Nomum storage and energy storage phase modulation control method and system

Abstract

The invention provides a noon storage and energy storage phase modulation control method and system, an energy conversion network unit switches and enables a first power unit and a second power unit, and during power storage, a motor absorbs active power from a power grid, drags the first power unit to do work, and drives the first power unit to realize conversion and storage of electric energy-mechanical energy-heat energy; meanwhile, by adjusting the exciting current of the motor, the motor works in a late-phase or in-phase state, reactive power is provided for the power grid, and the second control subunit is adjusted, so that the generator is off-line and operates in a synchronous phase modifier mode. During power generation, the second control subunit connects the generator to the system, drives the second power unit to do work, adjusts the excitation current of the generator, enables the generator to work in a late phase or leading phase state, provides reactive power for a power grid, adjusts the first control subunit, enables the motor to be off-line and operates in a synchronous phase modifier mode. Therefore, the energy storage and storage system has excellent phase modulation and inertia supporting capabilities through a phase modulation control system, and has wide applicability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric machines and appliances, and particularly relates to a storage energy and phase modulation control method and system. BACKGROUND

[0002] Large-scale new energy and DC cross-region power transmission replace part of the traditional power grid units. The limitations of new energy power sources are small equivalent inertia, weak frequency modulation capability, weak voltage support performance, and insufficient system stability. This will cause the frequency dynamic response of the power system to be severe when it is subjected to horizontal power disturbance, the frequency deviation amplitude increases, the frequency change rate increases, and the system frequency recovery time is lengthened. Therefore, improving the inertia support and frequency regulation capability of new energy and energy storage is helpful to improve the stability of the power system.

[0003] It should be noted that the above introduction to the technical background is only for the convenience of clearly and completely describing the technical scheme of the present application and for the convenience of understanding by those skilled in the art. The above technical scheme cannot be considered as known to those skilled in the art only because it is described in the background section of the present application. SUMMARY

[0004] The present application provides a storage energy and phase modulation control method and system.

[0005] The first aspect of the present application provides a storage energy and phase modulation control system, comprising:

[0006] The electric motor is connected to the bus, absorbs active power from the power grid, and provides reactive power to the power grid by operating in a lagging phase or an advancing phase state. The first power unit is axially connected to the electric motor and generates energy for storage by doing work on air based on the driving of the electric motor. The energy storage and conversion network unit is connected to the first power unit and is used for energy storage or release operation. If the storage energy and phase modulation control system absorbs power from the power grid, the energy storage and conversion network unit stores energy. If the storage energy and phase modulation control system sends power to the power grid, the energy storage and conversion network unit releases energy. The second power unit is connected to the energy storage and conversion network unit and is used to absorb the energy stored in the energy storage and conversion network unit. The generator is connected between the second power unit and the bus, sends active power to the power grid, and provides reactive power to the power grid by operating in a lagging phase or an advancing phase state.

[0007] The second aspect of the present application provides a storage energy and phase modulation control method, which is applicable to the storage energy and phase modulation control system provided in the first aspect of the present application, comprising:

[0008] In response to the power storage working condition, the motor absorbs active power from the power grid according to the power storage working condition, drives the first power unit to work, and drives the first power unit to realize conversion and storage of electric energy-mechanical energy-thermal energy; the motor is caused to work in a lagging phase or an advancing phase state based on adjustment of the excitation current of the motor, so as to provide reactive power to the power grid; the generator is caused to be offline and to operate in a synchronous condenser mode based on adjustment of the second control subunit;

[0009] In response to the standby working condition, the motor is caused to be offline based on adjustment of the first control subunit according to the standby working condition, and the motor is caused to be grid-connected according to a static frequency conversion start; the motor is caused to provide reactive power to the power grid and the generator is caused to operate in a synchronous condenser mode based on adjustment of the excitation current of the grid-connected motor;

[0010] In response to the power generation working condition, the generator is connected to the system and drives the second power unit to work based on the second control subunit according to the power generation working condition; the generator is caused to work in a lagging phase or an advancing phase state based on adjustment of the excitation current of the generator, so as to provide reactive power to the power grid; the motor is caused to be offline and to operate in a synchronous condenser mode based on adjustment of the first control subunit.

[0011] The third aspect of the present application provides an electronic device, including: a processor; a memory for storing instructions executable by the processor; wherein the processor is configured to execute the instructions to implement the energy storage and phase modulation control method of the second aspect of the present application.

[0012] The fourth aspect of the present application provides a non-transitory computer-readable storage medium, when the instructions in the storage medium are executed by the processor of the electronic device, the electronic device can execute the method of the second aspect of the present application.

[0013] The fifth aspect of the present application provides a computer program product, including a computer program, when the computer program is executed by the processor in the communication device, the method of the second aspect of the present application is realized.

[0014] The embodiments of the present application provide at least the following beneficial effects:

[0015] The first power unit and the second power unit are switched by the transduction network unit, when storing electricity, the motor absorbs active power from the power grid, drives the first power unit to work, drives the first power unit to realize the conversion of electric energy-mechanical energy-thermal energy and storage, at the same time, the motor works in the lagging phase or the leading phase state by adjusting the excitation current of the motor, provides the reactive power to the power grid, adjusts the second control subunit, and makes the generator off-line and runs in the synchronous phase modifier mode. When generating electricity, the generator is connected to the system by the second control subunit, drives the second power unit to work, adjusts the excitation current of the generator, makes the generator work in the lagging phase or the leading phase state, provides the reactive power to the power grid, adjusts the first control subunit, and makes the motor off-line and runs in the synchronous phase modifier mode. Therefore, the storage energy has excellent phase modulation and inertia support capability through the phase modulation control system, and has wide applicability.

[0016] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0017] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description, taken in conjunction with the accompanying drawings, in which:

[0018] Figure 1 A first structural schematic diagram of a storage energy phase modulation control system provided by an embodiment of the present application;

[0019] Figure 2 A second structural schematic diagram of a storage energy phase modulation control system provided by an embodiment of the present application;

[0020] Figure 3 A third structural schematic diagram of a storage energy phase modulation control system provided by an embodiment of the present application;

[0021] Figure 4 A fourth structural schematic diagram of a storage energy phase modulation control system provided by an embodiment of the present application;

[0022] Figure 5 A flowchart of a storage energy phase modulation control method provided by an embodiment of the present application;

[0023] Figure 6 A structural schematic diagram of an electronic device according to an embodiment of the present application;

[0024] Figure 7 A structural schematic diagram of an electronic device according to an embodiment of the present application. DETAILED DESCRIPTION

[0025] The exemplary embodiments will be described in detail herein with reference to the attached drawings. The description of the embodiments is intended to be illustrative, and not to be limiting. Many modifications and variations of the illustrative embodiments can be possible without departing from the scope of the embodiments of the present application.

[0026] The terminology used in the description of the embodiments herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the embodiments of the present application. As used in the description of the embodiments and the appended claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It also will be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0027] It will be understood that, although the terms first, second, third, etc. can be used herein to describe various information, these terms are not intended to denote a particular order or hierarchy among the information. These terms are used only to distinguish one from another. For example, a first information can be termed a second information, and, similarly, a second information can be termed a first information, without departing from the scope of the present embodiments. As used herein, the words "if" and "when" can be interpreted to mean "upon" or "in response to determining" depending on the context.

[0028] The embodiments of the present application are described in detail below with reference to the attached drawings, which show, by way of example, the embodiments of the present application. The embodiments described below are examples for explaining the present application and are not intended to limit the present application.

[0029] The existing way to improve the inertia support and frequency regulation capability of new energy and energy storage includes: an adiabatic compressed air energy storage power generation system and a pre-packaged phase modifier system. Specifically, the adiabatic compressed air energy storage power generation system includes an energy storage subsystem and a control module. Specifically, the energy storage subsystem includes a gas storage module, a multi-stage heat storage module and a power generation module. The gas storage module is used to receive air; the power generation module generates power by working on the air; and the multi-stage heat storage module is connected with the power generation module and is used to exchange heat during the working process. Further, the power generation module is provided with a fully controlled excitation unit, through which a channel for reactive power regulation can be provided. However, the adiabatic compressed air energy storage power generation system includes the gas storage module and the multi-stage heat storage module, which makes the system structure too complex, and the adiabatic compressed air energy storage power generation system is not suitable for being provided with a compressor. The compressor has the advantages of long service life, small size, light weight, continuous and stable gas transmission, high reliability, etc.

[0030] The pre-installed synchronous condenser system includes: a synchronous condenser body, a synchronous condenser spindle, a load-bearing device, a support plate, a push assembly, a rotation mechanism, and a balancing mechanism. The connection between the synchronous condenser spindle and the synchronous condenser body is flexible and easy to disassemble. The load-bearing device supports the components; the support plate supports the devices; the push assembly enables the support plate to move linearly in the horizontal direction; the rotation mechanism drives the synchronous condenser spindle to rotate horizontally; and the balancing mechanism ensures the synchronous condenser is in a horizontally balanced state. This pre-installed synchronous condenser system can improve the inertia support of new energy sources and energy storage; however, the system is too expensive and requires a huge amount of maintenance.

[0031] Therefore, this application provides a method and system for phase modulation control of energy storage.

[0032] The following describes the energy storage phase modulation control method and system of this application with reference to the accompanying drawings.

[0033] Figure 1 This is a first structural schematic diagram of a storage-based energy storage phase modulation control system provided in an embodiment of this application. Figure 2 This is a schematic diagram of the second structure of a storage energy phase modulation control system provided in an embodiment of this application. Figure 3 This is a third structural schematic diagram of a phase modulation control system for energy storage provided in an embodiment of this application. Figure 4 This is a fourth structural schematic diagram of a phase-modulation control system for energy storage provided in an embodiment of this application. Figures 1 to 4 As shown, the energy storage phase modulation control system includes, but is not limited to, the following components:

[0034] An electric motor, connected to the bus, absorbs active power from the power grid and provides reactive power to the grid by operating in a lagging or leading phase state. It should be noted that the losses incurred by the motor during operation due to coil heating and bearing friction are called motor losses. The sum of the motor's rated power and losses is called the active power absorbed by the motor from the grid. By adjusting its operating current (usually the excitation current), the motor can operate in a lagging phase (lagging phase operation refers to the motor's excitation system being in an over-excitation state, supplying both active and reactive power to the system, with a positive power factor; this operating state is called lagging operation, also known as phase-delay operation) or a leading phase (leading phase operation involves reducing the motor's excitation current, decreasing the motor's electromotive force, causing the power factor angle to lead, and the motor's load current to generate an armature-assisted reaction, allowing the generator to supply active power to the system while absorbing reactive power), providing inductive or capacitive reactive power to the grid, thus enabling the system to have phase-adjusting capabilities.

[0035] Further, the phase modulation refers to a running state of the motor not emitting active power, but only used to transmit inductive reactive power to the power grid, thereby playing a role of adjusting system reactive power and maintaining system voltage level. The leading phase operation of the motor refers to that, in the running process of the power system, if the reactive power is excessive, the voltage of the system will be raised, affecting the normal operation of the system, at this time, the generator needs to be adjusted to the leading phase operation state to emit active power to absorb reactive power, thereby playing a role of reducing the voltage of the system and making it in a stable running state.

[0036] As shown in Figure 1 and Figure 2 , the storage energy modulation control system further comprises a first power unit, the first power unit is connected with the motor in an axial direction, and the first power unit generates energy for storage based on the driving of the motor to work on air, wherein the stored energy can be mechanical energy.

[0037] Optionally, as an example, as shown in Figure 1 and Figure 2 , the first power unit comprises one or two first control sub-units, a high-temperature compressor and a low-temperature turbine, wherein the first control sub-unit adjusts the rotating speed of the motor, the rotating speed of the high-temperature compressor and the rotating speed of the low-temperature turbine, and if the number of the first control sub-units is one, the first control sub-unit is connected with the motor, the high-temperature compressor is connected with the first control sub-unit, and the low-temperature turbine is connected with the high-temperature compressor; if the number of the first control sub-units is two, one first control sub-unit is arranged between the high-temperature compressor and the motor, and the other first control sub-unit is arranged between the low-temperature turbine and the motor. It should be noted that the compressor is a mechanical device that helps to increase the pressure of the gas, and mechanical energy needs to be input to convert into internal energy of the gas. However, not all processes are pressure increasing operations, for some high-pressure reactors, the reaction products often reduce the pressure when they are subjected to subsequent separation treatment, and when the gas is decompressed, the internal energy of the fluid will be lost, so a device for converting internal energy into mechanical energy is arranged, which is usually a turbine. In summary, the compressor increases the pressure while the volume of the fluid decreases, and the turbine reduces the pressure while the volume of the fluid increases. Further, the first control sub-unit comprises a clutch and a hydraulic coupler. The clutch plays a role of separation and closure, and can adjust the rotating speed relationship between the low-temperature turbine and the motor.

[0038] The hydraulic coupling is a non-rigid coupling with liquid as working medium. The pump wheel and turbine of the hydraulic coupling form a closed working cavity for circulating flow of liquid. The pump wheel is mounted on the input shaft and the turbine is mounted on the output shaft. The two wheels are semi-circular rings with a plurality of blades arranged in the radial direction. They are arranged in a facing coupling manner without contact and with a gap of 3-4 mm in the middle, and form a circular annular working wheel. The driving wheel is called the pump wheel, the driven wheel is called the turbine, and both the pump wheel and the turbine are called the working wheel. After the pump wheel and the turbine are combined, an annular cavity is formed, which is filled with working oil. The pump wheel is usually driven to rotate by an internal combustion engine or an electric motor. The blades drive the oil, which is thrown to the edge of the pump wheel blade under the action of centrifugal force. Since the radii of the pump wheel and the turbine are equal, when the rotational speed of the pump wheel is greater than that of the turbine, the hydraulic pressure at the outer edge of the pump wheel blade is greater than that at the outer edge of the turbine blade. Due to the pressure difference, the liquid impacts the turbine blade. When the external resistance is overcome, the turbine begins to rotate, that is, the kinetic energy is transmitted to the turbine, so that the turbine rotates in the same direction as the pump wheel. The kinetic energy of the oil drops from the edge of the turbine blade to the pump wheel, forming a circulating loop, and the flow path is like a circular spiral connected at the head and tail. The hydraulic coupling transmits torque by changing the moment of momentum generated by the interaction of liquid and the blades of the pump wheel and the turbine. When the wind loss and other mechanical losses during rotation of the impeller are ignored, the output (turbine) torque is equal to the input (pump wheel) torque. Similarly, the hydraulic coupling can adjust the speed relationship between the low-temperature turbine and the electric motor.

[0039] As shown in Figure 3 and Figure 4 , the energy storage and phase modulation control system further comprises a second power unit and a generator. The second power unit is connected to the transduction network and is used to absorb the energy stored in the transduction network unit. The generator is connected between the second power unit and the bus, sends active power to the power grid, and provides reactive power to the power grid by operating in a lagging or leading phase state.

[0040] Optionally, as an example, as shown in Figure 3 and Figure 4 , the second power unit includes one or two second control sub-units, a low-temperature compressor, and a high-temperature turbine. The second control sub-unit adjusts the speed of the generator, the speed of the low-temperature compressor, and the speed of the high-temperature turbine. If the number of second control sub-units is one, the second control sub-unit is connected to the generator, the high-temperature turbine is connected to the second control sub-unit, and the low-temperature compressor is connected to the high-temperature turbine. If the number of second control sub-units is two, one second control sub-unit is connected between the low-temperature compressor and the generator, and the other second control sub-unit is connected between the high-temperature turbine and the generator. Further, the second control sub-unit includes a clutch and a hydraulic coupling. The low-temperature compressor converts input mechanical energy into internal energy of gas, and the high-temperature turbine converts internal energy into mechanical energy.

[0041] As shown in Figures 1 to 4 , the energy storage and phase modulation control system further comprises a transduction network unit, the energy storage transduction network unit is connected with the first power unit and the second power unit, and is used for storing or releasing energy, wherein, if the energy storage and phase modulation control system absorbs power from the power grid, the transduction network unit stores energy; if the energy storage and phase modulation control system sends power to the power grid, the transduction network unit releases energy.

[0042] Optionally, as an example, the transduction network unit switches the first power unit and the second power unit, wherein, if the energy storage and phase modulation control system absorbs power from the power grid, the transduction network unit and the first power unit are in open communication, the transduction network unit and the second power unit are in closed communication, and the transduction network unit stores energy; if the energy storage and phase modulation control system sends power to the power grid, the transduction network unit and the first power unit are in closed communication, the transduction network unit and the second power unit are in open communication, and the transduction network unit releases energy. Further, the transduction network unit comprises a first transduction subunit and a second transduction subunit, wherein the first transduction subunit switches the first power unit and the second power unit in communication, and stores or releases heated energy. Further, the first transduction subunit comprises a high-temperature heat storage tank, a low-temperature heat storage tank and a high-temperature heat exchanger, wherein the high-temperature heat exchanger switches the first power unit and the second power unit in communication; the high-temperature heat storage tank and the low-temperature heat storage tank are connected with the high-temperature heat exchanger. Further, the second transduction subunit switches the first power unit and the second power unit in communication, and stores or releases cooled energy. Further, the second transduction subunit comprises a high-temperature cold storage tank, a low-temperature cold storage tank and a low-temperature heat exchanger, wherein the low-temperature heat exchanger switches the first power unit and the second power unit in communication; the high-temperature cold storage tank and the low-temperature cold storage tank are connected with the low-temperature heat exchanger.

[0043] It should be noted that, as shown in Figure 1 and Figure 2 , the motor is coaxial with the high-temperature compressor and the low-temperature turbine, the motor is connected with the first control subunit through a shaft, the first control subunit is connected with the high-temperature compressor, the motor drives the high-temperature compressor and the low-temperature turbine to rotate, the outlet of the high-temperature compressor is connected with the inlet of the high-temperature heat exchanger, and the outlet of the high-temperature heat exchanger is connected with the low-temperature turbine. After the air is compressed by the high-temperature compressor, it is cooled by the high-temperature heat exchanger, the heat exchanged is stored in the high-temperature heat storage tank, the cooled air enters the low-temperature turbine to expand, the cold energy is extracted by the low-temperature heat exchanger and stored in the low-temperature cold storage tank, and returns to the inlet of the high-temperature compressor to complete a cycle. The first control subunit can adjust the speed between the low-temperature turbine and the motor.

[0044] As shown in Figure 3 andFigure 4 As shown, the generator is coaxial with the low-temperature compressor and the high-temperature turbine, the high-temperature turbine is connected to the second control subunit through a shaft, and the second control subunit is connected to the generator through a shaft. The generator operates in a motor mode to drive the high-temperature turbine and the low-temperature compressor to rotate. The outlet of the low-temperature compressor is connected to the inlet of the high-temperature heat exchanger, and the outlet of the high-temperature heat exchanger is connected to the high-temperature turbine. After the air is compressed by the low-temperature compressor, it is heated by the high-temperature heater to absorb the energy stored in the high-temperature heat storage tank. The high-temperature and high-pressure air enters the high-temperature turbine to expand, is cooled by the low-temperature heat exchanger to absorb the cold energy in the low-temperature heat storage tank, and returns to the inlet of the low-temperature compressor to complete a cycle. The second control subunit can adjust the rotational speed between the high-temperature turbine and the generator.

[0045] In summary, the first power unit and the second power unit are switched by the transduction network unit. In the power storage mode, the motor absorbs active power from the power grid to drive the first power unit to work, and the first power unit converts electrical energy into mechanical energy and heat energy. At the same time, the motor is adjusted to work in a lagging or leading phase state to provide reactive power to the power grid. The second control subunit is adjusted to disconnect the generator from the system and operate in a synchronous phase modifier mode. In the power generation mode, the generator is connected to the system by the second control subunit to drive the second power unit to work. The generator is adjusted to work in a lagging or leading phase state to provide reactive power to the power grid. The first control subunit is adjusted to disconnect the motor from the system and operate in a synchronous phase modifier mode. Thus, the storage energy control system has excellent phase modulation and inertia support capabilities, and has wide applicability.

[0046] Figure 5 A flowchart of a storage energy phase modulation control method provided by an embodiment of the present application is shown in FIG. 6. As shown in FIG. 6, the method is applicable to the storage energy phase modulation control system provided by the embodiment of the present application. The storage energy phase modulation control method includes but is not limited to the following steps: Figure 5

[0047] S501, in response to the power storage condition, the motor absorbs active power from the power grid to drive the first power unit to work, and the first power unit converts electrical energy into mechanical energy and heat energy. Based on the adjustment of the excitation current of the motor, the motor works in a lagging or leading phase state to provide reactive power to the power grid. Based on the adjustment of the second control subunit, the generator is disconnected from the system and operates in a synchronous phase modifier mode.

[0048] ​It should be noted that the power storage working condition is that the motor and the first power unit are put into operation, and the first power unit is connected to the transduction network unit. The motor obtains active power from the power grid, and the excitation current of the motor is adjusted, so that the motor can work in a lagging phase or an advancing phase state, so that the motor can provide inductive or capacitive reactive power to the power grid, and thus the motor has the ability to regulate the phase. The second control subunit disconnects the generator, the second power unit and the transduction network unit, and the generator can be started through the static frequency converter (full name Static Frequency Convertor, abbreviated as SFC, and the detailed performance of SFC will not be described here), and when the speed of the generator reaches the requirement of the power grid (for example, the speed of the generator required by the power grid can be 3000 revolutions per minute, which can also be called synchronous speed state), the generator is connected to the grid. After being connected to the grid, the excitation device of the generator can also be adjusted to provide reactive power to the power grid.

[0049] S502, in response to the standby working condition, based on the adjustment of the first control subunit, the motor is disconnected and connected to the grid according to the static frequency start; based on the adjustment of the excitation current of the motor connected to the grid, the motor provides reactive power to the power grid, and the generator operates in the synchronous phase regulator mode.

[0050] It should be noted that in the standby working condition, the first control subunit is adjusted to disconnect the motor from the first power unit at the turning speed, and the first power unit is disconnected from the transduction network unit. The motor can be started through the static frequency converter, and when the speed of the motor reaches the requirement of the power grid, the motor is connected to the grid. After being connected to the grid, the excitation device of the motor can also be adjusted to provide reactive power to the power grid, and at the same time, the generator can also be kept to provide reactive power to the power grid.

[0051] S503, in response to the power generation working condition, based on the second control subunit, the generator is connected to the system and drives the second power unit to work; based on the adjustment of the excitation current of the generator, the generator works in a lagging phase or an advancing phase state to provide reactive power to the power grid; based on the adjustment of the first control subunit, the motor is disconnected and operates in the synchronous phase regulator mode.

[0052] It should be noted that in the power generation working condition, the second control subunit is adjusted to connect the generator to the second power unit at the turning speed, and the second power unit is connected to the transduction network unit. By adjusting the excitation current of the generator, the generator works in a lagging phase or an advancing phase state, so as to provide inductive or capacitive reactive power to the power grid, and thus the generator has the ability to regulate the phase, and at the same time, the motor can also be kept to work in a lagging phase or an advancing phase state.

[0053] In summary, the first power unit and the second power unit are switched by the transduction network unit, when storing electricity, the motor absorbs active power from the power grid, drives the first power unit to work, drives the first power unit to realize the conversion of electric energy-mechanical energy-thermal energy and storage, at the same time, the motor works in the lagging or leading phase state by adjusting the excitation current of the motor, provides reactive power to the power grid, adjusts the second control subunit, and makes the generator off-line and runs in the synchronous phase modifier mode. When generating electricity, the generator is connected to the system by the second control subunit, drives the second power unit to work, adjusts the excitation current of the generator, makes the generator work in the lagging or leading phase state, provides reactive power to the power grid, adjusts the first control subunit, and makes the motor off-line and runs in the synchronous phase modifier mode. Therefore, the storage energy has excellent phase modulation and inertia support capability through the phase modulation control system, and has wide applicability.

[0054] Figure 6 An electronic device block diagram is shown according to an exemplary embodiment. Figure 6 The electronic device shown is merely an example, and should not impose any limitation on the functions and use range of the embodiments of the present application.

[0055] As shown in Figure 6 The electronic device 600 includes a processor 601, which can perform various appropriate actions and processes according to programs stored in a read only memory (ROM, Read Only Memory) 602 or loaded from the storage 1006 to a random access memory (RAM, Random Access Memory) 603. In the RAM 603, various programs and data required for the operation of the electronic device 600 are also stored. The processor 601, the ROM 602, and the RAM 603 are connected to each other through a bus 604. An input / output (I / O, Input / Output) interface 605 is also connected to the bus 604.

[0056] The following components are connected to the I / O interface 605: a storage 606 including a hard disk or the like; and a communication part 607 including a network interface card such as a LAN (Local Area Network) card, a modem, or the like, which performs communication processing via a network such as the Internet; and a drive 608 is also connected to the I / O interface 605 as needed.

[0057] In particular, according to embodiments of the present application, the processes described above with reference to the flowcharts can be implemented as a computer software program. For example, embodiments of the present application include a computer program carried on a computer readable medium, the computer program containing program code for performing the methods illustrated by the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network by the communication section 607. When the computer program is executed by the processor 601, the above-described functions defined in the methods of the present application are performed.

[0058] In exemplary embodiments, a storage medium including instructions, such as a memory including instructions, is also provided, which can be executed by the processor 601 of the electronic device 600 to complete the above-described methods. Alternatively, the storage medium can be a non-transitory computer readable storage medium, such as a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, and an optical data storage device, etc.

[0059] In the present application, the computer readable storage medium can be any tangible medium that contains or stores a program that can be used by or in connection with an instruction execution system, apparatus, or device. In the present application, the computer readable signal medium can include a data signal that propagates in a baseband or as part of a carrier wave, in which the computer readable program code is carried. Such a propagated data signal can take a variety of forms, including but not limited to electro-magnetic, optical, or any suitable combination thereof. The computer readable signal medium can also be any computer readable medium that is not a storage medium and that can communicate, propagate, or transport program for use by or in connection with an instruction execution system, apparatus, or device. Program code contained on a computer readable medium can be transmitted by any suitable medium, including but not limited to wireless, wire line, optical fiber cable, RF, etc., or any suitable combination thereof.

[0060] Figure 7 is a structural block diagram of an electronic device according to an exemplary embodiment. Figure 7 The electronic device shown is only an example and should not bring any limitation to the functions and use range of the embodiments of the present application. As Figure 7 As shown, the electronic device 700 includes a processor 701 and a memory 702. The memory 702 is used to store program code, and the processor 701 is connected with the memory 702 and used to read the program code from the memory 702 to implement the above-mentioned energy storage phase modulation control method in the embodiments.

[0061] Alternatively, the number of processors 701 can be one or more.

[0062] Optionally, the electronic device can further include an interface 703, the number of which can be plural. The interface 703 can be connected with the application and can receive data of an external device such as a sensor, etc.

[0063] Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. It is intended that the specification and examples be considered as exemplary only, with the true scope and spirit of the application being indicated by the following claims.

[0064] It is to be understood that the application is not limited to the precise details of design described above and illustrated in the drawings. Various modifications and changes can be made without departing from the scope of the application. The scope of the application is indicated by the appended claims, rather than by the foregoing description.

Claims

1. A storage-based energy storage phase regulation control system, characterized in that, include: An electric motor, which is connected to the bus, absorbs active power from the power grid and provides reactive power to the power grid by operating in a lagging or leading phase state; The first power unit is axially connected to the electric motor and performs work on the air based on the drive of the electric motor to generate energy for storage. The energy conversion network unit is connected to the first power unit and is used to store or release energy. Specifically, when the energy storage phase modulation control system absorbs power from the grid, the energy conversion network unit stores the energy; when the energy storage phase modulation control system sends power to the grid, the energy conversion network unit releases the energy. The second power unit is connected to the energy conversion network and is used to absorb the energy stored in the energy conversion network unit. The generator is connected between the second power unit and the bus to send active power to the grid and to provide reactive power to the grid by operating in a lagging or leading phase state.

2. The energy storage phase regulation control system according to claim 1, characterized in that, The first power unit includes one or two first control subunits, a high-temperature compressor, and a low-temperature turbine. The first control subunit adjusts the speed of the electric motor, the speed of the high-temperature compressor, and the speed of the low-temperature turbine. If there is only one first control subunit, the first control subunit is connected to the electric motor, the high-temperature compressor is connected to the first control subunit, and the low-temperature turbine is connected to the high-temperature compressor. If there are two first control subunits, one first control subunit is connected between the high-temperature compressor and the electric motor, and the other first control subunit is connected between the low-temperature turbine and the electric motor.

3. The energy storage and phase regulation control system according to claim 2, characterized in that, The first control subunit includes a clutch and a hydraulic coupling.

4. The energy storage and phase regulation control system according to claim 1, characterized in that, The second power unit includes one or two second control subunits, a cryogenic compressor, and a high-temperature turbine. The second control subunit adjusts the speed of the generator, the speed of the cryogenic compressor, and the speed of the high-temperature turbine. If there is only one second control subunit, the second control subunit is connected to the generator, the high-temperature turbine is connected to the second control subunit, and the cryogenic compressor is connected to the high-temperature turbine. If there are two second control subunits, one second control subunit is connected between the cryogenic compressor and the generator, and the other second control subunit is connected between the high-temperature turbine and the generator.

5. The energy storage and phase regulation control system according to claim 4, characterized in that, The second control subunit includes a clutch and a hydraulic coupling.

6. The energy storage phase regulation control system according to any one of claims 1-5, characterized in that, The energy conversion network unit switches between enabling the first power unit and the second power unit. Specifically, when the energy storage phase regulation control system absorbs power from the grid, the energy conversion network unit and the first power unit are connected, while the energy conversion network unit and the second power unit are disconnected, and the energy conversion network unit stores energy. When the energy storage phase regulation control system sends power to the grid, the energy conversion network unit and the first power unit are disconnected, while the energy conversion network unit and the second power unit are connected, and the energy conversion network unit releases energy.

7. The energy storage phase regulation control system according to claim 6, characterized in that, The energy transducer network unit includes a first energy transducer subunit and a second energy transducer subunit. The first energy transducer subunit switches between the first power unit and the second power unit and stores or releases the heating energy. The second energy transducer subunit switches between the first power unit and the second power unit and stores or releases the cooling energy.

8. The energy storage phase regulation control system according to claim 7, characterized in that, The first energy transducer subunit includes a high-temperature heat storage tank, a low-temperature heat storage tank, and a high-temperature heat exchanger, wherein the high-temperature heat exchanger switches between the first power unit and the second power unit; both the high-temperature heat storage tank and the low-temperature heat storage tank are connected to the high-temperature heat exchanger.

9. The energy storage phase regulation control system according to claim 8, characterized in that, The second transducer subunit includes a high-temperature cold storage tank, a low-temperature cold storage tank, and a low-temperature heat exchanger, wherein the low-temperature heat exchanger switches between the first power unit and the second power unit; both the high-temperature cold storage tank and the low-temperature cold storage tank are connected to the low-temperature heat exchanger.

10. A method for phase modulation control of energy storage, characterized in that, The energy storage phase regulation control system applicable to any one of claims 1-9 includes: In response to the energy storage condition, the motor absorbs active power from the grid, drives the first power unit to do work, and drives the first power unit to realize the conversion and storage of electrical energy-mechanical energy-thermal energy; based on the adjustment of the excitation current of the motor, the motor is made to work in a lagging or leading phase state to provide reactive power to the grid; based on the adjustment of the second control subunit, the generator is taken offline and operates in synchronous condenser mode. In response to the standby condition, based on the adjustment of the first control subunit, the motor is taken offline and connected to the grid according to the static frequency converter start-up; based on the adjustment of the excitation current of the grid-connected motor, the motor provides reactive power to the grid and the generator operates in synchronous condenser mode. In response to the power generation condition, based on the second control subunit, the generator is connected to the system and drives the second power unit to work; based on the adjustment of the generator's excitation current, the generator is made to operate in a lagging or leading phase state to provide reactive power to the grid; based on the adjustment of the first control subunit, the motor is taken offline and operates in synchronous condenser mode.

Images