CN114024368A - Hybrid micro-grid application platform and control method thereof - Google Patents

Hybrid micro-grid application platform and control method thereof Download PDF

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Publication number
CN114024368A
CN114024368A CN202111334302.9A CN202111334302A CN114024368A CN 114024368 A CN114024368 A CN 114024368A CN 202111334302 A CN202111334302 A CN 202111334302A CN 114024368 A CN114024368 A CN 114024368A
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China
Prior art keywords
module
microgrid
current
hybrid
voltage
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CN202111334302.9A
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Chinese (zh)
Inventor
胡志刚
陈伟卓
巫邵波
蔡红健
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Nantong Textile Vocational Technology College
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Nantong Textile Vocational Technology College
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Priority to CN202111334302.9A priority Critical patent/CN114024368A/en
Publication of CN114024368A publication Critical patent/CN114024368A/en
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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
    • 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]
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00—Details of emergency protective circuit arrangements
    • H02H1/0061—Details of emergency protective circuit arrangements concerning transmission of signals
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00—Details of emergency protective circuit arrangements
    • H02H1/0092—Details of emergency protective circuit arrangements concerning the data processing means, e.g. expert systems, neural networks
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
    • H02H7/28—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured for meshed systems
    • 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
    • H02J13/00036—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers
    • H02J13/0004—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers involved in a protection system
    • 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
    • Y04S10/20—Systems supporting electrical power generation, transmission or distribution using protection elements, arrangements or systems

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Artificial Intelligence (AREA)
  • Evolutionary Computation (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Inverter Devices (AREA)

Abstract

The invention discloses a hybrid micro-grid application platform and a control method thereof, and the technical scheme is as follows: the intelligent control system comprises an access module, a conversion module, an intelligent identification module, a detection module, a protection module, a voltage transformation output module, an alarm module, a human-computer interaction module, a state display module, an intelligent control module and five control steps. The hybrid microgrid application platform and the control method thereof provided by the invention have the advantages that the access of the hybrid microgrid is simple and trouble-saving, the requirement on professional literacy of workers can be effectively reduced, the labor cost is saved, the direct current transmission power is utilized, the manufacturing cost of a circuit can be reduced, the active power loss of the circuit is small, the direct current transmission power is not limited by the transmission distance, the stability of the system is good, the short-circuit current of the system can be limited, the regulation speed is high, the operation is reliable, the corresponding microgrid with the input voltage or current larger than a set value can be cut off, the microgrid with the fault removed can be automatically connected, and the stable reliability of the system is improved.

Description

Hybrid micro-grid application platform and control method thereof
Technical Field
The invention relates to the technical field of micro-grids, in particular to a hybrid micro-grid application platform and a control method thereof.
Background
The micro-grid is also translated into a micro-grid, and refers to a small power generation and distribution system which is composed of a distributed power supply, an energy storage device, an energy conversion device, a load, a monitoring and protection device and the like. The micro-grid aims to realize flexible and efficient application of distributed power supplies and solve the problem of grid connection of the distributed power supplies with large quantity and various forms. The development and extension of the micro-grid can fully promote the large-scale access of distributed power sources and renewable energy sources, realize the high-reliability supply of various energy source types of loads, and is an effective mode for realizing an active power distribution network, so that the traditional power grid is transited to a smart power grid.
The current hybrid micro-grid application platform has the following defects: when the hybrid micro-grid is connected into the hybrid micro-grid, the type of the hybrid micro-grid needs to be considered as a direct-current micro-grid or an alternating-current micro-grid, so that the hybrid micro-grid is relatively complicated to connect, the requirement on professional literacy of workers is relatively high, the labor cost is increased, alternating-current transmission is generally adopted, the manufacturing cost of a circuit is relatively high, the active loss of the circuit is large, the alternating-current transmission is also limited by the transmission distance, the stability of the system is poor, the short-circuit current of the system is difficult to limit, the regulation speed is slow, the operation reliability is poor, the corresponding micro-grid can be automatically cut off only when the voltage or the current input into the connected micro-grid is greater than a set value, the micro-grid with the fault removal is difficult to automatically connect, the intelligent degree is low, and a large amount of labor cost needs to be invested.
Therefore, a hybrid micro-grid application platform and a control method thereof are provided.
Disclosure of Invention
The invention aims to provide a hybrid microgrid application platform and a control method thereof, which can automatically identify whether an accessed hybrid microgrid is a direct current microgrid or an alternating current microgrid, can be accessed without considering the type of the hybrid microgrid, can be accessed to a hybrid microgrid simply and easily, can effectively reduce the requirement on professional literacy of workers, thereby saving labor cost, can intelligently convert alternating current input by the alternating current microgrid into direct current, can reduce the manufacturing cost of a circuit by utilizing direct current to transmit power, has small active loss of the circuit, is not limited by the transmission distance of the direct current, has good system stability, can limit the short-circuit current of the system, has high regulation speed and reliable operation, and can send out an alarm sound to inform the workers of timely reaching the site to give an alarm when the voltage or the current is larger than a set value when the voltage or the current input by the accessed microgrid is larger than the set value The fault of (2) just overhauls, can cut off the microgrid that the input voltage or electric current are greater than the correspondence of setting value simultaneously to the microgrid automatic switch-on that removes the fault can automatic operation, and intelligent degree is higher, can effectively reduce human cost's input, increases the reliable and stable nature of system, with the problem of mentioning in solving the background art.
The technical purpose of the invention is realized by the following technical scheme:
a mixed micro-grid application platform comprises an access module, a conversion module, an intelligent identification module, a detection module, a protection module, a voltage transformation output module, an alarm module, a human-computer interaction module, a state display module and an intelligent control module;
the access module is used for accessing a hybrid microgrid, and the hybrid microgrid comprises a direct-current microgrid and an alternating-current microgrid;
the conversion module is used for converting alternating current into direct current;
the intelligent identification module is used for automatically identifying whether the accessed hybrid micro-grid is the direct current micro-grid or the alternating current micro-grid and uploading a detection result to the intelligent control module;
the detection module is used for detecting the voltage and the current output by the accessed hybrid micro-grid and uploading the detected voltage and current to the intelligent control module in real time;
the protection module is used for switching off or switching on the hybrid micro-grid;
the voltage transformation output module is used for transforming the voltage output by the conversion module or the voltage output by the direct current micro-grid into a voltage with a stable value and merging the voltage with the power grid;
the alarm module is used for giving an alarm when the voltage or the current detected by the detection module is greater than a set value so as to inform a worker to timely arrive at a site to overhaul the fault when the voltage or the current is greater than the set value;
the human-computer interaction module is used for providing a human-computer interaction interface, and the human-computer interaction interface is used for enabling a worker to communicate with the hybrid micro-grid application platform and operate the hybrid micro-grid application platform;
the state display module is used for displaying the state of the hybrid micro-grid application platform;
the intelligent control module is used for controlling the conversion module, the intelligent identification module, the detection module, the protection module, the voltage transformation output module, the alarm module, the human-computer interaction module and the state display module to automatically work.
By adopting the technical scheme, the hybrid micro-grid application platform mainly comprises an access module, a conversion module, an intelligent identification module, a detection module, a protection module, a voltage transformation output module, an alarm module, a man-machine interaction module, a state display module and an intelligent control module, wherein the intelligent identification module can automatically identify whether the accessed hybrid micro-grid is a direct current micro-grid or an alternating current micro-grid and upload a detection result to the intelligent control module; the conversion module who sets up is used for converting the alternating current into the direct current, adopts direct current transmission power to possess following advantage: when the same power is transmitted, the cost of the line is low; the active loss of the line is small; the direct current transmission is not limited by the transmission distance, the system stability is good, the short-circuit current of the system can be limited, the regulation speed is high, the operation is reliable, and the like; when the voltage or the current detected by the detection module is greater than the set value, the alarm module can send an alarm sound to inform workers of timely arriving at the site to overhaul faults when the voltage or the current is greater than the set value, in addition, the intelligent detection system can automatically operate, has higher intelligent degree, can effectively reduce the investment of labor cost, and increases the stability and reliability of the system.
The hybrid microgrid application platform comprises an intelligent identification module, a detection module, a protection module, an alarm module, a human-computer interaction module and a state display module, wherein the intelligent identification module, the detection module, the protection module, the alarm module, the human-computer interaction module and the state display module are all electrically connected with an intelligent control module.
By adopting the technical scheme, the intelligent control module can be used for controlling the automatic operation of the intelligent identification module, the detection module, the protection module, the alarm module, the human-computer interaction module and the state display module, and the intelligent degree of the hybrid micro-grid application platform is improved.
In the above hybrid microgrid application platform, when the recognized hybrid microgrid is the dc microgrid, the intelligent control module controls the conversion module not to operate, and when the recognized hybrid microgrid is the ac microgrid, the intelligent control module controls the conversion module to convert ac power output by the ac microgrid into dc power.
By adopting the technical scheme, the function of converting alternating current into direct current automatically by the hybrid micro-grid application platform can be realized.
When the voltage or the current detected by the detection module is greater than a set value, the intelligent control module controls the alarm module to give an alarm, and simultaneously controls the human-computer interaction module to display detailed alarm information and controls the state display module to display an abnormal working state.
By adopting the technical scheme, the staff of being convenient for in time have corresponding overhauls the mixed type microgrid of inserting, can effectively improve maintenance efficiency, effectively reduce staff's intensity of labour simultaneously.
In the above hybrid microgrid application platform, when the voltage or the current detected by the detection module is greater than a set value, the intelligent control module controls the protection module to switch off the corresponding hybrid microgrid, and when the voltage or the current detected by the detection module conforms to the set value, the intelligent control module controls the protection module to switch on the corresponding hybrid microgrid.
By adopting the technical scheme, the corresponding hybrid micro-grid can be cut off in time when the voltage or the current input to the accessed hybrid micro-grid is greater than a set value, so that the hybrid micro-grid application platform is ensured to operate stably and safely, and the major loss is avoided.
The hybrid microgrid application platform comprises an access module and a photoelectric sensor, wherein the access module comprises a wiring terminal and the photoelectric sensor is used for detecting whether the wiring terminal is connected to the hybrid microgrid.
By adopting the technical scheme, the wiring terminal is used for accessing the microgrid, and the photoelectric sensor is used for detecting whether the corresponding wiring terminal accesses the microgrid or not so as to realize the purpose of automatically detecting whether the microgrid is accessed or not.
The hybrid microgrid application platform comprises a conversion module, a protection module and a control module, wherein the conversion module comprises an inverter, the protection module comprises a first relay and a second relay, the first relay is respectively connected with the second relay and the inverter in parallel, and the second relay is connected with the inverter in series.
By adopting the technical scheme, when the intelligent identification module automatically identifies the accessed hybrid micro-grid as the direct-current micro-grid, the first relay is closed, and the second relay is opened; when the intelligent identification module automatically identifies the accessed hybrid micro-grid as the alternating current micro-grid, the first relay is disconnected, the second relay is closed, and the inverter is switched on at the moment to convert the alternating current into the direct current.
The hybrid micro-grid application platform comprises a magnetic field sensor, a detection module, a voltage sensor, a current sensor, a transformation output module, an alarm module, a human-computer interaction module and an intelligent control module, wherein the detection module comprises a voltage sensor and a current sensor, the transformation output module comprises a direct current transformer, the alarm module comprises a buzzer, the human-computer interaction module comprises a touch display screen, the state display module comprises a state display lamp, the intelligent control module comprises a main controller, and the main controller is electrically connected with the photoelectric sensor, the first relay, the second relay, the magnetic field sensor, the voltage sensor, the current sensor, the buzzer, the touch display screen and the state display lamp respectively.
By adopting the technical scheme, the magnetic field sensing is used for detecting whether the accessed micro-grid is a direct current micro-grid or an alternating current micro-grid; the voltage sensor is used for detecting the voltage input by the accessed micro-grid, and the current sensor is used for detecting the current input by the accessed micro-grid; the direct current transformer is used for converting the voltage output by the conversion module or the voltage output by the direct current micro-grid into a voltage with a stable numerical value and merging the voltage into the power grid; the buzzer is used for giving an alarm when the voltage or the current detected by the detection module is greater than a set value; the touch display screen is used for providing a human-computer interaction interface; the state display lamp is used for displaying the state of the hybrid micro-grid application platform; the main controller is used for receiving signal data uploaded by the photoelectric sensor, the magnetic field sensor, the voltage sensor and the current sensor and controlling the first relay, the second relay, the buzzer, the touch display screen and the state display lamp to automatically work according to the received signal data.
The intelligent control module further comprises an AI chip, the AI chip is integrated inside the main controller, the AI chip is electrically connected with the main controller, and the AI chip is used for processing the data uploaded by the photoelectric sensor, the magnetic field sensor, the voltage sensor and the current sensor and feeding back the processed data result to the main controller.
By adopting the technical scheme, the AI chip can be used for processing the data uploaded by the photoelectric sensor, the magnetic field sensor, the voltage sensor and the current sensor, the work load of the main controller is effectively reduced, and the response speed of the hybrid micro-grid application platform during operation is improved.
The invention also provides a control method of the hybrid microgrid application platform, which comprises the following steps:
the method comprises the following steps: working parameters of the intelligent identification module, the detection module, the protection module, the alarm module and the intelligent control module are set through a human-computer interaction interface provided by the human-computer interaction module, and the hybrid microgrid application platform is operated through the human-computer interaction interface to carry out an automatic operation mode;
step two: when the access module is accessed to the hybrid microgrid, the intelligent identification module actively identifies whether the accessed hybrid microgrid is a direct-current microgrid or an alternating-current microgrid and uploads a detection result to the intelligent control module;
step three: when the identified hybrid microgrid is a direct-current microgrid, the intelligent control module controls the conversion module to stop acting, and when the identified hybrid microgrid is an alternating-current microgrid, the intelligent control module controls the conversion module to convert alternating current output by the alternating-current microgrid into direct current;
step four: when the voltage or the current detected by the detection module is greater than a set value, the intelligent control module controls the alarm module to give an alarm, controls the man-machine interaction module to display detailed alarm information and controls the state display module to display an abnormal working state, controls the protection module to cut off the corresponding hybrid microgrid when the voltage or the current detected by the detection module is greater than the set value, and controls the protection module to cut on the corresponding hybrid microgrid when the voltage or the current detected by the detection module conforms to the set value;
step five: after the hybrid micro-grid is connected, the voltage transformation output module transforms the voltage output by the conversion module or the voltage output by the direct current micro-grid into a voltage with a stable value and then the voltage is merged into the power grid.
By adopting the control method of the hybrid micro-grid application platform provided by the technical scheme, the steps are simple and reasonable, especially the stable operation of the hybrid micro-grid application platform can be ensured, the difficulty of accessing the micro-grid is reduced, the labor cost is reduced, the maintenance efficiency is improved, and the working intensity of workers is reduced.
In summary, the invention mainly has the following beneficial effects:
1. the invention provides a mixed micro-grid application platform which mainly comprises an access module, a conversion module, an intelligent identification module, a detection module, a protection module, a voltage transformation output module, an alarm module, a human-computer interaction module, a state display module and an intelligent control module, can automatically identify whether the accessed mixed micro-grid is a direct current micro-grid or an alternating current micro-grid, does not need to consider the type of the mixed micro-grid when accessing the mixed micro-grid, enables the access of the mixed micro-grid to be simple and trouble-saving, can effectively reduce the requirement on professional literacy of workers, thereby saving labor cost, can intelligently convert alternating current input by the alternating current micro-grid into direct current, can reduce the manufacturing cost of a circuit by utilizing the direct current to transmit power, has small active power loss of the circuit, is not limited by power transmission distance, has good system stability, and can limit the short-circuit current of the system, the micro-grid fault diagnosis system has the advantages that the regulation speed is high, the operation is reliable, when the voltage or the current input by the accessed micro-grid is greater than a set value, the alarm module can give an alarm to inform workers of timely arriving at the site to overhaul the fault when the voltage or the current is greater than the set value, meanwhile, the corresponding micro-grid with the input voltage or the current greater than the set value can be cut off, the micro-grid with the fault removed is automatically connected, the micro-grid can automatically operate, the intelligent degree is high, the investment of labor cost can be effectively reduced, and the stable reliability of the system is improved;
2. the control method of the hybrid microgrid application platform provided by the invention has simple and reasonable steps, and particularly can ensure the stable operation of the hybrid microgrid application platform, reduce the difficulty of accessing a microgrid, reduce the labor cost, improve the maintenance efficiency and reduce the working strength of workers.
Drawings
Fig. 1 is a schematic diagram of a hybrid micro-grid application platform according to the present invention;
FIG. 2 is a schematic diagram of a hybrid microgrid application platform according to the present invention;
FIG. 3 is a schematic diagram of a partial connection of a hybrid micro-grid application platform according to the present invention;
fig. 4 is a flowchart of a control method of the hybrid microgrid application platform according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to fig. 3, the embodiment provides a hybrid microgrid application platform, which mainly comprises an access module, a conversion module, an intelligent identification module, a detection module, a protection module, a voltage transformation output module, an alarm module, a human-computer interaction module, a state display module and an intelligent control module, wherein the intelligent identification module, the detection module, the protection module, the alarm module, the human-computer interaction module and the state display module are all electrically connected with the intelligent control module, and the intelligent control module is used for controlling the automatic operation of the conversion module, the intelligent identification module, the detection module, the protection module, the voltage transformation output module, the alarm module, the human-computer interaction module and the state display module.
Specifically, the access module is used for accessing a hybrid microgrid, the hybrid microgrid comprises a direct-current microgrid and an alternating-current microgrid, and in order to realize the function of the access module, the access module of the embodiment specifically comprises a wiring terminal and a photoelectric sensor used for detecting whether the wiring terminal is accessed to the hybrid microgrid or not, the wiring terminal is used for accessing the microgrid, and the photoelectric sensor is used for detecting whether the corresponding wiring terminal is accessed to the microgrid or not so as to realize the purpose of automatically detecting whether the microgrid is accessed or not.
Specifically, referring to fig. 1 and 3, the conversion module is configured to convert ac power into dc power, the protection module is configured to cut off or connect the hybrid microgrid, when the voltage or current detected by the detection module is greater than a set value, the intelligent control module controls the protection module to cut off the corresponding hybrid microgrid, and when the voltage or current detected by the detection module conforms to the set value, the intelligent control module controls the protection module to connect the corresponding hybrid microgrid; in order to realize the specific functions of the conversion module and the protection module, the conversion module of the embodiment specifically comprises an inverter, the protection module comprises a first relay and a second relay, the first relay is respectively connected with the second relay in parallel and the inverter in series, when the intelligent identification module automatically identifies that the accessed hybrid microgrid is a direct-current microgrid, the first relay is closed, and the second relay is opened; when the intelligent identification module automatically identifies that the accessed hybrid micro-grid is an alternating current micro-grid, the first relay is switched off, the second relay is switched on, and the inverter is switched on at the moment to convert alternating current into direct current.
Specifically, the intelligent identification module is used for automatically identifying whether the accessed hybrid microgrid is a direct-current microgrid or an alternating-current microgrid, and uploading a detection result to the intelligent control module, when the identified hybrid microgrid is the direct-current microgrid, the intelligent control module controls the conversion module not to act, and when the identified hybrid microgrid is the alternating-current microgrid, the intelligent control module controls the conversion module to convert alternating current output by the alternating-current microgrid into direct current; the intelligent identification module comprises a magnetic field sensor, the magnetic field sensor is used for detecting whether the accessed micro-grid is a direct current micro-grid or an alternating current micro-grid, and the detected data are uploaded to the intelligent control module in real time for analysis and processing.
Specifically, the detection module is used for detecting the voltage and current output by the accessed hybrid microgrid and uploading the detected voltage and current to the intelligent control module in real time, when the voltage or current detected by the detection module is greater than a set value, the intelligent control module controls the alarm module to give an alarm, and simultaneously controls the man-machine interaction module to display detailed alarm information and the control state display module to display an abnormal working state; the detection module comprises a voltage sensor and a current sensor, the voltage sensor is used for detecting the voltage input by the accessed micro-grid, and the current sensor is used for detecting the current input by the accessed micro-grid.
Specifically, the voltage transformation output module is used for converting the voltage output by the conversion module or the voltage output by the direct current microgrid into a voltage with a stable numerical value and merging the voltage into the power grid, wherein the voltage transformation output module comprises a direct current transformer, and the direct current transformer is used for converting the voltage output by the conversion module or the voltage output by the direct current microgrid into the voltage with the stable numerical value and merging the voltage into the power grid.
Specifically, the alarm module is used for giving an alarm when the voltage or the current detected by the detection module is greater than a set value so as to inform a worker to timely arrive at a site to overhaul the fault when the voltage or the current is greater than the set value, wherein the alarm module comprises a buzzer which is used for giving an alarm when the voltage or the current detected by the detection module is greater than the set value.
Specifically, the human-computer interaction module is used for providing a human-computer interaction interface, wherein the human-computer interaction module comprises a touch display screen, the touch display screen is used for providing the human-computer interaction interface, and the human-computer interaction interface is used for enabling a worker to communicate with the hybrid microgrid application platform and operate the hybrid microgrid application platform.
Specifically, the status display module includes a status display lamp, and the status display lamp is configured to display a status of the hybrid microgrid application platform, for example, a green light displayed by the status display lamp may indicate that the hybrid microgrid application platform is operating normally, and a red light displayed by the status display lamp may indicate that the hybrid microgrid application platform is operating in a fault.
Specifically, intelligent control module still includes the AI chip, the AI chip integration is in the inside of main control unit, and AI chip and main control unit electric connection, the AI chip is used for handling photoelectric sensor, magnetic field sensor, the data that voltage sensor and current sensor uploaded, and feed back the data result of handling to main control unit, photoelectric sensor is handled to usable AI chip, magnetic field sensor, the data that voltage sensor and current sensor uploaded, effectively reduce main control unit's work burden, thereby improve the response speed when this mixed type microgrid application platform moves.
The main controller may be a central processing unit.
Specifically, as shown in fig. 1, the hybrid microgrid application platform further comprises a positioning module, the positioning module is a GPS positioning module, the GPS positioning module is electrically connected with the main controller, and the GPS positioning module is used for positioning the geographic position of the hybrid microgrid application platform, so that when the hybrid microgrid application platform is convenient for later maintenance, a worker can quickly find the hybrid microgrid application platform at a target position through navigation, and therefore the overhaul efficiency is improved.
Specifically, as shown in fig. 1, the hybrid microgrid application platform further comprises a communication module, the communication module is electrically connected with the main controller, the communication module comprises at least one of a wireless network card, a Lora communication module, an NB-iot communication module, a 4G communication module and a 5G communication module, and the hybrid microgrid application platform can be used for realizing the function of remote communication, so that the hybrid microgrid application platform accords with the development trend of the current internet of things, and can better meet the use requirements.
As shown in fig. 4, in order to ensure stable operation of the hybrid microgrid application platform, reduce difficulty in accessing the microgrid, reduce labor cost, improve maintenance efficiency, and reduce working strength of workers, the present embodiment further provides a control method for the hybrid microgrid application platform, which includes the following steps:
the method comprises the following steps: working parameters of the intelligent identification module, the detection module, the protection module, the alarm module and the intelligent control module are set through a human-computer interaction interface provided by the human-computer interaction module, and the hybrid microgrid application platform is operated through the human-computer interaction interface to carry out an automatic operation mode;
step two: when the access module is accessed to the hybrid microgrid, the intelligent identification module actively identifies whether the accessed hybrid microgrid is a direct-current microgrid or an alternating-current microgrid and uploads a detection result to the intelligent control module;
step three: when the identified hybrid microgrid is a direct-current microgrid, the intelligent control module controls the conversion module to stop acting, and when the identified hybrid microgrid is an alternating-current microgrid, the intelligent control module controls the conversion module to convert alternating current output by the alternating-current microgrid into direct current;
step four: when the voltage or the current detected by the detection module is greater than a set value, the intelligent control module controls the alarm module to give an alarm, controls the man-machine interaction module to display detailed alarm information and controls the state display module to display an abnormal working state, controls the protection module to cut off the corresponding hybrid microgrid when the voltage or the current detected by the detection module is greater than the set value, and controls the protection module to cut on the corresponding hybrid microgrid when the voltage or the current detected by the detection module conforms to the set value;
step five: after the hybrid micro-grid is connected, the voltage transformation output module transforms the voltage output by the conversion module or the voltage output by the direct current micro-grid into a voltage with a stable value and then the voltage is merged into the power grid.
In addition, as shown in fig. 2, during specific use, each accessed microgrid corresponds to a group of access modules, a monitoring module, an intelligent identification module, a protection module, a conversion module and a transformation output module, the hybrid microgrid application platform can be accessed to n (where n is 1, 2, 3, 4.) microgrids, the n microgrids correspond to n groups of access modules, the monitoring module, the intelligent identification module, the protection module, the conversion module and the transformation output module, only one group of state display modules, an alarm module, a human-computer interaction module, a positioning module, a communication module and an intelligent control module need to be shared, the construction cost of the hybrid microgrid application platform can be effectively saved, and unified management is facilitated.
To sum up:
1. the invention provides a mixed micro-grid application platform which mainly comprises an access module, a conversion module, an intelligent identification module, a detection module, a protection module, a voltage transformation output module, an alarm module, a human-computer interaction module, a state display module and an intelligent control module, can automatically identify whether the accessed mixed micro-grid is a direct current micro-grid or an alternating current micro-grid, does not need to consider the type of the mixed micro-grid when accessing the mixed micro-grid, enables the access of the mixed micro-grid to be simple and trouble-saving, can effectively reduce the requirement on professional literacy of workers, thereby saving labor cost, can intelligently convert alternating current input by the alternating current micro-grid into direct current, can reduce the manufacturing cost of a circuit by utilizing the direct current to transmit power, has small active power loss of the circuit, is not limited by power transmission distance, has good system stability, and can limit the short-circuit current of the system, the micro-grid fault diagnosis system has the advantages that the regulation speed is high, the operation is reliable, when the voltage or the current input by the accessed micro-grid is greater than a set value, the alarm module can give an alarm to inform workers of timely arriving at the site to overhaul faults when the voltage or the current is greater than the set value, meanwhile, the micro-grid corresponding to the input voltage or the current can be cut off, the micro-grid with the faults removed is automatically connected, the micro-grid can automatically operate, the intelligent degree is high, the investment of labor cost can be effectively reduced, and the stability and the reliability of the system are improved;
2. the control method of the hybrid microgrid application platform provided by the invention has simple and reasonable steps, and particularly can ensure the stable operation of the hybrid microgrid application platform, reduce the difficulty of accessing a microgrid, reduce the labor cost, improve the maintenance efficiency and reduce the working strength of workers.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (10)

1. A hybrid microgrid application platform is characterized in that: the intelligent monitoring system comprises an access module, a conversion module, an intelligent identification module, a detection module, a protection module, a voltage transformation output module, an alarm module, a human-computer interaction module, a state display module and an intelligent control module;
the access module is used for accessing a hybrid microgrid, and the hybrid microgrid comprises a direct-current microgrid and an alternating-current microgrid;
the conversion module is used for converting alternating current into direct current;
the intelligent identification module is used for automatically identifying whether the accessed hybrid micro-grid is the direct current micro-grid or the alternating current micro-grid and uploading a detection result to the intelligent control module;
the detection module is used for detecting the voltage and the current output by the accessed hybrid micro-grid and uploading the detected voltage and current to the intelligent control module in real time;
the protection module is used for switching off or switching on the hybrid micro-grid;
the voltage transformation output module is used for transforming the voltage output by the conversion module or the voltage output by the direct current micro-grid into a voltage with a stable value and merging the voltage with the power grid;
the alarm module is used for giving an alarm when the voltage or the current detected by the detection module is greater than a set value so as to inform a worker to timely arrive at a site to overhaul the fault when the voltage or the current is greater than the set value;
the human-computer interaction module is used for providing a human-computer interaction interface, and the human-computer interaction interface is used for enabling a worker to communicate with the hybrid micro-grid application platform and operate the hybrid micro-grid application platform;
the state display module is used for displaying the state of the hybrid micro-grid application platform;
the intelligent control module is used for controlling the conversion module, the intelligent identification module, the detection module, the protection module, the voltage transformation output module, the alarm module, the human-computer interaction module and the state display module to automatically work.
2. The hybrid microgrid application platform of claim 1, wherein: the intelligent identification module, the detection module, the protection module, the alarm module, the human-computer interaction module and the state display module are electrically connected with the intelligent control module.
3. The hybrid microgrid application platform of claim 2, wherein: when the identified hybrid microgrid is the direct-current microgrid, the intelligent control module controls the conversion module not to act, and when the identified hybrid microgrid is the alternating-current microgrid, the intelligent control module controls the conversion module to convert alternating current output by the alternating-current microgrid into direct current.
4. The hybrid microgrid application platform of claim 3, wherein: when the voltage or the current detected by the detection module is greater than a set value, the intelligent control module controls the alarm module to give an alarm, and simultaneously controls the human-computer interaction module to display detailed alarm information and controls the state display module to display an abnormal working state.
5. The hybrid microgrid application platform of claim 4, wherein: when the voltage or the current detected by the detection module is greater than a set value, the intelligent control module controls the protection module to cut off the corresponding hybrid microgrid, and when the voltage or the current detected by the detection module conforms to the set value, the intelligent control module controls the protection module to switch on the corresponding hybrid microgrid.
6. The hybrid microgrid application platform of claim 5, wherein: the access module comprises a wiring terminal and a photoelectric sensor used for detecting whether the wiring terminal is accessed to the hybrid micro-grid or not.
7. The hybrid microgrid application platform of claim 6, wherein: the conversion module comprises an inverter, the protection module comprises a first relay and a second relay, the first relay is respectively connected with the second relay and the inverter in parallel, and the second relay is connected with the inverter in series.
8. The hybrid microgrid application platform of claim 7, wherein: the intelligent identification module comprises a magnetic field sensor, the detection module comprises a voltage sensor and a current sensor, the voltage transformation output module comprises a direct current transformer, the alarm module comprises a buzzer, the human-computer interaction module comprises a touch display screen, the state display module comprises a state display lamp, the intelligent control module comprises a main controller, and the main controller is respectively electrically connected with the photoelectric sensor, the first relay, the second relay, the magnetic field sensor, the voltage sensor, the current sensor, the buzzer, the touch display screen and the state display lamp.
9. The hybrid microgrid application platform of claim 8, wherein: the intelligent control module further comprises an AI chip, wherein the AI chip is integrated inside the main controller, the AI chip is electrically connected with the main controller, and the AI chip is used for processing the data uploaded by the photoelectric sensor, the magnetic field sensor, the voltage sensor and the current sensor and feeding back the processed data result to the main controller.
10. A method of controlling a hybrid microgrid application platform according to any one of claims 1 to 9, characterized in that: the method comprises the following steps:
the method comprises the following steps: working parameters of the intelligent identification module, the detection module, the protection module, the alarm module and the intelligent control module are set through a human-computer interaction interface provided by the human-computer interaction module, and the hybrid microgrid application platform is operated through the human-computer interaction interface to carry out an automatic operation mode;
step two: when the access module is accessed to the hybrid microgrid, the intelligent identification module actively identifies whether the accessed hybrid microgrid is a direct-current microgrid or an alternating-current microgrid and uploads a detection result to the intelligent control module;
step three: when the identified hybrid microgrid is a direct-current microgrid, the intelligent control module controls the conversion module to stop acting, and when the identified hybrid microgrid is an alternating-current microgrid, the intelligent control module controls the conversion module to convert alternating current output by the alternating-current microgrid into direct current;
step four: when the voltage or the current detected by the detection module is greater than a set value, the intelligent control module controls the alarm module to give an alarm, controls the man-machine interaction module to display detailed alarm information and controls the state display module to display an abnormal working state, controls the protection module to cut off the corresponding hybrid microgrid when the voltage or the current detected by the detection module is greater than the set value, and controls the protection module to cut on the corresponding hybrid microgrid when the voltage or the current detected by the detection module conforms to the set value;
step five: after the hybrid micro-grid is connected, the voltage transformation output module transforms the voltage output by the conversion module or the voltage output by the direct current micro-grid into a voltage with a stable value and then the voltage is merged into the power grid.
CN202111334302.9A 2021-11-11 2021-11-11 Hybrid micro-grid application platform and control method thereof Withdrawn CN114024368A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116388111A (en) * 2023-04-18 2023-07-04 杭州欣美成套电器制造有限公司 In-situ measurement and control protection integrated device of electric micro-grid

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116388111A (en) * 2023-04-18 2023-07-04 杭州欣美成套电器制造有限公司 In-situ measurement and control protection integrated device of electric micro-grid
CN116388111B (en) * 2023-04-18 2024-02-20 杭州欣美成套电器制造有限公司 In-situ measurement and control protection integrated device of electric micro-grid

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Application publication date: 20220208