CN113141057B - Monitoring integrated device for micro-grid and distributed control method - Google Patents
Monitoring integrated device for micro-grid and distributed control method Download PDFInfo
- Publication number
- CN113141057B CN113141057B CN202110426609.5A CN202110426609A CN113141057B CN 113141057 B CN113141057 B CN 113141057B CN 202110426609 A CN202110426609 A CN 202110426609A CN 113141057 B CN113141057 B CN 113141057B
- Authority
- CN
- China
- Prior art keywords
- control unit
- integrated device
- bus
- electric energy
- micro
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000012544 monitoring process Methods 0.000 title claims abstract description 11
- 238000006243 chemical reaction Methods 0.000 claims abstract description 61
- 238000011217 control strategy Methods 0.000 claims abstract description 24
- 238000010248 power generation Methods 0.000 claims description 87
- 238000004146 energy storage Methods 0.000 claims description 54
- 238000004891 communication Methods 0.000 claims description 53
- 230000003993 interaction Effects 0.000 claims description 10
- 230000005540 biological transmission Effects 0.000 abstract description 10
- 238000012545 processing Methods 0.000 abstract description 6
- 239000012141 concentrate Substances 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006798 recombination Effects 0.000 description 2
- 238000005215 recombination Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013486 operation strategy Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000011269 treatment regimen Methods 0.000 description 1
Classifications
-
- 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
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00001—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q10/00—Administration; Management
- G06Q10/06—Resources, workflows, human or project management; Enterprise or organisation planning; Enterprise or organisation modelling
- G06Q10/063—Operations research, analysis or management
- G06Q10/0631—Resource planning, allocation, distributing or scheduling for enterprises or organisations
- G06Q10/06312—Adjustment or analysis of established resource schedule, e.g. resource or task levelling, or dynamic rescheduling
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q50/00—Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism
- G06Q50/06—Electricity, gas or water supply
-
- 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
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00022—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using wireless data transmission
-
- 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
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
-
- 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
-
- 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
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/48—Controlling the sharing of the in-phase component
-
- 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
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/50—Controlling the sharing of the out-of-phase component
-
- 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
- H02J5/00—Circuit arrangements for transfer of electric power between ac networks and dc networks
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/12—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/14—Energy storage units
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission
Abstract
The invention relates to a monitoring integrated device and a distributed control method for a micro-grid, wherein the integrated device comprises a control module and an electric energy main circuit, and the control module comprises: the electric energy conversion control unit is used for controlling the electric energy main circuit to complete conversion between direct current and alternating current; the redundancy capacity control unit is used for sharing the control requirements of overflow of the electric energy conversion control unit and the coordination control unit according to the control task conditions of the electric energy conversion control unit and the coordination control unit; the coordination control unit is used for calculating the received data so as to obtain a cooperative control strategy; the cooperative control strategy comprises a strategy for scheduling the power of the micro-grid and a strategy for managing the harmonic waves in the micro-grid. The invention concentrates the data in the coordination control unit to be processed, and does not carry out long-distance transmission with the control instruction of the micro-grid central control system, namely, controls various indexes of the micro-grid in real time, in a short distance and in a multi-machine cooperation way, thereby avoiding errors in the processing or transmission process and improving the real-time performance and reliability of micro-grid control.
Description
Technical Field
The invention relates to the technical field of micro-grid distributed control, in particular to a monitoring integrated device for a micro-grid and a distributed control method.
Background
In recent years, micro-nets and operation control technologies thereof are widely studied, and different research institutions have made more research results on topological structures of the micro-nets, scheduling control of the micro-nets, protection of the micro-nets, design and control of converters in the micro-nets and the like. For improving the overall running performance of the micro-grid, two main current methods are adopted, one is to connect a micro-grid central controller with key equipment in the micro-grid, such as an inverter, in a wired communication mode and send corresponding instructions; the other is to set an autonomous operation strategy in the key equipment of the micro-grid, so that the micro-grid converter can operate autonomously in a certain working condition range. However, the manner in which wired communication is performed depends on the communication network, but the manner in which autonomous operation is possible is limited. In this case, if the control device of the micro-grid is provided, independent design and instruction are required, increasing the running cost of the micro-grid
Disclosure of Invention
The invention aims to solve the problems of communication and control reliability in the prior art when the micro-grid is controlled, and particularly when the micro-grid central control system is used for wired connection with equipment on each side in the micro-grid in the prior art, the operation of each equipment is too dependent on the micro-grid central control system, and when the equipment on each side operates autonomously within a certain working condition range, no good information interaction exists between the equipment. A monitoring integrated device and a distributed control method for a micro-grid are provided.
In order to achieve the above object, the embodiment of the present invention provides the following technical solutions:
a control integrative device for microgrid sets up respectively in power generation side, energy storage side, load side, integrative device includes the integrative device of power generation side, the integrative device of energy storage side, the integrative device of load side, and every integrative device includes control module, electric energy main circuit, control module includes:
the electric energy conversion control unit is used for controlling the electric energy main circuit to finish conversion between direct current and alternating current;
the redundancy capacity control unit is used for sharing the control requirements of overflow of the electric energy conversion control unit and the coordination control unit according to the control task conditions of the electric energy conversion control unit and the coordination control unit;
the coordination control unit is used for calculating the received data so as to obtain a cooperative control strategy; the cooperative control strategy comprises a strategy for scheduling the power of the micro-grid and a strategy for managing the harmonic waves in the micro-grid;
the electric energy main circuit is electrically connected with the micro-grid alternating current bus and is used for completing conversion between direct current and alternating current according to the control of the electric energy conversion control unit.
In the scheme, an integrated device is respectively arranged on the power generation side, the energy storage side and the load side, and the conditions of the bus are collected in the integrated device and are subjected to unified calculation and processing, so that a corresponding cooperative control strategy is obtained. After each device in the traditional micro-grid control technology autonomously acquires the bus, the bus is required to be sent to a micro-grid central control system for processing, then the micro-grid central control system calculates a control instruction for a certain device or a plurality of devices, if a certain device fails, the control instruction calculated by the micro-grid central control system is inevitably wrong, so that the operation of the device is wrong, the micro-grid works abnormally, and serious consequences are caused. The innovation of the invention is that the functions of generating and sending out instructions of the micro-grid central control system are dispersed into the following all-in-one devices, namely the instructions are completed in the all-in-one devices, so the control mode is distributed.
Therefore, the scheme concentrates the data to be processed by the coordination control unit, and the remote transmission of the control command with the micro-grid central control system is not performed any more, so that errors in the processing or transmission process are avoided, and the real-time performance and reliability of micro-grid control are improved.
Still further, the integrated devices further include a communication module including a wireless communication unit through which each integrated device communicates, so that the coordination control unit receives data transmitted by other integrated devices through the wireless communication unit.
In the above scheme, the wireless communication units are arranged in each integrated device, and the cooperative control strategies obtained by the coordination control units in the integrated devices at all sides are mutually transmitted through the wireless communication units, or other data, such as the voltage level of buses at all sides, are not needed to be interacted through the micro-grid central control system, so that the situation that all equipment receives wrong control instructions when some equipment fails is avoided. The proposal does not depend on a micro-grid central control system any more, firstly enhances the reliability of micro-grid control, and secondly improves the efficiency of micro-grid control.
Still further, the communication module further includes a wired communication unit, and each integrated device is connected with the micro-network communication bus through the wired communication unit, so that the coordination control unit interacts data with the micro-network central control system through the micro-network communication bus.
In the scheme, the traditional micro-grid central control system is not subjected to excessive changes, such as revocation or recombination, but the micro-grid central control system is used as a function of centralized data information storage, and after the data of all the side integrated devices are accessed into the micro-grid communication bus through the wired communication unit, the data are uploaded to the micro-grid central control system for storage and display, so that a user can conveniently call and check related data at the micro-grid central control system.
Further, the integrated device also comprises a power supply module, a protection circuit and interaction equipment; the power supply module is used for supplying power to the control module, the communication module and the interaction equipment; the protection circuit is used for protecting the integrated device when the power module provides overvoltage or overcurrent; the interaction device comprises a touch screen and a data access interface, and is used for interacting with a user.
A distributed control method for a microgrid, comprising the steps of:
the method comprises the steps that integrated devices are respectively arranged on a power generation side, an energy storage side and a load side, each integrated device comprises a control module, and each control module comprises an electric energy conversion control unit, a coordination control unit and a redundancy capacity control unit;
the electric energy conversion control unit controls the electric energy main circuit to complete conversion between direct current and alternating current;
the coordination control unit calculates the received data so as to obtain a cooperative control strategy; the cooperative control strategy comprises a strategy for scheduling the power of the micro-grid and a strategy for managing the harmonic waves in the micro-grid;
and the redundancy capacity control unit shares the control requirement of overflow of the electric energy conversion control unit and the coordination control unit according to the control task conditions of the electric energy conversion control unit and the coordination control unit.
As an implementation manner, the step of calculating, by the coordination control unit, the received data to obtain the cooperative control policy includes:
the coordination control unit in the integrated device at the energy storage side monitors bus voltage levels at the power generation side and the load side in real time, and when the electric energy generated by the power generation side fluctuates to ensure that the generated energy at the power generation side is not matched with the used energy at the load side, the coordination control unit of the integrated device at the energy storage side calculates the difference of the bus active power and obtains an active power scheduling strategy; the difference of the bus active power is the bus active power at the power generation side minus the bus active power at the load side;
the coordination control unit of the energy storage side integrated device sends the obtained active power scheduling strategy to the electric energy conversion control unit of the energy storage side integrated device, and if the difference of the bus active power is positive, the electric energy conversion control unit controls the electric energy main circuit to absorb the active power on the bus; if the difference of the bus active power supplies is negative, the electric energy conversion control unit controls the electric energy main circuit to send active power to the bus, so that the active power on the bus is balanced.
Further, if the difference of the bus active power calculated by the coordination control unit of the energy storage side integrated device exceeds the control power of the energy storage side, the coordination control unit sends an active power scheduling strategy to the coordination control unit of the power generation side integrated device or the coordination control unit of the load side integrated device;
the power conversion control unit at the power generation side and/or the power conversion control unit at the load side control the main circuit to send or absorb active power to the bus, so that the active power on the bus is balanced.
As another embodiment, the step of calculating, by the coordination control unit, the received data to obtain the cooperative control policy includes:
the method comprises the steps that a coordination control unit in an integrated device at an energy storage side monitors busbar voltage levels at a power generation side and a load side in real time, and when busbar reactive power at the power generation side and busbar reactive power at the load side are unbalanced, the coordination control unit of the integrated device at the energy storage side calculates the difference of busbar reactive power and obtains a reactive power dispatching strategy;
the coordination control unit of the energy storage side integrated device sends the obtained reactive power dispatching strategy to the coordination control unit of the power generation side integrated device, and the coordination control unit of the power generation side integrated device calculates a bus reactive power compensation value according to the received reactive power dispatching strategy, the self electric energy capacity and the power generation state;
and the coordination control unit of the integrated device at the power generation side sends the calculated bus reactive power compensation value to the electric energy conversion control unit thereof, and the electric energy conversion control unit controls the electric energy main circuit to generate reactive power to be compensated according to the bus reactive power compensation value, so that the reactive power on the bus is balanced.
It should be explained that the step of monitoring, in real time, the bus voltage levels of the power generation side and the load side by the coordination control unit in the integrated device of the energy storage side includes:
a coordination control unit in an integrated device at a power generation side acquires a bus voltage level at the power generation side in real time, and a coordination control unit in an integrated device at a load side acquires the bus voltage level at the load side in real time;
the coordination control unit in the integrated device at the energy storage side establishes communication connection with the integrated device at the power generation side and the integrated device at the load side respectively through the wireless communication unit, so that the coordination control unit of the integrated device at the energy storage side monitors bus voltage levels at the power generation side and the load side in real time, and bus active power or/and reactive power at the power generation side and the load side is obtained.
As another embodiment, the step of calculating, by the coordination control unit, the received data to obtain the cooperative control policy includes:
a coordination control unit in an integrated device at a power generation side acquires a bus voltage level at the power generation side in real time, and a coordination control unit in an integrated device at an energy storage side acquires the bus voltage level at the power generation side in real time, and a coordination control unit in an integrated device at a load side acquires the bus voltage level at the load side in real time;
when the coordination control unit monitors that the harmonic distortion rate on the bus exceeds a threshold value, the coordination control unit calculates a bus harmonic compensation value according to the harmonic distortion rate, the self electric energy capacity and the power generation state;
the coordination control unit sends the calculated bus harmonic compensation value to the electric energy conversion control unit at the side, and the electric energy conversion control unit controls the electric energy main circuit to send out harmonic compensation according to the bus harmonic compensation value, so that the harmonic distortion rate on the bus is within a threshold value.
Compared with the prior art, the invention has the beneficial effects that:
(1) The invention concentrates the data in the coordination control unit to be processed, and does not carry out remote transmission with the control instruction of the micro-grid central control system, thereby avoiding errors in the processing or transmission process and improving the real-time performance and reliability of micro-grid control.
(2) According to the invention, the wireless communication units are arranged in each integrated device, the cooperative control strategies obtained by the coordination control units in all the integrated devices are mutually transmitted through the wireless communication units, or other data such as the voltage level of buses at all sides are not needed to be interacted through a micro-network central control system, so that the situation that all equipment receives wrong control instructions when certain equipment fails is avoided. The proposal does not depend on a micro-grid central control system any more, firstly enhances the reliability of micro-grid control, and secondly improves the efficiency of micro-grid control.
(3) The invention does not make excessive changes such as withdrawal or recombination to the traditional micro-grid central control system, but takes the micro-grid central control system as a function of centralized storage of data information, and the data of all the integrated devices are uploaded to the micro-grid central control system for storage and display after being accessed to a micro-grid communication bus through a wired communication unit, so that a user can conveniently call and check related data at the micro-grid central control system.
(4) The coordination control unit in the integrated device calculates the harmonic wave of the power meter of the micro-grid, so that a reasonable scheduling strategy and a reasonable treatment strategy are obtained, and the real-time monitoring of the working conditions of the buses at each side in the micro-grid is realized.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a block diagram of a control module and a power master circuit module of an integrated device on each side of a microgrid of the present invention;
FIG. 2 is a block diagram of a communication module of an integrated device on each side of the micro-grid according to the present invention;
FIG. 3 is a block diagram of an integrated device of the present invention;
fig. 4 is a schematic flow chart of the cooperative control strategy according to the present embodiment.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures. Also, in the description of the present invention, the terms "first," "second," and the like are used merely to distinguish one from another, and are not to be construed as indicating or implying a relative importance or implying any actual such relationship or order between such entities or operations.
Example 1:
the invention provides an integrated device which is realized by the following technical scheme, and is used for monitoring a micro-grid, wherein the micro-grid comprises a power generation side, an energy storage side, a load side, the power generation side can be provided with a photovoltaic power generation side, a wind power generation side and the like, electric energy generated by the power generation side is transmitted to the load side for electricity utilization, and redundant or partial electric energy is stored in the energy storage side. As shown in fig. 1, the present embodiment is provided with an integrated device on the power generation side, the energy storage side, and the load side, respectively, that is, the integrated device may be divided into an integrated device on the power generation side, an integrated device on the energy storage side, and an integrated device on the load side.
Referring to fig. 3, each integrated device includes a control module, an electric energy main circuit, and a communication module, where the control module specifically includes an electric energy conversion control unit, a redundancy capability control unit, and a coordination control unit, where:
and the electric energy conversion control unit is used for controlling the electric energy main circuit to complete conversion between direct current and alternating current.
The coordination control unit is used for calculating the received data so as to obtain a cooperative control strategy; the cooperative control strategy comprises a strategy for scheduling the power of the micro-grid and a strategy for managing the harmonic waves in the micro-grid. For example, after the cooperative control strategy is calculated, the cooperative control strategy is sent to the electric energy conversion control unit, and the electric energy conversion control unit controls the electric energy main circuit to complete conversion between direct current and alternating current according to the cooperative control strategy, so that electric energy is absorbed or generated to the micro-grid bus, and the micro-grid bus operates in balance.
And the redundancy capacity control unit is used for sharing the control requirements of the electric energy transformation control unit and the coordination control unit according to the control task conditions of the electric energy transformation control unit and the coordination control unit. For example, when the cooperative control strategy calculated by the coordination control unit is complex in process, large in data quantity and the like, the redundant capacity control unit helps the coordination control unit to calculate together, so that the calculation processing pressure of the coordination control unit is reduced, and the working efficiency of the integrated device is improved. Or when the electric energy conversion control unit controls the electric energy main circuit to perform the electric energy conversion task, the control quantity is overlarge, and the like, part of control functions can be shared into the redundancy capacity control unit so as to share the control pressure of the electric energy conversion control unit, and the working efficiency of the integrated device is also improved.
The electric energy main circuit is electrically connected with a micro-grid alternating current bus (hereinafter simply referred to as a bus), and the conversion between direct current and alternating current is completed according to the control of the electric energy conversion control unit, so that electric energy is absorbed or generated to the micro-grid bus, and the micro-grid bus operates in balance.
The communication module includes a wireless communication unit and a wired communication unit, as shown in fig. 2, where the integrated device communicates with other integrated devices through the wireless communication unit, for example, when the integrated device on the power generation side communicates with the integrated device on the energy storage side, a communication connection is established through the respective wireless communication units. It is easy to understand that the integrated devices on the power generation side, the energy storage side and the load side all perform communication data transmission through the wireless communication unit.
In the traditional micro-grid control, when the micro-grid central control system is connected in a wired mode at the micro-grid, and buses at the power generation side, the energy storage side and the load side are regulated and controlled, data are obtained and processed through the micro-grid central control system in a centralized mode, and control is performed, but if one side fails, a control instruction finally issued by the micro-grid central control system is wrong, and then the control of the whole micro-grid is wrong. Therefore, in conventional microgrid control, devices on each side are too much dependent on the microgrid central control system. In the invention, the integrated device can be connected into the micro-network communication bus through the wired communication unit so as to be connected and communicated with the micro-network central control system, and is used for sending data of each side to the micro-network central control system for storage or display and the like, and the micro-network central control system does not send control instructions to equipment of each side.
With continued reference to fig. 3, the integrated device further includes a power module, a protection circuit, and an interaction device, where the power module is configured to supply power to the control module, the communication module, and the interaction device; the protection circuit is used for protecting the integrated device when the power module provides overvoltage or overcurrent; the interaction device comprises a touch screen and a data access interface, and is used for interacting with a user.
The invention further provides a distributed control method for the micro-grid based on the integrated device, referring to fig. 1, a coordination control unit in the integrated device at the power generation side acquires the bus voltage level at the power generation side in real time, a coordination control unit in the integrated device at the energy storage side acquires the bus voltage level at the energy storage side in real time, and a coordination control unit in the integrated device at the load side acquires the bus voltage level at the load side in real time. Referring to fig. 2, the coordination control units on each side communicate with the coordination control units on other sides through the wireless communication unit to realize data transmission and sharing.
As an example, the present embodiment provides the following four cooperative control strategies, as shown in fig. 4, but the present invention is not limited to the following four:
1. when the influence of the external environment is received, the electric energy generated by the power generation side can generate fluctuation, so that the generated energy of the power generation side is not matched with the electric energy of the load side. Because the power generation side and the load side can share data with the integrated device of the energy storage side in real time, the coordination control unit of the energy storage side can monitor the condition that the electric quantity of the power generation side and the electric quantity of the load side are not matched.
And the coordination control unit of the energy storage side integrated device calculates the difference of the bus active power according to the data sent by the power generation side and the load side, and obtains an active power scheduling strategy.
When calculating the bus active power difference, the bus active power on the power generation side is subtracted from the bus active power on the load side, or the bus active power on the power generation side is subtracted from the bus active power on the load side.
The coordination control unit of the energy storage side integrated device sends the obtained active power scheduling strategy to each integrated device, and the coordination control of the power generation side, the energy storage side and the load side is performed.
If the bus active power difference is a positive number, it is indicated that the amount of electricity output from the power generation side to the load side is greater than the amount of electricity used by the load side, and then the electric energy conversion control unit controls the electric energy main circuit to absorb the active power on the bus; if the difference of the active power of the bus is negative, which means that the electric quantity output from the power generation side to the load side is smaller than the electric quantity used by the load side, the electric energy conversion control unit controls the electric energy main circuit to send the active power to the bus at the moment, so that the active power on the bus reaches balance.
2. On the basis of the above-mentioned condition 1, if the difference of the active power of the bus calculated by the coordination control unit of the energy storage side integrated device exceeds the control power of the energy storage side, for example, after calculation, the active power of Δp needs to be sent to the bus to make the micro-grid bus reach the active power balance, but when the electric energy main circuit of the energy storage side integrated device cannot fully compensate for the difference of the active power, the coordination control unit sends the active power scheduling policy to the coordination control unit of the power generation side integrated device or the coordination control unit of the load side integrated device, so that the electric energy main circuit of the power generation side and/or the load side sends active power to the bus and/or cuts off part of load, so that the active power on the bus is balanced.
Or after calculation, the Δp active power on the bus needs to be absorbed to enable the micro-grid bus to achieve active power balance, but when the electric energy main circuit of the energy storage side integrated device can only absorb part of the active power difference, the coordination control unit sends an active power scheduling strategy to the coordination control unit of the power generation side integrated device or the coordination control unit of the load side integrated device, so that the power generation side cut-out part power generation unit and/or the load side cut-in part can schedule the load to absorb the active power on the bus, and the active power on the bus is balanced.
3. When the reactive power of the generating side and the bus and the reactive power of the load side are unbalanced, the coordination control unit of the integrated device at the energy storage side calculates the difference of the reactive power of the bus and obtains a reactive power dispatching strategy. The way of calculating the difference may be the same as the way of calculating the active power difference, but the method of calculating the active power or the reactive power according to the bus voltage level belongs to the prior art, so the invention will not be described in detail.
The coordination control unit of the energy storage side integrated device sends the obtained reactive power scheduling strategy to the coordination control unit of the power generation side integrated device, and the data transmission mode is the transmission through the wireless communication unit. And the coordination control unit of the integrated device at the power generation side calculates a bus reactive power compensation value according to the received reactive power scheduling strategy, the self power capacity and the power generation state. The self power capacity and the power generation state are the power capacity and the power generation state of the power main circuit at the self side.
And the coordination control unit of the power generation side integrated device sends the calculated bus reactive power compensation value to the electric energy conversion control unit of the power generation side integrated device, and the electric energy conversion control unit controls the electric energy main circuit to generate reactive power to be compensated according to the bus reactive power compensation value, so that the reactive power on the bus is balanced.
4. When the coordination control unit in the integrated device at the power generation side, the energy storage side or the load side monitors that the harmonic distortion rate on the bus exceeds a threshold value, for example, the standard frequency in the micro-grid is 50Hz, the waveform is a sine wave, the waveform is called a fundamental wave, the frequency is more than 50Hz, the waveform is called a harmonic wave, and therefore the threshold value of the harmonic distortion rate can be set to be 50Hz. However, when some loads work normally, harmonics are generated, but if the distortion rate of the harmonics exceeds the distortion rate of the micro-grid, or if the distortion rate exceeds the threshold value of the harmonics in the micro-grid, the whole micro-grid is disturbed.
Therefore, the coordination control units at each side of the scheme calculate the bus harmonic compensation value according to the harmonic distortion rate, the self-power capacity and the power generation state. The coordination control unit sends the calculated bus harmonic compensation value to the local side electric energy conversion control unit, and the electric energy conversion control unit controls the electric energy main circuit to send harmonic compensation according to the bus harmonic compensation, so that the harmonic distortion rate on the bus is within a threshold value.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. A control integrative device for microgrid sets up in power generation side, energy storage side, load side, its characterized in that respectively: the integrated device comprises an integrated device at the power generation side, an integrated device at the energy storage side and an integrated device at the load side, each integrated device comprises a control module and an electric energy main circuit, and the control module comprises:
the electric energy conversion control unit is used for controlling the electric energy main circuit to finish conversion between direct current and alternating current;
the redundancy capacity control unit is used for sharing the control requirements of overflow of the electric energy conversion control unit and the coordination control unit according to the control task conditions of the electric energy conversion control unit and the coordination control unit;
the coordination control unit is used for calculating the received data so as to obtain a cooperative control strategy; the cooperative control strategy comprises a strategy for scheduling the power of the micro-grid and a strategy for managing the harmonic waves in the micro-grid;
the electric energy main circuit is electrically connected with the micro-grid alternating current bus and is used for completing conversion between direct current and alternating current according to the control of the electric energy conversion control unit;
the integrated device also comprises a communication module, wherein the communication module comprises a wireless communication unit, and each integrated device is communicated through the wireless communication unit, so that the coordination control unit receives data sent by other integrated devices through the wireless communication unit;
the communication module further comprises a wired communication unit, each integrated device is connected with the micro-network communication bus through the wired communication unit so as to be connected and communicated with the micro-network central control system, the communication module is used for sending data of each side to the micro-network central control system for storage or display, and the micro-network central control system does not give control instructions to equipment of each side.
2. A monitoring integrated device for a micro-grid according to claim 1, wherein: the integrated device also comprises a power supply module, a protection circuit and interaction equipment; the power supply module is used for supplying power to the control module, the communication module and the interaction equipment; the protection circuit is used for protecting the integrated device when the power module provides overvoltage or overcurrent; the interaction device comprises a touch screen and a data access interface, and is used for interacting with a user.
3. A distributed control method for a microgrid, characterized by: use of a monitoring integrated device for a microgrid according to any one of claims 1-2, comprising the steps of:
the method comprises the steps that integrated devices are respectively arranged on a power generation side, an energy storage side and a load side, each integrated device comprises a control module, and each control module comprises an electric energy conversion control unit, a coordination control unit and a redundancy capacity control unit;
the electric energy conversion control unit controls the electric energy main circuit to complete conversion between direct current and alternating current;
the coordination control unit calculates the received data so as to obtain a cooperative control strategy; the cooperative control strategy comprises a strategy for scheduling the power of the micro-grid and a strategy for managing the harmonic waves in the micro-grid;
the coordination control unit calculates the received data so as to obtain a cooperative control strategy, which comprises the following steps:
the coordination control unit in the integrated device at the energy storage side monitors bus voltage levels at the power generation side and the load side in real time, and when the electric energy generated by the power generation side fluctuates to ensure that the generated energy at the power generation side is not matched with the used energy at the load side, the coordination control unit of the integrated device at the energy storage side calculates the difference of the bus active power and obtains an active power scheduling strategy; the difference of the bus active power is the bus active power at the power generation side minus the bus active power at the load side;
the coordination control unit of the energy storage side integrated device sends the obtained active power scheduling strategy to the electric energy conversion control unit of the energy storage side integrated device, and if the difference of the bus active power is positive, the electric energy conversion control unit controls the electric energy main circuit to absorb the active power on the bus; if the difference of the bus active power supplies is negative, the electric energy conversion control unit controls the electric energy main circuit to send active power to the bus, so that the active power on the bus is balanced;
the redundancy capacity control unit shares the control requirements of overflow of the electric energy conversion control unit and the coordination control unit according to the control task conditions of the electric energy conversion control unit and the coordination control unit;
each integrated device is connected with the micro-network communication bus through the wired communication unit so as to be connected and communicated with the micro-network central control system, and is used for sending data of each side to the micro-network central control system for storage or display, and the micro-network central control system does not send control instructions to equipment of each side.
4. A distributed control method for a microgrid according to claim 3, characterized in that:
if the difference of the bus active power calculated by the coordination control unit of the integrated device at the energy storage side exceeds the control power at the energy storage side, the coordination control unit sends an active power scheduling strategy to the coordination control unit of the integrated device at the power generation side or the coordination control unit of the integrated device at the load side;
the power conversion control unit at the power generation side and/or the power conversion control unit at the load side control the main circuit to send or absorb active power to the bus, so that the active power on the bus is balanced.
5. A distributed control method for a microgrid according to claim 3, characterized in that: the coordination control unit calculates the received data so as to obtain a cooperative control strategy, which comprises the following steps:
the method comprises the steps that a coordination control unit in an integrated device at an energy storage side monitors busbar voltage levels at a power generation side and a load side in real time, and when busbar reactive power at the power generation side and busbar reactive power at the load side are unbalanced, the coordination control unit of the integrated device at the energy storage side calculates the difference of busbar reactive power and obtains a reactive power dispatching strategy;
the coordination control unit of the energy storage side integrated device sends the obtained reactive power dispatching strategy to the coordination control unit of the power generation side integrated device, and the coordination control unit of the power generation side integrated device calculates a bus reactive power compensation value according to the received reactive power dispatching strategy, the self electric energy capacity and the power generation state;
and the coordination control unit of the integrated device at the power generation side sends the calculated bus reactive power compensation value to the electric energy conversion control unit thereof, and the electric energy conversion control unit controls the electric energy main circuit to generate reactive power to be compensated according to the bus reactive power compensation value, so that the reactive power on the bus is balanced.
6. A distributed control method for a microgrid according to claim 3 or 5, characterized in that: the step of the coordinated control unit in the integrated device of the energy storage side for monitoring the bus voltage level of the power generation side and the load side in real time comprises the following steps:
a coordination control unit in an integrated device at a power generation side acquires a bus voltage level at the power generation side in real time, and a coordination control unit in an integrated device at a load side acquires the bus voltage level at the load side in real time;
the coordination control unit in the integrated device at the energy storage side establishes communication connection with the integrated device at the power generation side and the integrated device at the load side respectively through the wireless communication unit, so that the coordination control unit of the integrated device at the energy storage side monitors bus voltage levels at the power generation side and the load side in real time, and bus active power or/and reactive power at the power generation side and the load side is obtained.
7. A distributed control method for a microgrid according to claim 3, characterized in that: the coordination control unit calculates the received data so as to obtain a cooperative control strategy, which comprises the following steps:
a coordination control unit in an integrated device at a power generation side acquires a bus voltage level at the power generation side in real time, and a coordination control unit in an integrated device at an energy storage side acquires the bus voltage level at the power generation side in real time, and a coordination control unit in an integrated device at a load side acquires the bus voltage level at the load side in real time;
when the coordination control unit monitors that the harmonic distortion rate on the bus exceeds a threshold value, the coordination control unit calculates a bus harmonic compensation value according to the harmonic distortion rate, the self electric energy capacity and the power generation state;
the coordination control unit sends the calculated bus harmonic compensation value to the electric energy conversion control unit at the side, and the electric energy conversion control unit controls the electric energy main circuit to send out harmonic compensation according to the bus harmonic compensation value, so that the harmonic distortion rate on the bus is within a threshold value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110426609.5A CN113141057B (en) | 2021-04-20 | 2021-04-20 | Monitoring integrated device for micro-grid and distributed control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110426609.5A CN113141057B (en) | 2021-04-20 | 2021-04-20 | Monitoring integrated device for micro-grid and distributed control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113141057A CN113141057A (en) | 2021-07-20 |
| CN113141057B true CN113141057B (en) | 2024-01-26 |
Family
ID=76813007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110426609.5A Active CN113141057B (en) | 2021-04-20 | 2021-04-20 | Monitoring integrated device for micro-grid and distributed control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113141057B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105514966A (en) * | 2016-01-21 | 2016-04-20 | 上海电力学院 | Energy storage optimization and coordination control method for direct-current micro grid group |
| CN105743126A (en) * | 2016-04-14 | 2016-07-06 | 华南理工大学 | Microgrid energy management system capable of realizing load management |
| CN105762934A (en) * | 2016-03-30 | 2016-07-13 | 南京邮电大学 | Distributed coordination hybrid control method based on energy interconnected electric power system |
| CN105870911A (en) * | 2016-05-17 | 2016-08-17 | 国网浙江省电力公司电力科学研究院 | Multi-source coordination control method for direct-current microgrid |
| CN108462198A (en) * | 2018-01-24 | 2018-08-28 | 三峡大学 | A kind of microgrid Optimization Scheduling of providing multiple forms of energy to complement each other based on multi-agent technology |
| CN110474354A (en) * | 2019-08-13 | 2019-11-19 | 南瑞集团有限公司 | Micro-capacitance sensor isolated operation mode control method for coordinating containing lithium battery and super capacitor |
| CN110518641A (en) * | 2019-09-23 | 2019-11-29 | 西南交通大学 | A kind of exchange micro-capacitance sensor realizes the distributed layer control method for coordinating of power distribution |
| CN110718933A (en) * | 2019-03-21 | 2020-01-21 | 沈阳工程学院 | Multilevel coordinated wind storage isolated network system power balance control strategy |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101931238A (en) * | 2010-04-29 | 2010-12-29 | 浙江省电力试验研究院 | Master-slave strategy-based microgrid system coordination control method |
| CN104242337B (en) * | 2014-08-14 | 2017-05-31 | 广东易事特电源股份有限公司 | The real time coordination control method of photovoltaic microgrid system |
| CN204424898U (en) * | 2014-09-02 | 2015-06-24 | 南方电网科学研究院有限责任公司 | A kind of novel micro-grid system control device |
| CN104393608A (en) * | 2014-12-08 | 2015-03-04 | 国家电网公司 | Dynamic stability control method, device and system for micro grid |
| CN106532730B (en) * | 2016-12-28 | 2019-01-29 | 江苏金风科技有限公司 | Micro-capacitance sensor dynamic stability control system and method |
| CN106887840A (en) * | 2017-03-23 | 2017-06-23 | 西安电子科技大学 | A kind of microgrid control system |
| CN108365627B (en) * | 2018-03-09 | 2021-11-23 | 沈阳工程学院 | Wind storage isolated grid power supply system coordination control method based on flexible coordination factors |
-
2021
- 2021-04-20 CN CN202110426609.5A patent/CN113141057B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105514966A (en) * | 2016-01-21 | 2016-04-20 | 上海电力学院 | Energy storage optimization and coordination control method for direct-current micro grid group |
| CN105762934A (en) * | 2016-03-30 | 2016-07-13 | 南京邮电大学 | Distributed coordination hybrid control method based on energy interconnected electric power system |
| CN105743126A (en) * | 2016-04-14 | 2016-07-06 | 华南理工大学 | Microgrid energy management system capable of realizing load management |
| CN105870911A (en) * | 2016-05-17 | 2016-08-17 | 国网浙江省电力公司电力科学研究院 | Multi-source coordination control method for direct-current microgrid |
| CN108462198A (en) * | 2018-01-24 | 2018-08-28 | 三峡大学 | A kind of microgrid Optimization Scheduling of providing multiple forms of energy to complement each other based on multi-agent technology |
| CN110718933A (en) * | 2019-03-21 | 2020-01-21 | 沈阳工程学院 | Multilevel coordinated wind storage isolated network system power balance control strategy |
| CN110474354A (en) * | 2019-08-13 | 2019-11-19 | 南瑞集团有限公司 | Micro-capacitance sensor isolated operation mode control method for coordinating containing lithium battery and super capacitor |
| CN110518641A (en) * | 2019-09-23 | 2019-11-29 | 西南交通大学 | A kind of exchange micro-capacitance sensor realizes the distributed layer control method for coordinating of power distribution |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113141057A (en) | 2021-07-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Gupta et al. | Hybrid AC–DC microgrid: Systematic evaluation of control strategies | |
| CN103427430B (en) | A kind of energy management method of mixed energy storage system in microgrid | |
| CN105226632A (en) | A kind of multi-mode of DC micro power grid system switches control method for coordinating | |
| CN112117767B (en) | Power supply and distribution system based on multi-station fusion | |
| CN103595138A (en) | Smart micro-grid system | |
| CN102916481A (en) | Direct-current microgrid system and energy management method thereof | |
| Jia et al. | Architecture design for new AC-DC hybrid micro-grid | |
| AU2016339424A1 (en) | Energy gateway, household appliance, direct-current micro-grid system and energy management method therefor | |
| CN110649621A (en) | Low-voltage energy router with load priority control function and control method thereof | |
| CN110460052A (en) | A kind of photovoltaic inversion control method that can improve distribution network electric energy quality | |
| Gao et al. | Distributed multi‐agent control for combined AC/DC grids with wind power plant clusters | |
| CN112421679B (en) | Electrical wiring structure based on hybrid micro-grid and energy flow method thereof | |
| CN209844563U (en) | Electric energy quality dynamic regulator for micro-grid | |
| CN113141057B (en) | Monitoring integrated device for micro-grid and distributed control method | |
| KR20200079606A (en) | Control system of DC Uninterruptible Power Supply for load distribution | |
| CN112994019B (en) | Flexible interconnected power distribution network system | |
| Shehadeh et al. | Enhancement of a microgrid operation in blackouts using central control scheme and network reconfiguration: A case study | |
| CN113437790A (en) | Photovoltaic energy storage power generation equipment and control method thereof | |
| CN110994605A (en) | Alternating current-direct current microgrid system | |
| Abuhilaleh et al. | Power management and control strategy for hybrid AC/DC microgrids in autonomous operation mode | |
| CN204465138U (en) | A kind of AC/DC integrated power-supply system | |
| CN216451179U (en) | Photovoltaic energy storage power generation equipment | |
| CN218498875U (en) | Flexible wisdom coordinated control system of little electric wire netting | |
| CN211018275U (en) | Direct current micro-grid system | |
| CN113794247B (en) | Automatic demand-responsive regulated power storage control |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |