A new energy station frequency modulation system and method

Abstract

The application discloses a new energy station frequency modulation system and method, the frequency modulation system includes primary frequency modulation device, PMU device, fast frequency response device, data transmission unit, inverter execution unit, energy storage device execution unit, controllable unit execution unit, AGC control unit and remote online monitoring unit; the frequency modulation method includes: the fast frequency response device collects the grid point frequency and voltage and current signals, and calculates the active power transmission to the primary frequency modulation device; the primary frequency modulation device generates frequency modulation active target value adjustment instruction and frequency modulation action signal; when the frequency of the power station grid point crosses the frequency modulation dead zone, primary frequency modulation is carried out, the inverter execution unit, the energy storage device execution unit and the controllable unit execution unit adjust the inverter, the energy storage device and the controllable unit respectively, and the AGC control unit locks the AGC adjustment according to the frequency modulation action signal; when the power grid frequency returns to normal, the primary frequency modulation is exited, and the AGC adjustment control mode is entered.

Description

Technical Field

[0001] This invention relates to the field of frequency regulation technology for new energy power stations, and in particular to a frequency regulation system and method for new energy power stations. Background Technology

[0002] Common regulation methods for maintaining grid frequency stability in power systems include variable frequency generator (VFD) regulation and large-scale chemical battery charge / discharge regulation. During normal operation, power generation and load are essentially balanced, and the grid frequency remains stable near its rated value. However, when load fluctuates, such as during peak electricity consumption periods when a large number of electrical devices are put into use, causing a sudden increase in load, the balance between power generation and load is disrupted, leading to a drop in grid frequency. This is where VFDs come into play. By sensing frequency changes through the generator's own speed control system (such as the turbine governor), and based on the frequency deviation signal, the speed control system automatically adjusts the amount of steam entering the turbine (for thermal power generators), thereby changing the generator's output power to increase and match the increased load, allowing the grid frequency to rise back to near its rated value. Conversely, during off-peak hours when load decreases and the grid frequency tends to rise, the speed control system will correspondingly reduce the steam intake, lowering the output power to maintain a dynamic balance between power generation and load, ensuring grid frequency stability.

[0003] New energy power plants mainly include solar photovoltaic power plants and wind power plants. New energy power plants mainly rely on renewable energy to generate electricity. By deploying power generation equipment on a large scale, they convert new energy sources such as solar energy, wind energy, hydro energy, and biomass energy into electrical energy and connect it to the power grid to supply various electricity users. They are an important production unit for new energy power generation.

[0004] In the current global trend of energy transition and the pursuit of clean, low-carbon, and sustainable development, photovoltaic (PV) power generation technology, with its numerous advantages, holds a crucial position among many new energy technologies and even the entire energy sector. Its advantages are becoming increasingly prominent, and its application scope is continuously expanding, making it a high-potential, high-quality energy technology. Currently, new energy power plants lack primary frequency regulation. Primary frequency regulation is the first line of defense for maintaining frequency stability in the power system. If generator sets and related equipment lack primary frequency regulation technology, the inability to regulate the frequency of PV and wind power systems after they are connected to the grid will lead to increased frequency fluctuations in the power grid and threaten grid stability. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the purpose of this invention is to provide a frequency regulation system and method for new energy power stations, so as to solve the problem of how to perform frequency regulation in existing new energy power stations.

[0006] This invention first provides a frequency regulation system for a new energy power station, including a primary frequency regulation device, a PMU device, a fast frequency response device, a data transmission unit, an inverter execution unit, an energy storage device execution unit, a controllable unit execution unit, an AGC control unit, and a remote online monitoring unit;

[0007] The primary frequency regulation device is connected to the PMU device, the primary frequency regulation device is connected to the gateway device, the gateway device is connected to the dispatch master station, and the primary frequency regulation device is connected to the grid connection point of the new energy power station.

[0008] The primary frequency regulation device is connected to the PMU device, the primary frequency regulation device is connected to the gateway device, the gateway device is connected to the dispatch master station, the primary frequency regulation device is connected to the fast frequency response device, and the fast frequency response device is connected to the grid connection point of the new energy power station.

[0009] The inverter execution unit, the energy storage device execution unit, and the controllable generator unit are respectively connected to the data transmission unit, and the AGC control unit and the primary frequency regulation device are respectively connected to the data transmission unit;

[0010] The AGC control unit is connected to the primary frequency modulation device and the gateway device; the remote online monitoring unit is connected to the primary frequency modulation device and the remote online monitoring unit is connected to the dispatch master station.

[0011] Preferably, the data transmission unit includes a data collector, a communication management unit, and a protocol converter, wherein the data collector is connected to the communication management unit, and the protocol converter is connected to the communication management unit.

[0012] Preferably, the remote line monitoring unit includes a signal acquisition module and a signal storage module, the signal acquisition module is connected to the primary frequency modulation device, and the signal storage module is connected to the dispatch master station.

[0013] Preferably, the primary frequency modulation device and the PMU device are connected by a 4mA to 20mA DC hardwire connection.

[0014] This invention also provides a frequency regulation method for a new energy power station. The frequency regulation method for the new energy power station adopts the frequency regulation system for the new energy power station described above, and the frequency regulation method for the new energy power station includes the following steps:

[0015] S1. The fast frequency response device directly collects the frequency and voltage current signals of the grid connection point of the new energy power station, calculates the corresponding active power, and transmits it to the primary frequency regulation device.

[0016] S2. The primary frequency regulation device generates a frequency regulation active power target value adjustment command and a frequency regulation action signal, and transmits the frequency regulation active power target value adjustment command and frequency regulation action signal to the inverter execution unit, the energy storage device execution unit and the controllable unit execution unit, and at the same time sends the frequency regulation action signal to the AGC control unit.

[0017] S3. When the frequency of the power station grid connection point exceeds the frequency regulation dead zone, the primary frequency regulation device performs primary frequency regulation control mode. The inverter execution unit, energy storage device execution unit and controllable unit respectively adjust the inverter, energy storage device and controllable unit according to their respective frequency regulation active power target value adjustment instructions and frequency regulation action signals. The AGC control unit locks out AGC regulation according to the frequency regulation action signal.

[0018] S4. When the power grid frequency returns to normal, the primary frequency regulation device exits the primary frequency regulation control mode and generates a frequency regulation action reset signal to the AGC control unit, thereby opening the AGC regulation function and entering the AGC regulation control mode.

[0019] Preferably, the frequency modulation control deviation of the primary frequency modulation control mode is controlled within ±1% of the start-up capacity of the primary frequency modulation control object.

[0020] Preferably, the frequency regulation method for the new energy power station further includes performing a remote frequency regulation test on the new energy power station, the remote frequency regulation test including:

[0021] S10, The remote line monitoring unit monitors the primary frequency modulation (FM) activation and deactivation status signals, FM operation and reset signals in real time;

[0022] S20. The dispatching master station can obtain the primary frequency modulation (FM) activation and deactivation status signals, FM actions, and reset signals in real time.

[0023] S30. The dispatching master station is equipped with a primary frequency modulation (FM) entry signal for remote testing and a primary frequency modulation exit signal for remote testing.

[0024] S40. The dispatching master station sends down the primary frequency modulation remote test simulation frequency. The primary frequency modulation device responds to the primary frequency modulation remote test simulation frequency and completes the primary frequency modulation performance remote test.

[0025] During the primary frequency regulation remote test, the primary frequency regulation device does not respond to the actual frequency signal of the power grid, but only to the simulated frequency of the primary frequency regulation remote test issued by the dispatch master station.

[0026] Preferably, the real-time primary frequency modulation signal in the primary frequency modulation control mode includes: the on-time capacity, current active power, current frequency and control target power of the primary frequency modulation controlled object, the return value of the primary frequency modulation remote test simulation frequency, the primary frequency modulation entry and exit signal, the primary frequency modulation action and reset signal, the primary frequency modulation entry into remote test signal, the primary frequency modulation entry into and exit from remote test, and the primary frequency modulation remote test simulation frequency.

[0027] Preferably, in the primary frequency regulation control mode, the primary frequency regulation limit of the primary frequency regulation control object is ±6% of the rated active power of the primary frequency regulation control object.

[0028] The present invention has the following beneficial effects:

[0029] 1. The frequency regulation system of new energy power plants takes the grid connection point frequency of new energy power plants as the primary frequency regulation control object. In principle, different grid connection points should establish different primary frequency regulation control objects. The primary frequency regulation control objects of new energy power plants are inverters, energy storage devices and controllable units in the power plant. Through the frequency regulation system, the primary frequency of inverters, energy storage devices and controllable units in the power plant can be regulated to avoid aggravating frequency fluctuations in the power grid and improve the stability of the power grid.

[0030] 2. In the frequency regulation system of the new energy power station, the primary frequency regulation and AGC functions can be operated separately or simultaneously. The primary frequency regulation does not affect the control rate of the original AGC of the new energy power station, and the primary frequency regulation has a higher priority than AGC regulation. This makes the frequency fluctuation regulation of the power grid more flexible after the new energy power station is connected to the power grid.

[0031] 3. The frequency regulation system of the new energy power station has the function of online monitoring of primary frequency regulation. When it receives the remote test command for primary frequency regulation issued by the dispatch master station, the new energy power station enters the remote test mode for primary frequency regulation. At this time, the primary frequency regulation of the new energy power station no longer responds to the actual frequency signal of the power grid, but instead responds to the simulated frequency command for remote test of primary frequency regulation issued by the dispatch master station. Attached Figure Description

[0032] Figure 1 This is a structural diagram of the frequency regulation system for a new energy power station provided in an embodiment of the present invention. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "top surface," "bottom surface," "inner," "outer," "inner side," and "outer side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0035] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. Where the terms "first," "second," and "third" are used for descriptive purposes and to distinguish technical features, they should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the sequential relationship of the indicated technical features.

[0036] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The embodiments of this invention will now be described according to its overall structure.

[0037] Example 1

[0038] Example 1 provides a frequency regulation system for a new energy power station, including a primary frequency regulation device, a PMU device, a fast frequency response device, a data transmission unit, an inverter execution unit, an energy storage device execution unit, a controllable unit execution unit, an AGC control unit, and a remote online monitoring unit.

[0039] The primary frequency regulation device is connected to the PMU device, the primary frequency regulation device is connected to the gateway device, the gateway device is connected to the dispatch master station, the primary frequency regulation device is connected to the fast frequency response device, and the fast frequency response device is connected to the grid connection point of the new energy power station.

[0040] The inverter execution unit, the energy storage device execution unit, and the controllable generator unit are respectively connected to the data transmission unit, and the AGC control unit and the primary frequency regulation device are respectively connected to the data transmission unit.

[0041] The AGC control unit is connected to the primary frequency modulation device and the gateway device; the remote online monitoring unit is connected to the primary frequency modulation device and the remote online monitoring unit is connected to the dispatch master station.

[0042] The primary frequency regulation control objects of new energy power plants are inverters, energy storage devices, and controllable generator units within the plant. Among them, inverters mainly refer to those in solar photovoltaic power plants and wind power plants. Energy storage devices and controllable generator units also refer to those in solar photovoltaic power plants and wind power plants.

[0043] The fast frequency response device is used to directly and accurately acquire the frequency and voltage current signals at the power station grid connection point, and calculate the corresponding active power to transmit to the primary frequency regulation device.

[0044] The primary frequency regulation device is used to generate primary frequency regulation active power commands and interlocking commands based on the grid frequency of each control object at the grid connection point of the new energy power plant and the dispatching instructions issued by the dispatching master station. The primary frequency regulation active power commands are sent to the execution units of each control object, and the execution units adjust the output power of each control object. The interlocking commands are sent to the AGC control unit to interlock the adjustment of the AGC control unit. The primary frequency regulation device is used to perform primary frequency regulation on the new energy power plant.

[0045] The data transmission unit is used to convert and transmit various instruction data output from the primary frequency regulation device and the AGC control unit, enabling the data transmission unit to convert various data instructions into data that can be recognized by the inverter execution unit, energy storage device execution unit, and controllable unit execution unit. The execution unit then adjusts the controlled object based on the received data.

[0046] The frequency regulation system is capable of historically storing key primary frequency regulation data (such as frequency, primary frequency regulation load commands, actual active power values, primary frequency regulation function activation / deactivation status, and primary frequency regulation operation status). The data storage interval is no more than 1 second, and the data storage duration is no less than three months. The annual availability rate of the primary frequency regulation function is no less than 99.9%.

[0047] In the specific implementation plan, the AGC power control system in the new energy power station is connected to the frequency regulation system. The AGC power control system data command data network and the final execution inverter unit have overlapping parts with the frequency regulation system. The AGC system needs to coordinate with the frequency regulation system through command superposition, command interlocking, etc. Information interaction with the AGC system can be achieved through IEC-104 or other power standard communication protocols.

[0048] In the frequency regulation system, primary frequency regulation and AGC (Automatic Guided Vehicle) control are coordinated. The primary frequency regulation function of the renewable energy power plant should be coordinated with the AGC control. The control target of the active power of the renewable energy power plant is the algebraic sum of the AGC active power command and the primary frequency regulation response adjustment. When the grid frequency exceeds the primary frequency regulation dead zone of the renewable energy power plant, the primary frequency regulation function of the renewable energy power plant should block the AGC reverse adjustment command.

[0049] Through the remote online monitoring unit, the frequency regulation system of the new energy power station has the function of online monitoring of primary frequency regulation and has a remote command interface. When it receives the command to enter remote testing of primary frequency regulation issued by the dispatch master station system, the new energy power station enters the remote testing mode of primary frequency regulation. At this time, the primary frequency regulation system of the new energy power station no longer responds to the actual frequency signal of the power grid, but instead responds to the simulated frequency command for remote testing of primary frequency regulation issued by the dispatch master station system.

[0050] In a preferred embodiment, the data transmission unit includes a data collector, a communication management unit, and a protocol converter, wherein the data collector is connected to the communication management unit, and the protocol converter is connected to the communication management unit.

[0051] For example, in a specific implementation plan, for photovoltaic power plants in new energy power stations, the photovoltaic area transformer substation monitoring and control, as the execution unit of the inverter, needs to add an IEC-104 communication channel with the primary frequency regulation system. This allows for the selective forwarding of the inverter's telemetry, telesignaling, remote control, and remote adjustment to the primary frequency regulation system. By interacting with the primary frequency regulation system, the system can accurately and quickly forward the active power commands issued by the primary frequency regulation system to the inverter for execution.

[0052] In a preferred embodiment, the remote line monitoring unit includes a signal acquisition module and a signal storage module. The signal acquisition module is connected to the primary frequency modulation device, and the signal storage module is connected to the dispatch master station.

[0053] In a preferred embodiment, the primary frequency modulation device and the PMU device are connected by a 4mA to 20mA DC hardwire connection.

[0054] The frequency regulation system interacts with the dispatching frequency regulation master station through the PMU. The primary frequency regulation supports communication mode or 4-20mA analog output mode to interact with the PMU. The system exchanges telemetry data such as the available power of the station, the frequency of the controlled object, the return value of the disturbance frequency, the active power of the controlled object, the before / after correction command, and the return value of the simulated load command, and sends them to the superior dispatching master station in real time.

[0055] In specific implementation schemes, communication can be achieved directly with the PMU device via the data transmission protocols GB / T26865.2-2011 or Q / GDW 131-2006, enabling real-time online data transmission and interaction, and sending the data to the dispatch center. For the 4-20mA analog output method, the new energy fast frequency response device has multiple analog output interfaces, converting the corresponding telemetry signals into 4-20mA DC analog signals, which are directly connected to the corresponding acquisition channels of the PMU device for real-time online data transmission and interaction, and then sent to the dispatch master station.

[0056] Example 2

[0057] Example 2 provides a frequency regulation method for a new energy power station. The frequency regulation method for the new energy power station adopts the frequency regulation system for new energy power stations described above, and includes the following steps:

[0058] S1. The fast frequency response device directly collects the frequency and voltage current signals of the grid connection point of the new energy power station, calculates the corresponding active power, and transmits it to the primary frequency regulation device.

[0059] S2. The primary frequency regulation device generates a frequency regulation active power target value adjustment command and a frequency regulation action signal, and transmits the frequency regulation active power target value adjustment command and frequency regulation action signal to the inverter execution unit, the energy storage device execution unit and the controllable unit execution unit, and at the same time sends the frequency regulation action signal to the AGC control unit.

[0060] S3. When the frequency of the power station's grid connection point exceeds the frequency regulation dead zone, the primary frequency regulation device enters the primary frequency regulation control mode. The inverter execution unit, energy storage device execution unit, and controllable unit execution unit adjust the inverter, energy storage device, and controllable unit respectively according to their corresponding frequency regulation active power target value adjustment instructions and frequency regulation action signals. The AGC control unit locks out AGC regulation according to the frequency regulation action signal.

[0061] S4. When the power grid frequency returns to normal, the primary frequency regulation device exits the primary frequency regulation control mode and generates a frequency regulation action reset signal to the AGC control unit, thereby opening the AGC regulation function and entering the AGC regulation control mode.

[0062] In the specific frequency regulation implementation plan, the primary frequency regulation dynamic indicators of renewable energy power plants should meet the following requirements:

[0063] (1) Response lag time: The time required from the start of the frequency crossing the frequency dead zone of the new energy power station to the reliable change in power generation output in the frequency direction. No more than 3 seconds for wind farms and no more than 2 seconds for photovoltaic power stations.

[0064] (2) Response time: The time required from the start of frequency exceeding the frequency regulation dead zone until the active power adjustment of the primary frequency regulation control object reaches 90% of the difference between the frequency regulation target value and the initial power. No more than 10 seconds for wind farms and no more than 5 seconds for photovoltaic power plants.

[0065] (3) Adjustment time: The shortest time from when the frequency exceeds the frequency regulation dead zone until the active power of the primary frequency regulation controlled object reaches stability (power fluctuation does not exceed ±1% of the primary frequency regulation controlled object's operating capacity). For wind farms and photovoltaic power stations, it shall not exceed 15 seconds.

[0066] In the specific frequency modulation implementation plan, the frequency modulation control deviation of the primary frequency modulation control mode is controlled within ±1% of the start-up capacity of the primary frequency modulation control object.

[0067] In the specific frequency regulation implementation plan, the primary frequency regulation function of the renewable energy power station takes into account the active power control and regulation capacity constraints within the station when generating the unit frequency regulation command. Under high-frequency grid disturbances, when the active power command of the renewable energy power station drops to 20% of the operating capacity of the primary frequency regulation control object (10% for photovoltaic), it can stop adjusting downwards, thus avoiding the disconnection or shutdown of wind turbines and inverters from the grid.

[0068] In the specific frequency regulation implementation plan, the PMU device and the frequency regulation device exchange data via 4-20mA DC hardwire or communication, and forward the data to the dispatch master station. The AGC control system forwards the local and remote AGC target commands to the primary frequency regulation system, and at the same time receives the primary frequency regulation action lockout signal from the primary frequency regulation system, locking the AGC regulation function during the primary frequency regulation action.

[0069] The frequency regulation method for the new energy power station also includes conducting a remote frequency regulation test on the new energy power station, wherein the remote frequency regulation test includes:

[0070] S10, the remote line monitoring unit monitors the primary frequency modulation (FM) activation and deactivation status signals, FM operation and reset signals in real time.

[0071] S20. The dispatching master station can obtain the primary frequency modulation (FM) activation and deactivation status signals, FM operation and reset signals in real time.

[0072] S30, the dispatch master station is equipped with a primary frequency modulation entry remote test signal and a primary frequency modulation exit remote test signal.

[0073] S40. The dispatching master station sends down the primary frequency modulation remote test simulation frequency. The primary frequency modulation device responds to the primary frequency modulation remote test simulation frequency and completes the primary frequency modulation performance remote test.

[0074] During the primary frequency regulation remote test, the primary frequency regulation device does not respond to the actual frequency signal of the power grid, but only to the simulated frequency of the primary frequency regulation remote test issued by the dispatch master station.

[0075] In the specific implementation plan, the real-time signals of primary frequency modulation under the primary frequency modulation control mode include: the on-time capacity, current active power, current frequency and control target power of the primary frequency modulation controlled object, the return value of the primary frequency modulation remote test simulation frequency, the primary frequency modulation entry and exit signals, the primary frequency modulation action and reset signals, the primary frequency modulation entry remote test signal, the primary frequency modulation entry and exit remote test, and the primary frequency modulation remote test simulation frequency.

[0076] In a specific implementation scheme, the primary frequency regulation limit of the primary frequency regulation control object under the primary frequency regulation control mode is ±6 of the rated active power of the primary frequency regulation control object.

[0077] In the specific frequency regulation implementation plan, the primary frequency regulation limit is: the change range of primary frequency regulation power of wind farms and photovoltaic power stations is ±6% of the rated active power, and the wind turbines and inverters shall not be disconnected from the grid or shut down due to primary frequency regulation.

[0078] In summary, the new energy power station frequency regulation system provided by this invention has the following advantages in the actual frequency regulation process of new energy power stations and in the participation of new energy power stations in grid frequency regulation: the time required for a single inverter to increase or decrease its rated power by 10% can be controlled within 1s-1.5s. By adding a primary frequency regulation device, a fast frequency response device, a PMU device, and a data transmission unit, and utilizing the existing grid network structure in the new energy power station, the system achieves the functions of frequency regulation and AGC control regulation of the power station respectively through signal interlocking when frequency regulation actions occur, and realizes the coordinated operation of the two functions. The new energy power station possesses primary frequency regulation capabilities, which can meet the grid's requirements for the primary frequency regulation function of the new energy power station. At the same time, it can effectively utilize the technical advantage of the high frequency regulation rate of the new energy power station to prevent large-scale power outages caused by sudden large power shortages leading to low-frequency load shedding, thus ensuring the safe and stable operation of the grid.

[0079] The above description is only a specific embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A frequency regulation system for a new energy power station, characterized in that, It includes a primary frequency regulation device, a PMU device, a fast frequency response device, a data transmission unit, an inverter execution unit, an energy storage device execution unit, a controllable unit execution unit, an AGC control unit, and a remote online monitoring unit; The primary frequency regulation device is connected to the PMU device, the primary frequency regulation device is connected to the gateway device, the gateway device is connected to the dispatch master station, the primary frequency regulation device is connected to the fast frequency response device, and the fast frequency response device is connected to the grid connection point of the new energy power station. The inverter execution unit, the energy storage device execution unit, and the controllable generator unit are respectively connected to the data transmission unit, and the AGC control unit and the primary frequency regulation device are respectively connected to the data transmission unit; The AGC control unit is connected to the primary frequency modulation device and the gateway device; the remote online monitoring unit is connected to the primary frequency modulation device and the remote online monitoring unit is connected to the dispatch master station.

2. The frequency regulation system for a new energy power station according to claim 1, characterized in that, The data transmission unit includes a data collector, a communication management unit, and a protocol converter. The data collector is connected to the communication management unit, and the protocol converter is also connected to the communication management unit.

3. The frequency regulation system for a new energy power station according to claim 1, characterized in that, The remote line monitoring unit includes a signal acquisition module and a signal storage module. The signal acquisition module is connected to the primary frequency modulation device, and the signal storage module is connected to the dispatch master station.

4. The frequency regulation system for a new energy power station according to claim 1, characterized in that, The primary frequency modulation device and the PMU device are connected by a 4mA to 20mA DC hardwire connection.

5. A frequency regulation method for a new energy power station, characterized in that, The frequency regulation method for the new energy power station adopts the new energy power station frequency regulation system according to any one of claims 1-4, and the frequency regulation method for the new energy power station includes the following steps: S1. The fast frequency response device directly collects the frequency and voltage current signals of the grid connection point of the new energy power station, calculates the corresponding active power, and transmits it to the primary frequency regulation device. S2. The primary frequency regulation device generates a frequency regulation active power target value adjustment command and a frequency regulation action signal, and transmits the frequency regulation active power target value adjustment command and frequency regulation action signal to the inverter execution unit, the energy storage device execution unit and the controllable unit execution unit, and at the same time sends the frequency regulation action signal to the AGC control unit. S3. When the frequency of the power station grid connection point exceeds the frequency regulation dead zone, the primary frequency regulation device performs primary frequency regulation control mode. The inverter execution unit, energy storage device execution unit and controllable unit respectively adjust the inverter, energy storage device and controllable unit according to their respective frequency regulation active power target value adjustment instructions and frequency regulation action signals. The AGC control unit locks out AGC regulation according to the frequency regulation action signal. S4. When the power grid frequency returns to normal, the primary frequency regulation device exits the primary frequency regulation control mode and generates a frequency regulation action reset signal to the AGC control unit, thereby opening the AGC regulation function and entering the AGC regulation control mode.

6. The frequency regulation method for a new energy power station according to claim 5, characterized in that, The frequency modulation control deviation of the primary frequency modulation control mode is controlled within ±1% of the start-up capacity of the primary frequency modulation control object.

7. The frequency regulation method for a new energy power station according to claim 5, characterized in that, The frequency regulation method for the new energy power station also includes conducting a remote frequency regulation test on the new energy power station, the remote frequency regulation test including: S10, The remote line monitoring unit monitors the primary frequency modulation (FM) activation and deactivation status signals, FM operation and reset signals in real time; S20. The dispatching master station can obtain the primary frequency modulation (FM) activation and deactivation status signals, FM actions, and reset signals in real time. S30. The dispatching master station is equipped with a primary frequency modulation (FM) entry signal for remote testing and a primary frequency modulation exit signal for remote testing. S40. The dispatching master station sends down the primary frequency modulation remote test simulation frequency. The primary frequency modulation device responds to the primary frequency modulation remote test simulation frequency and completes the primary frequency modulation performance remote test. During the primary frequency regulation remote test, the primary frequency regulation device does not respond to the actual frequency signal of the power grid, but only to the simulated frequency of the primary frequency regulation remote test issued by the dispatch master station.

8. The frequency regulation method for a new energy power station according to claim 5, characterized in that, The real-time signals of primary frequency modulation under the primary frequency modulation control mode include: the on-time capacity of the primary frequency modulation controlled object, the current active power, the current frequency and the control target power, the return value of the primary frequency modulation remote test simulation frequency, the primary frequency modulation entry and exit signals, the primary frequency modulation action and reset signals, the primary frequency modulation entry into remote test signals, the primary frequency modulation entry into and exit from remote test, and the primary frequency modulation remote test simulation frequency.

9. A frequency regulation method for a new energy power station according to claim 5, characterized in that, In the primary frequency regulation control mode, the primary frequency regulation limit of the primary frequency regulation control object is ±6% of the rated active power of the primary frequency regulation control object.

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