Power grid frequency modulation device

Abstract

The invention relates to the technical field of power grid frequency modulation, in particular to a power grid frequency modulation device which comprises an AGC control frequency modulation module, a frequency difference signal unit and a variable gain amplifier. The AGC frequency modulation control module is used for predicting intensity change information of an input signal of the frequency difference signal unit based on historical frequency difference data and real-time frequency difference data of the frequency difference signal unit, and generating a frequency modulation instruction based on the intensity change information; the adaptive filter is used for responding to the frequency modulation instruction to adjust a filter coefficient; and the variable gain amplifier is electrically connected with the self-adaptive filter and is used for dynamically adjusting the gain amplification factor according to the filter coefficient adjusted by the self-adaptive filter. The feedback type AGC circuit system composed of the AGC control frequency modulation module, the variable gain amplifier, the electrically controlled attenuator and the like is used for carrying out frequency modulation on the power grid, so that the frequency modulation efficiency of the power grid is higher.

Description

Technical Field

[0001] The present application relates to the technical field of power grid frequency regulation, and specifically to a power grid frequency regulation device. Background Art

[0002] The frequency regulation of the power system is mainly ensured by primary frequency regulation and secondary frequency regulation to ensure the frequency stability of the power grid. The primary frequency regulation is the unit speed regulator and load characteristics absorbing the high-frequency and low-amplitude load fluctuations of the power grid to reduce frequency fluctuations. The regulation time is from seconds to minutes and is differential regulation. The secondary frequency regulation is the AGC control frequency regulation unit responding to the frequency regulation command to smooth the regional control deviation. It mainly responds to load fluctuations with large fluctuations. The regulation time is in minutes and is non-differential regulation. The charging and discharging time in the primary and secondary frequency regulation instructions of the power grid is short, and the conversion between the two is frequent. Therefore, it is necessary to select the battery energy storage type that should meet the frequency regulation requirements according to the characteristics of the power grid frequency regulation. The low cycle life and high cost have become the main bottlenecks restricting the large-scale application of lithium iron phosphate batteries at this stage; lithium titanate batteries are non-flammable and non-explosive and have extremely high safety, but their construction costs are high, and the high investment costs limit their large-scale development; sodium-sulfur batteries require high-temperature dissolution of sodium and sulfur during the charging and discharging process. Improper control may cause the battery to spontaneously combust and explode, and the safety is relatively low; all-vanadium liquid flow batteries generally operate between 5°C and 45°C, have a long cycle life, but have low energy density and occupy a large area.

[0003] At present, most of them are PID control frequency modulation. Although the stability of classic PID is not small, the margin of good dynamic quality is not large. The closed-loop dynamic quality is very sensitive to the change of PID gain. Therefore, when the controlled object is in a frequently changing environment, it is necessary to adjust the PID gain according to the change of the environment. The essence of the classic PD controller is "to eliminate the error by error feedback", but the error between this direct target and the actual behavior is not completely reasonable, because the system output has a certain inertia and it is impossible to jump. The target value is given by the system outside and can jump. Directly using the error between them to eliminate the error means that the amount that cannot jump is used to track the amount that can jump, which is obviously not reasonable. This method of "eliminating the error by the error between the direct target and the actual behavior" often causes the initial control force to be too large and the system behavior to overshoot. This is also the main reason for the contradiction between "rapidity" and "overshoot" in the closed-loop system of PID control.

[0004] To solve the above problems, the invention patent with announcement number CN108173278B discloses a DC voltage control device, method and optimization method for new energy VSG frequency modulation. The control of grid fluctuations in the VSC-HVDC system does not specifically optimize the problem of frequent charging, discharging and conversion in grid frequency modulation. Moreover, the solution does not fully consider the application limitations of different battery energy storage technologies in actual grid frequency modulation, such as cycle life, safety and cost.

[0005] The invention patent with announcement number CN107069789B discloses a control strategy for energy storage systems for grid AGC frequency modulation. From the perspective of grid AGC frequency modulation control, taking into account the safety factors within the battery energy storage operation cycle, considering the capacity and power constraints of the energy storage system, the energy storage system is managed, and the charging and discharging frequency modulation power of the energy storage system is determined based on the SOC hierarchical control strategy. However, its control strategy may be too dependent on fixed parameters and lack dynamic adaptability to the actual operating conditions of the grid, which is particularly important in grid frequency modulation because the load and frequency fluctuations of the grid are dynamically changing.

[0006] Therefore, how to improve the dynamic adaptability of grid frequency regulation to cope with the dynamic changes of grid load and frequency, improve the existing control strategy, reduce the dependence on gain, improve the robustness and adaptability of the control system, reduce overshoot and improve the rapidity of the system have become technical problems that need to be solved. Summary of the invention

[0007] In view of this, the present application provides a power grid frequency regulation device to solve the above problems.

[0008] To achieve the above objectives, this application provides the following technical solutions:

[0009] A power grid frequency modulation device, comprising a power grid frequency modulation control component, wherein the power grid frequency modulation control component comprises an AGC control frequency modulation module, a frequency difference signal unit, an adaptive filter and a variable gain amplifier;

[0010] The AGC control frequency modulation module is used to predict the intensity change information of the input signal of the frequency difference signal unit based on the historical frequency difference data and the real-time frequency difference data of the frequency difference signal unit, and generate a frequency modulation instruction based on the intensity change information;

[0011] The adaptive filter is used to adjust the filter coefficient in response to the frequency modulation instruction;

[0012] The variable gain amplifier is electrically connected to the adaptive filter and is used to dynamically adjust the gain amplification factor according to the filter coefficient adjusted by the adaptive filter.

[0013] In one possible implementation, the power grid frequency regulation control component further includes a supporting cabinet, the interior of the supporting cabinet is fixedly connected with a circuit board, and the side of the circuit board is fixedly connected with an energy storage system unit, a switching module, a dynamic correction module, an electrically adjustable attenuator, an error integrator and a loop filter;

[0014] The energy storage system unit is electrically connected to the AGC control frequency modulation module and is used to perform charging and discharging operations according to the instructions of the AGC control frequency modulation module;

[0015] The switching module is used to control the switching of the energy storage system unit between the charging and discharging modes;

[0016] The dynamic correction module is used to dynamically adjust the frequency modulation control parameters in the frequency modulation instruction according to the actual operation status of the power grid and historical frequency modulation data;

[0017] The electrically adjustable attenuator is used to provide additional attenuation when the input signal is too strong, and adjust the attenuation strategy according to the historical signal environment and the current signal environment;

[0018] The error integrator is used to accumulate and calculate the error in the frequency modulation control process and adjust the frequency modulation strategy;

[0019] The loop filter is used to filter out noise and interference in the power grid frequency modulation device.

[0020] In one possible implementation, a support assembly is included, the top of which is fixedly connected to a lifting assembly, the power grid frequency modulation control assembly is installed on the top of the lifting assembly; a wind power generation assembly is arranged on the top of the power grid frequency modulation control assembly;

[0021] The support assembly comprises a base, and a support cylinder rod is fixedly connected to the top of the base;

[0022] The wind power generation assembly includes a loading box, a load-bearing rod is fixedly connected to the top of the loading box, a bearing seat is fixedly connected to the top of the load-bearing rod, a first rotating rod is rotatably connected to the inside of the bearing seat, a first gear is rotatably connected to the bottom of the first rotating rod, a belt is provided on the side of the first gear, a second gear is provided inside the belt, a generator is provided at the bottom of the second gear, an output end of the generator is fixedly connected to the second gear, and a wind blade is fixedly connected to the side of the first rotating rod.

[0023] In one possible implementation, a solar power generation component is disposed inside the wind power generation component;

[0024] The solar power generation component includes a transducer inverter, which is fixedly connected to the inside of a loading box. A second drive motor is installed inside the loading box. A second actuator is fixedly connected to the side of the second drive motor. The output end of the second drive motor is rotatably connected to a second rotating rod. A fixed seat is fixedly connected to the side of the second rotating rod. A photovoltaic panel is fixedly connected to the top of the fixed seat.

[0025] In one possible implementation, a cooling fan is installed on the side of the supporting cabinet, a cabinet door is fixedly connected to the side of the supporting cabinet, and a handle is fixedly connected to the side of the cabinet door.

[0026] In one possible implementation, two second rotating rods and two photovoltaic panels are provided, the two second rotating rods and two photovoltaic panels are arranged on both sides of the second driving motor, and the two second rotating rods extend to the outside of the loading box.

[0027] In one possible implementation, the power grid frequency regulation control component further includes a remote control module and a wireless transmission module;

[0028] The remote control module is electrically connected to the electrically adjustable attenuator, and the wireless transmission module is electrically connected to the remote control module and the error integrator.

[0029] In one possible implementation, the lifting assembly includes an installation box, a first drive motor is installed inside the installation box, an output end of the first drive motor is fixedly connected to a transmission wheel, a side of the transmission wheel is meshingly connected to a rotating wheel, an internal thread of the rotating wheel is connected to a threaded rod, a bottom thread of the threaded rod is connected to a threaded disk, and the threaded disk is fixedly connected to the support tube rod.

[0030] In one possible implementation manner, a first actuator is fixedly connected to the bottom of the first drive motor, and a top block is fixedly connected to the top of the threaded rod.

[0031] In one possible implementation manner, a fixing groove is fixedly connected to the top of the top block, and the fixing groove is fixedly connected to the loading box.

[0032] Compared with the prior art, this application has the following beneficial effects:

[0033] In the present application, the frequency of the power grid is modulated by utilizing a feedback AGC circuit system composed of an AGC control frequency modulation module, a variable gain amplifier, and an electrically adjustable attenuator. The purpose of the feedback AGC circuit system is to enable the gain of the receiver to be automatically adjusted according to the strength of the input signal, so that the amplitude of the useful signal remains constant or varies within a specific range after passing through the AGC. The AGC can ensure that the receiver gain is increased when a weak signal is received, and the gain is reduced when a strong signal is received, so that the output signal is maintained at an appropriate level, so that the receiver will not fail to work normally due to a too small input signal, and the receiver will not be saturated or blocked due to a too large input signal. The feedback AGC circuit does not have high requirements on the detection range of the peak detector, and the order meets the gain control needs, making the power grid frequency modulation more efficient.

[0034] 2. In the present application, the wind blades drive the first rotating rod to rotate synchronously under the support of wind force, so that the transmission mechanism composed of the first gear, belt and second gear can drive the generator to generate electricity, and the photovoltaic panels illuminated by sunlight convert electrical energy through the energy conversion inverter. The use of dual energy can improve the utilization rate of energy. If the power supply system is used in general remote areas, it can give full play to the advantages of abundant wind energy in remote areas to facilitate better energy storage.

[0035] 3. In the present application, the grid frequency modulation device can be remotely controlled as a whole by utilizing the remote control module and the wireless transmission module, and a signal can be remotely transmitted to the first actuator and the second actuator. When the first actuator controls the first drive motor to drive, the transmission wheel and the rotating wheel can be engaged, and then the threaded rod can be lifted and lowered, thereby adjusting the height of the grid frequency modulation control component, the wind power generation component and the solar power generation component at the top of the lifting component to prevent damage due to being too low. When the second actuator controls the second drive motor to operate, the photovoltaic panel on the top of the second rotating rod can be driven to rotate, so that the photovoltaic panel can collect the solar thermal energy of the day to the greatest extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a schematic diagram of the overall structure of this application;

[0037] Figure 2 This is a schematic diagram of the structure of the wind power generation component of this application;

[0038] Figure 3 This is a schematic diagram of the structure of the solar power generation assembly of this application;

[0039] Figure 4 This is a schematic diagram of the lifting assembly structure of this application;

[0040] Figure 5 This is a schematic diagram of the supporting cabinet structure of this application;

[0041] Figure 6 This is a schematic diagram of the structure of the power grid frequency regulation control component of this application.

[0042] In the figure: 1. Support assembly; 101. Base; 102. Support cylinder rod; 2. Lifting assembly; 201. Installation box; 202. First actuator; 203. First drive motor; 204. Transmission wheel; 205. Rotating wheel; 206. Threaded rod; 207. Threaded disk; 208. Top block; 209. Fixing slot; 3. Power grid frequency modulation control assembly; 301. Support cabinet; 302. Cooling fan; 303. Cabinet door; 304. Handle; 305. Circuit board; 306. Energy storage system unit; 307. AGC control frequency modulation module; 308. Switching module; 309. Microprocessor; 310. Adder; 311. Load instruction receiving module; 312. Frequency difference signal unit; 313. 13. Dynamic correction module; 314. Signal transceiver module; 315. Variable gain amplifier; 316. Electrically adjustable attenuator; 317. Remote control module; 318. Wireless transmission module; 319. Error integrator; 320. Loop filter; 4. Wind power generation component; 401. Loading box; 402. Loading rod; 403. First gear; 404. Bearing seat; 405. Belt; 406. Generator; 407. Second gear; 408. First rotating rod; 409. Wind blade; 5. Solar power generation component; 501. Energy conversion inverter; 502. Second drive motor; 503. Second actuator; 504. Second rotating rod; 505. Fixed seat; 506. Photovoltaic panel. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0044] See also Figure 1 to Figure 6 , this application provides a power grid frequency modulation device:

[0045] A power grid frequency modulation device and method, comprising a support component 1, a lifting component 2 is fixedly connected to the top of the support component 1, a power grid frequency modulation control component 3 is fixedly connected to the top of the lifting component 2, a wind power generation component 4 is arranged on the top of the power grid frequency modulation control component 3, and a solar power generation component 5 is arranged inside the wind power generation component 4.

[0046] This embodiment achieves efficient regulation of the grid frequency by integrating a variety of renewable energy power generation components. Specifically, the support component 1 is used to stabilize the entire grid frequency regulation structure. The lifting component 2 is used to adjust the height of the grid frequency regulation control component 3 to adapt to different environmental conditions and prevent damage due to the component being too low. The grid frequency regulation control component 3 is used to implement the frequency regulation strategy. The wind power generation component 4 is used to provide clean energy for the grid through wind power. The solar power generation component 5 is used to supplement the grid energy through solar power generation and improve the diversity and reliability of energy. In addition, through the adjustment of the lifting component 2, the wind power generation component 4 can also adapt to different wind conditions and optimize the performance of the wind power generation component 4.

[0047] The power grid frequency modulation device provided in this application is described in detail below through specific embodiments.

[0048] See also Figure 1 to Figure 3 , Figure 5-6 The support assembly 1 includes a base 101, and a support rod 102 is fixedly connected to the top of the base 101. The base 101 is used to provide a stable support point for the power grid frequency modulation device, ensuring that the entire device can remain stable under various environmental conditions, especially when the wind is strong, it can also prevent the device from tilting or collapsing. The support rod 102 connects the base 101 and the lifting assembly 2, and is used to support the lifting assembly 2 and allow it to move up and down to adjust the height of the power grid frequency modulation control assembly 3.

[0049] In some embodiments, the support rod 102 can also be designed as a hollow structure for wiring or installing pipelines to protect cables and pipelines from external environmental influences, such as avoiding wind, sun, and physical damage. By designing a retractable support rod 102, the height of the grid frequency control component 3 can be flexibly adjusted to adapt to different environments or optimize power generation efficiency.

[0050] The power grid frequency regulation control component 3 includes a supporting cabinet 301, and a circuit board 305 is fixedly connected inside the supporting cabinet 301. A cooling fan 302 is also installed on the side of the supporting cabinet 301, and a cabinet door 303 is fixedly connected to the side of the supporting cabinet 301, and a handle 304 is fixedly connected to the side of the cabinet door 303. The supporting cabinet 301 is used to provide physical support for the power grid frequency regulation control component 3 to ensure that these sensitive control devices can be firmly installed in the appropriate position. A standardized interface is designed to facilitate connection and integration with other components such as wind power generation components 4 and solar power generation components 5.

[0051] In some embodiments, the supporting cabinet 301 may adopt a closed or semi-closed structure to protect the internal grid frequency control component 3 from environmental factors such as dust, humidity, temperature changes, etc., thereby extending the service life of the equipment and ensuring its reliability.

[0052] The side of the circuit board 305 is fixedly connected with an energy storage system unit 306, an AGC control frequency modulation module 307, a switching module 308, a microprocessor 309, an adder 310, a load instruction receiving module 311, a frequency difference signal unit 312, a dynamic correction module 313, a signal transceiver module 314, a variable gain amplifier 315, an electrically adjustable attenuator 316, a remote control module 317, a wireless transmission module 318, an error integrator 319 and a loop filter 320.

[0053] This embodiment uses a feedback AGC circuit system composed of an AGC control frequency modulation module, a variable gain amplifier, and an electrically adjustable attenuator to modulate the power grid, so that the gain of the receiver can be automatically adjusted according to the strength of the input signal. The amplitude of the useful signal remains constant or changes within a specific range after passing through the AGC. The AGC can ensure that when receiving a weak signal, the receiver gain is increased, and when receiving a strong signal, the gain is reduced, so that the output signal is maintained at an appropriate level, so that the receiver will not be unable to work normally due to a too small input signal, nor will the receiver be saturated or blocked due to a too large input signal. The feedback AGC circuit does not have high requirements for the detection range of the peak detector, and the order meets the gain control needs, making the power grid frequency modulation more efficient. The specific implementation method is as follows:

[0054] First, complete the connection configuration of each module in the power grid frequency control component 3. Among them, the energy storage system unit 306 is electrically connected to the AGC control frequency modulation module 307, and is used to perform charging and discharging operations according to the instructions of the AGC control frequency modulation module 307. The AGC control frequency modulation module 307 is electrically connected to the switching module 308, and the switching module 308 controls the switching of the energy storage system unit 306 between the charging and discharging modes. The switching module 308 is electrically connected to the microprocessor 309, and the microprocessor 309 is electrically connected to the adder 310. The adder 310 is electrically connected to the load instruction receiving module 311, and the load instruction receiving module 311 is electrically connected to the frequency difference signal unit 312.

[0055] The dynamic correction module 313 is electrically connected to the frequency difference signal unit 312, and is used to dynamically adjust the frequency control parameters in the frequency control instruction according to the actual operation of the power grid and the historical frequency modulation data. The dynamic correction module 313 is also electrically connected to the signal transceiver module 314, the signal transceiver module 314 is electrically connected to the variable gain amplifier 315, and the variable gain amplifier 315 is electrically connected to the electrically adjustable attenuator 316. Among them, the variable gain amplifier 315 is also electrically connected to an adaptive filter, which can automatically adjust the filtering parameters according to the characteristics of the input signal to achieve the optimal filtering effect.

[0056] The electrically adjustable attenuator 316 is electrically connected to the remote control module 317, allowing the operator to remotely control and monitor the operating status of the power grid frequency control component 3. The remote control module 317 is electrically connected to the wireless transmission module 318, and transmits data and control instructions through wireless communication technology to improve the flexibility and response speed of the system. The wireless transmission module 318 is electrically connected to the error integrator 319, and the error integrator 319 is electrically connected to the loop filter 320, which is used to accumulate and calculate the error in the frequency modulation control process and adjust the frequency modulation strategy. The feedback AGC circuit system composed of the AGC control frequency modulation module 307, the variable gain amplifier 315 and the electrically adjustable attenuator 316 is used to modulate the power grid frequency. The purpose of the feedback AGC circuit system is to enable the gain of the receiver to be automatically adjusted according to the strength of the input signal, so as to meet the gain control needs and make the power grid frequency modulation more efficient.

[0057] The AGC control frequency modulation module 307 predicts the intensity change information of the input signal of the frequency difference signal unit 312 based on the historical frequency difference data and the real-time frequency difference data of the frequency difference signal unit 312, and generates a frequency modulation instruction based on the intensity change information.

[0058] The above-mentioned adaptive filter is used to adjust the filter coefficient in response to the frequency modulation instruction sent by the AGC control frequency modulation module 307. The variable gain amplifier 315 is used to dynamically adjust the gain amplification factor according to the filter coefficient adjusted by the adaptive filter.

[0059] Furthermore, this embodiment takes into account that the traditional power grid frequency modulation device is a very uneconomical way to transmit electricity. Many remote areas and mountainous areas have the characteristics of long annual sunshine hours or strong winds, or both, but they cannot be used at the same time, resulting in a waste of resources. Therefore, by integrating multiple renewable energy power generation components, efficient regulation of the power grid frequency is achieved.

[0060] Specifically, the wind power generation assembly 4 includes a loading box 401, and a load-bearing rod 402 is fixedly connected to the top of the loading box 401. The load-bearing rod 402 is used to provide a stable support structure for the rotor (including blades and hub) of the wind power generation assembly 4. The load-bearing rod 402 is fixed to the top of the loading box 401, and is used to install and support mechanical components of the wind turbine, such as a gear box, a generator, etc., to ensure that these components can operate stably under the action of wind.

[0061] The top of the support rod 402 is fixedly connected to a bearing seat 404, and the interior of the bearing seat 404 is rotatably connected to a first rotating rod 408. The bearing seat 404 provides rotational support for the first rotating rod 408 to reduce friction and ensure smooth rotation. The bottom of the first rotating rod 408 is rotatably connected to a first gear 403, a belt 405 is provided on the side of the first gear 403, a second gear 407 is provided inside the belt 405, a generator 406 is provided at the bottom of the second gear 407, and the output end of the generator 406 is fixedly connected to the second gear 407, and a wind blade 409 is fixedly connected to the side of the first rotating rod 408. The solar power generation component 5 includes an energy conversion inverter 501, and the energy conversion inverter 501 is fixedly connected to the interior of the loading box 401. A second drive motor 502 is installed inside the loading box 401, and the side of the second drive motor 502 is fixed. A second actuator 503 is connected, and the output end of the second drive motor 502 is rotatably connected to the second rotating rod 504. A fixing seat 505 is fixedly connected to the side of the second rotating rod 504, and a photovoltaic panel 506 is fixedly connected to the top of the fixing seat 505. The wind blade 409 drives the first rotating rod 408 to rotate synchronously under the support of wind force, so that the transmission mechanism composed of the first gear 403, the belt 405 and the second gear 407 can drive the generator 406 to generate electricity, and the photovoltaic panel 506 illuminated by sunlight converts electrical energy through the energy conversion inverter 501. The use of dual energy can improve the utilization rate of energy.

[0062] Two second rotating rods 504 and two photovoltaic panels 506 are provided. The two second rotating rods 504 and the two photovoltaic panels 506 are arranged on both sides of the second driving motor 502 , and the two second rotating rods 504 extend to the outside of the loading box 401 .

[0063] In this embodiment, Figure 1 , Figure 4 and Figure 6As shown, the lifting assembly 2 includes an installation box 201, a first driving motor 203 is installed inside the installation box 201, an output end of the first driving motor 203 is fixedly connected to a transmission wheel 204, a side of the transmission wheel 204 is meshedly connected to a rotating wheel 205, an inner thread of the rotating wheel 205 is connected to a threaded rod 206, a bottom thread of the threaded rod 206 is connected to a threaded disk 207, the threaded disk 207 is fixedly connected to the support cylinder rod 102, the bottom of the first driving motor 203 is fixedly connected to the first actuator 202, the threaded rod 206 is connected to the support cylinder rod 102, and the first actuator 202 is fixedly connected to the support cylinder rod 102. The top of the rod 206 is fixedly connected with a top block 208, and the top of the top block 208 is fixedly connected with a fixing groove 209, and the fixing groove 209 is fixedly connected to the loading box 401. When the first actuator 202 controls the first driving motor 203 to drive, the transmission wheel 204 and the rotating wheel 205 can be engaged, and then the threaded rod 206 can be lifted and lowered, so that the height of the power grid frequency modulation control component 3, the wind power generation component 4 and the solar power generation component 5 at the top position of the lifting component 2 can be adjusted, thereby increasing the adaptability of the equipment to the working environment.

[0064] The working process of this scheme includes: when the power grid frequency modulation device and method of this scheme are used, the wind blade 409 drives the first rotating rod 408 to rotate synchronously under the support of wind force, so that the transmission mechanism composed of the first gear 403, the belt 405 and the second gear 407 drives the generator 406 to generate electricity, and the photovoltaic panel 506 irradiated by sunlight converts electric energy through the energy conversion inverter 501. The dual energy can be carried out at the same time to maximize the utilization rate of new energy. The power grid frequency modulation device can be remotely controlled as a whole by using the remote control module 317 and the wireless transmission module 318, and the first actuator 202 and the first actuator 203 can be remotely controlled. The second actuator 503 transmits a signal. When the first actuator 202 controls the first drive motor 203 to drive, the transmission wheel 204 and the rotating wheel 205 can be meshed, so that the threaded rod 206 can be lifted and lowered, so that the height of the power grid frequency modulation control component 3, the wind power generation component 4 and the solar power generation component 5 at the top of the lifting component 2 can be adjusted. When the second actuator 503 controls the second drive motor 502 to operate, the photovoltaic panel 506 at the top of the second rotating rod 504 can be driven to rotate, so that the photovoltaic panel 506 can expand the collection efficiency of solar energy. After the energy storage is completed, the energy storage system unit 306 is used in response to the energy storage system unit 306. The frequency modulation instruction is different from the traditional frequency modulation of hydropower units or thermal power units. It can respond to the frequency modulation instruction in both directions. The benefits of energy storage participating in frequency modulation can be divided into two aspects. On the one hand, it is the discharge power benefit of responding to the frequency increase instruction, and on the other hand, it is the charging power benefit of responding to the grid frequency reduction instruction. Wind power generation and solar energy storage increase the energy storage system unit 306. When the state of charge is in the homing zone and the frequency can respond to the frequency modulation demand at the next moment, the AGC control frequency modulation module 307 remains constant or changes within a specific range. The AGC control frequency modulation module 307 can ensure that when receiving weak signals, the receiver gain is increased, and when receiving strong signals, the AGC control frequency modulation module 307 can ensure that when receiving weak signals, the receiver gain is increased, and when receiving strong signals, the AGC control frequency modulation module 307 can ensure that when receiving weak signals, the receiver gain is increased, and when receiving strong signals, the AGC control frequency modulation module 307 can ensure that when receiving weak signals, the receiver gain is increased, and when receiving strong signals, the AGC control frequency modulation module 307 can ensure that when receiving weak signals, the AGC control frequency modulation module 307 can ensure that when receiving weak signals, the AGC control frequency modulation module 307 can ensure that the AGC control frequency modulation module 307 is changed. When receiving strong signals, ... The gain is reduced, so that the output signal is maintained at an appropriate level, so that the input signal is not too small to work properly, and the receiver is not saturated or blocked due to the input signal being too large, so that the grid frequency modulation efficiency is higher. In order to promote the enthusiasm for the application of energy storage frequency modulation in the power system and improve the economy of energy storage frequency modulation operation, it is of great significance to study the reasonable frequency modulation energy storage capacity configuration. The AGC control frequency modulation module 307, the variable gain amplifier 315 and the electrically adjustable attenuator 316 construct the full life economic evaluation of the frequency modulation energy storage system unit 306, increase the economy of the energy storage system unit 306 participating in the grid frequency modulation, and increase the frequency modulation and energy storage benefits.

[0065] Although the embodiments of the present application have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A power grid frequency modulation device, characterized in that: It comprises a power grid frequency modulation control component (3), wherein the power grid frequency modulation control component (3) comprises an AGC control frequency modulation module (307), a frequency difference signal unit (312), an adaptive filter and a variable gain amplifier (315); The AGC control frequency modulation module (307) is used to predict the intensity change information of the input signal of the frequency difference signal unit (312) based on the historical frequency difference data and the real-time frequency difference data of the frequency difference signal unit (312), and generate a frequency modulation instruction based on the intensity change information; The adaptive filter is used to adjust the filter coefficient in response to the frequency modulation instruction; The variable gain amplifier (315) is electrically connected to the adaptive filter and is used to dynamically adjust the gain amplification factor according to the filter coefficient adjusted by the adaptive filter.

2. A power grid frequency modulation device according to claim 1, characterized in that: The power grid frequency modulation control component (3) further comprises a supporting cabinet (301), the interior of the supporting cabinet (301) being fixedly connected with a circuit board (305), and the side of the circuit board (305) being fixedly connected with an energy storage system unit (306), a switching module (308), a dynamic correction module (313), an electrically adjustable attenuator (316), an error integrator (319) and a loop filter (320); The energy storage system unit (306) is electrically connected to the AGC control frequency modulation module (307) and is used to perform charging and discharging operations according to instructions of the AGC control frequency modulation module (307); The switching module (308) is used to control the switching of the energy storage system unit (306) between the charging mode and the discharging mode; The dynamic correction module (313) is used to dynamically adjust the frequency modulation control parameters in the frequency modulation instruction according to the actual operation status of the power grid and historical frequency modulation data; The electrically adjustable attenuator (316) is used to provide additional attenuation when the input signal is too strong, and adjust the attenuation strategy according to the historical signal environment and the current signal environment; The error integrator (319) is used to accumulate and calculate the error in the frequency modulation control process and adjust the frequency modulation strategy; The loop filter (320) is used to filter out noise and interference in the power grid frequency modulation device.

3. A power grid frequency modulation device according to claim 1, characterized in that: It comprises a support component (1), the top of the support component (1) is fixedly connected to a lifting component (2), the power grid frequency modulation control component (3) is installed on the top of the lifting component (2); and a wind power generation component (4) is arranged on the top of the power grid frequency modulation control component; The support assembly (1) comprises a base (101), and a support rod (102) is fixedly connected to the top of the base (101); The wind power generation assembly (4) comprises a loading box (401), the top of the loading box (401) is fixedly connected to a load-bearing rod (402), the top of the load-bearing rod (402) is fixedly connected to a bearing seat (404), the inside of the bearing seat (404) is rotatably connected to a first rotating rod (408), the bottom of the first rotating rod (408) is rotatably connected to a first gear (403), a belt (405) is arranged on the side of the first gear (403), a second gear (407) is arranged inside the belt (405), a generator (406) is arranged at the bottom of the second gear (407), an output end of the generator (406) is fixedly connected to the second gear (407), and a wind blade (409) is fixedly connected to the side of the first rotating rod (408).

4. A power grid frequency modulation device according to claim 3, characterized in that: A solar power generation component (5) is arranged inside the wind power generation component; The solar power generation component (5) comprises an energy conversion inverter (501), the energy conversion inverter (501) is fixedly connected to the inside of a loading box (401), a second drive motor (502) is installed inside the loading box (401), a second actuator (503) is fixedly connected to the side of the second drive motor (502), an output end of the second drive motor (502) is rotatably connected to a second rotating rod (504), a fixed seat (505) is fixedly connected to the side of the second rotating rod (504), and a photovoltaic panel (506) is fixedly connected to the top of the fixed seat (505).

5. A power grid frequency modulation device according to claim 3, characterized in that: A heat dissipation fan (302) is installed on the side of the supporting cabinet (301), a cabinet door (303) is fixedly connected to the side of the supporting cabinet (301), and a handle (304) is fixedly connected to the side of the cabinet door (303).

6. A power grid frequency modulation device according to claim 3, characterized in that: There are two second rotating rods (504) and two photovoltaic panels (506), and the two second rotating rods (504) and two photovoltaic panels (506) are arranged on both sides of the second driving motor (502), and the two second rotating rods (504) extend to the outside of the loading box (401).

7. A power grid frequency modulation device according to claim 1, characterized in that: The power grid frequency regulation control component also includes a remote control module (317) and a wireless transmission module (318); The remote control module (317) is electrically connected to the electrically adjustable attenuator, and the wireless transmission module (318) is electrically connected to the remote control module (317) and the error integrator (319).

8. A power grid frequency modulation device according to claim 3, characterized in that: The lifting assembly (2) comprises an installation box (201), a first driving motor (203) is installed inside the installation box (201), an output end of the first driving motor (203) is fixedly connected to a transmission wheel (204), a side of the transmission wheel (204) is meshingly connected to a rotating wheel (205), an internal thread of the rotating wheel (205) is threadedly connected to a threaded rod (206), a bottom of the threaded rod (206) is threadedly connected to a threaded disk (207), and the threaded disk (207) is fixedly connected to the support tube rod (102).

9. A power grid frequency modulation device according to claim 8, characterized in that: The bottom of the first driving motor (203) is fixedly connected to the first actuator (202), and the top of the threaded rod (206) is fixedly connected to a top block (208).

10. A power grid frequency modulation device according to claim 9, characterized in that: A fixing groove (209) is fixedly connected to the top of the top block (208), and the fixing groove (209) is fixedly connected to the loading box (401).

Images