Power Regulation Method and System of Gravity Energy Storage System Based on Load Response

Abstract

The present invention relates to the technical field of power regulation of gravity energy storage systems. A power regulation method and system for a gravity energy storage system based on load response includes: obtaining the peak load period, load demand power, and peak demand power consumption of the regional power grid, dividing the gravity energy storage period and the gravity energy release period. During the gravity energy storage period, calculating the future load power consumption and future energy storage power consumption, and determining whether the future energy storage power consumption is greater than the future load power consumption. If it is greater, then taking the current energy storage power as the target energy storage power. If it is not greater, then performing power regulation to obtain the target energy storage power. During the gravity energy release period, constructing a falling constraint condition and an interval constraint condition based on the peak load period and the load demand power, and performing power regulation on the gravity energy storage system based on the target energy storage power, the falling constraint condition, and the interval constraint condition. The present invention can accelerate the response time of power regulation of the gravity energy storage system and reduce energy waste during the energy supply process.

Description

Technical Field

[0001] The present invention relates to the technical field of power regulation of gravity energy storage systems, and particularly to a method, system, electronic device and computer-readable storage medium for power regulation of a gravity energy storage system based on load response. Background Art

[0002] Gravity energy storage systems play an important role in helping regional power grids cope with load fluctuations. They can store electricity when there is excess power in the regional power grid to prevent excessive waste of excess power, and release electricity during peak load demand to supply energy to the regional power grid. Although gravity energy storage systems can store a large amount of energy, due to their low energy conversion efficiency, it is of great significance to accurately regulate the power of gravity energy storage systems in actual applications.

[0003] Currently, the power regulation of gravity energy storage systems is mainly achieved by changing the running speed of the energy storage heavy objects, so as to regulate the power of the gravity energy storage system. Since the gravity energy storage system is relatively large in size, it takes a long time to change the running speed, resulting in a slow response time to the regional power grid, and only changing the speed during the process of supplying energy to the regional power grid will cause a large amount of energy waste. Summary of the Invention

[0004] The present invention provides a method and a computer-readable storage medium for power regulation of a gravity energy storage system based on load response, and its main purpose is to accelerate the response time of power regulation of the gravity energy storage system and reduce energy waste during the energy supply process.

[0005] To achieve the above object, a method for power regulation of a gravity energy storage system based on load response provided by the present invention includes:

[0006] Obtain the peak load period and load demand power of the regional power grid, and calculate the peak demand power consumption based on the peak load period and load demand power;

[0007] According to the peak load period, divide the working stages of the pre-constructed gravity energy storage system to obtain a gravity energy storage period and a gravity energy release period. Among them, the gravity energy storage system includes a plurality of gravity energy storage units, and each gravity energy storage unit includes: an energy storage heavy object, a transmission bottom bin, a transmission top bin and a transmission belt;

[0008] During the gravity energy storage period, obtain the current energy storage power, current energy storage power and current gravity load of the gravity energy storage system, and calculate the future load power consumption based on the peak demand power consumption and the current energy storage power;

[0009] According to the peak load period and the current energy storage power, calculate the future energy storage power of the gravity energy storage system, and determine whether the future energy storage power is greater than the future load power consumption;

[0010] If the future energy storage power is greater than the future load power, then use the current energy storage power as the target energy storage power until entering the gravity energy release period;

[0011] If the future energy storage power is not greater than the future load power, then perform power regulation on the gravity energy storage system by changing the current gravity load to obtain the target energy storage power, and maintain the target energy storage power until entering the gravity energy release period;

[0012] During the gravity energy release period, obtain the bottom bin height of the transfer bottom bin and the top bin height of the transfer top bin, and calculate the falling time of the heavy object based on the bottom bin height and the top bin height;

[0013] Construct the falling constraint condition of the nth falling time according to the falling time of the heavy object and the preset first falling time, and construct the interval constraint condition of the falling interval according to the load demand power and the first falling time;

[0014] Based on the first falling time, the falling constraint condition and the interval constraint condition, set the falling time set, and perform power regulation on the gravity energy storage system according to the falling time set, the target energy storage power and the current energy storage power.

[0015] Optionally, the calculating the peak demand power according to the load peak period and the load demand power includes:

[0016] Obtain the load peak duration of the load peak period, where the load peak period is expressed as:

[0017] T f =(T k T j )

[0018] where T f represents the load peak period, T k represents the peak start time, and T j represents the peak end time;

[0019] Calculate the peak demand power using the following formula:

[0020] W f =(T j -T k )×P f

[0021] where W f represents the peak demand power, and P f represents the load demand power.

[0022] Optionally, the dividing the pre-constructed gravity energy storage system into working stages according to the load peak period to obtain the gravity energy storage period and the gravity energy release period includes:

[0023] Obtain the current moment and set a duration for energy release preparation based on the load demand power;

[0024] According to the peak start moment and the duration for energy release preparation in the peak load period, determine the actual start moment, where the actual start moment is expressed as:

[0025] T a = T k - t z

[0026] where T a represents the actual start moment and t z represents the duration for energy release preparation;

[0027] Determine the gravity energy storage period according to the current moment and the actual start moment, and determine the gravity energy release period according to the actual start moment and the peak end moment, where the gravity energy storage period and the gravity energy release stage are respectively expressed as:

[0028] T c =(T n T a ), T s =(T a T j )

[0029] where T n represents the current moment, T c represents the gravity energy storage period, and T s represents the gravity energy release period.

[0030] Optionally, the power regulation of the gravity energy storage system by changing the current gravity load includes:

[0031] Obtain the current unit load set, the heavy object contact area set, and the unit rated speed set of multiple gravity energy storage units, where the current unit load set, the heavy object contact area set, and the unit rated speed set are respectively expressed as:

[0032] G0 = {G 01 , …, G 0n}

[0033] S = {S1, …, S n}

[0034] v = {v1, …, v n}

[0035] where G0 represents the current unit load set, G 01 represents the current unit load of the first gravity energy storage unit, and G 0nRepresents the current unit load of the nth gravity energy storage unit, S represents the set of heavy object contact areas, S1 represents the heavy object contact area of the first gravity energy storage unit, S n Represents the heavy object contact area of the nth gravity energy storage unit, v represents the set of unit rated speeds, v1 represents the unit rated speed of the first gravity energy storage unit, v n Represents the unit rated speed of the nth gravity energy storage unit, n represents the number of gravity energy storage units;

[0036] Increase the current unit load according to the preset number of ascending heavy objects to obtain a set of target unit loads, where the set of target unit loads is expressed as:

[0037] G = {G1,..., G n}

[0038] G1 = G 01 +k s ×m×g,..., G n = G 0n +k s ×m×g

[0039] Among them, G represents the set of target unit loads, G1 represents the target unit load of the first gravity energy storage unit, G n Represents the target unit load of the nth gravity energy storage unit, k s Represents the number of ascending heavy objects, m represents the mass of the heavy object for energy storage, g represents the acceleration due to gravity;

[0040] According to the set of target unit loads, the set of heavy object contact areas and the set of unit rated speeds, use the following formula to calculate the target energy storage power:

[0041]

[0042] Among them, P m Represents the target energy storage power, μ represents the preset efficiency coefficient, δ represents the preset friction loss, i represents the serial number of the gravity energy storage unit, ρ represents the preset air density, C represents the preset drag coefficient, G i Represents the target unit load of the ith gravity energy storage unit, v i Represents the unit rated speed of the ith gravity energy storage unit, S i Represents the heavy object contact area of the ith gravity energy storage unit.

[0043] Optionally, calculating the falling time of the heavy object based on the bottom bin height and the top bin height includes:

[0044] According to the bottom bin height and the top bin height, use the following formula to calculate the falling height:

[0045] h x= h g -h d

[0046] Wherein, h x represents the falling height, h g represents the top bin height, h d represents the bottom bin height;

[0047] Based on the falling height, the falling time of the heavy object is calculated using the following formula:

[0048]

[0049] Wherein, t0 represents the falling time of the heavy object, and g represents the preset acceleration due to gravity.

[0050] Optionally, constructing the falling constraint condition of the nth falling time according to the falling time of the heavy object and the preset first falling time includes:

[0051] Taking the energy release preparation time as the first falling time, and constructing the following falling constraint condition of the nth falling time based on the first falling time and the falling time of the heavy object:

[0052] t n > t1 - t0

[0053] Wherein, t n represents the nth falling time, t1 represents the first falling time, and t0 represents the falling time of the heavy object.

[0054] Optionally, constructing the interval constraint condition of the falling interval according to the load demand power and the first falling time includes:

[0055] Constructing the following interval constraint condition of the falling interval according to the load demand power and the first falling time:

[0056] And:

[0057] Wherein, Δt represents the falling interval, n represents the number of gravity energy storage units, P f represents the load demand power, g represents the acceleration due to gravity, and m represents the mass of the energy storage heavy object.

[0058] Optionally, setting the falling time set based on the first falling time, the falling constraint condition and the interval constraint condition includes:

[0059] Setting the falling interval according to the interval constraint condition, and calculating the falling time set of the gravity energy storage system according to the first falling time, the falling interval and the falling constraint condition. The falling time table set is expressed as:

[0060] t = {t1, t2, …, t n}

[0061] t n = t n-1 - Δt

[0062] where t2 represents the second falling duration, t n represents the nth falling duration, and t n-1 represents the (n - 1)th falling duration.

[0063] Optionally, the power regulation of the gravity energy storage system according to the falling duration set, the target energy storage power, and the current energy storage power includes:

[0064] Calculating the gravity energy release power of the gravity energy storage system using the following formula:

[0065] P s = m × g 2 × [t1 - (n - 1) × Δt], and:

[0066] where P s represents the gravity energy release power, W0 represents the current energy storage power, and P m represents the target energy storage power;

[0067] Determining whether the load demand power is greater than the gravity energy release power:

[0068] If the load demand power is greater than the gravity energy release power, then by adding the energy storage heavy objects with a preset number of falling heavy objects in the gravity energy storage system, the regulated energy storage heavy objects are obtained;

[0069] Performing power regulation on the gravity energy release power according to the regulated energy storage heavy objects to obtain the target energy release power, and the target energy release power is expressed as:

[0070] P l = m × g 2 × [t1 - (n - 1) × Δt] + k x × m × g × h k

[0071] and:

[0072]

[0073] where P l represents the target energy release power, k x represents the number of falling heavy objects, and h k represents the height of the increased falling energy storage heavy objects;

[0074] Take the target energy release power as the gravity energy release power, and return the step of judging whether the load demand power is greater than the gravity energy release power;

[0075] If the load demand power is not greater than the gravity energy release power, maintain the gravity energy storage power until the end of the gravity energy release period, and complete the power regulation of the gravity energy storage system.

[0076] To achieve the above object, the present invention also provides a power regulation system for a gravity energy storage system based on load response, including:

[0077] A grid load acquisition module, configured to acquire the peak load period and the load demand power of the regional power grid, calculate the peak demand power consumption based on the peak load period and the load demand power, divide the working stages of the pre-constructed gravity energy storage system according to the peak load period, and obtain the gravity energy storage period and the gravity energy release period. Among them, the gravity energy storage system includes a plurality of gravity energy storage units, and each gravity energy storage unit includes: a storage heavy object, a transfer bottom bin, a transfer top bin, and a transfer belt;

[0078] An energy storage power calculation module, configured to, during the gravity energy storage period, acquire the current energy storage power, the current energy storage power, and the current gravity load of the gravity energy storage system, calculate the future load power consumption according to the peak demand power consumption and the current energy storage power, and calculate the future energy storage power of the gravity energy storage system according to the peak load period and the current energy storage power;

[0079] An energy storage power regulation module, configured to judge whether the future energy storage power is greater than the future load power consumption. If the future energy storage power is greater than the future load power consumption, take the current energy storage power as the target energy storage power until entering the gravity energy release period. If the future energy storage power is not greater than the future load power consumption, perform power regulation on the gravity energy storage system by changing the current gravity load to obtain the target energy storage power, and maintain the target energy storage power until entering the gravity energy release period;

[0080] An energy release power regulation module, configured to, during the gravity energy release period, acquire the bottom bin height of the transfer bottom bin and the top bin height of the transfer top bin, calculate the falling time of the heavy object based on the bottom bin height and the top bin height, construct a falling constraint condition for the nth falling time according to the falling time of the heavy object and the preset first falling time, construct an interval constraint condition for the falling interval according to the load demand power and the first falling time, set a falling time set based on the first falling time, the falling constraint condition, and the interval constraint condition, and perform power regulation on the gravity energy storage system according to the falling time set, the target energy storage power, and the current energy storage power.

[0081] To solve the above problems, the present invention also provides an electronic device, and the electronic device includes:

[0082] A memory that stores at least one instruction; and

[0083] A processor that executes the instructions stored in the memory to implement the above-mentioned power regulation method for a load-response-based gravity energy storage system.

[0084] To solve the above problems, the present invention also provides a computer-readable storage medium that stores at least one instruction, and the at least one instruction is executed by a processor in an electronic device to implement the above-mentioned power regulation method for a load-response-based gravity energy storage system.

[0085] To solve the problems described in the background art, the present invention obtains the peak load period and the load demand power of the regional power grid, calculates the peak demand power consumption based on the peak load period and the load demand power, realizes the accurate acquisition of the load situation of the regional power grid, and provides a prerequisite and a regulation basis for subsequent power regulation. According to the peak load period, the working stages of the gravity energy storage system are divided to obtain the gravity energy storage period and the gravity energy release period, which clarifies the working mode of the gravity energy storage system and enables the gravity energy storage system to respond to the regional power grid faster according to the working stages. During the gravity energy storage period, the current energy storage power, the current energy storage power, and the current gravity load of the gravity energy storage system are obtained, and the future load power consumption is calculated based on the peak demand power consumption and the current energy storage power. This provides conditions for subsequent power regulation and clarifies the target of power regulation. Next, according to the peak load period and the current energy storage power, the future energy storage power of the gravity energy storage system is calculated, providing conditions for the subsequent judgment process. By judging whether the future energy storage power is greater than the future load power consumption, the gravity energy storage system can filter out situations where power regulation is not required, which speeds up the process of power regulation and the response time of the gravity energy storage system. If the future energy storage power is greater than the future load power consumption, by taking the current energy storage power as the target energy storage power until entering the gravity energy release period, the process of power regulation is further accelerated. If the future energy storage power is not greater than the future load power consumption, power regulation of the gravity energy storage system is carried out by changing the current gravity load to obtain the target energy storage power and maintaining the target energy storage power until entering the gravity energy release period. This step highly correlates the load response of the regional power grid with the energy storage power of the gravity energy storage system, enabling the power regulation of the gravity energy storage system to always meet the load demand of the regional power grid and further accelerating the response time of the gravity energy storage system. During the gravity energy release period, by constructing the falling constraint conditions of the nth falling duration based on the falling duration of the heavy object and the first falling duration, and constructing the interval constraint conditions of the falling interval based on the load demand power and the first falling duration, this step solves the situation where the gravity energy release power of the gravity energy storage system cannot meet the load demand power during the gravity energy release period by advancing the falling of the energy storage heavy object, accelerating the response time of the gravity energy storage system. Finally, based on the first falling duration, the falling constraint conditions, and the interval constraint conditions, a set of falling durations is set, and power regulation of the gravity energy storage system is carried out according to the set of falling durations, the target energy storage power, and the current energy storage power. This step releases multiple energy storage heavy objects one by one, enabling the gravity energy release power during the entire gravity energy release period to be well controlled, thereby preventing a large amount of energy waste caused by the disorderly falling of the energy storage heavy objects. Therefore, the present invention can accelerate the response time of the power regulation of the gravity energy storage system and reduce the energy waste during the energy supply process. Description of the Drawings

[0086] Figure 1Schematic flowchart of the power regulation method for a gravity energy storage system based on load response provided by an embodiment of the present invention;

[0087] Figure 2 Functional module diagram of the power regulation system for a gravity energy storage system based on load response provided by an embodiment of the present invention;

[0088] Figure 3 Schematic structural diagram of an electronic device for implementing the power regulation method for a gravity energy storage system based on load response provided by an embodiment of the present invention.

[0089] The realization, functional characteristics, and advantages of the present invention will be further described in conjunction with embodiments with reference to the accompanying drawings. Detailed implementation manners

[0090] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0091] The embodiments of the present application provide a power regulation method for a gravity energy storage system based on load response. The execution subject of the power regulation method for a gravity energy storage system based on load response includes, but is not limited to, at least one of an electronic device such as a server, a terminal, etc. that can be configured to execute the method provided by the embodiments of the present application. In other words, the power regulation method for a gravity energy storage system based on load response can be executed by software or hardware installed on a terminal device or a server device, and the software can be a blockchain platform. The server includes, but is not limited to: a single server, a server cluster, a cloud server, or a cloud server cluster, etc.

[0092] Refer to Figure 1 As shown, it is a schematic flowchart of the power regulation method for a gravity energy storage system based on load response provided by an embodiment of the present invention. In this embodiment, the power regulation method for a gravity energy storage system based on load response includes:

[0093] S1. Obtain the peak load period and the load demand power of the regional power grid, and calculate the peak demand electricity based on the peak load period and the load demand power.

[0094] It should be explained that the regional power grid refers to a power grid system that supplies power to power grid users in a specific area. The regional power grid has the function of supplying power to power grid users. At the same time, the regional power grid can monitor the power consumption of power grid users in real time, and can predict the power consumption of power grid users in the next stage based on the long-term power consumption situation, so as to regulate the power consumption of power grid users when the power supply is insufficient and send an energy release signal to the gravity energy storage system of the regional power grid in advance, for example: restricting the power consumption of manufacturing units with more power consumption, sending an energy release signal to the gravity energy storage system, etc.

[0095] It is understandable that the peak load period refers to the period of peak electricity consumption of grid users predicted by the regional power grid. The load demand power refers to the power supply that the gravity energy storage system needs to provide to the regional power grid during the peak load period.

[0096] Specifically, when the regional power grid predicts the peak load period, it will predict the total load demand power required during this peak load period based on past electricity consumption conditions. When the power generation systems in each region of the regional power grid cannot meet this total load demand power, the regional power grid will obtain different power demand powers from the power energy storage systems in the region in order to meet the total load demand power required during the peak load period. Among them, the load demand power is the power that the gravity energy storage system will supply to the regional power grid during the peak period. The regional power generation systems include: a thermal power generation system and a new energy power generation system. The peak demand electricity refers to the total electricity supplied by the gravity energy storage system to the regional power grid during the entire peak load period.

[0097] Specifically, calculating the peak demand electricity based on the peak load period and the load demand power includes:

[0098] Obtain the peak load duration of the peak load period, where the peak load period is expressed as:

[0099] T f =(T k T j )

[0100] where T f represents the peak load period, T k represents the start time of the peak, and T j represents the end time of the peak;

[0101] Calculate the peak demand electricity using the following formula:

[0102] W f =(T j -T k )×P f

[0103] where W f represents the peak demand electricity, and P f represents the load demand power.

[0104] S2. Divide the pre-constructed gravity energy storage system into working stages according to the peak load period to obtain the gravity energy storage period and the gravity energy release period. The gravity energy storage system includes a plurality of gravity energy storage units, and each gravity energy storage unit includes: a storage heavy object, a transfer bottom bin, a transfer top bin, and a transfer cable belt.

[0105] It is understandable that the gravity energy storage system refers to the conversion of gravitational potential energy and electrical energy by using the gravitational load of heavy objects to realize the power supply of the regional power grid. The gravity energy storage period refers to the period when the gravity energy storage system stores the surplus power of the regional power grid. Among them, the surplus power refers to the power remaining after the grid output power of the regional power grid meets the electricity demand of grid users. The gravity energy release period refers to the period when the gravity energy storage system releases the accumulated gravitational potential energy and supplies power to the regional power grid. The gravity energy storage unit refers to an energy storage system that works independently in the gravity energy storage system. Among them, each gravity energy storage unit includes: a storage heavy object, a transfer bottom bin, a transfer top bin, and a transfer belt. Among them, the masses of the storage heavy objects of different gravity energy storage units are the same, but the number of storage heavy objects carried by different gravity energy storage units may be different. The heights of the transfer bottom bins and transfer top bins of different gravity energy storage units are the same, and the materials of the transfer belts are the same.

[0106] It should be explained that when the gravity energy storage unit is in the gravity energy storage period, the storage heavy object will be transported from the transfer bottom bin to the transfer top bin by the transfer belt. During this process, the surplus power of the regional power grid provides the energy required for the storage heavy object to rise. When the storage heavy object is transported to the transfer top bin, the gravitational energy release of the storage heavy object is the power stored by the gravity energy storage unit. The power storage process of this gravity energy storage unit should be repeated, that is, when one storage heavy object is transported to the transfer top bin, the gravity energy storage unit will let another storage heavy object continue to rise. Among them, the total power stored by all gravity energy storage units is the power stored by the gravity energy storage system.

[0107] Specifically, the working stage of the pre-constructed gravity energy storage system is divided according to the peak load period to obtain the gravity energy storage period and the gravity energy release period, including:

[0108] Obtain the current time and set an energy release preparation duration based on the load demand power;

[0109] According to the peak start time and the energy release preparation duration of the peak load period, determine the actual start time, where the actual start time is expressed as:

[0110] T a = T k - t z

[0111] Among them, T a represents the actual start time, and t z represents the energy release preparation duration;

[0112] Determine the gravity energy storage period according to the current time and the actual start time, and determine the gravity energy release period according to the actual start time and the peak end time. Among them, the gravity energy storage period and the gravity energy release stage are respectively expressed as:

[0113] T c = (T n T a ), T s = (T a T j )

[0114] Among them, T n represents the current moment, T c represents the gravity energy storage period, and T s represents the gravity energy release period.

[0115] It should be explained that the energy release preparation duration refers to the preparation duration of the gravity energy storage system before energy release, and this energy release preparation duration is judged manually.

[0116] Exemplarily, for a certain gravity energy storage system, the peak load period of a certain receiving area power grid is: (9:00 - 15:00), the current moment is 2:00, and the energy release preparation duration set manually is 20 minutes. Then the actual start moment of the peak load moment is 20 minutes ahead of 9:00 am, which is 8:40. The gravity energy storage period is (2:00 - 8:40), and the gravity energy release period is (8:40 - 15:00).

[0117] S3. During the gravity energy storage period, obtain the current stored energy, current storage power, and current gravity load of the gravity energy storage system. Calculate the future load power according to the peak demand power and the current stored energy, and calculate the future stored energy of the gravity energy storage system according to the peak load period and the current storage power.

[0118] It can be understood that the current stored energy refers to the total amount of energy that the gravity energy storage system has stored at the current moment. The current storage power refers to the power of the gravity energy storage system for energy storage at the current moment, and this current storage power is the sum of the lifting powers of each gravity energy storage unit to lift the energy storage heavy object.

[0119] It can be understood that the current gravity load refers to the total weight of the energy storage heavy objects lifted by each gravity energy storage system. The future load power refers to the total amount of energy that the gravity energy storage system needs to store during the gravity energy storage period, and this future load power is the difference between the peak demand power and the current stored energy. The future stored energy refers to the total amount of energy that the gravity energy storage system can store at the end of the gravity energy storage period if it continues to store energy according to the current storage power.

[0120] Exemplarily, the current stored energy of a certain gravity energy storage system is 50,000 kWh, and the peak demand power is 80,000 kWh. This indicates that the regional power grid requires the gravity energy storage system to supply more than 80,000 kWh of electricity during the peak load period. At this time, the gravity energy storage system only has 50,000 kWh of electricity. Therefore, the gravity energy storage system also needs to store at least 30,000 kWh of electricity during the gravity energy storage period to meet the demand of the regional power grid during the peak load period, that is, the future load power is 30,000 kWh.

[0121] S4. Determine whether the future stored energy is greater than the future load power.

[0122] It should be explained that when the gravity energy storage system obtains the peak load period and the load demand power given by the regional power grid, it will evaluate whether it can supply electricity to the regional power grid at the load demand power during the peak load period. The evaluation is to determine whether the future stored energy is greater than the future load power.

[0123] If the future stored energy is greater than the future load power, then execute S5. Use the current energy storage power as the target energy storage power until entering the gravity energy release period.

[0124] It should be explained that when the future stored energy is greater than the future load power, it means that the gravity energy storage system can meet the requirements of the regional power grid for the gravity energy storage system during the peak load period by continuing to store electricity at the current energy storage power. Therefore, there is no need to adjust the current energy storage power of the gravity energy storage system at this time.

[0125] If the future stored energy is not greater than the future load power, then execute S6. Adjust the power of the gravity energy storage system by changing the current gravity load to obtain the target energy storage power, and maintain the target energy storage power until entering the gravity energy release period.

[0126] It can be understood that the target energy storage power refers to the energy storage power that can meet the load demand power of the regional power grid during the peak load period after regulation.

[0127] Specifically, the adjustment of the power of the gravity energy storage system by changing the current gravity load includes:

[0128] Obtain the current unit load set, the heavy object contact area set, and the unit rated speed set of multiple gravity energy storage units. Among them, the current unit load set, the heavy object contact area set, and the unit rated speed set are respectively expressed as:

[0129] G0 = {G 01 , …, G 0n}

[0130] S = {S1, …, S n}

[0131] v = {v1, …, v n}

[0132] Among them, G0 represents the current unit load set of the current unit, and G 01 represents the current unit load of the first gravity energy storage unit, and G 0n represents the current unit load of the nth gravity energy storage unit, S represents the set of contact areas of the heavy objects, S1 represents the contact area of the heavy object of the first gravity energy storage unit, and S n represents the contact area of the heavy object of the nth gravity energy storage unit, v represents the set of rated unit speeds, v1 represents the rated unit speed of the first gravity energy storage unit, and v n represents the rated unit speed of the nth gravity energy storage unit, and n represents the number of gravity energy storage units;

[0133] Increase the current unit load according to the preset number of lifted heavy objects to obtain the target unit load set. Among them, the target unit load set is expressed as:

[0134] G = {G1, …, G n}

[0135] G1 = G 01 + k s × m × g, …, G n = G 0n + k s × m × g

[0136] Among them, G represents the target unit load set, G1 represents the target unit load of the first gravity energy storage unit, and G n represents the target unit load of the nth gravity energy storage unit, k s represents the number of lifted heavy objects, m represents the mass of the heavy object for energy storage, and g represents the acceleration due to gravity;

[0137] Calculate the target energy storage power according to the target unit load set, the set of contact areas of the heavy objects, and the set of rated unit speeds by using the following formula:

[0138]

[0139] Among them, P m represents the target energy storage power, μ represents the preset efficiency coefficient, δ represents the preset friction loss, i represents the serial number of the gravity energy storage unit, ρ represents the preset air density, C represents the preset drag coefficient, and G i represents the target unit load of the ith gravity energy storage unit, v i represents the rated unit speed of the ith gravity energy storage unit, and S i represents the contact area of the heavy object of the ith gravity energy storage unit.

[0140] It is understandable that the current unit load represents the total weight of the energy storage heavy objects that are currently rising in the gravity energy storage unit. The area of the energy storage heavy object refers to the total area of the energy storage heavy objects that are rising in the gravity energy storage unit and in contact with the air. The unit rated speed refers to the speed at which the gravity energy storage unit raises the energy storage heavy objects. Among them, the unit rated speed of each gravity energy storage unit is a fixed value. The number of rising heavy objects refers to the number of energy storage heavy objects that need to be added and raised to the gravity energy storage unit during the gravity energy storage period. The number of added energy storage heavy objects is to add and raise energy storage heavy objects to each gravity energy storage unit. The target unit load refers to the gravity load borne by the gravity energy storage unit after the number of energy storage heavy objects is increased during the gravity energy storage period.

[0141] It is understandable that the efficiency coefficient refers to the conversion efficiency of the gravity energy storage system in converting electrical energy into mechanical energy. This efficiency coefficient is a fixed value and can be obtained from previous measurements. The frictional loss refers to the energy loss generated by friction during the rising process of the energy storage heavy object. This friction coefficient is determined by the materials of the gravity energy storage system and is a fixed value. The resistance coefficient refers to the magnitude of the resistance suffered by the energy storage heavy object during the rising process. This resistance coefficient is a fixed value.

[0142] S7. During the gravity energy release period, obtain the bottom bin height of the transfer bottom bin and the top bin height of the transfer top bin, and calculate the falling time of the heavy object based on the bottom bin height and the top bin height.

[0143] It is understandable that the bottom bin height refers to the height of the transfer bottom bin. The top bin height refers to the height of the transfer top bin. Among them, the bottom bin height of the transfer bottom bin and the top bin height of the transfer top bin of different gravity energy storage units are the same. The falling time of the heavy object refers to the time taken for the energy storage heavy object to freely fall from the transfer top bin to the transfer bottom bin.

[0144] Specifically, calculating the falling time of the heavy object based on the bottom bin height and the top bin height includes:

[0145] According to the bottom bin height and the top bin height, use the following formula to calculate the falling height:

[0146] h x =h g -h d

[0147] Among them, h x represents the falling height, h g represents the top bin height, h d represents the bottom bin height;

[0148] Based on the falling height, use the following formula to calculate the falling time of the heavy object:

[0149]

[0150] Among them, t0 represents the falling time of the heavy object, and g represents the preset gravitational acceleration.

[0151] It can be understood that the falling height refers to the falling distance of the energy storage heavy object freely falling from the top transfer bin to the bottom transfer bin.

[0152] S8. Construct the falling constraint condition of the nth falling time according to the falling time of the heavy object and the preset first falling time, and construct the interval constraint condition of the falling interval according to the load demand power and the first falling time.

[0153] It can be understood that the first falling time refers to the advanced falling time of the first energy storage heavy object falling in the gravity energy storage system before the peak start time. The nth falling time refers to the advanced falling time of the nth energy storage heavy object falling in the gravity energy storage system before the peak start time. The falling constraint condition refers to an inequality about the nth falling time. The falling interval refers to the time interval from the start of the energy storage heavy object falling in one gravity energy storage unit to the start of the energy storage heavy object falling in the next gravity energy storage unit.

[0154] Exemplarily, a certain gravity energy storage system receives a load peak period of: (9:00 - 15:00), then the peak start time is 9:00, and the energy release preparation time set manually is 20 minutes. Then the energy release preparation time can be used as the first falling time. Then at the moment of the first falling time before the start of the load peak period, that is, at 8:40, which is 20 minutes before 9:00, the first energy storage heavy object will fall in the gravity energy storage system.

[0155] It should be explained that during the gravity energy release period, the gravity energy storage device will let the energy storage heavy objects of each gravity energy storage unit fall freely. The process of free fall is a free - fall motion. In this process, the real - time falling speed of the energy storage heavy object starts from zero and increases. Therefore, the energy release power of a single gravity energy storage unit is zero when the energy storage heavy object starts to fall. However, the regional power grid requires the gravity energy storage system to provide a load demand power at the start of the load peak period. This leads to the situation that if each gravity energy storage unit releases energy at the load peak start time, the gravity energy storage system will not be able to meet the load demand power required by the regional power grid. Therefore, it is necessary to let the gravity energy storage unit release gravity in advance. As the gravity energy storage system releases more and more electricity during the free - fall motion, a large amount of waste will be generated. Therefore, it is not possible to let all the weight energy storage units release gravity at the same moment. Therefore, it is necessary to perform the nth falling time constraint and the falling interval constraint on the gravity energy storage system.

[0156] Specifically, the construction of the falling constraint condition of the nth falling time according to the falling time of the heavy object and the preset first falling time includes:

[0157] Take the energy release preparation duration as the first falling duration, and based on the first falling duration and the heavy object falling duration, construct the following falling constraint conditions for the nth falling duration:

[0158] t n >t1 - t0

[0159] Wherein, t n represents the nth falling duration, t1 represents the first falling duration, and t0 represents the heavy object falling duration.

[0160] It should be explained that after the heavy object of the first gravity energy storage unit falls for energy storage, the last gravity energy storage unit, that is, the nth gravity energy storage unit, must start the heavy object falling for energy storage before the heavy object of the first gravity energy storage unit completely lands, and thus the falling constraint conditions for the nth falling duration can be constructed.

[0161] Specifically, constructing the interval constraint conditions of the falling interval according to the load demand power and the first falling duration includes:

[0162] Construct the following interval constraint conditions of the falling interval according to the load demand power and the first falling duration:

[0163] And:

[0164] Wherein, Δt represents the falling interval, n represents the number of gravity energy storage units, P f represents the load demand power, g represents the acceleration due to gravity, and m represents the mass of the heavy object for energy storage.

[0165] It should be explained that before the heavy object released by the first gravity energy storage unit completely falls, the heavy objects of all subsequent gravity energy storage units must have started to fall, and thus one of the necessary conditions for the falling interval is obtained: (n - 1)×Δt < t0. At the same time, the starting release power of the gravity energy storage system at the beginning of the peak load period must be greater than the load demand power, that is, the sum of the unit release powers of all gravity energy storage units in the gravity energy storage system at the peak start moment is greater than the load demand power, and thus the second necessary condition for the falling interval is obtained: m×g×g×(t1 + t2 + … + t n ) > P f , wherein, t2 = t1 - Δt, …, t n = t1 - (n - 1)×Δt. Therefore, the interval constraint conditions can be constructed according to the two necessary conditions of the falling interval.

[0166] S9. Based on the first falling duration, the falling constraint conditions and the interval constraint conditions, set the falling duration set, and perform power regulation on the gravity energy storage system according to the falling duration set, the target energy storage power and the current energy storage power.

[0167] It is understandable that the set of falling durations refers to the set of the durations for all gravity energy storage units to release the energy storage heavy objects in advance before the peak start time.

[0168] Exemplarily, a certain heavy object energy storage system receives a load peak period of: (9:00 - 15:00). This heavy object energy storage system has 5 gravity energy storage units. This gravity energy storage system will drop an energy storage heavy object of one gravity energy storage unit at 8:40. After a time interval of 2 minutes, that is, at 8:42, it will drop an energy storage heavy object of one gravity energy storage unit,... At 8:48, it will drop the last energy storage heavy object of one gravity energy storage unit. Among them, the interval durations between the moments when each energy storage heavy object drops and the peak start time of the load peak period are: 20 min, 18 min, 16 min, 14 min, and 12 min. Then the first falling duration, the second falling duration, the third falling duration, the fourth falling duration, and the fifth falling duration are respectively: 20 min, 18 min, 16 min, 14 min, and 12 min. Summarize the falling durations into a set of falling durations: {20 min, 18 min, 16 min, 14 min, 12 min}.

[0169] Specifically, setting the set of falling durations based on the first falling duration, falling constraint conditions, and interval constraint conditions includes:

[0170] Set the falling interval according to the interval constraint conditions, and calculate the set of falling durations of the gravity energy storage system according to the first falling duration, falling interval, and falling constraint conditions. The set of falling durations is expressed as:

[0171] t = {t1, t2,..., t n}

[0172] t n = t n-1 - Δt

[0173] where t2 represents the second falling duration, t n represents the nth falling duration, and t n-1 represents the (n - 1)th falling duration.

[0174] It should be explained that after determining the set of falling durations, select a gravity energy storage unit as the first energy storage unit, and release an energy storage heavy object of the first energy storage unit from the transfer top bin of the first energy storage unit. After Δt when the first energy storage unit releases the energy storage heavy object, select a gravity energy storage unit as the second energy storage unit, and release an energy storage heavy object of the second energy storage unit from the transfer top bin of the second energy storage unit,... After Δt when the (n - 1)th energy storage unit releases the energy storage heavy object, release an energy storage heavy object of the nth energy storage unit from the transfer top bin of the nth energy storage unit.

[0175] For example, a gravity energy storage system has a total of 5 gravity energy storage units. The peak load period received at a certain time is (9:0015:00), and the gravity energy release period is (8:4015:00). The set falling time set is {20min, 18min, 16min, 14min, 12min}. The gravity energy storage system will perform the following energy release operation: a stored energy weight of a gravity energy storage unit will fall at 8:40, 8:42, 8:44, 8:46 and 8:48 respectively.

[0176] In detail, the power regulation of the gravity energy storage system according to the falling time set, the target energy storage power and the current energy storage power includes:

[0177] The gravity energy release power of the gravity energy storage system is calculated using the following formula:

[0178] P s =m×g 2 ×[t1-(n-1)×Δt], and:

[0179] Among them, P s represents the gravity energy release power, W0 represents the current energy storage capacity, P m represents the target energy storage power;

[0180] Determine whether the load demand power is greater than the gravity energy release power:

[0181] If the load demand power is greater than the gravity energy release power, the energy storage weight is adjusted by adding a preset number of falling weights to the gravity energy storage system;

[0182] The gravity energy release power is regulated according to the regulating energy storage weight to obtain a target energy release power, which is expressed as:

[0183] P l =m×g 2 ×[t1-(n-1)×Δt]+G x ×h k , G x =k x ×m×g

[0184] and:

[0185]

[0186] Among them, P l Represents the target energy release power, G x Indicates the regulated energy storage weight, h krepresents the increased height of the falling energy storage heavy object, k x represents the number of falling heavy objects;

[0187] Take the target energy release power as the gravitational energy release power, and return the step of judging whether the load demand power is greater than the gravitational energy release power;

[0188] If the load demand power is not greater than the gravitational energy release power, maintain the gravitational energy storage power until the end of the gravitational energy release period, and complete the power regulation of the gravitational energy storage system.

[0189] It can be understood that the number of falling heavy objects refers to the number of energy storage heavy objects that need to be added to fall in the gravitational energy release period of the gravitational energy storage system. The increased number of falling heavy objects is to increase the falling energy storage heavy objects of the entire gravitational energy storage system, rather than adding falling energy storage heavy objects to a single gravitational energy storage unit. The regulated energy storage heavy object refers to the total weight of the increased number of falling heavy objects.

[0190] Exemplarily, at a certain moment in the gravitational energy release period of a certain gravitational energy storage system, the number of energy storage heavy objects falling is 100, and the mass of the heavy object of the energy storage heavy object is 100 kg. Among them, 100 energy storage heavy objects are the total number of energy storage heavy objects falling in all gravitational energy storage units. The set number of falling heavy objects is 5. When it is judged that the load demand power is greater than the gravitational energy release power, 5 falling energy storage heavy objects are added to the entire gravitational energy release system. At this time, the regulated energy storage weight is 5×100 = 500 kg.

[0191] To solve the problems described in the background art, the present invention obtains the peak load period and the load demand power of the regional power grid, calculates the peak demand power consumption based on the peak load period and the load demand power, realizes the accurate acquisition of the load situation of the regional power grid, and provides a prerequisite and a control basis for subsequent power regulation. According to the peak load period, the working stages of the gravity energy storage system are divided to obtain the gravity energy storage period and the gravity energy release period, which clarifies the working mode of the gravity energy storage system and enables the gravity energy storage system to respond to the regional power grid faster according to the working stages. During the gravity energy storage period, the current energy storage power, the current energy storage power, and the current gravity load of the gravity energy storage system are obtained, and the future load power consumption is calculated based on the peak demand power consumption and the current energy storage power. This provides conditions for subsequent power regulation and clarifies the target of power regulation. Next, according to the peak load period and the current energy storage power, the future energy storage power of the gravity energy storage system is calculated, providing conditions for the next judgment process. By judging whether the future energy storage power is greater than the future load power, the gravity energy storage system can filter out situations where power regulation is not required, which speeds up the process of power regulation and the response time of the gravity energy storage system. If the future energy storage power is greater than the future load power, the current energy storage power is used as the target energy storage power until the gravity energy release period is entered, further speeding up the process of power regulation. If the future energy storage power is not greater than the future load power, the power of the gravity energy storage system is regulated by changing the current gravity load to obtain the target energy storage power and maintaining the target energy storage power until the gravity energy release period is entered. This step highly correlates the load response of the regional power grid with the energy storage power of the gravity energy storage system, enabling the power regulation of the gravity energy storage system to always meet the load demand of the regional power grid and further speeding up the response time of the gravity energy storage system. During the gravity energy release period, by constructing the falling constraint condition of the nth falling time based on the falling time of the heavy object and the first falling time, and constructing the interval constraint condition of the falling interval based on the load demand power and the first falling time, this step solves the situation where the gravity energy release power of the gravity energy storage system cannot meet the load demand power during the gravity energy release period by advancing the falling of the energy storage heavy object, speeding up the response time of the gravity energy storage system. Finally, based on the first falling time, the falling constraint condition, and the interval constraint condition, a set of falling times is set, and the power of the gravity energy storage system is regulated according to the set of falling times, the target energy storage power, and the current energy storage power. This step releases multiple energy storage heavy objects one by one, enabling the gravity energy release power during the entire gravity energy release period to be well controlled, thereby preventing a large amount of energy waste caused by the disorderly falling of the energy storage heavy objects. Therefore, the present invention can speed up the response time of the power regulation of the gravity energy storage system and reduce the energy waste during the energy supply process.

[0192] Such as Figure 2As shown, it is a functional module diagram of a power regulation system for a gravity energy storage system based on load response provided by an embodiment of the present invention.

[0193] The power regulation system 100 of the gravity energy storage system based on load response of the present invention can be installed in an electronic device. According to the functions achieved, the power regulation system 100 of the gravity energy storage system based on load response can include a grid load acquisition module 101, an energy storage power calculation module 102, an energy storage power regulation module 103, and an energy release power regulation module 104. The modules of the present invention can also be referred to as units, which refer to a series of computer program segments that can be executed by a processor of an electronic device and can complete fixed functions, and are stored in the memory of the electronic device.

[0194] The grid load acquisition module 101 is used to obtain the peak load period and the load demand power of the regional power grid, calculate the peak demand power based on the peak load period and the load demand power, and divide the working stages of the pre-constructed gravity energy storage system according to the peak load period to obtain the gravity energy storage period and the gravity energy release period. Among them, the gravity energy storage system includes a plurality of gravity energy storage units, and the gravity energy storage unit includes: energy storage heavy objects, a transfer bottom bin, a transfer top bin, and a transfer belt;

[0195] The energy storage power calculation module 102 is used to obtain the current energy storage power, the current energy storage power, and the current gravity load of the gravity energy storage system during the gravity energy storage period, calculate the future load power based on the peak demand power and the current energy storage power, and calculate the future energy storage power of the gravity energy storage system according to the peak load period and the current energy storage power;

[0196] The energy storage power regulation module 103 is used to determine whether the future energy storage power is greater than the future load power. If the future energy storage power is greater than the future load power, the current energy storage power is used as the target energy storage power until the gravity energy release period is entered. If the future energy storage power is not greater than the future load power, the power of the gravity energy storage system is regulated by changing the current gravity load to obtain the target energy storage power, and the target energy storage power is maintained until the gravity energy release period is entered;

[0197] The energy release power regulation module 104 is used to obtain the bottom bin height of the transfer bottom bin and the top bin height of the transfer top bin during the gravity energy release period, calculate the falling time of the heavy object based on the bottom bin height and the top bin height, construct the falling constraint condition of the nth falling time according to the falling time of the heavy object and the preset first falling time, construct the interval constraint condition of the falling interval according to the load demand power and the first falling time, set the falling time set based on the first falling time, the falling constraint condition, and the interval constraint condition, and regulate the power of the gravity energy storage system according to the falling time set, the target energy storage power, and the current energy storage power.

[0198] Specifically, when the modules in the power regulation system 100 of the gravity energy storage system based on load response in the embodiments of the present invention are used, they adopt the same technical means as those in the above-mentioned Figure 1 and can produce the same technical effects, which will not be elaborated here.

[0199] As Figure 3 shown, it is a schematic structural diagram of an electronic device for implementing the power regulation method of the gravity energy storage system based on load response provided by an embodiment of the present invention.

[0200] The electronic device 1 may include a processor 10, a memory 11, and a bus 12, and may also include a computer program stored in the memory 11 and executable on the processor 10, such as a power regulation method program for the gravity energy storage system based on load response.

[0201] Among them, the memory 11 includes at least one type of readable storage medium, and the readable storage medium includes flash memory, mobile hard disk, multimedia card, card-type memory (such as SD or DX memory, etc.), magnetic memory, disk, optical disc, etc. The memory 11 may be an internal storage unit of the electronic device 1 in some embodiments, such as the mobile hard disk of the electronic device 1. The memory 11 may also be an external storage device of the electronic device 1 in other embodiments, such as a plug-in mobile hard disk, a Smart Media Card (SMC), a Secure Digital (SD) card, a Flash Card, etc. equipped on the electronic device 1. Further, the memory 11 also includes the internal storage unit of the electronic device 1 and the external storage device. The memory 11 can not only be used to store application software installed on the electronic device 1 and various types of data, such as the code of the power regulation method program for the gravity energy storage system based on load response, but also be used to temporarily store data that has been output or will be output.

[0202] In some embodiments, the processor 10 may be composed of an integrated circuit. For example, it may be composed of a single packaged integrated circuit, or may be composed of multiple packaged integrated circuits with the same or different functions, including a combination of one or more central processing units (CPUs), microprocessors, digital processing chips, graphics processors, and various control chips. The processor 10 is the control core (Control Unit) of the electronic device, connecting various components of the entire electronic device through various interfaces and lines, and by running or executing programs or modules stored in the memory 11 (such as the program for the power regulation method of the gravity energy storage system based on load response, etc.), and by calling the data stored in the memory 11, to execute various functions of the electronic device 1 and process data.

[0203] The bus 12 may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc. This bus 12 can be divided into an address bus, a data bus, a control bus, etc. The bus 12 is arranged to enable connection and communication between the memory 11 and at least one processor 10, etc.

[0204] Figure 3 Only the electronic device with components is shown. Those skilled in the art can understand that, Figure 3 The shown structure does not constitute a limitation on the electronic device 1, and it may include fewer or more components than shown, or combine certain components, or have a different component layout.

[0205] For example, although not shown, the electronic device 1 may further include a power source (such as a battery) for supplying power to each component. Preferably, the power source can be logically connected to the at least one processor 10 through a power management device, so as to implement functions such as charge management, discharge management, and power consumption management through the power management device. The power source may also include any components such as one or more DC or AC power sources, a recharge device, a power failure detection circuit, a power converter or inverter, and a power status indicator. The electronic device 1 may also include various sensors, a Bluetooth module, a Wi-Fi module, etc., which will not be elaborated here.

[0206] Furthermore, the electronic device 1 may further include a network interface. Optionally, the network interface may include a wired interface and / or a wireless interface (such as a WI-FI interface, a Bluetooth interface, etc.), which is generally used to establish a communication connection between the electronic device 1 and other electronic devices.

[0207] Optionally, the electronic device 1 may further include a user interface, which may be a display, an input unit (such as a keyboard), and optionally, the user interface may also be a standard wired interface or a wireless interface. Optionally, in some embodiments, the display may be an LED display, a liquid crystal display, a touch liquid crystal display, and an OLED (Organic Light-Emitting Diode) toucher, etc. Among them, the display may also be appropriately referred to as a display screen or a display unit, which is used to display the information processed in the electronic device 1 and to display a visual user interface.

[0208] The program of the method for regulating the power of the gravity energy storage system based on load response stored in the memory 11 of the electronic device 1 is a combination of multiple instructions. When running in the processor 10, it can implement:

[0209] Obtain the peak load period and the load demand power of the regional power grid, and calculate the peak demand power consumption based on the peak load period and the load demand power;

[0210] According to the peak load period, divide the pre-constructed gravity energy storage system into working stages to obtain the gravity energy storage period and the gravity energy release period. Among them, the gravity energy storage system includes multiple gravity energy storage units, and each gravity energy storage unit includes: a storage heavy object, a transfer bottom bin, a transfer top bin, and a transfer belt;

[0211] During the gravity energy storage period, obtain the current energy storage power, the current energy storage power, and the current gravity load of the gravity energy storage system. Calculate the future load power consumption based on the peak demand power consumption and the current energy storage power. According to the peak load period and the current energy storage power, calculate the future energy storage power of the gravity energy storage system;

[0212] Judge whether the future energy storage power is greater than the future load power consumption;

[0213] If the future energy storage power is greater than the future load power consumption, then use the current energy storage power as the target energy storage power until entering the gravity energy release period;

[0214] If the future energy storage power is not greater than the future load power consumption, then regulate the power of the gravity energy storage system by changing the current gravity load to obtain the target energy storage power, and maintain the target energy storage power until entering the gravity energy release period;

[0215] During the gravity energy release period, obtain the bottom bin height of the transfer bottom bin and the top bin height of the transfer top bin, and calculate the falling time of the heavy object based on the bottom bin height and the top bin height;

[0216] Construct the falling constraint conditions for the nth falling duration based on the falling duration of the heavy object and the preset first falling duration, and construct the interval constraint conditions for the falling interval based on the load demand power and the first falling duration;

[0217] Based on the first falling duration, the falling constraint conditions and the interval constraint conditions, set a set of falling durations, and perform power regulation on the gravity energy storage system according to the set of falling durations, the target energy storage power and the current energy storage power of the battery.

[0218] Specifically, the specific implementation method of the processor 10 for the above instructions can refer to Figures 1 to 3 the description of the relevant steps in the corresponding embodiment, which will not be repeated here.

[0219] Further, if the modules / units integrated in the electronic device 1 are implemented in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium. The computer-readable storage medium can be volatile or non-volatile. For example, the computer-readable medium may include: any entity or device capable of carrying the computer program code, a recording medium, a USB flash drive, a mobile hard disk, a magnetic disk, an optical disk, a computer memory, a read-only memory (ROM, Read-Only Memory).

[0220] The present invention also provides a computer-readable storage medium, which stores a computer program, and when the computer program is executed by a processor of an electronic device, it can achieve:

[0221] Obtain the peak load period and load demand power of the regional power grid, and calculate the peak demand power based on the peak load period and load demand power;

[0222] According to the peak load period, divide the working stage of the pre-constructed gravity energy storage system to obtain the gravity energy storage period and the gravity energy release period. Among them, the gravity energy storage system includes a plurality of gravity energy storage units, and the gravity energy storage unit includes: a storage heavy object, a transfer bottom bin, a transfer top bin and a transfer belt;

[0223] In the gravity energy storage period, obtain the current energy storage power, current energy storage power and current gravity load of the gravity energy storage system, calculate the future load power according to the peak demand power and the current energy storage power, and calculate the future energy storage power of the gravity energy storage system according to the peak load period and the current energy storage power;

[0224] Judge whether the future energy storage power is greater than the future load power;

[0225] If the future energy storage power is greater than the future load power, then use the current energy storage power as the target energy storage power until entering the gravity energy release period;

[0226] If the future energy storage power is not greater than the future load power, the power of the gravity energy storage system is regulated by changing the current gravity load to obtain the target energy storage power, and the target energy storage power is maintained until entering the gravity energy release period;

[0227] In the gravity energy release period, obtain the bottom bin height of the transfer bottom bin and the top bin height of the transfer top bin, and calculate the falling time of the heavy object based on the bottom bin height and the top bin height;

[0228] According to the falling time of the heavy object and the preset first falling time, construct the falling constraint condition of the nth falling time, and construct the interval constraint condition of the falling interval according to the load demand power and the first falling time;

[0229] Based on the first falling time, the falling constraint condition and the interval constraint condition, set the falling time set, and regulate the power of the gravity energy storage system according to the falling time set, the target energy storage power and the current energy storage power.

[0230] In several embodiments provided by the present invention, it should be understood that the disclosed devices, systems and methods can be implemented in other ways. For example, the system embodiments described above are only illustrative, and there may be other division methods in actual implementation.

[0231] The modules described as separate components may or may not be physically separated, and the components shown as modules may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0232] In addition, each functional module in various embodiments of the present invention can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit. The above integrated unit can be implemented in the form of hardware, or in the form of hardware plus software functional modules.

[0233] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms.

[0234] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A power regulation method for a gravity energy storage system based on load response, characterized in that, The method includes: Obtaining the peak load period and the load demand power of the regional power grid, and calculating the peak demand electricity based on the peak load period and the load demand power; Dividing the working stages of the pre-constructed gravity energy storage system according to the peak load period to obtain the gravity energy storage period and the gravity energy release period. Among them, the gravity energy storage system includes a plurality of gravity energy storage units, and each gravity energy storage unit includes: a storage heavy object, a transfer bottom bin, a transfer top bin, and a transfer belt; During the gravity energy storage period, obtaining the current energy storage power, the current energy storage power, and the current gravity load of the gravity energy storage system, calculating the future load electricity according to the peak demand electricity and the current energy storage electricity, and calculating the future energy storage electricity of the gravity energy storage system according to the peak load period and the current energy storage power; Judging whether the future energy storage electricity is greater than the future load electricity; If the future energy storage electricity is greater than the future load electricity, then taking the current energy storage power as the target energy storage power until entering the gravity energy release period; If the future energy storage electricity is not greater than the future load electricity, then adjusting the power of the gravity energy storage system by changing the current gravity load to obtain the target energy storage power, and maintaining the target energy storage power until entering the gravity energy release period; During the gravity energy release period, obtaining the bottom bin height of the transfer bottom bin and the top bin height of the transfer top bin, and calculating the falling time of the heavy object based on the bottom bin height and the top bin height; Constructing the falling constraint condition of the nth falling time according to the falling time of the heavy object and the preset first falling time, and constructing the interval constraint condition of the falling interval according to the load demand power and the first falling time; Based on the first falling time, the falling constraint condition, and the interval constraint condition, setting a set of falling times, and adjusting the power of the gravity energy storage system according to the set of falling times, the target energy storage power, and the current energy storage electricity.

2. The power regulation method of the gravity energy storage system based on load response according to claim 1, characterized in that The calculating the peak demand electricity based on the peak load period and the load demand power includes: Obtaining the peak load duration of the peak load period, where the peak load period is expressed as: T f = (T k T j ) Among them, T f represents the peak load period, T k represents the start time of the peak, T j represents the end time of the peak; Calculating the peak demand electricity using the following formula: W f = (T j - T k ) × P f Among them, W f represents the peak demand electricity, and P f represents the load demand power.

3. The power regulation method of the gravity energy storage system based on load response according to claim 2, characterized in that, The dividing the working stages of the pre-constructed gravity energy storage system according to the peak load period to obtain the gravity energy storage period and the gravity energy release period includes: Obtaining the current time, and setting an energy release preparation duration based on the load demand power; Determining the actual start time according to the peak start time of the peak load period and the energy release preparation duration, where the actual start time is expressed as: T a = T k - t z Among them, T a represents the actual start time, and t z represents the energy release preparation duration; Determining the gravity energy storage period according to the current time and the actual start time, and determining the gravity energy release period according to the actual start time and the peak end time, where the gravity energy storage period and the gravity energy release stage are respectively expressed as: T c = (T n T a ), T s = (T a T j ) Among them, T n represents the current moment, T c represents the gravity energy storage period, and T s represents the gravity energy release period.

4. The power regulation method of the gravity energy storage system based on load response according to claim 3, wherein, The adjusting the power of the gravity energy storage system by changing the current gravity load includes: Obtaining the current unit load set, the heavy object contact area set, and the unit rated speed set of a plurality of gravity energy storage units, where the current unit load set, the heavy object contact area set, and the unit rated speed set are respectively expressed as: G0 = {G 01 , …, G 0n} S = {S1, …, S n} v = {v1, …, v n} Among them, G0 represents the current unit load set, and G 01 represents the current unit load of the first gravity energy storage unit, and G 0n represents the current unit load of the nth gravity energy storage unit. S represents the set of contact areas of heavy objects, S1 represents the contact area of heavy objects of the first gravity energy storage unit, and S n represents the contact area of heavy objects of the nth gravity energy storage unit. v represents the set of rated unit speeds, v1 represents the rated unit speed of the first gravity energy storage unit, and v n represents the rated unit speed of the nth gravity energy storage unit, and n represents the number of gravity energy storage units; Increasing the current unit load according to the preset number of rising heavy objects to obtain the target unit load set, where the target unit load set is expressed as: G = {G1, …, G n} G1 = G 01 + k s × m × g,..., G n = G 0n + k s × m × g Among them, G represents the target unit load set, G1 represents the target unit load of the first gravity energy storage unit, and G n represents the target unit load of the nth gravity energy storage unit, and k s represents the number of rising heavy objects, m represents the mass of the heavy object of the energy storage heavy object, and g represents the acceleration due to gravity; According to the target unit load set, the heavy object contact area set, and the unit rated speed set, calculate the target energy storage power using the following formula: Among them, P m represents the target energy storage power, μ represents the preset efficiency coefficient, δ represents the preset friction loss, i represents the serial number of the gravity energy storage unit, ρ represents the preset air density, C represents the preset resistance coefficient, G i represents the target unit load of the i-th gravity energy storage unit, v i represents the unit rated speed of the i-th gravity energy storage unit, S i represents the weight contact area of the i-th gravity energy storage unit.

5. The power regulation method of the gravity energy storage system based on load response according to claim 4, wherein Calculating the falling time of the heavy object based on the bottom bin height and the top bin height includes: According to the bottom bin height and the top bin height, calculate the falling height using the following formula: h x = h g -h d Among them, h x represents the falling height, h g represents the top bin height, h d represents the bottom bin height; Based on the falling height, calculate the falling time of the heavy object using the following formula: Where, t0 represents the falling time of the heavy object, and g represents the preset gravitational acceleration.

6. The power regulation method of the gravity energy storage system based on load response according to claim 5, wherein Constructing the falling constraint condition of the nth falling time according to the falling time of the heavy object and the preset first falling time includes: Taking the energy release preparation time as the first falling time, and constructing the following falling constraint condition of the nth falling time based on the first falling time and the falling time of the heavy object: t n >t1 - t0 Among them, t n represents the nth falling duration, t1 represents the first falling duration, and t0 represents the falling duration of the heavy object.

7. The power regulation method of the gravity energy storage system based on load response according to claim 6, characterized in that Constructing the interval constraint condition of the falling interval according to the load demand power and the first falling time includes: According to the load demand power and the first falling time, construct the following interval constraint condition of the falling interval: And: Among them, Δt represents the falling interval, n represents the number of gravity energy storage units, P f represents the load demand power, g represents the acceleration due to gravity, and m represents the mass of the heavy object for energy storage.

8. The power regulation method of the gravity energy storage system based on load response according to claim 7, wherein, Setting the falling time set based on the first falling time, the falling constraint condition, and the interval constraint condition includes: Set the falling interval according to the interval constraint condition, and calculate the falling time set of the gravity energy storage system according to the first falling time, the falling interval, and the falling constraint condition. The falling time set is expressed as: t = {t1, t2, …, t n} t n = t n-1 - Δt Among them, t2 represents the second falling duration, and t n represents the nth falling duration, and t n-1 represents the (n - 1)th falling duration.

9. The power regulation method of the gravity energy storage system based on load response according to claim 8, characterized in that Performing power regulation on the gravity energy storage system according to the falling time set, the target energy storage power, and the current energy storage power includes: Calculate the gravity energy release power of the gravity energy storage system using the following formula: P s = m×g 2 ×[t1 - (n - 1)×Δt], and: Among them, P s represents the gravity energy release power, W0 represents the current energy storage power, and P m represents the target energy storage power; Judge whether the load demand power is greater than the gravity energy release power: If the load demand power is greater than the gravity energy release power, then obtain the regulated energy storage heavy objects by adding the preset number of energy storage heavy objects to the gravity energy storage system; Perform power regulation on the gravity energy release power according to the regulated energy storage heavy objects to obtain the target energy release power, and the target energy release power is expressed as: P l = m×g 2 ×[t1 - (n - 1)×Δt[ + k x ×m×g×h k And: Among them, P l represents the target energy release power, k x represents the number of falling heavy objects, h k represents the height of the increased falling energy storage heavy object; Take the target energy release power as the gravity energy release power, and return to the step of judging whether the load demand power is greater than the gravity energy release power; If the load demand power is not greater than the gravity energy release power, then maintain the gravity energy storage power until the end of the gravity energy release period, and complete the power regulation of the gravity energy storage system.

10. A power regulation system for a gravity energy storage system based on load response, characterized in that, The system includes: A grid load acquisition module, which is used to acquire the load peak period and the load demand power of the regional power grid, calculate the peak demand power according to the load peak period and the load demand power, and divide the working stage of the pre-constructed gravity energy storage system according to the load peak period to obtain the gravity energy storage period and the gravity energy release period. Among them, the gravity energy storage system includes a plurality of gravity energy storage units, and the gravity energy storage unit includes: energy storage heavy objects, a transfer bottom bin, a transfer top bin, and a transfer belt; An energy storage power calculation module, which is used to obtain the current energy storage power, the current gravity load of the gravity energy storage system during the gravity energy storage period, calculate the future load power according to the peak demand power and the current energy storage power, and calculate the future energy storage power of the gravity energy storage system according to the load peak period and the current energy storage power; Energy storage power regulation module, which is used to judge whether the future energy storage power is greater than the future load power. If the future energy storage power is greater than the future load power, the current energy storage power is used as the target energy storage power until the gravity energy release period is entered. If the future energy storage power is not greater than the future load power, the power of the gravity energy storage system is regulated by changing the current gravity load to obtain the target energy storage power, and the target energy storage power is maintained until the gravity energy release period is entered; Energy release power regulation module, which is used to obtain the bottom bin height of the transfer bottom bin and the top bin height of the transfer top bin during the gravity energy release period, calculate the falling time of the heavy object based on the bottom bin height and the top bin height, construct the falling constraint condition of the nth falling time according to the falling time of the heavy object and the preset first falling time, construct the interval constraint condition of the falling interval according to the load demand power and the first falling time, set the falling time set based on the first falling time, the falling constraint condition and the interval constraint condition, and regulate the power of the gravity energy storage system according to the falling time set, the target energy storage power and the current energy storage power.

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