Energy storage control method and device, computer equipment and computer readable storage medium

Abstract

The invention relates to an energy storage control method and device, computer equipment and a computer readable storage medium, the method is applied to an EMS, under the condition that first energy storage equipment is in a charging state, the smaller value of a demand threshold value and rated charging power of the first energy storage equipment is determined as first charging power, and the first charging power is used for charging the first energy storage equipment. The first energy storage equipment is any energy storage equipment managed by the EMS; determining the product of the first charging power and a proportionality coefficient as second charging power, wherein the proportionality coefficient is smaller than 1; and sending the second charging power to the first energy storage device, so that the charging power of the first energy storage device does not exceed the second charging power. The method can ensure that the charging power of the energy storage equipment does not exceed the demand limit, thereby ensuring the earnings.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to an energy storage control method, device, computer equipment, and computer-readable storage medium. Background Art

[0002] As the country's overall strategy of building a new power system continues to advance, the penetration rate of new energy sources is gradually increasing, and the demand for energy storage in the entire power system is constantly increasing. Since the electricity charges for peak and valley electricity are different, peak-valley arbitrage is used to increase profits.

[0003] During the energy storage process of the energy storage device, if the charging power of the energy storage device is large, additional expenses will be incurred, thereby reducing the benefits. Summary of the invention

[0004] Based on this, it is necessary to provide an energy storage control method, device, computer equipment and computer-readable storage medium that guarantee benefits through demand limitation in order to address the above technical problems.

[0005] In a first aspect, the present application provides an energy storage control method, which is applied to an electric energy management system EMS, comprising:

[0006] When the first energy storage device is in a charging state, a smaller value between a demand threshold and a rated charging power of the first energy storage device is determined as a first charging power, and the first energy storage device is any energy storage device managed by the EMS;

[0007] Determine the product of the first charging power and a proportional coefficient as a second charging power, wherein the proportional coefficient is less than 1;

[0008] The second charging power is sent to the first energy storage device so that the charging power of the first energy storage device does not exceed the second charging power.

[0009] In one embodiment, the method further comprises:

[0010] When the first energy storage device is in a discharging state, obtaining a real-time discharge power of the gateway;

[0011] Determine the smaller value between the real-time discharge power of the gateway and the rated discharge power of the first energy storage device as a discharge power threshold;

[0012] The discharge power threshold is sent to the first energy storage device so that the discharge power of the first energy storage device does not exceed the discharge power threshold.

[0013] In one embodiment, determining the second charging power by multiplying the first charging power by a proportional coefficient comprises:

[0014] When the current time belongs to a dangerous period, the product of the first charging power and the first proportional coefficient is determined as the second charging power;

[0015] When the current time belongs to the safe period, the product of the first charging power and the second proportional coefficient is determined as the second charging power, the first proportional coefficient and the second proportional coefficient are less than 1, and the second proportional coefficient is greater than the first proportional coefficient;

[0016] The second charging power and the discharging power threshold are determined at a first frequency during the dangerous period, and at a second frequency during the safe period, wherein the first frequency is greater than the second frequency.

[0017] In one embodiment, the method further comprises:

[0018] Determining a real-time demand value of the first energy storage device;

[0019] When the real-time demand value of the first energy storage device is greater than the demand threshold of the first energy storage device, the demand threshold of the first energy storage device is updated to the real-time demand value of the first energy storage device.

[0020] In one embodiment, the method further comprises:

[0021] A demand threshold of the first energy storage device is received from a server, where the demand threshold of the first energy storage device is determined according to a historical demand value of the first energy storage device.

[0022] In one embodiment, the method further comprises:

[0023] The dangerous period and the safe period are received from a server, where the dangerous period and the safe period are determined according to a historical demand value of the first energy storage device.

[0024] In one embodiment, the method further comprises:

[0025] The real-time demand value of the first energy storage device is sent to the server, and the real-time demand value of the first energy storage device is used by the server to determine or update the dangerous time period and the safe time period.

[0026] In one embodiment, the method further comprises:

[0027] The dangerous period and the safe period are sent to the first energy storage device, so that the first energy storage device adjusts the charging power and the discharging power with a first step length during the dangerous period and adjusts the charging power and the discharging power with a second step length during the safe period, and the first step length is smaller than the second step length.

[0028] In a second aspect, the present application provides an energy storage control method, which is applied to a server, comprising:

[0029] Acquire a historical demand value of a first energy storage device in a first time period, where the first energy storage device is any energy storage device managed by an electric energy management system EMS managed by the server;

[0030] Determining a maximum demand value among the historical demand values ​​in the first time period as a demand threshold of the first energy storage device;

[0031] The demand threshold is sent to the EMS, where the demand threshold is used by the EMS to determine a second charging power so that the charging power of the first energy storage device does not exceed the second charging power.

[0032] In one embodiment, the method further comprises:

[0033] Obtaining a historical demand value of the first energy storage device in a second time period;

[0034] Determining a dangerous period and a safe period of the first energy storage device according to the historical demand value of the second time period;

[0035] The dangerous period and the safe period are sent to the EMS, wherein the dangerous period is used by the EMS to determine the second charging power using a first proportional coefficient, and the safe period is used by the EMS to determine the second charging power using a second proportional coefficient, wherein the second proportional coefficient is greater than the first proportional coefficient.

[0036] In one embodiment, determining the dangerous period and the safe period of the first energy storage device according to the historical demand value of the second time period includes:

[0037] Determine an average value of the historical demand values ​​in the second time period to obtain a first average value;

[0038] Determine the number of historical demand values ​​greater than the first average value in the historical demand values ​​of the second time period to obtain a first number;

[0039] determining a ratio of the first number to a total number of historical demand values ​​for the second time period to obtain a first ratio;

[0040] When the ratio of the number of historical demand values ​​greater than the first average value in the first time period to the total number of historical demand values ​​in the first time period is greater than the first ratio, determining the first time period as a dangerous time period for the first energy storage device;

[0041] A safe period for the first energy storage device is determined according to the dangerous period.

[0042] In one embodiment, the method further comprises:

[0043] Acquire a historical demand value of the first energy storage device in a third time period, where the third time period is a time period after the second time period and has the same length as the second time period;

[0044] updating the dangerous period and the safe period according to the historical demand value of the third time period;

[0045] The updated dangerous period and the safe period are sent to the EMS.

[0046] In one embodiment, updating the dangerous period and the safe period according to the historical demand value of the third time period includes:

[0047] Determine an average value of the historical demand values ​​in the third time period to obtain a second average value;

[0048] Determine the number of demand values ​​greater than the second average value in the historical demand values ​​of the third time period to obtain a second number;

[0049] determining a ratio of the second number to a total number of historical demand values ​​for the third time period to obtain a second ratio;

[0050] When the ratio of the number of historical demand values ​​greater than the second average value in the second period to the total number of historical demand values ​​in the second period is greater than the second ratio, updating the dangerous period to the union of the dangerous period and the second period;

[0051] The safe period is updated according to the updated dangerous period.

[0052] In one embodiment, the method further comprises:

[0053] receiving a real-time demand value of the first energy storage device from the EMS;

[0054] The real-time demand value of the first energy storage device is stored.

[0055] In a third aspect, the present application further provides an energy storage control device, which is applied to an electric energy management system EMS, and the device comprises:

[0056] a determining unit, configured to determine, when the first energy storage device is in a charging state, a smaller value between a demand threshold and a rated charging power of the first energy storage device as a first charging power, wherein the first energy storage device is any energy storage device managed by the EMS;

[0057] The determining unit is further configured to determine a second charging power by multiplying the first charging power by a proportional coefficient, wherein the proportional coefficient is less than 1;

[0058] A communication unit is used to send the second charging power to the first energy storage device so that the charging power of the first energy storage device does not exceed the second charging power.

[0059] In a fourth aspect, the present application further provides an energy storage control device, which is applied to a server, and the device comprises:

[0060] An acquiring unit, configured to acquire a historical demand value of a first energy storage device in a first time period, wherein the first energy storage device is any energy storage device managed by an electric energy management system EMS managed by the server;

[0061] a determining unit, configured to determine a maximum demand value among the historical demand values ​​in the first time period as a demand threshold value of the first energy storage device;

[0062] A communication unit is used to send the demand threshold to the EMS, where the demand threshold is used by the EMS to determine a second charging power so that the charging power of the first energy storage device does not exceed the second charging power.

[0063] In a fifth aspect, the present application further provides a computer device, which is an EMS, comprising a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the following steps are implemented:

[0064] When the first energy storage device is in a charging state, a smaller value between a demand threshold and a rated charging power of the first energy storage device is determined as a first charging power, and the first energy storage device is any energy storage device managed by the EMS;

[0065] Determine the product of the first charging power and a proportional coefficient as a second charging power, wherein the proportional coefficient is less than 1;

[0066] The second charging power is sent to the first energy storage device so that the charging power of the first energy storage device does not exceed the second charging power.

[0067] In a sixth aspect, the present application further provides a computer device, which is a server, comprising a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the following steps are implemented:

[0068] Acquire a historical demand value of a first energy storage device in a first time period, where the first energy storage device is any energy storage device managed by an electric energy management system EMS managed by the server;

[0069] Determining a maximum demand value among the historical demand values ​​in the first time period as a demand threshold of the first energy storage device;

[0070] The demand threshold is sent to the EMS, where the demand threshold is used by the EMS to determine a second charging power so that the charging power of the first energy storage device does not exceed the second charging power.

[0071] In a seventh aspect, the present application further provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program implements the steps of the above method when executed by a processor.

[0072] In an eighth aspect, the present application also provides a computer program product, including a computer program, which implements the steps of the above method when executed by a processor.

[0073] In the embodiment of the present application, when the first energy storage device is in a charging state, the EMS determines the smaller value of the demand threshold value and the rated charging power of the first energy storage device as the first charging power, determines the product of the first charging power and the proportionality coefficient less than 1 as the second charging power, and sends the second charging power to the first energy storage device so that the charging power of the first energy storage device does not exceed the second charging power. It can be seen that the EMS can ensure that the charging power of the energy storage device does not exceed the demand threshold value of the energy storage device according to the proportionality coefficient and the demand threshold value and the rated charging power of the energy storage device, and can ensure that the charging power of the energy storage device does not exceed the demand limit, thereby ensuring the benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0074] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the drawings required for use in the embodiments of the present application or related technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0075] Figure 1 It is a structural diagram of a network architecture provided by an embodiment of the present application;

[0076] Figure 2 It is a flow chart of an energy storage control method provided in an embodiment of the present application;

[0077] Figure 3 is a flow chart of another energy storage control method provided in an embodiment of the present application;

[0078] Figure 4 It is a flow chart of another energy storage control method provided in an embodiment of the present application;

[0079] Figure 5 It is a flow chart of another energy storage control method provided in an embodiment of the present application;

[0080] Figure 6 It is a flow chart of another energy storage control method provided in an embodiment of the present application;

[0081] Figure 7 is a structural schematic diagram of an energy storage control device provided in an embodiment of the present application;

[0082] Figure 8 is a structural schematic diagram of another energy storage control device provided in an embodiment of the present application;

[0083] Fig. 9 It is a structural diagram of a computer device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0084] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0085] In order to better understand the embodiments of the present application, the network architecture of the present application is first introduced below.

[0086] Figure 1 Schematic diagram of a network architecture provided by an embodiment of the present application. Figure 1 As shown, the network architecture may include a server 101 , multiple energy management systems (EMS) 102 , multiple gateways 103 and multiple energy storage devices 104 .

[0087] The server 101 and the EMS 102 are connected via a network, which may be a local area network or a wide area network.

[0088] The EMS 102 and the gateway 103 may be connected via a wired connection. For example, the EMS 102 and the gateway 103 may be connected via a 465 wire.

[0089] The EMS 102 and the energy storage device 104 may be connected via a network or an optical fiber. The network may be a local area network or a wide area network.

[0090] The gateway 103 and the energy storage device 104 may be connected via wires.

[0091] An electric meter is provided on the gateway 103. The electric meter can be a demand meter or a common meter. The demand meter can record the demand values ​​of different energy storage devices. The common meter can record the instantaneous charging power of different energy storage devices at the gateway 103.

[0092] Multiple EMSs 102 correspond to multiple gateways 103 one by one, that is, each EMS 102 corresponds to a unique gateway 103. Each EMS 102 can manage multiple energy storage devices 104. Each gateway 103 can charge multiple energy storage devices 104. The energy storage devices 104 corresponding to the corresponding EMSs 102 and gateways 103 are the same.

[0093] The gateway 103 may charge the energy storage device 104 and record the charge power or demand value of the energy storage device 104 .

[0094] EMS 102 may obtain the demand value or charging power of the managed energy storage device 104 from the gateway 103. In the case where the charging power of the energy storage device 104 is obtained, EMS 102 may also determine the demand value of the energy storage device 104 according to the charging power of the energy storage device 104. EMS 102 may then report the demand value of the energy storage device 104 to the server 101.

[0095] After receiving the demand value of the energy storage device 104 reported by the EMS 102, the server 101 may store the demand value of the energy storage device 104. The server 101 may also determine the demand threshold of the energy storage device 104 based on the stored demand value of the energy storage device 104, and then send the demand threshold of the energy storage device 104 to the EMS 102. Accordingly, the EMS 102 may also receive the demand threshold of the energy storage device 104, and may determine the charging power threshold of the energy storage device 104 based on the demand threshold of the energy storage device 104, and then send the charging power threshold to the energy storage device 104, so that the charging power of the energy storage device 104 does not exceed the charging power threshold.

[0096] The server 101 may also divide each day into a dangerous period and a safe period according to the stored demand value of the energy storage device 104. The server 101 may also periodically update the dangerous period and the safe period according to the stored demand value of the energy storage device 104. The server 101 may also send the dangerous period and the safe period to the EMS 102. The EMS 102 may also receive the dangerous period and the safe period, and determine the charging power threshold of the energy storage device 104 using different proportional coefficients when the energy storage device 104 is in different periods.

[0097] The gateway may be a device such as a transformer that can provide electrical energy to the energy storage device.

[0098] The server can be an independent physical server, or a server cluster or distributed system composed of multiple physical servers, or a cloud server that provides basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communications, middleware services, domain name services, security services, and big data and artificial intelligence platforms. The server can be directly or indirectly connected via wired or wireless communication, which is not limited in the embodiments of the present application.

[0099] Energy storage devices are devices that can store electrical energy and provide electrical energy to electrical devices.

[0100] It should be understood that Figure 1 This is an exemplary description of the network architecture of the present application and does not limit the network architecture of the present application.

[0101] Based on the above network architecture, Figure 2 is a flow chart of an energy storage control method provided in an embodiment of the present application. The energy storage control method is applied to EMS. Figure 2 As shown, the energy storage control method may include the following steps.

[0102] 201. When a first energy storage device is in a charging state, determine a smaller value between a demand threshold value and a rated charging power of the first energy storage device as a first charging power.

[0103] The first energy storage device is any energy storage device managed by the EMS.

[0104] The EMS can monitor the working state of the first energy storage device in real time. The working state of the first energy storage device can be a charging state or a discharging state. When the working state of the first energy storage device is a charging state, the gateway is charging the first energy storage device. When the working state of the first energy storage device is a discharging state, the first energy storage device is charging the electrical device.

[0105] When monitoring that the first energy storage device is in a charging state, the EMS can determine the smaller value of the demand threshold value and the rated charging power of the first energy storage device as the first charging power, that is, the demand threshold value and the rated charging power of the first energy storage device can be compared, and the smaller value of the demand threshold value and the rated charging power of the first energy storage device can be determined as the first charging power according to the comparison result.

[0106] The rated charging power of the first energy storage device is a specified maximum charging power of the first energy storage device, which is determined when the first energy storage device leaves the factory.

[0107] The demand threshold of the first energy storage device is the maximum demand value of the first energy storage device. The demand value of the first energy storage device is the average value of the charging power of the first energy storage device in the demand cycle. The demand cycle can be set as needed. The demand threshold of the first energy storage device can be determined by the EMS or by the server.

[0108] 202. Determine the product of the first charging power and the proportional coefficient as the second charging power.

[0109] The first power threshold is less than or equal to the demand threshold of the first energy storage device. In order to ensure that the charging power of the first energy storage device can be less than the demand threshold of the first energy storage device, the EMS can determine the product of the first charging power and the proportionality coefficient as the second charging power. The proportionality coefficient is less than 1.

[0110] 203. Send a second charging power to the first energy storage device.

[0111] Accordingly, the first energy storage device receives the second charging power from the EMS.

[0112] After the EMS determines the second charging power, it can send the second charging power to the first energy storage device. After the first energy storage device receives the second charging power, it can make the charging power not exceed the second charging power, that is, ensure that the charging power is less than or equal to the second charging power, so as to ensure that the charging power of the first energy storage device is less than the demand threshold and the rated charging power of the first energy storage device.

[0113] exist Figure 2 In the energy storage control method shown, when the first energy storage device is in a charging state, the EMS determines the smaller value of the demand threshold value and the rated charging power of the first energy storage device as the first charging power, determines the product of the first charging power and the proportionality coefficient less than 1 as the second charging power, and sends the second charging power to the first energy storage device so that the charging power of the first energy storage device does not exceed the second charging power. It can be seen that the EMS can ensure that the charging power of the energy storage device does not exceed the demand threshold value of the energy storage device according to the proportionality coefficient and the demand threshold value and the rated charging power of the energy storage device, and can ensure that the charging power of the energy storage device does not exceed the demand limit, thereby ensuring the benefits.

[0114] Based on the above network architecture, Figure 3 is a flow chart of another energy storage control method provided in an embodiment of the present application. The energy storage control method is applied to EMS. Figure 3 As shown, the energy storage control method may include the following steps.

[0115] 301. Determine whether the first energy storage device is in a charging state. If it is determined that the first energy storage device is in a charging state, execute step 302. If it is determined that the first energy storage device is in a discharging state, execute step 305.

[0116] The first energy storage device is any energy storage device managed by the EMS.

[0117] The EMS can monitor the working state of the first energy storage device in real time. For a detailed description of the working state of the first energy storage device, please refer to the detailed description below step 201.

[0118] After the EMS monitors the working state of the first energy storage device, it can determine whether the first energy storage device is in a charging state. If it is determined that the first energy storage device is in a charging state, it indicates that demand control of the first energy storage device is required, and step 302 can be executed. If it is determined that the first energy storage device is in a discharging state, step 305 can be executed.

[0119] 302. Determine a smaller value between a demand threshold value and a rated charging power of the first energy storage device as a first charging power.

[0120] When the first energy storage device is in a charging state, the EMS may determine a smaller value between a demand threshold and a rated charging power of the first energy storage device as the first charging power. For detailed description, please refer to the relevant description below step 201.

[0121] 303. Determine the product of the first charging power and the proportional coefficient as the second charging power.

[0122] 304. Send a second charging power to the first energy storage device.

[0123] Accordingly, the first energy storage device receives the second charging power from the EMS.

[0124] For the detailed description of step 303 - step 304 , reference may be made to the description of step 202 - step 203 .

[0125] 305. Obtain the real-time discharge power of the gateway.

[0126] When the first energy storage device is in a discharging state, the EMS can obtain the real-time discharge power of the gateway in real time or periodically. The real-time discharge power of the gateway is the current discharge power of the gateway. The EMS can obtain the real-time discharge power of the gateway from the electric meter of the gateway.

[0127] 306. Determine a smaller value between the real-time discharge power of the gateway and the rated discharge power of the first energy storage device as a discharge power threshold.

[0128] After the EMS obtains the real-time discharge power of the gateway, it can compare the real-time discharge power of the gateway with the rated discharge power of the first energy storage device, and then determine the smaller value of the real-time discharge power of the gateway and the rated discharge power of the first energy storage device as the discharge power threshold according to the comparison result. The rated discharge power of the first energy storage device is the maximum discharge power of the first energy storage device, which is determined when the first energy storage device leaves the factory.

[0129] 307. Send a discharge power threshold to the first energy storage device.

[0130] After the EMS determines the discharge power threshold, it can send the discharge power threshold to the first energy storage device. After the first energy storage device receives the discharge power threshold, it can make the discharge power not exceed the discharge power threshold, that is, ensure that the discharge power is less than or equal to the discharge power threshold, so as to ensure that the discharge power of the first energy storage device is less than or equal to the real-time discharge power of the gateway, and avoid the situation where the discharge power of the first energy storage device is greater than the real-time discharge power of the gateway so that the current of the first energy storage device flows back to the gateway.

[0131] exist Figure 3 In the energy storage control method shown, when the first energy storage device is in a charging state, the EMS determines the smaller value of the demand threshold and the rated charging power of the first energy storage device as the first charging power, determines the product of the first charging power and the proportionality coefficient less than 1 as the second charging power, and sends the second charging power to the first energy storage device so that the charging power of the first energy storage device does not exceed the second charging power; when the first energy storage device is in a discharging state, the real-time discharge power of the gateway is obtained, and the smaller value of the real-time discharge power of the gateway and the rated discharge power of the first energy storage device is determined as the discharge power threshold, and the discharge power threshold is sent to the first energy storage device so that the discharge power of the first energy storage device does not exceed the discharge power threshold. It can be seen that when the energy device is in a charging state, the EMS can ensure that the charging power of the energy storage device does not exceed the demand threshold of the energy storage device according to the proportionality coefficient and the demand threshold and rated charging power of the energy storage device, and can ensure that the charging power of the energy storage device does not exceed the demand limit, thereby ensuring the profit. In addition, when the first energy storage device is in a discharging state, it can be ensured that the discharge power of the energy storage device does not exceed the real-time discharge power of the gateway, and the situation that the discharge power of the first energy storage device is greater than the real-time discharge power of the gateway so that the current of the first energy storage device flows back to the gateway can be avoided, thereby avoiding the waste of electric energy.

[0132] Based on the above network architecture, Figure 4 is a flow chart of another energy storage control method provided in an embodiment of the present application. The energy storage control method is applied to EMS. Figure 4 As shown, the energy storage control method may include the following steps.

[0133] 401. Receive a demand threshold of a first energy storage device from a server.

[0134] In some embodiments, the demand threshold of the first energy storage device may be determined by the server and then sent to the EMS. Accordingly, the EMS may receive the demand threshold of the first energy storage device from the server. In one case, when there is a historical demand value of the first energy storage device, the server may determine the demand threshold of the first energy storage device based on the historical demand value of the first energy storage device. For a detailed description, please refer to the relevant description on the server side. In another case, when there is no historical demand value of the first energy storage device, the server may determine the demand threshold of the first energy storage device based on the user setting.

[0135] In some embodiments, the EMS may detect a user's setting operation on a demand threshold of the first energy storage device, and may determine the demand threshold of the first energy storage device in response to the setting operation. It can be seen that the user may also set the demand threshold of the energy storage device in the EMS based on experience. In this case, the EMS does not perform step 401.

[0136] 402. Receive dangerous time periods and safe time periods from a server.

[0137] The dangerous period and safe period of the first energy storage device can be determined by the server according to the historical demand value of the first energy storage device and then sent to the EMS. Accordingly, the EMS can receive the dangerous period and safe period of the first energy storage device from the server. The detailed description of the server determining the dangerous period and safe period of the first energy storage device can refer to the relevant description on the server side.

[0138] The dangerous period is a period during which the probability that the demand value of the first energy storage device exceeds the demand threshold is high. The safe period is a period during which the probability that the demand value of the first energy storage device exceeds the demand threshold is low.

[0139] 403. Send the dangerous period and the safe period to the first energy storage device, so that the first energy storage device adjusts the charging power and the discharging power with the first step length during the dangerous period, and adjusts the charging power and the discharging power with the second step length during the safe period.

[0140] After receiving the dangerous period and the safe period of the first energy storage device, the EMS can send the dangerous period and the safe period to the first energy storage device. After receiving the dangerous period and the safe period, the first energy storage device can adjust the charging power and the discharging power with the first step length in the dangerous period, and can adjust the charging power and the discharging power with the second step length in the safe period, and the first step length is smaller than the second step length. It can be seen that the step length of the energy storage device to adjust the charging and discharging power in the dangerous period is smaller than the step length of the charging and discharging power in the safe period, which can ensure the safety of the charging and discharging power in the dangerous period.

[0141] 404. Determine a real-time demand value of the first energy storage device.

[0142] The EMS may periodically determine the real-time demand value of the first energy storage device. When the demand threshold of the first energy storage device is determined according to the historical demand value of the first energy storage device, or the dangerous period and the safe period of the first energy storage device are determined according to the historical demand value of the first energy storage device, or the demand threshold of the first energy storage device needs to be updated, the EMS may periodically determine the real-time demand value of the first energy storage device.

[0143] In some embodiments, the electric meter set on the gateway is a demand meter. Therefore, the EMS can periodically obtain the real-time demand value of the first energy storage device from the gateway. In one case, the EMS can periodically send an acquisition request to the gateway for obtaining the demand value of the first energy storage device. After the gateway receives the acquisition request, it can send the real-time demand value of the first energy storage device to the EMS according to the acquisition request. The EMS can receive the real-time demand value of the first energy storage device from the gateway. In another case, the gateway can actively and periodically send the real-time demand value of the first energy storage device to the EMS.

[0144] During the dangerous period, the EMS can obtain the real-time demand value of the first energy storage device at a third frequency, and during the safe period, the EMS can obtain the real-time demand value of the first energy storage device at a fourth frequency, and the third frequency is greater than the fourth frequency. Since the probability of the energy storage device exceeding the demand threshold during the dangerous period is higher, the real-time demand value of the energy storage device can be obtained at a higher frequency during the dangerous period than during the safe period, so as to better perform demand control and / or more accurately determine the safe period and the dangerous period.

[0145] When the gateway actively sends the real-time demand value of the first energy storage device to the EMS, and the sending frequencies during the dangerous period and the safe period are different, the EMS can also send the dangerous period and the safe period of the first energy storage device to the gateway, so that the gateway uses different frequencies to send the real-time demand value of the first energy storage device to the EMS during different time periods of the first energy storage device.

[0146] In some embodiments, the electric meter set at the gateway is an ordinary electric meter. EMS can periodically obtain the instantaneous charging power of the first energy storage device from the gateway, and then determine the real-time demand value of the first energy storage device based on the instantaneous charging power of the first energy storage device. After EMS obtains the instantaneous charging power of the first energy storage device within the demand period, it can calculate the average value of the instantaneous charging power of these first energy storage devices to obtain the real-time demand value of the first energy storage device. For a detailed description of EMS obtaining the instantaneous charging power of the first energy storage device from the gateway, please refer to the description of obtaining the real-time demand value of the first energy storage device from the gateway. The instantaneous charging power of the first energy storage device can be understood as the real-time discharge power of the gateway to the first energy storage device.

[0147] During the dangerous period, the EMS can obtain the instantaneous charging power of the first energy storage device at the fifth frequency, and during the safe period, the EMS can obtain the instantaneous charging power of the first energy storage device at the sixth frequency. The fifth frequency is greater than the sixth frequency. Since the probability of the energy storage device exceeding the demand threshold during the dangerous period is higher, the instantaneous charging power of the energy storage device can be obtained at a higher frequency during the dangerous period than during the safe period, so as to better perform demand control and / or more accurately determine the safe period and the dangerous period.

[0148] 405. When the real-time demand value of the first energy storage device is greater than the demand threshold of the first energy storage device, update the demand threshold of the first energy storage device to the real-time demand value of the first energy storage device.

[0149] The demand threshold of the first energy storage device may be fixed or updated according to an actual demand value.

[0150] In the case where the demand threshold of the first energy storage device is updated according to the actual demand value, after the EMS determines the real-time demand value of the first energy storage device, it can be determined whether the real-time demand value of the first energy storage device is greater than the demand threshold of the first energy storage device. In the case where it is determined that the real-time demand value of the first energy storage device is greater than the demand threshold of the first energy storage device, the demand threshold of the first energy storage device can be updated to the real-time demand value of the first energy storage device, that is, the demand threshold of the first energy storage device can be updated to the real-time demand value of the first energy storage device, which can ensure that the demand threshold of the first energy storage device is updated according to the change of the actual demand value, and the real-time and effectiveness of the demand threshold of the first energy storage device can be ensured. In the case where it is determined that the real-time demand value of the first energy storage device is less than or equal to the demand threshold of the first energy storage device, step 406 is not executed, which can reduce unnecessary processing processes, thereby saving processing resources.

[0151] 406. Send the real-time demand value of the first energy storage device to the server.

[0152] When the demand threshold of the first energy storage device is determined according to the historical demand value of the first energy storage device, or the dangerous period and the safe period of the first energy storage device are determined according to the historical demand value of the first energy storage device, or the demand threshold of the first energy storage device needs to be updated, after the EMS determines the real-time demand value of the first energy storage device, it can send the real-time demand value of the first energy storage device to the server. After the server receives the real-time demand value of the first energy storage device, it can store the real-time demand value of the first energy storage device. The server's use of the demand value of the first energy storage device can refer to the relevant description on the server side.

[0153] 407. Determine whether the first energy storage device is in a charging state. If it is determined that the first energy storage device is in a charging state, execute step 408. If it is determined that the first energy storage device is in a discharging state, execute step 411.

[0154] 408. Determine a smaller value between a demand threshold value and a rated charging power of the first energy storage device as a first charging power.

[0155] For the detailed description of step 407 - step 408 , reference may be made to the description of step 301 - step 302 .

[0156] 409. Determine the product of the first charging power and the proportional coefficient as the second charging power.

[0157] After the EMS determines the first charging power, it can compare the current time with the dangerous period and the safe period. If the current time belongs to the dangerous period, the product of the first charging power and the first proportional coefficient can be determined as the second charging power. If the current time belongs to the safe period, the product of the first charging power and the second proportional coefficient can be determined as the second charging power, and the second proportional coefficient is greater than the first proportional coefficient. The first proportional coefficient and the second proportional coefficient are less than 1. It can be seen that the proportional coefficient used by the energy storage device in the dangerous period is less than the proportional coefficient used in the safe period, which can better ensure that the demand value in the dangerous period will not exceed the demand threshold.

[0158] 410. Send a second charging power to the first energy storage device.

[0159] 411. Obtain the real-time discharge power of the gateway.

[0160] 412. Determine a smaller value between the real-time discharge power of the gateway and the rated discharge power of the first energy storage device as a discharge power threshold.

[0161] 413. Send a discharge power threshold to the first energy storage device.

[0162] For the detailed description of steps 410 to 413 , reference may be made to the description of steps 304 to 307 .

[0163] During the dangerous period, the EMS may determine the second charging power and the discharging power threshold at the first frequency, that is, during the dangerous period, the EMS performs steps 408 to 413 at the first frequency. During the safe period, the EMS may determine the second charging power and the discharging power threshold at the second frequency, that is, during the dangerous period, the EMS performs steps 408 to 413 at the second frequency. The first frequency is greater than the second frequency.

[0164] It can be seen that EMS determines the charging and discharging power thresholds of energy storage equipment at a faster frequency during dangerous periods, which can ensure the safety of charging and discharging of energy storage equipment during dangerous periods.

[0165] exist Figure 4 In the energy storage control method shown, when the energy device is in a charging state, the EMS can ensure that the charging power of the energy storage device does not exceed the demand threshold of the energy storage device according to the proportional coefficient and the demand threshold and rated charging power of the energy storage device, and can ensure that the charging power of the energy storage device does not exceed the demand limit, thereby ensuring the benefits. In addition, when the first energy storage device is in a discharging state, it can be ensured that the discharge power of the energy storage device does not exceed the real-time discharge power of the gateway, and the discharge power of the first energy storage device can be avoided to be greater than the real-time discharge power of the gateway so that the current of the first energy storage device flows back to the gateway, thereby avoiding the waste of electric energy. Further, the EMS can update the demand threshold of the energy storage device according to the real-time demand value of the energy storage device, and can ensure the real-time and effectiveness of the demand threshold of the energy storage device, so as to better perform demand control. Further, the EMS can report the real-time demand value of the energy storage device to the server so that the server can determine or update the dangerous period and safe period of the energy storage device, and can ensure the real-time and effectiveness of the demand threshold of the energy storage device, so as to better perform demand control and save the processing resources of the EMS.

[0166] Based on the above network architecture, Figure 5 is a flow chart of another energy storage control method provided in an embodiment of the present application. The energy storage control method is applied to a server. Figure 5 As shown, the energy storage control method may include the following steps.

[0167] 501. Obtain a historical demand value of a first energy storage device in a first time period.

[0168] The server may obtain the historical demand value of the first energy storage device in the first time period. The first energy storage device is any energy storage device managed by the EMS managed by the server.

[0169] In one case, the server stores historical demand values ​​of the first energy storage device, and can obtain the stored historical demand values ​​of the first energy storage device in the first time period.

[0170] In another case, the historical demand values ​​of the energy storage device may be stored in a database. The server may obtain the historical demand values ​​of the first energy storage device in the first time period from the database.

[0171] The first time period may be one day, one hour, 12 hours, or other values, and may be set as required without limitation.

[0172] 502. Determine a maximum demand value among historical demand values ​​in a first time period as a demand threshold of a first energy storage device.

[0173] After the server obtains the historical demand value of the first energy storage device in the first time period, the maximum demand value among the historical demand values ​​in the first time period can be determined as the demand threshold of the first energy storage device. The server can sort the historical demand values ​​of the first energy storage device in the first time period in order from large to small, and then determine the historical demand value at the front of the sort as the demand threshold of the first energy storage device.

[0174] It should be understood that, in the case where the demand threshold of the first energy storage device is updated, the demand threshold of the first energy storage device determined here is the initial demand threshold of the first energy storage device.

[0175] 503. Send a demand threshold of the first energy storage device to the EMS, where the demand threshold of the first energy storage device is used by the EMS to determine the second charging power so that the charging power of the first energy storage device does not exceed the second charging power.

[0176] After the server determines the demand threshold of the first energy storage device, it can send the demand threshold of the first energy storage device to the EMS, so that the EMS can determine a second charging power that is less than or equal to the demand threshold of the first energy storage device based on the demand threshold of the first energy storage device, so that the charging power of the first energy storage device does not exceed the second charging power. For detailed description, please refer to the relevant description on the EMS side above.

[0177] exist Figure 5 In the energy storage control method shown, the server obtains the historical demand value of the first energy storage device in the first time period, determines the maximum demand value among the historical demand values ​​in the first time period as the demand threshold of the first energy storage device, and sends the demand threshold of the first energy storage device to the EMS. The demand threshold of the first energy storage device is used by the EMS to determine the second charging power so that the charging power of the first energy storage device does not exceed the second charging power. It can be seen that the server can determine the demand threshold of the energy storage device based on the historical demand value of the energy storage device and send it to the EMS, so that the EMS determines the charging power threshold of the energy storage device that is less than or equal to the demand threshold of the energy storage device based on the demand threshold of the energy storage device, which can ensure that the charging power of the energy storage device does not exceed the demand threshold of the energy storage device, thereby ensuring the profit.

[0178] Based on the above network architecture, Figure 6 is a flow chart of another energy storage control method provided in an embodiment of the present application. The energy storage control method is applied to a server. Figure 6 As shown, the energy storage control method may include the following steps.

[0179] 601. Receive a real-time demand value of a first energy storage device from an EMS, and store the real-time demand value of the first energy storage device.

[0180] When the EMS periodically reports the real-time demand value of the first energy storage device to the server, the server may periodically receive the real-time demand value of the first energy storage device from the EMS, and then store the real-time demand value of the first energy storage device for subsequent call.

[0181] 602. Obtain a historical demand value of a first energy storage device in a first time period.

[0182] 603. Determine a maximum demand value among the historical demand values ​​in the first time period as a demand threshold of the first energy storage device.

[0183] 604. Send a demand threshold of the first energy storage device to the EMS, where the demand threshold of the first energy storage device is used by the EMS to determine the second charging power so that the charging power of the first energy storage device does not exceed the second charging power.

[0184] The detailed description of step 602 to step 604 may refer to the description of step 501 to step 503 .

[0185] 605. Obtain a historical demand value of the first energy storage device in the second time period.

[0186] 606. Determine a dangerous period and a safe period of the first energy storage device according to the historical demand value of the second time period.

[0187] If there is historical data of the first energy storage device, the server can determine the dangerous period and safe period of the first energy storage device based on the historical data of the first energy storage device. If there is no historical data of the first energy storage device, the server can determine the dangerous period and safe period of the first energy storage device based on user settings.

[0188] In the case where there is historical data of the first energy storage device, the server can first obtain the historical demand value of the first energy storage device in the second time period, and then determine the dangerous time period and safe time period of the first energy storage device according to the historical demand value of the second time period. The second time period can be in units of months, weeks, or other time units.

[0189] After the server obtains the historical demand values ​​of the second time period, the average value of the historical demand values ​​of the second time period can be determined to obtain a first average value, and then the number of historical demand values ​​in the second time period that are greater than the first average value can be determined to obtain a first number, and the ratio of the first number to the total number of historical demand values ​​in the second time period can be determined as a first ratio, and the time information of the historical demand values ​​in the second time period that are greater than the first average value can be counted, that is, the number of historical demand values ​​in the second time period that are greater than the first average value and the time period in which they are located can be determined. When the ratio of the number of historical demand values ​​in the first time period that are greater than the first average value to the total number of historical demand values ​​in the first time period is greater than the first ratio, the first time period can be determined as a dangerous time period, and can be determined as a safe time period based on the dangerous time period.

[0190] The duration of the second time period may be the same as or different from the total duration of the safe time period and the dangerous time period. For example, it is assumed that the second time period is divided into months, while the dangerous time period and the safe time period are divided into days.

[0191] Exemplarily, after the server obtains the historical demand values ​​for a month, it can determine the average value of the historical demand values ​​for this month to obtain a first average value, and then determine the number of historical demand values ​​in the historical demand values ​​for this month that are greater than the first average value to obtain a first number, and the ratio of the first number to the total number of historical demand values ​​for this month can be determined as a first ratio, and the number of historical demand values ​​in the historical demand values ​​for this month that are greater than the first average value and the time information of each day can be determined. When the ratio of the number of historical demand values ​​greater than the first average value from 20:00 to 21:00 to the total number of historical demand values ​​from 20:00 to 21:00 is greater than the first ratio, 20:00-21:00 can be determined as a dangerous period, and the period of the day other than the dangerous period can be determined as a safe period.

[0192] The dangerous period may include one period or multiple periods.

[0193] It should be understood that the safe period and dangerous period determined in step 605 are the initial safe period and dangerous period.

[0194] 607. Send the dangerous period and the safe period of the first energy storage device to the EMS, where the dangerous period is used for the EMS to determine the second charging power using the first proportional coefficient, and the safe period is used for the EMS to determine the second charging power using the second proportional coefficient.

[0195] The second proportionality coefficient is greater than the first proportionality coefficient.

[0196] The server determines the dangerous period and the safe period of the first energy storage device, and can send the dangerous period and the safe period of the first energy storage device to the EMS. The functions of the dangerous period and the safe period can refer to the relevant description of the EMS side above.

[0197] 608. Obtain a historical demand value of the first energy storage device in a third time period.

[0198] 609. Update the dangerous time period and the safe time period of the first energy storage device according to the historical demand value of the third time period.

[0199] 610. Send updated dangerous time periods and safe time periods of the first energy storage device to the EMS.

[0200] After the server determines the dangerous period and the safe period of the first energy storage device, it can periodically obtain the historical demand value of the first energy storage device in the third time period. The third time period is a time period after the second time period and the same length as the second time period. Exemplarily, the server can obtain the historical demand value of the first energy storage device in the previous month at the beginning of each month.

[0201] After the server obtains the historical demand value of the third time period, it can update the dangerous time period and safe time period of the first energy storage device according to the historical demand value of the third time period, and then send the updated dangerous time period and safe time period of the first energy storage device to the EMS. After the EMS receives the updated dangerous time period and safe time period of the first energy storage device, it can use the updated dangerous time period and safe time period of the first energy storage device. It can be seen that the server can periodically update the dangerous time period and safe time period of the energy storage device.

[0202] The server can determine the average value of the historical demand values ​​in the third time period to obtain a second average value, can determine the number of demand values ​​in the historical demand values ​​in the third time period that are greater than the second average value to obtain a second number, can determine the ratio of the second number to the total number of historical demand values ​​in the third time period to obtain a second ratio, and when the ratio of the number of historical demand values ​​greater than the second average value in the second time period to the total number of historical demand values ​​in the second time period is greater than the second ratio, the dangerous time period of the first energy storage device can be updated to the union of the stored dangerous time period of the first energy storage device and the second time period, and then the safe time period can be updated according to the updated dangerous time period.

[0203] It can be seen that when the server updates the dangerous period, it determines the union of the newly determined dangerous period and the previous dangerous period as the updated dangerous period. Exemplarily, the dangerous period of the first energy storage device is 20:00-21:00, the newly determined dangerous period is 21:30-22:00, and the updated dangerous period of the first energy storage device is 20:00-21:00 and 21:30-22:00.

[0204] exist Figure 6 In the energy storage control method shown, the server can determine the demand threshold of the energy storage device based on the historical demand value of the energy storage device and send it to the EMS, so that the EMS can determine the charging power threshold of the energy storage device that is less than or equal to the demand threshold of the energy storage device based on the demand threshold of the energy storage device, which can ensure that the charging power of the energy storage device does not exceed the demand threshold of the energy storage device, thereby ensuring the benefits. In addition, the server can determine the dangerous time period and safe time period of the energy storage device based on the historical demand value of the energy storage device and send it to the EMS, so that the EMS can use different control logics to better ensure that the charging power of the energy storage device does not exceed the demand threshold of the energy storage device based on the dangerous time period and safe time period of the energy storage device. Furthermore, the server can update the dangerous time period and safe time period of the energy storage device based on the historical demand value of the energy storage device and send it to the EMS, which can ensure the real-time and effectiveness of the dangerous time period and safe time period of the energy storage device.

[0205] It should be understood that the same or corresponding contents in different embodiments may be referenced to each other.

[0206] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0207] Based on the same inventive concept, the embodiment of the present application also provides an energy storage control device for implementing the energy storage control method involved above. The implementation solution provided by the energy storage control device to solve the problem is similar to the implementation solution recorded in the above energy storage control method, so the specific limitations in one or more energy storage control device embodiments provided below can refer to the limitations of the energy storage control method above, and will not be repeated here.

[0208] Based on the above network architecture, Figure 7 : is a schematic diagram of the structure of an energy storage control device provided in an embodiment of the present application. The energy storage control device can be applied to EMS. The energy storage control device may include:

[0209] A determining unit 701 is configured to determine, when the first energy storage device is in a charging state, a smaller value between a demand threshold and a rated charging power of the first energy storage device as a first charging power, wherein the first energy storage device is any energy storage device managed by the EMS;

[0210] The determining unit 701 is further configured to determine the product of the first charging power and the proportionality coefficient as the second charging power, where the proportionality coefficient is less than 1;

[0211] The communication unit 702 is used to send the second charging power to the first energy storage device, so that the charging power of the first energy storage device does not exceed the second charging power.

[0212] In some embodiments, the energy storage control device may further include:

[0213] An acquisition unit, used to acquire the real-time discharge power of the gateway when the first energy storage device is in a discharging state;

[0214] The determination unit 701 is further configured to determine the smaller value between the real-time discharge power of the gateway and the rated discharge power of the first energy storage device as a discharge power threshold;

[0215] The communication unit 702 is further configured to send a discharge power threshold to the first energy storage device, so that the discharge power of the first energy storage device does not exceed the discharge power threshold.

[0216] In some embodiments, the determining unit 701 determines the product of the first charging power and the proportional coefficient as the second charging power, including:

[0217] When the current time belongs to a dangerous period, the product of the first charging power and the first proportional coefficient is determined as the second charging power;

[0218] When the current time belongs to the safe period, the product of the first charging power and the second proportional coefficient is determined as the second charging power, the first proportional coefficient and the second proportional coefficient are less than 1, and the second proportional coefficient is greater than the first proportional coefficient;

[0219] The second charging power and discharging power thresholds are determined at a first frequency during the dangerous period, and at a second frequency during the safe period, wherein the first frequency is greater than the second frequency.

[0220] In some embodiments, the determination unit 701 is further configured to determine a real-time demand value of the first energy storage device;

[0221] The energy storage control device may further include:

[0222] The updating unit is used to update the demand threshold of the first energy storage device to the real-time demand value of the first energy storage device when the real-time demand value of the first energy storage device is greater than the demand threshold of the first energy storage device.

[0223] In some embodiments, the communication unit 702 is further configured to receive a demand threshold of the first energy storage device from the server, where the demand threshold of the first energy storage device is determined according to a historical demand value of the first energy storage device.

[0224] In some embodiments, the communication unit 702 is further used to receive the dangerous period and the safe period from the server, and the dangerous period and the safe period are determined according to the historical demand value of the first energy storage device.

[0225] In some embodiments, the communication unit 702 is further used to send the real-time demand value of the first energy storage device to the server, and the real-time demand value of the first energy storage device is used by the server to determine or update the dangerous period and the safe period.

[0226] In some embodiments, the communication unit 702 is also used to send dangerous periods and safe periods to the first energy storage device, so that the first energy storage device adjusts the charging power and discharging power with a first step size during the dangerous period, and adjusts the charging power and discharging power with a second step size during the safe period, and the first step size is smaller than the second step size.

[0227] Based on the above network architecture, Figure 8 : is a schematic diagram of the structure of another energy storage control device provided in an embodiment of the present application. The energy storage control device can be applied to a server. The energy storage control device may include:

[0228] An acquisition unit 801 is used to acquire a historical demand value of a first energy storage device in a first time period, where the first energy storage device is any energy storage device managed by an EMS managed by a server;

[0229] A determining unit 802 is configured to determine a maximum demand value among historical demand values ​​in a first time period as a demand threshold value of a first energy storage device;

[0230] The communication unit 803 is used to send a demand threshold of the first energy storage device to the EMS, where the demand threshold of the first energy storage device is used by the EMS to determine the second charging power so that the charging power of the first energy storage device does not exceed the second charging power.

[0231] In some embodiments, the acquisition unit 801 is further used to acquire a historical demand value of the first energy storage device in the second time period;

[0232] The determination unit 802 is further used to determine the dangerous time period and the safe time period of the first energy storage device according to the historical demand value of the second time period;

[0233] The communication unit 803 is also used to send the dangerous period and safe period of the first energy storage device to the EMS. The dangerous period of the first energy storage device is used by the EMS to determine the second charging power using the first proportional coefficient, and the safe period of the first energy storage device is used by the EMS to determine the second charging power using the second proportional coefficient, and the second proportional coefficient is greater than the first proportional coefficient.

[0234] In some embodiments, the determining unit 802 determines the dangerous period and the safe period of the first energy storage device according to the historical demand value of the second time period, including:

[0235] Determine the average value of the historical demand values ​​in the second time period to obtain a first average value;

[0236] Determine the number of historical demand values ​​greater than the first average value in the historical demand values ​​of the second time period to obtain a first number;

[0237] Determine a ratio of the first quantity to the total quantity of historical demand values ​​in the second time period to obtain a first ratio;

[0238] When the ratio of the number of historical demand values ​​greater than the first average value in the first time period to the total number of historical demand values ​​in the first time period is greater than the first ratio, determining the first time period as a dangerous time period for the first energy storage device;

[0239] The dangerous period of the first energy storage device is determined as the safe period of the first energy storage device.

[0240] In some embodiments, the acquisition unit 801 is further used to acquire a historical demand value of the first energy storage device in a third time period, where the third time period is a time period after the second time period and has the same duration as the second time period;

[0241] The energy storage control device may include:

[0242] An updating unit, configured to update the dangerous time period and the safe time period of the first energy storage device according to the historical demand value of the third time period;

[0243] The communication unit 803 is further used to send updated dangerous time periods and safe time periods of the first energy storage device to the EMS.

[0244] In some embodiments, the updating unit is specifically configured to:

[0245] Determine the average value of the historical demand values ​​in the third time period to obtain a second average value;

[0246] Determine the number of demand values ​​greater than the second average value in the historical demand values ​​of the third time period to obtain a second number;

[0247] determining a ratio of the second quantity to a total quantity of historical demand values ​​in a third time period to obtain a second ratio;

[0248] When the ratio of the number of historical demand values ​​greater than the second mean value in the second time period to the total number of historical demand values ​​in the second time period is greater than the second ratio, updating the dangerous time period of the first energy storage device to the union of the dangerous time period of the first energy storage device and the second time period;

[0249] The safe period of the first energy storage device is updated according to the updated dangerous period.

[0250] In some embodiments, the communication unit 803 is further configured to receive a real-time demand value of the first energy storage device from the EMS;

[0251] The energy storage control device may include:

[0252] The storage unit is used to store the real-time demand value of the first energy storage device.

[0253] Each unit in the above energy storage control device can be implemented in whole or in part by software, hardware, or a combination thereof. Each unit can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in a computer device in the form of software, so that the processor can call and execute the operations corresponding to each unit above.

[0254] Based on the above network architecture, Fig. 9 : This is a structural diagram of a computer device provided in an embodiment of the present application. The computer device may be an EMS or a server. The computer device may include a processor, a memory, an input / output interface (Input / Output, referred to as I / O) and a communication interface. Among them, the processor, the memory and the input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used to store historical demand values, dangerous periods and safe periods of a first energy storage device. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external EMS through a network connection. When the computer program is executed by the processor, a method for energy storage control is implemented.

[0255] Those skilled in the art will understand that Fig. 9The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0256] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps of the above energy storage control method are implemented.

[0257] It should be noted that the information of the energy storage equipment involved in this application (including but not limited to the demand value of the energy storage equipment) is information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant regulations.

[0258] Those of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, an artificial intelligence (AI) processor, etc., but are not limited to this.

[0259] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0260] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the present application. It should be noted that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A method for controlling energy storage, characterized in that: Applied to an electric energy management system (EMS), the method comprises: When the first energy storage device is in a charging state, a smaller value between a demand threshold and a rated charging power of the first energy storage device is determined as a first charging power, and the first energy storage device is any energy storage device managed by the EMS; Determine the product of the first charging power and a proportional coefficient as a second charging power, wherein the proportional coefficient is less than 1; The second charging power is sent to the first energy storage device so that the charging power of the first energy storage device does not exceed the second charging power.

2. The method according to claim 1, characterized in that The method further comprises: When the first energy storage device is in a discharging state, obtaining a real-time discharge power of the gateway; Determine the smaller value between the real-time discharge power of the gateway and the rated discharge power of the first energy storage device as a discharge power threshold; The discharge power threshold is sent to the first energy storage device so that the discharge power of the first energy storage device does not exceed the discharge power threshold.

3. The method according to claim 2, characterized in that The step of determining the second charging power by multiplying the first charging power by the proportional coefficient includes: When the current time belongs to a dangerous period, the product of the first charging power and the first proportional coefficient is determined as the second charging power; When the current time belongs to the safe period, the product of the first charging power and the second proportional coefficient is determined as the second charging power, the first proportional coefficient and the second proportional coefficient are less than 1, and the second proportional coefficient is greater than the first proportional coefficient; The second charging power and the discharging power threshold are determined at a first frequency during the dangerous period, and at a second frequency during the safe period, wherein the first frequency is greater than the second frequency.

4. The method according to any one of claims 1 to 3, characterized in that: The method further comprises: Determining a real-time demand value of the first energy storage device; When the real-time demand value of the first energy storage device is greater than the demand threshold of the first energy storage device, the demand threshold of the first energy storage device is updated to the real-time demand value of the first energy storage device.

5. The method according to any one of claims 1 to 3, characterized in that: The method further comprises: A demand threshold of the first energy storage device is received from a server, where the demand threshold of the first energy storage device is determined according to a historical demand value of the first energy storage device.

6. The method according to claim 3, characterized in that The method further comprises: The dangerous period and the safe period are received from a server, where the dangerous period and the safe period are determined according to a historical demand value of the first energy storage device.

7. The method according to claim 6, characterized in that The method further comprises: The real-time demand value of the first energy storage device is sent to the server, and the real-time demand value of the first energy storage device is used by the server to determine or update the dangerous time period and the safe time period.

8. The method according to claim 6, characterized in that The method further comprises: The dangerous period and the safe period are sent to the first energy storage device, so that the first energy storage device adjusts the charging power and the discharging power with a first step length during the dangerous period and adjusts the charging power and the discharging power with a second step length during the safe period, and the first step length is smaller than the second step length.

9. A method for controlling energy storage, characterized in that: Applied to a server, the method comprises: Acquire a historical demand value of a first energy storage device in a first time period, where the first energy storage device is any energy storage device managed by an electric energy management system EMS managed by the server; Determining a maximum demand value among the historical demand values ​​in the first time period as a demand threshold of the first energy storage device; The demand threshold is sent to the EMS, where the demand threshold is used by the EMS to determine a second charging power so that the charging power of the first energy storage device does not exceed the second charging power.

10. The method according to claim 9, characterized in that The method further comprises: Obtaining a historical demand value of the first energy storage device in a second time period; Determining a dangerous period and a safe period of the first energy storage device according to the historical demand value of the second time period; The dangerous period and the safe period are sent to the EMS, wherein the dangerous period is used by the EMS to determine the second charging power using a first proportional coefficient, and the safe period is used by the EMS to determine the second charging power using a second proportional coefficient, wherein the second proportional coefficient is greater than the first proportional coefficient.

11. The method according to claim 10, characterized in that The determining the dangerous time period and the safe time period of the first energy storage device according to the historical demand value of the second time period includes: Determine an average value of the historical demand values ​​in the second time period to obtain a first average value; Determine the number of historical demand values ​​greater than the first average value in the historical demand values ​​of the second time period to obtain a first number; determining a ratio of the first number to a total number of historical demand values ​​for the second time period to obtain a first ratio; When the ratio of the number of historical demand values ​​greater than the first average value in the first time period to the total number of historical demand values ​​in the first time period is greater than the first ratio, determining the first time period as a dangerous time period for the first energy storage device; A safe period for the first energy storage device is determined according to the dangerous period.

12. The method according to claim 10, characterized in that The method further comprises: Acquire a historical demand value of the first energy storage device in a third time period, where the third time period is a time period after the second time period and has the same length as the second time period; updating the dangerous period and the safe period according to the historical demand value of the third time period; The updated dangerous period and the safe period are sent to the EMS.

13. The method according to claim 12, characterized in that The updating of the dangerous period and the safe period according to the historical demand value of the third time period comprises: Determine an average value of the historical demand values ​​in the third time period to obtain a second average value; Determine the number of demand values ​​greater than the second average value in the historical demand values ​​of the third time period to obtain a second number; determining a ratio of the second number to a total number of historical demand values ​​for the third time period to obtain a second ratio; When the ratio of the number of historical demand values ​​greater than the second average value in the second period to the total number of historical demand values ​​in the second period is greater than the second ratio, updating the dangerous period to the union of the dangerous period and the second period; The safe period is updated according to the updated dangerous period.

14. The method according to any one of claims 9 to 13, characterized in that: The method further comprises: receiving a real-time demand value of the first energy storage device from the EMS; The real-time demand value of the first energy storage device is stored.

15. An energy storage control device, characterized in that: Applied to an electric energy management system (EMS), the device comprises: a determining unit, configured to determine, when the first energy storage device is in a charging state, a smaller value between a demand threshold and a rated charging power of the first energy storage device as a first charging power, wherein the first energy storage device is any energy storage device managed by the EMS; The determining unit is further configured to determine a second charging power by multiplying the first charging power by a proportional coefficient, wherein the proportional coefficient is less than 1; A communication unit is used to send the second charging power to the first energy storage device so that the charging power of the first energy storage device does not exceed the second charging power.

16. An energy storage control device, characterized in that: Applied to a server, the device comprises: An acquiring unit, configured to acquire a historical demand value of a first energy storage device in a first time period, wherein the first energy storage device is any energy storage device managed by an electric energy management system EMS managed by the server; a determining unit, configured to determine a maximum demand value among the historical demand values ​​in the first time period as a demand threshold value of the first energy storage device; A communication unit is used to send the demand threshold to the EMS, where the demand threshold is used by the EMS to determine a second charging power so that the charging power of the first energy storage device does not exceed the second charging power.

17. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 14 are implemented.

18. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 14 are implemented.

19. A computer program product comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 14 are implemented.

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