment of the disclosure, at least two paths of direct current power supplies can be directly applied, a target direct current power supply for supplying power to the frequency converter can be determined according to the state information of the at least two paths of direct current power supplies, the regulation and control signal of the frequency converter is determined according to the state information of the target direct current power supply, and the frequency conversion control signal is further controlled to be output by the frequency converter, so that the expected frequency conversion control effect is achieved. The embodiment of the disclosure can be directly applied to a direct current power supply, and structures such as an inverter are not needed, so that the control is convenient, the power supply structure of a load controlled by a frequency converter can be greatly simplified, fault points are reduced, potential safety hazards are reduced, and energy consumption is reduced; and the regulation and control signal of the frequency converter is determined based on the state information of the target direct current power supply, so that the output stability of the frequency converter can be ensured, and the stable operation of a load can be ensured.
Fig. 3 shows a flow 300 of a second embodiment of the variable frequency control method of the present disclosure. Referring to fig. 3, the variable frequency control method includes the steps of:
step S301, obtaining state information of at least two paths of direct current power supplies;
in this embodiment, an execution body of the variable frequency control method obtains state information of at least two paths of direct current power supplies. The executing body acquires state information of all direct current power supplies which can supply power for the frequency converter.
The state information of the direct current power supply comprises state information such as the current residual capacity and/or output voltage of the direct current power supply.
In this embodiment, the executing body obtains status information of at least two paths of dc power sources, and can determine the current status of each path of dc power source in real time, so as to determine whether each path of power source can be used to supply power to the frequency converter, so as to ensure stable operation of the frequency converter.
Step S302, obtaining power supply demand information of a frequency converter;
in this embodiment, the execution body of the frequency conversion control method obtains the power supply requirement information of the frequency converter.
The power supply requirement information of the frequency converter is power supply information required by stable operation of the frequency converter. For example, a power supply voltage that the inverter needs to input to maintain a current operating state, and the like.
Step S303, determining a target direct current power supply according to the state information and the power demand information.
In this embodiment, the execution body of the frequency conversion control method determines the target dc power supply according to the state information of at least two paths of dc power supplies obtained in step S301 and the power demand information of the frequency converter obtained in step S302.
The executing body determines whether the state information of the at least two paths of direct current power supplies meets the power supply requirement of the frequency converter according to the state information of the at least two paths of direct current power supplies and the power supply requirement information of the frequency converter, and determines one path of target direct current power supply from the direct current power supplies of which the state information meets the power supply requirement of the frequency converter.
For example, if the state information of two or more dc power supplies of the at least two dc power supplies meets the power supply requirement of the frequency converter, for example, the remaining power of each dc power supply meeting the requirement is greater than or equal to the required power in the power supply requirement information of the frequency converter, and for another example, the output voltage of each dc power supply meeting the requirement is greater than or equal to the required voltage in the power supply requirement information of the frequency converter, at this time, one dc power supply may be randomly determined from the at least two dc power supplies meeting the power supply requirement of the frequency converter as the target dc power supply, and the dc power supply with the optimal or worst state information may also be determined from the at least two dc power supplies meeting the power supply requirement of the frequency converter as the target dc power supply.
For example, if the state information of only one dc power supply of the at least two dc power supplies satisfies the power supply requirement of the frequency converter, that is, only the remaining power of the one dc power supply is greater than or equal to the required power in the power supply requirement information of the frequency converter, or only the output voltage of the one dc power supply is greater than or equal to the required voltage in the power supply requirement information of the frequency converter, the one dc power supply is determined to be the target dc power supply.
It should be noted that, in the embodiment of the present disclosure, after the execution body determines the target dc power supply, the state information of the target dc power supply may be determined from the state information of at least two paths of dc power supplies obtained in step S301.
Step S304, determining a regulation signal of the frequency converter based on the state information of the target direct current power supply.
In this embodiment, the execution body of the frequency conversion control method determines the regulation signal of the frequency converter based on the state information of the target dc power supply determined in step S303.
Step S304 is substantially identical to step S102 of the embodiment shown in fig. 1, and the detailed implementation may refer to the foregoing description of step S102, which is not repeated herein.
Step S305, based on the regulation signal, controls the frequency converter to output a frequency conversion control signal.
In this embodiment, the execution body of the frequency conversion control method controls the frequency converter to output a frequency conversion control signal based on the regulation signal determined in step S304.
Step S305 is substantially identical to step S103 in the embodiment shown in fig. 1, and the detailed implementation may refer to the foregoing description of step S103, which is not repeated herein.
According to the frequency conversion control method provided by the embodiment of the disclosure, the target direct current power supply is determined according to the state information of at least two paths of direct current power supplies and the power supply demand information of the frequency converter, so that the target direct current power supply can be ensured to meet the operation demand of the frequency converter, the frequency converter is ensured to stably operate, and the expected frequency conversion control effect is realized.
Fig. 4 shows a flow 400 of a third embodiment of the variable frequency control method of the present disclosure. Referring to fig. 4, the variable frequency control method includes the steps of:
step S401, determining a target direct current power supply for supplying power to the frequency converter from the two direct current power supplies based on the acquired state information of the at least two direct current power supplies.
In this embodiment, the execution body of the frequency conversion control method determines, based on the obtained state information of at least two paths of dc power supplies, a path of target dc power supply for supplying power to the frequency converter from the two paths of dc power supplies.
Step S401 is substantially identical to step S101 of the embodiment shown in fig. 1 or steps S301 to S303 shown in fig. 3, and the detailed implementation may refer to the foregoing description of step S101 or steps S301 to S303, which are not repeated herein.
Step S402, an external input signal is received.
In this embodiment, the execution body of the frequency conversion control method receives an external input signal.
In some alternative implementations of embodiments of the present disclosure, the external input signal may include a variable frequency feedback signal and/or a user input signal.
The variable frequency feedback signal is a signal fed back by variable frequency equipment controlled by a frequency converter. For example, in the variable frequency control method, a variable frequency control signal output by a frequency converter controls the operation of a water pump or a fan, and the variable frequency feedback signal carries current operation state information fed back by the water pump or the fan in operation.
The external input signal may also include a user input signal, for example. The user input signal may include a frequency modulation signal of a user for an expected control state of a frequency conversion device currently controlled by the frequency converter, for example, the user input signal carries device information (such as a device type, a device model, etc.) of the frequency conversion device, expected operation state information (such as parameter information of expected operation power, rotation speed, duration, etc.) of the device, etc.; the control signal of the new up-conversion device and the expected state thereof, for example, the user input signal carries the device information of the new up-conversion device, the expected operation time length, the rotating speed, the flow or the power of the new up-conversion device and other parameter information.
Step S403, determining the regulation signal of the frequency converter according to the external input signal and the state information of the target DC power supply.
In this embodiment, the execution body of the frequency conversion control method determines the regulation signal of the frequency converter based on the external input signal received in step S402 and in combination with the state information of the target dc power supply determined in step S401.
Illustratively, the executing body determines the regulation signal of the frequency converter according to the state information of the target direct current power supply, the received frequency conversion feedback signal and/or the user input signal.
For example, when the operation state of the frequency conversion device currently controlled by the frequency converter is determined to be lower than the expected state according to the actual operation information carried in the received frequency conversion feedback signal, for example, the flow of the water pump is smaller than the expected flow, and then, for example, the rotating speed of the fan is smaller than the expected rotating speed, the executing body determines the regulation signal of the frequency converter according to the actual operation information and the state information of the target direct current power supply, so that the frequency conversion control signal output by the frequency converter after regulation can control the frequency conversion device to reach the expected operation state or approach the expected operation state infinitely.
For another example, when receiving the variable frequency feedback signal and the frequency modulation signal input by the user, the executing body performs comprehensive judgment according to the frequency modulation signal input by the user and the received variable frequency feedback signal in combination with the state information of the target direct current power supply, and determines the regulation signal of the frequency converter.
Step S404, based on the regulation signal, the frequency converter is controlled to output a frequency conversion control signal.
In this embodiment, the execution body of the frequency conversion control method controls the frequency converter to output a frequency conversion control signal based on the regulation signal determined in step S403.
Step S404 is substantially identical to step S103 in the embodiment shown in fig. 1, and the detailed implementation may refer to the foregoing description of step S103, which is not repeated herein.
In the embodiment of the disclosure, the variable frequency control method is based on the state information of the target direct current power supply, and the regulation and control signals of the frequency converter are determined by combining external input signals such as the variable frequency feedback signals, the user input signals and the like, so that the variable frequency control signals output by the frequency converter can control the variable frequency equipment to approach the expected running state infinitely, the variable frequency control requirements are met to the greatest extent, and the stable running of the frequency converter and the variable frequency equipment is ensured.
Fig. 5 shows a flow 500 of a fourth embodiment of the variable frequency control method of the present disclosure, which, referring to fig. 5, comprises the steps of:
step S501, determining a target dc power supply for supplying power to the frequency converter from the two dc power supplies based on the obtained state information of the at least two dc power supplies.
In this embodiment, the execution body of the frequency conversion control method determines, based on the obtained state information of at least two paths of dc power supplies, a path of target dc power supply for supplying power to the frequency converter from the two paths of dc power supplies.
Step S501 is substantially identical to step S101 of the embodiment shown in fig. 1 or steps S301-S303 of the embodiment shown in fig. 3, and the detailed implementation may refer to the foregoing description of step S101 or steps S301-S303, which is not repeated herein.
Step S502, determining a regulation signal of the frequency converter based on the state information of the target direct current power supply.
In this embodiment, the execution body of the frequency conversion control method determines the regulation signal of the frequency converter based on the state information of the target dc power supply.
Step S502 is substantially identical to step S102 of the embodiment shown in fig. 1 or steps S402-S403 of the embodiment shown in fig. 4, and the detailed implementation may refer to the foregoing description of step S102 or steps S402-S403, which is not repeated here.
Step S503, based on the regulation signal, controls the frequency converter to output a frequency conversion control signal.
In this embodiment, the execution body of the frequency conversion control method controls the frequency converter to output a frequency conversion control signal based on the regulation signal determined in step S502.
Step S503 is substantially identical to step S103 in the embodiment shown in fig. 1, and the specific implementation may refer to the foregoing description of step S103, which is not repeated herein.
Step S504, determining whether a fault occurs based on the acquired operation signal; the operating signal comprises a first operating signal of the frequency converter and/or a second operating signal of the frequency conversion device controlled by the frequency converter.
In this embodiment, the execution body of the variable frequency control method is further configured to acquire an operation signal, and determine whether a fault occurs based on the operation signal.
The executing body can acquire a first operation signal of the frequency converter and can also acquire a second operation signal of frequency conversion equipment controlled by the frequency converter.
The execution body can determine whether the frequency converter fails based on the first operation signal or not, and can determine whether the frequency conversion equipment controlled by the frequency converter fails based on the second operation signal or not.
That is, in the embodiment of the present disclosure, the execution body may monitor whether the operation state of the frequency converter is normal or not, and may monitor whether the operation state of the frequency conversion device of the frequency conversion control is normal or not.
In step S505, in response to determining that the fault occurs, determining the type of alert corresponding to the fault and alerting.
In this embodiment, the execution body of the variable frequency control method determines, in response to determining that a fault occurs, a warning type corresponding to the fault and performs warning.
When the execution body determines that a fault occurs in step S504, the execution body further determines a warning type corresponding to the fault, and alerts based on the warning type. For example, the alarm type may be selected according to the fault type or the fault level, and for example, the alarm type may include a pop-up window alarm, an audio alarm, an acousto-optic alarm, and power off.
In an exemplary embodiment, the executing body determines that the frequency converter has a slight fault in step S504, but does not affect the operation of the frequency converter and the frequency conversion control signal output by the frequency converter, so that the corresponding warning type is determined to be a popup prompt according to the slight fault, and at this time, the executing body may perform the popup prompt at the corresponding terminal or the display interface.
In an exemplary embodiment, the executing body determines, in step S504, that the inverter device controlled by the inverter has a serious fault according to the received operation signal, and when the frequency conversion device fails to operate normally or fails to operate in an expected state, determines, in step S505, that the alarm type corresponding to the serious fault is an alarm (may be an audio alarm or an acousto-optic alarm) and cuts off the power, and at this time, the executing body issues an alarm and cuts off the target dc power according to the determined alarm type.
In the embodiment of the disclosure, in the process of controlling the frequency converter to perform frequency conversion control, the frequency conversion control method can also acquire the operation signals of the frequency converter and the frequency conversion equipment controlled by the frequency converter, determine whether a fault occurs, and determine the type of warning corresponding to the fault and warn when determining that the fault occurs, so that the fault can be found and warned in time, and the operation stability and the operation efficiency of the frequency converter and the frequency conversion equipment controlled by the frequency converter can be effectively ensured.
As an implementation of the method shown in the above figures, fig. 6 shows an embodiment of a variable frequency control device according to the present disclosure. The frequency conversion control device corresponds to the method embodiment shown in fig. 1, and can be applied to various electronic equipment.
As shown in fig. 6, a variable frequency control apparatus 600 of an embodiment of the present disclosure includes: a first determination module 601, a second determination module 602, and a control module 603. The first determining module 601 is configured to determine one target dc power supply for supplying power to the frequency converter from at least two dc power supplies based on the acquired state information of the at least two dc power supplies; the second determining module 602 is configured to determine a regulation signal of the frequency converter based on the state information of the target dc power supply; the control module 603 is configured to control the frequency converter to output a variable frequency control signal based on the regulation signal.
In the variable frequency control device 600 of the present embodiment, the specific processes of the first determining module 601, the second determining module 602, and the control module 603 and the technical effects thereof may refer to the relevant descriptions of steps S101 to S103 in the corresponding embodiment of fig. 1, and are not repeated herein.
In some optional implementations of embodiments of the present disclosure, the first determining module 601 includes: the device comprises a first acquisition sub-module, a second acquisition sub-module and a first determination sub-module. The first acquisition submodule is configured to acquire state information of at least two paths of direct-current power supplies; the second acquisition submodule is configured to acquire power demand information of the frequency converter; the first determination submodule is configured to determine a target direct-current power supply according to the state information and the power demand information.
In this embodiment, in the variable frequency control device 600, the specific processes of the first acquisition sub-module, the second acquisition sub-module and the first determination sub-module and the technical effects thereof may refer to the relevant descriptions of steps S301 to S303 in the corresponding embodiment of fig. 3, and are not repeated herein.
In some optional implementations of embodiments of the present disclosure, the status information includes a remaining power and/or an output voltage.
In some optional implementations of embodiments of the present disclosure, the second determining module 602 includes: a first receiving sub-module and a second determining sub-module. Wherein the first receiving sub-module is configured to receive an external input signal; the second determining submodule is configured to determine a regulation signal of the frequency converter according to the external input signal and the state information of the target direct-current power supply.
In this embodiment, in the variable frequency control device 600, the specific processes of the first receiving sub-module and the second determining sub-module and the technical effects thereof may refer to the descriptions related to steps S402-S403 in the corresponding embodiment of fig. 4, and are not repeated here.
In some alternative implementations of embodiments of the present disclosure, the external input signal includes a variable frequency feedback signal and/or a user input signal.
In some optional implementations of the embodiments of the present disclosure, the variable frequency control apparatus further includes: the third determination module and the fourth determination module. Wherein the third determining module is configured to determine whether a fault occurs based on the acquired operation signal; the operation signals comprise a first operation signal of the frequency converter and/or a second operation signal of the frequency conversion equipment controlled by the frequency converter; the fourth determining module is configured to determine a warning type corresponding to the fault and warn in response to determining that the fault occurs.
In the variable frequency control device of the present embodiment, the specific processes of the third determining module and the fourth determining module and the technical effects thereof may refer to the descriptions related to steps S504-S505 in the corresponding embodiment of fig. 5, and are not repeated herein.
As an application to the method and apparatus shown in the above figures, the present disclosure also provides a variable frequency control system. Fig. 7 shows a schematic structural diagram of an embodiment of a variable frequency control system 700 according to the present disclosure, in which the variable frequency control system 700 includes a frequency converter 701, at least two dc power supplies 702, a power switching device 703, and a variable frequency control device 704. The variable frequency control device 704 corresponds to the method embodiments shown in fig. 1 and 3-5.
Referring to fig. 7, the frequency converter 701 is configured to output a variable frequency control signal based on the regulation signal; at least two dc power supplies 702 are used to supply power to the frequency converter; the power supply switching device 703 is used for controlling the target direct current power supply to supply power to the frequency converter based on the power supply switching signal; the frequency conversion control device 704 is configured to determine a target dc power supply for supplying power to the frequency converter from the at least two dc power supplies based on the acquired state information of the at least two dc power supplies, and output a power switching signal to the power switching device; and the control signal of the frequency converter is determined based on the state information of the target direct current power supply, and the control signal is output to the frequency converter.
Wherein, at least two paths of direct current power supplies 702 are connected with a first input end of the power supply switching device 703, an output end of the power supply switching device 703 is connected with a first input end of the frequency converter 701, a first output end of the frequency conversion control device 704 is connected with a second input end of the power supply switching device 703, and a second output end of the frequency conversion control device 704 is connected with a second input end of the frequency converter 701.
In the variable frequency control system of the embodiment of the present disclosure, the power supply switching device 703 switches at least two paths of direct current power supplies 702 under the control of the variable frequency control device 704; the frequency converter 701 is powered by the target dc power source switched by the power switching device 703, and operates under the control of the regulation signal determined by the frequency conversion control device 704. The specific processing of the variable frequency control device 704 and the technical effects thereof may refer to the description of step 101 in the corresponding embodiment of fig. 1, which is not repeated herein.
In some optional implementations of the embodiments of the present disclosure, the frequency conversion control device 704 is configured to obtain status information of at least two paths of dc power sources, obtain power requirement information of the frequency converter, and determine the target dc power source according to the status information and the power requirement information.
In the variable frequency control system 700 of the present embodiment, the specific processing of the variable frequency control device 704 and the technical effects thereof can refer to the related descriptions of steps S301-S303 in the corresponding embodiment of fig. 3, and are not repeated here.
In some optional implementations of embodiments of the present disclosure, the status information includes a remaining power and/or an output voltage.
In some optional implementations of the embodiments of the present disclosure, the frequency conversion control device 704 is further configured to receive an external input signal, and determine a regulation signal of the frequency converter according to the external input signal and state information of the target dc power supply.
In the variable frequency control system 700 of the present embodiment, the specific processing of the variable frequency control device 704 and the technical effects thereof can refer to the related descriptions of steps S402-S403 in the corresponding embodiment of fig. 4, and are not repeated here.
In some alternative implementations of embodiments of the present disclosure, the external input signal includes a variable frequency feedback signal and/or a user input signal.
In some optional implementations of embodiments of the present disclosure, the frequency conversion control device 704 is further configured to determine whether a fault occurs based on the acquired operation signal, where the operation signal includes a first operation signal of the frequency converter and/or a second operation signal of the frequency conversion device controlled by the frequency converter; and responding to the determined faults, determining the warning types corresponding to the faults and warning.
In the variable frequency control system 700 of the present embodiment, the specific processing of the variable frequency control device 704 and the technical effects thereof can refer to the related descriptions of steps S504-S505 in the corresponding embodiment of fig. 5, and are not repeated here.
It should be noted that, in the variable frequency control system 700 of the embodiment of the present disclosure, the input and output of the frequency converter 701 and the frequency conversion device may be manually controlled by the variable frequency control device 704, for example, by receiving a user input signal of the external input signals; automatic control operations may also be performed, for example, automatically receiving variable frequency feedback signals; and the remote control operation can be performed, for example, the remote control can be realized through communication modes such as a network port or a 485 bus.
Various implementations of the systems and techniques described here above may be implemented in digital electronic circuitry, integrated circuit systems, field Programmable Gate Arrays (FPGAs), application Specific Integrated Circuits (ASICs), application Specific Standard Products (ASSPs), systems On Chip (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs, the one or more computer programs may be executed and/or interpreted on a programmable system including at least one programmable processor, which may be a special purpose or general-purpose programmable processor, that may receive data and instructions from, and transmit data and instructions to, a storage system, at least one input device, and at least one output device.
Program code for carrying out methods of the present disclosure may be written in any combination of one or more programming languages. These program code may be provided to a processor or controller of a general purpose computer, special purpose computer, or other programmable data processing apparatus such that the program code, when executed by the processor or controller, causes the functions/operations specified in the flowchart and/or block diagram to be implemented. The program code may execute entirely on the machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.
In the context of this disclosure, a machine-readable medium may be a tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. The machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. The machine-readable medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
To provide for interaction with a user, the systems and techniques described here can be implemented on a computer having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user; and a keyboard and pointing device (e.g., a mouse or trackball) by which a user can provide input to the computer. Other kinds of devices may also be used to provide for interaction with a user; for example, feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form, including acoustic input, speech input, or tactile input.
The systems and techniques described here can be implemented in a computing system that includes a background component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front-end component (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such background, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local Area Networks (LANs), wide Area Networks (WANs), and the internet.
The computer system may include a client and a server. The client and server are typically remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server may be a cloud server, a server of a distributed system, or a server incorporating a blockchain.
It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps recited in the present disclosure may be performed in parallel or sequentially or in a different order, provided that the desired results of the technical solutions of the present disclosure are achieved, and are not limited herein.
The above detailed description should not be taken as limiting the scope of the present disclosure. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present disclosure are intended to be included within the scope of the present disclosure.
Claims (15)
1. A frequency conversion control method for a frequency converter, comprising:
determining one path of target direct current power supply for supplying power to the frequency converter from at least two paths of direct current power supplies based on the acquired state information of the at least two paths of direct current power supplies, wherein the state information comprises residual electric quantity and output voltage, and the at least two paths of direct current power supplies supply power to the frequency converter uninterruptedly before and after switching the target direct current power supplies;
determining a regulation signal of the frequency converter based on the state information of the target direct current power supply, including: regulating and controlling the frequency converter to keep the current running state in response to the residual electric quantity of the target direct current power supply being higher than the required electric quantity of the frequency converter in the continuous preset running state or the output voltage of the target direct current power supply being higher than the required voltage of the frequency converter in the continuous preset running state; in response to the residual electric quantity of the target direct current power supply being lower than the required electric quantity of the frequency converter in the continuous current running state or the output voltage of the target direct current power supply being lower than the required voltage of the frequency converter in the continuous current running state, regulating the frequency converter to output an output signal in the current running state at an input voltage lower than the output voltage of the target direct current power supply;
And controlling the frequency converter to output a variable frequency control signal based on the regulation signal.
2. The variable frequency control method according to claim 1, wherein determining a target dc power supply for supplying power to the frequency converter from the at least two dc power supplies based on the acquired state information of the at least two dc power supplies, includes:
acquiring state information of the at least two paths of direct current power supplies;
acquiring power supply demand information of the frequency converter;
and determining the target direct current power supply according to the state information and the power supply demand information.
3. The variable frequency control method according to claim 1, wherein the determining the regulation signal of the frequency converter based on the state information of the target dc power supply includes:
receiving an external input signal;
and determining the regulation and control signal of the frequency converter according to the external input signal and the state information of the target direct current power supply.
4. A variable frequency control method according to claim 3, wherein the external input signal comprises a variable frequency feedback signal and/or a user input signal.
5. The variable frequency control method according to claim 1, further comprising:
determining whether a fault occurs based on the acquired operation signal; the operation signals comprise a first operation signal of the frequency converter and/or a second operation signal of frequency conversion equipment controlled by the frequency converter;
And responding to the determination of the occurrence of the fault, determining the warning type corresponding to the fault and warning.
6. A variable frequency control device for a frequency converter, comprising:
the first determining module is configured to determine one path of target direct current power supply for supplying power to the frequency converter from at least two paths of direct current power supplies based on the acquired state information of the at least two paths of direct current power supplies, wherein the state information comprises residual electric quantity and output voltage, and the at least two paths of direct current power supplies supply the frequency converter uninterruptedly before and after switching the target direct current power supplies;
a second determining module configured to determine a regulation signal of the frequency converter based on the state information of the target dc power supply, including: regulating and controlling the frequency converter to keep the current running state in response to the residual electric quantity of the target direct current power supply being higher than the required electric quantity of the frequency converter in the continuous preset running state or the output voltage of the target direct current power supply being higher than the required voltage of the frequency converter in the continuous preset running state; in response to the residual electric quantity of the target direct current power supply being lower than the required electric quantity of the frequency converter in the continuous current running state or the output voltage of the target direct current power supply being lower than the required voltage of the frequency converter in the continuous current running state, regulating the frequency converter to output an output signal in the current running state at an input voltage lower than the output voltage of the target direct current power supply;
And the control module is configured to control the frequency converter to output a frequency conversion control signal based on the regulation signal.
7. The variable frequency control device of claim 6, wherein the first determination module comprises:
the first acquisition submodule is configured to acquire state information of the at least two paths of direct-current power supplies;
the second acquisition submodule is configured to acquire power demand information of the frequency converter;
and the first determining submodule is configured to determine the target direct-current power supply according to the state information and the power demand information.
8. The variable frequency control device of claim 6, wherein the second determination module comprises:
a first receiving sub-module configured to receive an external input signal;
and the second determining submodule is configured to determine a regulating signal of the frequency converter according to the external input signal and the state information of the target direct-current power supply.
9. The variable frequency control device of claim 8, wherein the external input signal comprises a variable frequency feedback signal and/or a user input signal.
10. The variable frequency control device according to claim 6, further comprising:
a third determining module configured to determine whether a fault occurs based on the acquired operation signal; the operation signals comprise a first operation signal of the frequency converter and/or a second operation signal of frequency conversion equipment controlled by the frequency converter;
And the fourth determining module is configured to determine the warning type corresponding to the fault and warn in response to determining that the fault occurs.
11. A variable frequency control system, comprising:
the frequency converter is used for outputting a frequency conversion control signal based on the regulation signal;
at least two paths of direct current power supplies are used for supplying power to the frequency converter;
the power supply switching device is used for controlling a target direct current power supply to supply power to the frequency converter based on a power supply switching signal, and the at least two paths of direct current power supplies supply power to the frequency converter uninterruptedly before and after the target direct current power supply is switched;
the frequency conversion control device is used for determining one target direct current power supply for supplying power to the frequency converter from at least two paths of direct current power supplies based on the acquired state information of the at least two paths of direct current power supplies and outputting a power supply switching signal to the power supply switching device, wherein the state information comprises residual electric quantity and output voltage; the method is also used for determining the regulation and control signal of the frequency converter based on the state information of the target direct current power supply and outputting the regulation and control signal to the frequency converter, and comprises the following steps: regulating and controlling the frequency converter to keep the current running state in response to the residual electric quantity of the target direct current power supply being higher than the required electric quantity of the frequency converter in the continuous preset running state or the output voltage of the target direct current power supply being higher than the required voltage of the frequency converter in the continuous preset running state; in response to the residual electric quantity of the target direct current power supply being lower than the required electric quantity of the frequency converter in the continuous current running state or the output voltage of the target direct current power supply being lower than the required voltage of the frequency converter in the continuous current running state, regulating the frequency converter to output an output signal in the current running state at an input voltage lower than the output voltage of the target direct current power supply;
The power supply switching device comprises a power supply switching device, a frequency conversion control device, a frequency conversion device and at least two paths of direct current power supplies, wherein the at least two paths of direct current power supplies are connected with a first input end of the power supply switching device, an output end of the power supply switching device is connected with a first input end of the frequency converter, a first output end of the frequency conversion control device is connected with a second input end of the power supply switching device, and a second output end of the frequency conversion control device is connected with a second input end of the frequency converter.
12. The variable frequency control system according to claim 11, wherein the variable frequency control device is configured to obtain status information of the at least two paths of dc power sources, obtain power demand information of the frequency converter, and determine the target dc power source according to the status information and the power demand information.
13. The variable frequency control system of claim 11, wherein the variable frequency control device is further configured to receive an external input signal and determine the regulation signal of the frequency converter according to the external input signal and the state information of the target dc power supply.
14. The variable frequency control system of claim 13, wherein the external input signal comprises a variable frequency feedback signal and/or a user input signal.
15. The variable frequency control system of claim 11, wherein the variable frequency control device is further configured to determine whether a fault occurs based on the acquired operation signal, the operation signal including a first operation signal of the frequency converter and/or a second operation signal of a frequency conversion apparatus controlled by the frequency converter; and responding to the determined faults, determining the warning types corresponding to the faults and warning.
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