CN113422420A - Power control method and multi-path control system - Google Patents
Power control method and multi-path control system Download PDFInfo
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- CN113422420A CN113422420A CN202110577326.0A CN202110577326A CN113422420A CN 113422420 A CN113422420 A CN 113422420A CN 202110577326 A CN202110577326 A CN 202110577326A CN 113422420 A CN113422420 A CN 113422420A
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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
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
- H02J7/04—Regulation of charging current or voltage
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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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00304—Overcurrent protection
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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
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The embodiment of the application discloses a power control method and a multi-path control system, the method is applied to the multi-path control system, the multi-path control system comprises a front-stage module and a rear-stage module, the front-stage module is connected with the rear-stage module through a bus, the front-stage module is used for transmitting energy of an input power supply to the bus, the rear-stage module is used for providing power supply voltage for a load according to the voltage on the bus, the method comprises the steps of judging whether the output current of the front-stage module is smaller than a preset current threshold value, if so, keeping the output voltage of the front-stage module to be the preset voltage, if not, limiting the output current of the front-stage module to be smaller than or equal to the preset current threshold value to detect the voltage on the bus, and adjusting the output power of the rear-stage module according to the voltage on the bus. By the mode, the cost of the system can be reduced while the stable work of the system is ensured.
Description
Technical Field
The present disclosure relates to the field of power control technologies, and in particular, to a power control method and a multi-path control system.
Background
For example, in the conventional multi-path charging system, the front module is a rectifier module, the rear module is a charging module, and the load can be stably charged only if the maximum output power of the rectifier module is greater than the maximum output power of the charging module.
However, in the prior art, in order to achieve stable operation of the system, it is usually configured that the maximum output power of the front module is greater than the maximum output power of the rear module in advance, and the front module is further provided with a certain margin of the output power, that is, part of the power of the front module is not used during operation, which results in waste of resources, which not only increases the cost, but also reduces the utilization rate of the whole system. Meanwhile, when the input of the front module is a hybrid energy (i.e., energy including wind energy, solar energy, etc.), the power of the hybrid energy may be changed drastically, so that the system may not output stably, i.e., the stability of the system may be poor.
Disclosure of Invention
The embodiment of the application aims to provide a power control method and a multi-path control system, which can reduce the cost of the system while ensuring the stable operation of the system.
In order to achieve the above object, in a first aspect, the present application provides a power control method applied to a multi-channel control system, where the multi-channel control system includes a front module and a rear module, the front module and the rear module are connected through a bus, the front module is configured to transmit energy of an input power source to the bus, and the rear module is configured to provide a supply voltage for a load according to a voltage on the bus, the method includes:
judging whether the output current of the preceding stage module is smaller than a preset current threshold value or not;
if so, keeping the output voltage of the preceding stage module as a preset voltage;
if not, limiting the current output current of the preceding stage module to be less than or equal to a preset current threshold;
detecting a voltage on the bus;
and adjusting the output power of the rear-stage module according to the voltage on the bus.
In an alternative mode, the adjusting the output power of the rear-stage module according to the voltage on the bus includes:
and when the voltage on the bus is reduced to a preset voltage threshold value, reducing the output power of the rear-stage module.
In an optional manner, the adjusting the output power of the rear-stage module according to the voltage on the bus further includes:
and when the voltage on the bus is increased to a preset voltage threshold value, increasing the output power of the rear-stage module.
In an optional manner, after increasing the output power of the subsequent module, the method further comprises:
and if the voltage on the bus is in a descending trend, reducing the output power of the rear-stage module.
In a second aspect, an embodiment of the present application provides a power control apparatus,
be applied to multichannel control system, wherein, multichannel control system includes preceding stage module and back stage module, preceding stage module with back stage module passes through the busbar connection, preceding stage module is used for with the energy transmission of input power to on the busbar, back stage module is used for according to voltage on the busbar provides supply voltage for the load, the device includes:
the first judging unit is configured on the preceding stage module and used for judging whether the output current of the preceding stage module is smaller than a preset current threshold value or not;
the voltage output unit is configured on the preceding module and used for keeping the output voltage of the preceding module as a preset voltage if the output current of the preceding module is smaller than a preset current threshold;
the current limiting unit is configured in the preceding stage module and used for limiting the current output current of the preceding stage module to be smaller than or equal to a preset current threshold value if the output current of the preceding stage module is larger than or equal to the preset current threshold value;
the detection unit is configured on the rear-stage module and used for detecting the voltage on the bus;
and the adjusting unit is configured on the rear-stage module and used for adjusting the output power of the rear-stage module according to the voltage on the bus. In a third aspect, an embodiment of the present application further provides a multipath control system, including:
the front-stage module and the rear-stage module are connected through a bus;
the backing module is configured to:
judging whether the output current of the preceding stage module is smaller than a preset current threshold value or not;
if so, keeping the output voltage of the preceding stage module as a preset voltage;
if not, limiting the current output current of the preceding stage module to be less than or equal to a preset current threshold;
the back-stage module is configured to:
if the output current is larger than or equal to a preset current threshold value, detecting the voltage on the bus;
and adjusting the output power of the rear-stage module according to the voltage on the bus.
In an alternative mode, the adjusting the output power of the rear-stage module according to the voltage on the bus includes:
and when the voltage on the bus is reduced to a preset voltage threshold value, reducing the output power of the rear-stage module.
In an optional manner, the adjusting the output power of the rear-stage module according to the voltage on the bus further includes:
and when the voltage on the bus is increased to a preset voltage threshold value, increasing the output power of the rear-stage module.
In an alternative, the front module comprises at least one of a rectifier module or a voltage converter module, wherein the rectifier module is used for converting the grid voltage to the bus, and the voltage converter module is used for converting the energy provided by wind energy, solar energy or geothermal energy to the bus;
the rear-stage module comprises a charging module, and the charging module is used for converting the voltage on the bus into the charging voltage of the energy storage unit.
In a third aspect, an embodiment of the present application further provides a non-transitory computer-readable storage medium, where the computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are executed by a multi-channel control system, the multi-channel control system is configured to execute the method described above.
The beneficial effects of the embodiment of the application are that: the power control method provided by the application is applied to a multi-path control system, wherein the multi-path control system comprises a front-stage module and a rear-stage module, the front-stage module and the rear-stage module are connected through a bus, the power control method comprises the steps of judging whether the output current of the front-stage module is smaller than a preset current threshold value, if so, keeping the output voltage of the front-stage module at the preset voltage, if not, limiting the current output current of the front-stage module to be smaller than or equal to the preset current threshold value, detecting the voltage on the bus, and adjusting the output power of the rear-stage module according to the voltage on the bus, so that on one hand, when the output current of the front-stage module is larger than the preset current threshold value, the output current of the front-stage module is limited through the front-stage module, the output power of the front-stage module can not exceed the maximum output power of the front-stage module, and the current output can be kept, so as to ensure that the system can work stably, on the other hand, the rear module can automatically adjust the output power of the rear module according to the detected voltage on the bus to realize that the output power of the rear module is less than or equal to the output power of the front module, so that the front module does not need to be set to have a certain output power margin, the cost of the system is reduced, and even if the input of the front module is the hybrid energy source, the rear module can automatically adjust the output power according to the power change of the hybrid energy source, namely the stability of the system is ensured.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.
Fig. 1 is a flowchart of a power control method according to an embodiment of the present disclosure;
fig. 2 is a schematic diagram of a curve of an output current and an output voltage of a pre-stage module according to an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of a graph of voltage on a bus and output power of a rear module according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a power control apparatus according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of a multi-channel control system according to an embodiment of the present disclosure;
fig. 6 is a schematic structural diagram of a multi-channel control system according to another embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, 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 some 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.
Referring to fig. 1, fig. 1 is a schematic diagram of a power control method according to an embodiment of the present disclosure. The control method is applied to a multi-path control system, wherein the multi-path control system comprises a front-stage module and a rear-stage module, the front-stage module is connected with the rear-stage module through a bus, the front-stage module is used for transmitting energy of an input power supply to the bus, and the rear-stage module is used for providing power supply voltage for a load according to voltage on the bus. As shown in fig. 1, the method includes:
101: and judging whether the output current of the preceding-stage module is smaller than a preset current threshold value.
102: if so, keeping the output voltage of the preceding stage module as a preset voltage.
The front-stage module can transmit the energy of an input power supply to the bus so as to enable the bus to generate voltage, and therefore the rear-stage module can provide power supply voltage for the load according to the voltage on the bus. When the current required by the load is small, that is, the power consumed by the load is small, the power output by the front module can meet the power required by the load, that is, the power output by the front module is greater than the power required by the load, that is, greater than the power required by the rear module. Therefore, at this time, the output current of the preceding stage module is smaller than the preset current threshold, and the voltage can be set to be the preset voltage.
Here, the load refers to a device that consumes electric energy, such as a battery in charge.
For example, in one embodiment, a plot of output current versus output voltage of a previous stage module is shown in FIG. 2, where the abscissa of FIG. 2 represents the output current I of the previous stage module and the ordinate represents the output voltage U of the previous stage module. At this time, the output voltage of the preceding module can be kept at the rated voltage Umax, and as the power consumption required by the load increases, the output current of the preceding module also increases gradually until the output current of the preceding module is greater than or equal to the preset current threshold value Imax.
The preset current threshold Imax may be a maximum current corresponding to the rated voltage Umax, or may be a maximum current smaller than the rated voltage Umax, which is not limited herein.
In practical applications, a voltage variation curve on the bus and a variation curve of the output power of the subsequent module shown in fig. 3 are taken as examples for explanation. Wherein U1 on the vertical axis represents the voltage on the bus, W on the vertical axis represents the output power of the rear module, T on the horizontal axis represents time, and curve LU1Representing the voltage variation on the busCurve LWShowing the variation curve of the output power of the rear-stage module.
During the period of (0, t1), since the power required by the load is still small, the curve LU1It can be seen that the voltage on the bus remains constant at the nominal output voltage Umax, instead of the curve LWIt can be known that the output power of the rear module is in an increasing trend, that is, the output power of the rear module is increasing, which indicates that the load connected to the rear module is increasing, that is, the power consumption required by the load is increasing. Of course, in other embodiments, the output power of the rear module may also be maintained in a substantially constant state during the period of time (0, t1), and the output current of the front module may also be gradually increased from 0 to gradually increase the output power after the output voltage of the front module is set to Umax.
103: and if not, limiting the current output current of the preceding stage module to be less than or equal to a preset current threshold value.
Furthermore, when the output current of the front-stage module is greater than or equal to the preset current threshold, current limiting is started at this time, and the current output current of the front-stage module is limited to be less than or equal to the preset current threshold, that is, when the output voltage of the front-stage module is the rated voltage Umax, the maximum output current of the front-stage module is limited to Imax. On one hand, when the output current of the preceding module is greater than or equal to the preset current threshold, the output current of the preceding module is limited, so that the preceding module can be prevented from entering a shutdown protection state due to overload, namely the preceding module stops working due to the fact that the output power of the preceding module exceeds the rated power of the preceding module. On the other hand, the output current of the preceding module is limited, but the output current of the preceding module is not directly reduced to 0, so that the preceding module can be always in an operating state, and the electric energy input can be always provided for the subsequent module, so that the subsequent module can be always in an operating state.
Meanwhile, in the application of the multi-path control system, a storage capacitor is usually arranged at the rear end of a front-stage module, the output pair of the front-stage module can charge the front-stage module, the output load of a rear-stage module can discharge the rear-stage module, at the moment, the discharging speed is higher than the charging speed due to the fact that the current of the output current of the front-stage module is limited, and then the output voltage of the front-stage module is reduced along with the increase of the power required by the load after the current of the output current of the front-stage module is limited. And, as the output voltage of the front module decreases, the output current of the front module may also decrease or remain unchanged (or may increase) accordingly.
It should be noted that, for different output voltages of the previous module, there are corresponding preset current thresholds, for example, assuming that the rated voltage is K volts, and the corresponding preset current threshold is K1 ampere times, then, assuming that the output voltage of the previous module is reduced to L volts, there is a corresponding preset current threshold L1 ampere times. Therefore, the output power of the preceding module can not exceed the maximum output power of the preceding module, and the purpose that the preceding module does not stop can be achieved, namely the preceding module can always provide certain output current.
Meanwhile, after the output current of the front-stage module is greater than or equal to the preset current threshold, the variable quantity of the current and the voltage can be set as a current-limiting curve. In one embodiment, the current limit curve may be the curve I1 shown in fig. 2, in which case the output current may be kept constant. In another embodiment, the current limit curve may also be a curve I2 as shown in fig. 2, in which the output voltage of the previous stage module decreases as the output voltage of the previous stage module decreases. Of course, in other embodiments, the current-limiting curve may be another curve, which only needs to satisfy that the output power of the front module does not exceed the maximum output power thereof, and the front module can always provide a certain output current, for example, as shown in a curve I3 in fig. 2, where the output voltage of the front module increases correspondingly as the output voltage of the front module increases.
Similarly, the voltage variation curve on the bus and the output power variation curve of the subsequent module shown in fig. 3 will be described as an example. At this time, time t1 corresponds to a time when the output current of the front stage module is greater than or equal to the preset current threshold. At time t1, the output current of the front module reaches the current limit point, i.e., the output current of the front module is equal to the pre-currentSetting a current threshold value, starting to limit the current output current of the preceding-stage module to be less than or equal to the preset current threshold value, and then, obtaining a curve LU1It is known that the output voltage of the preceding module starts to decrease, i.e., the voltage on the bus starts to decrease. Meanwhile, it can be understood that if the output current of the front module is still smaller than the preset current threshold at time t1, then it may be caused by the failure of the front module, for example, if the input power is supplied by two front modules under normal conditions, when one of the front modules fails, the total output power of the front module is insufficient, and the output voltage of the front module is reduced at time t 1.
104: the voltage on the bus is detected.
105: and adjusting the output power of the rear-stage module according to the voltage on the bus.
The rear module is connected with the bus, so that the rear module can also detect the voltage on the bus, and then the rear module can adjust the output power of the rear module according to the voltage on the bus, and finally the output power of the rear module is smaller than or equal to the output power of the front module.
Specifically, in one embodiment, when the voltage on the bus decreases to a preset voltage threshold, the output power of the rear module is decreased.
In another embodiment, when the bus voltage increases to a preset voltage threshold, the output power of the rear module is increased.
In practical applications, the voltage variation curve on the bus shown in fig. 3 and the output power variation curve of the subsequent module are still used as examples for explanation.
Assuming that the multi-path control system is always in a normal operating state, at time t1, the output current of the front module reaches the current limiting point, that is, the output current of the front module is equal to the preset current threshold, and the current output current of the front module starts to be limited to be less than or equal to the preset current threshold. Then, from the curve LU1It can be seen that the output voltage of the preceding module starts to decrease, i.e. the voltage on the bus starts to decrease, as indicated by curve LWKnowing the output power of the rear moduleThe rising trend is maintained (i.e., no adjustment is made by the back-stage module) until the voltage on the bus decreases to be equal to the predetermined voltage threshold. The preset voltage threshold is a threshold for the post-stage module to start adjusting the output power of the post-stage module, in other words, when the post-stage module detects that the voltage on the bus reaches the preset voltage threshold, the output power of the post-stage module can be correspondingly adjusted, wherein the preset voltage threshold can be set according to the practical application condition, and no limitation is made here, only the voltage on the bus needs to be ensured to still enable the multi-path control system to stably operate in the reduction process, namely, the multi-path control system cannot stop working due to the fact that the voltage on the bus is too small. Therefore, in the interval (t1, t2), the voltage on the bus bar is decreasing, and the output power of the rear-stage module is still increasing.
At time t2, represented by curve LU1The voltage on the Anemarrhena line is decreased to the predetermined voltage threshold U10 from the curve LWIt is known that the subsequent module starts to adjust the output power of the subsequent module. Since the voltage on the bus decreases to the preset voltage threshold U10 at time t2, the rear module controls the output power of the rear module to decrease from time t 2. Then, as the output power of the rear module is gradually decreased, when the output power of the rear module is smaller than the output power of the front module (i.e. the maximum output power of the front module), this means that the output power of the front module can already meet the requirement of the power required by the rear module, and the output power of the rear module is still decreasing, the output voltage of the front module will start to increase again. That is, when the output power of the rear module is equal to the output power of the front module, the output voltage of the front module reaches the lowest point, and then the output voltage of the front module rises, the voltage on the bus also rises until the voltage on the bus reaches the preset voltage threshold U10 again. Therefore, during the time period (t2, t3), the voltage on the bus reaches the lowest point of the voltage and turns from a downward trend to an upward trend, and the output power of the rear-stage module is always in a downward trend, i.e., the rear-stage module is always gradually reduced.
At time t3, represented by curve LU1Electricity on common anemarrhenaThe voltage increases to a predetermined voltage threshold U10 represented by curve LWIt is known that the subsequent module starts again to adjust the output power of the subsequent module. Since the voltage on the bus increases to the preset voltage threshold U10 at time t2, the rear module controls the output power of the rear module to increase from time t 3. At this time, the output power of the rear module is still smaller than the output power of the front module, and then the voltage on the bus is in a rising trend all the time, that is, the voltage on the bus gradually increases until the rated voltage Umax of the front module is reached. Then, the preceding stage module keeps the output voltage of the preceding stage module at the rated voltage Umax. Therefore, in the interval (t3, t4), the voltage on the bus bar is gradually increased to the rated voltage Umax and is kept at the rated voltage Umax until the current limiting point of the output current is reached again, and the output power of the rear-stage module is gradually increased.
Further, at time t4, represented by curve LU1It can be known that the output current of the front module reaches the current limiting point, and the output current of the front module is limited by the front module to be less than or equal to the preset current threshold, and then the output voltage of the front module starts to decrease again, that is, the voltage on the bus becomes a downward trend again, which indicates that the output power of the rear module has reached a maximum value. In order to satisfy the requirement of the output power of the front module, i.e. the output power of the rear module should be less than or equal to the maximum output power of the front module, the curve L representsWIt is known that the output power of the subsequent module starts to be reduced at this time. When the output power of the front-stage module is equal to that of the rear-stage module, the multi-path control system enters a stable state, the output voltage of the front-stage module is kept unchanged, namely the voltage on the bus is kept unchanged, and meanwhile, the output power of the rear-stage module is also kept unchanged. Therefore, in the section (t4, t5), the voltage on the bus and the output power of the rear module are both in a downward trend, and after the time t5, the output power of the front module is equal to the output power of the rear module, and the voltage on the bus and the output power of the rear module are both kept unchanged.
It should be noted that, in the above embodiment, when the voltage on the bus decreases to the preset voltage threshold U10 or increases to the preset voltage threshold U10, the output power of the rear module is adjusted. In other embodiments, the output power of the rear module may be adjusted when the voltage on the bus decreases to the preset first voltage threshold or increases to the second preset voltage threshold, that is, two different voltage thresholds may be set, for example, the first preset voltage threshold is also set to the preset voltage threshold U10, and the second preset voltage threshold is set to a value greater than the preset voltage threshold U10.
In summary, in the present application, the front module has a function of limiting the output current, and the rear module adjusts the output power of the rear module according to the voltage on the detection bus. On the one hand, the output power of the rear-stage module can automatically track the maximum output power of the front-stage module, so that the situation that the system cannot stably output due to over-power protection (namely, the front-stage module enters a shutdown protection state due to overload) can be avoided, and the stable operation of the system is ensured. On the other hand, the output power of the rear-stage module can be finally equal to or nearly equal to the maximum output power of the front-stage module, so that the output capacity of the system can be maximized, a certain margin of the output power does not need to be set in the front-stage module as in the prior art, and the cost of the system is reduced.
Meanwhile, the method provided by the application is not only suitable for the condition that the output power of the rear-stage module changes violently and exceeds the maximum power of the front-stage module. The multi-path control system is also suitable for the situation that the output power of the front-stage module is constantly and violently changed, for example, when the voltage source of the front-stage module is unstable new energy such as wind energy and light energy, the maximum output power of the front-stage module is constantly changed, and the multi-path control system can constantly adjust the output power of the rear-stage module according to the change, so that the change is well adapted, and therefore, the output capacity of the hybrid energy input system can be maximally exerted while the stability of the multi-path control system is ensured.
It should be noted that, in the above embodiment, the steps 101, 102 and 103 of the power control method are implemented by a front module, and the steps 104 and 105 are implemented by a rear module, because the front module only achieves the purpose of controlling the voltage on the bus by changing its output voltage, and the rear module only adjusts its power by detecting the voltage on the bus, then no communication is needed between the front module and the rear module. Not only can save the cost increased by realizing communication, but also can be convenient to replace (i.e. increase or reduce) the front-stage module or the rear-stage module. In other embodiments, a control unit may be added, and the power control method is set in the control unit, so as to control the front module and the rear module through the control unit.
Fig. 4 is a schematic structural diagram of a power control apparatus according to an embodiment of the present invention, where the power control apparatus is applied to a multi-channel control system, where the multi-channel control system includes a front-stage module and a rear-stage module, the front-stage module is connected to the rear-stage module through a bus, the front-stage module is configured to transmit energy of an input power source to the bus, and the rear-stage module is configured to provide a supply voltage for a load according to a voltage on the bus. As shown in fig. 4, the power control apparatus 400 includes a first determining unit 401, a voltage outputting unit 402, a current limiting unit 403, a detecting unit 404, and an adjusting unit 405. The first determining unit 401 is configured in the front module, and the first determining unit 401 is configured to determine whether an output current of the front module is smaller than a preset current threshold; the voltage output unit 402 is disposed in the front module, and the voltage output unit 402 is configured to keep the output voltage of the front module as a preset voltage if the output current of the front module is smaller than a preset current threshold; the current limiting unit 403 is configured in the pre-stage module, and the current limiting unit 403 is configured to limit the current output current of the pre-stage module to be less than or equal to the preset current threshold if the output current of the pre-stage module is greater than or equal to the preset current threshold; the detection unit 404 is configured in the rear module, and the detection unit 404 is configured to detect a voltage on the bus; the adjusting unit 405 is configured to the rear module, and the adjusting unit 405 is configured to adjust the output power of the rear module according to the voltage on the bus.
Since the apparatus embodiment and the method embodiment are based on the same concept, the contents of the apparatus embodiment may refer to the method embodiment on the premise that the contents do not conflict with each other, and are not described herein again.
Fig. 5 is a schematic structural diagram of a multiplexing control system 50 according to an embodiment of the present invention. As shown in fig. 5, the multiplex control system 50 includes a front module 51 and a rear module 52, and the front module 51 and the rear module 52 are connected by a bus L.
Among other things, the front-level module 51 includes one or more processors 511 and a memory 512. In fig. 5, one processor 511 is taken as an example.
The processor 511 and the memory 512 may be connected by a bus or other means, such as the bus connection shown in fig. 5.
The memory 512, which is a non-volatile computer-readable storage medium, may be used to store non-volatile software programs, non-volatile computer-executable programs, and modules, such as program instructions/modules corresponding to the power control method in the embodiment of the present invention (for example, the first determining unit 401, the voltage output unit 402, and the current limiting unit 403 shown in fig. 4). The processor 511 executes various functional applications and data processing of the terminal interaction device by running the nonvolatile software programs, instructions and modules stored in the memory 512, that is, implements the functions of the corresponding steps (e.g., step 101, step 102 and step 103 in fig. 1) in the power control method in the above-described method embodiment and the corresponding respective modules and units in the above-described device embodiment.
The memory 512 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 non-volatile solid state storage device. In some embodiments, the memory 512 may optionally include memory located remotely from the processor 511, which may be connected to the processor 511 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The program instructions/modules are stored in the memory 512 and, when executed by the one or more processors 511, perform corresponding steps in the power control method in any of the above-described method embodiments, e.g., performing steps 101, 102 and 103 in fig. 1 described above; the first determination unit 401, the voltage output unit 402, and the current limiting unit 403 in fig. 4 may also be implemented.
The back-stage module 52 includes one or more processors 521 and a memory 522. In fig. 5, one processor 521 is taken as an example.
The processor 521 and the memory 522 may be connected by a bus or other means, such as the bus connection shown in fig. 5.
The memory 522 is a non-volatile computer-readable storage medium and can be used for storing non-volatile software programs, non-volatile computer-executable programs, and modules, such as program instructions/modules (e.g., the detecting unit 404 and the adjusting unit 405 shown in fig. 4) corresponding to the power control method in the embodiment of the present invention. The processor 521 executes various functional applications and data processing of the terminal interaction device by executing the nonvolatile software programs, instructions and modules stored in the memory 522, that is, implements the functions of the corresponding steps (e.g., steps 104 and 105 in fig. 1) in the power control method in the above-described method embodiment and the corresponding respective modules and units in the above-described device embodiment.
The memory 522 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 non-volatile solid state storage device. In some embodiments, the memory 522 may optionally include memory located remotely from the processor 521, which may be connected to the processor 521 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The program instructions/modules stored in the memory 522, when executed by the one or more processors 521, perform corresponding steps in the power control method in any of the above-described method embodiments, e.g., performing steps 104 and 105 of fig. 1 described above; the detection unit 404 and the adjustment unit 405 in fig. 4 may also be implemented.
In one embodiment, as shown in fig. 6, the front module comprises a rectifier module a1 and a voltage converter module a2, i.e. both the rectifier module a1 and the voltage converter module a2 can implement the method steps implemented by the front module in the above embodiments, wherein the rectifier module a1 is used for converting the grid voltage to the bus, and the voltage converter module a2 is used for converting the wind energy, solar energy or geothermal voltage to the bus. The subsequent modules include a charging module B1, a charging module B2, and a charging module B3 … …, each of which is capable of implementing the method steps implemented by the subsequent modules in the above embodiments, wherein each of the charging modules is configured to convert the voltage on the bus into the charging voltage of each corresponding energy storage unit, for example, the charging module B1 is configured to convert the voltage on the bus into the charging voltage of the energy storage unit C1. The energy storage unit C1, the energy storage unit C2, and the energy storage unit C3 … … correspond to the loads in the above embodiments, and each energy storage unit is a battery or a capacitor.
It should be noted that the hardware configuration of the multiplex control system 50 as shown in fig. 6 is merely an example, and that the multiplex control system 50 may have more or less components than those shown in the figure, may combine two or more components, or may have a different configuration of components, and that the various components shown in the figure may be implemented in hardware, software, or a combination of hardware and software including one or more signal processing and/or application specific integrated circuits. For example, the front stage module may include only rectifier module A1. For another example, the front module may further include a dc conversion module, and the dc conversion module may be configured to convert the voltage of the high-voltage battery to the bus.
Embodiments of the present invention also provide a non-transitory computer-readable storage medium, which stores computer-executable instructions, and when the computer-executable instructions are executed by a multi-channel control system, the multi-channel control system executes the method in any of the above embodiments.
Embodiments of the present invention also provide a computer program product comprising a computer program stored on a computer-readable storage medium, the computer program comprising program instructions which, when executed by a computer, cause the computer to perform the method of any of the above embodiments.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; within the context of the present application, where technical features in the above embodiments or in different embodiments can also be combined, the steps can be implemented in any order and there are many other variations of the different aspects of the present application as described above, which are not provided in detail for the sake of brevity; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. A power control method applied to a multi-channel control system, wherein the multi-channel control system includes a front module and a rear module, the front module and the rear module are connected through a bus, the front module is configured to transmit energy of an input power source to the bus, and the rear module is configured to provide a supply voltage for a load according to a voltage on the bus, the method comprising:
judging whether the output current of the preceding stage module is smaller than a preset current threshold value or not;
if so, keeping the output voltage of the preceding stage module as a preset voltage;
if not, limiting the current output current of the preceding stage module to be less than or equal to a preset current threshold;
detecting a voltage on the bus;
and adjusting the output power of the rear-stage module according to the voltage on the bus.
2. The method of claim 1, wherein said adjusting the output power of the rear module based on the voltage on the bus comprises:
and when the voltage on the bus is reduced to a preset voltage threshold value, reducing the output power of the rear-stage module.
3. The method of claim 2, wherein said adjusting the output power of said rear module based on the voltage on said bus further comprises:
and when the voltage on the bus is increased to a preset voltage threshold value, increasing the output power of the rear-stage module.
4. The method of claim 3, wherein after increasing the output power of the subsequent module, the method further comprises:
and if the voltage on the bus is in a descending trend, reducing the output power of the rear-stage module.
5. A power control apparatus, applied to a multi-channel control system, wherein the multi-channel control system includes a front module and a rear module, the front module and the rear module are connected through a bus, the front module is configured to transmit energy of an input power source to the bus, and the rear module is configured to provide a supply voltage for a load according to a voltage on the bus, the apparatus comprising:
the first judging unit is configured on the preceding stage module and used for judging whether the output current of the preceding stage module is smaller than a preset current threshold value or not;
the voltage output unit is configured on the preceding module and used for keeping the output voltage of the preceding module as a preset voltage if the output current of the preceding module is smaller than a preset current threshold;
the current limiting unit is configured in the preceding stage module and used for limiting the current output current of the preceding stage module to be smaller than or equal to a preset current threshold value if the output current of the preceding stage module is larger than or equal to the preset current threshold value;
the detection unit is configured on the rear-stage module and used for detecting the voltage on the bus;
and the adjusting unit is configured on the rear-stage module and used for adjusting the output power of the rear-stage module according to the voltage on the bus.
6. A multiplexed control system, comprising:
the front-stage module and the rear-stage module are connected through a bus;
the backing module is configured to:
judging whether the output current of the preceding stage module is smaller than a preset current threshold value or not;
if so, keeping the output voltage of the preceding stage module as a preset voltage;
if not, limiting the current output current of the preceding stage module to be less than or equal to a preset current threshold;
the back-stage module is configured to:
detecting a voltage on the bus;
and adjusting the output power of the rear-stage module according to the voltage on the bus.
7. The multiplexed control system of claim 6, wherein the adjusting the output power of the back-stage module according to the voltage on the bus comprises:
and when the voltage on the bus is reduced to a preset voltage threshold value, reducing the output power of the rear-stage module.
8. The multiplexed control system of claim 6, wherein the adjusting the output power of the back-stage module based on the voltage on the bus further comprises:
and when the voltage on the bus is increased to a preset voltage threshold value, increasing the output power of the rear-stage module.
9. Multi-way control system according to claim 7 or 8,
the front-stage module comprises at least one of a rectifying module or a voltage conversion module, wherein the rectifying module is used for converting the voltage of a power grid to the bus, and the voltage conversion module is used for converting energy provided by wind energy, solar energy or geothermal energy to the bus;
the rear-stage module comprises a charging module, and the charging module is used for converting the voltage on the bus into the charging voltage of the energy storage unit.
10. A non-transitory computer-readable storage medium having stored thereon computer-executable instructions that, when executed by a multiplex control system, cause the multiplex control system to perform the method of any of claims 1-5.
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| CN114461003A (en) * | 2022-02-09 | 2022-05-10 | 深圳市建筑科学研究院股份有限公司 | Output power adjusting method, device and socket |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114461003A (en) * | 2022-02-09 | 2022-05-10 | 深圳市建筑科学研究院股份有限公司 | Output power adjusting method, device and socket |
| CN114461003B (en) * | 2022-02-09 | 2024-04-02 | 深圳市建筑科学研究院股份有限公司 | Output power adjusting method, device and socket |
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