CN115483694A - Electric power energy-saving dispatching system based on distributed power grid data - Google Patents
Electric power energy-saving dispatching system based on distributed power grid data Download PDFInfo
- Publication number
- CN115483694A CN115483694A CN202211304309.0A CN202211304309A CN115483694A CN 115483694 A CN115483694 A CN 115483694A CN 202211304309 A CN202211304309 A CN 202211304309A CN 115483694 A CN115483694 A CN 115483694A
- Authority
- CN
- China
- Prior art keywords
- power
- energy
- power supply
- electrolytic cell
- load
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J15/00—Systems for storing electric energy
- H02J15/008—Systems for storing electric energy using hydrogen as energy vector
-
- 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
- H02J3/003—Load forecast, e.g. methods or systems for forecasting future load demand
-
- 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
- H02J3/004—Generation forecast, e.g. methods or systems for forecasting future energy generation
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
- H02J2300/30—The power source being a fuel cell
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Fuel Cell (AREA)
Abstract
The invention relates to the technical field of distributed power grids, and particularly discloses an electric power energy-saving dispatching system based on distributed power grid data, which comprises a new energy power supply, an energy storage device, a hydrogen fuel cell and a power supply; the energy storage device comprises a storage battery pack and an electrolytic cell group; the system further comprises: the new energy electric energy prediction module is used for predicting the power supply power of the new energy power supply; the power load prediction module is used for predicting the power load of the power supply area; the scheduling module is used for acquiring an energy storage strategy of the storage battery pack and the electrolytic cell group according to the prediction result of the new energy electric energy prediction module and the prediction result of the electric load prediction module; when the energy storage power can not meet the requirement of the electrolytic cell group, the energy can be stored by the storage battery pack, so that the electrolytic cell group is kept at the optimal power, and the energy conservation and the stability of system energy storage are realized.
Description
Technical Field
The invention relates to the technical field of distributed power grids, in particular to an energy-saving power dispatching system based on distributed power grid data.
Background
The distributed power supply is realized by arranging a small-scale power generation system near a user and supplying power through an internal combustion engine of liquid or gas fuel, a micro gas turbine, fuel cells for various projects and a new energy power supply, so that the power stations can operate independently; the power supply mode is suitable for remote areas or distributed users unsuitable for laying power grids, does not need remote power transmission and distribution equipment, obviously reduces power transmission loss, and is safe and reliable to operate.
Because the power generation technology of fossil energy is more mature and the efficiency is higher, the existing distributed power supply mode mainly takes the power generation technology of fossil energy as the main point; with the rapid development of new energy technology and the application of various new energy power supplies such as photovoltaic power generation, wind power generation, methane power generation and the like, a power supply mode of distributed power supply with single traditional fossil energy is changed.
Meanwhile, because the new energy is easily influenced by environmental factors, energy storage adjustment needs to be carried out on the energy, and stable operation of the energy is ensured; the traditional energy storage mode is mainly adjusted through a storage battery, and with the development of a hydrogen energy storage technology and the improvement of a hydrogen fuel cell technology, the hydrogen production and energy storage mode is carried out through an electrolytic water tank, so that the energy storage and adjustment process can be realized, and the influence on the environment in the preparation process is small; however, the electrolytic water tank can stably operate only under the condition that the minimum working power of the electrolytic water tank is met, and the low power input cannot realize the waste of electric energy caused by the hydrogen production process and is easy to influence the service life of the electrolytic water tank; meanwhile, hydrogen production in the electrolytic water tank is a continuous process, so that the service life of the electrolytic water tank is reduced and electric energy is wasted due to repeated opening and closing of the electrolytic water tank.
Disclosure of Invention
The invention aims to provide an electric power energy-saving dispatching system based on distributed power grid data, and the electric power energy-saving dispatching system based on distributed power grid data solves the following technical problems:
how to realize the energy conservation and the stability of the system energy storage.
The purpose of the invention can be realized by the following technical scheme:
the electric power energy-saving dispatching system based on the distributed power grid data comprises a new energy power supply, an energy storage device, a hydrogen fuel cell and a power supply; the energy storage device comprises a storage battery pack and an electrolytic cell group; the system further comprises:
the new energy electric energy prediction module is used for predicting the power supply power of the new energy power supply;
the power load prediction module is used for predicting the power load of the power supply area;
and the scheduling module is used for acquiring the energy storage strategies of the storage battery pack and the electrolytic cell pack according to the prediction result of the new energy electric energy prediction module and the prediction result of the electric power load prediction module.
In an embodiment, the obtaining process of the energy storage policy includes:
predicting and obtaining a curve E (t) of the generated power of the new energy power supply along with time through a new energy electric energy prediction module;
predicting and acquiring a time-varying curve L (t) of the power load power of a power supply area through a power load prediction module;
when E (t) > L (t), calculating a stored electric energy curve stored (t) through stored (t) = E (t) -L (t), and connecting the stored (t) with a set value S set And (3) carrying out comparison:
when Storage (t) > S set In the process, hydrogen production and energy storage are carried out through the electrolytic cell group, and electric power regulation is carried out through the storage battery;
when Storage (t) is less than or equal to S set And meanwhile, energy is stored through the storage battery pack.
In one embodiment, when Storage (t) > S set The method comprises the following steps:
according to the formula
Calculating a recommended opening amount x of the electrolytic cell group;
by the formula
Calculating the minimum opening amount y of the electrolytic cell group;
compare x to y:
if x is larger than y, controlling the opening amount N = x of the electrolytic cell group;
if x is less than or equal to y, controlling the opening amount N = y of the electrolytic cell group;
wherein, storage (t) 1 )＝S set ，Storage(t 2 )＝S set And t is 2 ＞t 1 (ii) a q (t) is a threshold function that is linearly related to t; p max The maximum power of a single electrolytic cell group; []Is a rounded symbol.
In one embodiment, the process of opening the N electrolytic cell sets is as follows:
by the formula
Calculating the opening number z of the electrolytic cell group at the current time point, and opening the electrolytic cell group according to the z value corresponding to the time point until z = N;
wherein, P min The minimum power for stable operation of a single electrolytic cell group.
In one embodiment, when E (t) < L (t), the power supply and the hydrogen fuel cell are used for supplying power, and the power supply strategy of the power supply and the hydrogen fuel cell is adjusted according to the E (t) and the L (t) of the next period.
In one embodiment, the power supply policy is:
by the formula
Calculating a stored power supply value Q of the next period;
by the formula
Calculating a required power supply value F of the next period;
compare Q to F:
if Q is more than or equal to F, preferentially using a hydrogen fuel cell to supply power;
otherwise, simultaneously supplying power through a power supply and a hydrogen fuel cell and storing hydrogen fuel with a specific proportion;
wherein, t 3 Is the end time point of the power supply period; mu is the electric energy conversion efficiency.
In one embodiment, the specific ratio R = f r (F-Q*μ)；
Wherein f is r () A predetermined positive correlation linear function.
In one embodiment, the system further comprises a load monitoring and checking module;
the load monitoring and checking module is used for monitoring a new grid-connected load and carrying out grid-connected control according to the required power supply power, the category information, the current new energy power supply output power and the current load power of the new grid-connected load.
In one embodiment, the grid-connected control process includes:
will require a supply power P d And a set power threshold P th And (3) carrying out comparison:
if P d ＞P th Judging the power supply priority according to the category information:
if the priority is not less than the preset level, the load is connected to the grid;
if the priority is less than the preset level, judging whether grid connection is performed according to the output power of the previous new energy power supply and the current load power;
if P d ≤P th The load is connected to the grid.
The invention has the beneficial effects that:
(1) According to the invention, a proper energy storage strategy is selected according to the predicted power state, when the energy storage power cannot meet the requirement of the electrolytic cell group, the storage battery can be used for storing energy, when the energy storage power meets the requirement of the electrolytic cell group, the energy is stored through the electrolytic cell group, and meanwhile, the storage battery group is used for regulating the power of the electrolytic cell group during working, so that the electrolytic cell group is kept at the optimal power, the hydrogen production efficiency is ensured, the waste of electric energy is reduced, and the energy saving performance and the stability of the system energy storage are realized.
Drawings
The invention will be further described with reference to the accompanying drawings.
Fig. 1 is a schematic block diagram of an energy-saving power dispatching system based on distributed grid data according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, in one embodiment, an energy-saving power dispatching system based on distributed power grid data is provided, and the system includes a new energy power source, an energy storage device, a hydrogen fuel cell and a power supply source; the energy storage device comprises a storage battery pack and an electrolytic cell group; the system further comprises:
the new energy electric energy prediction module is used for predicting the power supply power of the new energy power supply;
the power load prediction module is used for predicting the power load of the power supply area;
and the scheduling module is used for acquiring the energy storage strategies of the storage battery pack and the electrolytic cell pack according to the prediction result of the new energy electric energy prediction module and the prediction result of the electric power load prediction module.
According to the technical scheme, the power supply power of the new energy power supply is predicted through the new energy electric energy prediction module, the electric load of a power supply area is predicted through the electric load prediction module, and then a proper energy storage strategy can be selected according to the predicted electric power state, and the energy storage strategy is realized through the storage battery pack and the electrolytic cell bank, so that when the energy storage power cannot meet the working condition of the electrolytic cell bank, the storage battery pack can store energy, when the energy storage power meets the working condition of the electrolytic cell bank, the energy is stored through the electrolytic cell bank, and meanwhile, the storage battery pack adjusts the power of the electrolytic cell bank during working, so that the electrolytic cell bank is kept at the optimal power, the hydrogen production efficiency is ensured, the electric energy waste is reduced, and the energy conservation and the stability of the system energy storage are realized.
In the technical scheme, the distributed power supply is realized through a new energy power supply, an energy storage device, a hydrogen fuel cell and a power supply, wherein the new energy power supply can be a photovoltaic power supply, a methane power supply, a wind power supply and the like; in the above scheme, the ac-dc conversion process is implemented by the existing converter, and is not described in detail herein.
In addition, it should be noted that the new energy electric energy prediction module predicts and statistically analyzes the power supply power according to different types of new energy, and the prediction modes of different new energy can be achieved by obtaining environmental parameters and combining the existing prediction model, for example, the photovoltaic power supply can be obtained by bringing parameters such as illumination duration, illumination intensity, environmental temperature, and longitude and latitude of the area into the analysis model, which is not described in detail herein; the prediction of the power load by the power load prediction module can be obtained by establishing a machine learning model and training data of the region as a sample, and the prediction result can be obtained by the prior art, which is not described in detail herein.
As an embodiment of the present invention, the obtaining process of the energy storage policy is:
predicting and obtaining a curve E (t) of the generated power of the new energy power supply along with time through a new energy electric energy prediction module;
predicting and acquiring a time-varying curve L (t) of the power load power of a power supply area through a power load prediction module;
when E (t) > L (t), calculating a stored electric energy curve Storage (t) by Storage (t) = E (t) -L (t), and calculating Storage (t) and a set value S set And (3) carrying out comparison:
when Storage (t) > S set In the process, hydrogen production and energy storage are carried out through the electrolytic cell group, and electric power regulation is carried out through the storage battery;
when Storage (t) is less than or equal to S set And meanwhile, energy is stored through the storage battery pack.
According to the technical scheme, by acquiring the curve E (t) of the generated power changing along with the time and the curve L (t) of the power load power changing along with the time, obviously, when E (t) > L (t), energy Storage is needed, so that the curve of the energy Storage energy is acquired through Storage (t) = E (t) -L (t), and the Storage (t) and the set value S are combined set Comparing, wherein the value S is set set Determined according to the minimum working power of a single electrolytic cell group, so that when Storage (t) > S set During the process, hydrogen production and energy Storage are carried out through the electrolytic cell group, and electric power regulation is carried out through the Storage battery pack, when Storage (t) is less than or equal to S set In time, the energy is stored through the Storage battery pack, so that the energy is stored through Storage (t) and S set And in the comparison process, the corresponding energy storage strategy can be determined, and the stable energy-saving operation of the electrolytic cell group is ensured.
In addition, S is set Determined by the lowest operating power of the individual cell groups, but not identically, S set The standard deviation is larger than the lowest working power value of a single electrolytic cell group, the standard deviation is set according to historical electric power data, and the standard deviation is smaller than the lowest working power value of the single electrolytic cell group; t is a time point.
As an embodiment of the invention, when Storage (t) > S set The method comprises the following steps:
according to the formula
Calculating a recommended opening amount x of the electrolytic cell group;
by the formula
Calculating the minimum opening amount y of the electrolytic cell group;
compare x to y:
if x is larger than y, controlling the opening amount N = x of the electrolytic cell group;
if x is less than or equal to y, controlling the opening amount N = y of the electrolytic cell group;
wherein, storage (t) 1 )＝S set ，Storage(t 2 )＝S set And t is 2 ＞t 1 (ii) a q (t) is a threshold function that is linearly related to t; p max The maximum power of a single electrolytic cell group; []Is a rounded symbol.
Through the technical scheme, the embodiment provides the method for determining the opening number judgment of the electrolytic cell, and concretely, the method is firstly carried out according to the method
Calculating recommended opening amount x of the electrolytic cell group, wherein q (t) is a threshold value function linearly related to t and is set and obtained according to historical data, so that the curve of the stored electric energy at t is obtained 1 ～t 2 Interval integration and removal of q (t) 2 )-q(t 1 ) Further acquiring a recommended opening amount x; at the same time, by the formula
Calculating the minimum opening amount y of the electrolytic cell group, wherein max (Storage (t)) represents the peak value of the stored electric energy curve, P max Is the maximum power of a single electrolytic cell set]To round the symbol, therefore by
The lowest opening amount y can be obtained, obviously, when x is larger than y, the opening amount N = x of the electrolytic cell group is controlled, and when x is smaller than or equal to y, the opening amount N = y of the electrolytic cell group is controlled; therefore, by means of the scheme, the optimal number of the electrolytic cell groups to be opened can be accurately selected, stable operation of the electrolytic cell groups is further met, and meanwhile, electric energy generated by the new energy power supply can be fully stored.
When the lowest opening amount y is determined, when a remainder exists in a calculation formula, the redundant electric energy can be stored through the storage battery pack; and fitting and obtaining the recommended opening amount x formula according to historical data.
As an embodiment of the invention, the process of opening N electrolytic cell groups is as follows:
by the formula
Calculating the opening number z of the electrolytic cell group at the current time point, and opening the electrolytic cell group according to the z value corresponding to the time point until z = N;
wherein, P min The minimum power for stable operation of a single electrolytic cell group.
Through the technical scheme, the embodiment provides the mode of opening the N electrolytic cell groups, specifically, the mode is opened through a formula
Calculating the opening number z of the electrolytic cell group at the current time point, and thus reaching S set When the electrolytic cell group is started, 1 group of electrolytic cell groups are started, and N groups of electrolytic cell groups are started in sequence along with increase of Storage (t).
In one embodiment of the invention, when E (t) < L (t), the power supply and the hydrogen fuel cell are used for supplying power, and the power supply strategies of the power supply and the hydrogen fuel cell are adjusted according to the E (t) and the L (t) of the next period.
By the technical scheme, when the E (t) is less than the L (t), the power is supplied by the power supply and the hydrogen fuel cell, wherein the hydrogen fuel cell takes the hydrogen prepared by the electrolytic cell group as the energy source, so that the power supply regulation effect of the new energy power supply is realized; meanwhile, the power supply strategy of the power supply and the hydrogen fuel cell is adjusted according to the E (t) and the L (t) of the next period, and the optimal power supply strategy is adopted according to the expectation of the next period so as to meet the requirement of providing sufficient standby power for the power supply when the power supply efficiency of the new energy power supply is low.
As an embodiment of the present invention, the power supply policy is:
by passingFormula (la)
Calculating a stored power supply value Q of the next period;
by the formula
Calculating a required power supply value F of the next period;
compare Q to F:
if Q is more than or equal to F, preferentially using a hydrogen fuel cell to supply power;
otherwise, simultaneously supplying power through the power supply and the hydrogen fuel cell and storing the hydrogen fuel with a specific proportion;
wherein, t 3 Is the end time point of the power supply period; mu is the electric energy conversion efficiency.
Through the technical scheme, the embodiment provides a power supply strategy, and particularly, the power supply strategy is realized through a formula
Calculating a stored power supply value Q of the next period; by the formula
Calculating a required power supply value F of the next period; and comparing Q with F, obviously, when Q is more than or equal to F, the electric energy which can be stored in the next period of the electricity storage interval can be fully supplied to the load in the non-point storage interval, so that the hydrogen fuel cell is preferentially used to provide the energy storage space for the next period, and when Q is less than F, the power supply and the hydrogen fuel cell are used for supplying power and storing the hydrogen fuel with a specific proportion, so that part of energy can be reserved, and sufficient standby electric energy can be supplied when the power supply is used for supplying power.
It should be noted that the stored power supply value Q and the required power supply value F only represent the power storage condition and the load required power supply condition in one power supply interval; mu is the electric energy conversion efficiency, which is determined according to the performances of the electrolytic water tank and the hydrogen fuel cell.
As an embodiment of the present invention, the specific ratioR＝f r (F-Q*μ)；
Wherein f is r () A predetermined positive correlation linear function.
With the above technical solution, the specific ratio R = f in this embodiment r (F-Q:. Mu.), wherein F r () Different proportion ranges are preset for the preset positive correlation linear function according to the size interval of the difference value of the F and the Q mu, so that the corresponding proportion can be obtained through the F-Q mu.
In addition, f is r () The setting of (c) is related to the capacity of the hydrogen storage energy in the system, and therefore the setting is determined by referring to the capacity of the hydrogen storage energy and the size of F-Q mu.
As an embodiment of the present invention, the system further includes a load monitoring and checking module;
the load monitoring and checking module is used for monitoring a new grid-connected load and carrying out grid-connected control according to the required power supply power, the category information, the current new energy power supply output power and the current load power of the new grid-connected load.
Through the technical scheme, the load monitoring and checking module is further arranged in the system, the load monitoring and checking module can monitor the new grid-connected load, grid-connected control is carried out according to the required power supply power, the category information, the current new energy power supply output power and the current load power of the new grid-connected load, therefore, through the arrangement of the load monitoring and checking module, the adverse effect on the whole system caused by the occurrence of a large load in the distributed power supply system can be avoided, and the running stability of the distributed power supply system can be further ensured.
It should be noted that the load monitoring and checking module obtains new grid-connected load power and category information through the electric energy detection device arranged in the prior art; meanwhile, the grid-connected control can be realized by a sensing switch arranged at the wiring port, and is not detailed here.
As an embodiment of the present invention, the grid-connected control process includes:
will require a supply power P d And a set power threshold P th And (3) carrying out comparison:
if P d ＞P th Judging the power supply priority according to the category information:
if the priority is not less than the preset level, the load is connected to the grid;
if the priority is less than the preset level, judging whether grid connection is performed according to the output power of the previous new energy power supply and the current load power;
if P d ≤P th The load is connected to the grid.
Through the above technical solution, this embodiment provides a grid-connected control method, specifically, first, the required power supply P is provided d And a set power threshold P th Performing comparison, if P d ＞P th If the load is larger, judging the power supply priority according to the class information, if the priority is larger than or equal to the preset level, carrying out grid connection on the load to ensure higher priority of power supply, for example, in the places such as hospitals and the like, if the priority is less than the preset level, whether grid connection is carried out or not is judged according to the output power of the previous new energy power supply and the current load power, and if P is not less than the preset level, the grid connection is carried out d ≤P th The load is smaller, so that the load is directly connected to the grid, the large load can be audited through the grid connection control method, the influence of the large load on the stability of the distributed power grid is avoided, meanwhile, the load with higher priority can be timely supplied, and the stability of the whole operation is guaranteed.
It should be noted that, in the process of determining the power supply priority according to the category information, the priority is determined by comparing the category information with the preset condition, and the preset level is also selected according to the division of the priority, which is not described in detail herein; in addition, when the priority is smaller than the preset level, whether grid connection is conducted or not is judged according to the current output power of the new energy power supply and the current load power, the judgment is conducted through comparing the difference value of the current output power of the new energy power supply and the current load power with the size of the load, obviously, when the load requirement is met and the electrolytic cell group is not affected, the load is connected to the grid, and otherwise, grid connection is not conducted.
While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention and should not be taken as limiting the scope of the invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (9)
1. The electric power energy-saving dispatching system based on the distributed power grid data is characterized by comprising a new energy power supply, an energy storage device, a hydrogen fuel cell and a power supply; the energy storage device comprises a storage battery pack and an electrolytic cell group; the system further comprises:
the new energy electric energy prediction module is used for predicting the power supply power of the new energy power supply;
the power load prediction module is used for predicting the power load of the power supply area;
and the scheduling module is used for acquiring the energy storage strategies of the storage battery pack and the electrolytic cell pack according to the prediction result of the new energy electric energy prediction module and the prediction result of the electric power load prediction module.
2. The distributed power grid data-based power energy-saving dispatching system of claim 1, wherein the energy storage strategy is obtained by:
predicting and obtaining a curve E (t) of the generated power of the new energy power supply along with time through a new energy electric energy prediction module;
predicting and obtaining a time-varying curve L (t) of the power load power of a power supply area through a power load prediction module;
when E (t) > L (t), calculating a stored electric energy curve stored (t) through stored (t) = E (t) -L (t), and connecting the stored (t) with a set value S set And (3) carrying out comparison:
when Storage (t) > S set In the process, hydrogen production and energy storage are carried out through the electrolytic cell group, and electric power regulation is carried out through the storage battery;
when Storage (t) is less than or equal to S set And meanwhile, energy is stored through the storage battery pack.
3. The distributed power grid data-based power energy-saving dispatching system of claim 2, wherein the dispatching system is characterized in thatWhen Storage (t) > S set The method comprises the following steps:
according to the formula
Calculating a recommended opening amount x of the electrolytic cell group;
by the formula
Calculating the minimum opening amount y of the electrolytic cell group;
compare x to y:
if x is larger than y, controlling the opening amount N = x of the electrolytic cell group;
if x is less than or equal to y, controlling the opening amount N = y of the electrolytic cell group;
wherein, storage (t) 1 )＝S set ，Storage(t 2 )＝S set And t is 2 ＞t 1 (ii) a q (t) is a threshold function that is linearly related to t; p max The maximum power of a single electrolytic cell group; []Is a rounded symbol.
4. The energy-saving power dispatching system based on distributed power grid data as claimed in claim 3, wherein the process of opening N electrolytic cell banks is as follows:
by the formula
Calculating the opening number z of the electrolytic cell group at the current time point, and opening the electrolytic cell group according to the z value corresponding to the time point until z = N;
wherein, P min The minimum power for stable operation of a single electrolytic cell group.
5. The distributed power grid data-based power energy-saving dispatching system of claim 2, wherein when E (t) < L (t), power is supplied by the power supply and the hydrogen fuel cell, and the power supply strategy of the power supply and the hydrogen fuel cell is adjusted according to the E (t) and the L (t) of the next period.
6. The distributed power grid data-based power energy-saving dispatching system of claim 5, wherein the power supply strategy is:
by the formula
Calculating a stored power supply value Q of the next period;
by the formula
Calculating a required power supply value F of the next period;
compare Q to F:
if Q & ltmu & gt is more than or equal to F, preferentially using a hydrogen fuel cell to supply power;
otherwise, simultaneously supplying power through a power supply and a hydrogen fuel cell and storing hydrogen fuel with a specific proportion;
wherein, t 3 Is the end time point of the power supply period; mu is the electric energy conversion efficiency.
7. The distributed power grid data-based power conservation scheduling system of claim 6 wherein the specific ratio R = f r (F-Q*μ)；
Wherein f is r () A positive correlation linear function is preset.
8. The distributed power grid data-based power energy-saving dispatching system of claim 2, further comprising a load monitoring and checking module;
the load monitoring and checking module is used for monitoring the new grid-connected load and carrying out grid-connected control according to the required power supply power, the category information, the current new energy power supply output power and the current load power of the new grid-connected load.
9. The distributed power grid data-based power energy-saving dispatching system according to claim 8, wherein the grid-connected control process comprises:
will require a supply power P d And a set power threshold P th And (3) carrying out comparison:
if P d ＞P th Judging the power supply priority according to the category information:
if the priority is not less than the preset level, the load is connected to the grid;
if the priority is less than the preset level, judging whether grid connection is performed according to the output power of the previous new energy power supply and the current load power;
if P d ≤P th The load is connected to the grid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211304309.0A CN115483694B (en) | 2022-10-24 | 2022-10-24 | Power energy-saving dispatching system based on distributed power grid data |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211304309.0A CN115483694B (en) | 2022-10-24 | 2022-10-24 | Power energy-saving dispatching system based on distributed power grid data |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115483694A true CN115483694A (en) | 2022-12-16 |
| CN115483694B CN115483694B (en) | 2023-07-04 |
Family
ID=84396690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211304309.0A Active CN115483694B (en) | 2022-10-24 | 2022-10-24 | Power energy-saving dispatching system based on distributed power grid data |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115483694B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016208694A (en) * | 2015-04-23 | 2016-12-08 | 株式会社東芝 | Energy storage system, and energy storage method |
| CN109755965A (en) * | 2019-03-20 | 2019-05-14 | 河北科技大学 | Wind light generation and hydrogen-preparing hydrogen-storing system and its progress control method |
| CN113293396A (en) * | 2021-06-22 | 2021-08-24 | 阳光电源股份有限公司 | New energy hydrogen production system and control method thereof |
| CN113644750A (en) * | 2021-08-30 | 2021-11-12 | 阳光电源股份有限公司 | Operation state control method of hydrogen production unit and related device |
| CN114725955A (en) * | 2022-04-20 | 2022-07-08 | 宝武清洁能源有限公司 | Electric power frequency modulation system and method for new energy station |
| WO2022166114A1 (en) * | 2021-02-08 | 2022-08-11 | 国网江苏省电力有限公司电力科学研究院 | Electro-hydrogen energy system scheduling method thst considers flexible hydrogen requirements |
| CN114908365A (en) * | 2022-04-26 | 2022-08-16 | 上海卓微氢科技有限公司 | Control method of off-grid photovoltaic hydrogen production system |
-
2022
- 2022-10-24 CN CN202211304309.0A patent/CN115483694B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016208694A (en) * | 2015-04-23 | 2016-12-08 | 株式会社東芝 | Energy storage system, and energy storage method |
| CN109755965A (en) * | 2019-03-20 | 2019-05-14 | 河北科技大学 | Wind light generation and hydrogen-preparing hydrogen-storing system and its progress control method |
| WO2022166114A1 (en) * | 2021-02-08 | 2022-08-11 | 国网江苏省电力有限公司电力科学研究院 | Electro-hydrogen energy system scheduling method thst considers flexible hydrogen requirements |
| CN113293396A (en) * | 2021-06-22 | 2021-08-24 | 阳光电源股份有限公司 | New energy hydrogen production system and control method thereof |
| CN113644750A (en) * | 2021-08-30 | 2021-11-12 | 阳光电源股份有限公司 | Operation state control method of hydrogen production unit and related device |
| CN114725955A (en) * | 2022-04-20 | 2022-07-08 | 宝武清洁能源有限公司 | Electric power frequency modulation system and method for new energy station |
| CN114908365A (en) * | 2022-04-26 | 2022-08-16 | 上海卓微氢科技有限公司 | Control method of off-grid photovoltaic hydrogen production system |
Non-Patent Citations (1)
| Title |
|---|
| 杨文强等: "大规模风/光互补制储氢系统协调控制策略研究", 电力电子技术 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115483694B (en) | 2023-07-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109755965B (en) | Operation control method of wind-solar power generation and hydrogen production and storage system | |
| US10026134B2 (en) | Charging and discharging scheduling method for electric vehicles in microgrid under time-of-use price | |
| CN109462253B (en) | Off-grid type alternating current and direct current hybrid micro-grid system and control method thereof | |
| KR20100061453A (en) | Apparatus, system, and method to manage the generation and use of hybrid electric power | |
| CN104716644A (en) | Renewable energy source cooling, heating and power microgrid system and control method | |
| CN108695871B (en) | Configuration method for reducing energy storage capacity requirement of island micro-grid containing power spring | |
| CN110416991B (en) | Modularized multi-terminal flexible direct-current micro-grid networking and layered control method thereof | |
| CN105406520A (en) | Economic dispatch optimization method of independent microgrid on basis of dual master control dynamic cooperation | |
| CN112332450A (en) | Little electric wire netting control device based on photovoltaic energy storage and street lamp illumination | |
| KR102503382B1 (en) | Method for power management of Energy Storage System connected renewable energy | |
| CN114678891A (en) | Comprehensive energy multi-node cooperative control system and method | |
| CN113452044B (en) | Wind power photovoltaic power grid dispatching method of hydrogen-containing and liquid metal battery hybrid energy storage system | |
| CN108011402A (en) | A kind of phosgene stores up cooling heating and power generation system of providing multiple forms of energy to complement each other | |
| CN111917137A (en) | Regulation and control method for multiple distributed energy sources in regional power grid | |
| CN115411770B (en) | Energy management method of renewable energy system | |
| CN115483694A (en) | Electric power energy-saving dispatching system based on distributed power grid data | |
| CN107591794A (en) | Active distribution network source storage capacity configuration optimizing method based on load classification | |
| CN109617183A (en) | A kind of intelligent power supply method of multiple battery systems | |
| CN115793452A (en) | Optimized control method of heat and hydrogen co-production system considering starting and stopping characteristics of multiple electrolytic tanks | |
| Arsalis et al. | Integration of a Green Hydrogen Subsystem in a Photovoltaic-Battery Nanogrid System | |
| CN114362259A (en) | Thermal power plant combined frequency modulation system containing solid oxide fuel cell and energy storage and control method thereof | |
| CN111244948A (en) | NSGA2 algorithm-based microgrid optimization scheduling method | |
| CN111786419A (en) | Regional power grid energy configuration system | |
| CN117691685B (en) | Intelligent regulation and control system for photovoltaic inverter | |
| CN112600243B (en) | Hybrid power grid power generation device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |