CN115603337A - Economic frequency modulation system and method based on super capacitor - Google Patents
Economic frequency modulation system and method based on super capacitor Download PDFInfo
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- CN115603337A CN115603337A CN202211456530.8A CN202211456530A CN115603337A CN 115603337 A CN115603337 A CN 115603337A CN 202211456530 A CN202211456530 A CN 202211456530A CN 115603337 A CN115603337 A CN 115603337A
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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
- H02J3/241—The oscillation concerning frequency
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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
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/466—Scheduling the operation of the generators, e.g. connecting or disconnecting generators to meet a given demand
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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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
Abstract
The utility model provides an economic frequency modulation system and method based on super capacitor for solve battery energy storage cycle life short, with high costs among the relevant art, lead to the problem that frequency modulation efficiency is low, the response is slow, the system includes: super capacitor module, generator module and frequency modulation module, wherein: the frequency modulation module is used for receiving a regulation instruction of the power grid and controlling the generator module to perform frequency modulation according to the regulation instruction; the generator module comprises a generator set and a generator power measuring device, the generator set is used for frequency modulation according to instructions of the frequency modulation module, and the generator power measuring device is used for measuring the power of the generator set and feeding the power back to the frequency modulation module; the super capacitor module comprises a super capacitor and a super capacitor control device, the super capacitor is used for storing and releasing electric energy, and the super capacitor control device is used for assisting the generator module to modulate frequency through the super capacitor based on the instruction of the frequency modulation module so that the output power accords with the adjustment instruction.
Description
Technical Field
The disclosure relates to the technical field of energy control, in particular to an economical frequency modulation system and method based on a super capacitor.
Background
At present, in a power system in China, a traditional generator set mainly provides an Automatic Gain Control (AGC) function, and as traditional power supplies are all mechanical devices with rotational inertia, and a series of complex processes are needed for converting primary energy into electric energy, the adjustment response speed of a thermal power unit to active power is slow. The energy storage technology is applied to the field of AGC, and has the advantages that the frequency modulation of a conventional generator set is incomparable in the application of power grid frequency modulation due to the basic advantages of high response speed, accurate control and bidirectional adjustment capability. In recent years, the battery energy storage system is adopted in thermal power generating units in China to jointly carry out AGC (automatic gain control) and is gradually applied to engineering.
The energy storage auxiliary AGC frequency modulation technology of the lithium battery widely adopted at present has large capacity and short cycle life, and a large-capacity battery far exceeding the AGC regulation requirement must be configured to meet the requirement, so that the method is not economical under the current technical level of the lithium battery.
Disclosure of Invention
The invention provides an economical frequency modulation system and method based on a super capacitor, which are used for solving the problems of low frequency modulation efficiency and slow response caused by short battery energy storage cycle life and high cost in the related technology.
In a first aspect, an embodiment of the present invention provides an economic frequency modulation system based on a super capacitor, including a super capacitor module, a generator module, and a frequency modulation module, where:
the frequency modulation module is used for receiving a regulation instruction of the power grid and controlling the generator module to perform frequency modulation according to the regulation instruction;
the generator module comprises a generator set and a generator power measuring device, the generator set is used for frequency modulation according to instructions of the frequency modulation module, and the generator power measuring device is used for measuring the power of the generator set and feeding the power back to the frequency modulation module;
the super capacitor module comprises a super capacitor and a super capacitor control device, the super capacitor is used for storing and releasing electric energy, and the super capacitor control device is used for assisting the generator module to modulate frequency through the super capacitor based on the instruction of the frequency modulation module so that the output power accords with the adjustment instruction.
In a second aspect, an embodiment of the present invention provides an economical frequency modulation control method based on a super capacitor, which is applied to the system as mentioned in the first aspect, and includes:
receiving a regulating instruction of a power grid;
controlling the frequency modulation of the generator set based on the adjusting instruction, and acquiring the power of the generator set;
and controlling the super capacitor module to store or release electric energy according to the power.
In a possible implementation manner, in the method provided by the embodiment of the present invention, after controlling the super capacitor module to store or release the electric energy according to the power, the method further includes:
and recording a frequency modulation state, wherein the frequency modulation state comprises a power state of the generator set and electric quantity stored or released by the super capacitor module.
In a possible implementation manner, in the method provided by the embodiment of the present invention, after receiving the adjustment instruction of the power grid, the method further includes:
and sending adjustment preparation information to the super capacitor module based on the frequency modulation state so that the super capacitor is ready for storing or releasing electric energy before the power of the generator set is changed.
In a possible implementation manner, in the method provided in an embodiment of the present invention, controlling frequency modulation of a generator set based on a regulation instruction, and acquiring power of the generator set includes:
acquiring safety parameters of the generator set, wherein the safety parameters comprise main steam flow and main steam pressure;
when the safety parameters are in the preset threshold value, controlling the frequency modulation of the generator set based on the adjusting instruction, and when the safety parameters are not in the preset threshold value, stopping adjusting the frequency of the generator set;
and obtaining the power of the generator set.
In a third aspect, an embodiment of the present invention provides an economic frequency modulation control apparatus based on a super capacitor, including:
the receiving unit is used for receiving a regulating instruction of the power grid;
the processing unit is used for controlling the frequency modulation of the generator set based on the adjusting instruction and acquiring the power of the generator set;
and the control unit is used for controlling the super capacitor module to store or release electric energy according to the power.
In a possible implementation manner, in the apparatus provided in this embodiment of the present invention, the receiving unit is further configured to:
and recording a frequency modulation state, wherein the frequency modulation state comprises a power state of the generator set and electric quantity stored or released by the super capacitor module.
In a possible implementation manner, in the apparatus provided in this embodiment of the present invention, the processing unit is further configured to:
and sending adjustment preparation information to the super capacitor module based on the frequency modulation state so that the super capacitor is ready for storing or releasing electric energy before the power of the generator set is changed.
In a possible implementation manner, in the apparatus provided in the embodiment of the present invention, the processing unit is further configured to:
obtaining safety parameters of the generator set, wherein the safety parameters comprise main steam flow and main steam pressure;
when the safety parameters are in the preset threshold value, controlling the frequency modulation of the generator set based on the adjusting instruction, and when the safety parameters are not in the preset threshold value, stopping adjusting the frequency of the generator set;
and acquiring the power of the generator set.
In a fourth aspect, an embodiment of the present invention provides an electronic device, including: at least one processor, at least one memory, and computer program instructions stored in the memory, which when executed by the processor, implement the method provided by the second aspect of embodiments of the present invention.
In a fifth aspect, the embodiment of the present invention provides a computer-readable storage medium, on which computer program instructions are stored, and when the computer program instructions are executed by a processor, the method provided by the second aspect of the embodiment of the present invention is implemented.
The economic frequency modulation system based on the super capacitor provided by the embodiment of the invention comprises:
super capacitor module, generator module and frequency modulation module, wherein: the frequency modulation module is used for receiving a regulating instruction of the power grid and controlling the generator module to modulate frequency according to the regulating instruction; the generator module comprises a generator set and a generator power measuring device, the generator set is used for frequency modulation according to the instruction of the frequency modulation module, and the generator power measuring device is used for measuring the power of the generator set and feeding the power back to the frequency modulation module; the super capacitor module comprises a super capacitor and a super capacitor control device, the super capacitor is used for storing and releasing electric energy, and the super capacitor control device is used for assisting the generator module to modulate frequency through the super capacitor based on the instruction of the frequency modulation module so that the output power accords with the adjustment instruction. Compared with the prior art, the method solves the problems of low frequency modulation efficiency and slow response caused by short cycle life and high cost of battery energy storage, has the characteristics of long cycle life and good safety, is matched with the requirements of short-time and high-frequency AGC (automatic gain control) frequency modulation of a unit, is suitable for the frequency modulation application scene of a power system, and reduces the frequency modulation cost.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments will be briefly introduced below, and it is apparent that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings may be obtained according to the drawings without inventive labor.
Fig. 1 is a schematic structural diagram of an economical frequency modulation system based on a super capacitor according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a frequency modulation principle based on a super capacitor according to an embodiment of the present invention;
fig. 3 is a schematic flow chart of an economical frequency modulation method based on a super capacitor according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an economical frequency modulation control apparatus based on a super capacitor according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an electronic device of an economical frequency modulation method based on a super capacitor according to an embodiment of the present invention.
Detailed Description
In order that the above objects, features and advantages of the present disclosure may be more clearly understood, aspects of the present disclosure will be further described below. It should be noted that the embodiments and features of the embodiments of the present disclosure may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced in other ways than those described herein; it is to be understood that the embodiments disclosed in the specification are only a few embodiments of the present disclosure, and not all embodiments.
Some of the words that appear in the text are explained below:
1. the term "and/or" in the embodiments of the present invention describes an association relationship of associated objects, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
2. In the embodiment of the present invention, the term "AGC", automatic Generation Control (AGC) is an important function in the energy management system EMS, and controls the output of the frequency modulation unit to meet the changing power demand of the user and to keep the system in an economic operation state.
The application scenario described in the embodiment of the present invention is for more clearly illustrating the technical solution of the embodiment of the present invention, and does not form a limitation on the technical solution provided in the embodiment of the present invention, and it can be known by a person skilled in the art that with the occurrence of a new application scenario, the technical solution provided in the embodiment of the present invention is also applicable to similar technical problems. In the description of the present invention, the term "plurality" means two or more unless otherwise specified.
At present, the traditional power supply is mainly composed of mechanical devices with rotation inertia, and a series of complex processes are needed to convert primary energy into electric energy, so that the adjustment response speed of the thermal power unit to active power is low. The energy storage technology is applied to the field of AGC, and has the advantages that the response speed is high, the control is accurate, and the bidirectional regulation capability is realized, so that the energy storage technology has the advantages that the frequency modulation of a conventional generator set is incomparable to the frequency modulation of a power grid. In recent years, the battery energy storage system is adopted in thermal power generating units in China to jointly perform AGC, and the battery energy storage system is gradually applied to engineering.
The energy storage auxiliary AGC frequency modulation technology of the lithium battery widely adopted at present has large capacity and short cycle life, and a large-capacity battery far exceeding the AGC adjustment requirement must be configured to meet the requirement, so that the method is an uneconomical method which must be adopted under the current lithium battery technical level. Aiming at the application requirement of AGC frequency modulation of a power plant on high-frequency secondary high-power bidirectional charging and discharging, the service life of a battery is shortened, a plurality of projects cannot reach the designed service life, and the problem is gradually revealed. The design life of the battery is 3-5 years, which is calculated according to some projects with small frequency modulation requirements, and the design life is far from the design life in some projects with large frequency modulation requirements. Thus, battery life is an important factor affecting the economics of an energy storage project.
From the view of battery types, the accidents of the ternary lithium battery are the most, firstly, most of the fire accidents of the energy storage power station occur in the charging process or the pause process after the charging process, at the moment, the battery voltage is higher, the battery activity is higher, the circulation current is formed among the parallel battery clusters, the battery core is in the over-charging state, the voltage is increased to form the internal short circuit, and the fire accidents are easily caused; and secondly, after the energy storage power station is on fire, a fire extinguishing device using gas such as heptafluoropropane is adopted to extinguish fire by isolating oxygen, but the temperature of the battery cannot be reduced, once external oxygen enters the battery, the battery can be easily re-ignited, and combustible and explosive gases such as carbon monoxide and methane can be generated in the combustion process of the battery, and even gas explosion can be caused after the battery is re-ignited. With the rapid growth of energy storage project construction at home and abroad, the safety problem is increasingly prominent, and particularly, the fire accident is highly concerned by all the communities.
As shown in fig. 1, the super capacitor-based economical frequency modulation system provided in the embodiment of the present disclosure includes:
the frequency modulation module 103 is used for receiving a regulation instruction of the power grid and controlling the generator module to perform frequency modulation according to the regulation instruction;
the generator module 102 comprises a generator set 1021 and a generator power measuring device 1022, wherein the generator set 1021 is used for frequency modulation according to an instruction of the frequency modulation module, and the generator power measuring device 1022 is used for measuring the power of the generator set and feeding the power back to the frequency modulation module;
the super capacitor module 101 comprises a super capacitor 1011 and a super capacitor control device 1012, wherein the super capacitor 1011 is used for storing and releasing electric energy, and the super capacitor control device 1012 is used for assisting the generator module 102 in frequency modulation through the super capacitor based on the instruction of the frequency modulation module, so that the output power conforms to the adjustment instruction. The specific frequency modulation principle is shown in fig. 2.
As shown in fig. 3, an economical frequency modulation control method based on a super capacitor according to an embodiment of the present disclosure is applied to the system as mentioned in fig. 1, and includes:
and S301, receiving a regulating instruction of the power grid.
During specific implementation, the frequency modulation module receives a regulation instruction of a power grid, then informs the generator set to prepare frequency modulation, and simultaneously informs the super capacitor module so that the super capacitor can quickly respond and prepare for storing or releasing electric energy before the power of the generator set is changed.
And step S302, controlling the frequency modulation of the generator set based on the adjusting instruction, and acquiring the power of the generator set.
During specific implementation, the maximum frequency modulation is carried out on the premise of ensuring the safety of the generator set, the power is fed back in real time, specifically, the safety parameters of the generator set are firstly obtained, the safety parameters comprise main steam flow and main steam pressure, then when the safety parameters are in the preset threshold value, the frequency modulation of the generator set is controlled based on the adjusting instruction, and when the safety parameters are not in the preset threshold value, the frequency of the generator set is stopped being adjusted. And finally, feeding back the power of the generator set to the frequency modulation module.
And step S303, controlling the super capacitor module to store or release electric energy according to the power.
During specific implementation, the frequency modulation module monitors the unit power in real time, calculates the output of the super capacitor after receiving an instruction, and then quickly responds. And the super capacitor module gradually exits along with the response of the unit output to the instruction to complete an auxiliary response process, and completes the required slow charging and discharging process according to the cooperative scheduling of the unit output condition in the neutral position of the auxiliary response so as to keep the continuous output capability level of the system.
When the load is stabilized, the generator set actively increases or decreases the output according to the existing electric quantity of the super capacitor, pre-charges or discharges the capacitor, and provides an adjustable margin for follow-up unpredictable lifting load scheduling. Under the special working condition of continuous load increasing or continuous load decreasing, the pre-charging or pre-discharging direction of the super capacitor can be positively regulated by the specific generator set, and the frequency modulation state is recorded in the whole process, wherein the frequency modulation state comprises the power state of the generator set and the electric quantity stored or released by the super capacitor module, so that the frequency modulation module can modify pre-distribution according to the frequency modulation state.
By using the economic frequency modulation method based on the super capacitor, the characteristics of long cycle life and good safety of the super capacitor can be exerted, the method is suitable for the frequency modulation application scene of the power system, the frequency modulation efficiency is improved, and the cost is reduced.
As shown in fig. 4, an embodiment of the present invention provides an economical frequency modulation apparatus based on a super capacitor, including:
a receiving unit 401, configured to receive a regulation instruction of a power grid;
the processing unit 402 is used for controlling the frequency modulation of the generator set based on the adjusting instruction and acquiring the power of the generator set;
and a control unit 403, configured to control the super capacitor module to store or release electric energy according to the power.
In a possible implementation manner, in the apparatus provided in this embodiment of the present invention, the receiving unit is further configured to:
and recording a frequency modulation state, wherein the frequency modulation state comprises a power state of the generator set and electric quantity stored or released by the super capacitor module.
In a possible implementation manner, in the apparatus provided in the embodiment of the present invention, the processing unit is further configured to:
and sending adjustment preparation information to the super capacitor module based on the frequency modulation state so that the super capacitor is ready for storing or releasing electric energy before the power of the generator set is changed.
In a possible implementation manner, in the apparatus provided in the embodiment of the present invention, the processing unit is further configured to:
acquiring safety parameters of the generator set, wherein the safety parameters comprise main steam flow and main steam pressure;
when the safety parameters are in the preset threshold value, controlling the frequency modulation of the generator set based on the adjusting instruction, and when the safety parameters are not in the preset threshold value, stopping adjusting the frequency of the generator set;
and obtaining the power of the generator set.
In addition, the supercapacitor-based economic frequency modulation control method and apparatus described in conjunction with fig. 2-4 may be implemented by an electronic device. Fig. 5 shows a hardware structure diagram of an electronic device according to an embodiment of the present application.
Referring now specifically to fig. 5, a schematic diagram of an electronic device 500 suitable for use in implementing embodiments of the present disclosure is shown. The electronic device shown in fig. 5 is only an example, and should not bring any limitation to the functions and the scope of use of the embodiments of the present disclosure.
As shown in fig. 5, the electronic device 500 may include a processing means (e.g., a central processing unit, a graphic processor, etc.) 501 that may perform various appropriate actions and processes according to a program stored in a Read Only Memory (ROM) 502 or a program loaded from a storage means 508 into a Random Access Memory (RAM) 503 to implement the voice control method of the embodiments as described in the present disclosure. In the RAM 503, various programs and data necessary for the operation of the electronic apparatus 500 are also stored. The processing device 501, the ROM 502, and the RAM 503 are connected to each other through a bus 504. An input/output (I/O) interface 505 is also connected to bus 504.
Generally, the following devices may be connected to the I/O interface 505: input devices 506 including, for example, a touch screen, touch pad, keyboard, mouse, camera, microphone, accelerometer, gyroscope, etc.; output devices 507 including, for example, a Liquid Crystal Display (LCD), a speaker, a vibrator, and the like; storage devices 508 including, for example, magnetic tape, hard disk, etc.; and a communication device 509. The communication means 509 may allow the electronic device 500 to communicate with other devices wirelessly or by wire to exchange data. While fig. 5 illustrates an electronic device 500 having various means, it is to be understood that not all illustrated means are required to be implemented or provided. More or fewer devices may be alternatively implemented or provided.
In particular, according to an embodiment of the present disclosure, the processes described above with reference to the flowcharts may be implemented as computer software programs. For example, embodiments of the present disclosure include a computer program product comprising a computer program carried on a non-transitory computer readable medium, the computer program containing program code for performing the method illustrated by the flow chart, thereby implementing the voice control method as described above. In such an embodiment, the computer program may be downloaded and installed from a network via the communication means 509, or installed from the storage means 508, or installed from the ROM 502. The computer program performs the above-described functions defined in the methods of the embodiments of the present disclosure when executed by the processing device 501.
It should be noted that the computer readable medium in the present disclosure can be a computer readable signal medium or a computer readable storage medium or any combination of the two. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples of the computer readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the present disclosure, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. In contrast, in the present disclosure, a computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to: electrical wires, optical cables, RF (radio frequency), etc., or any suitable combination of the foregoing.
In some embodiments, the clients, servers may communicate using any currently known or future developed network Protocol, such as HTTP (HyperText Transfer Protocol), and may interconnect with any form or medium of digital data communication (e.g., a communications network). Examples of communication networks include a local area network ("LAN"), a wide area network ("WAN"), the Internet (e.g., the Internet), and peer-to-peer networks (e.g., ad hoc peer-to-peer networks), as well as any currently known or future developed network.
The computer readable medium may be embodied in the electronic device; or may exist separately without being assembled into the electronic device.
The computer readable medium carries one or more programs which, when executed by the electronic device, cause the electronic device to:
receiving a regulating instruction of a power grid;
controlling the frequency modulation of the generator set based on the adjusting instruction, and acquiring the power of the generator set;
and controlling the super capacitor module to store or release electric energy according to the power.
Optionally, when the one or more programs are executed by the electronic device, the electronic device may further perform other steps described in the above embodiments.
Computer program code for carrying out operations for the present disclosure may be written in any combination of one or more programming languages, including but not limited to an object oriented programming language such as Java, smalltalk, C + +, and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the latter scenario, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider).
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
The units described in the embodiments of the present disclosure may be implemented by software or hardware. Wherein the name of an element does not in some cases constitute a limitation on the element itself.
The functions described herein above may be performed, at least in part, by one or more hardware logic components. For example, without limitation, exemplary types of hardware logic components that may be used include: field Programmable Gate Arrays (FPGAs), application Specific Integrated Circuits (ASICs), application Specific Standard Products (ASSPs), system on a chip (SOCs), complex Programmable Logic Devices (CPLDs), and the like.
In the context of this disclosure, a machine-readable medium may be a tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. The machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
The super-capacitor-based economic frequency modulation system provided by the embodiment of the invention comprises:
super capacitor module, generator module and frequency modulation module, wherein: the frequency modulation module is used for receiving a regulation instruction of the power grid and controlling the generator module to perform frequency modulation according to the regulation instruction; the generator module comprises a generator set and a generator power measuring device, the generator set is used for frequency modulation according to instructions of the frequency modulation module, and the generator power measuring device is used for measuring the power of the generator set and feeding the power back to the frequency modulation module; the super capacitor module comprises a super capacitor and a super capacitor control device, the super capacitor is used for storing and releasing electric energy, and the super capacitor control device is used for assisting the frequency modulation of the generator module through the super capacitor based on the instruction of the frequency modulation module so as to enable the output power to accord with the adjustment instruction. Compared with the prior art, the method solves the problems of low frequency modulation efficiency and slow response caused by short cycle life and high cost of battery energy storage, has the characteristics of long cycle life and good safety, is matched with the requirements of short-time and high-frequency AGC (automatic gain control) frequency modulation of a unit, is suitable for the frequency modulation application scene of a power system, and reduces the frequency modulation cost.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and so forth) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams 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.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. The utility model provides an economic frequency modulation system based on super capacitor, is applied to thermal power plant unit, its characterized in that includes: super capacitor module, generator module and frequency modulation module, wherein:
the frequency modulation module is used for receiving a regulating instruction of a power grid and controlling the generator module to modulate frequency according to the regulating instruction;
the generator module comprises a generator set and a generator power measuring device, the generator set is used for frequency modulation according to instructions of the frequency modulation module, and the generator power measuring device is used for measuring the power of the generator set and feeding the power back to the frequency modulation module;
the super capacitor module comprises a super capacitor and a super capacitor control device, the super capacitor is used for storing and releasing electric energy, and the super capacitor control device is used for assisting the generator module to modulate frequency based on the instruction of the frequency modulation module so that the output power conforms to the adjustment instruction.
2. An economic frequency modulation method based on super capacitor, applied to the system as claimed in claim 1, characterized by comprising:
receiving a regulating instruction of a power grid;
controlling the frequency modulation of the generator set based on the adjusting instruction, and acquiring the power of the generator set;
and controlling the super capacitor module to store or release electric energy according to the power.
3. The method of claim 2, wherein after controlling the supercapacitor module to store or release electrical energy according to the power, further comprising:
and recording a frequency modulation state, wherein the frequency modulation state comprises a power state of the generator set and electric quantity stored or released by the super capacitor module.
4. The method of claim 3, wherein after receiving the grid regulation command, the method further comprises:
and sending adjustment preparation information to the super capacitor module based on the frequency modulation state, so that the super capacitor is ready to store or release electric energy before the power of the generator set is changed.
5. The method of claim 3, wherein controlling a generator set frequency modulation based on the adjustment command and obtaining power for the generator set comprises:
obtaining safety parameters of the generator set, wherein the safety parameters comprise main steam flow and main steam pressure;
when the safety parameters are in a preset threshold value, controlling the frequency modulation of the generator set based on the adjusting instruction, and when the safety parameters are not in the preset threshold value, stopping adjusting the frequency of the generator set;
and acquiring the power of the generator set.
6. An economical frequency modulation device based on super capacitor, characterized by comprising:
the receiving unit is used for receiving a regulating instruction of the power grid;
the processing unit is used for controlling the frequency modulation of the generator set based on the adjusting instruction and acquiring the power of the generator set;
and the control unit is used for controlling the super capacitor module to store or release electric energy according to the power.
7. The apparatus of claim 6, wherein the receiving unit is further configured to:
recording a frequency modulation state, wherein the frequency modulation state comprises a power state of the generator set and electric quantity stored or released by the super capacitor module.
8. The apparatus of claim 7, wherein the processing unit is further configured to:
and sending adjustment preparation information to the super capacitor module based on the frequency modulation state so that the super capacitor is ready for storing or releasing electric energy before the power of the generator set is changed.
9. The apparatus of claim 7, wherein the processing unit is further configured to:
obtaining safety parameters of the generator set, wherein the safety parameters comprise main steam flow and main steam pressure;
when the safety parameters are in a preset threshold value, controlling the frequency modulation of the generator set based on the adjusting instruction, and when the safety parameters are not in the preset threshold value, stopping adjusting the frequency of the generator set;
and acquiring the power of the generator set.
10. An electronic device, comprising:
a processor;
a memory for storing the processor-executable instructions;
wherein the processor is configured to execute the instructions to implement the supercapacitor-based economic frequency modulation method according to any one of claims 2 to 5.
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