Energy management method and management system suitable for grid-connected energy storage system

Abstract

The invention relates to an energy management method and management system suitable for a grid-connected energy storage system, and relates to the field of energy management, and the method comprises the steps: 100, collecting energy storage parameters; 101, determining a power supply unit according to the energy storage parameters; step 102, determining a power supply specification based on the power supply unit, and calling a power grid specification; step 103, comparing the power supply specification with the power grid specification to determine a specification multiplying power, and determining a power supply current based on the power supply unit; 104, the heating rate is determined by combining the specification multiplying power and the power supply current; step 105, determining an overheating unit in response to the heating rate; and 106, generating and displaying a power supply overheating prompt according to the overheating unit. The application has the effects of improving the operation stability of the grid-connected energy storage system and reducing the condition of temperature abnormity when the energy specification is converted.

Description

Technical Field

[0001] This invention relates to the field of energy management, and in particular to an energy management method and management system suitable for grid-connected energy storage systems. Background Technology

[0002] Grid-connected energy storage systems refer to energy storage devices and their supporting control systems that can achieve bidirectional energy interaction with the public power grid and accept grid dispatch management.

[0003] In existing technologies, grid-connected energy storage systems generally contain multiple energy storage devices. These devices have different structures and store energy from different sources, such as hydropower, thermal power, and wind power. This results in different energy specifications within the devices. When energy interaction with the public grid is required, the energy in the energy storage unit must first be converted to the same energy specifications as the public grid.

[0004] Heat is easily generated during energy conversion, and the greater the conversion range and the more total amount of energy converted, the more heat is generated, which can lead to excessively high temperatures in energy storage devices and consequently damage to them. Summary of the Invention

[0005] To improve the operational stability of grid-connected energy storage systems and reduce temperature anomalies during energy specification conversion, this invention provides an energy management method and management system suitable for grid-connected energy storage systems.

[0006] In a first aspect, the present invention provides an energy management method applicable to grid-connected energy storage systems, employing the following technical solution: An energy management method applicable to grid-connected energy storage systems includes: Step 100: Collect energy storage parameters; Step 101: Determine the power supply unit based on the energy storage parameters; Step 102: Determine the power supply specifications based on the power supply unit and retrieve the power grid specifications; Step 103: Compare the power supply specifications and the power grid specifications to determine the specification ratio, and determine the power supply current based on the power supply unit; Step 104: Determine the heating rate by combining the specified multiplier and the power supply current; Step 105: Determine the overheating unit in response to the heating rate; Step 106: Generate and display a power supply overheating warning based on the overheating unit.

[0007] By adopting the above technical solution, the difference between the energy specifications in the energy storage device and the energy specifications of the grid is compared, thereby predicting the heating status of each energy storage device, identifying and alerting staff to energy storage devices with abnormal temperatures, reducing the occurrence of abnormal temperatures when converting energy specifications, and improving the operational stability of grid-connected energy storage systems.

[0008] Optional, also includes: Step 107: Determine the overheating location based on the overheating unit; Step 108: Determine the heat distribution based on the overheated location and heating rate; Step 109: Determine the high-temperature region and high-temperature moment from the thermal distribution; Step 110: Update the power supply overheat warning in response to the high temperature area and high temperature time.

[0009] By adopting the above technical solution, the heat accumulation can be predicted according to the heating status of the energy storage device, thereby predicting the temperature change over time in the grid-connected energy storage system when multiple energy storage devices are heating up simultaneously. This allows for the identification of the time when the temperature in each area of ​​the grid-connected energy storage system is abnormal, improving the accuracy of temperature anomaly identification.

[0010] Optional, also includes: Step 111: Identify the power supply capacity from the energy storage parameters based on the power supply unit; Step 112: Calculate the quotient of the power supply and the power supply current, and define it as the power supply duration; Step 113: When the power supply duration is lower than the preset power shortage threshold, determine the replacement unit from the energy storage parameters based on the grid specifications; Step 114: In response to the replacement unit generating and displaying a power supply replacement prompt.

[0011] By adopting the above technical solution, the remaining energy in the energy storage device can be detected in real time. When the energy in the energy storage device is low, the replacement unit with the energy specification closest to the grid can be selected to replace the energy storage device that has run out of power, thereby reducing the occurrence of abnormal temperature when switching energy specifications.

[0012] Optionally, it also includes a continuous power supply method, the continuous power supply method comprising: Step 200: When the power supply duration is lower than the preset power shortage threshold, determine the replacement type and replacement location based on the replacement unit; Step 201: Determine the active temperature based on the succession type; Step 202: Determine the thermal temperature based on the described thermal distribution and the location of the transition; Step 203: Update the replacement unit in response to the active temperature and thermal temperature.

[0013] By adopting the above technical solution, the power transmission efficiency of the same energy storage device varies at different temperatures. By consulting the structure of the energy storage device, the most suitable active temperature of the energy storage device can be determined. Then, a replacement unit that has reached the active temperature can be selected to replace the energy storage device that has run out of power, thereby improving the stability of the grid-connected energy storage system.

[0014] Optionally, the continuous power supply method further includes: Step 204: When the power supply duration is lower than the preset power shortage threshold, determine the power shortage time based on the power supply duration; Step 205: Determine the power shortage distribution from the thermal distribution based on the power shortage time; Step 206: Determine the heat distribution based on the described power shortage distribution; Step 207: Determine the replacement heat in response to the heat distribution and replacement location, and determine the thermal conductivity according to the replacement type; Step 208: Update the thermal temperature by combining the replacement heat and thermal conductivity.

[0015] By adopting the above technical solution, when the energy in the energy storage device is low, the moment when the energy in the energy storage device is exhausted can be determined. Then, the heat accumulation at each location can be calculated according to the temperature change, and the replacement unit that reaches the active temperature when the energy in the energy storage device is exhausted can be selected.

[0016] Optionally, the continuous power supply method further includes: Step 209: Determine the number of replacements based on the replacement units; Step 210: When the number of replacements is 0, calculate the absolute value of the difference between the thermal temperature and the active temperature, define it as the temperature difference value, and determine the temperature threshold in response to the thermal conductivity. Step 211: If the temperature difference is lower than the temperature threshold, determine the required heat by combining the active temperature and thermal conductivity; Step 212: Identify active locations from the heat distribution based on the required heat; Step 213: In response to the replacement unit and active location, generate and display a power activity suggestion.

[0017] By adopting the above technical solution, if there is no replacement unit that has just reached the active temperature when the energy storage device is depleted, an active location that meets the heat demand in the grid-connected energy storage system is found according to the heat shortage of the replacement unit, that is, a location closer to the energy storage device, so as to promptly notify the staff to adjust the position of the replacement unit so that the replacement unit reaches the active temperature.

[0018] Optionally, it also includes a position adjustment method, the position adjustment method comprising: Step 300: If the temperature difference is lower than the temperature threshold, determine the adjustment distance based on the active position and the successor position, and determine the movement threshold in response to the temperature threshold; Step 301: When the adjustment distance is greater than the movement threshold, determine the heat source location based on the replacement location and the overheating location; Step 302: Determine the heat source heat from the heat distribution based on the heat source location, and determine the heat source path according to the heat source location and the successor location; Step 303: Determine the superimposed heat based on the required heat and the heat source heat, and control the preset adjustment device to move the replacement unit according to the heat source path; Step 304: In response to the superimposed heat generation, display a unit active suggestion.

[0019] By adopting the above technical solution, when the heat generation of the energy storage device is insufficient, it is easy for the replacement position to fail to reach the active temperature. At this time, the heat deficiency can be judged according to the heat generation of the energy storage device, and the staff can be notified in time to improve the stability of the grid-connected energy storage system.

[0020] Optionally, the position adjustment method further includes: Step 305: When the adjustment distance is greater than the movement threshold, determine the auxiliary heating position based on the heat source position; Step 306: Generate an auxiliary heat distribution based on the auxiliary heat location and the power deficiency distribution, and identify the superposition distance from the auxiliary heat distribution based on the superimposed heat. Step 307: Determine the adjustment distance by combining the superposition distance, auxiliary heating position and heat source position, and determine the auxiliary heating unit according to the auxiliary heating position; Step 308: In response to the adjustment distance and the auxiliary heating unit, an adjustment stroke is generated; Step 309: Control the preset adjustment device to adjust the position of the auxiliary heating unit according to the adjustment stroke.

[0021] By adopting the above technical solution, when the energy storage device is not heating up enough, the other auxiliary heating unit that is currently supplying power closest to the energy storage device is identified, and the superposition distance between the auxiliary heating unit and the energy storage device is selected according to the lack of heat. The auxiliary heating unit is then moved according to the superposition distance to heat the replacement unit.

[0022] Optionally, the position adjustment method further includes: Step 310: When the adjustment distance is greater than the movement threshold, determine the auxiliary heating rate based on the auxiliary heating unit; Step 311: Determine the inertial heat by combining the superposition distance and the auxiliary heating rate, and determine the inertial duration based on the superposition distance; Step 312: Calculate the quotient of the inertial heat and the inertial duration, and define it as the inertial rate; Step 313: Determine the compensation distance based on the inertial rate and auxiliary heating rate; Step 314: Generate a compensation path in response to the compensation distance, adjustment distance, and inertia duration; Step 315: Update the adjustment stroke based on the compensation path.

[0023] By adopting the above technical solution, when the auxiliary heating unit moves, the heat needs to be conducted to the replacement device through the air, which results in a lag in the conduction of heat. Consequently, when the energy of the energy storage device is exhausted, the replacement unit is unable to reach the active temperature. Based on the distance between the auxiliary heating unit and the replacement unit, the situation of insufficient heat due to lag is predicted, and the auxiliary heating unit is controlled to move closer to the replacement unit to compensate for the heat. At the same time, after the compensation is completed, it moves away from the replacement unit to avoid the replacement unit overheating.

[0024] Secondly, this application provides an energy management system suitable for grid-connected energy storage systems, employing the following technical solution: An energy management system suitable for grid-connected energy storage systems includes: The data acquisition module is used to collect energy storage parameters; A memory for storing programs for any of the above-mentioned energy management methods applicable to grid-connected energy storage systems; The processor is the unit of memory that allows programs to be loaded and executed by the processor.

[0025] By adopting the above technical solution, the difference between the energy specifications in the energy storage device and the energy specifications of the grid is compared, thereby predicting the heating status of each energy storage device, identifying and alerting staff to energy storage devices with abnormal temperatures, reducing the occurrence of abnormal temperatures when converting energy specifications, and improving the operational stability of grid-connected energy storage systems.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. By comparing the energy specifications within the energy storage device with those of the power grid, the heat generation of each energy storage device can be predicted. This allows for the identification and alerting of staff to energy storage devices with abnormal temperatures, reducing the occurrence of abnormal temperatures during energy specification conversion and improving the operational stability of grid-connected energy storage systems. 2. Based on the heating behavior of energy storage devices, predict the heat accumulation, thereby predicting the temperature change over time in a grid-connected energy storage system when multiple energy storage devices are heating simultaneously. This helps identify the times when temperatures in different areas of the grid-connected energy storage system are abnormal, improving the accuracy of temperature anomaly identification. 3. Real-time monitoring of the remaining energy in the energy storage device allows for the selection of a replacement unit with the closest energy specification to the power grid when the energy in the storage device is low. This replaces the energy storage device that has run out of power, thereby reducing the occurrence of abnormal temperatures during energy specification conversion. Attached Figure Description

[0027] Figure 1 This is an energy management method applicable to grid-connected energy storage systems; Figure 2 It is a continuous power supply method; Figure 3 It is a position adjustment method. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0029] Reference Figure 1 An energy management method applicable to grid-connected energy storage systems includes: Step 100: Collect energy storage parameters.

[0030] Energy storage parameters refer to information such as output current, input current, energy storage specifications, and remaining energy of each energy storage device in a grid-connected energy storage system. These parameters can be obtained by retrieving readings from the corresponding sensors. The method for collecting these parameters is selected by the staff based on the actual situation and will not be elaborated here.

[0031] Step 101: Determine the power supply unit based on the energy storage parameters.

[0032] A power supply unit refers to the number of an energy storage device in a grid-connected energy storage system that is transmitting power to the grid. The output current can be retrieved from the energy storage parameters, and it can be determined that the energy storage device is transmitting power to the grid when the output current is not zero. The method for determining the power supply unit is selected by the staff based on the actual situation, and will not be elaborated here.

[0033] Step 102: Determine the power supply specifications based on the power supply unit and retrieve the power grid specifications.

[0034] Power supply specifications refer to parameters such as rated voltage and rated current of the power supply unit. The energy storage specifications can be retrieved from the energy storage parameters, and then the power supply specifications can be obtained by analyzing the energy storage specifications. The method for determining the power supply specifications is common knowledge to those in the field and will not be elaborated here.

[0035] Grid specifications refer to parameters such as grid voltage and grid current. The grid refers to the public power grid that the grid-connected energy storage system interacts with. The method for retrieving grid specifications is selected by the staff according to the actual situation, and will not be elaborated here.

[0036] Step 103: Compare the power supply specifications and the power grid specifications to determine the specification ratio, and determine the power supply current based on the power supply unit.

[0037] Specification ratio refers to the ratio between power supply specifications and grid specifications. Specification ratio includes current ratio and voltage ratio. That is, the quotient of grid current and rated current is used as the current ratio, and the quotient of grid voltage and rated voltage is used as the voltage ratio. The method for determining specification ratio is common knowledge in the field and will not be elaborated here.

[0038] The supply current refers to the current value output by the power supply unit to the power grid. The output current can be read from the energy storage parameters as the supply current. The method for determining the supply current is selected by the staff according to the actual situation, and will not be elaborated here.

[0039] Step 104: Determine the heating rate by combining the specification ratio and the power supply current.

[0040] The heating rate refers to the heat emitted by the power supply unit per unit time. The larger the specification ratio and the larger the power supply current, the greater the heating rate. The heating rate corresponding to the specification ratio and power supply current can be found in the rate correspondence table. The rate correspondence table is a data table that records different specification ratios and power supply currents and their corresponding heating rates.

[0041] Step 105: Determine the overheating unit in response to the heating rate.

[0042] An overheating unit refers to a power supply unit with a high heating rate, that is, a power supply unit whose heating rate is greater than the preset overheating threshold. The overheating threshold is selected by the staff according to the actual situation, and will not be elaborated here.

[0043] Step 106: Generate and display a power supply overheating warning based on the overheating unit.

[0044] The power supply overheating warning is used to display information about an energy storage device that is overheating abnormally to staff. The method for generating the power supply overheating warning is common knowledge to those in the field and will not be described in detail here.

[0045] By comparing the energy specifications within the energy storage device with those of the power grid, the heat generation of each energy storage device can be predicted. This allows for the identification and alerting of staff to energy storage devices with abnormal temperatures, reducing the occurrence of temperature anomalies during energy specification conversion and improving the operational stability of grid-connected energy storage systems.

[0046] An energy management method applicable to grid-connected energy storage systems further includes: Step 107: Determine the overheating location based on the overheating unit.

[0047] The overheating location refers to the location information of the overheating unit. The overheating location corresponding to the overheating unit can be found from the energy storage record table. The energy storage record table is a data table that records different energy storage device numbers and their corresponding location information.

[0048] Step 108: Determine the thermal distribution by combining the overheated location and the heating rate.

[0049] Thermal distribution refers to the thermal image of temperature changes over time at various locations in a grid-connected energy storage system. In other words, it is the temperature change of the grid-connected energy storage system after the heat generated by different superheating devices accumulates over time. The method for determining thermal distribution is common knowledge to those in the field and will not be elaborated here.

[0050] Step 109: Determine the high-temperature region and high-temperature time from the thermal distribution.

[0051] High-temperature areas refer to the range of high temperatures in a grid-connected energy storage system. High-temperature moments refer to the moments when the temperature in the grid-connected energy storage system is high. The range of temperatures in the thermal distribution that are higher than a pre-set high-temperature threshold and the corresponding moments can be used as high-temperature areas and high-temperature moments. The high-temperature threshold is selected by the staff based on the actual situation and will not be elaborated here.

[0052] Step 110: Update the power supply overheat warning in response to the high temperature area and high temperature time.

[0053] By predicting the heat accumulation based on the heating status of energy storage devices, the temperature change over time in a grid-connected energy storage system under the simultaneous heating of multiple energy storage devices can be predicted. This allows for the identification of the times when temperature anomalies occur in different areas of the grid-connected energy storage system, thereby improving the accuracy of temperature anomaly identification.

[0054] An energy management method applicable to grid-connected energy storage systems further includes: Step 111: Identify the power supply capacity from the energy storage parameters based on the power supply unit.

[0055] The power supply capacity refers to the remaining power of the power supply unit. This remaining energy can be extracted from the stored parameters. The method for determining the power supply capacity is selected by the staff based on the actual situation and will not be elaborated upon here. Step 112: Calculate the quotient of the power supply quantity and the power supply current, and define it as the power supply duration.

[0056] Power supply duration refers to the maximum duration for which a power supply unit can continuously supply power. The calculation method for power supply duration is common knowledge to those in the field and will not be elaborated here.

[0057] Step 113: When the power supply duration is lower than the preset power shortage threshold, determine the replacement unit from the energy storage parameters based on the grid specifications.

[0058] The power shortage threshold refers to the maximum power supply duration for which an energy storage device has a low power level. This threshold is selected by staff based on actual conditions and will not be elaborated upon here. A power supply duration below the threshold indicates that the power supply unit is about to run out of power. In this case, other energy storage devices need to be selected to replace the power supply unit to reduce power outages. The replacement unit is the energy storage device number whose specifications are closest to the grid specifications. The current and voltage ratios of each energy storage device can be calculated, and the sum of these ratios is used as the replacement coefficient. Finally, the energy storage device with the smallest replacement coefficient is selected as the replacement unit.

[0059] Step 114: In response to the replacement unit generating and displaying a power supply replacement prompt.

[0060] The power supply switchover prompt refers to displaying information about the switchover unit to the staff. The method for generating the power supply switchover prompt is common knowledge to those in the field and will not be elaborated here.

[0061] Real-time monitoring of the remaining energy in the energy storage device allows for the selection of a replacement unit with the closest energy specification to the power grid when the energy in the storage device is low. This replaces the energy storage device that has run out of power, thereby reducing abnormal temperature conditions during energy specification conversion.

[0062] Reference Figure 2 Continuous power supply methods include: Step 200: When the power supply duration is lower than the preset power shortage threshold, determine the replacement type and replacement position based on the replacement unit.

[0063] Replacement type refers to the different types of energy storage devices such as lithium iron phosphate batteries, ternary lithium batteries, sodium-ion batteries, and flow batteries. The replacement type corresponding to the replacement unit can be found in the type correspondence table, which is a data table that records different energy storage device numbers and their corresponding replacement types.

[0064] The replacement location refers to the location information of the replacement unit, which can be found by querying the energy storage record table.

[0065] Step 201: Determine the active temperature based on the succession type.

[0066] The active temperature refers to the optimal operating temperature of the replacement unit. For example, the active temperature of a lithium iron phosphate battery is 27 degrees Celsius, and the active temperature of a ternary lithium battery is 22 degrees Celsius. The active temperature corresponding to the replacement type can be found in the active temperature correspondence table, which is a data table that records different replacement types and their corresponding active temperatures.

[0067] Step 202: Determine the thermal temperature based on the thermal distribution and the location of the succession.

[0068] The thermal temperature is the temperature value at the succession point in the thermal distribution. The highest temperature value at the succession point in all thermal distributions can be selected as the thermal temperature. The method for determining the thermal temperature is common knowledge to those in the field and will not be elaborated here.

[0069] Step 203: Update the replacement unit in response to the active temperature and thermal temperature.

[0070] The power transmission efficiency of the same energy storage device varies at different temperatures. By consulting the structure of the energy storage device, the most suitable active temperature of the energy storage device can be determined. Then, a replacement unit that has reached the active temperature can be selected to replace the energy storage device that has run out of power, thereby improving the stability of the grid-connected energy storage system.

[0071] Continuous power supply methods also include: Step 204: When the power supply duration is lower than the preset power shortage threshold, determine the power shortage time based on the power supply duration.

[0072] The power outage moment refers to the time when the power supply unit runs out of power, that is, the time after the power supply period has elapsed from this point. The method for determining the power outage moment is common knowledge to those in the field and will not be elaborated here.

[0073] Step 205: Determine the power shortage distribution from the thermal distribution based on the power shortage time.

[0074] The power shortage distribution is the thermal distribution at the moment of power shortage. The method for determining the power shortage distribution is common knowledge to those in the field and will not be elaborated here.

[0075] Step 206: Determine the heat distribution based on the power shortage distribution.

[0076] Heat distribution refers to the heat distribution at various locations in a grid-connected energy storage system during a power outage. The method for determining heat distribution is common knowledge in the field and will not be elaborated here.

[0077] Step 207: Determine the replacement heat in response to the heat distribution and replacement location, and determine the thermal conductivity according to the replacement type.

[0078] The heat of succession is the heat value at the position of succession in the heat distribution. The method for determining the heat of succession is common knowledge to those in the field and will not be elaborated here.

[0079] Thermal conductivity is a numerical value used to show how well an energy storage device absorbs heat. For example, the thermal conductivity of a lithium iron phosphate battery is 1 W / (m*℃), and the thermal conductivity of a ternary lithium battery is 0.7 W / (m*℃). The thermal conductivity corresponding to the successor type can be found in the thermal conductivity correspondence table, which is a data table that records different successor types and their corresponding thermal conductivity.

[0080] Step 208: Update the thermal temperature by combining the replacement heat and thermal conductivity.

[0081] The temperature value of the replacement unit can be predicted based on the thermal conductivity. The corresponding thermal temperature can be found in the temperature correspondence table. The temperature correspondence table is a data table that records different replacement heats and thermal conductivity and their corresponding thermal temperatures.

[0082] When the energy in the energy storage device is low, the moment when the energy in the energy storage device is depleted is determined. Then, the heat accumulation at each location is calculated according to the temperature change, and a replacement unit that reaches the active temperature exactly when the energy in the energy storage device is depleted is selected.

[0083] Continuous power supply methods also include: Step 209: Determine the number of replacements based on the replacement units.

[0084] The replacement quantity refers to the number of replacement units. The method for determining the replacement quantity is common knowledge to those in the field and will not be elaborated here.

[0085] Step 210: When the number of replacements is 0, calculate the absolute value of the difference between the thermal temperature and the active temperature, define it as the temperature difference value, and determine the temperature threshold in response to the thermal conductivity.

[0086] A replacement quantity of 0 indicates that there is no replacement unit whose thermal temperature is exactly equal to the active temperature. The temperature difference is a value used to show the temperature difference between replacement units. The calculation method of the temperature difference is common knowledge to those in the art and will not be elaborated here.

[0087] Temperature threshold refers to the temperature value used to determine the heat difference of the replacement unit. The smaller the thermal conductivity, the more heat needs to be provided for the replacement unit to reach the active temperature, and the greater the adjustment distance required for the replacement unit. Therefore, a smaller temperature threshold is used to reduce the situation where the replacement unit moves too far. The temperature threshold corresponding to the thermal conductivity can be found in the threshold correspondence table. The threshold correspondence table is a data table that records different thermal conductivity and their corresponding temperature thresholds.

[0088] Because the heat generated by the power supply unit diffuses faster the closer to the power supply unit, the greater the increase in heat value when closer to the power supply unit than the decrease in heat value when farther away from the power supply unit. In other words, the distance required to adjust the same heat value is larger. Therefore, the temperature threshold here is only set for the case of being farther away, that is, the default thermal temperature is lower than the active temperature.

[0089] Step 211: If the temperature difference is lower than the temperature threshold, determine the required heat by combining the active temperature and thermal conductivity.

[0090] A temperature difference below the temperature threshold indicates that the distance that the replacement unit needs to adjust is relatively small. The required heat is the minimum amount of heat required for the replacement unit to reach the active temperature. The required heat corresponding to the active temperature and thermal conductivity can be found in the required heat table. The required heat table is a data table that records different active temperatures and thermal conductivity and their corresponding required heat.

[0091] Step 212: Identify active locations from the heat distribution based on the required heat.

[0092] An active location is the location in the heat distribution where the heat value is exactly equal to the required heat. When there are multiple active locations, the active location closest to the replacement location is selected. The method for determining active locations is common knowledge to those in the field and will not be elaborated here.

[0093] Step 213: In response to the replacement unit and active location, generate and display a power activity suggestion.

[0094] Power activity recommendations refer to information that displays active locations to staff. The method for determining power activity recommendations is common knowledge in the field and will not be elaborated here.

[0095] If there is no replacement unit that has just reached the active temperature when the energy storage device is depleted, an active location that meets the heat demand in the grid-connected energy storage system, i.e. a location closer to the energy storage device, is found according to the heat shortage of the replacement unit. This allows the staff to be notified in time to adjust the position of the replacement unit so that it reaches the active temperature.

[0096] Reference Figure 3Position adjustment methods include: Step 300: If the temperature difference is lower than the temperature threshold, determine the adjustment distance based on the active position and the successor position, and determine the movement threshold in response to the temperature threshold.

[0097] The adjustment distance refers to the distance between the active position and the successor position. The method for determining the adjustment distance is common knowledge to those in the field and will not be elaborated here.

[0098] The movement threshold is the upper limit of the movement distance limited by the temperature threshold. The method for determining the movement threshold is selected by the staff according to the actual situation, and will not be elaborated here.

[0099] Step 301: When the adjustment distance is greater than the movement threshold, determine the heat source location based on the replacement location and the overheating location.

[0100] The above steps restrict the replacement unit to only move closer to or further away from the power supply unit near the replacement position to adjust the absorbed heat. An adjustment distance greater than the movement threshold indicates that the replacement unit has moved too far, meaning there is no active location near the replacement position that meets the required heat. However, due to the characteristic that heat diffuses outward from the power supply unit and gradually decreases, it is only necessary to move away from the power supply unit by a certain distance to achieve the required heat reduction value, meaning there is no situation where the heat is too high. In summary, an adjustment distance greater than the movement threshold indicates that the heat is too low, meaning that the heat emitted by the power supply unit is insufficient.

[0101] The heat source location refers to the overheated location closest to the replacement location, that is, the location information of the power supply unit that mainly provides heat to the replacement unit. The method for determining the heat source location is common knowledge to those skilled in the art and will not be elaborated here.

[0102] Step 302: Determine the heat source heat from the heat distribution based on the heat source location, and determine the heat source path according to the heat source location and the successor location.

[0103] Heat source heat refers to the cumulative heat value at the location of the heat source in the heat distribution. The method for determining heat source heat is common knowledge among those in the field and will not be elaborated here.

[0104] The regulating device refers to the equipment used to adjust the position of the energy storage device. A two-dimensional linear guide rail set at the bottom of the energy storage device can be used as the regulating device. The regulating device is selected by the staff according to the actual situation, and will not be described in detail here.

[0105] The heat source path refers to the route by which the replacement unit is moved from the replacement position to the heat source position through the adjustment device. The method for determining the heat source path is common knowledge to those skilled in the art and will not be elaborated here.

[0106] Step 303: Determine the superimposed heat based on the required heat and the heat source heat, and control the preset adjustment device to move the replacement unit according to the heat source path.

[0107] Superimposed heat refers to the amount of heat missing at the location of the heat source, that is, the difference between the required heat and the heat source is calculated as superimposed heat.

[0108] Step 304: In response to the superimposed heat generation, display a unit active suggestion.

[0109] Unit activity recommendations refer to information used to display superimposed heat to staff. The method for generating unit activity recommendations is common knowledge in the field and will not be elaborated here.

[0110] When the energy storage device is not generating enough heat, it may be difficult for the replacement location to reach the active temperature. In this case, the heat deficiency should be judged according to the heat generation of the energy storage device, and the staff should be notified in time to improve the stability of the grid-connected energy storage system.

[0111] Position adjustment methods also include: Step 305: When the adjustment distance is greater than the movement threshold, determine the auxiliary heating position based on the heat source position.

[0112] The auxiliary heating location refers to the superheated location closest to the heat source. The method for determining the auxiliary heating location is common knowledge to those in the field and will not be elaborated here.

[0113] Step 306: Generate an auxiliary heat distribution based on the auxiliary heat location and the power deficiency distribution, and identify the superposition distance from the auxiliary heat distribution based on the superimposed heat.

[0114] Auxiliary heat distribution refers to the spatial distribution of heat generated by the power supply unit at the auxiliary heat location during a power outage. The method for determining the auxiliary heat distribution is common knowledge to those in the field and will not be elaborated here.

[0115] The superposition distance refers to the distance between the location in the auxiliary heat distribution where the heat value is equal to the superposition heat value and the auxiliary heat location. The method for determining the superposition distance is common knowledge to those in the field and will not be elaborated here.

[0116] Step 307: Determine the adjustment distance by combining the superposition distance, auxiliary heating position and heat source position, and determine the auxiliary heating unit according to the auxiliary heating position.

[0117] The adjustment distance is the distance that needs to be moved to bring the auxiliary heating unit closer to the power supply unit, i.e., the distance the auxiliary heating unit moves closer to the power supply unit. The method for determining the adjustment distance is common knowledge to those skilled in the art and will not be elaborated here. The auxiliary heating unit is the energy storage device number of the power supply unit at the auxiliary heating location, which can be found in the energy storage record table.

[0118] Step 308: In response to the adjustment distance and the auxiliary heating unit, an adjustment stroke is generated.

[0119] The adjustment stroke refers to the route by which the auxiliary heating unit moves closer to the power supply unit. The method for determining the adjustment stroke is common knowledge to those skilled in the art and will not be elaborated here.

[0120] Step 309: Control the preset adjustment device to adjust the position of the auxiliary heating unit according to the adjustment stroke.

[0121] When the energy storage device is not generating enough heat, locate the other auxiliary heating unit that is currently supplying power closest to the energy storage device, select the overlap distance between the auxiliary heating unit and the energy storage device according to the heat shortage, and move the auxiliary heating unit according to the overlap distance to heat the replacement unit.

[0122] Position adjustment methods also include: Step 310: When the adjustment distance is greater than the movement threshold, determine the auxiliary heating rate based on the auxiliary heating unit.

[0123] The auxiliary heating rate refers to the heating rate of the auxiliary heating unit. The auxiliary heating rate can be retrieved from step 104 above. The method for retrieving the auxiliary heating rate is selected by the staff according to the actual situation, and will not be elaborated here.

[0124] Step 311: Determine the inertial heat by combining the superposition distance and the auxiliary heating rate, and determine the inertial duration based on the superposition distance.

[0125] Inertial heat refers to the heat loss due to thermal inertia. When the auxiliary heating unit moves according to the adjustment stroke, there is a delay in the transfer of heat from the auxiliary heating unit to the replacement unit. As a result, the heat received by the replacement unit is lower than the required heat when there is a power outage. Inertial heat is the heat loss of the replacement unit when there is a power outage. The greater the stacking distance and the greater the auxiliary heating rate, the greater the inertial heat. The inertial heat corresponding to the stacking distance and auxiliary heating rate can be found in the inertial correspondence table. The inertial correspondence table is a data table that records different stacking distances and auxiliary heating rates and their corresponding inertial heat.

[0126] Inertia time refers to the delay time for heat to be transferred from the auxiliary heating unit to the replacement unit. The greater the superposition distance, the greater the delay time. The delay time corresponding to the superposition distance can be found in the delay correspondence table, which is a data table that records different superposition distances and their corresponding delay times.

[0127] Step 312: Calculate the quotient of the inertial heat and the inertial duration, and define it as the inertial rate.

[0128] Inertial speed refers to the amount of heat that needs to be compensated per unit time. The method for determining inertial speed is common knowledge to those in the field and will not be elaborated here.

[0129] Step 313: Determine the compensation distance based on the inertial rate and auxiliary heating rate.

[0130] The compensation distance refers to the distance between the auxiliary heating unit and the replacement unit when compensating for inertial heat. The heat value absorbed by each unit around the auxiliary heating unit per unit time can be determined according to the auxiliary heating rate. Then, the distance required to approach the replacement unit to increase the inertial rate of heat at the superposition distance is used as the compensation distance.

[0131] Step 314: Generate a compensation path in response to the compensation distance, adjustment distance, and inertia duration.

[0132] The compensation path is the route taken by controlling the auxiliary heating unit to move towards the replacement unit by the sum of the compensation distance and the adjustment distance, and then moving away from the replacement unit by the compensation distance after the inertial time. The method for determining the compensation path is common knowledge to those skilled in the art and will not be elaborated here.

[0133] Step 315: Update the adjustment stroke based on the compensation path.

[0134] When the auxiliary heating unit moves, the heat needs to be conducted to the replacement device through the air, which causes a lag in the heat conduction. As a result, when the energy storage device is depleted, the replacement unit has difficulty reaching the active temperature. Based on the distance between the auxiliary heating unit and the replacement unit, the situation of insufficient heat due to lag is predicted, and the auxiliary heating unit is controlled to move closer to the replacement unit to compensate for the heat. At the same time, after the compensation is completed, it moves away from the replacement unit to avoid the replacement unit overheating.

[0135] Based on the same inventive concept, embodiments of the present invention provide an energy management system suitable for grid-connected energy storage systems, comprising: The data acquisition module is used to collect energy storage parameters; A memory for storing programs for any of the above-mentioned energy management methods applicable to grid-connected energy storage systems; The processor is the unit of memory that allows programs to be loaded and executed by the processor.

[0136] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. An energy management method applicable to grid-connected energy storage systems, characterized in that, include: Step 100: Collect energy storage parameters; Step 101: Determine the power supply unit based on the energy storage parameters; Step 102: Determine the power supply specifications based on the power supply unit and retrieve the power grid specifications; Step 103: Compare the power supply specifications and the power grid specifications to determine the specification ratio, and determine the power supply current based on the power supply unit; Step 104: Determine the heating rate by combining the specified multiplier and the power supply current; Step 105: Determine the overheating unit in response to the heating rate; Step 106: Generate and display a power supply overheating warning based on the overheating unit.

2. The energy management method for grid-connected energy storage systems according to claim 1, characterized in that, Also includes: Step 107: Determine the overheating location based on the overheating unit; Step 108: Determine the heat distribution based on the overheated location and heating rate; Step 109: Determine the high-temperature region and high-temperature moment from the thermal distribution; Step 110: Update the power supply overheat warning in response to the high temperature area and high temperature time.

3. The energy management method for grid-connected energy storage systems according to claim 2, characterized in that, Also includes: Step 111: Identify the power supply capacity from the energy storage parameters based on the power supply unit; Step 112: Calculate the quotient of the power supply and the power supply current, and define it as the power supply duration; Step 113: When the power supply duration is lower than the preset power shortage threshold, determine the replacement unit from the energy storage parameters based on the grid specifications; Step 114: In response to the replacement unit generating and displaying a power supply replacement prompt.

4. The energy management method applicable to grid-connected energy storage systems according to claim 3, characterized in that, It also includes a continuous power supply method, which includes: Step 200: When the power supply duration is lower than the preset power shortage threshold, determine the replacement type and replacement location based on the replacement unit; Step 201: Determine the active temperature based on the succession type; Step 202: Determine the thermal temperature based on the described thermal distribution and the location of the transition; Step 203: Update the replacement unit in response to the active temperature and thermal temperature.

5. The energy management method for grid-connected energy storage systems according to claim 4, characterized in that, The continuous power supply method further includes: Step 204: When the power supply duration is lower than the preset power shortage threshold, determine the power shortage time based on the power supply duration; Step 205: Determine the power shortage distribution from the thermal distribution based on the power shortage time; Step 206: Determine the heat distribution based on the described power shortage distribution; Step 207: Determine the replacement heat in response to the heat distribution and replacement location, and determine the thermal conductivity according to the replacement type; Step 208: Update the thermal temperature by combining the replacement heat and thermal conductivity.

6. The energy management method for grid-connected energy storage systems according to claim 5, characterized in that, The continuous power supply method further includes: Step 209: Determine the number of replacements based on the replacement units; Step 210: When the number of replacements is 0, calculate the absolute value of the difference between the thermal temperature and the active temperature, define it as the temperature difference value, and determine the temperature threshold in response to the thermal conductivity. Step 211: If the temperature difference is lower than the temperature threshold, determine the required heat by combining the active temperature and thermal conductivity; Step 212: Identify active locations from the heat distribution based on the required heat; Step 213: In response to the replacement unit and active location, generate and display a power activity suggestion.

7. The energy management method for grid-connected energy storage systems according to claim 6, characterized in that, It also includes a position adjustment method, the position adjustment method comprising: Step 300: If the temperature difference is lower than the temperature threshold, determine the adjustment distance based on the active position and the successor position, and determine the movement threshold in response to the temperature threshold; Step 301: When the adjustment distance is greater than the movement threshold, determine the heat source location based on the replacement location and the overheating location; Step 302: Determine the heat source heat from the heat distribution based on the heat source location, and determine the heat source path according to the heat source location and the successor location; Step 303: Determine the superimposed heat based on the required heat and the heat source heat, and control the preset adjustment device to move the replacement unit according to the heat source path; Step 304: In response to the superimposed heat generation, display a unit active suggestion.

8. The energy management method for grid-connected energy storage systems according to claim 7, characterized in that, The position adjustment method further includes: Step 305: When the adjustment distance is greater than the movement threshold, determine the auxiliary heating position based on the heat source position; Step 306: Generate an auxiliary heat distribution based on the auxiliary heat location and the power deficiency distribution, and identify the superposition distance from the auxiliary heat distribution based on the superimposed heat. Step 307: Determine the adjustment distance by combining the superposition distance, auxiliary heating position and heat source position, and determine the auxiliary heating unit according to the auxiliary heating position; Step 308: In response to the adjustment distance and the auxiliary heating unit, an adjustment stroke is generated; Step 309: Control the preset adjustment device to adjust the position of the auxiliary heating unit according to the adjustment stroke.

9. An energy management method applicable to grid-connected energy storage systems according to claim 8, characterized in that, The position adjustment method further includes: Step 310: When the adjustment distance is greater than the movement threshold, determine the auxiliary heating rate based on the auxiliary heating unit; Step 311: Determine the inertial heat by combining the superposition distance and the auxiliary heating rate, and determine the inertial duration based on the superposition distance; Step 312: Calculate the quotient of the inertial heat and the inertial duration, and define it as the inertial rate; Step 313: Determine the compensation distance based on the inertial rate and auxiliary heating rate; Step 314: Generate a compensation path in response to the compensation distance, adjustment distance, and inertia duration; Step 315: Update the adjustment stroke based on the compensation path.

10. An energy management system suitable for grid-connected energy storage systems, characterized in that, include: The data acquisition module is used to collect energy storage parameters; A memory for storing a program of an energy management method applicable to a grid-connected energy storage system as described in any one of claims 1 to 9; The processor is the unit of memory that allows programs to be loaded and executed by the processor.

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