CN115776177A - Protection and control system, method and equipment for micro-grid - Google Patents
Protection and control system, method and equipment for micro-grid Download PDFInfo
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Abstract
The invention discloses a protection and control system, a method and equipment of a microgrid, wherein the protection and control system comprises a microgrid central controller, a microgrid control module and a microgrid control module, wherein the microgrid central controller is used for sending a corresponding control instruction to a microgrid execution system according to a judgment result; the micro-grid management system is used for acquiring energy management operation data and monitoring operation data in real time and sending the energy management operation data and the monitoring operation data to the micro-grid central controller; when a power dispatching adjustment instruction sent by a micro-grid central controller is obtained, adjusting power dispatching and generating updated power dispatching; and the micro-grid execution system is used for executing corresponding control operation according to the control instruction when the control instruction sent by the micro-grid central controller is obtained. The technical problem that the existing micro-grid power supply system is prone to failure, and power scheduling is not timely due to insufficient power supply is solved. According to the invention, the electric control can be realized on the electric quantity of electric leakage and overload load, the control protection effect of the microgrid is improved, and the stability and reliability of the microgrid during power supply are enhanced.
Description
Technical Field
The invention relates to the technical field of micro-grids, in particular to a protection and control system, a method and equipment for a micro-grid.
Background
With the continuous progress of the industrial process, the demand for electric power is rapidly increased, and for improving industrial and civil power supply, electric power is distributed and distributed in an electric power system through a micro-grid, the micro-grid is developed and extended, large-scale access of a distributed power supply and renewable energy sources can be fully promoted, the method is an effective mode for realizing an active power distribution network, and the traditional power grid is transited to a smart power grid.
Although the active power distribution can be realized to electric power in the use of current little electric wire netting power supply system, but reduced control and the safeguard effect to electric power energy storage management at electric power distribution, lead to the electric power electric leakage condition of electric power energy storage unstable inadequately or energy storage easily, make little electric wire netting power supply system break down easily, cause the power supply not enough to lead to electric power scheduling untimely to make industry and resident's power consumption expense rise, reduced the reliability and the stability of little electric wire netting power supply.
Disclosure of Invention
The invention provides a protection and control system, a method and equipment for a microgrid, and solves the technical problems that the control and protection effects on power energy storage management are reduced by the conventional power distribution, the power energy storage is not stable enough or the stored power leaks, the microgrid power supply system is easy to break down, the power dispatching is not timely due to insufficient power supply, the power consumption cost of industry and residents is increased, and the reliability and stability of the microgrid power supply are reduced.
The invention provides a protection and control system of a microgrid, and relates to a microgrid management system, a microgrid coordination system and a microgrid execution system, wherein the microgrid coordination system is respectively connected with the microgrid execution system and the microgrid management system; the system comprises:
the micro-grid system comprises a micro-grid central controller, and is used for adjusting a power generation plan according to the acquired energy management operation data of the micro-grid management system and generating an updated power generation plan; sending an adjusting instruction for adjusting the power dispatching of the microgrid to the microgrid management system according to the updated power generation plan; acquiring monitoring operation data of the microgrid management system in real time, judging whether the monitoring operation data is abnormal or not, and sending a corresponding control instruction to the microgrid execution system according to a judgment result;
the micro-grid management system is used for acquiring energy management operation data and monitoring operation data in real time and sending the energy management operation data and the monitoring operation data to the micro-grid central controller; when a power dispatching adjustment instruction sent by the micro-grid central controller is obtained, adjusting the power dispatching, and generating an updated power dispatching;
and the micro-grid execution system is used for executing corresponding control operation according to the control instruction when the control instruction sent by the micro-grid central controller is obtained.
Optionally, the microgrid central controller is further configured to obtain historical operation data of the distributed power supplies, predict power generation requirements of the distributed power supplies according to the historical operation data, and make a power generation plan.
Optionally, the microgrid management system comprises an energy management control module and a monitoring protection module, and the energy management control module and the monitoring protection module are both connected with the microgrid central controller;
the energy management control module is used for acquiring energy management operation data of the microgrid in real time and sending the energy management operation data to the microgrid central controller; predicting the power environment of the microgrid, adjusting the power dispatching according to the power environment, generating an updated power dispatching, and managing the power supply load of the microgrid according to the updated power dispatching;
the monitoring protection module is used for predicting the power environment of the microgrid, monitoring the power data of the stored energy power and detecting the power supply state of the power; and sending the power environment, the power data and the power supply state to the micro-grid central controller.
Optionally, the energy management control module includes an environment detection unit and a power scheduling unit; the environment detection unit and the power dispatching unit are both connected with the microgrid central controller;
the environment detection unit is used for acquiring weather information of the environment where the microgrid is located in real time, predicting according to the weather information, generating prediction information and sending the prediction information to the microgrid central controller;
the power scheduling unit is used for adjusting the power scheduling according to an adjusting power scheduling instruction sent by the microgrid central controller and generating an updated power scheduling; and scheduling according to the updated power scheduling.
Optionally, the monitoring protection module includes a voltage energy storage monitoring unit, an electric power data acquisition unit and a fault protection unit;
the voltage energy storage monitoring unit comprises an energy storage inverter and is used for performing alternating current-direct current conversion on the energy storage power and the power supply power;
the power data acquisition unit comprises a voltage acquisition unit for acquiring voltage data and power transmission data and feeding back the voltage data and the power transmission data to the fault protection unit;
the fault protection unit comprises a leakage protector for detecting the power transmission state; and judging the power transmission state according to the power transmission data, and feeding back a judgment result to the microgrid central controller.
Optionally, the microgrid execution system comprises an intelligent gateway circuit breaker, a load regulation and control module and a distributed power generation module;
the intelligent gateway circuit breaker is used for receiving a control instruction of the microgrid central controller, disconnecting a switching device where abnormal current is located according to the control instruction and controlling a current switch corresponding to the distributed power generation module;
and the load regulation and control module is used for generating overload current when the intelligent gateway circuit breaker controls the current switch, and implementing current regulation and control according to the overload current.
And the distributed power generation module is used for collecting power resources and supplying power according to the updated power scheduling.
Optionally, the distributed power generation module comprises a wind power generation assembly, a photovoltaic power generation assembly and a distribution substation; the wind power generation assembly and the photovoltaic power generation assembly are electrically connected with the power distribution station;
the wind power generation assembly is used for collecting power resources and inputting the power resources into an energy storage unit of the power distribution station;
the photovoltaic power generation assembly is used for collecting power resources and inputting the power resources into an energy storage unit of the power distribution station;
and the power distribution station is used for receiving the power resources input by the wind power generation assembly and the photovoltaic power generation assembly and supplying power according to the updated power scheduling.
Optionally, the distribution substation includes an energy storage unit for receiving the power resource input by the wind power generation assembly and the photovoltaic power generation assembly, and storing the power resource.
A protection and control method for a microgrid provided by a second aspect of the present invention includes:
acquiring energy management operation data and monitoring operation data in real time;
adjusting a power generation plan according to the energy management operation data to generate an updated power generation plan;
adjusting the power dispatching of the microgrid according to the updated power generation plan to generate an updated power dispatching;
and judging whether the monitoring operation data is abnormal according to the operation data threshold corresponding to the updated power scheduling, generating a corresponding control instruction according to a judgment result, and executing corresponding control operation according to the control instruction.
In a third aspect of the present invention, an electronic device includes a memory and a processor, where the memory stores a computer program, and the computer program, when executed by the processor, causes the processor to execute the steps of the method for protecting and controlling a microgrid described above.
According to the technical scheme, the invention has the following advantages:
the energy management system collects energy management operation data and monitoring operation data in real time and sends the data to the microgrid central controller; adjusting a power generation plan through the acquired energy management operation data of the micro-grid management system to generate an updated power generation plan; sending an adjusting instruction for adjusting the power dispatching of the microgrid to a microgrid management system according to the updated power generation plan; judging whether the monitoring operation data is abnormal or not, and sending a corresponding control instruction to the micro-grid execution system according to a judgment result; when a power dispatching adjustment instruction sent by a micro-grid central controller is obtained, adjusting power dispatching and generating updated power dispatching; and when a control instruction sent by the microgrid central controller is obtained, executing corresponding control operation according to the control instruction. The problem of current power distribution reduce control and the protective effect to electric power energy storage management, lead to the electric power of electric power energy storage stability inadequately or energy storage to take place the electric leakage condition easily, make little electric wire netting power supply system break down easily, cause the power supply not enough to lead to electric power scheduling untimely to make industry and resident's power consumption expense rise, reduced the reliability and the stable technique of little electric wire netting power supply.
According to the invention, the micro-grid central controller controls the micro-grid execution system and the micro-grid management system to execute operation power supply, the power resources collected by the distributed power generation modules can be controlled and protected in real time through the cooperation of the monitoring protection modules, the electric quantity of electric leakage and overload load can be controlled, and the control protection effect of the micro-grid is improved, so that the stability and reliability of the micro-grid during power supply are enhanced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive labor.
Fig. 1 is a block diagram of a protection and control system of a microgrid according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating steps of a method for protecting and controlling a microgrid according to a second embodiment of the present invention.
Detailed Description
The embodiment of the invention provides a protection and control system, a method and equipment for a microgrid, which are used for solving the technical problems that the control and protection effects on power energy storage management are reduced by the existing power distribution, the power energy storage is not stable enough or the stored power leaks, the microgrid power supply system is easy to break down, the power dispatching is not timely due to insufficient power supply, the power consumption cost of industry and residents is increased, and the reliability and stability of the microgrid power supply are reduced.
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a block diagram of a protection and control system for a microgrid according to an embodiment of the present invention.
The invention provides a protection and control system of a microgrid, which relates to a microgrid management system, a microgrid coordination system and a microgrid execution system, wherein the microgrid coordination system is respectively connected with the microgrid execution system and the microgrid management system; the system comprises:
the microgrid system 101 comprises a microgrid central controller, and is used for adjusting a power generation plan through the acquired energy management operation data of the microgrid management system and generating an updated power generation plan; sending an adjusting instruction for adjusting the power dispatching of the microgrid to a microgrid management system according to the updated power generation plan; and acquiring monitoring operation data of the microgrid management system in real time, judging whether the monitoring operation data is abnormal or not, and sending a corresponding control instruction to the microgrid execution system according to a judgment result.
It should be noted that the energy management operation data refers to operation data such as voltage, current, power, and the like.
The power generation plan refers to a plan for making power generation or supply data of a distribution substation or a power plant in accordance with one cycle.
The updated power generation plan refers to a new power generation plan generated by adjusting an old power generation plan based on the acquired energy management operation data.
The power scheduling refers to scheduling of power generation or supply data of a distribution substation or a power plant according to an updated power generation plan.
The monitoring operation data refers to weather information of the environment where the micro-grid is located, power transmission data of energy storage power, voltage data, overload current data and the like.
In the embodiment of the invention, the energy management operation data of the microgrid management system is acquired in real time, and the existing power generation plan is adjusted according to the energy management operation data to generate the updated power generation plan. And adjusting the power dispatching of the microgrid through the updated power generation plan to generate updated power dispatching, so that the distributed power supply can supply power according to the updated power dispatching.
Specifically, it is further required to obtain monitoring operation data in real time, respectively determine whether a plurality of operation data of the monitoring operation data are abnormal according to each data threshold of the distributed power supply, when abnormal data are determined, send a corresponding control instruction for an operation device corresponding to the abnormal data, and execute the control instruction operation by the microgrid execution system.
The microgrid management system 102 is used for acquiring energy management operation data and monitoring operation data in real time and sending the energy management operation data and the monitoring operation data to a microgrid central controller; and when a power dispatching adjustment instruction sent by the micro-grid central controller is obtained, adjusting power dispatching and generating updated power dispatching.
The updating of the power schedule refers to generating a new power schedule by adjusting an old power schedule according to the acquired energy management operation data and monitoring operation data.
In a specific embodiment, an energy management control module in the microgrid management system has the functions of power scheduling optimization, load management, real-time monitoring, automatic realization of microgrid synchronization and the like, and therefore the energy management control module and a monitoring protection module in the microgrid management system have the functions of monitoring and detecting and are matched with each other, the power environment can be predicted, the influence of the environment is not easily caused when the microgrid supplies power is protected, meanwhile, the power monitoring can be performed on the stored energy power under the monitoring of the monitoring protection module, and whether power leakage and insufficient power supply occur when the power is stored and supplied is monitored, and the control and protection effects on the microgrid power supply are improved.
And the microgrid execution system 103 is used for executing corresponding control operation according to the control instruction when the control instruction sent by the microgrid central controller is obtained.
It should be noted that the microgrid execution system comprises an intelligent gateway circuit breaker, a load regulation and control module and a distributed power generation module.
In the embodiment of the invention, when a control instruction sent by a microgrid central controller is obtained, corresponding control operation is adopted according to the control instruction, for example, an abnormal current condition is received, namely an intelligent network shutoff circuit device is adopted to execute the operation of disconnecting a switching device at which abnormal current is positioned; receiving the overload current, namely, adopting a load regulation and control module to regulate and control the overload current; and receiving the power generation information, namely, adopting a distributed power generation module to implement power generation.
Optionally, the microgrid system 101 includes a microgrid central controller, and is further configured to obtain historical operating data of the distributed power supplies, predict power generation demands of the distributed power supplies according to the historical operating data, and make a power generation plan.
The historical operation data refers to historical data of the power generation power, load, voltage, current, power and the like of the distributed power supply.
The power generation requirement refers to the amount of power required by the environment in which the distributed power source is located.
In the embodiment of the invention, the generated power and the load demand of the distributed power supply are predicted, and a corresponding power generation plan is formulated according to the prediction result.
Optionally, the microgrid management system 102 includes an energy management control module and a monitoring protection module, both of which are connected to the microgrid central controller;
the energy management control module is used for acquiring energy management operation data of the microgrid in real time and sending the energy management operation data to the microgrid central controller; predicting the power environment of the microgrid, adjusting power scheduling according to the power environment, generating updated power scheduling, and managing the power supply load of the microgrid according to the updated power scheduling;
the monitoring protection module is used for predicting the power environment of the microgrid, monitoring the power data of the energy storage power and detecting the power supply state of the power; and sending the power environment, the power data and the power supply state to the micro-grid central controller.
It should be noted that the energy management control module includes an environment detection unit and a power scheduling unit; the monitoring protection module comprises a voltage energy storage monitoring unit, a power data acquisition unit and a fault protection unit.
In the embodiment of the invention, the environment detection unit in the energy management control unit module monitors the environment where the micro-grid is located, predicts the environmental condition to be generated in advance according to the monitoring condition, for example, the power supply to the micro-grid is unfavorable, and adjusts the power dispatching according to the environmental condition, so that the micro-grid can continuously supply power under the environmental condition to be generated.
The monitoring protection module collects voltage data, power transmission data, current load data and the like of the microgrid in real time, and when the data are judged to be abnormal, protection measures can be executed, and the protection function is achieved.
Optionally, the energy management control module includes an environment detection unit and a power scheduling unit; the environment detection unit and the power dispatching unit are both connected with the micro-grid central controller;
the environment detection unit is used for acquiring environment information of the environment where the micro-grid is located in real time, predicting according to the environment information, generating prediction information and sending the prediction information to the micro-grid central controller;
the power dispatching unit is used for adjusting power dispatching according to an adjusting power dispatching instruction sent by the micro-grid central controller and generating updated power dispatching; and performing scheduling according to the updated power scheduling.
In the embodiment of the invention, the environment detection unit is electrically connected with the power scheduling unit, and the environment condition has great influence on the power supply of the micro-grid, so that the environment condition of the environment in the micro-grid management system can be predicted in advance through the environment detection unit, the power scheduling unit can schedule the power supply, the influence of the environment on the power supply distribution of the micro-grid is reduced as much as possible, and the power supply scheduling of the micro-grid is controlled.
Specifically, when the predicted environmental conditions have certain influence on the distribution of the power supply of the microgrid, the existing power dispatching can be adjusted to generate updated power dispatching; and scheduling and power supply are implemented according to the updated power scheduling.
Optionally, the monitoring protection module comprises a voltage energy storage monitoring unit, a power data acquisition unit and a fault protection unit;
the voltage energy storage monitoring unit comprises an energy storage inverter and is used for performing alternating current-direct current conversion on the energy storage power and the power supply power;
the power data acquisition unit comprises a voltage acquisition device for acquiring voltage data and power transmission data and feeding back the voltage data and the power transmission data to the fault protection unit;
the fault protection unit comprises a leakage protector for detecting the power transmission state; and judging the power transmission state according to the power transmission data, and feeding back the judgment result to the microgrid central controller.
The storage inverter converts ac power into dc power to charge and store the dc power in the storage battery, and converts the dc power stored in the storage battery into 220 v ac power to be supplied to the electric equipment when power fails.
The voltage collector refers to a device for collecting voltage data in real time.
The leakage protector is used for protecting the electric shock of a person with fatal danger when the equipment has leakage faults, has overload and short-circuit protection functions, can be used for protecting the overload and short circuit of a circuit or a motor, and can also be used for infrequently switching and starting the circuit under normal conditions.
In a specific embodiment, the voltage collector is electrically connected with the microgrid central controller, the microgrid management system supplies power to the microgrid execution system through the microgrid execution system, and in the process of detecting the power voltage through the monitoring protection module, the voltage collector can be used for collecting power data during power supply.
Leakage protector and microgrid central controller electric connection, the condition of taking place the electric leakage through voltage collector collection electric data in-process, accessible leakage protector protects the position that appears the electric leakage, leakage protector has the function that detects and judge leakage current, when taking place electric leakage or insulation breakdown in the major loop, the electric leakage protection switch can be according to the switch element of judged result with main circuit switch-on or disconnection, avoid the electric leakage to cause danger on every side, the protective effect of little electric wire netting when electric power system supplies power has been improved.
The energy storage inverter is electrically connected with the fault protection unit, can control the micro-grid to carry out alternating current-direct current conversion in the power supply and energy storage power process, and can directly supply power for alternating current loads under the condition of no power grid.
Optionally, the microgrid execution system 103 includes an intelligent gateway circuit breaker, a load regulation and control module, and a distributed power generation module;
the intelligent gateway breaker is used for receiving a control instruction of the central controller of the microgrid, disconnecting the switching device where the abnormal current is located according to the control instruction and controlling the current switch corresponding to the distributed power generation module;
and the load regulation and control module is used for generating overload current when the intelligent network turns off the circuit breaker to control the current switch, and implementing current regulation and control according to the overload current.
And the distributed power generation module is used for collecting power resources and supplying power according to the updated power scheduling.
It should be noted that the intelligent gateway breaker can monitor current, voltage, temperature, power factors and electric quantity in real time, and alarm or trip when faults such as undervoltage, overload, overcurrent, overtemperature, ignition, short circuit and the like occur, so as to prevent electrical fire.
The load regulation and control module is a module for regulating and controlling overload current according to a preset load threshold when the overload current occurs;
distributed generation modules refer to implementing power supply/generation in accordance with updated generation schedules and updated power schedules.
In a specific embodiment, the intelligent gateway breaker can close, bear and break current under the condition of a normal loop, and can close, bear and break the switching device of the current under the condition of an abnormal loop within a specified time, so that a circuit switch is controlled according to each dredged current range in the distributed power generation module, and simultaneously, when the circuit switch in a circuit of the distributed power generation module is controlled, the intelligent gateway breaker is matched with a load regulation and control module to provide a current load overload protection function, when the intelligent gateway breaker controls the circuit switch of the distributed power generation module, overload current is generated, the overload protection and current regulation and control functions are provided for an intelligent network turn-off circuit device through the load regulation and control module, the power supply effect of a microgrid is enhanced, the power supply of the microgrid can be controlled, the phenomenon that the microgrid runs in overload is avoided, and the microgrid execution system can be effectively controlled to carry out power transmission.
Optionally, the distributed power generation module comprises a wind power generation assembly, a photovoltaic power generation assembly and a power distribution station; the wind power generation assembly and the photovoltaic power generation assembly are electrically connected with the power distribution station;
the wind power generation assembly is used for collecting power resources and inputting the power resources into an energy storage unit of a power distribution station;
the photovoltaic power generation assembly is used for collecting power resources and inputting the power resources into an energy storage unit of a power distribution station;
and the power distribution station is used for receiving power resources input by the wind power generation assembly and the photovoltaic power generation assembly and supplying power according to the updated power scheduling.
The wind power generation means converting kinetic energy of wind into electric energy.
Photovoltaic power generation refers to the direct conversion of light energy into electrical energy by utilizing the photovoltaic effect of semiconductor interfaces.
A distribution substation refers to a site that delivers electricity to a powered device or user.
In the embodiment of the invention, the wind power generation assemblies and the photovoltaic power generation assemblies are distributed to the micro-grid to collect power, and then the collected power resources are transmitted to the energy storage units of the power distribution station, so that the power supply stability of the micro-grid is improved, and the utilization rate of the resources is improved.
Specifically, the power distribution station is electrically connected with the micro-grid central controller, the wind power generation assembly and the photovoltaic power generation assembly are electrically connected with the micro-grid central controller, collected power resources are converted into electric energy through the power distribution station, and therefore the electric energy is supplied to the micro-grid management system through the micro-grid central controller to be collected and monitored, and the protection effect is provided when power is supplied conveniently.
Optionally, the power distribution station comprises an energy storage unit for receiving the power resources input by the wind power generation assembly and the photovoltaic power generation assembly and storing the power resources.
The energy storage unit is a unit that stores power resources.
In the embodiment of the invention, the power resources input by the wind power generation assembly and the photovoltaic power generation assembly are received in real time and are stored.
The energy management operation data and the monitoring operation data are collected in real time and are sent to the microgrid central controller; adjusting a power generation plan through the acquired energy management operation data of the microgrid management system to generate an updated power generation plan; sending an adjusting instruction for adjusting the power dispatching of the microgrid to a microgrid management system according to the updated power generation plan; judging whether the monitoring operation data is abnormal or not, and sending a corresponding control instruction to the micro-grid execution system according to a judgment result; when a power dispatching adjustment instruction sent by a micro-grid central controller is obtained, adjusting power dispatching and generating updated power dispatching; and when a control instruction sent by the microgrid central controller is obtained, executing corresponding control operation according to the control instruction. The problem of current power distribution reduce control and the protective effect to electric power energy storage management, lead to the electric power of electric power energy storage stability inadequately or energy storage to take place the electric leakage condition easily, make little electric wire netting power supply system break down easily, cause the power supply not enough to lead to the electric power scheduling untimely to make industry and resident's power consumption expense rise, reduced the reliability and the stable technical problem of little electric wire netting power supply.
According to the invention, the microgrid central controller is used for controlling the microgrid execution system and the microgrid management system to execute, operate and supply power, the power resources collected by the distributed power generation modules can be controlled and protected in real time by matching the monitoring protection modules, the electric power system in the microgrid can be controlled and protected, the electric control on electric quantity with electric leakage and overload load can be realized, and the control protection effect of the microgrid is improved, so that the stability and reliability of the microgrid during power supply are enhanced.
Referring to fig. 2, fig. 2 is a flowchart illustrating steps of a method for protecting and controlling a microgrid according to a second embodiment of the present invention.
The invention provides a protection and control method of a microgrid, which relates to a microgrid management system, a microgrid coordination system and a microgrid execution system, wherein the microgrid coordination system is respectively connected with the microgrid execution system and the microgrid management system; the method comprises the following steps:
201. and acquiring energy management operation data and monitoring operation data in real time.
In the embodiment of the invention, the energy management operation data of the microgrid management system is acquired in real time, and the monitoring operation data also needs to be acquired in real time.
202. And adjusting the power generation plan according to the energy management operation data to generate an updated power generation plan.
In the embodiment of the invention, the existing power generation plan is adjusted according to the energy management operation data, and the updated power generation plan is generated.
203. And adjusting the power dispatching of the microgrid according to the updated power generation plan to generate an updated power dispatching.
In the embodiment of the invention, the power scheduling of the microgrid is adjusted by updating the power generation plan, and the updated power scheduling is generated, so that the distributed power supply can supply power according to the updated power scheduling.
204. And judging whether the monitored operation data is abnormal according to the operation data threshold corresponding to the updated power scheduling, generating a corresponding control instruction according to the judgment result, and executing corresponding control operation according to the control instruction.
It should be noted that the operation data threshold refers to a reference value or a rated value of a plurality of operation data, and each operation data and the corresponding operation data threshold are established according to actual conditions.
In the embodiment of the invention, the operation data threshold corresponding to the updated power dispatching is compared with the monitoring operation data, if the operation data threshold is not in the setting range of the operation data threshold, the operation data is regarded as abnormal data, a corresponding control instruction can be made according to the abnormal condition, and corresponding control operation can be taken according to the control instruction.
The energy management operation data and the monitoring operation data are collected in real time and are sent to the microgrid central controller; adjusting a power generation plan through the acquired energy management operation data of the micro-grid management system to generate an updated power generation plan; sending an adjusting instruction for adjusting the power dispatching of the microgrid to a microgrid management system according to the updated power generation plan; judging whether the monitoring operation data is abnormal or not, and sending a corresponding control instruction to the micro-grid execution system according to a judgment result; when a power dispatching adjustment instruction sent by a micro-grid central controller is obtained, adjusting power dispatching and generating updated power dispatching; and when a control instruction sent by the microgrid central controller is obtained, executing corresponding control operation according to the control instruction. The problem of current power distribution reduce control and the protective effect to electric power energy storage management, lead to the electric power of electric power energy storage stability inadequately or energy storage to take place the electric leakage condition easily, make little electric wire netting power supply system break down easily, cause the power supply not enough to lead to electric power scheduling untimely to make industry and resident's power consumption expense rise, reduced the reliability and the stable technique of little electric wire netting power supply.
According to the invention, the microgrid central controller is used for controlling the microgrid execution system and the microgrid management system to execute, operate and supply power, the power resources collected by the distributed power generation modules can be controlled and protected in real time by matching the monitoring protection modules, the electric power system in the microgrid can be controlled and protected, the electric control on electric quantity with electric leakage and overload load can be realized, and the control protection effect of the microgrid is improved, so that the stability and reliability of the microgrid during power supply are enhanced.
An electronic device according to a third embodiment of the present invention includes a memory and a processor, where the memory stores a computer program, and when the computer program is executed by the processor, the processor executes the steps of the method for protecting and controlling a microgrid according to the third embodiment of the present invention.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one type of logical functional division, and other divisions may be realized in practice, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A protection and control system of a microgrid is characterized by relating to a microgrid management system, a microgrid coordination system and a microgrid execution system, wherein the microgrid coordination system is respectively connected with the microgrid execution system and the microgrid management system; the system comprises:
the micro-grid system comprises a micro-grid central controller, and is used for adjusting a power generation plan according to the acquired energy management operation data of the micro-grid management system and generating an updated power generation plan; sending an adjusting instruction for adjusting the power dispatching of the microgrid to the microgrid management system according to the updated power generation plan; acquiring monitoring operation data of the microgrid management system in real time, judging whether the monitoring operation data is abnormal or not, and sending a corresponding control instruction to the microgrid execution system according to a judgment result;
the micro-grid management system is used for acquiring energy management operation data and monitoring operation data in real time and sending the energy management operation data and the monitoring operation data to the micro-grid central controller; when a power dispatching adjustment instruction sent by the micro-grid central controller is obtained, adjusting the power dispatching, and generating an updated power dispatching;
and the micro-grid execution system is used for executing corresponding control operation according to the control instruction when the control instruction sent by the micro-grid central controller is obtained.
2. The microgrid protection and control system of claim 1, wherein the microgrid central controller is further configured to obtain historical operating data of the distributed power sources, predict power generation requirements of the distributed power sources according to the historical operating data, and make a power generation plan.
3. The microgrid protection and control system of claim 1, wherein the microgrid management system comprises an energy management control module and a monitoring protection module, and the energy management control module and the monitoring protection module are both connected with the microgrid central controller;
the energy management control module is used for acquiring energy management operation data of the microgrid in real time and sending the energy management operation data to the microgrid central controller; predicting the power environment of the microgrid, adjusting the power dispatching according to the power environment, generating an updated power dispatching, and managing the power supply load of the microgrid according to the updated power dispatching;
the monitoring protection module is used for predicting the power environment of the microgrid, monitoring the power data of the stored energy power and detecting the power supply state of the power; and sending the power environment, the power data and the power supply state to the micro-grid central controller.
4. The microgrid protection and control system of claim 3, wherein the energy management control module comprises an environment detection unit and a power scheduling unit; the environment detection unit and the power dispatching unit are both connected with the microgrid central controller;
the environment detection unit is used for acquiring weather information of the environment where the microgrid is located in real time, predicting according to the weather information, generating prediction information and sending the prediction information to the microgrid central controller;
the power scheduling unit is used for adjusting the power scheduling according to an adjusting power scheduling instruction sent by the microgrid central controller and generating an updated power scheduling; and scheduling according to the updated power scheduling.
5. The microgrid protection and control system of claim 3, wherein the monitoring and protection module comprises a voltage energy storage monitoring unit, a power data acquisition unit and a fault protection unit;
the voltage energy storage monitoring unit comprises an energy storage inverter and is used for performing alternating current-direct current conversion on the energy storage power and the power supply power;
the power data acquisition unit comprises a voltage acquisition unit which is used for acquiring voltage data and power transmission data and feeding back the voltage data and the power transmission data to the fault protection unit;
the fault protection unit comprises a leakage protector for detecting the power transmission state; and judging the power transmission state according to the power transmission data, and feeding back a judgment result to the microgrid central controller.
6. The microgrid protection and control system of claim 1, wherein the microgrid execution system comprises an intelligent gateway circuit breaker, a load regulation and control module, and a distributed generation module;
the intelligent gateway circuit breaker is used for receiving a control instruction of the microgrid central controller, disconnecting a switching device where abnormal current is located according to the control instruction and controlling a current switch corresponding to the distributed power generation module;
and the load regulation and control module is used for generating overload current when the intelligent gateway circuit breaker controls the current switch, and implementing current regulation and control according to the overload current.
And the distributed power generation module is used for collecting power resources and supplying power according to the updated power scheduling.
7. The microgrid protection and control system of claim 6, wherein the distributed power generation modules comprise wind power generation assemblies, photovoltaic power generation assemblies and distribution substations; the wind power generation assembly and the photovoltaic power generation assembly are electrically connected with the power distribution station;
the wind power generation assembly is used for collecting power resources and inputting the power resources into an energy storage unit of the power distribution station;
the photovoltaic power generation assembly is used for collecting power resources and inputting the power resources into an energy storage unit of the power distribution station;
and the power distribution station is used for receiving the power resources input by the wind power generation assembly and the photovoltaic power generation assembly and supplying power according to the updated power scheduling.
8. The microgrid protection and control system of claim 7, wherein the power distribution station comprises an energy storage unit for receiving the power resources input by the wind power generation assemblies and the photovoltaic power generation assemblies and storing the power resources.
9. A protection and control method of a microgrid is characterized by comprising the following steps:
acquiring energy management operation data and monitoring operation data in real time;
adjusting a power generation plan according to the energy management operation data to generate an updated power generation plan;
adjusting the power dispatching of the microgrid according to the updated power generation plan to generate an updated power dispatching;
and judging whether the monitoring operation data is abnormal according to the operation data threshold corresponding to the updated power scheduling, generating a corresponding control instruction according to a judgment result, and executing corresponding control operation according to the control instruction.
10. An electronic device, comprising a memory and a processor, wherein the memory stores a computer program, and the computer program, when executed by the processor, causes the processor to perform the steps of the method for protecting and controlling a microgrid according to claim 9.
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| CN202211625158.9A CN115776177A (en) | 2022-12-16 | 2022-12-16 | Protection and control system, method and equipment for micro-grid |
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| CN202211625158.9A CN115776177A (en) | 2022-12-16 | 2022-12-16 | Protection and control system, method and equipment for micro-grid |
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