CN114583749A - Operation control method and system for microgrid, electronic device and storage medium - Google Patents
Operation control method and system for microgrid, electronic device and storage medium Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
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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
- H02J13/00002—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 monitoring
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
- H02J3/14—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading
- H02J3/144—Demand-response operation of the power transmission or distribution network
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/388—Islanding, i.e. disconnection of local power supply from the network
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/22—The renewable source being solar energy
- H02J2300/24—The renewable source being solar energy of photovoltaic origin
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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
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/28—The renewable source being wind energy
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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
- H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
- H02J2310/50—The network for supplying or distributing electric power characterised by its spatial reach or by the load for selectively controlling the operation of the loads
- H02J2310/56—The network for supplying or distributing electric power characterised by its spatial reach or by the load for selectively controlling the operation of the loads characterised by the condition upon which the selective controlling is based
- H02J2310/62—The condition being non-electrical, e.g. temperature
- H02J2310/64—The condition being economic, e.g. tariff based load management
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- 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
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
Abstract
The invention discloses an operation control method, a system, electronic equipment and a storage medium of a microgrid, wherein the method comprises the following steps: presetting a mapping relation; determining the actual operation state of the microgrid based on the actual operation parameters acquired by the operation data monitoring equipment; and under the actual operation state of the microgrid, acquiring a target state adjusting strategy matched with the corresponding set equipment based on the mapping relation and the actual operation parameters so as to carry out adjustment control. The method comprises the steps that monitoring equipment capable of monitoring whether a microgrid is in a grid-connected state or an off-grid state is arranged on each source load storage equipment in the microgrid at a user side; based on the pre-established mapping relation, the voltage of each 'source load storage' device and the like, a state adjusting strategy matched with the mapping relation is called in time so as to carry out timely and targeted optimization adjustment on controllable resources in the user-side microgrid, and the safety, reliability and economy of microgrid operation are effectively guaranteed.
Description
Technical Field
The invention relates to the technical field of micro-grids, in particular to an operation control method and system of a micro-grid, electronic equipment and a storage medium.
Background
In recent years, distributed clean energy (distributed photovoltaic, distributed fans, combined cooling heating and power gas turbines and the like) is vigorously promoted in all countries in the world. The micro-grid is developed, the on-site balance of energy is realized through the coordination and optimization operation management of the source grid load storage in a small range, and the method is a basic mode for meeting the access requirement of large-scale distributed clean energy. The "source" in the user-side microgrid refers to a DG (Distributed Generation) in the microgrid, such as Distributed photovoltaic power Generation; the 'network' in the user-side microgrid refers to a power distribution network of a power grid company, and the microgrid is electrically connected with the microgrid through a Point of Common Coupling (PCC); the load in the user-side microgrid refers to controllable load in the microgrid, such as a lighting device which can be cut off or a cooling device which can adjust water yield and the like; the storage in the user-side microgrid is an energy storage system, and the current mainstream is the lithium iron phosphate battery energy storage system.
The user side microgrid has two basic operation modes: a grid-connected operation mode when the grid-connected point switch is turned off and an off-grid operation mode when the grid-connected point switch is turned off. The user-side microgrid has three basic functions: 1) during grid-connected operation, the consumption proportion of clean energy is improved, the energy consumption cost is reduced, and the economical efficiency of micro-grid operation is ensured through the source grid load storage coordination optimization; 2) when the grid-connected operation is carried out, if the large power grid sends out a request message of demand response, the micro-grid can respond to the message, provide demand response service and obtain service compensation of the large power grid; 3) when the isolated grid operates, the voltage stability and the frequency stability are maintained through source load storage coordination optimization, and the operation safety of the micro-grid is ensured.
To implement the above three basic functions, the existing coordination and optimization method for "source network load storage" in the user-side Microgrid is based on an ICT (Information Communication Technology) facility, that is, an MGCC (micro grid Control Center) or a set of EMS (Energy Management System, Energy Management software) is installed in the user-side Microgrid, and an expensive ICT facility for monitoring data in real time is built. MGCC or EMS realizes communication with the source network load storage equipment through ICT facility, and collects the running state data of the source network load storage equipment; executing an analysis model and an algorithm, and judging the operation mode (grid connection or off-grid) of the micro-grid; and according to the judgment result, issuing a control command to the source load storage equipment through an ICT (information and communication technology) facility, adjusting the state of the source load storage equipment, and ensuring the operation stability and the operation economy of the micro-grid.
Then, the coordination optimization of the implementation method is completely based on the ICT facility, and if the ICT facility is interrupted and other fault conditions occur, the source grid load storage coordination optimization in the user-side microgrid cannot normally operate, and the user-side microgrid loses the stability of operation and the economy of operation. In addition, because real-time monitoring data is involved, extra capital needs to be invested in the user-side microgrid to construct an ICT facility with high cost, and therefore the construction cost, the maintenance cost and the like of the user-side microgrid are high.
Disclosure of Invention
The invention aims to overcome the defects that an operation coordination scheme of a microgrid in the prior art depends on expensive ICT facilities, the operation stability and the operation economy of the microgrid at a user side cannot be guaranteed, the investment cost is high and the like, and aims to provide an operation control method, a system, electronic equipment and a storage medium of the microgrid.
The invention solves the technical problems through the following technical scheme:
the invention provides an operation control method of a micro-grid, wherein a plurality of setting devices in the micro-grid are respectively provided with corresponding operation data monitoring devices, and the operation control method comprises the following steps:
presetting corresponding preset state adjusting strategies of different types of setting equipment under different operation states of the microgrid and different preset operation parameters and establishing corresponding mapping relations;
determining the actual operation state of the microgrid based on the actual operation parameters acquired by the operation data monitoring equipment;
and under the actual operation state of the microgrid, acquiring a target state adjusting strategy matched with the corresponding set equipment based on the mapping relation and the actual operation parameters so as to carry out adjustment control.
Preferably, the actual operation parameters include power grid voltage frequency values acquired at different time points;
the step of determining the actual operating state of the microgrid based on the actual operating parameters collected by the operating data monitoring equipment comprises:
calculating to obtain instantaneous change information of the voltage frequency of the power grid according to the voltage frequency values of the power grid acquired at different time points;
and determining the actual operation state of the micro-grid based on the instantaneous change information, wherein the actual operation state corresponds to an off-grid state or a grid-connected state.
Preferably, the setting equipment comprises distributed power generation equipment, energy storage equipment, controllable load equipment and a gas turbine.
Preferably, when the setting device is an energy storage device, the step of obtaining, in the actual operating state of the microgrid, a target state adjustment policy matched with the corresponding setting device based on the mapping relationship and the actual operating parameter includes:
when the micro-grid is in the grid-connected state, controlling the energy storage equipment to operate according to an operation mode of discharging at the valley-time charging peak;
when the microgrid is in the off-grid state, judging whether a first working voltage value of the energy storage equipment is larger than a first set threshold value or not, and if so, controlling the energy storage equipment to reduce discharge; otherwise, controlling the energy storage device to increase discharge.
Preferably, when the setting device is a controllable load device, the step of obtaining, in the actual operating state of the microgrid, a target state adjustment policy matched with the corresponding setting device based on the mapping relationship and the actual operating parameter includes:
when the microgrid is in the grid-connected state, judging whether a second working voltage value of the controllable load equipment is larger than a second set threshold value or not, and if so, controlling the controllable load equipment to be in an operating state; otherwise, controlling the controllable load equipment to exit the running state;
and when the micro-grid is in the off-grid state, controlling the controllable load equipment to exit the running state.
Preferably, when the actual operation state of the microgrid is the grid-connected state, the operation control method further includes:
judging whether the setting equipment receives auxiliary service request information sent by a power distribution network, if so, judging whether the setting equipment responds to the auxiliary service request information, if so, generating and sending response information to the power distribution network, generating a first state adjustment strategy based on the auxiliary service request information, and adjusting and controlling the setting equipment by adopting the first state adjustment strategy so as to provide auxiliary service for the power distribution network;
and if not, executing the step of obtaining the target state adjustment strategy matched with the corresponding set equipment based on the mapping relation and the actual operation parameters.
Preferably, after the step of performing regulation control on the setting device by using the first state regulation strategy to provide the auxiliary service to the power distribution network, the method further includes:
acquiring service parameters corresponding to the auxiliary service;
converting the service parameters into block chain accounting information by adopting a block chain technology, recording the block chain accounting information into a block chain account book record, and uploading the block chain accounting information to a block chain platform for issuing;
and the block chain accounting information is service bill information corresponding to the auxiliary service provided to the power distribution network side.
The invention also provides an operation control system of the microgrid, wherein a plurality of setting devices in the microgrid are respectively provided with corresponding operation data monitoring devices, and the operation control system comprises:
the mapping relation presetting module is used for presetting corresponding preset state adjusting strategies when the setting equipment of different types is in different preset operation states and different preset operation parameters, and establishing corresponding mapping relations;
the actual operation information acquisition module is used for acquiring actual operation parameters corresponding to the microgrid by adopting the operation data monitoring equipment;
the actual operation state determining module is used for determining the actual operation state of the microgrid based on the actual operation parameters;
and the operation control module is used for acquiring a target state adjusting strategy matched with the corresponding setting equipment based on the mapping relation and the actual operation parameters in the actual operation state of the microgrid so as to carry out adjustment control.
The invention also provides an electronic device, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor realizes the operation control method of the microgrid when executing the computer program.
The present invention also provides a computer-readable storage medium on which a computer program is stored, the computer program, when executed by a processor, implementing the operation control method of the microgrid described above.
On the basis of the common general knowledge in the field, the preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.
The positive progress effects of the invention are as follows:
in the invention, each 'source load storage' device in a user-side microgrid is provided with an operation data monitoring device capable of sensing instantaneous change of voltage frequency of the microgrid so as to monitor and judge whether the microgrid is in a grid-connected state or an off-grid state in real time; based on a mapping relation established in advance and according to working parameters such as voltage of each 'source load storage' device, a state adjusting strategy matched with the mapping relation is called in time so as to carry out timely and targeted optimization adjustment on controllable resources such as 'source network load storage' in a user-side microgrid, and therefore the safety, reliability and economy of microgrid operation are effectively guaranteed; in addition, when the micro-grid is in a grid-connected state, if auxiliary service request information sent by the power distribution network is received and the request is determined to be responded, a state adjustment strategy matched with the auxiliary service is generated to adjust corresponding equipment so as to meet the purpose of providing the auxiliary service for the power distribution network; the service parameters are processed by adopting a block chain technology to generate unchangeable accounting information, so that the stability, the operation economy and the reliability of the operation of the user-side micro-grid can be still effectively realized under the basic condition based on the low-cost ICT facility.
Drawings
Fig. 1 is a schematic diagram of an architecture of a microgrid according to embodiment 1 of the present invention.
Fig. 2 is a flowchart of an operation control method of the microgrid according to embodiment 1 of the present invention.
Fig. 3 is a flowchart of an operation control method of the microgrid according to embodiment 2 of the present invention.
Fig. 4 is a block diagram of an operation control system of the microgrid according to embodiment 3 of the present invention.
Fig. 5 is a block diagram of an operation control system of the microgrid according to embodiment 4 of the present invention.
Fig. 6 is a schematic structural diagram of an electronic device for implementing an operation control method for a microgrid according to embodiment 5 of the present invention.
Detailed Description
The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.
Example 1
The application scenario of this embodiment is to control the operation of the micro grid on the user side, where the user side corresponds to an industrial and commercial park, a hospital, a supermarket, and the like.
The method comprises the steps that adjustable 'source load storage' equipment in a microgrid at a user side is predetermined to serve as setting equipment, corresponding operation data monitoring equipment is respectively installed on different 'source load storage' equipment, and the instantaneous change situation of the voltage frequency of the microgrid at the user side is sensed.
As shown in fig. 1, the "source charge storage" device includes, but is not limited to, a distributed power generation device (such as a distributed photovoltaic power generation device), an energy storage device (such as a lithium iron phosphate battery energy storage system), a controllable load device (such as a disconnectable lighting device or a chiller device capable of adjusting water yield), and a gas turbine, which are schematic structural diagrams corresponding to the microgrid of this embodiment.
The operation data monitoring device (corresponding to the "sensing + calculating + controlling module" in fig. 1) may be composed of a high-speed data acquisition sensor, a data processor, and the like, so as to achieve the functions of sensing, acquiring, calculating, controlling, and the like of the working parameters of the corresponding device. Of course, the operation data monitoring device may also be formed by other hardware devices as long as the functions of data acquisition, processing and the like can be achieved.
As shown in fig. 2, the operation control method of the microgrid according to the present embodiment includes:
s101, presetting corresponding preset state adjusting strategies and establishing corresponding mapping relations when different types of setting equipment are in different preset operation parameters under different operation states of the microgrid;
specifically, before the construction of a micro-grid at a user side is completed and the micro-grid is put on line and put into operation, a rule that each 'source load storage' device in the micro-grid performs self-state regulation by sensing voltage frequency under three operation modes of demand response during grid connection, grid disconnection and grid connection is preset according to a power distribution network (or a large power grid), system parameters and device parameters of the micro-grid and the like; by presetting the autonomous state regulation rule, different setting devices can call adaptive regulation strategies in time to carry out reasonable operation state regulation in the actual operation process of the microgrid, and the timeliness, the rationality and the reliability of operation control of the microgrid are effectively guaranteed.
S102, determining an actual operation state of the micro-grid based on actual operation parameters acquired by operation data monitoring equipment;
and S103, under the actual operation state of the microgrid, acquiring a target state adjusting strategy matched with the corresponding set equipment based on the mapping relation and the actual operation parameters so as to perform adjustment control.
The operation control method of the microgrid is suitable for the alternating current-direct current hybrid microgrid.
In the embodiment, each 'source load storage' device in a user-side microgrid is provided with an operation data monitoring device capable of sensing instantaneous change of voltage frequency of the microgrid so as to monitor and judge whether the microgrid is in a grid-connected state or an off-grid state in real time; based on the pre-established mapping relation and according to the working parameters such as the voltage of each 'source load storage' device, a state adjusting strategy matched with the mapping relation is called in time so as to carry out timely and targeted optimization adjustment on controllable resources such as 'source network load storage' in the user-side microgrid, and the safety, reliability and economy of microgrid operation are effectively guaranteed.
Example 2
As shown in fig. 3, the operation control method of the microgrid of the present embodiment is a further improvement of embodiment 1, specifically:
in an embodiment, the actual operating parameters include values of grid voltage frequencies acquired at different points in time.
Step S102 includes:
s1021, calculating to obtain instantaneous change information of the voltage frequency of the power grid according to the voltage frequency values of the power grid collected at different time points;
s1022, determining the actual running state of the microgrid based on the instantaneous change information, wherein the actual running state corresponds to an off-grid state or a grid-connected state.
Specifically, the instantaneous change information corresponds to a microgrid voltage frequency transient process caused by the opening and closing action of a grid-connected point switch between the microgrid and the power distribution network, and when the instantaneous change corresponds to the opening and closing operation, the microgrid is determined to be in an off-grid state; and when the transient change corresponds to the closing operation, determining that the microgrid is in a grid-connected state.
It should be noted that, in the microgrid, the instantaneous change information of the grid voltage frequency values on different setting devices at the same time is the same, so that the instantaneous change information can be calculated and obtained based on the grid voltage frequency values acquired at different time points on any one setting device, and the data acquired by a plurality of setting devices does not need to be repeatedly calculated to finally determine the operating state of the microgrid, so that the data calculation amount can be effectively reduced, and the operating control efficiency is also ensured to a certain extent.
In an implementation, when the setting device is an energy storage device, the step S103 includes:
when the micro-grid is in a grid-connected state, controlling the energy storage equipment to operate according to an operation mode of discharging at the valley time and the peak time of charging;
when the microgrid is in an off-grid state, judging whether a first working voltage value of the energy storage equipment is greater than a first set threshold value, and if so, controlling the energy storage equipment to reduce discharge; otherwise, the energy storage device is controlled to increase the discharge.
In an implementation, when the setting device is a controllable load device, the step S103 includes:
when the microgrid is in a grid-connected state, judging whether a second working voltage value of the controllable load equipment is greater than a second set threshold value, and if so, controlling the controllable load equipment to be in an operating state; otherwise, controlling the controllable load equipment to exit the running state;
and when the microgrid is in an off-grid state, controlling the controllable load equipment to exit the running state.
Namely, when the micro-grid is in a grid-connected state, each 'source load storage' device automatically matches and executes a 'source grid load storage' coordination optimization rule; when the microgrid is in an off-grid state, each 'source load storage' device automatically matches and executes a 'source load storage' coordination optimization rule, so that the microgrid can ensure the safety, reliability and economy of operation in different operation states.
In an implementation manner, when the actual operating state of the microgrid is a grid-connected state, the method further includes, after step S102:
s104, judging whether the setting equipment receives auxiliary service request information sent by the power distribution network, and if so, executing a step S105; if not, executing step S103;
s105, judging whether the set equipment responds to the auxiliary service request information, and if so, executing a step S106;
s106, generating and sending response information to the power distribution network, generating a first state adjustment strategy based on the auxiliary service request information, and adjusting and controlling the set equipment by adopting the first state adjustment strategy so as to provide auxiliary service for the power distribution network; if not, step S103 is executed.
In an implementation scheme, in step S106, the adjusting and controlling the setting device by using the first state adjusting policy is performed to provide the auxiliary service to the power distribution network, and then the method further includes:
s107, acquiring service parameters corresponding to the auxiliary service;
s108, converting the service parameters into block chain accounting information by adopting a block chain technology, recording the block chain accounting information into a block chain account book record, and uploading the block chain accounting information to a block chain platform for issuing;
referring to fig. 1, the block chain accounting information may be reported to the block chain platform through the low-cost network by the operation data monitoring device.
And the block chain accounting information is service bill information corresponding to the auxiliary service provided for the power distribution network side. The block chain accounting information is irreorably modified and corresponds to information such as time points, service energy, duration time, effect data reflected in the aspect of voltage frequency stability and the like of source network load storage coordinated optimization; and uploading the block chain account book records to a block chain platform and obtaining evidence release through a low-cost ICT facility, and finally obtaining the expense compensation of the power distribution network for the auxiliary service. The block chain technology is applied to the electric power auxiliary service or the distributed electric power transaction, so that the cost of the electric power auxiliary service or the distributed electric power transaction is effectively reduced, the consumption proportion of clean energy is improved, and the supporting capability of the micro-grid to the large power grid is improved.
Meanwhile, under the condition that the ICT facility is interrupted or no ICT facility (or other high-cost MGCC facilities and EMS facilities) is installed, the overall coordination and optimization of 'source network load storage' in the user side microgrid can still be realized, the construction cost of the user side microgrid is effectively saved, and the flexibility and the reliability of the operation control of the microgrid are improved.
In the operation process of the user-side microgrid, the operation control logic needs to be continuously and repeatedly executed so as to ensure the overall operation control effect of the user-side microgrid.
In the embodiment, each 'source load storage' device in a user-side microgrid is provided with an operation data monitoring device capable of sensing instantaneous change of voltage frequency of the microgrid so as to monitor and judge whether the microgrid is in a grid-connected state or an off-grid state in real time; based on a mapping relation established in advance and according to working parameters such as voltage of each 'source load storage' device, a state adjusting strategy matched with the mapping relation is called in time so as to carry out timely and targeted optimization adjustment on controllable resources such as 'source network load storage' in a user-side microgrid, and therefore the safety, reliability and economy of microgrid operation are effectively guaranteed; in addition, when the micro-grid is in a grid-connected state, if auxiliary service request information sent by the power distribution network is received and the request is determined to be responded, a state adjustment strategy matched with the auxiliary service is generated to adjust corresponding equipment so as to meet the purpose of providing the auxiliary service for the power distribution network; the service parameters are processed by adopting a block chain technology to generate unchangeable accounting information, so that the stability, the operation economy and the reliability of the operation of the user-side micro-grid can be still effectively realized under the basic condition based on the low-cost ICT facility.
Example 3
The application scenario of this embodiment is to control the operation of the micro grid on the user side, where the user side corresponds to an industrial and commercial park, a hospital, a supermarket, and the like.
The method comprises the steps that adjustable 'source load storage' equipment in a microgrid at a user side is predetermined to serve as setting equipment, corresponding operation data monitoring equipment is respectively installed on different 'source load storage' equipment, and the instantaneous change situation of the voltage frequency of the microgrid at the user side is sensed.
As shown in fig. 1, the schematic diagram is an architecture diagram corresponding to the microgrid in this embodiment, and the "source load storage" device includes, but is not limited to, a distributed power generation device (such as a distributed photovoltaic power generation device), an energy storage device (such as a lithium iron phosphate battery energy storage system), a controllable load device (such as a disconnectable lighting device or a water output adjustable cooling device), and a gas turbine.
The operation data monitoring device (corresponding to the "sensing + calculating + controlling module" in fig. 1) may be composed of a high-speed data acquisition sensor, a data processor, and the like, so as to achieve the functions of sensing, acquiring, calculating, controlling, and the like of the working parameters of the corresponding device. Of course, the operation data monitoring device may also be configured by other hardware devices as long as the functions of data acquisition, processing and the like are realized.
As shown in fig. 4, the operation control system of the microgrid of the present embodiment includes:
the mapping relation presetting module 1 is used for presetting corresponding preset state adjusting strategies when different types of setting equipment are in different operation states and different preset operation parameters, and establishing corresponding mapping relations;
specifically, before the construction of a micro-grid at a user side is completed and the micro-grid is put on line and put into operation, a rule that each 'source load storage' device in the micro-grid performs self-state regulation by sensing voltage frequency under three operation modes of demand response during grid connection, grid disconnection and grid connection is preset according to a power distribution network (or a large power grid), system parameters and device parameters of the micro-grid and the like; by presetting the autonomous state regulation rule, different setting devices can call adaptive regulation strategies in time to carry out reasonable operation state regulation in the actual operation process of the microgrid, and the timeliness, the rationality and the reliability of operation control of the microgrid are effectively guaranteed.
The actual operation information acquisition module 2 is used for acquiring actual operation parameters corresponding to the microgrid by adopting operation data monitoring equipment;
the actual operation state determining module 3 is used for determining the actual operation state of the microgrid based on the actual operation parameters;
and the operation control module 4 is used for acquiring a target state adjustment strategy matched with the corresponding set equipment based on the mapping relation and the actual operation parameters in the actual operation state of the microgrid so as to perform adjustment control.
The operation control method of the microgrid of the embodiment is suitable for an alternating current-direct current hybrid microgrid.
In the embodiment, each 'source load storage' device in a user-side microgrid is provided with an operation data monitoring device capable of sensing instantaneous change of voltage frequency of the microgrid so as to monitor and judge whether the microgrid is in a grid-connected state or an off-grid state in real time; based on the pre-established mapping relation and according to the working parameters such as the voltage of each 'source load storage' device, a state adjusting strategy matched with the mapping relation is called in time so as to carry out timely and targeted optimization adjustment on controllable resources such as 'source network load storage' in the user-side microgrid, and the safety, reliability and economy of microgrid operation are effectively guaranteed.
Example 4
As shown in fig. 5, the operation control system of the microgrid of the present embodiment is a further improvement of embodiment 3, specifically:
in an embodiment, the actual operating parameters include values of grid voltage frequencies acquired at different points in time.
The actual operation state determination module 3 includes:
the instantaneous change information calculation unit 5 is used for calculating instantaneous change information of the voltage frequency of the power grid according to the voltage frequency values of the power grid acquired at different time points;
specifically, the instantaneous change information corresponds to a microgrid voltage frequency transient process caused by the opening and closing action of a grid-connected point switch between the microgrid and the power distribution network, and when the instantaneous change corresponds to the opening and closing operation, the microgrid is determined to be in an off-grid state; and when the transient change corresponds to the closing operation, determining that the microgrid is in a grid-connected state.
It should be noted that, in the microgrid, the instantaneous change information of the grid voltage frequency values on different setting devices at the same time is the same, so that the instantaneous change information can be calculated and obtained based on the grid voltage frequency values acquired at different time points on any one setting device, and the data acquired by a plurality of setting devices does not need to be repeatedly calculated to finally determine the operating state of the microgrid, so that the data calculation amount can be effectively reduced, and the operating control efficiency is also ensured to a certain extent.
And the actual operation state determining unit 6 is used for determining the actual operation state of the microgrid based on the instantaneous change information, wherein the actual operation state corresponds to an off-grid state or a grid-connected state.
In an implementable scheme, when the set device is an energy storage device, the operation control module 4 is configured to control the energy storage device to operate according to an operation mode of discharging at a valley time charging peak when the microgrid is in a grid-connected state;
when the microgrid is in an off-grid state, judging whether a first working voltage value of the energy storage equipment is greater than a first set threshold value, and if so, controlling the energy storage equipment to reduce discharge; otherwise, the energy storage device is controlled to increase the discharge.
In an implementable scheme, when the setting device is a controllable load device, the operation control module 4 is configured to, when the microgrid is in a grid-connected state, determine whether a second working voltage value of the controllable load device is greater than a second set threshold, and if so, control the controllable load device to be in an operation state; otherwise, controlling the controllable load equipment to exit the running state;
and when the microgrid is in an off-grid state, controlling the controllable load equipment to exit the running state.
Namely, when the micro-grid is in a grid-connected state, each 'source load storage' device automatically matches and executes a 'source grid load storage' coordination optimization rule; when the microgrid is in an off-grid state, each 'source load storage' device automatically matches and executes a 'source load storage' coordination optimization rule, so that the microgrid can ensure the safety, reliability and economy of operation in different operation states.
In an implementable aspect, when the actual operating state of the microgrid is a grid-connected state, the implemented operation control system further includes:
the first judging module 7 is used for judging whether the setting equipment receives the auxiliary service request information sent by the power distribution network, and if the setting equipment receives the auxiliary service request information, the second judging module 8 is called;
the second judging module 8 is configured to judge whether the setting device responds to the auxiliary service request information, if so, generate and send response information to the power distribution network, generate a first state adjustment policy based on the auxiliary service request information, and perform adjustment control on the setting device by using the first state adjustment policy to provide an auxiliary service to the power distribution network;
if not, the operation control module 4 is called.
In an implementable aspect, the operation control system of the present implementation further includes:
a service parameter obtaining module 9, configured to obtain a service parameter corresponding to the auxiliary service;
the record information acquisition module 10 is configured to convert the service parameters into block chain accounting information by using a block chain technology, record the block chain accounting information into a block chain account book record, and upload the block chain accounting information to a block chain platform for release;
referring to fig. 1, the block chain accounting information may be reported to the block chain platform through the low-cost network by the operation data monitoring device.
And the block chain accounting information is service bill information corresponding to the auxiliary service provided for the power distribution network side.
The block chain accounting information is irrevocably modified and corresponds to information such as a time point, service energy, duration time, effect data reflected in the aspect of voltage frequency stability and the like of source network load storage coordination optimization; and uploading the block chain account book records to a block chain platform and obtaining evidence release through a low-cost ICT facility, and finally obtaining the expense compensation of the power distribution network for the auxiliary service. The block chain technology is applied to the electric power auxiliary service or the distributed electric power transaction, so that the cost of the electric power auxiliary service or the distributed electric power transaction is effectively reduced, the consumption proportion of clean energy is improved, and the supporting capability of the micro-grid to the large power grid is improved.
Meanwhile, under the condition that the ICT facility is interrupted or no ICT facility (or other high-cost MGCC facilities and EMS facilities) is installed, the overall coordination and optimization of 'source network load storage' in the user side microgrid can still be realized, the construction cost of the user side microgrid is effectively saved, and the flexibility and the reliability of the operation control of the microgrid are improved.
In the operation process of the user-side microgrid, the operation control logic needs to be continuously and repeatedly executed so as to ensure the overall operation control effect of the user-side microgrid.
In the embodiment, each 'source load storage' device in a user-side microgrid is provided with an operation data monitoring device capable of sensing instantaneous change of voltage frequency of the microgrid so as to monitor and judge whether the microgrid is in a grid-connected state or an off-grid state in real time; based on a mapping relation established in advance and according to working parameters such as voltage of each 'source load storage' device, a state adjusting strategy matched with the mapping relation is called in time so as to carry out timely and targeted optimization adjustment on controllable resources such as 'source network load storage' in a user-side microgrid, and therefore the safety, reliability and economy of microgrid operation are effectively guaranteed; in addition, when the micro-grid is in a grid-connected state, if auxiliary service request information sent by the power distribution network is received and the request is determined to be responded, a state adjusting strategy matched with the auxiliary service is generated to adjust corresponding equipment so as to fulfill the aim of providing the auxiliary service for the power distribution network; the service parameters are processed by adopting a block chain technology to generate unchangeable accounting information, so that the stability, the operation economy and the reliability of the operation of the user-side micro-grid can be still effectively realized under the basic condition based on the low-cost ICT facility.
Example 5
Fig. 6 is a schematic structural diagram of an electronic device according to embodiment 5 of the present invention. The electronic device includes a memory, a processor, and a computer program stored on the memory and executable on the processor, and the processor implements the operation control method of the microgrid in embodiment 1 or 2 when executing the program. The electronic device 30 shown in fig. 6 is only an example, and should not bring any limitation to the functions and the scope of use of the embodiment of the present invention.
As shown in FIG. 6, the electronic device 30 may take the form of a general purpose computing device, which may be a server device, for example. The components of the electronic device 30 may include, but are not limited to: the at least one processor 31, the at least one memory 32, and a bus 33 connecting the various system components (including the memory 32 and the processor 31).
The bus 33 includes a data bus, an address bus, and a control bus.
The memory 32 may include volatile memory, such as Random Access Memory (RAM)321 and/or cache memory 322, and may further include Read Only Memory (ROM) 323.
The processor 31 executes various functional applications and data processing, such as the operation control method of the microgrid in embodiment 1 or 2 of the present invention, by executing the computer program stored in the memory 32.
The electronic device 30 may also communicate with one or more external devices 34 (e.g., a keyboard, a pointing device, etc.). Such communication may be through an input/output (I/O) interface 35. Also, model-generating device 30 may also communicate with one or more networks (e.g., a Local Area Network (LAN), a Wide Area Network (WAN), and/or a public network, such as the Internet) via network adapter 36. As shown in FIG. 6, network adapter 36 communicates with the other modules of model-generating device 30 via bus 33. It should be understood that although not shown in the figures, other hardware and/or software modules may be used in conjunction with the model-generating device 30, including but not limited to: microcode, device drivers, redundant processors, external disk drive arrays, RAID (disk array) systems, tape drives, and data backup storage systems, etc.
It should be noted that although in the above detailed description several units/modules or sub-units/modules of the electronic device are mentioned, such a division is merely exemplary and not mandatory. Indeed, the features and functionality of two or more of the units/modules described above may be embodied in one unit/module according to embodiments of the invention. Conversely, the features and functions of one unit/module described above may be further divided into embodiments by a plurality of units/modules.
Example 6
The present embodiment provides a computer-readable storage medium on which a computer program is stored, the program implementing the steps in the operation control method of the microgrid in embodiment 1 or 2 when executed by a processor.
More specific examples, among others, that the readable storage medium may employ may include, but are not limited to: a portable disk, a hard disk, random access memory, read only memory, erasable programmable read only memory, optical storage device, magnetic storage device, or any suitable combination of the foregoing.
In a possible embodiment, the invention can also be implemented in the form of a program product comprising program code for causing a terminal device to carry out the steps of the method for controlling the operation of a microgrid according to embodiment 1 or 2 when the program product is run on the terminal device.
Where program code for carrying out the invention is written in any combination of one or more programming languages, the program code may execute entirely on the user device, partly on the user device, as a stand-alone software package, partly on the user device and partly on a remote device or entirely on the remote device.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.
Claims (10)
1. An operation control method of a microgrid is characterized in that a plurality of setting devices in the microgrid are respectively provided with corresponding operation data monitoring devices, and the operation control method comprises the following steps:
presetting corresponding preset state adjusting strategies of different types of setting equipment under different operation states of the microgrid and different preset operation parameters and establishing corresponding mapping relations;
determining the actual operation state of the microgrid based on the actual operation parameters acquired by the operation data monitoring equipment;
and under the actual operation state of the microgrid, acquiring a target state adjusting strategy matched with the corresponding set equipment based on the mapping relation and the actual operation parameters so as to carry out adjustment control.
2. The operation control method of the microgrid according to claim 1, characterized in that the actual operation parameters comprise grid voltage frequency values acquired at different points in time;
the step of determining the actual operation state of the microgrid based on the actual operation parameters acquired by the operation data monitoring equipment comprises the following steps:
calculating to obtain instantaneous change information of the voltage frequency of the power grid according to the voltage frequency values of the power grid acquired at different time points;
and determining the actual operation state of the microgrid based on the instantaneous change information, wherein the actual operation state corresponds to an off-grid state or a grid-connected state.
3. The operation control method of the microgrid according to claim 2, wherein the setting equipment comprises distributed power generation equipment, energy storage equipment, controllable load equipment, and a gas turbine.
4. The operation control method of the microgrid according to claim 3, wherein when the setting equipment is an energy storage equipment, the step of obtaining a target state adjustment strategy matched with the corresponding setting equipment based on the mapping relation and the actual operation parameters in the actual operation state of the microgrid comprises:
when the micro-grid is in the grid-connected state, controlling the energy storage equipment to operate according to an operation mode of discharging at the valley-time charging peak;
when the microgrid is in the off-grid state, judging whether a first working voltage value of the energy storage equipment is larger than a first set threshold value or not, and if so, controlling the energy storage equipment to reduce discharge; otherwise, controlling the energy storage device to increase discharge.
5. The operation control method of the microgrid according to claim 3, wherein when the setting devices are controllable load devices, the step of acquiring a target state adjustment strategy matched with the corresponding setting devices based on the mapping relation and the actual operation parameters in the actual operation state of the microgrid comprises:
when the microgrid is in the grid-connected state, judging whether a second working voltage value of the controllable load equipment is larger than a second set threshold value or not, and if so, controlling the controllable load equipment to be in an operating state; otherwise, controlling the controllable load equipment to exit the running state;
and when the micro-grid is in the off-grid state, controlling the controllable load equipment to exit the running state.
6. The operation control method of the microgrid according to any of claims 2 to 5, characterized in that when the actual operation state of the microgrid is the grid-connected state, the operation control method further comprises:
judging whether the setting equipment receives auxiliary service request information sent by a power distribution network, if so, judging whether the setting equipment responds to the auxiliary service request information, if so, generating and sending response information to the power distribution network, generating a first state adjustment strategy based on the auxiliary service request information, and adjusting and controlling the setting equipment by adopting the first state adjustment strategy so as to provide auxiliary service for the power distribution network;
and if not, executing the step of obtaining the target state adjustment strategy matched with the corresponding set equipment based on the mapping relation and the actual operation parameters.
7. The method for controlling the operation of the microgrid according to claim 6, wherein the step of regulating and controlling the setting device by using the first state regulation strategy to provide auxiliary services to the power distribution grid further comprises the following steps:
acquiring service parameters corresponding to the auxiliary service;
converting the service parameters into block chain accounting information by adopting a block chain technology, recording the block chain accounting information into a block chain account book record, and uploading the block chain accounting information to a block chain platform for issuing;
and the block chain accounting information is service bill information corresponding to the auxiliary service provided to the power distribution network side.
8. The utility model provides an operation control system of little electric wire netting, its characterized in that, corresponding operation data monitoring facilities are installed respectively to a plurality of settlement equipment punishment in little electric wire netting, operation control system includes:
the mapping relation presetting module is used for presetting corresponding preset state adjusting strategies when the setting equipment of different types is in different preset operation states and different preset operation parameters, and establishing corresponding mapping relations;
the actual operation information acquisition module is used for acquiring actual operation parameters corresponding to the microgrid by adopting the operation data monitoring equipment;
the actual operation state determining module is used for determining the actual operation state of the microgrid based on the actual operation parameters;
and the operation control module is used for acquiring a target state adjusting strategy matched with the corresponding setting equipment based on the mapping relation and the actual operation parameters in the actual operation state of the microgrid so as to carry out adjustment control.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the operation control method of the microgrid according to any one of claims 1 to 7 when executing the computer program.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, implements an operation control method of a microgrid according to any one of claims 1 to 7.
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