CN106972480B - Control method, device and system of direct current electrical system - Google Patents

Control method, device and system of direct current electrical system Download PDF

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Publication number
CN106972480B
CN106972480B CN201710278499.6A CN201710278499A CN106972480B CN 106972480 B CN106972480 B CN 106972480B CN 201710278499 A CN201710278499 A CN 201710278499A CN 106972480 B CN106972480 B CN 106972480B
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power
load
module
rectifying
total
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CN106972480A (en
Inventor
邝振威
赖元华
明开云
李国耀
樊钊
黄雯慧
韩志勇
王承刚
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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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
    • H02J1/00—Circuit arrangements for dc mains or dc distribution networks
    • H02J1/10—Parallel operation of dc sources
    • H02J1/102—Parallel operation of dc sources being switching converters

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Direct Current Feeding And Distribution (AREA)

Abstract

The invention discloses a control method, a control device and a control system of a direct current electrical system. Wherein the method comprises the following steps: acquiring the total load power of a current load, wherein the total load power is the sum of the power of one or more loads currently in a working state; determining at least one rectifying module for supplying power to the load according to the total power of the load; at least one rectifier module is controlled to supply power to one or more loads. The invention solves the technical problem of low energy utilization caused by the fact that information exchange cannot be carried out among all rectification modes in the existing direct current electrical system.

Description

Control method, device and system of direct current electrical system
Technical Field
The invention relates to the field of electricity, in particular to a control method, a control device and a control system of a direct current electric system.
Background
At present, a direct current system is becoming more and more popular due to high safety, for example, a direct current system used by an electric cabinet in an air conditioning system. In the direct current system, when the load power increases, the number of required rectifying modules (AC/DC power supply modules) increases, and thus, the related art configures enough rectifying modules according to the power of all loads. However, in practical applications, not all loads are in operation at the same time. Because no information interaction is realized among all the rectification modules in the existing direct current system, energy cannot be effectively utilized.
Aiming at the problem that the energy utilization is not high due to the fact that information exchange cannot be carried out among all rectification modes in the existing direct current electrical system, no effective solution is proposed at present.
Disclosure of Invention
The embodiment of the invention provides a control method, a control device and a control system of a direct current electrical system, which at least solve the technical problem that energy utilization is not high due to the fact that information exchange cannot be carried out among all rectification modes in the existing direct current electrical system.
According to an aspect of an embodiment of the present invention, there is provided a control method of a direct current electrical system, including: acquiring the total load power of a current load, wherein the total load power is the sum of the power of one or more loads currently in a working state; determining at least one rectifying module for supplying power to the load according to the total power of the load; at least one rectifier module is controlled to supply power to one or more loads.
According to an aspect of an embodiment of the present invention, there is provided a control system of a direct current electrical system, including: the device comprises at least one rectifying module, a power supply module and a control module, wherein the at least one rectifying module is used for supplying power to a load, the at least one rectifying module forms a single-end input and multi-end output connecting structure, a single input end of the connecting structure is connected with an external alternating current power supply, and a plurality of output ends of the connecting structure are connected with the load; the control main board is connected with the at least one rectifying module and used for acquiring the total load power of the current load and determining the at least one rectifying module for supplying power to the load according to the total load power, wherein the total load power is the sum of the power of one or more loads currently in a working state.
According to another aspect of the embodiments of the present invention, there is also provided an electrical system including a control system of any one of the dc electrical systems described above.
According to another aspect of the embodiment of the present invention, there is also provided a control device for a dc electrical system, including: the first acquisition module is used for acquiring the total load power of the current load, wherein the total load power is the sum of the power of one or more loads currently in a working state; the first determining module is used for determining at least one rectifying module for supplying power to the load according to the total power of the load; the control module is used for controlling the at least one rectifying module to supply power for one or more loads.
According to another aspect of the embodiments of the present invention, there is also provided a storage medium including a stored program, wherein the program executes the control method of the dc electrical system of any one of the above.
According to another aspect of the embodiment of the present invention, there is also provided a processor, configured to execute a program, where the program executes the control method of the dc electrical system of any one of the above-mentioned embodiments.
In the embodiment of the invention, the total load power of the current load is obtained, wherein the total load power is the sum of the powers of one or more loads in a current working state; determining at least one rectifying module for supplying power to the load according to the total power of the load; the at least one rectifying module is controlled to supply power to one or more loads, the purpose of selecting the quantity of the rectifying modules to supply power to the loads according to the load condition is achieved, the technical effect of improving the energy utilization rate of the direct current system is achieved, and the technical problem that the energy utilization rate is low due to the fact that information exchange cannot be carried out among all rectifying modes in the existing direct current electrical system is solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:
FIG. 1 is a flow chart of a control method of a DC electrical system according to an embodiment of the application;
FIG. 2 is a flow chart of an alternative control method of a DC electrical system according to an embodiment of the application;
FIG. 3 is a flow chart of an alternative control method of a DC electrical system according to an embodiment of the application;
FIG. 4 is a schematic diagram of a tree topology of an alternative rectifier module according to an embodiment of the application;
FIG. 5 is a flow chart of an alternative control method of a DC electrical system according to an embodiment of the application;
FIG. 6 is a flow chart of an alternative control method of a DC electrical system according to an embodiment of the application;
FIG. 7 is a schematic diagram of a control system of a preferred DC electrical system according to an embodiment of the application;
FIG. 8 is a schematic diagram of a control system for a DC electrical system according to an embodiment of the application;
FIG. 9 is a schematic diagram of a control system of an alternative DC electrical system according to an embodiment of the application; and
Fig. 10 is a schematic diagram of a control device of a dc electrical system according to an embodiment of the present invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example 1
According to an embodiment of the present invention, there is provided a control method embodiment of a direct current electrical system, it being noted that the steps shown in the flowcharts of the drawings may be performed in a computer system such as a set of computer executable instructions, and that although a logical order is shown in the flowcharts, in some cases the steps shown or described may be performed in an order different from that herein.
Fig. 1 is a flowchart of a control method of a dc electrical system according to an embodiment of the present invention, as shown in fig. 1, the method includes the following steps:
step S102, obtaining the total load power of the current load, wherein the total load power is the sum of the powers of one or more loads currently in a working state.
Specifically, in the above steps, the load refers to a device or element that converts electric energy into other forms of energy, and may be household appliances such as various air conditioners, washing machines, refrigerators, televisions, terminal devices such as computers, notebook computers, mobile phones, and electronic components capable of consuming power such as resistors, engines, and bulbs; the total load power refers to the sum of power consumed by all loads currently connected to the circuit.
As an alternative embodiment, the total load power may be calculated by a load voltage and a current, wherein the load voltage may be detected by a voltage detection means and the load current may be detected by a current detection means (e.g. a current sensor).
As another alternative embodiment, the power of each load may be directly obtained by a power detection device (e.g., a power detector, etc.), and the total power of the loads may be obtained by adding the powers of each load.
Step S104, determining at least one rectifying module for supplying power to the load according to the total power of the load.
Specifically, in the step, the total power of the load is the sum of the powers of at least one load currently connected to the circuit, the rectification module is an AC/DC module for converting alternating current into direct current available to the load, the at least one rectification module forms a connection structure with single-ended input and multi-ended output, a single input end of the connection structure is connected with an external alternating current power supply, and a plurality of output ends of the connection structure are connected with the load; after the total power of the load of the at least one currently accessed load is obtained, the number of rectifying modules (AC/DC modules) needed to supply power to the current load can be calculated, and optionally, the power supply power provided by each AC/DC module is the same.
As an alternative embodiment, the losses of the circuit itself due to heating of the wires etc. are taken into account when calculating the number of rectifying modules for powering the load from the total power of the load.
Step S106, controlling at least one rectifying module to supply power to one or more loads.
Specifically, in the above steps, after determining the number of rectifying modules for supplying power to the load according to the total load power of at least one load currently connected to the circuit, if the power of the load increases, the number of connected rectifying modules is increased, the rectifying modules not connected to the circuit can be controlled to be turned on, and the specific number of turned on can be calculated according to the total load power and the line loss; if the power of the load is reduced, the number of connected rectifying modules is reduced, so that the rectifying modules of some connected circuits can be controlled to be closed, and the specific closing number can be calculated according to the total power of the load and the line loss.
It should be noted that, the connection structure of single-ended input and multi-ended output refers to that the connection structure is connected with an external ac power supply through one rectifying module, and the connection of other rectifying modules is dependent on whether the connection between the other rectifying modules and the rectifying module is on or not.
As can be seen from the above, in the above embodiment of the present application, the total load power of the current access load is obtained by establishing communication with the load and each rectifying module, the number of rectifying modules that need to supply power to the load is determined according to the total load power of the current access load, and after the number of rectifying modules that need to supply power to the load is determined, the corresponding number of rectifying modules in the control circuit supply power to the load. It is easy to note that if the power supply power of the rectifier module connected in the current circuit is smaller than the total power of the load, the rectifier module not connected in the current circuit is controlled to be started; if the power supply power of the rectification module which is connected in the current circuit is equal to the total power of the load, the rectification module which is connected in the current circuit is maintained to supply power for the load; if the power supply power of the rectifier modules connected to the current circuit is larger than the total load power, the rectifier modules connected to the current circuit are controlled to be closed, the number of the rectifier modules which are opened or closed is determined according to the load power, and after the rectifier modules are opened or closed, the number of the rectifier modules in the current circuit can meet the total load power of the current load.
According to the scheme disclosed by the embodiment of the application, the purpose of selecting the number of the rectifying modules as required to supply power to the load according to the load condition is achieved, so that the technical effect of improving the energy utilization rate of the direct current system is achieved, and the technical problem that the energy utilization rate is not high due to the fact that information exchange cannot be carried out among all rectifying modes in the existing direct current electrical system is solved.
In an alternative embodiment, as shown in fig. 2, step S104, determining at least one rectifying module for powering the load according to the total power of the load may include the steps of:
step S202, obtaining the total power of power supply of the current rectifying module, wherein the total power of power supply is the sum of the power supply power provided by one or more current rectifying modules;
step S204, judging whether the total power of the load is larger than the current total power of the power supply;
step S206, determining at least one rectifying module for supplying power to the load according to the judging result.
Specifically, in the step, the total power of the load is the sum of the powers of at least one load of the current access circuit, the total power of the power supplies is the sum of the powers supplied by the rectifying modules of the current access circuit, and since the power supply of each rectifying module is known, the total power of the power supplies supplied by the rectifying modules of the current access circuit can be obtained through calculation, the total power of the load of at least one load of the current access circuit is detected and obtained in real time, and the number of rectifying modules required to supply power to the current load is determined according to the relation between the total power of the load detected currently and the total power of the power supplies.
Based on the foregoing embodiment, in an alternative implementation, as shown in fig. 3, step S204, according to a determination result, determining at least one rectifying module for supplying power to a load may include the following steps:
step S302, if the total power of the load is larger than the current total power of the power supply, the number of rectifying modules for supplying power to the load is increased;
step S304, if the total power of the load is equal to the current total power of the power supply, the number of the rectifying modules for supplying power to the load is maintained unchanged;
in step S306, if the total power of the load is smaller than the total power of the current power supply, the number of rectifying modules supplying power to the load is reduced.
Alternatively, the execution order of the above steps S302, S304, and S306 may be interchanged.
Specifically, in the above steps, after the total power of power supplied by the rectification module of the current accessed circuit is calculated, if the total power of load of the current accessed load is detected to be greater than the power of power supplied by the rectification module accessed in the current circuit, the rectification module of the accessed circuit is controlled to be closed; the power supply power is equal to the power supply power of the rectification module which is connected in the current circuit, and the rectification module which is connected in the current circuit is maintained to supply power for the load; and if the total load power of the current accessed load is detected to be smaller than the power supply power of the accessed rectifying module in the current circuit, controlling the rectifying module which is not accessed into the circuit to be started.
It should be noted that the number of the rectifier modules that are turned on or off needs to be determined according to the load power, and after the rectifier modules are turned on or off, the number of the rectifier modules in the circuit can meet the total load power of the current load.
According to the scheme disclosed by the embodiment of the application, the purpose of recording the rectifier modules for supplying power to the load according to the load power as required is realized, and the problem of unnecessary energy loss caused by starting more rectifier modules under the condition of smaller load power is avoided.
In an alternative embodiment, the rectifying module includes: and the plurality of rectifying modules are connected according to a tree topology, wherein each rectifying module of the upper stage in the tree topology is connected with the plurality of rectifying modules of the lower stage.
Specifically, in the above steps, a plurality of rectifying modules may be connected according to a tree topology, each rectifying module may be connected to at least two rectifying modules of a next stage, optionally, fig. 4 shows a tree topology schematic diagram of an optional rectifying module according to an embodiment of the present application, as shown in fig. 4, where a rectifying module on a root node (1 st stage) in the tree topology is connected to 2 rectifying modules of the next stage (2 nd stage), and the two rectifying modules are respectively connected to 2 rectifying modules of the next stage (3 rd stage), that is, the number of 3 rd rectifying modules is 4, and sequentially connected to the next stage until the number of rectifying modules on the nth stage in the tree topology is a power of 2.
It should be noted that the above tree topology is only illustrative, and the tree topology can be expanded into other modes, so long as the purpose of loading the rectifying module according to the need can be achieved, the tree topology is within the scope of protection of the present application.
Based on the above embodiment, if the rectifying module is a plurality of rectifying modules connected according to a tree topology, in the circuit, the input end of the rectifying module located on the root node in the tree topology may be set to be connected with an external ac power supply, and the output end of the rectifying module located on each stage of node in the tree topology may be set to be connected with a load. As an alternative embodiment, as shown in fig. 5, according to the total power of the load, at least one rectifying module for supplying power to the load is determined, including:
step S502, obtaining the power supply of a first-stage rectifying module in a tree topology structure;
step S504, judging whether the total power of the load is larger than the power supply power of the first-stage rectifying module;
step S506, if the total power of the load is larger than the power supply power of the first-stage rectifying module, starting a second-stage rectifying module, wherein the second-stage rectifying module is one or more rectifying modules of the next stage of the first-stage rectifying module;
And step S508, if the total power of the load is smaller than or equal to the power supply power of the first-stage rectifying module, controlling the first-stage rectifying module to supply power to the load.
Specifically, in the above steps, under the default condition, the first stage rectifying module may be turned on first, that is, only the first stage rectifying module is connected to the circuit to supply power to the load, so as to obtain the power supply of the first stage rectifying module in the tree topology structure, detect the current load power in real time, determine whether the total power of the load is greater than the power supply that the first stage rectifying module can provide, if the total power of the load is greater than the power supply of the first stage rectifying module, turn on one or more rectifying modules of the next stage of the first stage rectifying module, and if the total power of the load is less than or equal to the power supply of the first stage rectifying module, control the first stage rectifying module to supply power to the load.
It should be noted that if the first stage rectifying module includes a plurality of rectifying modules (i.e., the first stage rectifying module is a rectifying module above the second stage in the tree topology), when the total power of the load is smaller than the power supply of the first stage rectifying module, a part of the rectifying modules on the same stage may be selectively turned off, so long as the number of rectifying modules in the circuit is ensured to satisfy the total power of the load of the current load.
In an alternative embodiment, as shown in fig. 6, after the second stage rectifying module is turned on if the total load power is greater than the power supplied by the first stage rectifying module, the method further includes the steps of:
step S602, detecting the total load power of the current load in real time;
in step S604, if the total load power of the current load is reduced and is less than or equal to the power supply power of the first stage rectifying module, the second stage rectifying module is turned off.
Specifically, in the above steps, during the process of supplying power to the load by using the rectifying module determined according to the total power of the load, the total power of the load of the current load is continuously detected in real time, and if the total power of the load of the current load is reduced (possibly, a user turns off part of the electric equipment) and is less than or equal to the power supply of the first-stage rectifying module, the second-stage rectifying module is turned off. Alternatively, if the total load power of the current load is reduced but still greater than the power supplied by the first stage rectifier module, it may be selected to turn off part of the rectifier modules in the first stage rectifier module, as long as it is ensured that the number of rectifier modules in the circuit can meet the total load power of the current load.
By the embodiment, the purpose of adjusting the number of the rectifying modules for supplying power to the load according to the load power detected in real time can be realized in the power supply process.
As a preferred implementation, fig. 7 shows a schematic diagram of a control system of a preferred dc electrical system according to an embodiment of the present invention, as shown in fig. 7, where the control system includes: the system comprises a control main board, at least one AC/DC module, a direct current load, a detection device and an upper display unit, wherein the control main board is used for monitoring and allocating the whole system, the AC/DC module is communicated with the AC/DC module, the AC/DC module is communicated with the control main board, and the load is communicated with the control main board through a power line carrier, so that relevant information is fed back in real time. When the direct current load works, the power supply of the AC/DC module (rectifying module) can be regulated according to the requirements of actual working conditions. The increase and the decrease of the load power are fed back to the control main board in real time, the control main board determines the number of the AC/DC modules to be accessed through calculation, configures the AC/DC modules, and starts the supplement of the lower modules if the load power is increased and the first-stage modules are not sufficiently supplied (the number of the lower modules which are started can be one or N, and N is determined according to the load condition); if the load power is reduced, the lower module is closed, so that energy loss is avoided. Meanwhile, detection devices are arranged among all stages of modules, so that the loss and various data (such as current, voltage, line temperature, harmonic wave and the like) of the system can be monitored and fed back to an upper control panel. In summary, the electrical system can implement intelligent diagnosis and intelligent management through effective communication and calculation.
It should be noted that the detection device is installed between each rectifying module and two next-stage modules directly connected with each rectifying module; the power of the rectifying module is the same, and in an alternative embodiment, the detecting device may be an integrated chip that integrates functions of monitoring current, voltage, power, temperature, etc., for example, devices integrated with current and voltage micro transformers, temperature sensors, power meters, etc.
According to the scheme disclosed by the embodiment of the application, a plurality of rectifying modules share bus input to form a single-input multi-output structure, so that the following technical effects can be achieved: (1) The information interaction is carried out among the modules, the effective energy distribution is carried out through the control main board, and the AC/DC module is put into the fixed point according to the use condition of the load, so that unnecessary energy consumption is reduced; (2) Through the detection device between the rectification modules, the loss on the circuit is monitored in real time, and the data such as real-time current, voltage, power, harmonic wave, copper bar or wire temperature among the detection modules are collected, so that the abnormality can be found in time and related information (such as abnormal state such as overhigh temperature or abnormal current of a certain rectification module) can be fed back, the running condition of the system can be intelligently diagnosed by the direct current system, and the energy closed-loop regulation is formed by carrying out omnibearing monitoring on the running of the system, so that the utilization rate of resources is improved.
Example 2
According to an embodiment of the present invention, there is provided a control system embodiment of a dc electrical system, and fig. 8 is a schematic diagram of a control system of a dc electrical system according to an embodiment of the present invention, as shown in fig. 8, the system includes: at least one rectifying module 1 and a control motherboard 2.
The device comprises at least one rectifying module 1, a load 3, a power supply module and a power supply module, wherein the at least one rectifying module is used for supplying power to the load 3, the at least one rectifying module forms a single-end input and multi-end output connecting structure, a single input end of the connecting structure is connected with an external alternating current power supply 4, and a plurality of output ends of the connecting structure are connected with the load;
the control main board 2 is connected with at least one rectifying module and is used for obtaining the total load power of the current load, and determining at least one rectifying module for supplying power to the load according to the total load power, wherein the total load power is the sum of the power of one or more loads currently in an operating state.
Specifically, the rectifying module 1 is an AC/DC module for converting AC power into DC power usable by a load, the at least one rectifying module forms a single-ended input and multi-ended output connection structure, a single input end of the connection structure is connected with an external AC power supply, and a plurality of output ends of the connection structure are connected with the load 3; after the total power of the load of the at least one currently accessed load is obtained, the number of rectifying modules (AC/DC modules) needed to supply power to the current load can be calculated, and optionally, the power supply power provided by each AC/DC module is the same. The control main board 2 may be a PCB board (e.g., a control chip) with processing and analyzing functions, and may be connected to each rectifying module separately or may be connected to a combination of a plurality of rectifying modules. The control main board 2 is also connected with a load, can be used for the total load power of at least one load, determines the number of rectifier modules for supplying power to the load according to the total load power, if the power of the load is increased, increases the number of the connected rectifier modules, can control the rectifier modules which are not connected into a circuit to be started, and the specific starting number can be calculated according to the total load power and line loss; if the power of the load is reduced, the number of connected rectifying modules is reduced, so that the rectifying modules of some connected circuits can be controlled to be closed, and the specific closing number can be calculated according to the total power of the load and the line loss.
Optionally, the control main board 2 further includes: and the calculation module is used for calculating the power supply power for supplying power to the load. The total power supplied is the sum of the power supplied by the rectifying modules of the current access circuit, and since the power supplied by each rectifying module is known, the total power supplied by the rectifying modules of the current access circuit can be obtained through calculation, the total power of the load of at least one load of the current access circuit is detected and obtained in real time, and the number of rectifying modules which need to supply power for the current load is determined according to the relation between the total power of the load detected currently and the total power of the power supplied. After the total power of the power supply of the rectification module of the current accessed circuit is calculated, if the total power of the load of the current accessed load is detected to be larger than the power of the power supply of the rectification module accessed in the current circuit, the rectification module of the accessed circuit is controlled to be closed; the power supply power is equal to the power supply power of the rectification module which is connected in the current circuit, and the rectification module which is connected in the current circuit is maintained to supply power for the load; and if the total load power of the current accessed load is detected to be smaller than the power supply power of the accessed rectifying module in the current circuit, controlling the rectifying module which is not accessed into the circuit to be started.
It should be noted that the number of the rectifier modules that are turned on or off needs to be determined according to the load power, and after the rectifier modules are turned on or off, the number of the rectifier modules in the circuit can meet the total load power of the current load.
It should be noted that the connection structure of single-ended input and multi-ended output refers to that the connection structure is connected with an external ac power supply through a rectifying module, and the connection of other rectifying modules is dependent on whether the connection between the other rectifying modules and the rectifying module is on or not.
As can be seen from the above, in the above embodiment of the present application, a plurality of rectifying modules form a single-ended input and multi-ended output connection structure, communication between a control main board and a load and between each rectifying module are established, the total power of the load currently connected to the load is obtained through the control main board, the number of rectifying modules required to supply power to the load is determined according to the total power of the load currently connected to the load, and after the number of rectifying modules required to supply power to the load is determined, the corresponding number of rectifying modules in the control circuit supply power to the load. It is easy to note that if the power supply power of the rectifier module connected in the current circuit is smaller than the total power of the load, the rectifier module not connected in the current circuit is controlled to be started; if the power supply power of the rectification module which is connected in the current circuit is equal to the total power of the load, the rectification module which is connected in the current circuit is maintained to supply power for the load; if the power supply power of the rectifier modules connected to the current circuit is larger than the total load power, the rectifier modules connected to the current circuit are controlled to be closed, the number of the rectifier modules which are opened or closed is determined according to the load power, and after the rectifier modules are opened or closed, the number of the rectifier modules in the current circuit can meet the total load power of the current load.
According to the scheme disclosed by the embodiment of the application, the purpose of selecting the number of the rectifying modules as required to supply power to the load according to the load condition is achieved, so that the technical effect of improving the energy utilization rate of the direct current system is achieved, and the technical problem that the energy utilization rate is not high due to the fact that information exchange cannot be carried out among all rectifying modes in the existing direct current electrical system is solved.
As an alternative embodiment, the losses of the circuit itself due to heating of the wires etc. are taken into account when calculating the number of rectifying modules for powering the load from the total power of the load.
In an alternative embodiment, as shown in fig. 9, the at least one rectifying module 1 is connected according to a tree topology, an input end of the rectifying module located on a root node in the tree topology is connected to an external ac power source 4, an output end of the rectifying module located on each stage node in the tree topology is connected to a load 3, and the control main board 2 is connected to the rectifying module 1 located on each stage node in the tree topology.
Specifically, the plurality of rectifying modules are connected according to a tree topology structure, in the circuit, an input end of the rectifying module located on a root node in the tree topology structure can be connected with an external alternating current power supply, and an output end of the rectifying module located on each stage of node in the tree topology structure can be connected with a load.
Based on the above embodiment, as an optional implementation manner, in the process of determining the number of rectifying modules for supplying power to the load according to the total power of the load, under a default condition, the first-stage rectifying module may be started first, that is, only the first-stage rectifying module is connected to the circuit to supply power to the load, so as to obtain the power supply of the first-stage rectifying module in the tree topology structure, detect the current load power in real time, determine whether the total power of the load is greater than the power supply that can be provided by the first-stage rectifying module, if the total power of the load is greater than the power supply of the first-stage rectifying module, one or more rectifying modules of the next stage of the first-stage rectifying module are started, and if the total power of the load is less than or equal to the power supply of the first-stage rectifying module, the first-stage rectifying module is controlled to supply power to the load.
It should be noted that if the first stage rectifying module includes a plurality of rectifying modules (i.e., the first stage rectifying module is a rectifying module above the second stage in the tree topology), when the total power of the load is smaller than the power supply of the first stage rectifying module, a part of the rectifying modules on the same stage may be selectively turned off, so long as the number of rectifying modules in the circuit is ensured to satisfy the total power of the load of the current load.
In an alternative embodiment, after the second stage rectifying module is turned on if the total load power is greater than the power supplied by the first stage rectifying module, the total load power of the current load is continuously detected in real time, and if the total load power of the current load is reduced (possibly, a user turns off part of the electric equipment) and is less than or equal to the power supplied by the first stage rectifying module, the second stage rectifying module is turned off. Alternatively, if the total load power of the current load is reduced but still greater than the power supplied by the first stage rectifier module, it may be selected to turn off part of the rectifier modules in the first stage rectifier module, as long as it is ensured that the number of rectifier modules in the circuit can meet the total load power of the current load.
By the embodiment, the purpose of adjusting the number of the rectifying modules for supplying power to the load according to the load power detected in real time can be realized in the power supply process.
In an alternative embodiment, as shown in fig. 9, the above system further includes: the at least one detecting device 5 is connected between the upper stage rectifying module and the lower stage rectifying module in the tree topology structure and is used for detecting at least one of the following data between the loss condition of the direct current electric system and the rectifying module: voltage, current, power, harmonics, and wire temperature.
Optionally, the detection device includes at least one of: voltage sensor, current sensor, power sensor, harmonic detection sensor and temperature sensor.
In an alternative embodiment, the detecting device 5 is connected to the input terminal of the control motherboard 2 through the rectifying module 1, and is used for feeding back the loss condition of the dc electrical system to the control motherboard 2.
In an alternative embodiment, as shown in fig. 9, the above system further includes: and the display device 6 is connected with the output end of the control main board and is used for displaying the loss condition of the direct current electric system.
In an alternative embodiment, the system further comprises: and the switch module is connected with the input end of the at least one rectifying module and is used for switching on or switching off the at least one rectifying module.
Optionally, the system further comprises: and the power line is used for communication among the rectifying modules, between the rectifying modules and the control main board and between the rectifying modules and the load.
There is also provided in accordance with an embodiment of the present invention an electrical system including a control system for any of the above-described alternative or preferred dc electrical systems.
Example 3
According to an embodiment of the present invention, there is further provided an embodiment of a device for implementing the method for controlling a dc electrical system, and fig. 10 is a schematic diagram of a control device for a dc electrical system according to an embodiment of the present invention, as shown in fig. 10, where the device includes: a first acquisition module 1001, a first determination module 1003, and a control module 1005.
The first obtaining module 1001 is configured to obtain a total load power of a current load, where the total load power is a sum of powers of one or more loads currently in a working state; a first determining module 1003, configured to determine at least one rectifying module for supplying power to the load according to the total power of the load; a control module 1005 for controlling the at least one rectifying module to supply power to one or more loads.
In an alternative embodiment, the first determining module includes: the first judging module is used for judging whether the total power of the load is larger than the current total power of power supply, wherein the total power of the power supply is the sum of the power supply power provided by the current one or more rectifying modules; and the second determining module is used for determining at least one rectifying module for supplying power to the load according to the judging result.
In an alternative embodiment, the second determining module includes: the first execution module is used for increasing the number of rectifying modules for supplying power to the load if the total power of the load is larger than the current total power of the power supply; the second execution module is used for maintaining the number of the rectifying modules for supplying power to the load unchanged if the total power of the load is equal to the current total power of the power supply; and the third execution module is used for reducing the number of rectifying modules for supplying power to the load if the total power of the load is smaller than the current total power of the power supply.
In an alternative embodiment, the apparatus further comprises: and the second acquisition module is used for acquiring the total power of the power supply of the current rectification module.
In an alternative embodiment, the rectifying module includes: and the plurality of rectifying modules are connected according to a tree topology, wherein each rectifying module of the upper stage in the tree topology is connected with the plurality of rectifying modules of the lower stage.
In an alternative embodiment, the first determining module includes: the second judging module is used for judging whether the total power of the load is larger than the power supply power of the first-stage rectifying module; the fourth execution module is used for starting a second-stage rectification module if the total load power is larger than the power supply power of the first-stage rectification module, wherein the second-stage rectification module is one or more rectification modules of the next stage of the first-stage rectification module; and the fifth execution module is used for controlling the first-stage rectification module to supply power for the load if the total power of the load is smaller than or equal to the power supply power of the first-stage rectification module.
In an alternative embodiment, the apparatus further comprises: the detection module is used for detecting the total load power of the current load in real time; and the sixth execution module is used for closing the second-stage rectification module if the total load power of the current load is reduced and is smaller than or equal to the power supply power of the first-stage rectification module.
According to an embodiment of the present application, there is also provided a storage medium including a stored program, wherein the program executes the control method of any one of the alternative or preferred direct current electrical systems of embodiment 1.
According to an embodiment of the present application, there is also provided a processor for running a program, wherein the program when run performs the method for controlling the optional or preferred dc electrical system of any one of embodiment 1.
The foregoing embodiment numbers of the present application are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
In the foregoing embodiments of the present application, the descriptions of the embodiments are emphasized, and for a portion of this disclosure that is not described in detail in this embodiment, reference is made to the related descriptions of other embodiments.
In the several embodiments provided in the present application, it should be understood that the disclosed technology may be implemented in other manners. The above-described embodiments of the apparatus are merely exemplary, and the division of the units, for example, may be a logic function division, and may be implemented in another manner, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interfaces, units or modules, or may be in electrical or other forms.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated units, if implemented in the form of software functional units and sold or controlled as separate products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied essentially or in part or all of the technical solution or in part in the form of a software product stored in a storage medium, including instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a removable hard disk, a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.

Claims (14)

1. A control method of a direct current electrical system, comprising:
acquiring the total load power of a current load, wherein the total load power is the sum of the power of one or more loads currently in a working state;
determining at least one rectifying module for supplying power to the load according to the total power of the load;
determining at least one rectifying module for supplying power to the load according to the total power of the load, wherein the rectifying module comprises the following components:
acquiring the current total power of power supply, wherein the total power of power supply is the sum of power supply power provided by one or more current access rectifying modules;
judging whether the total power of the load is larger than the total power of the power supply or not;
according to the judging result, determining at least one rectifying module for supplying power to the load;
controlling the at least one rectifying module to supply power to the one or more loads;
the rectifying module includes: the system comprises a plurality of rectification modules connected according to a tree topology structure, wherein each rectification module of a previous stage in the tree topology structure is connected with a plurality of rectification modules of a next stage;
Determining at least one rectifying module for supplying power to the load according to the total power of the load, wherein the rectifying module comprises the following components: obtaining the power supply power of a first-stage rectifying module in the tree topology structure; judging whether the total power of the load is larger than the power supply power of the first-stage rectifying module or not; if the total power of the load is larger than the power supply power of the first-stage rectifying module, starting a second-stage rectifying module, wherein the second-stage rectifying module is one or more rectifying modules of the next stage of the first-stage rectifying module; if the total power of the load is smaller than or equal to the power supply power of the first-stage rectifying module, the first-stage rectifying module is controlled to supply power for the load;
after turning on a second stage rectifier module if the total load power is greater than the power supplied by the first stage rectifier module, comprising: detecting the total load power of the current load in real time; and if the total load power of the current load is reduced and is smaller than or equal to the power supply power of the first-stage rectifying module, closing the second-stage rectifying module.
2. The method of claim 1, wherein determining at least one rectifier module to power the load based on the determination comprises:
If the total power of the load is larger than the current total power of the power supply, increasing the number of rectifying modules for supplying power to the load;
if the total power of the load is equal to the current total power of the power supply, maintaining the number of rectifying modules for supplying power to the load unchanged;
and if the total power of the load is smaller than the current total power of the power supply, reducing the number of rectifying modules for supplying power to the load.
3. A control system for a direct current electrical system, comprising:
the device comprises at least one rectifying module, a power supply module and a control module, wherein the at least one rectifying module is used for supplying power to a load, the at least one rectifying module forms a single-end input and multi-end output connecting structure, a single input end of the connecting structure is connected with an external alternating current power supply, and a plurality of output ends of the connecting structure are connected with the load;
the control main board is connected with the at least one rectifying module and is used for acquiring the total load power of a current load, and determining the at least one rectifying module for supplying power to the load according to the total load power, wherein the total load power is the sum of the power of one or more loads in a current working state;
the control main board is further used for obtaining the current total power of power supply, wherein the total power of power supply is the sum of power supply power provided by one or more current access rectifying modules;
Judging whether the total power of the load is larger than the total power of the power supply or not;
according to the judging result, determining at least one rectifying module for supplying power to the load;
the at least one rectifying module is connected according to a tree topology structure, the input end of the rectifying module positioned on a root node in the tree topology structure is connected with an external alternating current power supply, the output end of the rectifying module positioned on each stage of node in the tree topology structure is connected with the load, and the control main board is connected with the rectifying module positioned on each stage of node in the tree topology structure;
the control main board is also used for: obtaining the power supply power of a first-stage rectifying module in the tree topology structure; judging whether the total power of the load is larger than the power supply power of the first-stage rectifying module or not; if the total power of the load is larger than the power supply power of the first-stage rectifying module, starting a second-stage rectifying module, wherein the second-stage rectifying module is one or more rectifying modules of the next stage of the first-stage rectifying module; if the total power of the load is smaller than or equal to the power supply power of the first-stage rectifying module, the first-stage rectifying module is controlled to supply power for the load;
The control main board is also used for: detecting the total load power of the current load in real time; and if the total load power of the current load is reduced and is smaller than or equal to the power supply power of the first-stage rectifying module, closing the second-stage rectifying module.
4. A system according to claim 3, wherein the system further comprises:
the at least one detection device is connected between the upper stage rectification module and the lower stage rectification module in the tree topology structure and is used for detecting at least one of the following data between the loss condition of the direct current electric system and the rectification modules: voltage, current, power, harmonics, and wire temperature.
5. The system of claim 4, wherein the detection device comprises at least one of: voltage sensor, current sensor, power sensor, harmonic detection sensor and temperature sensor.
6. The system of claim 4, wherein the detecting device is connected to an input terminal of the control motherboard through the rectifying module, and is configured to feed back a loss condition of the dc electrical system to the control motherboard.
7. The system of claim 6, wherein the system further comprises: and the display device is connected with the output end of the control main board and is used for displaying the loss condition of the direct current electric system.
8. A system according to claim 3, wherein the system further comprises: and the switch module is connected with the input end of the at least one rectifying module and is used for switching on or switching off the at least one rectifying module.
9. The system of claim 3, wherein the control motherboard further comprises: and the calculation module is used for calculating the power supply power for supplying power to the load.
10. The system according to any one of claims 3 to 9, wherein the system further comprises: and the power line is used for communication among the rectifying modules, between the rectifying modules and the control main board, and between the rectifying modules and the load.
11. An electrical system comprising a control system of the direct current electrical system of any one of claims 3 to 10.
12. A control device for a direct current electric system, comprising:
the first acquisition module is used for acquiring the total load power of the current load, wherein the total load power is the sum of the powers of one or more loads in a current working state;
the first determining module is used for determining at least one rectifying module for supplying power to the load according to the total power of the load;
The first determining module includes: acquiring the current total power of power supply, wherein the total power of power supply is the sum of power supply power provided by one or more current access rectifying modules; the first judging module is used for judging whether the total power of the load is larger than the total power of the power supply, wherein the total power of the power supply is the sum of the power supply power provided by the one or more rectification modules which are connected at present; the second determining module is used for determining at least one rectifying module for supplying power to the load according to the judging result;
a control module for controlling the at least one rectifying module to supply power to the one or more loads;
the rectifying module includes: the system comprises a plurality of rectification modules connected according to a tree topology structure, wherein each rectification module of a previous stage in the tree topology structure is connected with a plurality of rectification modules of a next stage;
the first determining module is further configured to obtain a power supply of a first stage rectification module in the tree topology, where the first determining module includes: the second judging module is used for judging whether the total power of the load is larger than the power supply power of the first-stage rectifying module; the fourth execution module is used for starting a second-stage rectification module if the total load power is larger than the power supply power of the first-stage rectification module, wherein the second-stage rectification module is one or more rectification modules of the next stage of the first-stage rectification module; the fifth execution module is used for controlling the first-stage rectification module to supply power for the load if the total power of the load is smaller than or equal to the power supply power of the first-stage rectification module;
The apparatus further comprises: the detection module is used for detecting the total load power of the current load in real time; and the sixth execution module is used for closing the second-stage rectification module if the total load power of the current load is reduced and is smaller than or equal to the power supply power of the first-stage rectification module.
13. A storage medium comprising a stored program, wherein the program performs the control method of the direct current electrical system according to any one of claims 1 to 2.
14. A processor, characterized in that the processor is adapted to run a program, wherein the program when run performs the control method of the direct current electrical system according to any one of claims 1 to 2.
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103236712A (en) * 2013-04-08 2013-08-07 嘉兴清源电气科技有限公司 Direct-current micro-grid system and control method thereof
CN104092303A (en) * 2014-07-03 2014-10-08 内蒙古大学 Energy management and coordination control system and method for wind and solar energy distributed power generation independent micro grid
CN105529699A (en) * 2014-09-28 2016-04-27 艾默生网络能源有限公司 AC/DC device, power distribution system and control method thereof
CN206775126U (en) * 2017-04-25 2017-12-19 珠海格力电器股份有限公司 The control system and electrical system of DC electrical system

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2389714B1 (en) * 2009-01-26 2019-07-24 Geneva Cleantech Inc. Methods and apparatus for power factor correction and reduction of distortion in and noise in a power supply delivery network
US8803485B2 (en) * 2009-03-25 2014-08-12 Alieva, Inc. High efficiency adaptive power conversion system and method of operation thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103236712A (en) * 2013-04-08 2013-08-07 嘉兴清源电气科技有限公司 Direct-current micro-grid system and control method thereof
CN104092303A (en) * 2014-07-03 2014-10-08 内蒙古大学 Energy management and coordination control system and method for wind and solar energy distributed power generation independent micro grid
CN105529699A (en) * 2014-09-28 2016-04-27 艾默生网络能源有限公司 AC/DC device, power distribution system and control method thereof
CN206775126U (en) * 2017-04-25 2017-12-19 珠海格力电器股份有限公司 The control system and electrical system of DC electrical system

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