CN115498706B - Capacitive energy storage auxiliary grid-related adjusting system and control method - Google Patents
Capacitive energy storage auxiliary grid-related adjusting system and control method Download PDFInfo
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- CN115498706B CN115498706B CN202211456538.4A CN202211456538A CN115498706B CN 115498706 B CN115498706 B CN 115498706B CN 202211456538 A CN202211456538 A CN 202211456538A CN 115498706 B CN115498706 B CN 115498706B
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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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- 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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Abstract
The utility model provides a supplementary net governing system that involves of capacitive energy storage and control method for the response ability of system is not enough when solving frequency disturbance, and then produces the control deviation, leads to the unit unstable, problem that the fault rate is high, and the system includes: energy storage module, unit decentralized control module and energy storage scheduling module, wherein: the energy storage module is used for storing or releasing electric energy according to the instruction of the energy storage scheduling module and feeding back an energy storage state to the energy storage scheduling module; the energy storage scheduling module is used for controlling the energy storage module to store or release electric energy according to the energy storage state and the AGC command after receiving the automatic generation control AGC command and when the time length from the load of the unit to the load dead zone is less than a preset time length threshold value; and the unit distributed control module is used for responding to the instruction of the energy storage scheduling module and adjusting the working parameters of the unit.
Description
Technical Field
The disclosure relates to the technical field of energy control, in particular to a capacitive energy storage auxiliary grid-related adjusting system and a control method.
Background
At present, in Automatic Gain Control (AGC) in a thermal power plant, the inertia of a large power grid is large, so that the response capability of a system is insufficient when frequency disturbance occurs, the adjustment capability is insufficient when a unit load enters a load dead zone, and further, a Control deviation is generated, so that the unit is unstable and the failure rate is high.
Disclosure of Invention
The invention provides a capacitive energy storage auxiliary grid-related adjusting system and a control method, which are used for solving the problems of unstable unit and high failure rate caused by control deviation due to insufficient response capability of the system during frequency disturbance in the related art.
In a first aspect, an embodiment of the present invention provides an auxiliary grid-related adjusting system for capacitive energy storage, including: energy storage module, unit decentralized control module and energy storage scheduling module, wherein:
the energy storage module is used for storing or releasing electric energy according to the instruction of the energy storage scheduling module and feeding back an energy storage state to the energy storage scheduling module;
the energy storage scheduling module is used for controlling the energy storage module to store or release electric energy according to the energy storage state and the AGC command after receiving the automatic generation control AGC command and when the time length from the load of the unit to the load dead zone is less than a preset time length threshold value;
and the unit decentralized control module is used for responding to the instruction of the energy storage scheduling module and adjusting the working parameters of the unit.
In a possible implementation manner, in the system provided in the embodiment of the present invention, the unit decentralized control module is further configured to: when the unit needs to respond to the load, the condensed water of the unit is called for energy storage, and the unit responds to the dispatching requirement of the load by using the condensate pump active frequency conversion technology.
In a second aspect, an embodiment of the present invention provides a capacitive energy storage assisted grid-related regulation control method, which is applied to the system as mentioned in the first aspect, and includes:
receiving an automatic generation control AGC instruction;
and when the time length from the load of the unit to the load dead zone is determined to be less than a preset time length threshold value, controlling the energy storage module to store or release electric energy.
In a possible implementation manner, in the method provided in an embodiment of the present invention, the method further includes:
monitoring the load deviation of the unit load in real time;
and when the load deviation is smaller than a preset load threshold value, controlling the energy storage module to stop storing or releasing the electric energy.
In a possible implementation manner, in the method provided in the embodiment of the present invention, after receiving the instruction of controlling AGC by automatic power generation, the method further includes:
and when the energy storage module meets the preset condition, controlling the energy storage module to store or release electric energy.
In a possible implementation manner, in the method provided in an embodiment of the present invention, the method further includes:
monitoring the load deviation of the unit load in real time;
and correcting the amplitude of the electric energy stored or released by the energy storage module based on the load deviation.
In a possible implementation manner, in the method provided in an embodiment of the present invention, the method further includes:
acquiring working parameters of a unit in real time;
and modifying the amplitude of the electric energy stored or released by the energy storage module based on the working parameters.
In a third aspect, an embodiment of the present invention provides a device for adjusting and controlling a capacitive energy storage auxiliary grid-related system, including:
the receiving unit is used for receiving an automatic generation control AGC instruction;
and the processing unit is used for controlling the energy storage module to store or release electric energy when the time length from the load of the unit to the load dead zone is determined to be less than a preset time length threshold value.
In a possible implementation manner, in the apparatus provided in this embodiment of the present invention, the processing unit is further configured to:
monitoring the load deviation of the unit load in real time;
and when the load deviation is smaller than a preset load threshold value, controlling the energy storage module to stop storing or releasing the electric energy.
In a possible implementation manner, in the apparatus provided in the embodiment of the present invention, the processing unit is further configured to:
and when the energy storage module meets the preset condition, controlling the energy storage module to store or release electric energy.
In a possible implementation manner, in the apparatus provided in this embodiment of the present invention, the processing unit is further configured to:
monitoring the load deviation of the unit load in real time;
and correcting the amplitude of the electric energy stored or released by the energy storage module based on the load deviation.
In a possible implementation manner, in the apparatus provided in this embodiment of the present invention, the processing unit is further configured to:
acquiring working parameters of a unit in real time;
and modifying the amplitude of the electric energy stored or released by the energy storage module based on the working parameters.
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, an 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 computer program instructions implement the method provided by the second aspect of the embodiment of the present invention.
The capacitive energy storage auxiliary grid-related adjusting system provided by the embodiment of the invention comprises:
energy storage module, unit decentralized control module and energy storage scheduling module, wherein: the energy storage module is used for storing or releasing electric energy according to the instruction of the energy storage scheduling module and feeding back an energy storage state to the energy storage scheduling module; the energy storage scheduling module is used for controlling the energy storage module to store or release electric energy according to the energy storage state and the AGC command after receiving the automatic generation control AGC command; and the unit decentralized control module is used for responding to the instruction of the energy storage scheduling module and adjusting the working parameters of the unit. Compared with the prior art, the problems of unstable unit and high failure rate caused by insufficient response capability of the system during frequency disturbance and further control deviation are solved, the AGC (automatic gain control) assessment index is optimized, the boiler pressure is relieved, and the stability and the safety of the unit are improved.
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 a capacitive energy storage assisted grid-related adjusting system according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of a capacitive energy storage auxiliary grid-related adjustment control method according to an embodiment of the present invention;
fig. 3 is a schematic diagram of an AGC assessment index of a power grid according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a control effect provided by an embodiment of the present invention;
FIG. 5 is a schematic diagram of another control effect provided by the embodiment of the present invention;
fig. 6 is a schematic structural diagram of an auxiliary grid-related adjustment control device for storing energy in a capacitor according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of an electronic device of a capacitive energy storage assisted grid-related adjustment method 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, in the case of no conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.
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 otherwise than as 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. The term "DCS" in the embodiments of the present invention generally refers to a distributed control system (distributed control system), which is a new generation of instrument control system based on a microprocessor and using a design principle of distributed control functions, centralized display operations, and consideration of both sub-control and autonomous control and comprehensive coordination. The distributed control system is called DCS for short, and can also be translated into a distributed control system or a distributed computer control system.
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, in Automatic Gain Control (AGC) in a thermal power plant, due to large inertia of a large power grid, response capability of a system is insufficient when frequency disturbance occurs, adjustment capability is insufficient when a unit load enters a load dead zone, control deviation is further generated, and a unit is unstable and has high failure rate.
In order to efficiently and flexibly assist the frequency modulation of the unit by the super capacitor energy storage component, a capacitor energy storage auxiliary grid-related regulation control system needs to be established, the charge and discharge actions, the charge and discharge speed and the charge and discharge electric quantity of the super capacitor are reasonably and safely guided by controlling the logic configuration, and the AGC frequency modulation performance of the unit is improved in a targeted manner.
As shown in fig. 1, the capacitive energy storage assisted grid-related adjusting system provided in the embodiment of the present disclosure includes:
the system comprises an energy storage module 101, a unit decentralized control module 102 and an energy storage scheduling module 103, wherein:
the energy storage module 101 is configured to store or release electric energy according to an instruction of the energy storage scheduling module, and feed back an energy storage state to the energy storage scheduling module.
The energy storage scheduling module 103 is configured to control the energy storage module to store or release electric energy according to the energy storage state and the AGC instruction after receiving the automatic generation control AGC instruction and when a time length from a load of the unit entering a load dead zone is less than a preset time length threshold.
The unit decentralized control module 102 is configured to adjust an operating parameter of the unit in response to an instruction of the energy storage scheduling module. The unit decentralized control module 102 is further configured to: when the unit needs to respond to the load, the unit is called to store the condensed water, the unit responds to the dispatching requirement of the load by utilizing the active frequency conversion technology of the condensing pump, and the DCS can be usually selected as a unit distributed control module.
As shown in fig. 2, a method for controlling a capacitive energy storage assisted grid-related regulation according to an embodiment of the present disclosure is applied to a system mentioned in fig. 1, and includes:
step S201, receiving an automatic generation control AGC command.
In specific implementation, after an AGC command is received, the energy storage module is controlled to store or release a computer, so that the situation that the load of the unit enters a load dead zone is solved.
The specific process is that after the power grid issues an instruction, the instruction is sent to the unit distributed control module and the energy storage scheduling module at the same time. And the unit controls the unit to output a tracking and scheduling instruction after receiving the instruction. The energy storage scheduling module monitors the power of the unit in real time, calculates the output of the energy storage module after receiving the instruction, and then quickly responds. And the energy storage dispatching 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 dispatching 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.
And S202, when the time length from the load of the unit to the load dead zone is determined to be less than a preset time length threshold value, controlling the energy storage module to store or release electric energy.
During specific implementation, the energy storage module is controlled to store or release electric energy within a period of time before the unit load enters a load dead zone, the load deviation of the unit load is monitored in real time, and the energy storage module is controlled to stop storing or releasing the electric energy when the load deviation is smaller than a preset load threshold value. And based on the load deviation, the amplitude of the electric energy stored or released by the energy storage module is corrected at any time, and the correction degree depends on the working parameters of the unit and the load deviation value.
When AGC frequency modulation is carried out, an energy storage scheduling module takes initial quick response as a main part, a system collects load deviation of a unit, and a capacitor is controlled to discharge and charge respectively aiming at the conditions of load increase or load reduction, and the charging and discharging amplitude is determined by the load deviation. With the continuation of the response process and the reduction of the load deviation, a slow exit mechanism is arranged, even if the unit still cannot meet the power grid examination output requirement after several minutes due to reasons, the unit does not respond to the adjustment process any more, and the key point is to prepare for the next response.
When the load is stabilized, the unit actively increases or decreases the output power according to the existing electric quantity of the energy storage module, and pre-charges or discharges the capacitor, so that an adjustable margin is provided for follow-up unpredictable lifting load scheduling. However, under the special working condition of continuously increasing or decreasing the load, the pre-charging or pre-discharging direction of the energy storage module can be positively adjusted by the set.
As shown in fig. 3. AGC (automatic gain control) assessment indexes of a regional power grid are respectively embodied in response time, response speed and response precision. The response time is related to the time T1-T0 when the actual load of the unit exceeds the load dead zone after the AGC command is received at the time T0, and the smaller the T1-T0, the better; the response speed is related to the AGC instruction size of the unit and the time T2-T1 from the moment that the actual load exceeds the load dead zone to the moment that the actual load enters the new load dead zone, and under the condition that the AGC instruction is fixed, the smaller the T2-T1 is, the better the AGC instruction is; the response precision is related to the integral of the deviation of the AGC command after the actual load enters a new load dead zone, and the smaller the integral value, the better.
Therefore, in the AGC response process, two different control schemes are provided on the premise of meeting the assessment indexes of the regional power grid as far as possible according to the capacity of the energy storage module configured by the unit.
In one example, as shown in fig. 4, at time T0, the unit decentralized control module and the energy storage scheduling module receive an AGC load increase instruction at the same time, and the unit decentralized control module controls the boiler and the steam turbine to cooperate to perform load response according to the original coordination system, and at the same time, the energy storage scheduling module performs its auxiliary function. At the time of T0, the energy storage scheduling module immediately sends a discharge feedforward instruction which can enable the power of the unit to rapidly rush out the load dead zone to the energy storage module after receiving the AGC instruction, so that the unit can rush out the load dead zone at the time of T1, and the response time is T2-T1 ahead of the original condition; and after the feedforward is acted, the energy storage scheduling module guides the energy storage module to slowly reduce the discharge electric quantity.
When the unit load is about to enter a new dead load zone, the energy storage scheduling module transfers the super capacitor of the energy storage module to discharge again, so that the unit load enters the new dead load zone in advance at the time of T3, the response time of the whole response process is shortened, and the response speed of the unit is indirectly improved.
In the whole AGC response process and other steady-state processes, the load deviation of the unit is collected, the energy storage module is used for controlling discharging and charging aiming at the conditions of load rising or load falling, and the charging and discharging amplitude is determined by the load deviation, so that the response precision of the unit is fundamentally improved.
In the embodiment, when the energy of the energy storage module is insufficient to assist the unit to lift the load, the AGC frequency modulation instruction with high frequency and large amplitude in the normal mode cannot provide enough energy support, and the final result of the response mode after the prospective is probably the next blank. The general judgment standard is that the power capacity of the energy storage module is less than or equal to 2% of the rated capacity of the unit, namely that the energy storage module does not meet the preset condition.
It should be noted that the preset condition may be that the power capacity of the energy storage module is greater than 2% of the rated capacity of the unit, or may be that the power capacity of the energy storage module is greater than 4% of the rated capacity of the unit, and the specific measurement standard may be changed according to an actual situation, which is not limited in the embodiment of the present disclosure.
In another example, when the energy storage module meets the preset condition, that is, the power capacity of the energy storage module is greater than 2% of the rated capacity of the unit, for an AGC frequency modulation instruction with high frequency and large amplitude in a normal mode, the energy storage module has the capability and should properly participate in a load response process, so that on one hand, AGC check indexes are optimized, on the other hand, boiler pressure is relieved, and the stability and the safety of the unit are improved.
As shown in fig. 5, at time T0, the unit decentralized control module and the energy storage scheduling module receive an AGC load increase instruction at the same time, and before accessing the large-capacity energy storage module, the set variable load rate of the unit may form a load instruction shown by line a; after the high-capacity energy storage module is connected, the machine group distributed control module optimizes the load instruction to reduce the load-up rate, as shown by a line b in the figure.
The energy storage dispatching module is driven by the load deviation of the unit and controls the capacitor to discharge (charge when the load is reduced), and the output force is determined by the load deviation.
In the whole ideal response process shown in fig. 5, the regional electric quantity enclosed by the line b and the x axis is provided by the unit, and the regional electric quantity between the line a and the line b is contributed by the energy storage module, so that the unit frequency modulation pressure is reduced remarkably.
In the control method, the setting of the variable load rate at the side of the unit distributed control module is related to the stability and safety of the unit, the working parameters of the unit are monitored in real time, such as the related parameters of main steam temperature, main steam pressure, wall temperature and the like, the amplitude of the electric energy stored or released by the energy storage module is corrected based on the working parameters, specifically, if the working parameters are stable and are in a safe range, the variable load rate of the unit distributed control module can be properly amplified, the unit mainly responds to frequency modulation through output, and even the rate which is higher than the required variable load rate can be set in the load response process to pre-charge or pre-discharge the super capacitor of the energy storage module; otherwise, if the parameter fluctuation is large or the parameter fluctuation is about to exceed the safety range, the variable load rate of the unit distributed control module is reduced, and the energy storage module mainly outputs power to ensure the stable operation of the unit.
The energy storage dispatching module is driven by the load deviation of the unit and controls the super capacitor of the energy storage module to discharge (charge when the load is reduced), and the output force is determined by the load deviation.
As shown in fig. 6, an embodiment of the present invention provides a capacitive energy storage assisted grid-related adjustment control apparatus, including:
a receiving unit 601, configured to receive an automatic generation control AGC instruction;
and the processing unit 602 is configured to control the energy storage module to store or release electric energy when it is determined that a time period from the load of the unit entering the load dead zone is less than a preset time period threshold.
In a possible implementation manner, in an apparatus provided in an embodiment of the present invention, the processing unit 602 is further configured to:
monitoring the load deviation of the unit load in real time;
and when the load deviation is smaller than a preset load threshold value, controlling the energy storage module to stop storing or releasing the electric energy.
In a possible implementation manner, in the apparatus provided in this embodiment of the present invention, the processing unit 602 is further configured to:
and when the energy storage module meets the preset condition, controlling the energy storage module to store or release electric energy.
In a possible implementation manner, in an apparatus provided in an embodiment of the present invention, the processing unit 602 is further configured to:
monitoring the load deviation of the unit load in real time;
and correcting the amplitude of the electric energy stored or released by the energy storage module based on the load deviation.
In a possible implementation manner, in an apparatus provided in an embodiment of the present invention, the processing unit 602 is further configured to:
acquiring working parameters of a unit in real time;
and modifying the amplitude of the electric energy stored or released by the energy storage module based on the working parameters.
In addition, the capacitive energy storage auxiliary grid-related adjustment control method and apparatus described in the embodiments of the present application with reference to fig. 2 to fig. 6 may be implemented by an electronic device. Fig. 7 shows a hardware structure diagram of an electronic device provided in an embodiment of the present application.
Referring now specifically to fig. 7, a schematic diagram of an electronic device 700 suitable for use in implementing embodiments of the present disclosure is shown. The electronic device shown in fig. 7 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. 7, the electronic device 700 may include a processing means (e.g., a central processing unit, a graphic processor, etc.) 701, which may perform various appropriate actions and processes according to a program stored in a Read Only Memory (ROM) 702 or a program loaded from a storage means 708 into a Random Access Memory (RAM) 703 to implement the voice control method of the embodiments as described in the present disclosure. In the RAM 703, various programs and data necessary for the operation of the electronic apparatus 700 are also stored. The processing device 701, the ROM 702, and the RAM 703 are connected to each other by a bus 704. An input/output (I/O) interface 705 is also connected to bus 704.
Generally, the following devices may be connected to the I/O interface 705: input devices 706 including, for example, a touch screen, touch pad, keyboard, mouse, camera, microphone, accelerometer, gyroscope, or the like; an output device 707 including, for example, a Liquid Crystal Display (LCD), a speaker, a vibrator, and the like; storage 708, including, for example, magnetic tape, hard disk, etc.; and a communication device 709. The communication means 709 may allow the electronic device 700 to communicate wirelessly or by wire with other devices to exchange data. While fig. 7 illustrates an electronic device 700 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 alternatively be implemented or provided.
In particular, the processes described above with reference to the flow diagrams may be implemented as computer software programs, according to embodiments of the present disclosure. 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 709, or may be installed from the storage means 708, or may be installed from the ROM 702. The computer program, when executed by the processing device 701, performs the above-described functions defined in the methods of embodiments of the present disclosure.
It should be noted that the computer readable medium of the present disclosure may 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 comprise a propagated data signal with computer readable program code embodied therein, either 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 also 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 be separate and not incorporated 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 an automatic generation control AGC instruction;
and when the time length from the load of the unit to the load dead zone is determined to be less than a preset time length threshold value, controlling the energy storage module to store or release electric energy.
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 that 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. Where 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 capacitive energy storage auxiliary grid-related adjusting system provided by the embodiment of the invention comprises:
energy storage module, unit decentralized control module and energy storage scheduling module, wherein: the energy storage module is used for storing or releasing electric energy according to the instruction of the energy storage scheduling module and feeding back an energy storage state to the energy storage scheduling module; the energy storage scheduling module is used for controlling the energy storage module to store or release electric energy according to the energy storage state and the AGC command after receiving the automatic generation control AGC command; and the unit distributed control module is used for responding to the instruction of the energy storage scheduling module and adjusting the working parameters of the unit. Compared with the prior art, the problems of unstable unit and high failure rate caused by insufficient response capability of the system during frequency disturbance and control deviation are solved, AGC (automatic gain control) assessment indexes are optimized, meanwhile, the boiler pressure is relieved, and the stability and the safety of the unit are improved.
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 the like) 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 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.
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 of these 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 (8)
1. The utility model provides a supplementary net governing system that wades of electric capacity energy storage, is applied to thermal power plant's unit, its characterized in that includes: energy storage module, unit decentralized control module and energy storage scheduling module, wherein:
the energy storage module is used for storing or releasing electric energy according to the instruction of the energy storage scheduling module and feeding back an energy storage state to the energy storage scheduling module;
the energy storage scheduling module is used for controlling the energy storage module to store or release electric energy according to the energy storage state and the AGC command after receiving an automatic generation control AGC command and when the time length from the load of the unit to a load dead zone is less than a preset time length threshold value, and controlling the energy storage module to store or release electric energy comprises the following steps: when the energy storage module meets a preset condition, controlling the energy storage module to store or release electric energy, wherein the preset condition comprises: the power capacity of the energy storage module is larger than 2% of the rated capacity of the unit;
acquiring working parameters of the unit in real time, wherein the working parameters comprise: main steam temperature, main steam pressure or wall temperature;
modifying the amplitude of the electric energy stored or released by the energy storage module based on the working parameters;
the unit decentralized control module is used for responding to the instruction of the energy storage scheduling module and adjusting the working parameters of the unit, wherein the adjusting of the working parameters of the unit comprises the following steps: the load rate is varied.
2. The system of claim 1, wherein the crew decentralized control module is further configured to: when the unit needs to respond to the load, the condensed water of the unit is called for energy storage, and the unit responds to the dispatching requirement of the load by using the condensate pump active frequency conversion technology.
3. A capacitive energy storage auxiliary grid-related regulation control method is characterized by comprising the following steps:
receiving an automatic generation control AGC instruction;
when the time length from the load of the unit to the load dead zone is determined to be less than a preset time length threshold value, controlling an energy storage module to store or release electric energy;
after receiving the automatic generation control AGC command, the method further includes:
when the energy storage module meets a preset condition, controlling the energy storage module to store or release electric energy, wherein the preset condition comprises: the power capacity of the energy storage module is more than 2 percent of the rated capacity of the unit;
acquiring working parameters of the unit in real time, wherein the working parameters comprise: main steam temperature, main steam pressure or wall temperature;
and correcting the amplitude of the electric energy stored or released by the energy storage module based on the working parameters.
4. The method of claim 3, further comprising:
monitoring the load deviation of the unit load in real time;
and when the load deviation is smaller than a preset load threshold value, controlling the energy storage module to stop storing or releasing electric energy.
5. The method of claim 3, further comprising:
monitoring the load deviation of the unit load in real time;
and correcting the amplitude of the electric energy stored or released by the energy storage module based on the load deviation.
6. The utility model provides a net regulation controlling means is waded in supplementary of capacitive energy storage which characterized in that includes:
the receiving unit is used for receiving an automatic generation control AGC instruction;
the processing unit is used for controlling the energy storage module to store or release electric energy when the time length from the load of the unit to enter the load dead zone is smaller than a preset time length threshold value; the processing unit is further configured to: when the energy storage module meets a preset condition, controlling the energy storage module to store or release electric energy, wherein the preset condition comprises: the power capacity of the energy storage module is more than 2 percent of the rated capacity of the unit;
acquiring working parameters of the unit in real time, wherein the working parameters comprise: main steam temperature, main steam pressure or wall temperature;
and correcting the amplitude of the electric energy stored or released by the energy storage module based on the working parameters.
7. 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 capacitive energy storage assisted grid-related regulation control method of any of claims 3 to 5.
8. A computer storage medium having instructions which, when executed by a processor of an electronic device, enable the electronic device to perform a capacitive energy storage assisted grid-tied regulation control method as claimed in any one of claims 3 to 5.
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