CN116316825B - Power control method, device, electronic equipment and storage medium - Google Patents
Power control method, device, electronic equipment and storage medium Download PDFInfo
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- CN116316825B CN116316825B CN202310159252.8A CN202310159252A CN116316825B CN 116316825 B CN116316825 B CN 116316825B CN 202310159252 A CN202310159252 A CN 202310159252A CN 116316825 B CN116316825 B CN 116316825B
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
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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
- H02J1/109—Scheduling or re-scheduling the operation of the DC sources in a particular order, e.g. connecting or disconnecting the sources in sequential, alternating or in subsets, to meet a given demand
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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
- H02J1/14—Balancing the load in a network
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
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Abstract
The application relates to a power control method, a device, an electronic device and a storage medium, wherein the method comprises the following steps: and acquiring a first system parameter, wherein the first system parameter is the alternating current load power and the direct current load power of the branch circuit. The first system parameters are summarized and calculated to obtain the initial conversion power of the A C/D C converter. And transmitting a power conversion instruction and initial conversion power to the second energy management end, wherein the power conversion instruction is used for instructing the second energy management end to control the corresponding A C/D C converter to perform bidirectional power conversion of alternating current and direct current according to the value of the initial conversion power. When the initial conversion power is larger than the first threshold, the power conversion instruction is used for instructing the second energy management end to control the A C/D C converter to convert the direct current power of the corresponding branch into the alternating current power, and when the initial conversion power is smaller than the first threshold, the power conversion instruction is used for instructing the second energy management end to control the AC/DC converter to convert the alternating current power of the corresponding branch into the direct current power.
Description
Technical Field
The present application relates to the field of ac/dc converter technologies, and in particular, to a power control method, apparatus, electronic device, and storage medium.
Background
With the continued development of renewable energy sources and the requirements of the existing power grid technology upgrading and the like, the future development of flexible direct current power transmission is continuously concentrated on the aspects of networking and concentrated delivery of wind power plants, interconnection of regional power grids, power transmission of urban central loads and the like. In many cases, these applications need to implement multiple power inputs and multiple drop point power supplies, which requires ac/dc conversion or even ac/dc conversion networking technology.
At present, the existing AC/DC converter system is often operated independently or simply started. The system does not have the capability of automatic balanced adjustment, so that the power mutual power and power failure support among all the areas cannot be realized, and the performance of a power grid and the adjustment capability of a networking system cannot be fully exerted. Because of the limitation of the capacity of the transformer at the alternating current side, in networking work, the single-path alternating current load should not exceed the capacity of the transformer, but the common alternating current-direct current converter system is difficult to realize in the aspect of controlling the load balance at the alternating current side, so that the overload risk cannot be effectively avoided to a certain extent. In addition, because the transformer is designed according to the highest alternating current line capacity in the networking, if the unbalance phenomenon is serious, the design capacity of the transformer is required to be larger than the capacity of the path with the largest current capacity in the networking, and the design mode improves the cost to a certain extent and simultaneously causes the waste of other branches.
Disclosure of Invention
Based on this, it is necessary to provide a power control method, apparatus, electronic device and storage medium, which can realize load balancing on the ac side by ac load balancing control to reduce the risk of overload tripping and ensure the load balancing of other branches to a greater extent, reduce the design capacity of the transformer, and further reduce the use cost thereof.
In a first aspect, the present application provides a power control method, applied to a first energy management end, where the method includes:
acquiring first system parameters, wherein the first system parameters are the alternating current load power and the direct current load power of a branch circuit;
summarizing and calculating the first system parameters to obtain initial conversion power of the AC/DC converter;
transmitting a power conversion instruction and the initial conversion power to a second energy management end, wherein the power conversion instruction is used for instructing the second energy management end to control a corresponding A C/DC converter to perform bidirectional power conversion of alternating current and direct current according to the value of the initial conversion power;
when the initial conversion power is larger than a first threshold, the power conversion instruction is used for instructing the second energy management end to control the A C/D C converter to convert the direct current power of the corresponding branch into alternating current power, and when the initial conversion power is smaller than the first threshold, the power conversion instruction is used for instructing the second energy management end to control the AC/DC converter to convert the alternating current power of the corresponding branch into direct current power.
In one embodiment, the calculating the initial conversion power of the A C/D C converter based on the first system parameter includes:
and calculating the total power of the alternating current load power and the direct current load power, calculating the average power of the alternating current load power and the direct current load power according to the total power, and calculating the initial conversion power of the AC/DC converter according to the average power.
In one embodiment, the calculating the first system parameter summary to obtain the initial conversion power of the A C/D C converter further includes:
when the system establishes a steady state, obtaining the maximum value and the minimum value of the alternating current power through summarizing calculation, calculating the average value between the maximum value and the minimum value of the alternating current power when the difference value between the maximum value and the minimum value of the alternating current power is larger than a second threshold value, and calculating the initial conversion power of the AC/DC converter based on the average value;
wherein the maximum and minimum values of the alternating current power are the maximum and minimum values of the addition of the alternating current load power and the direct current load power of a single branch.
In one embodiment, the transmitting the power conversion instruction and the initial conversion power to the second energy management side includes:
And when the system establishes a steady state, if the sending time of the power conversion instruction exceeds a third threshold value, re-acquiring the first system parameters and summarizing the system parameters.
In a second aspect, the present application provides a power control method, applied to a second energy management end, where the method includes:
collecting and transmitting a first system parameter to a first energy management end, wherein the first system parameter is alternating current load power and direct current load power of a branch where the second energy management end is located, and the first energy management end is used for summarizing and calculating the first system parameter to obtain initial conversion power of a A C/D C converter;
receiving a power conversion instruction and initial conversion power, wherein the power conversion instruction is used for controlling a corresponding A C/D C converter to perform bidirectional power conversion of alternating current and direct current according to the value of the initial conversion power;
and when the initial conversion power is smaller than the first threshold value, controlling the AC/DC converter to convert the alternating current power in the corresponding branch circuit into the direct current power.
In one embodiment, the receiving the power conversion instruction and the initial conversion power includes:
and when the system establishes a steady state, if the receiving time of the power conversion instruction exceeds a second threshold value, retransmitting the first system parameter.
In a third aspect, the present application provides a power control apparatus applied to a first energy management terminal, the apparatus comprising:
the first acquisition module is used for acquiring first system parameters, wherein the first system parameters are the alternating current load power and the direct current load power of the branch circuit;
the data processing module is used for summarizing and calculating the first system parameters to obtain the initial conversion power of the A C/D C converter;
the first transmitting module is used for transmitting a power conversion instruction and the initial conversion power to the second energy management end, wherein the power conversion instruction is used for instructing the second energy management end to control the corresponding AC/DC converter to perform bidirectional power conversion of alternating current and direct current according to the value of the initial conversion power;
the instruction judging module is configured to instruct the second energy management end to control the A C/D C converter to convert the dc power of the corresponding branch into the ac power when the initial conversion power is greater than a first threshold, and instruct the second energy management end to control the A C/D C converter to convert the ac power of the corresponding branch into the dc power when the initial conversion power is less than the first threshold.
In a fourth aspect, the present application provides a power control apparatus applied to a second energy management terminal, the apparatus comprising:
the second sending module is used for collecting and sending first system parameters to a first energy management end, wherein the first system parameters are alternating current load power and direct current load power of a branch where the second energy management end is located, and the first energy management end is used for summarizing and calculating the first system parameters to obtain initial conversion power of the A C/DC converter;
the first receiving module is used for receiving a power conversion instruction and initial conversion power, wherein the power conversion instruction is used for controlling the corresponding A C/D C converter to perform bidirectional power conversion of alternating current and direct current according to the value of the initial conversion power;
and the first control module is used for controlling the A C/D C converter to convert the direct current power in the corresponding branch circuit into the alternating current power when the initial conversion power is larger than a first threshold value, and controlling the A C/D C converter to convert the alternating current power in the corresponding branch circuit into the direct current power when the initial conversion power is smaller than the first threshold value.
In a fifth aspect, the present application provides an electronic device comprising a memory storing a computer program and a processor implementing the following steps when executing the computer program:
Acquiring first system parameters, wherein the first system parameters are the alternating current load power and the direct current load power of a branch circuit;
summarizing and calculating the first system parameters to obtain initial conversion power of the AC/DC converter;
transmitting a power conversion instruction and the initial conversion power to a second energy management end, wherein the power conversion instruction is used for instructing the second energy management end to control a corresponding A C/DC converter to perform bidirectional power conversion of alternating current and direct current according to the value of the initial conversion power;
when the initial conversion power is greater than a first threshold, the power conversion instruction is used for instructing the second energy management end to control the A C/D C converter to convert the direct current power of the corresponding branch into alternating current power, and when the initial conversion power is less than the first threshold, the power conversion instruction is used for instructing the second energy management end to control the A C/D C converter to convert the alternating current power of the corresponding branch into direct current power; or (b)
Collecting and transmitting a first system parameter to a first energy management end, wherein the first system parameter is alternating current load power and direct current load power of a branch where the second energy management end is located, and the first energy management end is used for summarizing and calculating the first system parameter to obtain initial conversion power of a A C/D C converter;
Receiving a power conversion instruction and initial conversion power, wherein the power conversion instruction is used for controlling a corresponding A C/D C converter to perform bidirectional power conversion of alternating current and direct current according to the value of the initial conversion power;
and when the initial conversion power is smaller than the first threshold value, controlling the AC/DC converter to convert the alternating current power in the corresponding branch circuit into the direct current power.
In a sixth aspect, the present application provides a computer storage medium storing a computer program which when executed by a processor performs the steps of:
acquiring first system parameters, wherein the first system parameters are the alternating current load power and the direct current load power of a branch circuit;
summarizing and calculating the first system parameters to obtain initial conversion power of the AC/DC converter;
transmitting a power conversion instruction and the initial conversion power to a second energy management end, wherein the power conversion instruction is used for instructing the second energy management end to control a corresponding A C/DC converter to perform bidirectional power conversion of alternating current and direct current according to the value of the initial conversion power;
When the initial conversion power is greater than a first threshold, the power conversion instruction is used for instructing the second energy management end to control the A C/D C converter to convert the direct current power of the corresponding branch into alternating current power, and when the initial conversion power is less than the first threshold, the power conversion instruction is used for instructing the second energy management end to control the A C/D C converter to convert the alternating current power of the corresponding branch into direct current power; or (b)
Collecting and transmitting a first system parameter to a first energy management end, wherein the first system parameter is alternating current load power and direct current load power of a branch where the second energy management end is located, and the first energy management end is used for summarizing and calculating the first system parameter to obtain initial conversion power of a A C/D C converter;
receiving a power conversion instruction and initial conversion power, wherein the power conversion instruction is used for controlling a corresponding A C/D C converter to perform bidirectional power conversion of alternating current and direct current according to the value of the initial conversion power;
and when the initial conversion power is smaller than the first threshold value, controlling the AC/DC converter to convert the alternating current power in the corresponding branch circuit into the direct current power.
According to the power control method, the device, the electronic equipment and the storage medium, the primary energy management end gathers and calculates the alternating current load power and the direct current load power on the branch, initial conversion power of the A C/D C converter is obtained, a power conversion instruction is sent to the secondary energy management end according to the initial conversion power of the A C/D C converter, and the secondary energy management end controls the A C/D C converter to perform corresponding bidirectional power conversion of alternating current and direct current according to the initial conversion power. According to the method, through alternating current load balance control, load balance of an alternating current side is achieved, design capacity of an alternating current transformer is reduced, and further risk of overload tripping is reduced, the design of a master-slave energy management end ensures load balance of other branches to the greatest extent, and the reduction of the capacity of the transformer reduces use cost of the method to a certain extent.
Drawings
FIG. 1 is a flow chart of a power control method according to an embodiment of the present application;
FIG. 2 is a flow chart of a power control method according to an embodiment of the present application;
FIG. 3 is a flow chart of a power control method according to an embodiment of the present application;
FIG. 4 is a flow chart of a power control method according to an embodiment of the present application;
FIG. 5 is a schematic diagram of a system configuration in a power control scheme according to an embodiment of the present application;
fig. 6 is a flow chart of a power control scheme of the present embodiment;
FIG. 7 is a schematic diagram of a power control device according to an embodiment of the present application;
FIG. 8 is a schematic diagram of a power control device according to an embodiment of the present application;
FIG. 9 is a schematic diagram of a power control device according to an embodiment of the present application;
FIG. 10 is a schematic diagram of a power control device according to an embodiment of the present application;
fig. 11 is an internal structural view of a computer device according to an embodiment of the present application.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
First, the proper nouns appearing in the present application will be described in relation to:
AC/DC converter networking device: and the networking control device is used for realizing AC/DC energy conversion between the transformer areas.
AC/DC converter: the power conversion device can also be written into an ACDC converter or an ACDC, is a key component of an AC/DC converter networking device, and has the main function of realizing bidirectional power conversion between AC and DC according to a scheduling command of an EMS.
EMS: (Energy Management System) an energy management system responsible for monitoring and scheduling control of all components within the networking device.
As shown in fig. 1, in one embodiment, a power control method is applied to a first energy management end, and includes the following steps:
step S110, a first system parameter is obtained, wherein the first system parameter is the alternating current load power and the direct current load power of the branch circuit.
Specifically, the first energy management end is used as a main energy management end to acquire alternating current load power and direct current load power of each branch collected by the slave energy management end.
Step S120, the first system parameters are summarized and calculated to obtain the initial conversion power of the AC/DC converter.
Specifically, the main energy management end performs a summary calculation on the AC load power and the DC load power obtained in step S110, so as to obtain an initial conversion power of the AC/DC converter.
Step S130, a power conversion instruction and an initial conversion power are sent to the second energy management end, where the power conversion instruction is used to instruct the second energy management end to control the corresponding AC/DC converter to perform bidirectional power conversion of alternating current and direct current according to the value of the initial conversion power.
Specifically, the master energy management end sends a power conversion instruction and an initial conversion power of the AC/DC converter to the slave energy management end according to the summary calculation result in step S120, where the power conversion instruction is used to control the slave energy management end to perform bidirectional power conversion of AC and DC by using the corresponding AC/DC converter according to the magnitude instruction of the initial conversion power value.
In step S140, when the initial conversion power is greater than the first threshold, the power conversion instruction is used to instruct the second energy management end to control the AC/DC converter to convert the DC power of the corresponding branch into the AC power, and when the initial conversion power is less than the first threshold, the power conversion instruction is used to instruct the second energy management end to control the AC/DC converter to convert the AC power of the corresponding branch into the DC power.
Specifically, when the initial conversion power sent by the main energy management end in step S130 is greater than the first threshold, the slave energy management end is instructed to control the corresponding AC/DC converter to convert the DC power in the corresponding branch into the AC power, and when the initial conversion power sent by the main energy management end in step S130 is less than the first threshold, the slave energy management end is instructed to control the corresponding AC/DC converter to convert the AC power in the corresponding branch into the DC power.
The first threshold is a critical value of the AC/DC converter for bidirectional power conversion of AC and DC.
According to the power control method, the primary energy management end collects and calculates the alternating current load power and the direct current load power on the branch, initial conversion power of the AC/DC converter is obtained, a power conversion instruction is sent to the secondary energy management end according to the initial conversion power of the AC/DC converter, and the secondary energy management end controls the AC/DC converter to perform corresponding bidirectional power conversion of alternating current and direct current according to the initial conversion power. According to the method, through alternating current load balance control, load balance of an alternating current side is achieved, design capacity of an alternating current transformer is reduced, and further risk of overload tripping is reduced, the design of a master-slave energy management end ensures load balance of other branches to the greatest extent, and the reduction of the capacity of the transformer reduces use cost of the method to a certain extent.
As shown in fig. 2, in one embodiment, a power control method is applied to a first energy management end, and includes the following steps:
step S2 0, obtaining a first system parameter, wherein the first system parameter is the alternating current load power and the direct current load power of the branch circuit.
Specifically, the first energy management end is used as a main energy management end to acquire alternating current load power and direct current load power of each branch collected by the slave energy management end.
Step S2 0, obtaining the total power of the alternating current load power and the direct current load power through calculation, calculating the average power of the alternating current load power and the direct current load power according to the total power, and calculating the initial conversion power of the AC/DC converter according to the average power.
Specifically, the main energy management end obtains the total power of alternating current load power and direct current load power through calculation, obtains the average power of the alternating current load power and the direct current load power on each branch through calculation of the total power, and finally obtains the initial conversion power of the AC/DC converter according to calculation of the average power.
Step S2 3, when the system establishes a steady state, obtaining the maximum value and the minimum value of the alternating current power through summarizing calculation, calculating the average value between the maximum value and the minimum value of the alternating current power when the difference value between the maximum value and the minimum value of the alternating current power is larger than a second threshold value, and calculating the initial conversion power of the A C/D C converter based on the average value.
Specifically, when the system establishes a steady state, the main energy management end calculates the maximum value and the minimum value of the addition of the alternating current load power and the direct current load power of a single branch through summarization, the maximum value and the minimum value are respectively used as the maximum value and the minimum value of the alternating current power, when the difference value between the maximum value and the minimum value of the alternating current power is larger than a second threshold value, the average value between the maximum value and the minimum value of the alternating current power is calculated, and the initial conversion power of the AC/DC converter is calculated according to the average value.
In step S24, a power conversion command and an initial conversion power are sent to the second energy management terminal, where the power conversion command is used to instruct the second energy management terminal to control the corresponding AC/DC converter to perform bidirectional power conversion of AC and DC according to the value of the initial conversion power.
Specifically, the master energy management end sends a power conversion instruction and the initial conversion power of the A C/D C converter to the slave energy management end according to the initial conversion power obtained by summarizing calculation, wherein the power conversion instruction is used for controlling the corresponding A C/D C converter to perform bidirectional power conversion of alternating current and direct current according to the magnitude instruction of the initial conversion power value.
Step S2 0, when the system establishes a steady state, if the sending duration of the power conversion instruction exceeds a third threshold value, the first system parameters are acquired again and summarized and calculated.
Specifically, when the system establishes a steady state, if the sending duration of the power conversion instruction exceeds the set duration, the first system parameter is acquired again and summarized and calculated.
In step S2 0, when the initial conversion power is greater than the first threshold, the power conversion instruction is used to instruct the second energy management end to control the A C/D C converter to convert the DC power of the corresponding branch into the AC power, and when the initial conversion power is less than the first threshold, the power conversion instruction is used to instruct the second energy management end to control the AC/DC converter to convert the AC power of the corresponding branch into the DC power.
Specifically, when the initial conversion power sent by the main energy management end is greater than the first threshold, the auxiliary energy management end is instructed to control the corresponding A C/D C converter to convert the direct current power in the corresponding branch circuit into the alternating current power, and when the initial conversion power sent by the main energy management end is less than the first threshold, the auxiliary energy management end is instructed to control the corresponding A C/D C converter to convert the alternating current power in the corresponding branch circuit into the direct current power.
The first threshold is a critical value for the converter A C/D C to perform bidirectional power conversion of alternating current and direct current.
According to the power control method, the primary energy management end collects and calculates the alternating current load power and the direct current load power on the branch, initial conversion power of the A C/D C converter is obtained, a power conversion instruction is sent to the secondary energy management end according to the initial conversion power of the A C/D C converter, and the secondary energy management end controls the A C/D C converter to perform corresponding bidirectional power conversion of alternating current and direct current according to the initial conversion power. According to the method, through alternating current load balance control, load balance of an alternating current side is achieved, design capacity of an alternating current transformer is reduced, and further risk of overload tripping is reduced, the design of a master-slave energy management end ensures load balance of other branches to the greatest extent, and the reduction of the capacity of the transformer reduces use cost of the method to a certain extent.
As shown in fig. 3, in one embodiment, a power control method is applied to a second energy management terminal, and includes the following steps:
step S3 0, collecting and sending a first system parameter to a first energy management end, where the first system parameter is an AC load power and a DC load power of a branch where a second energy management end is located, and the first energy management end is configured to perform summary calculation on the first system parameter to obtain an initial conversion power of the AC/DC converter.
Specifically, the second energy management end is used as a slave energy management end to collect the alternating current load power and the direct current load power corresponding to the branch where the second energy management end is located, and sends the alternating current load power and the direct current load power to the main energy management end, and the main energy management end is used for summarizing and calculating the received first system parameters to obtain the initial conversion power of the AC/DC converter.
In step S3 0, a power conversion command and an initial conversion power are received, where the power conversion command is used to control the corresponding A C/D C converter to perform bidirectional power conversion of alternating current and direct current according to the magnitude of the initial conversion power.
Specifically, the slave energy management end receives the power conversion instruction and the initial conversion power sent by the master energy management end, and controls the A C/D C converter to perform corresponding power conversion of alternating current and direct current according to the power conversion instruction and the initial conversion power value.
In step S3 0, when the initial conversion power is greater than the first threshold, the converter A C/D C is controlled to convert the DC power in the corresponding branch into the AC power, and when the initial conversion power is less than the first threshold, the converter AC/DC is controlled to convert the AC power in the corresponding branch into the DC power.
Specifically, when the initial conversion power received from the energy management end is greater than the first threshold, the corresponding A C/D C converter is controlled to convert the direct current power in the corresponding branch circuit into the alternating current power, and when the initial conversion power received from the energy management end is less than the first threshold, the corresponding A C/DC converter is controlled to convert the alternating current power in the corresponding branch circuit into the direct current power.
According to the power control method, the primary energy management end collects and calculates the alternating current load power and the direct current load power on the branch, initial conversion power of the A C/D C converter is obtained, a power conversion instruction is sent to the secondary energy management end according to the initial conversion power of the A C/D C converter, and the secondary energy management end controls the A C/D C converter to perform corresponding bidirectional power conversion of alternating current and direct current according to the initial conversion power. According to the method, through alternating current load balance control, load balance of an alternating current side is achieved, design capacity of an alternating current transformer is reduced, and further risk of overload tripping is reduced, the design of a master-slave energy management end ensures load balance of other branches to the greatest extent, and the reduction of the capacity of the transformer reduces use cost of the method to a certain extent.
As shown in fig. 4, in one embodiment, a power control method is applied to a second energy management terminal, and includes the following steps:
step S4 1 0, collecting and sending first system parameters to a first energy management end, wherein the first system parameters are alternating current load power and direct current load power of a branch where a second energy management end is located, and the first energy management end is used for summarizing and calculating the first system parameters to obtain initial conversion power of the AC/DC converter.
Specifically, the second energy management end is used as a slave energy management end to collect the alternating current load power and the direct current load power corresponding to the branch where the second energy management end is located, and sends the alternating current load power and the direct current load power to the main energy management end, and the main energy management end is used for summarizing and calculating the received first system parameters to obtain the initial conversion power of the AC/DC converter.
In step S4 0, a power conversion command and an initial conversion power are received, where the power conversion command is used to control the corresponding A C/D C converter to perform bidirectional power conversion of alternating current and direct current according to the magnitude of the initial conversion power.
Specifically, the slave energy management end receives the power conversion instruction and the initial conversion power sent by the master energy management end, and controls the A C/D C converter to perform corresponding power conversion of alternating current and direct current according to the power conversion instruction and the initial conversion power value.
In step S4 0, when the system establishes a steady state, if the receiving duration of the power conversion command exceeds the second threshold, the first system parameter is retransmitted.
Specifically, when the slave energy management end does not receive the power conversion instruction within a specified time period, the first system parameter is collected again and sent to the master energy management end.
In step S4 0, when the initial conversion power is greater than the first threshold, the converter A C/D C is controlled to convert the DC power in the corresponding branch into the AC power, and when the initial conversion power is less than the first threshold, the converter AC/DC is controlled to convert the AC power in the corresponding branch into the DC power.
Specifically, when the initial conversion power received from the energy management end is greater than the first threshold, the corresponding A C/D C converter is controlled to convert the direct current power in the corresponding branch circuit into the alternating current power, and when the initial conversion power received from the energy management end is less than the first threshold, the corresponding A C/DC converter is controlled to convert the alternating current power in the corresponding branch circuit into the direct current power.
According to the power control method, the primary energy management end collects and calculates the alternating current load power and the direct current load power on the branch, initial conversion power of the A C/D C converter is obtained, a power conversion instruction is sent to the secondary energy management end according to the initial conversion power of the A C/D C converter, and the secondary energy management end controls the A C/D C converter to perform corresponding bidirectional power conversion of alternating current and direct current according to the initial conversion power. According to the method, through alternating current load balance control, load balance of an alternating current side is achieved, design capacity of an alternating current transformer is reduced, and further risk of overload tripping is reduced, the design of a master-slave energy management end ensures load balance of other branches to the greatest extent, and the reduction of the capacity of the transformer reduces use cost of the method to a certain extent.
As shown in fig. 5 and 6, in one embodiment, a power control scheme is applied to an ac/dc converter networking device, an EMS automatically determines a master or a slave through CAN communication, a cluster automatically allocates one master, and the other slaves, and the master is responsible for aggregating information and data. Working parameters of each unit are calculated according to a preset strategy, and the slave computer is responsible for collecting circuit parameters of the branch and feeding back to the host computer to control the AC/DC converter to perform bidirectional power conversion between alternating current and direct current according to instructions of the host computer.
It should be noted that, the EMS may collect the product serial numbers of other EMS through CAN communication, and automatically sequence, where the determination that the EMS product serial number is the smallest is the master, and the other is the slave.
After the AC load balance control is started, the EMS of the host computer gathers and calculates parameters of each branch of the system, which are acquired in real time:
(1)i.e. total power = alternating current power sum + direct current power sum.
(2)P AC_Average ＝P Total I.e. alternating current average power = total power/n, n representing the number of branches.
(3) Calculating initial conversion power of AC/DC converter of each branchThat is, the initial conversion power=alternating current average power of the AC/DC converter of a certain branch-the alternating current power of the AC/DC converter of the corresponding branch.
Based on the calculation result of the EMS of the host computer on the parameters of each branch of the system, a power conversion instruction and the initial power of the AC/DC converter are sent to the slave EMS of the corresponding branch of the AC/DC converter of each branch, and the slave EMS receives the power conversion instruction and then controls the slave EMSThe AC/DC converter performs bidirectional power conversion of alternating current and direct current. AC/DC converter according to power conversion instructionsPerforming bidirectional power conversion of alternating current and direct current when +.>When the slave EMS controls the corresponding AC/DC converter to convert the DC power into AC power, when +.>When the slave EMS is in operation, the slave EMS controls the corresponding AC/DC converter to convert the AC power into the DC power.
After the system establishes a steady state (delay T or judgment of fluctuation condition of alternating current branch), steady state self-adaptive control is carried out:
(1) The EMS of the host computer acquires parameters of each branch of the system in real time and performs summarizing calculation:
that is, ac power maximum value=max { branch ac power+dc power }, and the corresponding unit is denoted as X 1 ，That is, the minimum value of ac power=min { branch ac power+dc power }, and the corresponding unit is denoted as X 2 。
(2) If it isWherein, pth_control represents a start adjustment threshold, which is generally set to 5% of the transformer capacity, then the next calculation is performed, namely:
I.e. alternating current powerAverage = (alternating current power maximum value + alternating current average power minimum value)/2.
(3) Computer group X 1 And unit X 2 The conversion power of the AC/DC converter of (a):i.e. conversion power = ac average power-unit X 1 Is provided.
The calculation result of the EMS of the host machine based on the parameters of each branch of the system is sent to the unit X1 and the unit X 2 The slave EMS of the corresponding branch of the AC/DC converter sends a power conversion instruction and the conversion power of the AC/DC converter, and the slave EMS controls the AC/DC converter to perform bidirectional power conversion of alternating current and direct current after receiving the power conversion instruction. AC/DC converter according to power conversion instructionsPerforming bidirectional power conversion of alternating current and direct current when +.>When the slave EMS controls the corresponding AC/DC converter to convert the DC power into AC power, when +.>When the slave EMS is in operation, the slave EMS controls the corresponding AC/DC converter to convert the AC power into the DC power. In addition, if the slave EMS does not receive the corresponding power conversion instruction after the delay T, the host EMS performs summarizing calculation of the branch parameters again.
Support arbitrary alternating current return circuit disconnection, the automatic commentaries on classics area of afterload (alternating current switch K opens the back, and alternating current load is by the energy function of direct current return circuit contravariant automatically):
(1) The EMS of the host computer gathers and calculates the parameters of each branch of the system acquired in real time, when detecting K i When the circuit is tripped, the circuit is judged that the alternating current branch circuit is broken:
the load branch circuit for recording circuit breaking is X 1 ,X 2 ，...，X m And obtainTaking power for a period of time before the circuit break (this record is maintained after power-up, not taken after power-down, and not taken after power-down), asThe load transfer control of the respective branch is then immediately started.
(2) The host EMS gathers and calculates the parameters of each branch of the system acquired in real time:
i.e. total power = sum of ac power + sum of dc power, wherein +.>According to->And (5) assigning values.
P AC_Average ＝P Total (n-m), m representing the number of branches that are powered down, n representing the total number of branches, and calculating the initial conversion power of each AC/DC converter
Based on the calculation result of the EMS of the host computer on the parameters of each branch of the system, a power conversion instruction and the initial power of the AC/DC converter are sent to the slave EMS of the corresponding branch of the AC/DC converter of each branch, and the slave EMS controls the AC/DC converter to perform bidirectional power conversion of alternating current and direct current after receiving the power conversion instruction. AC/DC converter according to power conversion instructionsPerforming bidirectional power conversion of alternating current and direct current when +. >When the slave EMS controls the corresponding AC/DC converter to direct currentThe power is converted into an alternating current power when +.>When the slave EMS is in operation, the slave EMS controls the corresponding AC/DC converter to convert the AC power into the DC power.
According to the power control scheme, through alternating current load balance control, load balance of an alternating current side is achieved, design capacity of an alternating current transformer is reduced, probability of overload tripping is further reduced, continuous power supply after abnormal circuit breaking of an alternating current side of a certain branch is achieved through load transfer control, and meanwhile load balance of other branches is guaranteed to the greatest extent. In addition, the scheme adopts master-slave EMS to realize power conversion control, does not set a central master controller, has better cost advantage, and is more convenient for networking.
As shown in fig. 7, in one embodiment, a power control device is applied to a first energy management end, and includes a first acquisition module 710, a data processing module 720, a first sending module 730, and an instruction judging module 740.
The first obtaining module 710 is configured to obtain a first system parameter, where the first system parameter is an ac load power and a dc load power of the branch circuit.
The data processing module 720 is configured to calculate the first system parameter to obtain an initial conversion power of the AC/DC converter.
The first transmitting module 7 3 0 is configured to transmit a power conversion instruction and an initial conversion power to the second energy management end, where the power conversion instruction is configured to instruct the second energy management end to control the corresponding AC/DC converter to perform bidirectional power conversion of alternating current and direct current according to the magnitude of the initial conversion power.
The instruction determining module 7 4 0 is configured to instruct the second energy management end to control the A C/D C converter to convert the DC power of the corresponding branch into the AC power when the initial conversion power is greater than the first threshold, and instruct the second energy management end to control the AC/DC converter to convert the AC power of the corresponding branch into the DC power when the initial conversion power is less than the first threshold.
According to the power control device, the primary energy management end collects and calculates the alternating current load power and the direct current load power on the branch, initial conversion power of the A C/D C converter is obtained, a power conversion instruction is sent to the secondary energy management end according to the initial conversion power of the A C/D C converter, and the secondary energy management end controls the A C/D C converter to perform corresponding bidirectional power conversion of alternating current and direct current according to the initial conversion power. The device realizes the load balance of the alternating current side through the alternating current load balance control, reduces the design capacity of an alternating current transformer, further reduces the risk of overload tripping, ensures the load balance of other branches to the greatest extent by the design of the master-slave energy management end, and reduces the use cost of the device to a certain extent by the reduction of the capacity of the transformer.
As shown in fig. 8, in one embodiment, a power control apparatus, applied to a first energy management end, includes a first obtaining module 8 1 0, a first calculating module 80, a second calculating module 80, a first sending module 840, a first judging module 850, and an instruction judging module 860.
The first acquiring module 8 1 0 is configured to acquire a first system parameter, where the first system parameter is an ac load power and a dc load power of the branch circuit.
The first calculation module 8 2 0 is configured to obtain the total power of the AC load power and the DC load power by calculation, calculate the average power of the AC load power and the DC load power according to the total power, and calculate the initial conversion power of the AC/DC converter according to the average power.
The second calculation module 80 is configured to obtain, when the system establishes a steady state, a maximum value and a minimum value of the AC power through a summary calculation, and calculate an average value between the maximum value and the minimum value of the AC power when a difference value between the maximum value and the minimum value of the AC power is greater than a second threshold value, and calculate an initial conversion power of the AC/DC converter based on the average value.
The first transmitting module 840 is configured to transmit a power conversion instruction and an initial conversion power to the second energy management end, where the power conversion instruction is configured to instruct the second energy management end to control the corresponding AC/DC converter to perform bidirectional power conversion of alternating current and direct current according to the magnitude of the initial conversion power.
The first determining module 8 5 0 is configured to re-acquire the first system parameter and perform summary calculation on the first system parameter if the transmission duration of the power conversion command exceeds the third threshold when the system establishes a steady state.
The instruction determining module 8 6 0 is configured to instruct the second energy management terminal to control the A C/D C converter to convert the DC power of the corresponding branch circuit into the AC power when the initial conversion power is greater than the first threshold, and instruct the second energy management terminal to control the AC/DC converter to convert the AC power of the corresponding branch circuit into the DC power when the initial conversion power is less than the first threshold.
According to the power control device, the primary energy management end collects and calculates the alternating current load power and the direct current load power on the branch, initial conversion power of the A C/D C converter is obtained, a power conversion instruction is sent to the secondary energy management end according to the initial conversion power of the A C/D C converter, and the secondary energy management end controls the A C/D C converter to perform corresponding bidirectional power conversion of alternating current and direct current according to the initial conversion power. The device realizes the load balance of the alternating current side through the alternating current load balance control, reduces the design capacity of an alternating current transformer, further reduces the risk of overload tripping, ensures the load balance of other branches to the greatest extent by the design of the master-slave energy management end, and reduces the use cost of the device to a certain extent by the reduction of the capacity of the transformer.
As shown in fig. 9, in one embodiment, a power control apparatus, applied to a second energy management terminal, includes a second sending module 910, a first receiving module 920, and a first control module 930.
The second sending module 910 is configured to collect and send a first system parameter to the first energy management end, where the first system parameter is an ac load power and a dc load power of a branch where the second energy management end is located, and the first energy management end is configured to perform a summary calculation on the first system parameter to obtain an initial conversion power of the A C/D C converter.
The first receiving module 920 is configured to receive a power conversion instruction and an initial conversion power, where the power conversion instruction is configured to control the corresponding A C/D C converter to perform bidirectional power conversion of alternating current and direct current according to the magnitude of the initial conversion power.
The first control module 930 is configured to control the A C/D C converter to convert the DC power in the corresponding branch circuit into the AC power when the initial conversion power is greater than the first threshold value, and to control the AC/DC converter to convert the AC power in the corresponding branch circuit into the DC power when the initial conversion power is less than the first threshold value.
According to the power control device, the primary energy management end collects and calculates the alternating current load power and the direct current load power on the branch, initial conversion power of the A C/D C converter is obtained, a power conversion instruction is sent to the secondary energy management end according to the initial conversion power of the A C/D C converter, and the secondary energy management end controls the A C/D C converter to perform corresponding bidirectional power conversion of alternating current and direct current according to the initial conversion power. The device realizes the load balance of the alternating current side through the alternating current load balance control, reduces the design capacity of an alternating current transformer, further reduces the risk of overload tripping, ensures the load balance of other branches to the greatest extent by the design of the master-slave energy management end, and reduces the use cost of the device to a certain extent by the reduction of the capacity of the transformer.
As shown in fig. 10, in one embodiment, a power control device is applied to a second energy management terminal and includes a second sending module 10 10, a first receiving module 10 2 0, a second judging module 100 and a first control module 1040.
The second transmitting module 10 10 is configured to collect and transmit a first system parameter to the first energy management end, where the first system parameter is an ac load power and a dc load power of a branch where the second energy management end is located, and the first energy management end is configured to perform a summary calculation on the first system parameter to obtain an initial conversion power of the A C/D C converter.
The first receiving module 10 2 0 is configured to receive a power conversion command and an initial conversion power, where the power conversion command is configured to control the corresponding A C/D C converter to perform bidirectional power conversion of alternating current and direct current according to a magnitude of the initial conversion power.
The second determining module 100 is configured to resend the first system parameter when the system establishes a steady state and the receiving duration of the power conversion command exceeds the second threshold.
The first control module 1040 is configured to control the A C/D C converter to convert the dc power in the corresponding branch circuit into the ac power when the initial conversion power is greater than a first threshold value, and control the A C/D C converter to convert the ac power in the corresponding branch circuit into the dc power when the initial conversion power is less than the first threshold value.
According to the power control device, the primary energy management end collects and calculates the alternating current load power and the direct current load power on the branch, initial conversion power of the A C/D C converter is obtained, a power conversion instruction is sent to the secondary energy management end according to the initial conversion power of the A C/D C converter, and the secondary energy management end controls the A C/D C converter to perform corresponding bidirectional power conversion of alternating current and direct current according to the initial conversion power. The device realizes the load balance of the alternating current side through the alternating current load balance control, reduces the design capacity of an alternating current transformer, further reduces the risk of overload tripping, ensures the load balance of other branches to the greatest extent by the design of the master-slave energy management end, and reduces the use cost of the device to a certain extent by the reduction of the capacity of the transformer.
In one embodiment, a computer device is provided, which may be a smart terminal, and the internal structure thereof may be as shown in fig. 11. The computer device includes a processor, a memory, and a network interface connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement a power control method.
It will be appreciated by those skilled in the art that the structure shown in FIG. 11 is merely a block diagram of some of the structures associated with the present inventive arrangements and is not limiting of the computer device to which the present inventive arrangements may be applied, and that a particular computer device may include more or fewer components than shown, or may combine some of the components, or have a different arrangement of components.
In one embodiment, an electronic device includes a memory storing a computer program and a processor that implements the steps of the method embodiments described above when the computer program is executed. In one embodiment, a computer storage medium stores a computer program which, when executed by a processor, performs the steps of the method embodiments described above.
In one embodiment, a computer program product or computer program is provided that includes computer instructions stored in a computer readable storage medium. The processor of the computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device performs the steps in the above-described method embodiments.
Those skilled in the art will appreciate that implementing all or part of the above described methods may be accomplished by way of a computer program stored on a non-transitory computer readable storage medium, which when executed, may comprise the steps of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in embodiments provided herein may include non-volatile and/or volatile memory. The nonvolatile memory can include Read Only Memory (ROM), programmable ROM (PROM), electrically Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), memory bus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), among others.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (9)
1. A power control method, applied to a first energy management end, the method comprising:
acquiring first system parameters, wherein the first system parameters are the alternating current load power and the direct current load power of a branch circuit;
the first system parameter summarizing calculation is performed to obtain initial conversion power of the AC/DC converter, including: the total power of the alternating current load power and the direct current load power is obtained through calculation, the average power of the alternating current load power and the direct current load power is calculated according to the total power, and the initial conversion power of the AC/DC converter is calculated according to the average power;
Transmitting a power conversion instruction and the initial conversion power to a second energy management end, wherein the power conversion instruction is used for instructing the second energy management end to control a corresponding AC/DC converter to perform bidirectional power conversion of alternating current and direct current according to the value of the initial conversion power;
when the initial conversion power is smaller than the first threshold, the power conversion instruction is used for instructing the second energy management end to control the AC/DC converter to convert the AC power of the corresponding branch into the DC power.
2. The power control method of claim 1, wherein the calculating the first system parameter summary obtains an initial conversion power of the AC/DC converter, further comprising:
when the system establishes a steady state, obtaining the maximum value and the minimum value of the alternating current power through summarizing calculation, calculating the average value between the maximum value and the minimum value of the alternating current power when the difference value between the maximum value and the minimum value of the alternating current power is larger than a second threshold value, and calculating the initial conversion power of the AC/DC converter based on the average value;
Wherein the maximum and minimum values of the alternating current power are the maximum and minimum values of the addition of the alternating current load power and the direct current load power of a single branch.
3. The power control method according to claim 1, wherein the transmitting the power conversion instruction and the initial conversion power to the second energy management side comprises:
and when the system establishes a steady state, if the sending time of the power conversion instruction exceeds a third threshold value, re-acquiring the first system parameters and summarizing the system parameters.
4. A power control method, applied to a second energy management terminal, the method comprising:
collecting and sending a first system parameter to a first energy management end, wherein the first system parameter is alternating current load power and direct current load power of a branch where the second energy management end is located, and the first energy management end is used for summarizing and calculating the first system parameter to obtain initial conversion power of the AC/DC converter, and the method comprises the following steps: the total power of the alternating current load power and the direct current load power is obtained through calculation, the average power of the alternating current load power and the direct current load power is calculated according to the total power, and the initial conversion power of the AC/DC converter is calculated according to the average power;
Receiving a power conversion instruction and initial conversion power, wherein the power conversion instruction is used for controlling a corresponding AC/DC converter to perform bidirectional power conversion of alternating current and direct current according to the value of the initial conversion power;
and when the initial conversion power is smaller than the first threshold value, controlling the AC/DC converter to convert the alternating current power in the corresponding branch circuit into the direct current power.
5. The power control method of claim 4, wherein the receiving power conversion instruction and the initial conversion power comprises:
and when the system establishes a steady state, if the receiving time of the power conversion instruction exceeds a second threshold value, retransmitting the first system parameter.
6. A power control device for use at a first energy management site, the device comprising:
the first acquisition module is used for acquiring first system parameters, wherein the first system parameters are the alternating current load power and the direct current load power of the branch circuit;
the data processing module is configured to calculate the first system parameter to obtain an initial conversion power of the AC/DC converter, and includes: the total power of the alternating current load power and the direct current load power is obtained through calculation, the average power of the alternating current load power and the direct current load power is calculated according to the total power, and the initial conversion power of the AC/DC converter is calculated according to the average power;
The first transmitting module is used for transmitting a power conversion instruction and the initial conversion power to the second energy management end, wherein the power conversion instruction is used for instructing the second energy management end to control the corresponding AC/DC converter to perform bidirectional power conversion of alternating current and direct current according to the value of the initial conversion power;
the instruction judging module is used for instructing the second energy management end to control the AC/DC converter to convert the direct current power of the corresponding branch into alternating current power when the initial conversion power is larger than a first threshold value, and instructing the second energy management end to control the AC/DC converter to convert the alternating current power of the corresponding branch into direct current power when the initial conversion power is smaller than the first threshold value.
7. A power control device for use at a second energy management site, the device comprising:
the second sending module is configured to collect and send a first system parameter to a first energy management end, where the first system parameter is an AC load power and a DC load power of a branch where the second energy management end is located, and the first energy management end is configured to perform summary calculation on the first system parameter to obtain an initial conversion power of the AC/DC converter, and includes: the total power of the alternating current load power and the direct current load power is obtained through calculation, the average power of the alternating current load power and the direct current load power is calculated according to the total power, and the initial conversion power of the AC/DC converter is calculated according to the average power;
The first receiving module is used for receiving a power conversion instruction and initial conversion power, and the power conversion instruction is used for controlling the corresponding AC/DC converter to perform bidirectional power conversion of alternating current and direct current according to the value of the initial conversion power;
the first control module is used for controlling the AC/DC converter to convert the direct current power in the corresponding branch circuit into the alternating current power when the initial conversion power is larger than a first threshold value, and controlling the AC/DC converter to convert the alternating current power in the corresponding branch circuit into the direct current power when the initial conversion power is smaller than the first threshold value.
8. An electronic device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor implements the steps of the method of any one of claims 1 to 3 or 4 to 5 when the computer program is executed.
9. A computer storage medium storing a computer program, characterized in that the computer program when executed by a processor implements the steps of the method of any one of claims 1 to 3 or 4 to 5.
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