Frequency modulation test method, coordination controller and storage medium

Abstract

The invention discloses a frequency modulation test method, a coordination controller and a storage medium, belongs to the technical field of new energy power generation, is applied to the coordination controller, and comprises an energy storage simulation module and a frequency modulation module of an energy storage station. Determining energy storage adjustment active power; according to the energy storage adjusting active power, generating a first active adjusting instruction; a first active power adjustment instruction is sent to the energy storage simulation module, the first active power adjustment instruction is used for indicating the energy storage simulation module to simulate operation of the energy storage station according to the first active power adjustment instruction and preset operation parameters, first energy storage simulation power is obtained, and the first energy storage simulation power is fed back to the frequency modulation module; judging whether the first energy storage simulation power meets the frequency modulation requirement or not; according to the invention, test equipment such as an energy storage, conversion and boosting all-in-one machine and a battery compartment is not needed, and the test difficulty of the frequency modulation function of the coordination controller is reduced.

Description

Technical Field

[0001] This application relates to the field of new energy power generation technology, specifically to frequency regulation testing methods, coordination controllers, and storage media. Background Technology

[0002] In new energy power generation systems, the frequency regulation function of the coordinating controller is crucial for ensuring grid frequency stability. However, the testing equipment for this function, such as the integrated energy storage converter and boost converter, and the battery compartment, is bulky and complex, making the testing of the coordinating controller's frequency regulation function quite challenging. Summary of the Invention

[0003] The main purpose of this application is to provide a frequency modulation test method, a coordination controller, and a storage medium, which aims to at least partially solve the aforementioned technical problems.

[0004] Firstly, a frequency regulation testing method is provided, applied to a coordination controller, which includes an energy storage simulation module and a frequency regulation module of an energy storage station. The method includes: The frequency regulation module determines the active power of energy storage regulation based on the received grid frequency, preset frequency adjustment dead zone and droop coefficient; The frequency regulation module adjusts the active power based on the energy storage and generates the first active power regulation command; The frequency modulation module sends a first active power regulation command to the energy storage simulation module. The first active power regulation command is used to instruct the energy storage simulation module to simulate the operation of the energy storage station according to the first active power regulation command and preset operating parameters, obtain the first energy storage simulation power, and feed back the first energy storage simulation power to the frequency modulation module. The frequency modulation module determines whether the simulated power of the first energy storage meets the frequency modulation requirements.

[0005] In some of these design approaches, frequency modulation requirements include command response speed requirements, and the coordinating controller also includes a command detection module; After generating the first active power regulation command based on the active power regulated by energy storage, the method also includes: Send the first active power adjustment command to the command detection module; Determine whether the time interval between the acquisition time of the power grid frequency and the output time of the first active power regulation command is less than a preset time interval, wherein the output time is the time when the command detection module outputs the first active power regulation command; When the time between the acquisition time and the output time is less than the preset time, the command response speed of the coordinating controller is determined to meet the command response speed requirement.

[0006] In some of these design approaches, frequency modulation requirements include secondary regulation requirements; Before determining whether the simulated power of the first energy storage meets the frequency regulation requirements, the method also includes: When the first power difference between the active power of energy storage regulation and the total power of the first simulated energy storage is greater than a preset threshold, a second active power regulation command is generated based on the first power difference. Send a second active power regulation command to the energy storage simulation module. The second active power regulation command is used to instruct the energy storage simulation module to simulate the operation of the energy storage station according to the second active power regulation command and preset operating parameters, obtain the second energy storage simulation power, and feed back the second energy storage simulation power to the frequency regulation module. Determining whether the simulated power of the first energy storage meets the frequency regulation requirements includes: Determine whether the total power of the second simulated energy storage power is the same as the active power of energy storage regulation. When the total power of the second energy storage simulation power is the same as the active power of energy storage regulation, it is determined that the coordination controller meets the secondary regulation requirements.

[0007] In some of these design approaches, frequency regulation requirements include active power allocation requirements, and the energy storage simulation module includes multiple energy storage simulation units, with the first energy storage simulation power being multiple. Based on the active power regulated by energy storage, a first active power regulation command is generated, including: Based on the active power regulation of energy storage and the preset active power allocation mode, multiple first active power regulation commands are generated, wherein one energy storage simulation unit corresponds to one first active power regulation command. Send the first active power regulation command to the energy storage simulation module, including: The first active power adjustment command is sent to each energy storage simulation unit respectively. The first active power adjustment command is used to instruct the corresponding energy storage simulation unit to allocate active power adjustment commands and preset operating parameters according to the preset active power allocation mode, simulate the operation of the energy storage station, obtain the first energy storage simulation power, and feed back the first energy storage simulation power to the frequency regulation module. Determining whether the simulated power of the first energy storage meets the frequency regulation requirements includes: Determine whether the power distribution mode of each first energy storage simulation meets the active power distribution requirements corresponding to the preset active power distribution mode.

[0008] In some of these design approaches, frequency regulation requirements include active power regulation command blocking requirements, and preset operating parameters include the state of charge (SOC) of the energy storage simulation unit in the energy storage simulation module. Based on the active power regulated by energy storage, a first active power regulation command is generated, including: Adjust the SOC of the target energy storage simulation unit in the energy storage simulation module to be greater than the preset upper limit of SOC, or adjust the SOC of the target energy storage simulation unit to be less than the preset lower limit of SOC. The first active power regulation command is generated based on the active power of energy storage regulation and the SOC of the target energy storage simulation unit. Determining whether the simulated power of the first energy storage meets the frequency regulation requirements includes: Determine whether the target energy storage simulation power fed back by the target energy storage simulation unit is zero; When the target energy storage simulated power is zero, the coordinating controller is determined to meet the active power regulation command blocking requirements.

[0009] In some of these design approaches, frequency regulation requirements include advanced coordination requirements for Automatic Generation Control (AGC). Based on the active power regulated by energy storage, a first active power regulation command is generated, including: Based on the active power of energy storage regulation and the first AGC active power regulation command of the AGC system, generate the first active power regulation command; Before determining whether the simulated power of the first energy storage meets the frequency regulation requirements, the method also includes: Adjust the first AGC active power adjustment command to obtain a second AGC active power adjustment command with the same adjustment direction as the first AGC active power adjustment command; Based on the active power regulation of energy storage and the active power regulation command of the second AGC, a third active power regulation command is generated; Send a third active power regulation command to the energy storage simulation module. The third active power regulation command is used to instruct the energy storage simulation module to simulate the operation of the energy storage station according to the third active power regulation command and preset operating parameters, obtain the third energy storage simulation power, and feed back the third energy storage simulation power to the frequency regulation module. Determining whether the simulated power of the first energy storage meets the frequency regulation requirements includes: Determine whether the second power difference between the total power of the third energy storage simulated power and the total power of the first energy storage simulated power, and the third power difference between the second active power regulation command and the first active power regulation command are the same; When the second power difference is the same as the third power difference, it is determined that the coordination controller meets the advanced coordination requirements of AGC. When the second power difference is different from the third power difference, it is determined that the coordination controller does not meet the advanced coordination requirements of AGC.

[0010] In some design approaches, adjusting the first AGC active power regulation command to obtain a second AGC active power regulation command with the same regulation direction as the first AGC active power regulation command includes: Adjust the first AGC active power adjustment command to obtain a second AGC active power adjustment command with the opposite adjustment direction to the first AGC active power adjustment command; Determining whether the second power difference between the total power of the third simulated energy storage power and the total power of the first simulated energy storage power, and the third power difference between the second active power regulation command and the first active power regulation command, includes: Determine whether the fourth power difference between the total power of the third simulated energy storage power and the total power of the first simulated energy storage power is zero; When the fourth power difference is zero, it is determined that the coordination controller meets the advanced coordination requirements of AGC. When the fourth power difference is not zero, it is determined that the coordination controller does not meet the advanced coordination requirements of AGC.

[0011] In some of these design approaches, the step of generating the first active power regulation command based on the active power regulated by energy storage includes: The first active power regulation command is generated based on any one of the preset limiting coefficient, preset static loss compensation, preset charging compensation coefficient, preset discharging compensation coefficient, preset slip lockout threshold, preset large frequency difference lower limit threshold, and preset large frequency difference upper limit threshold, as well as the active power of energy storage regulation.

[0012] Secondly, a coordination controller is also provided, including an energy storage simulation module and a frequency regulation module for an energy storage station. The energy storage simulation module is used to simulate the operation of the energy storage station, and the frequency regulation module is used to execute any of the design methods described above.

[0013] Thirdly, a computer-readable storage medium is also provided, on which a computer program is stored, which is loaded by a processor to perform the steps in any of the above-described methods or design schemes.

[0014] The above technical solution adds an energy storage simulation module to the coordinating controller, which interacts with the frequency regulation module. The frequency regulation module controls the energy storage simulation module to simulate the operation of the energy storage station and provides feedback on the simulated energy storage power. This allows the frequency regulation module to determine whether the simulated energy storage power output of the simulated energy storage module meets the frequency regulation requirements, thus enabling frequency regulation testing of the coordinating controller. Therefore, it eliminates the need for testing equipment such as an integrated energy storage converter and battery compartment. Furthermore, various frequency regulation functions of the coordinating controller can be tested simply by adjusting the control parameters of the frequency regulation module and the preset operating parameters of the energy storage simulation module, reducing the testing difficulty of the coordinating controller's frequency regulation function. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of a frequency modulation test system provided in some embodiments of this application; Figure 2 This is a circuit schematic diagram of a frequency sampling module provided in some embodiments of this application; Figure 3 This is a flowchart illustrating a frequency modulation testing method provided in some embodiments of this application.

[0017] The realization of the objectives, functional features and advantages of the embodiments of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0019] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0020] The use of "applies to" or "configured to" in this application implies open and inclusive language, which does not exclude the applicability to or configuration to devices performing additional tasks or steps. Additionally, the use of "based on" implies openness and inclusivity, because processes, steps, calculations, or other actions "based on" one or more of the stated conditions or values ​​may in practice be based on additional conditions or values ​​beyond those stated.

[0021] In this application, the term "exemplary" is used to mean "used as an example, illustration, or description." Any embodiment described as "exemplary" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use this application. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that this application can be made without using these specific details. In other instances, well-known structures and processes are not described in detail to avoid obscuring the description of this application with unnecessary detail. Therefore, this application is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0022] On the one hand, this embodiment provides a frequency modulation test method, applied to a coordination controller, such as... Figure 1As shown, the coordination controller may include an energy storage simulation module and a frequency regulation module for the energy storage station. The energy storage simulation module is used to simulate the operation of the energy storage station, and the frequency regulation module is used to perform the methods in any of the embodiments below.

[0023] It should be noted that in a renewable energy power plant, frequency regulation can be achieved by continuously monitoring the grid's operating status through a coordinating controller. When the grid frequency is detected to be outside the normal frequency range or is expected to be outside the normal frequency range, the power of the energy storage station is adjusted. The energy storage station can include at least one energy storage unit, and the corresponding energy storage simulation module can include at least one energy storage simulation unit. The following embodiments illustrate this by assuming the energy storage simulation module includes multiple energy storage simulation units. Frequency regulation in a renewable energy power plant can include primary frequency regulation and secondary frequency regulation, etc. The following embodiments illustrate this by focusing on primary frequency regulation.

[0024] Understandably, the frequency regulation module in the coordinating controller can be used to implement primary frequency regulation. This module also includes an independent analog parameter adjustment function. This function comprises the function control word of the energy storage simulation module, used to adjust the preset operating parameters of each energy storage simulation unit. Each energy storage simulation unit can include a simulated PCS (Power Conversion System) and a simulated battery pack. The analog parameter adjustment function is used to adjust the number of simulated PCS connected and to set preset operating parameters for each PCS, such as operating status, real-time active power, real-time reactive power, active power setpoint, reactive power setpoint, rated capacity, SOC of the simulated battery pack, maximum chargeable active power, maximum dischargeable active power, maximum adjustable reactive power, command response status, and command response lag time. This allows the energy storage simulation module to simulate various operating conditions of the energy storage station based on the active power regulation commands from the coordinating controller.

[0025] In addition, the coordination controller may also include a frequency sampling module and a command detection module, both connected to the frequency modulation module. The frequency sampling module is used to collect grid voltage, calculate grid frequency, and transmit it to the frequency modulation module. The command detection module is used to receive active power regulation commands sent by the frequency modulation module and transmit these commands remotely via optical fiber.

[0026] like Figure 2As shown, the frequency sampling module may include a current transformer T1, operational amplifier U1, operational amplifier U2, and operational amplifier U3. One end of the primary winding of the current transformer T1 is used to connect to the live wire of the AC power supply through resistor R1, and the other end is used to connect to the neutral wire of the AC power supply through resistor R2, thus connecting to the grid voltage. One end of the secondary winding of transformer T1 is connected to one end of resistor R1, one end of capacitor C1, one end of capacitor C3, and one end of resistor R4. The other end of capacitor C1 is grounded to GND. The other end of resistor R3 is connected to the other end of the secondary winding, one end of capacitor C2, one end of capacitor C3, and one end of capacitor C4. The other end of capacitor C2 is grounded to GND. The other end of resistor R4 is connected to the other end of capacitor C4 and one end of resistor R5. The other end of resistor R5 is connected to one end of capacitor C5 and the positive input terminal of operational amplifier U1. The other end of capacitor C5 is grounded to VSSA. The negative input terminal of operational amplifier U1 is connected to the output terminal of operational amplifier U1, one end of resistor R7, and one end of resistor R6. The other end of resistor R7 is connected to the reference voltage REF, one end of capacitor C6, and the positive input terminal of operational amplifier U2. The other end of resistor R6 is connected to the other end of capacitor C6, one end of resistor R8, and one end of resistor R9. The other end of resistor R8 is connected to... The negative input terminal of operational amplifier U2 is connected to one end of capacitor C7. The output terminal of operational amplifier U2 is connected to the other end of capacitor C7, the other end of resistor R9, and one end of resistor R10. The power supply terminal of operational amplifier U2 is connected to the supply voltage VDDA. The ground terminal of operational amplifier U2 is grounded to VSSA. The other end of resistor R10 is connected to one end of capacitor C9 and the negative input terminal of operational amplifier U3. The positive input terminal of operational amplifier U2 is connected to the other end of capacitor C9 and the reference voltage REF. The power supply terminal of operational amplifier U3 is connected to the supply voltage VDDA. The ground terminal of operational amplifier U3 is grounded to VSSA. The output terminal of operational amplifier U3 is connected to one end of resistor R12 and one end of resistor R11. The other end of resistor R12 is connected to the supply voltage VDDA. The other end of resistor R11 is connected to the frequency modulation module and one end of capacitor C8. The other end of capacitor C8 is grounded to VSSA. This is used to output the acquired grid frequency Fre to the frequency modulation module.

[0027] Understandably, the frequency sampling module can be used to acquire the grid voltage of any one phase of a three-phase AC power supply and output the corresponding grid frequency. In practical use, a three-phase voltage tester can acquire the three-phase grid voltage of the three-phase AC power supply. The frequency sampling module is connected to the three-phase voltage tester to acquire the grid voltage of any one phase, calculate the grid frequency, and transmit it to the frequency modulation module. During frequency modulation testing, the grid voltage can be a preset simulated grid voltage. The three-phase simulated grid voltage is acquired by the three-phase voltage tester and input to the frequency sampling module, allowing the module to acquire the simulated grid voltage and calculate the grid frequency. In this case, the simulated grid frequency of the three-phase AC power supply can be adjusted according to actual testing requirements.

[0028] The instruction detection module may include a smart PI (Performance Indicator) component, which can output the active power regulation instructions received from the frequency regulation module in the form of GOOSE (Generic Object Oriented Substation Event) messages.

[0029] Additionally, it should be noted that the frequency regulation module can also receive AGC (Automatic Generation Control) active power regulation commands from the AGC system to perform a primary frequency regulation. During frequency regulation testing, the module can receive simulated AGC active power regulation commands, which are then superimposed with the simulated energy storage power to perform the frequency regulation test. The simulated AGC active power regulation commands can be adjusted according to actual testing requirements.

[0030] In some embodiments, the frequency modulation test method can be executed based on the frequency modulation module described above. For example... Figure 3 As shown, the frequency modulation test method may include the following steps.

[0031] Step S100: The frequency regulation module determines the active power of energy storage regulation based on the received grid frequency, preset frequency adjustment dead zone and droop coefficient.

[0032] In some embodiments, before step S100, the frequency modulation test method may further include: the frequency sampling module acquiring the grid voltage and outputting the corresponding grid frequency according to the grid voltage.

[0033] It is understandable that the grid voltage can be a simulated grid voltage. The grid frequency is the voltage frequency of the simulated grid voltage, which is obtained by the frequency sampling module acquiring the grid voltage and calculating it. During actual frequency regulation testing, the grid voltage input to the frequency sampling module can be adjusted according to actual test requirements to simulate the frequency regulation function of the coordinating controller under different grid frequencies. The preset frequency adjustment deadband can include an upper limit for the frequency adjustment deadband.f H and frequency adjustment dead zone lower limit f L The droop coefficient can be set according to the regulation capacity of the energy storage station. When the frequency regulation module receives the grid frequency sent by the frequency sampling module, it can use Formula 1 to determine the active power of energy storage regulation based on the received grid frequency, the preset frequency regulation dead zone, and the droop coefficient. Formula 1 is as follows:

[0034] ΔP Regulating active power for energy storage ， % P is the droop coefficient for primary frequency modulation. e This refers to the rated active power of the energy storage station. f For the power grid frequency, f N This is the rated power grid frequency.

[0035] Step S200: The frequency modulation module generates the first active power regulation command based on the energy storage adjustment of active power.

[0036] It should be noted that the active power for energy storage regulation can be the power that the energy storage simulation module needs to output or absorb during primary frequency regulation. The first active power regulation command can be a charging power command or a discharging power command from the energy storage simulation unit in the energy storage simulation module. The number of first active power regulation commands, the number of first energy storage simulation powers, the number of third active power regulation commands, and the number of third energy storage simulation powers are all the same as the number of energy storage simulation units in the energy storage simulation module. The number of energy storage simulation units can be set according to actual testing requirements.

[0037] Understandably, the frequency regulation module can combine the preset active power distribution mode and the preset operating parameters of the energy storage simulation module to distribute the energy storage regulation active power to the charging power or discharging power of each energy storage simulation unit in the energy storage simulation module. Based on the allocated power of each energy storage simulation unit, it generates the first active power regulation command for each energy storage simulation unit and distributes the energy storage regulation active power to the normally operating energy storage simulation units in the energy storage simulation module according to the distribution mode.

[0038] The preset active power allocation mode can include an average allocation mode, a rated power-based allocation mode, and a SOC-based allocation mode. Preset operating parameters can include the operating status of each energy storage simulation unit, rated capacity, SOC of the simulated battery pack, maximum chargeable active power, maximum dischargeable active power, maximum adjustable reactive power, command response status, and command response lag time. In actual testing, the specific energy storage active power allocation mode settings and preset operating parameter settings are as described in the frequency regulation test method in the following embodiment.

[0039] Step S300: The frequency modulation module sends the first active power regulation command to the energy storage simulation module.

[0040] The first active power regulation command is used to instruct the energy storage simulation module to simulate the operation of the energy storage station according to the first active power regulation command and preset operating parameters, obtain the first energy storage simulation power, and feed back the first energy storage simulation power to the frequency regulation module.

[0041] It should be noted that during frequency regulation testing, after the frequency regulation module generates the first active power regulation command for each energy storage simulation unit, it sends the corresponding first active power regulation command to each energy storage simulation unit. Each simulated energy storage unit can receive the first active power regulation command, and based on the active power command value corresponding to the first active power regulation command, combined with the preset operating parameter settings of the simulated PCS, it can obtain the corresponding first simulated energy storage power and feed it back to the frequency regulation module. In actual testing, the specific situation of the simulated energy storage power fed back by each energy storage simulation unit is as follows: the frequency regulation testing method in the following embodiment.

[0042] Step S400: The frequency modulation module determines whether the simulated power of the first energy storage meets the frequency modulation requirements.

[0043] It should be noted that the frequency modulation module receives the first simulated energy storage power from each simulated energy storage unit, and can then test the frequency modulation function of the coordinating controller based on whether each first simulated energy storage power meets the corresponding frequency modulation requirements.

[0044] Understandably, in the actual use of the coordinated controller, after the frequency modulation module calculates the active power of energy storage regulation, it can also superimpose the active power of energy storage regulation with static loss compensation and AGC active power regulation commands, and then multiply it by the charging compensation coefficient or discharging compensation coefficient of the energy storage station to generate an active power regulation command, controlling the energy storage station to perform primary frequency regulation. Therefore, during frequency regulation testing, the frequency modulation module can also set preset parameters such as static loss compensation, AGC active power regulation commands, preset charging compensation coefficients, and preset discharging compensation coefficients according to actual test requirements to conduct different frequency regulation function tests. The frequency regulation functions of the coordinated controller can include command response lag function, secondary regulation function, active power allocation function, active power regulation command interlocking function, advanced coordination function, primary frequency regulation limiting function, static loss compensation function, charging / discharging compensation function, frequency slip interlocking function, and large frequency difference function, etc. Correspondingly, frequency modulation requirements may include command response speed requirements, secondary regulation requirements, active power allocation requirements, active power regulation command interlocking requirements, AGC advanced coordination requirements, primary frequency modulation limiting requirements, static loss compensation requirements, charging / discharging compensation requirements, frequency slip interlocking requirements, and large frequency difference requirements. In specific frequency modulation tests, the specific testing methods for different frequency modulation functions are as described in the frequency modulation test methods in the implementation plan below.

[0045] In some embodiments, after step S200, the frequency regulation test method may further include: sending a first active power regulation command to a command detection module; determining whether the time between the acquisition time of the grid frequency and the output time of the first active power regulation command is less than a preset time, wherein the output time is the time when the command detection module outputs the first active power regulation command; when the time between the acquisition time and the output time is less than the preset time, determining that the command response speed of the coordinating controller meets the command response speed requirement.

[0046] It should be noted that the preset duration can be the target response time of the coordinated controller. When the time from receiving the grid voltage to outputting the first active power regulation command is less than the preset duration, it indicates that the coordinated controller's command response speed meets the command response speed requirement. Specifically, by detecting the timing of grid voltage acquisition and the timing of the first active power regulation command output by the command detection module, the response time of the coordinated controller can be monitored, thus achieving command response speed testing. The preset duration can be set according to actual functional requirements; in one example, the preset duration is 100ms.

[0047] Understandably, during command response speed testing, when the energy storage simulation module includes one energy storage simulation unit, the frequency regulation module generates a first active power regulation command and outputs this command to the command detection module. The output time is the moment when the command detection module outputs the first active power regulation command. When the energy storage simulation module includes multiple energy storage simulation units, the frequency regulation module can generate multiple first active power regulation commands corresponding one-to-one with the multiple energy storage simulation units, and send these multiple first active power regulation commands to the command detection module. Correspondingly, the output time is the moment when the command detection module outputs the last first active power regulation command.

[0048] In some embodiments, frequency modulation requirements include secondary regulation requirements.

[0049] Before step S400, the frequency regulation test method may further include: when the first power difference between the total power of the energy storage regulated active power and the first energy storage simulated power is greater than a preset threshold, generating a second active power regulation command based on the first power difference; sending the second active power regulation command to the energy storage simulation module, the second active power regulation command being used to instruct the energy storage simulation module to simulate the operation of the energy storage station according to the second active power regulation command and preset operating parameters, obtaining the second energy storage simulated power, and feeding back the second energy storage simulated power to the frequency regulation module.

[0050] Correspondingly, step S400 may include: determining whether the total power of the second energy storage simulated power is the same as the active power of energy storage regulation; when the total power of the second energy storage simulated power is the same as the active power of energy storage regulation, determining that the coordination controller meets the secondary regulation requirements.

[0051] Understandably, during a frequency regulation process, if the grid frequency is not adjusted to the normal frequency range after the first adjustment, a second adjustment is required. Therefore, this embodiment can also simulate the second adjustment process of the coordination controller, realizing the testing of the coordination controller's second adjustment function.

[0052] In this embodiment, the first active power regulation command is the power control command of a simulated energy storage unit during the first regulation process. The first simulated energy storage power is the power of a simulated energy storage unit after the first regulation. The second active power regulation command is the power control command of a simulated energy storage unit during the second regulation process. The second simulated energy storage power is the power of a simulated energy storage unit after the second regulation. After the first regulation, if the first power difference is greater than a preset threshold, it indicates that the grid frequency has not been regulated to the normal frequency range. After a preset time interval, a second regulation can be performed based on the first power difference. When the total power of the second simulated energy storage power is the same as the active power of the energy storage regulation, it indicates that the grid frequency can be regulated to the normal frequency range after the second regulation. Then, the coordinating controller meets the requirements of the second regulation and has the function of second regulation. The preset threshold and preset time can be set according to the actual regulation accuracy, etc. In one example, the preset time interval can be 0.5 seconds. When the energy storage simulation module includes an energy storage simulation unit, the total power of the first simulated energy storage power is the first simulated energy storage power fed back by that energy storage simulation unit. When the energy storage simulation module includes multiple energy storage simulation units, the total power of the first energy storage simulation power is the sum of the first energy storage simulation power fed back by each energy storage simulation unit.

[0053] In one example, the rated grid frequency is set. f N The frequency is 50Hz, and the rated active power P of the energy storage station is... e For 10MW, the primary frequency regulation droop coefficient % The lower limit of the frequency adjustment dead zone is 2%. f L The frequency is set to 49.95Hz, with a preset upper limit of SOC of 95%, a preset lower limit of SOC of 5%, a preset static loss compensation of 0.15MW, a preset charging compensation coefficient k1 of 1, a preset discharging compensation coefficient k2 of 1, and an AGC active power regulation command value of 3MW. The number of simulated energy storage units is set to 3. The first simulated energy storage unit has a PCS rated power of 3MW and an SOC of 40%, the second simulated energy storage unit has a PCS rated power of 3MW and an SOC of 30%, and the third simulated energy storage unit has a PCS rated power of 4MW and an SOC of 30%. The grid frequency is adjusted to 49.65Hz, resulting in a calculated active power regulation value of 6.15MW.

[0054] During the frequency regulation test, the first simulated energy storage unit was set to not respond to the command, the second simulated energy storage unit responded to the command, and the third simulated energy storage unit responded to the command. The AGC active power regulation command value was 0MW, and the input voltage frequency of the three-phase voltage tester was 49.65Hz. The obtained energy storage regulation active power was 3.15MW. After the first adjustment, the first simulated energy storage unit reported a first simulated energy storage power of 0MW, the second simulated energy storage unit reported a first simulated energy storage power of 1.05MW, and the third simulated energy storage unit reported a first simulated energy storage power of 1.05MW. After a 0.5S delay, a second adjustment was performed. The first simulated energy storage unit reported a first simulated energy storage power of 0MW, the second simulated energy storage unit reported a first simulated energy storage power of 1.55MW, and the third simulated energy storage unit reported a first simulated energy storage power of 1.55MW. This indicates that the coordinating controller meets the secondary frequency regulation requirements.

[0055] In some embodiments, frequency regulation requirements include active power allocation requirements, the energy storage simulation module includes multiple energy storage simulation units, and the number of first energy storage simulation powers is multiple.

[0056] Step S200 may include: generating multiple first active power adjustment commands based on the active power adjustment of energy storage and the preset active power allocation mode.

[0057] One energy storage simulation unit corresponds to one first active power regulation command.

[0058] Correspondingly, step S300 may include: sending the corresponding first active power adjustment command to each energy storage simulation unit.

[0059] The first active power regulation command is used to instruct the corresponding energy storage simulation unit to allocate active power regulation commands and preset operating parameters according to the preset active power allocation mode, simulate the operation of the energy storage station, obtain the first energy storage simulation power, and feed back the first energy storage simulation power to the frequency regulation module.

[0060] Correspondingly, step S400 may include: determining whether the allocation mode of each first energy storage simulated power meets the active power allocation requirements corresponding to the preset active power allocation mode.

[0061] It should be noted that the rated power allocation mode allocates the energy storage regulating active power based on the rated power of the PCS in each energy storage simulation unit, the SOC allocation mode allocates the energy storage regulating active power based on the real-time SOC of each simulated battery pack in each energy storage simulation unit, and the average allocation mode distributes the energy storage regulating active power evenly to each energy storage simulation unit.

[0062] Understandably, in the rated power allocation mode, the allocation ratio of the simulated power of each first energy storage unit is the same as the allocation ratio of the rated power of the PCS in each energy storage simulation unit. Therefore, the coordination controller meets the active power allocation requirements of the rated power allocation mode and possesses the rated power allocation function. In the SOC allocation mode, the allocation ratio of the simulated power of each first energy storage unit is the same as the allocation ratio of the real-time SOC of the simulated battery packs in each energy storage simulation unit. Therefore, the coordination controller meets the active power allocation requirements of the SOC allocation mode and possesses the SOC allocation function. In the average allocation mode, the simulated power of each first energy storage unit is the same. Therefore, the coordination controller meets the active power allocation requirements of the average allocation mode and possesses the average allocation function.

[0063] In one example, the rated grid frequency is set. f N The frequency is 50Hz, and the rated active power P of the energy storage station is... e The droop coefficient for primary frequency regulation is 10MW. % The lower limit of the frequency adjustment dead zone is 2%. f L The frequency is set to 49.95 Hz, with a preset upper limit of SOC of 95%, a preset lower limit of SOC of 5%, a preset static loss compensation of 0.15 MW, a preset charging compensation coefficient k1 of 1, a preset discharging compensation coefficient k2 of 1, and an AGC active power regulation command of 3 MW. The number of simulated energy storage units is set to 3. In the first simulated energy storage unit, the rated power of the PCS is 3 MW and the SOC is 40%. In the second simulated energy storage unit, the rated power of the PCS is 3 MW and the SOC is 30%. In the third simulated energy storage unit, the rated power of the PCS is 4 MW and the SOC is 30%. The grid frequency is adjusted to 49.65 Hz, resulting in a calculated active power regulation capacity of 6.15 MW.

[0064] When the preset active power allocation mode is based on the rated power allocation mode, three first control commands are generated based on 6.15MW and the rated power allocation mode, respectively controlling the first simulated energy storage unit, the second simulated energy storage unit, and the third simulated energy storage unit to simulate the operation of the energy storage station. If the first simulated energy storage power fed back by the first simulated energy storage unit is 1.845MW, the first simulated energy storage power fed back by the second simulated energy storage unit is 1.845MW, and the first simulated energy storage power fed back by the third simulated energy storage unit is 2.46MW, it indicates that the coordinating controller has the rated power allocation function.

[0065] When the preset active power distribution mode is SOC-based distribution mode, if the first simulated energy storage power reported by the first simulated energy storage unit is 2.46MW, the first simulated energy storage power reported by the second simulated energy storage unit is 1.845MW, and the first simulated energy storage power reported by the third simulated energy storage unit is 1.845MW, then it indicates that the coordinating controller has SOC-based distribution function.

[0066] When the preset active power distribution mode is the average distribution mode, if the first simulated energy storage power fed back by the first simulated energy storage unit is 2.05MW, the first simulated energy storage power fed back by the second simulated energy storage unit is 2.05MW, and the first simulated energy storage power fed back by the third simulated energy storage unit is 2.05MW, it indicates that the coordinating controller has the average distribution function.

[0067] In some embodiments, frequency regulation requirements include active power regulation command blocking requirements, and preset operating parameters include the state of charge (SOC) of the energy storage simulation unit in the energy storage simulation module.

[0068] Correspondingly, before step S200, the frequency regulation test method may also include: adjusting the SOC of the target energy storage simulation unit in the energy storage simulation module to be greater than the preset SOC upper limit; generating a first active power regulation command based on the active power of energy storage regulation and the SOC of the target energy storage simulation unit.

[0069] Step S400 may include: determining whether the target energy storage simulation power fed back by the target energy storage simulation unit is zero; when the target energy storage simulation power is zero, determining that the coordinating controller meets the active power regulation command blocking requirement.

[0070] It should be noted that when the SOC of the target energy storage simulation unit is greater than the preset SOC upper limit, during a single frequency regulation process, if the grid frequency is greater than the maximum frequency within the normal frequency range, the target energy storage simulation unit cannot be controlled to charge due to its excessively high SOC. Therefore, in actual testing, when the SOC of the target energy storage simulation unit is set to be greater than the preset SOC upper limit, the grid frequency input to the frequency regulation module is adjusted to be greater than the maximum frequency within the normal frequency range. Then, when the target energy storage simulation power reported by the target energy storage simulation unit is zero, it can be determined that the coordinating controller meets the active power regulation command blocking requirement and possesses the active power regulation command blocking function.

[0071] Understandably, during actual testing, when the energy storage simulation module includes an energy storage simulation unit, the frequency regulation module can use that energy storage simulation unit as the target energy storage simulation unit, adjust the SOC of the target energy storage simulation unit to the preset SOC upper limit, generate a first active power regulation command based on the active power of energy storage regulation and the SOC of the target energy storage simulation unit, and send the first active power regulation command to the target energy storage simulation unit. Based on whether the target energy storage power returned by the target energy storage simulation unit is zero, it is determined whether the coordinating controller meets the active power regulation command blocking requirement.

[0072] When the energy storage simulation module includes multiple energy storage simulation units, the frequency regulation module can use at least one of the multiple energy storage simulation units as the target energy storage simulation unit, adjust the SOC of each target energy storage simulation unit to a preset SOC upper limit, generate multiple first active power regulation commands based on the energy storage regulation active power and the SOC of the target energy storage simulation units, and send the multiple first active power regulation commands to their respective corresponding energy storage simulation units. The controller determines whether the active power regulation command blocking requirement is met based on whether the target energy storage power returned by the target energy storage simulation unit is zero. Preferably, the target energy storage simulation unit is any one of the multiple energy storage simulation units. The regulation power of the first active power regulation command corresponding to the target energy storage simulation unit is zero.

[0073] In addition, before step S200, the frequency regulation test method may also include: adjusting the SOC of the target energy storage simulation unit to be less than a preset lower limit of SOC; generating a first active power regulation command based on the active power of energy storage regulation and the SOC of the target energy storage simulation unit.

[0074] Step S400 may include: determining whether the target energy storage simulation power fed back by the target energy storage simulation unit is zero; when the target energy storage simulation power is zero, determining that the coordinating controller meets the active power regulation command blocking requirement.

[0075] It should be noted that when the SOC of the target energy storage simulation unit is less than the preset lower limit of SOC, during the first frequency regulation process, if the grid frequency is less than the minimum frequency of the normal frequency range, the target energy storage simulation unit cannot be controlled to discharge due to its low SOC. Therefore, in the actual testing process, when the SOC of the target energy storage simulation unit is set to be less than the preset lower limit of SOC, the grid frequency input to the frequency regulation module is adjusted to be less than the minimum frequency of the normal frequency range. Then, when the target energy storage simulation power fed back by the target energy storage simulation unit is zero, it can be determined that the coordinating controller meets the active power regulation command blocking requirement and has the active power regulation command blocking function. The method for determining the target energy storage simulation unit is the same as in the above embodiment.

[0076] In one example, the rated grid frequency is set. fN The frequency is 50Hz, and the rated active power P of the energy storage station is... e For 10MW, the primary frequency regulation droop coefficient % The lower limit of the frequency adjustment dead zone is 2%. f L The frequency is 49.95Hz. The preset upper limit of the SOC of the energy storage simulation unit is 95%, the preset lower limit of the SOC of the energy storage simulation unit is 5%, the preset static loss compensation is 0.15MW, the preset charging compensation coefficient k1 is 1, the preset discharging compensation coefficient k2 is 1, and the number of simulated energy storage units is set to 3. The rated power of the PCS in the first simulated energy storage unit is 3MW and the SOC is 98%. The rated power of the PCS in the second simulated energy storage unit is 3MW and the SOC is 50%. The rated power of the PCS in the third simulated energy storage unit is 4MW and the SOC is 3%. When the grid frequency is 49.65Hz, the calculated active power of energy storage regulation is 3.15MW. At this time, it can be determined whether the first simulated active power fed back by the third simulated energy storage unit is 0MW to determine whether the coordinating controller has the active power regulation command blocking function. When the grid frequency is 50.35Hz, the calculated active power of energy storage regulation is -2.85MW. At this time, it can be determined whether the first simulated active power fed back by the first simulated energy storage unit is 0MW, so as to determine whether the coordinating controller has the active power regulation command blocking function.

[0077] In some embodiments, frequency regulation requirements include advanced coordination requirements for Automatic Generation Control (AGC).

[0078] Correspondingly, step S200 may include: generating a first active power regulation command based on the active power regulation of energy storage and the first AGC active power regulation command of the AGC system.

[0079] Before step S400, the frequency regulation test method may further include: adjusting the first AGC active power regulation command to obtain a second AGC active power regulation command with the same regulation direction as the first AGC active power regulation command; generating a third active power regulation command based on the energy storage regulating active power and the second AGC active power regulation command; and sending the third active power regulation command to the energy storage simulation module.

[0080] The third active power regulation command is used to instruct the energy storage simulation module to simulate the operation of the energy storage station according to the third active power regulation command and preset operating parameters, obtain the third energy storage simulation power, and feed back the third energy storage simulation power to the frequency regulation module.

[0081] Step S400 may include: determining whether the second power difference between the total power of the third energy storage simulated power and the total power of the first energy storage simulated power, and the third power difference between the second active power regulation command and the first active power regulation command are the same; when the second power difference and the third power difference are the same, determining that the coordination controller meets the advanced coordination requirements of AGC; when the second power difference and the third power difference are not the same, determining that the coordination controller does not meet the advanced coordination requirements of AGC.

[0082] It should be noted that when the power corresponding to the AGC active power adjustment command of the AGC system is not zero, the coordination controller also needs to add the AGC adjustment power corresponding to the AGC active power adjustment command to the energy storage adjustment active power to generate the first active power adjustment command of each energy storage simulation unit for adjustment. After the first adjustment, the AGC active power adjustment command can be adjusted for a second adjustment to verify the advanced coordination function of the coordination controller.

[0083] It is understandable that the adjustment direction can be the direction of power change indicated by the AGC active power adjustment command. The first AGC active power adjustment command is the AGC active power adjustment command in the first adjustment process, and the second AGC active power adjustment command is the AGC active power adjustment command in the second adjustment process. The AGC active power adjustment command can instruct an increase in the adjustment power of the energy storage simulation module. In this case, the frequency regulation module generates an active power adjustment command based on the sum of the energy storage adjustment active power and the active power corresponding to the AGC active power adjustment command. The AGC active power adjustment command can also instruct a decrease in the adjustment power of the energy storage simulation module. In this case, the frequency regulation module generates an active power adjustment command based on the difference between the energy storage adjustment active power and the active power corresponding to the AGC active power adjustment command. When the AGC active power adjustment command instructs an increase in the adjustment power of the energy storage simulation module, the adjustment direction of the AGC active power adjustment command is the increase direction; when the AGC active power adjustment command instructs a decrease in the adjustment power of the energy storage simulation module, the adjustment direction of the AGC active power adjustment command is the decrease direction.

[0084] In actual testing, the first active power regulation command is the power control command for one simulated energy storage unit during the first regulation process. The first simulated energy storage power is the power of one simulated energy storage unit after the first regulation. The third active power regulation command is the power control command for one simulated energy storage unit during the second regulation process. The third simulated energy storage power is the power of one simulated energy storage unit after the second regulation. When the regulation direction of the first AGC active power regulation command is the same as that of the second AGC active power regulation command, if the second power difference is the same as the third power difference, it indicates that the coordination controller has the advanced AGC coordination function and meets the advanced AGC coordination requirements; if the second power difference is not the same as the third power difference, it indicates that the coordination controller does not have the advanced AGC coordination function and does not meet the advanced AGC coordination requirements. The number of first active power regulation commands, the number of first simulated energy storage powers, the number of third active power regulation commands, and the number of third simulated energy storage powers are all the same as the number of simulated energy storage units in the energy storage simulation module.

[0085] Additionally, step S200 may include: adjusting the first AGC active power adjustment command to obtain a second AGC active power adjustment command with the opposite adjustment direction to the first AGC active power adjustment command.

[0086] Correspondingly, step S400 may include: determining whether the fourth power difference between the total power of the third energy storage simulated power and the total power of the first energy storage simulated power is zero; when the fourth power difference is zero, determining that the coordination controller meets the AGC advanced coordination requirements; when the fourth power difference is not zero, determining that the coordination controller does not meet the AGC advanced coordination requirements.

[0087] In actual testing, when the adjustment direction of the first AGC active power adjustment command is different from that of the second AGC active power adjustment command, if the fourth power difference is zero, it means that the coordinating controller has the advanced AGC coordination function and meets the advanced AGC coordination requirements; if the fourth power difference is not zero, it means that the coordinating controller does not have the advanced AGC coordination function and does not meet the advanced AGC coordination requirements.

[0088] In one example, the rated grid frequency is set. f N The frequency is 50Hz, and the rated active power P of the energy storage station is... e For 10MW, the primary frequency regulation droop coefficient % The lower limit of the frequency adjustment dead zone is 2%. f LThe grid frequency is 49.95Hz, the preset static loss compensation is 0.15MW, the preset charging compensation coefficient k1 is 1, the preset discharging compensation coefficient k2 is 1, the AGC active power regulation command is 0MW, and the number of simulated energy storage units is set to 3. The rated power of the PCS in the first simulated energy storage unit is 3MW, and the SOC is 40%. The rated power of the PCS in the second simulated energy storage unit is 3MW, and the SOC is 30%. The rated power of the PCS in the third simulated energy storage unit is 4MW, and the SOC is 30%. The grid frequency is 49.65Hz, and the preset active power distribution mode is average distribution mode. During the first adjustment, the total power of the first simulated power is 3.15MW. During the second adjustment, the AGC active power regulation command is adjusted to 2MW. If the total power of the first simulated power is 5.15MW, then the coordinating controller has the advanced AGC coordination function. Adjusting the AGC active power regulation command to -2MW, if the total power of the first simulated power is 3.15MW, then the coordinating controller has the advanced AGC coordination function.

[0089] In some embodiments, step S200 may include: generating a first active power regulation command based on any one of a preset limiting coefficient, a preset static loss compensation, a preset charging compensation coefficient, a preset discharging compensation coefficient, a preset slip lockout threshold, a preset large frequency difference lower limit threshold, and a preset large frequency difference upper limit threshold, as well as the active power of energy storage regulation.

[0090] It should be noted that in actual frequency regulation, due to the influence of amplitude limiting in different regions, the coordination controller also needs to have amplitude limiting function. In actual testing, an amplitude limiting coefficient can be preset, and combined with the active power regulation of energy storage, a first active power regulation command can be generated to simulate a frequency regulation process. When the total power of the first simulated energy storage power is less than the simulated energy storage power, it indicates that the coordination controller has amplitude limiting function.

[0091] In actual frequency regulation processes, static losses and charge / discharge losses also exist. Therefore, the coordination controller also needs to have static loss compensation and charge / discharge compensation functions. During actual testing, for the static loss function, static loss compensation can be preset. Combined with the active power regulation of energy storage, the first active power regulation command for each energy storage simulation unit is generated to simulate a frequency regulation process. When the total power of the first simulated energy storage equals the sum of the simulated energy storage power and the preset static loss compensation, it indicates that the coordination controller has the static loss function. For the charge / discharge compensation function, a charging compensation coefficient or a pre-set discharging compensation coefficient can be preset. Combined with the active power regulation of energy storage, the first active power regulation command for each energy storage simulation unit is generated to simulate a frequency regulation process. When the total power of the first simulated energy storage equals the product of the simulated energy storage power and the preset discharging compensation coefficient, it indicates that the coordination controller has the charge / discharge compensation function.

[0092] In actual frequency regulation, when the grid frequency changes too rapidly, the coordination controller needs to have a slip-lock function. In this case, the coordination controller typically controls the energy storage station based on static loss compensation. During actual testing, a preset slip-lock threshold is set, and the grid frequency input to the frequency regulation module is adjusted to drop at a rate greater than the preset slip-lock threshold to simulate a frequency regulation process. When the total power of the first simulated energy storage is equal to the static loss compensation, it indicates that the coordination controller has the slip-lock function.

[0093] In actual frequency regulation processes, when the grid frequency changes too rapidly, the coordinating controller needs to have a large frequency difference regulation function. In this case, the coordinating controller typically determines the simulated energy storage power based on the rated active power of the energy storage station and controls the station accordingly. During actual testing, a preset lower limit threshold for large frequency difference is set, and the grid frequency input to the frequency regulation module is adjusted to be lower than this threshold to simulate a frequency regulation process. When the total power of the first simulated energy storage equals the sum of the static loss compensation and the rated power of the energy storage station, it indicates that the coordinating controller has a large frequency difference regulation function. Alternatively, a preset upper limit threshold for large frequency difference is set, and the grid frequency input to the frequency regulation module is adjusted to be higher than this threshold to simulate a frequency regulation process. When the total power of the first simulated energy storage equals the sum of the static loss compensation and the rated power of the energy storage station, it indicates that the coordinating controller has a large frequency difference regulation function.

[0094] In one example, the rated grid frequency is set. f N The frequency is 50Hz, and the rated active power P of the entire station is... e For 10MW, the primary frequency regulation droop coefficient % The lower limit of the frequency adjustment dead zone is 2%. f L The frequency is 49.95Hz, the preset charging compensation coefficient k1 is 1, and the preset discharging compensation coefficient k2 is 1. The number of simulated energy storage units is set to 3. The rated power of the PCS in the first simulated energy storage unit is 3MW and the SOC is 40%. The rated power of the PCS in the second simulated energy storage unit is 3MW and the SOC is 30%. The rated power of the PCS in the third simulated energy storage unit is 4MW and the SOC is 30%.

[0095] When conducting the limiting function test, the preset limiting coefficient is set to 20%, and the grid frequency received by the frequency regulation module is 49.65Hz. The active power of energy storage regulation can be calculated to be 3MW. If the total power of the first energy storage simulated power is 2.15MW, it can be seen that the total power of the first energy storage simulated power is less than the energy storage simulated power, indicating that the coordinating controller has the limiting function.

[0096] When testing the static loss compensation function, the preset static loss compensation is set to 0.15MW. The grid frequency received by the frequency regulation module is 49.65Hz. The active power of energy storage regulation can be calculated to be 3MW. If the total power of the first simulated energy storage is 3.15MW, then the coordinating controller has the static loss compensation function.

[0097] When conducting the charge and discharge compensation function test, the preset static loss compensation is set to 0.15MW, the preset charging compensation coefficient is adjusted to 1.1, the grid frequency received by the frequency modulation module is 49.65Hz, and the active power of energy storage regulation can be calculated to be 3MW. If the total power of the first energy storage simulated power is 3.465MW, then the coordinating controller has the charge and discharge compensation function.

[0098] When conducting the slip lockout function test, the preset charging compensation coefficient is set to 1, the preset slip lockout threshold is set to 1Hz / s, and the grid frequency received by the frequency modulation module is adjusted to drop from 50Hz to 49.65Hz at a rate of 2Hz / s. If the total power of the first energy storage simulated power is 0.15MW, then the coordinating controller has the slip lockout function.

[0099] When conducting large frequency difference frequency regulation tests, the preset lower limit threshold for large frequency difference is set to 49.80Hz, the preset static loss compensation is 0.15MW, the preset slip blockage threshold is 5Hz / s, and the grid frequency received by the frequency regulation module is 49.65Hz. The active power of energy storage regulation can be calculated to be 3MW. If the total power of the first simulated energy storage is 10.15MW, then the coordinating controller has the function of large frequency difference frequency regulation.

[0100] This embodiment also provides a computer-readable storage medium having a computer program stored thereon, the computer program being loaded by a processor to execute the arrangement in any of the methods described above.

[0101] In the embodiments of this application, the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM), etc.

[0102] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0103] The frequency modulation test method, coordination controller, and storage medium provided in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A frequency modulation test method, characterized in that, Applied to a coordination controller, the coordination controller including an energy storage simulation module and a frequency regulation module of an energy storage station, the method includes: The frequency regulation module determines the active power of energy storage regulation based on the received grid frequency, preset frequency adjustment dead zone and adjustment droop coefficient; The frequency modulation module generates a first active power regulation command based on the energy storage regulating active power. The frequency modulation module sends the first active power adjustment command to the energy storage simulation module. The first active power adjustment command is used to instruct the energy storage simulation module to simulate the operation of the energy storage station according to the first active power adjustment command and preset operating parameters, obtain the first energy storage simulation power, and feed back the first energy storage simulation power to the frequency modulation module. The frequency modulation module determines whether the simulated power of the first energy storage meets the frequency modulation requirements.

2. The method according to claim 1, characterized in that, The frequency modulation requirements include command response speed requirements, and the coordination controller also includes a command detection module; After generating the first active power regulation command based on the energy storage regulating active power, the method further includes: Send the first active power adjustment command to the command detection module; Determine whether the time interval between the acquisition time of the power grid frequency and the output time of the first active power adjustment command is less than a preset time interval, wherein the output time is the time when the command detection module outputs the first active power adjustment command; When the duration between the acquisition time and the output time is less than the preset duration, it is determined that the command response speed of the coordination controller meets the command response speed requirement.

3. The method according to claim 1, characterized in that, The frequency modulation requirement includes secondary adjustment requirements; Before determining whether the simulated power of the first energy storage meets the frequency regulation requirements, the method further includes: When the first power difference between the energy storage regulated active power and the total power of the first energy storage simulated power is greater than a preset threshold, a second active power regulation command is generated based on the first power difference. The second active power adjustment command is sent to the energy storage simulation module. The second active power adjustment command is used to instruct the energy storage simulation module to simulate the operation of the energy storage station according to the second active power adjustment command and the preset operating parameters, obtain the second energy storage simulation power, and feed back the second energy storage simulation power to the frequency regulation module. The step of determining whether the simulated power of the first energy storage meets the frequency regulation requirements includes: Determine whether the total power of the second simulated energy storage power is the same as the active power of the energy storage regulation; When the total power of the second energy storage simulated power is the same as the active power of the energy storage regulation, it is determined that the coordination controller meets the secondary regulation requirements.

4. The method according to claim 1, characterized in that, The frequency regulation requirement includes active power allocation requirement, and the energy storage simulation module includes multiple energy storage simulation units, and the number of the first energy storage simulation power is multiple; The step of generating a first active power regulation command based on the energy storage regulating active power includes: Based on the energy storage regulation active power and the preset active power allocation mode, a plurality of first active power regulation commands are generated, wherein one energy storage simulation unit corresponds to one first active power regulation command. Sending the first active power adjustment command to the energy storage simulation module includes: Send the corresponding first active power adjustment command to each of the energy storage simulation units. The first active power adjustment command is used to instruct the corresponding energy storage simulation unit to simulate the operation of the energy storage station according to the active power adjustment command allocated by the preset active power allocation mode and the preset operating parameters, obtain the first energy storage simulation power, and feed back the first energy storage simulation power to the frequency regulation module. The step of determining whether the simulated power of the first energy storage meets the frequency regulation requirements includes: Determine whether the allocation mode of each of the first energy storage simulated powers meets the active power allocation requirements corresponding to the preset active power allocation mode.

5. The method according to claim 1, characterized in that, The frequency regulation requirement includes the active power regulation command blocking requirement, and the preset operating parameters include the state of charge (SOC) of the energy storage simulation unit in the energy storage simulation module. The step of generating a first active power regulation command based on the energy storage regulating active power includes: Adjust the SOC of the target energy storage simulation unit in the energy storage simulation module to be greater than the preset upper limit of SOC, or adjust the SOC of the target energy storage simulation unit to be less than the preset lower limit of SOC. The first active power regulation command is generated based on the energy storage regulation active power and the SOC of the target energy storage simulation unit. The step of determining whether the simulated power of the first energy storage meets the frequency regulation requirements includes: Determine whether the target energy storage simulation power fed back by the target energy storage simulation unit is zero; When the target energy storage simulated power is zero, it is determined that the coordination controller meets the active power regulation command lockout requirement.

6. The method according to claim 1, characterized in that, The frequency regulation requirements include advanced coordination requirements for Automatic Generation Control (AGC). The step of generating a first active power regulation command based on the energy storage regulating active power includes: The first active power regulation instruction is generated based on the energy storage regulation active power and the first AGC active power regulation instruction of the AGC system; Before determining whether the simulated power of the first energy storage meets the frequency regulation requirements, the method further includes: Adjust the first AGC active power adjustment command to obtain a second AGC active power adjustment command with the same adjustment direction as the first AGC active power adjustment command; Based on the energy storage regulation active power and the second AGC active power regulation command, a third active power regulation command is generated; The third active power regulation command is sent to the energy storage simulation module. The third active power regulation command is used to instruct the energy storage simulation module to simulate the operation of the energy storage station according to the third active power regulation command and the preset operating parameters, obtain the third energy storage simulation power, and feed back the third energy storage simulation power to the frequency regulation module. The step of determining whether the simulated power of the first energy storage meets the frequency regulation requirements includes: Determine whether the second power difference between the total power of the third energy storage simulated power and the total power of the first energy storage simulated power and the third power difference between the second active power regulation command and the first active power regulation command are the same; When the second power difference is the same as the third power difference, it is determined that the coordination controller meets the AGC advanced coordination requirements; When the second power difference is different from the third power difference, it is determined that the coordination controller does not meet the advanced coordination requirements of AGC.

7. The method according to claim 6, characterized in that, The step of adjusting the first AGC active power adjustment command to obtain a second AGC active power adjustment command with the same adjustment direction as the first AGC active power adjustment command includes: Adjust the first AGC active power adjustment command to obtain a second AGC active power adjustment command with the opposite adjustment direction to the first AGC active power adjustment command; The step of determining whether the second power difference between the total power of the third simulated energy storage power and the total power of the first simulated energy storage power, and the third power difference between the second active power regulation command and the first active power regulation command are the same includes: Determine whether the fourth power difference between the total power of the third simulated energy storage power and the total power of the first simulated energy storage power is zero; When the fourth power difference is zero, it is determined that the coordination controller meets the AGC advanced coordination requirements; When the fourth power difference is not zero, it is determined that the coordination controller does not meet the AGC advanced coordination requirements.

8. The method according to claim 1, characterized in that, The step of generating a first active power regulation command based on the energy storage regulating active power includes: The first active power regulation command is generated based on any one of the preset limiting coefficient, preset static loss compensation, preset charging compensation coefficient, preset discharging compensation coefficient, preset slip lockout threshold, preset large frequency difference lower limit threshold, and preset large frequency difference upper limit threshold, as well as the energy storage regulation active power.

9. A coordination controller, characterized in that, The device includes an energy storage simulation module and a frequency regulation module for an energy storage station. The energy storage simulation module is used to simulate the operation of the energy storage station, and the frequency regulation module is used to perform the method as described in any one of claims 1-8.

10. A computer-readable storage medium, characterized in that, It stores a computer program, which is loaded by a processor to perform the steps of the method according to any one of claims 1-8.

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