CN117498392A - Virtual storage battery control method and system based on hydrogen energy storage - Google Patents
Virtual storage battery control method and system based on hydrogen energy storage Download PDFInfo
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- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 234
- 239000001257 hydrogen Substances 0.000 title claims abstract description 234
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 228
- 238000004146 energy storage Methods 0.000 title claims abstract description 143
- 238000000034 method Methods 0.000 title claims abstract description 72
- 238000006243 chemical reaction Methods 0.000 claims abstract description 8
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- 230000008859 change Effects 0.000 claims description 9
- 238000012545 processing Methods 0.000 claims description 8
- 239000007789 gas Substances 0.000 claims description 7
- 150000002431 hydrogen Chemical class 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 5
- 230000002159 abnormal effect Effects 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims description 4
- 230000004044 response Effects 0.000 abstract description 6
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- 230000004048 modification Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
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- 239000000446 fuel Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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Classifications
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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
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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
- H02J15/00—Systems for storing electric 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
- H02J15/00—Systems for storing electric energy
- H02J15/008—Systems for storing electric energy using hydrogen as energy vector
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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
- H02J3/002—Flicker reduction, e.g. compensation of flicker introduced by non-linear load
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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
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
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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
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/10—Power transmission or distribution systems management focussing at grid-level, e.g. load flow analysis, node profile computation, meshed network optimisation, active network management or spinning reserve management
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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
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
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Abstract
The invention discloses a virtual storage battery control method and a system based on hydrogen energy storage, which belong to the technical field of intelligent regulation and control of new energy, and comprise the following steps: establishing a hydrogen energy storage virtual storage battery model according to the energy conversion relation between the stored hydrogen energy of the hydrogen energy storage system and the charge and discharge electric energy of the storage battery; calculating a virtual current value provided by hydrogen energy storage based on the hydrogen energy storage virtual storage battery model; and adjusting the pressure of the hydrogen storage tank of the hydrogen energy storage system to the reference pressure according to the virtual current value so as to enable the hydrogen energy storage system to participate in power balance. The invention takes the virtual current as a parameter for unified regulation and control, provides a scientific basis for unified dispatching of hydrogen energy storage and traditional energy storage by a power grid dispatching center, improves the rapidness and flexibility of system demand side response, is beneficial to improving the stability and safety of a power grid, and provides technical support for development of clean energy and application of sustainable energy.
Description
Technical Field
The invention relates to the technical field of intelligent regulation and control of new energy, in particular to a virtual storage battery control method and system based on hydrogen energy storage.
Background
With the rapid development of economy, problems of stable supply and rational utilization of energy have attracted widespread attention worldwide. The hydrogen energy is used as a new energy source, and the energy storage mode has the advantages of low carbon, environmental protection, high energy density, large energy storage scale and the like, and can be used as an important means for solving the problems of weak disturbance resistance and poor support of a novel power system if being matched with other energy storage technologies. Therefore, how to reasonably evaluate the electrical parameters of the hydrogen energy storage, so that the electrical parameters and the traditional energy storage element can be uniformly called to improve the coordination and the rapidity of the response of the energy storage side, and the key of the large-scale participation of the hydrogen energy storage in the power balance of the system is realized.
Disclosure of Invention
In order to solve the problems, the invention aims to provide a virtual storage battery control technology based on hydrogen energy storage so as to improve the response level of the energy storage side of a new energy system.
In order to achieve the technical purpose, the application provides a virtual storage battery control method based on hydrogen energy storage, which comprises the following steps:
based on the energy conversion relation between the stored hydrogen energy of the hydrogen energy storage system and the charge and discharge electric energy of the storage battery, a hydrogen energy storage virtual storage battery model is constructed by collecting the hydrogen energy stored by the hydrogen energy storage system, the in-tank pressure of the hydrogen storage tank, the volume of the hydrogen storage tank, the gas temperature, the low-level heat value of the hydrogen, the virtual energy of the virtual storage battery and the terminal voltage of the virtual storage battery, and the virtual current value provided by the hydrogen energy storage is obtained, wherein the hydrogen energy storage system consists of a synchronous generator set, a photovoltaic generator set, the hydrogen energy storage, the storage battery and an active load;
and according to the virtual current value, regulating the hydrogen energy storage pressure to the reference pressure, and controlling the virtual storage battery to enable the hydrogen energy storage to participate in power balance.
Preferably, in the process of obtaining the virtual current value provided by the hydrogen storage, the virtual current value is generated by obtaining the reference pressure in the process of adjusting the hydrogen storage based on the hydrogen storage virtual storage battery model.
Preferably, in the process of adjusting the hydrogen energy storage pressure to the reference pressure, the hydrogen energy storage pressure is controlled through the virtual current, the reference pressure is reduced when the virtual current is increased, the reference pressure is increased when the virtual current is reduced, the consistency of the electrical parameters of all the electrical devices is ensured, and the unified regulation and control of all the devices on the load-storage side is realized.
Preferably, in the process of adjusting the hydrogen storage pressure to the reference pressure, obtaining performance parameters for evaluating the configuration capacity and the running state of the virtual storage battery according to the relation between the reference pressure and the rated pressure of the hydrogen storage tank;
in the process of controlling the virtual storage battery, the change of the charge state of the virtual storage battery is monitored according to the performance parameters, the change of hydrogen energy storage is mastered, and the prediction of faults or abnormal conditions is carried out.
Preferably, in the process of obtaining the performance parameters, the performance parameters include a virtual battery state of charge, a virtual battery capacity and a power consumption, wherein the virtual battery state of charge is used for describing the current energy state of the hydrogen energy storage; obtaining the output power of the virtual storage battery according to the virtual current provided by the hydrogen energy storage, and obtaining the capacity of the virtual storage battery according to the rated pressure of the hydrogen energy storage; and obtaining the power consumption of the virtual storage battery in the operation process according to the variation of the pressure in the hydrogen storage tank in the operation process of the virtual storage battery.
Preferably, in the process of obtaining the charge state of the virtual storage battery, the charge state of the virtual storage battery is represented according to the stored energy of the virtual storage battery at the time t, the stored energy of the hydrogen storage tank under the rated pressure and the rated pressure of the hydrogen storage tank;
and the pressure of the hydrogen storage tank is characterized by monitoring the charge state of the pseudo-accumulator.
Preferably, in the process of obtaining the capacity of the virtual storage battery, obtaining the output power of the virtual storage battery according to the terminal voltage of the virtual storage battery and a virtual current value provided by hydrogen energy storage at the moment t;
based on the output power, the virtual storage battery capacity is obtained by obtaining the hydrogen energy stored by the hydrogen energy storage system.
Preferably, in the process of obtaining the power consumption, the power consumption is obtained according to the virtual current value by collecting the discharge time length of the virtual storage battery.
The invention provides a virtual storage battery control system based on hydrogen energy storage, which comprises:
the data acquisition module is used for acquiring hydrogen energy of the hydrogen energy storage system, pressure in a hydrogen storage tank, volume of the hydrogen storage tank, gas temperature, low-level heat value of hydrogen, virtual energy of a virtual storage battery and terminal voltage of the virtual storage battery as system operation data, wherein the hydrogen energy storage system consists of a synchronous generator set, a photovoltaic generator set, hydrogen energy storage, the storage battery and an active load;
the data processing module is used for constructing a hydrogen energy storage virtual storage battery model through system operation data based on the energy conversion relation between the stored hydrogen energy of the hydrogen energy storage system and the charging and discharging electric energy of the storage battery, and obtaining a virtual current value provided by the hydrogen energy storage;
and the virtual storage battery control module is used for adjusting the hydrogen energy storage pressure to the reference pressure according to the virtual current value and controlling the virtual storage battery so as to enable the hydrogen energy storage to participate in power balance.
Preferably, the data processing module is further used for generating a virtual current value by acquiring a reference pressure in the hydrogen energy storage adjusting process according to the constructed hydrogen energy storage virtual storage battery model.
The invention discloses the following technical effects:
first, the virtual storage battery model established based on hydrogen energy storage takes the pressure of a hydrogen storage tank as a control object. In the hydrogen energy storage self system, the pressure regulation and control instruction can be received and transmitted by the internal control system, and the hydrogen production rate is regulated by controlling the opening of the valve, so that the hydrogen production rate is more accurate; for the energy storage power station, the electric quantity and the power generation state of the hydrogen energy storage can be evaluated in real time, and the coordination control of various energy forms including the hydrogen energy is ensured by adjusting electric parameters.
Secondly, virtual current is used as a parameter for unified regulation, virtual storage battery capacity and virtual storage battery charge state are used as performance indexes for evaluating that hydrogen energy storage is equivalent to capacity configuration after virtual storage battery, a scientific basis is provided for unified scheduling of hydrogen energy storage and traditional energy storage by a scheduling center, and the rapidity and the flexibility of response of the energy storage side of the system are improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic flow chart of the method of the present invention;
FIG. 2 is a schematic illustration of a virtual current curve according to the present invention;
FIG. 3 is a schematic illustration of power profiles of various components before and after applying a virtual battery control strategy according to the present invention;
fig. 4 is a schematic diagram of the state of charge change curves of the elements before and after applying the virtual battery control strategy according to the present invention.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, which are generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, as provided in the accompanying drawings, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, are intended to be within the scope of the present application.
As shown in fig. 1-4, the invention provides a virtual storage battery control method based on hydrogen energy storage, which comprises the following steps:
based on the energy conversion relation between the stored hydrogen energy of the hydrogen energy storage system and the charge and discharge electric energy of the storage battery, a hydrogen energy storage virtual storage battery model is constructed by collecting the hydrogen energy stored by the hydrogen energy storage system, the in-tank pressure of the hydrogen storage tank, the volume of the hydrogen storage tank, the gas temperature, the low-level heat value of the hydrogen, the virtual energy of the virtual storage battery and the terminal voltage of the virtual storage battery, and the virtual current value provided by the hydrogen energy storage is obtained, wherein the hydrogen energy storage system consists of a synchronous generator set, a photovoltaic generator set, the hydrogen energy storage, the storage battery and an active load;
and according to the virtual current value, regulating the hydrogen energy storage pressure to the reference pressure, and controlling the virtual storage battery to enable the hydrogen energy storage to participate in power balance.
Still preferably, in the virtual battery control method provided by the present invention, in the process of obtaining the virtual current value provided by the hydrogen storage, the virtual current value is generated by obtaining the reference pressure in the process of adjusting the hydrogen storage based on the hydrogen storage virtual battery model.
Further preferably, in the virtual storage battery control method provided by the invention, in the process of adjusting the hydrogen energy storage pressure to the reference pressure, the hydrogen energy storage pressure is controlled through the virtual current, the reference pressure is reduced when the virtual current is increased, and the reference pressure is increased when the virtual current is reduced, so that the consistency of the electrical parameters of all the electrical devices is ensured, and the unified regulation and control of all the devices on the charge-storage side is realized.
Still preferably, in the virtual storage battery control method provided by the present invention, in the process of adjusting the hydrogen storage pressure to the reference pressure, performance parameters for evaluating the configuration capacity and the running state of the virtual storage battery are obtained according to the relationship between the reference pressure and the rated pressure of the hydrogen storage tank;
in the process of controlling the virtual storage battery, the change of the charge state of the virtual storage battery is monitored according to the performance parameters, the change of hydrogen energy storage is mastered, and the prediction of faults or abnormal conditions is carried out.
Still preferably, in the virtual battery control method provided by the present invention, in a process of obtaining a performance parameter, the performance parameter includes a virtual battery state of charge, a virtual battery capacity, and a performance parameter of power consumption, where the virtual battery state of charge is used for describing a current energy state of hydrogen energy storage; obtaining the output power of the virtual storage battery according to the virtual current provided by the hydrogen energy storage, and obtaining the capacity of the virtual storage battery according to the rated pressure of the hydrogen energy storage; and obtaining the power consumption of the virtual storage battery in the operation process according to the variation of the pressure in the hydrogen storage tank in the operation process of the virtual storage battery.
Further preferably, in the virtual storage battery control method provided by the invention, in the process of obtaining the state of charge of the virtual storage battery, the state of charge of the virtual storage battery is represented according to the stored energy at the moment t of the virtual storage battery, the stored energy under the rated pressure of the hydrogen storage tank and the rated pressure of the hydrogen storage tank;
and the pressure of the hydrogen storage tank is characterized by monitoring the charge state of the pseudo-accumulator.
Still preferably, in the virtual storage battery control method provided by the present invention, in the process of obtaining the capacity of the virtual storage battery, the output power of the virtual storage battery is obtained according to the terminal voltage of the virtual storage battery and the virtual current value provided by the hydrogen energy storage at the time t;
based on the output power, the virtual storage battery capacity is obtained by obtaining the hydrogen energy stored by the hydrogen energy storage system.
Still preferably, in the virtual battery control method provided by the present invention, in the process of obtaining the power consumption, the power consumption is obtained according to the virtual current value by collecting the discharge duration of the virtual battery.
The invention provides a virtual storage battery control system based on hydrogen energy storage, which comprises:
the data acquisition module is used for acquiring hydrogen energy of the hydrogen energy storage system, pressure in a hydrogen storage tank, volume of the hydrogen storage tank, gas temperature, low-level heat value of hydrogen, virtual energy of a virtual storage battery and terminal voltage of the virtual storage battery as system operation data, wherein the hydrogen energy storage system consists of a synchronous generator set, a photovoltaic generator set, hydrogen energy storage, the storage battery and an active load;
the data processing module is used for constructing a hydrogen energy storage virtual storage battery model through system operation data based on the energy conversion relation between the stored hydrogen energy of the hydrogen energy storage system and the charging and discharging electric energy of the storage battery, and obtaining a virtual current value provided by the hydrogen energy storage;
and the virtual storage battery control module is used for adjusting the hydrogen energy storage pressure to the reference pressure according to the virtual current value and controlling the virtual storage battery so as to enable the hydrogen energy storage to participate in power balance.
Still preferably, the data processing module of the virtual storage battery control system provided by the invention is further configured to generate a virtual current value by acquiring a reference pressure in a hydrogen storage regulation process according to the constructed hydrogen storage virtual storage battery model.
Example 1: the invention provides a virtual storage battery control method based on hydrogen energy storage, which specifically comprises the following steps:
s1, establishing a hydrogen energy storage virtual storage battery model according to an energy conversion relation between hydrogen energy stored in a hydrogen storage tank and storage battery charging and discharging electric energy;
specifically, the hydrogen energy storage stores hydrogen energy, and is expressed by the following formula:
wherein W is H (T) represents hydrogen energy stored by the hydrogen energy storage system, p (T) represents the pressure in the hydrogen storage tank, V is the volume of the hydrogen storage tank, T is the gas temperature,is the lower heating value of hydrogen.
The storage battery stores energy in a full-charge state, and the energy is expressed by the following formula:
W B (t)＝∫U B I B (t)dt；
wherein U is B Indicating the voltage at two ends of the storage battery, I B And (t) represents a charge-discharge current.
In the modeling process of the virtual storage battery, the voltage at two ends of the virtual storage battery is assumed to be a set value, a hydrogen energy storage virtual storage battery model is established, and the specific formula is expressed as follows:
wherein W is v (t) represents virtual energy, U, of the virtual battery v Representing the terminal voltage of a virtual battery, I v And (t) represents a virtual current value provided by hydrogen energy storage at the time t. The hydrogen energy storage is controlled by establishing a virtual storage battery model, namely, the hydrogen energy stored in the hydrogen storage tank is stored in the hydrogen storage tankThe system is released in the form of electric energy when needed and is simulated into a storage battery for regulation and control.
S2, calculating a virtual current value provided by hydrogen energy storage based on the hydrogen energy storage virtual storage battery model;
the virtual current value is expressed by the following formula:
wherein p is ref (t+1) represents a reference pressure during hydrogen storage regulation.
And S3, adjusting the hydrogen energy storage pressure to the reference pressure according to the virtual current value so as to enable the hydrogen energy storage to participate in power balance.
Preferably, adjusting the hydrogen storage tank pressure to a reference pressure according to the virtual current value includes:
obtaining a reference pressure of the hydrogen energy storage system in the adjusting process according to the virtual current value, wherein the reference pressure is expressed by the following formula:
the virtual current is introduced to control the pressure of the hydrogen energy storage, the reference pressure is reduced when the virtual current is increased, and the reference pressure is increased when the virtual current is reduced, so that the consistency of the electrical parameters of all the electrical equipment is ensured, and the unified regulation and control of all the equipment on the charge-storage side is realized.
It is worth to say that the controlled system of this embodiment is made up of five parts of synchronous generator set, photovoltaic generator set, hydrogen energy storage, accumulator and active load. The photovoltaic generator set is connected to a direct current bus through a DC/DC converter, the hydrogen energy storage electrolytic tank and the fuel cell module are connected to the direct current bus through a BUCK converter and a BOOST converter respectively, and the storage battery is connected to the direct current bus through a bidirectional DC/DC converter; finally, the three parts are combined into a synchronous machine alternating current main network with load through a DC/AC inverter.
In one embodiment, as shown in fig. 2, the system engages the virtual battery to participate in power balancing at 0.7s, the virtual battery providing a virtual current of 27.4A. Further, as shown in fig. 3, the simulation simulates a sudden increase in active load at 0.7s versus the dynamic response of the electrical quantities of the various elements of the system before and after the application of the virtual battery control strategy. PL represents the active load sudden increase power, PG represents the power generated by the synchronous generator, f represents the system frequency, PB represents the power of the battery, and PH represents the power of the hydrogen storage. The specific simulation process is as follows: at 0.7s, the virtual battery is put into service, taking part in regulating the unbalanced power caused by the sudden load increase of 20 kW. Compared with the system before the virtual storage battery control strategy is applied, the system frequency quality is improved, the frequency drop extremum is increased, and meanwhile, the steady-state deviation is reduced by 0.3Hz; in addition, the frequency modulation pressure of the synchronous generator is reduced, and the generated active load is reduced by 11.2kW. For the storage battery, due to the addition of hydrogen energy storage, the condition of insufficient adjustment capability of the storage battery after 4.6s is avoided, the frequency of the storage battery in use is reduced, and the running economy of the system is greatly improved.
The virtual storage battery control method based on hydrogen energy storage, which is mentioned in the embodiment, further comprises the following steps:
and S4, obtaining performance parameters for evaluating the configuration capacity and the running state of the virtual storage battery according to the relation between the reference pressure and the rated pressure of the hydrogen storage tank.
In order to make the virtual battery model more accurate and practical, the present embodiment introduces performance parameters including at least the virtual battery state of charge, the virtual battery capacity, and the power consumption.
The virtual battery state of charge is a description of the current energy state of the hydrogen storage. This parameter is similar to the SOC parameter of the solid state battery and reflects the percentage of remaining energy of the hydrogen storage system to the nominal energy. And obtaining the charge state of the virtual storage battery according to the rated pressure of the hydrogen storage tank, wherein the charge state of the virtual storage battery is expressed by adopting the following formula:
wherein SOC is v (t) represents the state of charge of the virtual battery, W HN (t) represents the stored energy at time t of the virtual battery, W HN Represents the stored energy, p, under the rated pressure of the hydrogen storage tank N Indicating the rated pressure of the hydrogen storage tank.
From the above, it can be seen that the virtual state of charge is directly related to the hydrogen storage tank pressure, i.e. when SOC v When the voltage is increased, p is increased, which is equivalent to the charging process of the virtual storage battery; when SOC is v And when the voltage is reduced, p is reduced, which is equivalent to the discharging process of the virtual storage battery. In the running process, the change of the hydrogen energy storage can be mastered in time by monitoring the change of the charge state of the virtual storage battery, the possible faults or abnormal conditions of the hydrogen energy storage can be predicted, the energy utilization efficiency is improved, and the energy cost is saved.
In one embodiment, as shown in fig. 4, when the virtual battery control strategy is not applied, the state of charge of the battery reaches a lower limit at 4.6s, and in order to adjust the unbalanced power of the system, only the frequency quality of the system can be sacrificed, and the adjusting pressure of the synchronous generator can be increased. After the virtual storage battery is put into the system, the hydrogen energy stored by the hydrogen energy storage is effectively utilized, the storage battery is prevented from being charged and discharged frequently, the service life of the storage battery is prolonged, and the economic operation of the system is facilitated.
Further, the output power of the virtual storage battery is obtained according to the virtual current provided by the hydrogen energy storage, and the output power of the virtual storage battery is expressed by the following formula:
P v (t)＝U v I v (t)；
wherein P is v And (t) represents the output power of the virtual storage battery at the time t.
Obtaining a virtual storage battery capacity according to the rated pressure of hydrogen energy storage, wherein the virtual storage battery capacity is expressed by adopting the following formula:
wherein Q is HN Representing the virtual battery rated capacity.
And obtaining the power consumption of the virtual storage battery in the operation process according to the variation of the pressure in the hydrogen storage tank in the operation process of the virtual storage battery, wherein the power consumption is expressed by adopting the following formula:
wherein DeltaQ Hv Representing the power consumption of the virtual storage battery in the running process, t v Indicating the discharge time period of the virtual battery.
In the virtual storage battery model, for the hydrogen storage self system, the pressure regulation and control instruction can be received and transmitted by the internal control system, and the hydrogen production rate is regulated by controlling the opening of the valve, so that the hydrogen production rate is more accurate; for the energy storage power station, the electric quantity and the power generation state of the hydrogen energy storage can be evaluated in real time, and the coordination control of various energy forms including the hydrogen energy is ensured by adjusting electric parameters.
According to the virtual storage battery control method based on hydrogen energy storage, the virtual storage battery model established based on the hydrogen energy storage takes the pressure of the hydrogen storage tank as a control object. In the aspect of hydrogen energy storage, the pressure regulation and control instruction can be directly received and transmitted by the control main board, so that the system is visual and accurate; in the electric power system, the pressure signal is directly converted into a storage battery current signal which can be uniformly scheduled, so that the coordination control of various energy forms including hydrogen energy can be ensured. The virtual current is used as a parameter for unified regulation, the virtual storage battery capacity and the virtual storage battery charge state are used as performance indexes for evaluating the hydrogen storage equivalent to the capacity configuration after the virtual storage battery, a scientific basis is provided for unified scheduling of the hydrogen storage and the traditional storage by the energy storage power station, and the rapidity and the flexibility of the response of the energy storage side of the system are improved.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In the description of the present invention, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (10)
1. The virtual storage battery control method based on the hydrogen energy storage is characterized by comprising the following steps of:
based on the energy conversion relation between the stored hydrogen energy of the hydrogen energy storage system and the charge and discharge electric energy of the storage battery, constructing a hydrogen energy storage virtual storage battery model by collecting the hydrogen energy stored by the hydrogen energy storage system, the in-tank pressure of the hydrogen storage tank, the volume of the hydrogen storage tank, the gas temperature, the low-level heat value of the hydrogen, the virtual energy of the virtual storage battery and the terminal voltage of the virtual storage battery, and obtaining a virtual current value provided by the hydrogen energy storage, wherein the hydrogen energy storage system consists of a synchronous generator set, a photovoltaic generator set, the hydrogen energy storage, the storage battery and an active load;
and according to the virtual current value, regulating the hydrogen energy storage pressure to the reference pressure, and controlling the virtual storage battery to enable the hydrogen energy storage to participate in power balance.
2. The method for controlling a virtual battery based on hydrogen storage according to claim 1, wherein:
and generating the virtual current value by acquiring the reference pressure in the hydrogen energy storage regulation process based on the hydrogen energy storage virtual storage battery model in the process of acquiring the virtual current value provided by the hydrogen energy storage.
3. The method for controlling a virtual battery based on hydrogen storage according to claim 2, wherein:
in the process of adjusting the hydrogen energy storage pressure to the reference pressure, the hydrogen energy storage pressure is controlled through the virtual current, the reference pressure is reduced when the virtual current is increased, the reference pressure is increased when the virtual current is reduced, the consistency of the electrical parameters of all the electrical devices is ensured, and the unified adjustment and control of all the devices on the charge-storage side is realized.
4. The virtual battery control method based on hydrogen storage according to claim 3, wherein:
in the process of adjusting the hydrogen energy storage pressure to the reference pressure, obtaining performance parameters for evaluating the configuration capacity and the running state of the virtual storage battery according to the relation between the reference pressure and the rated pressure of the hydrogen storage tank;
in the process of controlling the virtual storage battery, the change of the charge state of the virtual storage battery is monitored according to the performance parameters, the change of hydrogen energy storage is mastered, and the prediction of faults or abnormal conditions is carried out.
5. The method for controlling a virtual battery based on hydrogen storage according to claim 4, wherein:
in the process of acquiring performance parameters, the performance parameters comprise a virtual storage battery charge state, a virtual storage battery capacity and power consumption, wherein the virtual storage battery charge state is used for describing the current energy state of hydrogen energy storage; obtaining the output power of a virtual storage battery according to the virtual current provided by the hydrogen energy storage, and obtaining the capacity of the virtual storage battery according to the rated pressure of the hydrogen energy storage; and obtaining the power consumption of the virtual storage battery in the operation process according to the variation of the pressure in the hydrogen storage tank in the operation process of the virtual storage battery.
6. The method for controlling a virtual battery based on hydrogen storage according to claim 5, wherein:
in the process of acquiring the charge state of the virtual storage battery, representing the charge state of the virtual storage battery according to the stored energy of the virtual storage battery at the moment t, the stored energy of the hydrogen storage tank under the rated pressure and the rated pressure of the hydrogen storage tank;
and the pressure of the hydrogen storage tank is characterized by monitoring the charge state of the quasi-storage battery.
7. The method for controlling a virtual battery based on hydrogen storage according to claim 6, wherein:
in the process of obtaining the capacity of the virtual storage battery, obtaining the output power of the virtual storage battery according to the terminal voltage of the virtual storage battery and a virtual current value provided by hydrogen energy storage at the moment t;
and acquiring the capacity of the virtual storage battery by acquiring the hydrogen energy stored by the hydrogen energy storage system based on the output power.
8. The method for controlling a virtual battery based on hydrogen storage according to claim 7, wherein:
and in the process of acquiring the power consumption, acquiring the power consumption according to the virtual current value by acquiring the discharge time length of the virtual storage battery.
9. A virtual battery control system based on hydrogen storage, comprising:
the system comprises a data acquisition module, a control module and a control module, wherein the data acquisition module is used for acquiring hydrogen energy of a hydrogen energy storage system, in-tank pressure of a hydrogen storage tank, volume of the hydrogen storage tank, gas temperature, low-level heat value of hydrogen, virtual energy of a virtual storage battery and terminal voltage of the virtual storage battery as system operation data, and the hydrogen energy storage system consists of a synchronous generator set, a photovoltaic generator set, hydrogen energy storage, the storage battery and an active load;
the data processing module is used for constructing the hydrogen energy storage virtual storage battery model through the system operation data based on the energy conversion relation between the stored hydrogen energy of the hydrogen energy storage system and the storage battery charging and discharging electric energy, and obtaining a virtual current value provided by the hydrogen energy storage;
and the virtual storage battery control module is used for adjusting the hydrogen energy storage pressure to the reference pressure according to the virtual current value and controlling the virtual storage battery so as to enable the hydrogen energy storage to participate in power balance.
10. The method for controlling a virtual battery based on hydrogen storage according to claim 9, wherein:
the data processing module is also used for generating the virtual current value by acquiring the reference pressure in the hydrogen energy storage regulation process according to the constructed hydrogen energy storage virtual storage battery model.
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| JP2007295650A (en) * | 2006-04-21 | 2007-11-08 | Ipb:Kk | Power management system for each dwelling of collective housing employing virtual power storage secondary battery, and power fee charging method |
| CN107367696A (en) * | 2017-08-23 | 2017-11-21 | 东北电力大学 | A kind of power electronics universal battery simulated behavior method and simulator |
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| JP2007295650A (en) * | 2006-04-21 | 2007-11-08 | Ipb:Kk | Power management system for each dwelling of collective housing employing virtual power storage secondary battery, and power fee charging method |
| CN107367696A (en) * | 2017-08-23 | 2017-11-21 | 东北电力大学 | A kind of power electronics universal battery simulated behavior method and simulator |
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