Energy storage power control method, apparatus, and device, and storage medium

Abstract

The present application relates to the technical field of energy storage, and discloses an energy storage power control method, apparatus, and device, and a storage medium, which are used for carrying out energy storage power control taking into account the power requirements of inertial response, primary frequency control, and automatic generation control, so that conflicts among control functions are avoided. The method comprises: in response to an energy storage power control instruction, determining whether an inertial response requirement or a primary frequency control response requirement exists in an energy storage control system; if no inertial response requirement or primary frequency control response requirement exists, determining whether an automatic generation control function is in an enabled state; if the automatic generation control function is in the enabled state, determining a control power value corresponding to the automatic generation control function to be a target energy storage power value; and, according to the target energy storage power value, performing energy storage power control on the energy storage control system.

Description

Energy storage power control method, device, equipment and storage medium

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on December 5, 2023, with application number 202311665039.0 and invention name “Energy Storage Power Control Method, Device, Equipment and Storage Medium”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of energy storage technology, and in particular to an energy storage power control method, device, equipment and storage medium. Background Art

[0003] With the rapid development of the new energy industry, wind power generation and photovoltaic power generation, as the main sources of new energy stations, have gradually expanded in scale. However, wind power generation and photovoltaic power generation are random, volatile and intermittent, and require a certain scale of energy storage as a regulating resource. Therefore, new energy stations require a certain proportion of new energy storage, and energy storage batteries are currently mostly used for energy storage.

[0004] Traditional energy storage control systems primarily regulate a single control function, primarily coordinating primary and secondary frequency regulation. However, other control functions are not coordinated. For example, a wind farm should have inertia response, primary frequency regulation, automatic generation control (AGC), and power smoothing, and conflicts between these different control functions can still occur.

[0005] Summary of the Invention

[0006] The present application provides a method, apparatus, device and storage medium for energy storage power control, which is used to combine inertia response, primary frequency regulation and automatic power generation control power requirements to perform energy storage power control and avoid conflicts between the various control functions.

[0007] A first aspect of an embodiment of the present application provides an energy storage power control method, which is applied to an energy storage control system, wherein the energy storage control system includes an energy storage unit, and includes: responding to an energy storage power control instruction, determining whether there is an inertia response demand or a primary frequency regulation response demand in the energy storage control system; if not, determining whether an automatic power generation control function is in an enabled state; if the automatic power generation control function is in the enabled state, determining a control power value corresponding to the automatic power generation control function as a target energy storage power value; and performing energy storage power control on the energy storage control system according to the target energy storage power value.

[0008] A second aspect of an embodiment of the present application provides an energy storage power control device, which is applied to an energy storage control system, wherein the energy storage control system includes an energy storage unit, and includes: a first judgment module, which is used to respond to an energy storage power control instruction to determine whether there is an inertia response demand or a primary frequency regulation response demand in the energy storage power control system; a second judgment module, which is used to determine whether the automatic power generation control function is in an enabled state if not; a first determination module, which is used to determine the target value corresponding to the automatic power generation control function as the target energy storage power value if the automatic power generation control function is in the enabled state; and a coordination control module, which is used to coordinate and control the energy storage power control system according to the target energy storage power value.

[0009] A third aspect of an embodiment of the present application provides an energy storage power control device, comprising: a memory and at least one processor, wherein the memory stores instructions; the at least one processor calls the instructions in the memory so that the energy storage power control device executes the energy storage power control method of the first aspect mentioned above.

[0010] A fourth aspect of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores instructions, which, when executed on a computer, enable the computer to execute the above-mentioned energy storage power control method.

[0011] In the technical solution provided in the embodiments of the present application, in response to an energy storage power control instruction, a determination is made as to whether an inertia response requirement or a primary frequency regulation response requirement exists in the energy storage control system; if not, a determination is made as to whether the automatic power generation control function is enabled; if the automatic power generation control function is enabled, the control power value corresponding to the automatic power generation control function is determined as the target energy storage power value; and energy storage power control is performed on the energy storage control system according to the target energy storage power value. In the embodiments of the present application, energy storage power control is performed in conjunction with the power requirements of inertia response, primary frequency regulation, and automatic power generation control to avoid conflicts between the various control functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] FIG1 is a schematic diagram of an embodiment of a method for controlling energy storage power according to an embodiment of the present application;

[0013] FIG2 is a schematic diagram of another embodiment of the energy storage power control method according to the embodiment of the present application;

[0014] FIG3 is a schematic diagram of another embodiment of the energy storage power control method according to the embodiment of the present application;

[0015] FIG4 is a schematic diagram of another embodiment of the energy storage power control method according to an embodiment of the present application;

[0016] FIG5 is a schematic diagram of another embodiment of the energy storage power control method according to the embodiment of the present application;

[0017] FIG6 is a schematic diagram of an energy storage power control device according to an embodiment of the present application;

[0018] FIG7 is a schematic diagram of an energy storage power control device in an embodiment of the present application. DETAILED DESCRIPTION

[0019] The present application provides a method, apparatus, device and storage medium for energy storage power control, which is used to combine inertia response, primary frequency regulation and automatic power generation control power requirements to perform energy storage power control and avoid conflicts between the various control functions.

[0020] The terms "first," "second," "third," "fourth," etc. (if any) in the specification and claims of the present application and in the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential sequence. It should be understood that the numbers used in this way are interchangeable where appropriate, so that the embodiments of the present application described herein can, for example, be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having," and any variations thereof, are intended to cover non-exclusive inclusions, for example, a process, method, system, product, or apparatus comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products, or apparatus.

[0021] Please refer to FIG1 , which is a flow chart of a method for controlling energy storage power according to an embodiment of the present application, specifically including:

[0022] 101. In response to an energy storage power control instruction, determine whether there is an inertia response requirement or a primary frequency modulation response requirement in the energy storage control system.

[0023] Upon receiving an energy storage power control command, the system determines whether there is an inertia response requirement or a primary frequency modulation response requirement within the energy storage control system. Energy storage power control commands can be generated internally and periodically, or sent externally. For example, the energy storage control system can be configured to perform energy storage power control during each control cycle, with an internal energy storage power control command generated upon entering a new control cycle. Alternatively, the energy storage power control command can be sent from an external device connected to the energy storage control system.

[0024] It should be noted that the energy storage control system used must include an energy storage unit. In this application and subsequent embodiments, the energy storage unit is used to indicate all energy storage devices in the energy storage control system. For example, the state of charge (SOC) value of the energy storage unit represents the overall SOC value of all energy storage devices in the energy storage control system.

[0025] 102. If not, determine whether the automatic power generation control function is enabled.

[0026] If there is no inertia response demand and no primary frequency regulation response demand in the energy storage control system, it is determined whether the automatic power generation control function is in an enabled state.

[0027] Inertia response demand ΔP I When it is zero, it means there is no inertia response demand; when the primary frequency modulation response demand ΔP pfm When it is zero, it means there is no primary frequency response demand.

[0028] It should be noted that when applied to different types of energy storage control systems, the corresponding inertia response requirements are also different. For example, when the energy storage control system includes wind power generation, the inertia response requirement is the wind power inertia response requirement. When the energy storage control system includes photovoltaic power generation, the inertia response requirement is the photovoltaic inertia response requirement. In the embodiments of this application, the inertia response requirement is used for description, without distinguishing between photovoltaic power generation and wind power generation.

[0029] 103. If the automatic power generation control function is in an enabled state, the control power value corresponding to the automatic power generation control function is determined as the target energy storage power value.

[0030] If the automatic power generation control function is in the enabled state, the control power value corresponding to the AGC function is determined as the target energy storage power value.

[0031] It should be noted that the AGC function belongs to secondary frequency regulation. The AGC function will control the energy storage power through the energy storage control system to meet the most important power requirements in the current energy storage control system.

[0032] 104. Perform energy storage power control on the energy storage control system according to the target energy storage power value.

[0033] The energy storage power of the energy storage control system is controlled according to the target energy storage power value.

[0034] In the embodiment of the present application, energy storage power control is performed in combination with the power requirements of inertia response, primary frequency regulation, and automatic power generation control to avoid conflicts between the various control functions.

[0035] Please refer to FIG2 , which is another flow chart of the energy storage power control method provided in an embodiment of the present application. The specific method includes:

[0036] 201. In response to an energy storage power control instruction, determine whether there is an inertia response requirement or a primary frequency modulation response requirement in the energy storage control system.

[0037] 202. If not, determine whether the automatic power generation control function is enabled.

[0038] 203. If the automatic power generation control function is in an enabled state, the control power value corresponding to the automatic power generation control function is determined as the target energy storage power value.

[0039] Steps 201-203 are similar to steps 101-103 and are not repeated here.

[0040] 204. If the automatic power generation control function is not enabled, determine whether the power generation fluctuation suppression control function is enabled.

[0041] If the automatic power generation control function is not enabled, the system determines whether the power generation fluctuation control function is enabled. The power generation fluctuation control function can be either wind power fluctuation control or photovoltaic power fluctuation control, depending on the type of power generation equipment.

[0042] 205. If the power generation fluctuation smoothing control function is not enabled, determine whether the state of charge (SOC) of the energy storage unit in the energy storage control system is within a preset SOC range.

[0043] If the power generation fluctuation control function is not enabled, the system determines whether the state of charge (SOC) of the energy storage unit in the energy storage control system is within a preset SOC range. The SOC of the energy storage unit refers to the overall SOC value of the energy storage control system. For example, the preset SOC range can be set to [0.2, 0.8], where 0.2 is the minimum SOC threshold and 0.8 is the maximum SOC threshold.

[0044] 206. If the SOC is not within the preset SOC range, the maximum charge and discharge power corresponding to the energy storage unit is determined as the target energy storage power value.

[0045] If the SOC of the energy storage unit is not within the preset SOC range, the maximum charge and discharge power corresponding to the energy storage unit is used as the target energy storage power value.

[0046] Assume that the preset SOC range can be set to [0.2, 0.8]. When the SOC of the energy storage unit is less than 0.2, it means that the SOC of the energy storage unit is too low and needs to be restored to maintain a certain discharge capacity; when the SOC of the energy storage unit is greater than 0.8, it means that the SOC of the energy storage unit is too high and needs to be restored to maintain a certain charging capacity.

[0047] It is understandable that the preset SOC range can be set to [0.2, 0.8]. The SOC of the energy storage unit is 0.1, that is, the SOC of the energy storage unit is less than the SOC minimum threshold of 0.2. When SOC recovery is required, the SOC can be restored to 0.5, thereby maintaining a certain discharge capacity. The termination condition of SOC recovery can be set according to actual conditions, and it is not necessarily restored to the minimum SOC threshold of 0.2. The SOC of the energy storage unit is 0.9, that is, the SOC of the energy storage unit is greater than the SOC maximum threshold of 0.8. When SOC recovery is required, the SOC can be restored to 0.6, thereby maintaining a certain charging capacity. The termination condition of SOC recovery can be set according to actual conditions, and it is not necessarily restored to the maximum SOC threshold of 0.8. The intermediate value 0.5 can be taken, and it can be other values, for example, 0.6, which is not limited here.

[0048] When the SOC of the energy storage unit exceeds the set reasonable range, this application will control the charging and discharging of the energy storage unit according to the maximum charging and discharging power without affecting the control target (frequency compliance, grid-connected power fluctuation compliance), so that the SOC returns to the set range and improves the continuous adjustment capability of the energy storage system.

[0049] 207. If it is within the preset SOC range, determine the target energy storage power value to be zero.

[0050] If the SOC of the energy storage unit is within the preset SOC range, the target energy storage power value is determined to be zero.

[0051] It should be noted that, because the inertia response demand is zero, the primary frequency regulation response demand is zero, and the power control power for smoothing power generation fluctuations is also zero, the energy storage control system does not need to perform energy storage power control at this time. Therefore, the target energy storage power value is zero.

[0052] 208. Perform energy storage power control on the energy storage control system according to the target energy storage power value.

[0053] Step 208 is similar to step 104 and will not be described again here.

[0054] In the embodiment of the present application, energy storage power control is performed by combining the power requirements of inertia response, primary frequency regulation, automatic power generation control, and SOC recovery to avoid conflicts among the various control functions.

[0055] Please refer to FIG3 , which is another flow chart of the energy storage power control method provided in an embodiment of the present application. The specific method includes:

[0056] 301. In response to an energy storage power control instruction, determine whether there is an inertia response requirement or a primary frequency modulation response requirement in the energy storage control system.

[0057] 302. If not, determine whether the automatic power generation control function is enabled.

[0058] 303. If the automatic power generation control function is in an enabled state, the control power value corresponding to the automatic power generation control function is determined as the target energy storage power value.

[0059] Steps 301-303 are similar to steps 101-103 and are not repeated here.

[0060] 304. If the automatic power generation control function is not enabled, determine whether the power generation fluctuation suppression control function is enabled.

[0061] Step 304 is similar to step 204 and will not be described again here.

[0062] 305. If the power generation fluctuation control function is enabled, determine the target power response value, energy storage power upper limit, and energy storage power lower limit required by the power generation fluctuation control function.

[0063] If the power generation fluctuation control function is enabled, the target power response value, the energy storage power upper limit, and the energy storage power lower limit required for the power generation fluctuation control function are determined.

[0064] Because there is a fluctuation range for smoothing power generation fluctuation control, in addition to obtaining the optimal target power response value, the upper and lower limit adjustment range of the energy storage power is also obtained.

[0065] When the energy storage control system is smoothing the fluctuations in power generation, since the grid-connected power only needs to be within a reasonable range, when the grid-connected power is already within a reasonable range, this application can reduce the energy storage charging and discharging power while ensuring that the grid-connected power does not exceed the limit, thereby reducing the energy storage life loss and energy loss.

[0066] 306. Determine whether the SOC of the energy storage unit is within a preset SOC range.

[0067] Determine whether the SOC of the energy storage unit in the energy storage control system is within a preset SOC range. The SOC of the energy storage unit refers to the overall SOC value of the energy storage control system. For example, the preset SOC range can be set to [0.2, 0.8], where 0.2 is the minimum SOC threshold and 0.8 is the maximum SOC threshold.

[0068] 307. If the SOC is not within the preset SOC range, the maximum charge and discharge power corresponding to the energy storage unit is adjusted based on the upper and lower limits of the energy storage power to obtain a target energy storage power value.

[0069] For example, the preset SOC range can be set to [0.2, 0.8], where 0.2 is the minimum SOC threshold and 0.8 is the maximum SOC threshold. When the SOC value is greater than 0.8, discharge is required. The maximum discharge power of the energy storage unit is 20MW, but the upper limit of the energy storage power is 15MW. In this case, the output energy storage power target value should be 15MW. When the SOC value is less than 0.2, charging is required. The maximum charging power of the energy storage unit is -20MW, but the lower limit of the energy storage power is -15MW. In this case, the output energy storage power target value should be -15MW.

[0070] 308. If it is within the preset SOC range, adjust the target power response value based on the energy storage power upper limit and the energy storage power lower limit to obtain an adjusted power response value.

[0071] Specifically, when the SOC value of the energy storage unit is within a preset SOC range, the lower limit sign of the upper limit of the energy storage power and the lower limit sign of the lower limit of the energy storage power are determined; if both the upper limit sign and the lower limit sign are positive, the target power response value is adjusted to the lower limit of the energy storage power to obtain an adjusted power response value; if both the upper limit sign and the lower limit sign are negative, the target power response value is adjusted to the upper limit of the energy storage power to obtain an adjusted power response value; if the upper limit sign is positive and the lower limit sign is negative, the target power response value is adjusted to zero to obtain an adjusted power response value.

[0072] It should be noted that, because the inertia response demand is zero and the primary frequency regulation response demand is zero at this time, the power control power for smoothing power generation fluctuations is not zero. Therefore, the energy storage control system needs to consider the power control power for smoothing power generation fluctuations to control the energy storage power.

[0073] 309. Determine the adjusted power response value as the target energy storage power value.

[0074] 310. Perform energy storage power control on the energy storage control system according to the target energy storage power value.

[0075] Step 310 is similar to step 104 and will not be described again here.

[0076] In the embodiment of the present application, energy storage power control is performed by combining the power requirements of inertia response, primary frequency regulation, automatic power generation control, and power generation power fluctuation smoothing control to avoid conflicts between the various control functions.

[0077] Please refer to FIG4 , which is another flow chart of the energy storage power control method provided in an embodiment of the present application. The specific method includes:

[0078] 401. In response to an energy storage power control instruction, determine whether there is an inertia response requirement or a primary frequency modulation response requirement in the energy storage control system.

[0079] 402. If not, determine whether the automatic power generation control function is enabled.

[0080] 403. If the automatic power generation control function is in an enabled state, the control power value corresponding to the automatic power generation control function is determined as the target energy storage power value.

[0081] Steps 401-403 are similar to steps 101-103 and are not described again here.

[0082] 404. If yes, determine the comprehensive required power value according to the inertia response requirement and / or the primary frequency modulation response requirement.

[0083] It is understandable that either the inertia response requirement or the primary frequency modulation response requirement can exist, or they can exist at the same time. When only the inertia response requirement exists, the inertia response requirement ΔP I Not zero, the primary frequency modulation response demand ΔP pfm is zero; when there is only one frequency modulation response demand, the inertia response demand ΔP I is zero, the primary frequency modulation response demand ΔP pfm Not zero; when the inertia response demand and the primary frequency modulation response demand exist at the same time, the inertia response demand ΔP I Not zero, the primary frequency modulation response demand ΔP pfm Not zero.

[0084] Among them, the comprehensive required power value ΔP1 is the larger absolute value of the inertia response demand and the primary frequency modulation power demand.

[0085] 405. Determine whether the automatic power generation control function is enabled.

[0086] Determine whether the automatic power generation control function is enabled.

[0087] 406. If the automatic power generation control function is not enabled, the comprehensive required power value is determined as the target energy storage power value.

[0088] If the automatic power generation control function is not enabled, the comprehensive required power value ΔP1 is determined as the target energy storage power value. Because ΔP1 is not zero, the target energy storage power value is not zero.

[0089] 407. If the automatic power generation control function is enabled, determine the output power of the energy storage unit when the grid connection point frequency crosses the frequency modulation dead zone once, and obtain a first output power value.

[0090] If the automatic power generation control function is enabled, the output power of the energy storage unit at the moment when the grid connection point frequency crosses the primary frequency modulation dead zone is determined to obtain a first output power value P0.

[0091] 408. Calculate the difference between the control power value corresponding to the automatic power generation control function and the first output power value to obtain a first difference.

[0092] Specifically, determine the control power value P corresponding to the automatic power generation control function AGC (i.e. secondary frequency modulation power), the control power value P AGC Subtract the first output power value P0 (i.e., the primary frequency modulation power) to obtain the first difference ΔP2, ΔP2 = P AGC -P0.

[0093] 409. Determine a target energy storage power value according to the comprehensive required power value and the first difference.

[0094] Specifically, when the comprehensive demand power value ΔP1 is opposite to the first difference value ΔP2 in sign (i.e., the action direction of ΔP1 is opposite to the adjustment direction of ΔP2), the sum of the comprehensive demand power value ΔP1 and the first output power value P0 is determined as the target energy storage power value; when the comprehensive demand power value and the first difference value have the same sign, the comprehensive demand power value ΔP1 and the control power value P corresponding to the automatic power generation control function are determined as the target energy storage power value. AGC The sum is determined as the target energy storage power value.

[0095] 410. Perform energy storage power control on the energy storage control system according to the target energy storage power value.

[0096] Step 410 is similar to step 104 and will not be described again here.

[0097] In the embodiment of the present application, energy storage power control is performed by combining the power requirements of inertia response, primary frequency regulation, automatic power generation control, and secondary frequency regulation to avoid conflicts among the various control functions.

[0098] Please refer to FIG5 , which is another flow chart of the energy storage power control method provided in an embodiment of the present application. The specific method includes:

[0099] 501. In response to an energy storage power control instruction, determine whether there is an inertia response requirement or a primary frequency modulation response requirement in the energy storage control system.

[0100] 502. If not, determine whether the automatic power generation control function is enabled.

[0101] 503. If the automatic power generation control function is in an enabled state, the control power value corresponding to the automatic power generation control function is determined as the target energy storage power value.

[0102] Steps 401-403 are similar to steps 101-103 and are not described again here.

[0103] 504. If the automatic power generation control function is not enabled, determine whether the power generation fluctuation suppression control function is enabled.

[0104] 505. If the power generation fluctuation smoothing control function is not enabled, determine whether the state of charge (SOC) of the energy storage unit in the energy storage control system is within a preset SOC range.

[0105] 506. If the SOC is not within the preset SOC range, the maximum charge and discharge power corresponding to the energy storage unit is determined as the target energy storage power value.

[0106] 507. If it is within the preset SOC range, determine the target energy storage power value to be zero.

[0107] Steps 504-507 are similar to steps 204-207 and are not repeated here.

[0108] 508. If the power generation fluctuation control function is enabled, determine the target power response value, energy storage power upper limit, and energy storage power lower limit required by the power generation fluctuation control function.

[0109] 509. Determine whether the SOC of the energy storage unit is within a preset SOC range.

[0110] 510. If the SOC is not within the preset SOC range, the maximum charge and discharge power corresponding to the energy storage unit is adjusted based on the upper and lower limits of the energy storage power to obtain a target energy storage power value.

[0111] 511. If it is within the preset SOC range, adjust the target power response value based on the energy storage power upper limit and the energy storage power lower limit to obtain an adjusted power response value.

[0112] 512. Determine the adjusted power response value as the target energy storage power value.

[0113] Steps 508-512 are similar to steps 305-309 and are not described again here.

[0114] 513. If present, determine the comprehensive required power value based on the inertia response requirement and / or the primary frequency modulation response requirement.

[0115] 514. Determine whether the automatic power generation control function is enabled.

[0116] Determine whether the automatic power generation control function is enabled.

[0117] 515. If the automatic power generation control function is not enabled, the comprehensive required power value is determined as the target energy storage power value.

[0118] 516. If the automatic power generation control function is enabled, determine the output power of the energy storage unit when the grid connection point frequency crosses the frequency modulation dead zone once, and obtain a first output power value.

[0119] 517. Calculate the difference between the control power value corresponding to the automatic power generation control function and the first output power value to obtain a first difference.

[0120] 518. Determine a target energy storage power value based on the comprehensive required power value and the first difference.

[0121] Steps 513-518 are similar to steps 404-409 and are not described again here.

[0122] 519. Perform energy storage power control on the energy storage control system according to the target energy storage power value.

[0123] Step 519 is similar to step 104 and will not be described again here.

[0124] In the embodiment of the present application, energy storage power control is performed by combining the power requirements of inertia response, primary frequency regulation, automatic power generation control, SOC recovery, power generation fluctuation control, and secondary frequency regulation to avoid conflicts among the various control functions.

[0125] The above describes the energy storage power control method in the embodiment of the present application. The following describes the energy storage power control device in the embodiment of the present application. Please refer to Figure 6. An embodiment of the energy storage power control device in the embodiment of the present application includes:

[0126] A first judgment module 601 is configured to determine whether there is an inertia response requirement or a primary frequency modulation response requirement in the energy storage power control system in response to an energy storage power control instruction;

[0127] The second judgment module 602 is used to judge whether the automatic power generation control function is enabled if it does not exist;

[0128] A first determining module 603 is configured to determine a target value corresponding to the automatic power generation control function as a target energy storage power value if the automatic power generation control function is in the enabled state;

[0129] The coordination control module 604 is configured to coordinate and control the energy storage power control system according to the target energy storage power value.

[0130] In a feasible implementation manner, the energy storage power control device further includes:

[0131] The third judgment module 605 is configured to judge whether the power generation fluctuation smoothing control function is in the enabled state if the automatic power generation control function is not in the enabled state;

[0132] A fourth determination module 606 is configured to determine whether the state of charge (SOC) of the energy storage unit in the energy storage control system is within a preset SOC range if the power generation power fluctuation smoothing control function is not enabled;

[0133] A second determining module 607 is configured to determine the maximum charge and discharge power corresponding to the energy storage unit as a target energy storage power value;

[0134] The third determining module 608 is configured to determine the target energy storage power value to be zero if the SOC is within a preset SOC range.

[0135] In a feasible implementation manner, the energy storage power control device further includes:

[0136] A fourth determining module 609 is configured to determine a target power response value, an upper limit of energy storage power, and a lower limit of energy storage power required for the power generation power fluctuation smoothing control function if the power generation power fluctuation smoothing control function is enabled;

[0137] A fifth determination module 610 is configured to determine whether the SOC of the energy storage unit is within a preset SOC range;

[0138] A first adjustment module 611 is configured to adjust the maximum charge and discharge power corresponding to the energy storage unit based on the energy storage power upper limit and the energy storage power lower limit to obtain a target energy storage power value if the SOC is not within the preset SOC range;

[0139] A second adjustment module 612 is configured to adjust the target power response value based on the power response value upper limit and the power response value lower limit to obtain an adjusted power response value if the SOC is within a preset SOC range;

[0140] The fifth determining module 613 is configured to determine the adjusted power response value as the target energy storage power value.

[0141] In a feasible implementation, the second adjustment module 612 is specifically configured to:

[0142] When the SOC value of the energy storage unit is within a preset SOC range, determining the lower limit sign of the energy storage power upper limit and the lower limit sign of the energy storage power lower limit;

[0143] If the upper limit sign and the lower limit sign are both positive, the target power response value is adjusted to the energy storage power lower limit to obtain an adjusted power response value;

[0144] If the upper limit sign and the lower limit sign are both negative, the target power response value is adjusted to the energy storage power upper limit to obtain an adjusted power response value;

[0145] If the sign of the upper limit is positive and the sign of the lower limit is negative, the target power response value is adjusted to zero to obtain an adjusted power response value.

[0146] In a feasible implementation manner, the energy storage power control device further includes:

[0147] a sixth determining module 614, configured to determine a comprehensive required power value according to the inertia response requirement and / or the primary frequency modulation response requirement, if any;

[0148] The sixth determination module 615 is configured to determine whether the automatic power generation control function is enabled.

[0149] The seventh determining module 616 is configured to determine the comprehensive required power value as the target energy storage power value if the automatic power generation control function is not in the enabled state.

[0150] In a feasible implementation manner, the energy storage power control device further includes:

[0151] an eighth determining module 617, configured to determine the output power of the energy storage unit at the moment when the grid connection point frequency crosses a frequency modulation dead zone if the automatic power generation control function is in the enabled state, to obtain a first output power value;

[0152] a calculation module 618 configured to calculate a difference between a control power value corresponding to the automatic power generation control function and the first output power value to obtain a first difference;

[0153] The ninth determination module 619 is configured to determine a target energy storage power value according to the comprehensive required power value and the first difference.

[0154] In a feasible implementation manner, the ninth determining module 619 is specifically configured to:

[0155] When the signs of the comprehensive required power value and the first difference value are opposite, determining the sum of the comprehensive required power value and the first output power value as the target energy storage power value;

[0156] When the comprehensive required power value and the first difference have the same sign, the sum of the comprehensive required power value and the control power value corresponding to the automatic power generation control function is determined as the target energy storage power value.

[0157] In the embodiment of the present application, energy storage power control is performed by combining the power requirements of inertia response, primary frequency regulation, automatic power generation control, SOC recovery, power generation fluctuation control, and secondary frequency regulation to avoid conflicts among the control functions.

[0158] As shown in FIG7 , the energy storage power control device includes a processor 700 and a memory 701 . The memory 701 stores machine executable instructions that can be executed by the processor 700 . The processor 700 executes the machine executable instructions to implement the above energy storage power control method.

[0159] Furthermore, the energy storage power control device shown in FIG7 further includes a bus 702 and a communication interface 703 , and the processor 700 , the communication interface 703 and the memory 701 are connected via the bus 702 .

[0160] Memory 701 may include high-speed random access memory (RAM) and may also include non-volatile memory (non-volatile memory), such as at least one disk storage device. Communication between the system network element and at least one other network element is achieved through at least one communication interface 703 (which may be wired or wireless), and may utilize the Internet, a wide area network, a local area network, a metropolitan area network, etc. Bus 702 may be an ISA bus, a PCI bus, or an EISA bus. The bus may be classified as an address bus, a data bus, a control bus, etc. For ease of illustration, FIG7 uses only one bidirectional arrow, but this does not imply that there is only one bus or only one type of bus.

[0161] The processor 700 may be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above method may be completed by hardware integrated logic circuits or software instructions in the processor 700. The processor 700 may be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it may also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It may implement or execute the various methods, steps, and logic block diagrams disclosed in the embodiments of the present disclosure. The general-purpose processor may be a microprocessor or any conventional processor. The steps of the method disclosed in conjunction with the embodiments of the present disclosure may be directly implemented and executed by a hardware decoding processor, or by a combination of hardware and software modules in the decoding processor. The software module may be located in a storage medium mature in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, etc. The storage medium is located in the memory 701 , and the processor 700 reads the information in the memory 701 and completes the method steps of the aforementioned embodiment in combination with its hardware.

[0162] The present application also provides a computer-readable storage medium, which may be a non-volatile computer-readable storage medium or a volatile computer-readable storage medium. The computer-readable storage medium stores instructions. When the instructions are executed on a computer, the computer executes the steps of the energy storage power control method. The steps specifically include:

[0163] In response to the energy storage power control instruction, a determination is made as to whether an inertia response requirement or a primary frequency regulation response requirement exists in the energy storage control system; if not, a determination is made as to whether the automatic power generation control function is enabled; if the automatic power generation control function is enabled, a control power value corresponding to the automatic power generation control function is determined as the target energy storage power value; and energy storage power control is performed on the energy storage control system according to the target energy storage power value. In this embodiment of the present application, energy storage power control is performed in conjunction with the power requirements of inertia response, primary frequency regulation, and automatic power generation control to avoid conflicts between the various control functions.

[0164] After determining whether the automatic power generation control is in an enabled state, the above further includes: if the automatic power generation control function is not in an enabled state, determining whether the power generation fluctuation smoothing control function is in an enabled state; if the power generation fluctuation smoothing control function is not in an enabled state, determining whether the state of charge (SOC) of the energy storage unit in the energy storage control system is within a preset SOC range; if it is not within the preset SOC range, restoring the SOC of the energy storage unit according to the maximum charge and discharge power corresponding to the energy storage unit, and determining the target energy storage power value to be zero; if it is within the preset SOC range, releasing the energy storage output power, and determining the target energy storage power value to be zero.

[0165] After determining whether the power generation fluctuation smoothing control function is in an enabled state, the above also includes: if the power generation fluctuation smoothing control function is in an enabled state, determining the target power response value, power response value upper limit and power response value lower limit required for the power generation fluctuation smoothing control function; determining whether the SOC of the energy storage unit is within a preset SOC range; if it is not within the preset SOC range, restoring the SOC of the energy storage unit according to the maximum charge and discharge power corresponding to the energy storage unit, and determining the target power response value as the target energy storage power value; if it is within the preset SOC range, adjusting the target power response value based on the power response value upper limit and the power response value lower limit to obtain the adjusted power response value; and determining the adjusted power response value as the target energy storage power value.

[0166] If the above is in the preset SOC range, the target power response value is adjusted based on the upper limit and the lower limit of the power response value to obtain the adjusted power response value, including: when the SOC value of the energy storage unit is in the preset SOC range, determining the lower limit sign of the upper limit of the power response value and the lower limit sign of the lower limit of the power response value; if the upper limit sign and the lower limit sign are both positive, the target power response value is adjusted to the lower limit of the power response value to obtain the adjusted power response value; if the upper limit sign and the lower limit sign are both negative, the target power response value is adjusted to the upper limit of the power response value to obtain the adjusted power response value; if the upper limit sign is positive and the lower limit sign is negative, the target power response value is adjusted to zero to obtain the adjusted power response value.

[0167] After determining whether an inertia response demand or a primary frequency regulation response demand exists in the energy storage power control system, the above method further includes: if so, determining a comprehensive demand power value based on the inertia response demand and / or the primary frequency regulation response demand; determining whether the automatic power generation control function is enabled; and if the automatic power generation control function is not enabled, determining the comprehensive demand power value as the target energy storage power value.

[0168] After determining whether the automatic power generation control function is in an enabled state, the above further includes: if the automatic power generation control function is in an enabled state, determining the output power of the energy storage unit at the moment when the grid connection point frequency crosses a frequency modulation dead zone once, to obtain a first output power value; calculating the difference between the control power value corresponding to the automatic power generation control function and the first output power value, to obtain a first difference; and determining a target energy storage power value based on the comprehensive demand power value and the first difference.

[0169] The above-mentioned determination of the target energy storage power value based on the comprehensive demand power value and the first difference includes: when the comprehensive demand power value and the first difference have opposite signs, determining the target energy storage power value as the sum of the comprehensive demand power value and the first output power value; when the comprehensive demand power value and the first difference have the same sign, determining the target energy storage power value as the sum of the comprehensive demand power value and the control power value corresponding to the automatic power generation control function.

[0170] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0171] In addition, in the description of the embodiments of this application, unless otherwise specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0172] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0173] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this application and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0174] Finally, it should be noted that the above embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The scope of protection of the present application is not limited thereto. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that any person skilled in the art who is familiar with the technical field can still modify the technical solutions described in the above embodiments within the technical scope disclosed in the present application, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not deviate from the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A method for controlling energy storage power, characterized in that: Applied to an energy storage control system, the energy storage control system comprises an energy storage unit, including: In response to the energy storage power control instruction, determining whether there is an inertia response demand or a primary frequency modulation response demand in the energy storage control system; If not, determine whether the automatic power generation control function is enabled; If the automatic power generation control function is in the enabled state, determining the control power value corresponding to the automatic power generation control function as the target energy storage power value; The energy storage power of the energy storage control system is controlled according to the target energy storage power value.

2. The energy storage power control method according to claim 1, characterized in that: After determining whether the automatic power generation control is in an enabled state, the method further includes: If the automatic power generation control function is not in the enabled state, determining whether the power generation fluctuation smoothing control function is in the enabled state; If the power generation power fluctuation smoothing control function is not in an enabled state, determining whether the state of charge SOC of the energy storage unit in the energy storage control system is within a preset SOC range; If it is not within the preset SOC range, the maximum charge and discharge power corresponding to the energy storage unit is determined as the target energy storage power value; If it is within the preset SOC range, the target energy storage power value is determined to be zero.

3. The energy storage power control method according to claim 2, characterized in that: After determining whether the power generation power fluctuation control function is enabled, the method further includes: If the power generation power fluctuation control function is in an enabled state, determining a target power response value, an upper limit of energy storage power, and a lower limit of energy storage power required by the power generation power fluctuation control function; Determine whether the SOC of the energy storage unit is within a preset SOC range; If it is not within the preset SOC range, the maximum charge and discharge power corresponding to the energy storage unit is adjusted based on the energy storage power upper limit and the energy storage power lower limit to obtain a target energy storage power value; If it is within the preset SOC range, the energy storage power upper limit and the energy storage power lower limit are adjusted. adjusting the target power response value to obtain an adjusted power response value; The adjusted power response value is determined as the target energy storage power value.

4. The energy storage power control method according to claim 3, characterized in that: If the SOC is within the preset SOC range, adjusting the target power response value based on the energy storage power upper limit and the energy storage power lower limit to obtain an adjusted power response value includes: When the SOC value of the energy storage unit is within a preset SOC range, determining the lower limit sign of the energy storage power upper limit and the lower limit sign of the energy storage power lower limit; If the upper limit sign and the lower limit sign are both positive, the target power response value is adjusted to the energy storage power lower limit to obtain an adjusted power response value; If the upper limit sign and the lower limit sign are both negative, the target power response value is adjusted to the energy storage power upper limit to obtain an adjusted power response value; If the sign of the upper limit is positive and the sign of the lower limit is negative, the target power response value is adjusted to zero to obtain an adjusted power response value.

5. The energy storage power control method according to claim 1, characterized in that: After determining whether there is an inertia response requirement or a primary frequency modulation response requirement in the energy storage power control system, the method further includes: If so, determining a comprehensive required power value according to the inertia response requirement and / or the primary frequency modulation response requirement; Determine whether the automatic power generation control function is in an enabled state; If the automatic power generation control function is not in the enabled state, the comprehensive required power value is determined as the target energy storage power value.

6. The energy storage power control method according to claim 5, characterized in that: After determining whether the automatic power generation control function is in an enabled state, the method further includes: If the automatic power generation control function is in the enabled state, determining the output power of the energy storage unit when the grid connection point frequency crosses the primary frequency modulation dead zone, and obtaining a first output power value; Calculate the control power value corresponding to the automatic power generation control function and the first output power value The difference between them is used to obtain the first difference; A target energy storage power value is determined according to the comprehensive required power value and the first difference.

7. The energy storage power control method according to claim 6, characterized in that: The determining a target energy storage power value according to the comprehensive required power value and the first difference includes: When the signs of the comprehensive required power value and the first difference value are opposite, the sum of the comprehensive required power value and the first output power value is determined as the target energy storage power value; When the comprehensive required power value and the first difference value have the same sign, the sum of the comprehensive required power value and the control power value corresponding to the automatic power generation control function is determined as the target energy storage power value.

8. A storage power control device, characterized in that: Applied to an energy storage control system, the energy storage control system comprises an energy storage unit, including: A first judgment module is used to judge whether there is an inertia response requirement or a primary frequency modulation response requirement in the energy storage power control system in response to the energy storage power control instruction; A second judgment module is used to judge whether the automatic power generation control function is in an enabled state if it does not exist; a first determining module, configured to determine a target value corresponding to the automatic power generation control function as a target energy storage power value if the automatic power generation control function is in the enabled state; A coordination control module is used to coordinate and control the energy storage power control system according to the target energy storage power value.

9. An energy storage power control device, characterized in that: The energy storage power control device comprises: a memory and at least one processor, the memory stores instructions, and the memory and the at least one processor are interconnected via a line; The at least one processor calls the instruction in the memory so that the energy storage power control device executes the energy storage power control method as described in any one of claims 1-7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores instructions, and when the instructions are executed by the processor, the energy storage power control method as described in any one of claims 1-7 is implemented.

Images