Pumped storage power adjustable capacity improving method, system, equipment and medium

Abstract

The invention provides a pumped storage power adjustable capability improving method, system and device and a medium, and the method comprises the steps: determining the maximum vacancy power under the combination of different unit operation modes based on the operation modes of units in a pumped storage power station, the rated power of the units and the mechanical oscillation interval; based on the maximum vacancy power, the rated power and capacity of electrochemical energy storage which should be configured by the power station are calculated by using a power objective function; based on the rated power and capacity of the electrochemical energy storage, calculating the real-time power adjusting range of the electrochemical energy storage and each unit by using a cost objective function so as to improve the power adjustable capability of the pumped storage power station; according to the method, the maximum vacancy power under different operation combinations is determined based on the mechanical oscillation interval and the operation mode of the pumped storage unit, electrochemical energy storage is introduced with complementation of the maximum vacancy power as a target to improve the power adjustment range, and the defect that the adjustable capacity of pumped storage is reduced due to avoidance of the oscillation interval can be overcome; and the adjustable capability of pumped storage power is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of coordinated operation of pumped storage and electrochemical energy storage, and in particular to a method, system, equipment and medium for improving the power adjustable capacity of pumped storage. Background Art

[0002] Pumped storage systems, as the lowest-cost energy storage facility per unit capacity, play a vital role in power grids. However, due to their narrow power regulation range, slow speed, and low accuracy, they struggle to handle rapid power grid regulation. Furthermore, traditional pumped storage systems experience mechanical oscillations during power generation. To mitigate these oscillations, the operating range of pumped storage systems is divided into multiple discrete power ranges. This results in frequent, short-term starts and stops, severely reducing their adjustable capacity.

[0003] Existing solutions, aside from small-scale power adjustments within the operating range, primarily adjust the output power of pumped storage systems through state transitions or optimization of multiple unit combinations. However, practical results indicate that these methods have yielded unsatisfactory power regulation results. Summary of the Invention

[0004] In order to solve the problem in the prior art that the power adjustable capacity of pumped storage is seriously reduced due to avoiding the mechanical oscillation range, the present invention proposes a method for improving the power adjustable capacity of pumped storage, comprising:

[0005] Determining the maximum power deficit of the pumped-storage power station under different combinations of unit operating modes based on the operating modes, rated powers, and mechanical oscillation ranges of the units in the pumped-storage power station;

[0006] Based on the maximum power shortage, a pre-established power objective function is used to calculate the rated power and capacity of the electrochemical energy storage that should be configured for the power station;

[0007] Based on the rated power and capacity of the electrochemical energy storage, a pre-established cost objective function is used to calculate the real-time power regulation range of the electrochemical energy storage and each unit to improve the power regulation capability of the pumped storage power station;

[0008] The power objective function is constructed with the goal of making up for the maximum power deficit; and the cost objective function is constructed with the goal of minimizing the total power regulation cost of the power station and electrochemical energy storage.

[0009] Preferably, the determining of the maximum power shortage of the power station under different combinations of unit operating modes based on the operating mode, rated power and mechanical oscillation range of the units in the pumped storage power station includes:

[0010] Determining an operating mode combination of the units in the power plant based on the operating modes of the units;

[0011] Calculate the power shortage interval of each operating mode combination based on the rated power and mechanical oscillation interval of the unit;

[0012] Determining the maximum power shortage according to the maximum value of the power shortage intervals of each combination;

[0013] The mechanical oscillation range of each unit is determined based on the model of each unit.

[0014] Preferably, the operation mode of the unit includes shutdown, pumping water and power generation.

[0015] Preferably, after determining the operating mode combination of the units in the power station based on the operating mode of the units, and before respectively calculating the power shortage interval of each operating mode combination based on the rated power and mechanical oscillation interval of the units, the method further includes:

[0016] Based on the operating mode of the unit, determining invalid combinations among the operating mode combinations and eliminating them;

[0017] The invalid combination includes units in pumping operation mode and units in power generation operation mode.

[0018] Preferably, the power shortage interval of each operation mode combination is calculated based on the rated power and mechanical oscillation interval of the unit, including:

[0019] Based on the rated power and mechanical oscillation interval of the units, the computer unit operates in a power deficit interval of each unit during power generation;

[0020] Based on the power shortage intervals of each unit when the unit operation mode is power generation, the power shortage intervals of the operation mode combination when the unit operation mode includes the unit in the power generation operation mode are calculated.

[0021] Preferably, the construction of the power objective function includes:

[0022] With the goal of making up for the maximum power shortage, with the constraint of improving the power regulation flexibility of the power station, with the maximum power shortage as input, and with the rated power and capacity of the electrochemical energy storage to be configured in the power station as output, it is constructed by setting the capacity coefficient.

[0023] Preferably, the power objective function is expressed as follows:

[0024]

[0025] E ES,max =bP ES,max

[0026] Where, P ES,max is the rated power of the electrochemical energy storage, is the rated power of the sth unit, a s is the power shortage interval of the sth unit, b is the capacity factor, E ES,max is the capacity of the electrochemical energy storage, and S is the total number of the units.

[0027] Preferably, the construction of the cost objective function includes:

[0028] The system is constructed with the goal of minimizing the total power regulation cost of the power station and the electrochemical energy storage, the rated power and capacity of the electrochemical energy storage as input, and the real-time power of the electrochemical energy storage and each unit as output, by setting the operating constraints of the electrochemical energy storage and the units.

[0029] Preferably, the operating mode constraint of the electrochemical energy storage is expressed as follows:

[0030]

[0031] Where, is the charging state parameter of the electrochemical energy storage at time t, is the discharge state parameter of the electrochemical energy storage at time t, P ES,max is the rated power of the electrochemical energy storage, P ES (t) is the power of the electrochemical energy storage at time t, E ES (t) is the capacity of the electrochemical energy storage at time t, E ES (t-1) is the capacity of the electrochemical energy storage at time t-1, η ES is the energy storage efficiency of the electrochemical energy storage, SOC min The minimum state of charge of the electrochemical energy storage, SOC max is the maximum state of charge of the electrochemical energy storage, E ES,max is the capacity of the electrochemical energy storage, and is a (0, 1) variable.

[0032] Preferably, the operating mode constraint of the unit is expressed as follows:

[0033]

[0034] U SG (t)+U SP (t)≤1

[0035] P G,s (t) = P GG,s (t)+P GP,s (t)

[0036] Where, P GG,s (t) is the power of the sth unit at time t when it is in the power generation state, is the lower power limit of the sth unit in the low power range under power generation status, is the lower power limit of the sth unit in the high power range under power generation status, is the upper limit of the power of the sth unit in the low power range under the power generation state, is the upper limit of the power of the sth unit in the high power range under the power generation state, is the state parameter of the sth unit in the low power range at time t, is the state parameter of the sth unit in the high power range at time t, U GG,s (t) is the state parameter of the sth unit under power generation at time t, P GP,s (t) is the power of the sth unit at the moment t under the pumping state, is the rated power of the sth unit in the pumping state, U GP,s (t) is the state parameter of the sth unit in the pumping state at time t, S is the total number of units, U SG (t) is the state parameter of all units in the power generation state at time t, U SP (t) is the state parameter of all units in the pumping state at time t, P G,s (t) is the power of the sth unit at time t, U GG,s (t), U GP,s (t), U SG (t) and U SP (t) are all (0, 1) variables.

[0037] In another aspect, the present invention further provides a pumped storage power adjustable capacity enhancement system, comprising: a power shortage calculation module, an electrochemical energy storage configuration calculation module, and an adjustable capacity enhancement calculation module;

[0038] The shortfall power calculation module is configured to determine the maximum shortfall power of the pumped storage power station under different combinations of unit operating modes based on the operating mode, rated power, and mechanical oscillation range of the units in the pumped storage power station;

[0039] The electrochemical energy storage configuration calculation module is used to calculate the rated power and capacity of the electrochemical energy storage to be configured for the power station based on the maximum power shortage using a pre-established power objective function;

[0040] The adjustable capacity improvement calculation module is used to calculate the real-time power adjustment range of the electrochemical energy storage and each unit based on the rated power and capacity of the electrochemical energy storage using a pre-established cost objective function to improve the power adjustable capacity of the pumped storage power station;

[0041] The power objective function is constructed with the goal of making up for the maximum power deficit; and the cost objective function is constructed with the goal of minimizing the total power regulation cost of the power station and electrochemical energy storage.

[0042] Preferably, the power shortage calculation module includes: an operation mode combination unit, a power shortage interval calculation unit and a maximum power shortage calculation unit;

[0043] The operation mode combination unit is used to determine the operation mode combination of the units in the power station based on the operation mode of the units;

[0044] The power shortage interval calculation unit is used to calculate the power shortage interval of each operation mode combination based on the rated power and mechanical oscillation interval of the unit;

[0045] The maximum shortfall power calculation unit is configured to determine the maximum shortfall power using the maximum value of the power shortfall intervals of each combination;

[0046] The mechanical oscillation range of each unit is determined based on the model of each unit.

[0047] Preferably, the operation mode of the unit includes shutdown, pumping water and power generation.

[0048] Preferably, the shortfall power calculation module further includes a elimination unit;

[0049] The elimination unit is configured to determine and eliminate invalid combinations in the operation mode combinations based on the operation mode of the unit after calling the operation mode combination unit and before calling the power shortage interval calculation unit;

[0050] The invalid combination includes units in pumping operation mode and units in power generation operation mode.

[0051] Preferably, the power shortage interval calculation unit is specifically used to:

[0052] Based on the rated power and mechanical oscillation interval of the units, the computer unit operates in a power deficit interval of each unit during power generation;

[0053] Based on the power shortage intervals of each unit when the unit operation mode is power generation, the power shortage intervals of the operation mode combination when the unit operation mode includes the unit in the power generation operation mode are calculated.

[0054] Preferably, the construction of the power objective function includes:

[0055] With the goal of making up for the maximum power shortage, with the constraint of improving the power regulation flexibility of the power station, with the maximum power shortage as input, and with the rated power and capacity of the electrochemical energy storage to be configured in the power station as output, it is constructed by setting the capacity coefficient.

[0056] Preferably, the power objective function is expressed as follows:

[0057]

[0058] E ES,max =bP ES,max

[0059] Where, P ES,max is the rated power of the electrochemical energy storage, is the rated power of the sth unit, a s is the power shortage interval of the sth unit, b is the capacity factor, E ES,max is the capacity of the electrochemical energy storage, and S is the total number of the units.

[0060] Preferably, the construction of the cost objective function includes:

[0061] The system is constructed with the goal of minimizing the total power regulation cost of the power station and the electrochemical energy storage, the rated power and capacity of the electrochemical energy storage as input, and the real-time power of the electrochemical energy storage and each unit as output, by setting the operating constraints of the electrochemical energy storage and the units.

[0062] Preferably, the operating mode constraint of the electrochemical energy storage is expressed as follows:

[0063]

[0064] Where, is the charging state parameter of the electrochemical energy storage at time t, is the discharge state parameter of the electrochemical energy storage at time t, P ES,max is the rated power of the electrochemical energy storage, P ES (t) is the power of the electrochemical energy storage at time t, E ES (t) is the capacity of the electrochemical energy storage at time t, E ES (t-1) is the capacity of the electrochemical energy storage at time t-1, η ES is the energy storage efficiency of the electrochemical energy storage, SOC min The minimum state of charge of the electrochemical energy storage, SOC max is the maximum state of charge of the electrochemical energy storage, EES,max is the capacity of the electrochemical energy storage, and is a (0, 1) variable.

[0065] Preferably, the operating mode constraint of the unit is expressed as follows:

[0066]

[0067] U SG (t)+U SP (t)≤1

[0068] P G,s (t) = P GG,s (t)+P GP,s (t)

[0069] Where, P GG,s (t) is the power of the sth unit at time t when it is in the power generation state, is the lower power limit of the sth unit in the low power range under power generation status, is the lower power limit of the sth unit in the high power range under power generation status, is the upper limit of the power of the sth unit in the low power range under the power generation state, is the upper limit of the power of the sth unit in the high power range under the power generation state, is the state parameter of the sth unit in the low power range at time t, is the state parameter of the sth unit in the high power range at time t, U GG,s (t) is the state parameter of the sth unit under power generation at time t, P GP,s (t) is the power of the sth unit at the moment t under the pumping state, is the rated power of the sth unit in the pumping state, U GP,s (t) is the state parameter of the sth unit in the pumping state at time t, S is the total number of units, U SG (t) is the state parameter of all units in the power generation state at time t, U SP (t) is the state parameter of all units in the pumping state at time t, P G,s (t) is the power of the sth unit at time t, U GG,s (t), U GP,s (t), U SG (t) and U SP (t) are all (0, 1) variables.

[0070] In another aspect, the present application further provides an electronic device, comprising: at least one processor and a memory; the memory and the processor are connected via a bus;

[0071] The memory is used to store one or more programs;

[0072] When the one or more programs are executed by the at least one processor, a method for improving the power adjustable capacity of pumped storage as described above is implemented.

[0073] On the other hand, the present application also provides a readable storage medium having an execution program stored thereon. When the execution program is executed, a method for improving the power adjustable capacity of pumped storage as described above is implemented.

[0074] Compared with the prior art, the present invention has the following beneficial effects:

[0075] The present invention provides a method, system, equipment and medium for improving the power adjustable capacity of pumped storage power, including: based on the operating mode, rated power and mechanical oscillation range of the units in the pumped storage power station, determining the maximum power shortage of the power station under different combinations of unit operating modes; based on the maximum power shortage, using a pre-constructed power objective function to calculate the rated power and capacity of the electrochemical energy storage to be configured in the power station; based on the rated power and capacity of the electrochemical energy storage, using a pre-constructed cost objective function to calculate the real-time power adjustment range of the electrochemical energy storage and each unit to improve the power adjustable capacity of the pumped storage power station; wherein, the power objective function is constructed with the goal of making up for the maximum power shortage; and the cost objective function is constructed with the goal of minimizing the total power adjustment cost of the power station and the electrochemical energy storage. The present invention determines the maximum power shortage of the power station under different combinations of unit operating modes based on the mechanical oscillation range and operating mode of the units in the pumped storage power station, and uses the power objective function to calculate the rated power and capacity of the electrochemical energy storage that the unit should be configured with, with the goal of making up for the maximum power shortage. By introducing electrochemical energy storage on the basis of existing pumped storage, the operating flexibility of the pumped storage unit can be significantly improved, the power adjustment range can be broadened in both directions, the number of short-term start-up and shutdown of the pumped storage unit can be reduced, the operating loss of the pumped storage can be effectively reduced, and the defect of reduced adjustable capacity of the pumped storage due to avoiding the oscillation range can be overcome, thereby achieving an improvement in the adjustable capacity of the pumped storage power. The present invention takes the minimization of the total cost of power adjustment as the goal, and uses the cost objective function to calculate the real-time power adjustment range of the electrochemical energy storage and each unit. According to the real-time power adjustment range, the operation optimization and capacity planning of the electrochemical energy storage and pumped storage can be carried out. BRIEF DESCRIPTION OF THE DRAWINGS

[0076] Figure 1 This is a flow chart of a method for improving the power adjustable capacity of pumped storage according to the present invention;

[0077] Figure 2 This is a schematic structural diagram of a pumped storage power adjustable capacity enhancement system according to the present invention;

[0078] Figure 3 The figure is a schematic structural diagram of an electronic device of the present invention. DETAILED DESCRIPTION

[0079] Energy storage, as an important support for the stable operation of new energy grid connection, has outstanding advantages in load smoothing, peak shaving and valley filling, reducing power supply costs, and improving system stability. Pumped storage devices, among others, have a problem of severely reduced adjustability when avoiding mechanical oscillation intervals. Electrochemical energy storage facilities, represented by lithium batteries, have the advantages of fast response speed and high adjustment accuracy. Research shows that combining pumped storage and electrochemical energy storage to construct a hybrid energy storage system can utilize their complementary characteristics to improve the overall performance of the system. Introducing electrochemical energy storage on the basis of existing pumped storage power stations can broaden the power adjustment range in both directions, thereby improving the power adjustability of pumped storage.

[0080] In order to better understand the present invention, the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0081] Example 1:

[0082] A method for improving the adjustable power capacity of pumped storage, the flow chart of which is as follows: Figure 1 Shown, including:

[0083] Step 1: Based on the operating mode, rated power, and mechanical oscillation range of the units in the pumped storage power station, determine the maximum power shortage of the power station under different combinations of unit operating modes;

[0084] Step 2: Based on the maximum power shortfall, the rated power and capacity of the electrochemical energy storage to be configured in the power station are calculated using a pre-established power objective function;

[0085] Step 3: Based on the rated power and capacity of the electrochemical energy storage, a pre-established cost objective function is used to calculate the real-time power regulation range of the electrochemical energy storage and each unit to improve the power regulation capability of the pumped storage power station;

[0086] The power objective function is constructed with the goal of making up for the maximum power deficit; and the cost objective function is constructed with the goal of minimizing the total power regulation cost of the power station and electrochemical energy storage.

[0087] Step 1 specifically includes:

[0088] Determining an operating mode combination of the units in the power plant based on the operating modes of the units;

[0089] Assume that there are m units in the power station, and each unit has three operating modes: power generation, pumping, and shutdown. If the rated power of the unit is Different, there are at most 3 m If there are no differences between the units, invalid combinations are deleted. For example, if there are units operating in both pumping mode and generating mode, or repeated operating mode combinations, then m identical units correspond to 2m+1 combinations.

[0090] 0 represents that the unit's operating mode is shutdown, -1 represents that the unit's operating mode is pumping, and 1 represents that the unit's operating mode is power generation. Then one unit corresponds to three operating modes: 0, 1, and -1; two units correspond to nine combinations: (0, 0), (0, 1), (1, 0), (0, -1), (-1, 0), (1, 1), (-1, -1), (-1, 1), and (1, -1). After removing the combinations of units with both pumping operation mode and power generation operation mode, there are seven combinations left: (0, 0), (0, 1), (1, 0), (0, -1), (-1, 0), (1, 1), and (-1, -1). If two units are the same, the repeated operation mode combinations are eliminated, leaving five combinations: (0, 0), (0, 1), (-1, 0), (1, 1), and (-1, -1).

[0091] Calculating the power shortage interval of each operating mode combination based on the rated power and mechanical oscillation interval of the unit; and determining the maximum shortage power as the maximum value of the power shortage interval of each combination;

[0092] Considering that the mechanical oscillation center of the unit is located at 40% and 80% of the rated power in the power generation mode, the specific mechanical oscillation center varies slightly depending on the model of the unit. The unit needs to avoid the oscillation center in the power generation mode. Therefore, each unit has 4 operating intervals: Power generation, Pumping and shutdown. For half power generation, = is the full power generation range. Including the two power generation states, the same m units can have a maximum of 2m+1+m(m+1) / 2 state combinations, that is, two identical units correspond to 8 operating mode combinations.

[0093] According to the experiment, except for the case where the power is less than the minimum operating power The maximum range of power shortage is The maximum interval length of the power shortage is When a pumped storage power station is equipped with S identical pumped storage units, it can be considered that when the S units generate electricity simultaneously, a maximum power shortage interval is generated, and the maximum power shortage interval also occurs in The maximum interval length of the power shortage is So when configuring After the electrochemical energy storage power is increased, the pumped storage power station can operate in the full power range.

[0094] Assuming that the rated power of the unit is 300MW, the possible power range of the unit is -300MW for pumping, 0MW for shutdown, [165, 195]MW for power generation, and [285, 315]MW for power generation. When a unit is currently in the -300MW pumping operation mode (the power of the unit cannot be adjusted in the pumping state), the operating range at the next moment may be -300MW, 0MW, [165, 195]MW, [285, 315]MW, and the corresponding power adjustment range is 0MW, 300MW, [465, 495]MW, [585, 615]MW; if two identical units are both in the -300MW pumping operation mode, the operating range at the next moment may be -600MW, -300MW, [165, 195]MW, [285, 315]MW, [330, 390 ]MW, [450, 510]MW, [570, 630]MW, and the corresponding power adjustment range is 0MW, 300MW, [765, 795]MW, [885, 915]MW, [930, 990]MW, [1050, 1110]MW, [1170, 1230]MW; if the three identical units are all in the -300MW pumping operation mode, the operating range at the next moment may be -900MW, -600MW, -300MW, [165, 195]MW, [285, 315]MW, [330, 390]MW, [450, 510]MW, [495, 585]MW, [570, 630]MW, [615, 705]MW, [735, 825]MW, [855, 945]MW.

[0095] Since the power cannot be adjusted during shutdown and pumping operation, it is only necessary to calculate the power shortage range of the operation mode combination when the unit includes the power generation operation mode.

[0096] In order to calculate the power shortage interval of the operating mode combination, the power objective function is constructed:

[0097] The power objective function aims to make up for the maximum power shortfall, takes improving the power regulation flexibility of the power station as a constraint, takes the maximum power shortfall as input, and takes the rated power and capacity of the electrochemical energy storage to be configured in the power station as output, and is constructed by setting a capacity factor.

[0098] The power objective function is expressed as follows:

[0099]

[0100] E ES,max =bP ES,max

[0101] Where, P ES,max is the rated power of the electrochemical energy storage, is the rated power of the sth unit, a s is the power shortage interval of the sth unit, That is, the maximum shortfall power, b is the capacity factor, E ES,max is the capacity of the electrochemical energy storage, and S is the total number of the units. In this embodiment, the s units are all identical units, so a s The value is 0.95-0.65=0.3, and the value of b is 2, which means adjustment within 2 power ranges.

[0102] To calculate the real-time power regulation range of electrochemical energy storage and each unit, this embodiment constructs a cost objective function:

[0103] The cost objective function aims to minimize the total cost of power regulation of the power station and the electrochemical energy storage, takes the rated power and capacity of the electrochemical energy storage as input, and takes the real-time power of the electrochemical energy storage and each unit as output, and is constructed by setting operating constraints of the electrochemical energy storage and the units.

[0104] The cost objective function is expressed as follows:

[0105] C=min(C ES +C G +C B )

[0106] Where C is the total cost of power regulation, C ES is the power regulation cost of the electrochemical energy storage, C G is the total power regulation cost of the unit, C B Penalty cost for adjusting power imbalance.

[0107] The power regulation cost C of the electrochemical energy storage ES , expressed as follows:

[0108]

[0109] Where c ES is the unit power regulation cost of the electrochemical energy storage, P ES (t) is the power of the electrochemical energy storage at time t, and T is the total duration;

[0110] The total power regulation cost of the unit is C G , expressed as follows:

[0111]

[0112] Where c G,s is the unit power regulation cost of the sth unit, P G,s (t) is the power of the sth unit at time t, and S is the total number of units;

[0113] The power imbalance penalty cost C B , expressed as follows:

[0114]

[0115] Where c B is the unit power regulation cost of unbalanced power, P AGC (t) is the automatic power generation control power received by the power station where the unit is located at time t.

[0116] The operating mode constraints of the electrochemical energy storage are expressed as follows:

[0117]

[0118] Where, is the charging state parameter of the electrochemical energy storage at time t, is the discharge state parameter of the electrochemical energy storage at time t, P ES,max is the rated power of the electrochemical energy storage, P ES (t) is the power of the electrochemical energy storage at time t, E ES (t) is the capacity of the electrochemical energy storage at time t, E ES (t-1) is the capacity of the electrochemical energy storage at time t-1, η ES is the energy storage efficiency of the electrochemical energy storage, SOC min The minimum state of charge of the electrochemical energy storage, SOC max is the maximum state of charge of the electrochemical energy storage, E ES,max is the capacity of the electrochemical energy storage, and The operation mode constraints of the electrochemical energy storage are, from top to bottom, electrochemical energy storage operation state constraints, simultaneous charging and discharging are not allowed, power constraints, and energy constraints.

[0119] The operating mode constraint of the unit is expressed as follows:

[0120]

[0121] Where, P GG,s (t) is the power of the sth unit at time t when it is in the power generation state, is the lower power limit of the sth unit in the low power range under power generation status, is the lower power limit of the sth unit in the high power range under power generation status, is the upper limit of the power of the sth unit in the low power range under the power generation state, is the upper limit of the power of the sth unit in the high power range under the power generation state, is the state parameter of the sth unit in the low power range at time t, is the state parameter of the sth unit in the high power range at time t, U GG,s (t) is the state parameter of the sth unit under power generation at time t, P GP,s (t) is the power of the sth unit at the moment t under the pumping state, is the rated power of the sth unit in the pumping state, U GP,s (t) is the state parameter of the sth unit in the pumping state at time t, S is the total number of units, U SG (t) is the state parameter of all units in the power generation state at time t, U SP (t) is the state parameter of all units in the pumping state at time t, P G,s (t) is the power of the sth unit at time t, U GG,s (t), U GP,s (t), U SG (t) and U SP (t) are all (0, 1) variables;

[0122] Among them, (1) is the operating power constraint to avoid the mechanical oscillation range, which can be adjusted within two power ranges in the power generation state; (2) is the power non-adjustable constraint during pumping; formula (3) is the pumped storage operation logic constraint, that is, it is not allowed to contain units in pumping operation mode and units in power generation operation mode at the same time.

[0123] According to the two objective functions, the power of the configured electrochemical energy storage is calculated. If 100MW of electrochemical energy storage is configured, then under the ideal state of ignoring its capacity limitation, the adjustment range of the two units is [-700, -500]MW, [-400, -200]MW, [65, 295]MW, [85, 415]MW, [230, 490]MW, [350, 610]MW, [470, 730]MW, and after merging, it is [-700, -500]MW, [-400, -200]MW, [65, 730]MW; if the three identical units are all operating in the -300MW pumping mode, the next The current operating range is [-1000, -800]MW, [-700, -500]MW, [-400, -200]MW, [65, 295]MW, [185, 415]MW, [230, 490]MW, [350, 610]MW, [395, 685]MW, [470, 730]MW, [515, 805]MW, [635, 925]MW, and [755, 1045]MW. After merging, the range becomes [-1000, -800]MW, [-700, -500]MW, [-400, -200]MW, and [65, 730]MW. Therefore, introducing electrochemical energy storage into existing pumped-storage power stations can broaden the power regulation range in both directions, thereby improving the adjustability of the power station.

[0124] The present invention determines the power deficit based on the power regulation characteristics of the units in the pumped-storage power station, the mechanical oscillation range of the units, and the combination of the unit's operating mode. With the goal of making up for the maximum power deficit, electrochemical energy storage is configured for pumped storage, and with the goal of minimizing the total power regulation cost of pumped storage and electrochemical energy storage, the operation optimization and capacity planning of electrochemical energy storage and pumped storage are performed. By introducing electrochemical energy storage on the basis of existing pumped storage, the regulation potential of the pumped-storage power station is fully tapped with the help of electrochemical energy storage, which can significantly improve the operational flexibility of the pumped-storage units, bidirectionally broaden the power regulation range, reduce the number of short-term starts and stops of the pumped-storage units, effectively reduce the operating losses of the pumped-storage units, overcome the defect of reduced adjustability of pumped storage due to avoiding the oscillation range, and achieve an improvement in the power adjustability of pumped storage, which is conducive to improving the economic efficiency of pumped storage and electrochemical storage in providing power support services to the power system.

[0125] Example 2:

[0126] The present invention based on the same inventive concept also provides a pumped storage power adjustable capacity improvement system, the structural diagram of which is shown in FIG. Figure 2 As shown, it includes: a shortage power calculation module, an electrochemical energy storage configuration calculation module and an adjustable capacity improvement calculation module;

[0127] The shortfall power calculation module is configured to determine the maximum shortfall power of the pumped storage power station under different combinations of unit operating modes based on the operating mode, rated power, and mechanical oscillation range of the units in the pumped storage power station;

[0128] The electrochemical energy storage configuration calculation module is used to calculate the rated power and capacity of the electrochemical energy storage to be configured for the power station based on the maximum power shortage using a pre-established power objective function;

[0129] The adjustable capacity improvement calculation module is used to calculate the real-time power adjustment range of the electrochemical energy storage and each unit based on the rated power and capacity of the electrochemical energy storage using a pre-established cost objective function to improve the power adjustable capacity of the pumped storage power station;

[0130] The power objective function is constructed with the goal of making up for the maximum power deficit; and the cost objective function is constructed with the goal of minimizing the total power regulation cost of the power station and electrochemical energy storage.

[0131] Furthermore, the power shortage calculation module includes: an operation mode combination unit, a power shortage interval calculation unit and a maximum power shortage calculation unit;

[0132] The operation mode combination unit is used to determine the operation mode combination of the units in the power station based on the operation mode of the units;

[0133] The power shortage interval calculation unit is used to calculate the power shortage interval of each operation mode combination based on the rated power and mechanical oscillation interval of the unit;

[0134] The maximum shortfall power calculation unit is configured to determine the maximum shortfall power using the maximum value of the power shortfall intervals of each combination;

[0135] The mechanical oscillation range of each unit is determined based on the model of each unit.

[0136] Furthermore, the operation modes of the unit include shutdown, pumping and power generation.

[0137] Furthermore, the shortfall power calculation module further includes a elimination unit;

[0138] The elimination unit is configured to determine and eliminate invalid combinations in the operation mode combinations based on the operation mode of the unit after calling the operation mode combination unit and before calling the power shortage interval calculation unit;

[0139] The invalid combination includes units in pumping operation mode and units in power generation operation mode.

[0140] Furthermore, the power shortage interval calculation unit is specifically used to:

[0141] Based on the rated power and mechanical oscillation interval of the units, the computer unit operates in a power deficit interval of each unit during power generation;

[0142] Based on the power shortage intervals of each unit when the unit operation mode is power generation, the power shortage intervals of the operation mode combination when the unit operation mode includes the unit in the power generation operation mode are calculated.

[0143] Furthermore, the construction of the power objective function includes:

[0144] With the goal of making up for the maximum power shortage, with the constraint of improving the power regulation flexibility of the power station, with the maximum power shortage as input, and with the rated power and capacity of the electrochemical energy storage to be configured in the power station as output, it is constructed by setting the capacity coefficient.

[0145] Furthermore, the power objective function is expressed as follows:

[0146]

[0147] E ES,max =bP ES,max

[0148] Where, P ES,max is the rated power of the electrochemical energy storage, is the rated power of the sth unit, a s is the power shortage interval of the sth unit, b is the capacity factor, E ES,max is the capacity of the electrochemical energy storage, and S is the total number of the units.

[0149] Furthermore, the construction of the cost objective function includes:

[0150] The system is constructed with the goal of minimizing the total power regulation cost of the power station and the electrochemical energy storage, the rated power and capacity of the electrochemical energy storage as input, and the real-time power of the electrochemical energy storage and each unit as output, by setting the operating constraints of the electrochemical energy storage and the units.

[0151] Furthermore, the operating mode constraint of the electrochemical energy storage is expressed as follows:

[0152]

[0153] Where, is the charging state parameter of the electrochemical energy storage at time t, is the discharge state parameter of the electrochemical energy storage at time t, P ES,max is the rated power of the electrochemical energy storage, PES (t) is the power of the electrochemical energy storage at time t, E ES (t) is the capacity of the electrochemical energy storage at time t, E ES (t-1) is the capacity of the electrochemical energy storage at time t-1, η ES is the energy storage efficiency of the electrochemical energy storage, SOC min The minimum state of charge of the electrochemical energy storage, SOC max is the maximum state of charge of the electrochemical energy storage, E ES,max is the capacity of the electrochemical energy storage, and is a (0, 1) variable.

[0154] Furthermore, the operating mode constraint of the unit is expressed as follows:

[0155]

[0156] U SG (t)+U SP (t)≤1

[0157] P G,s (t) = P GG,s (t)+P GP,s (t)

[0158] Where, P GG,s (t) is the power of the sth unit at time t when it is in the power generation state, is the lower power limit of the sth unit in the low power range under power generation status, is the lower power limit of the sth unit in the high power range under power generation status, is the upper limit of the power of the sth unit in the low power range under the power generation state, is the upper limit of the power of the sth unit in the high power range under the power generation state, is the state parameter of the sth unit in the low power range at time t, is the state parameter of the sth unit in the high power range at time t, U GG,s (t) is the state parameter of the sth unit under power generation at time t, P GP,s (t) is the power of the sth unit at the moment t under the pumping state, is the rated power of the sth unit in the pumping state, U GP,s (t) is the state parameter of the sth unit in the pumping state at time t, S is the total number of units, U SG (t) is the state parameter of all units in the power generation state at time t, U SP (t) is the state parameter of all units in the pumping state at time t, PG,s (t) is the power of the sth unit at time t, U GG,s (t), U GP,s (t), U SG (t) and U SP (t) are all (0, 1) variables.

[0159] The system provided in this embodiment determines the maximum power shortage of the power station under different combinations of unit operating modes based on the mechanical oscillation interval and operating mode of the units in the pumped storage power station, with the goal of making up for the maximum power shortage, and uses the power objective function to calculate the rated power and capacity of the electrochemical energy storage that the unit should be configured with. By introducing electrochemical energy storage on the basis of existing pumped storage, it can significantly improve the operating flexibility of the pumped storage unit, bidirectionally widen the power adjustment range, reduce the number of short-term start-up and shutdown of the pumped storage unit, effectively reduce the operating loss of the pumped storage, overcome the defect of reduced adjustable capacity of the pumped storage due to avoiding the oscillation interval, and realize the improvement of the adjustable capacity of the pumped storage power. The present invention takes the minimum total cost of power regulation as the goal, uses the cost objective function to calculate the real-time power adjustment range of the electrochemical energy storage and each unit, and can perform operation optimization and capacity planning of the electrochemical energy storage and pumped storage based on the real-time power adjustment range.

[0160] Example 3

[0161] like Figure 3 As shown, the present invention also provides an electronic device, which may be a computer, a single-chip microcomputer, a smart mobile device, or the like. The electronic device in this embodiment may include a processor, a memory, a transceiver component, and the like. The memory, processor, and transceiver component are connected via a bus; the memory may be used to store an execution program, which may include instructions; and the processor may be used to execute the instructions stored in the memory. The memory may also be used to store data, which may be accessed and / or modified during the execution of the instructions.

[0162] The processor may be a central processing unit (CPU), or it may be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. It is the computing core and control core of the terminal, which is suitable for implementing one or more instructions, specifically suitable for loading and executing one or more instructions in the storage medium to implement the corresponding method flow or corresponding function, so as to realize the steps of a method for improving the adjustable power capacity of pumped storage in the above embodiment.

[0163] The electronic device provided in this embodiment implements the steps of a method for improving the adjustable power capacity of pumped storage power. Based on the mechanical oscillation range and operating mode of the units in the pumped storage power station, the maximum power shortage of the power station under different combinations of unit operating modes is determined. With the goal of making up for the maximum power shortage, the rated power and capacity of the electrochemical energy storage that the computer unit should be configured with are calculated using a power objective function. By introducing electrochemical energy storage on the basis of existing pumped storage, the operating flexibility of the pumped storage unit can be significantly improved, the power adjustment range can be broadened in both directions, the number of short-term start-up and shutdown of the pumped storage unit can be reduced, the operating loss of the pumped storage can be effectively reduced, and the defect of reduced adjustable capacity of the pumped storage due to avoiding the oscillation range can be overcome, thereby achieving the improvement of the adjustable power capacity of the pumped storage power. The cost objective function is used to calculate the real-time power adjustment range of the electrochemical energy storage and each unit. Based on the real-time power adjustment range, the operation optimization and capacity planning of the electrochemical energy storage and pumped storage can be carried out.

[0164] Example 4

[0165] Based on the same inventive concept, the present invention also provides a readable storage medium, specifically an electronic device readable storage medium (Memory), which is a memory device in an electronic device for storing programs and data. It can be understood that the storage medium here can include both built-in storage media in the electronic device and, of course, extended storage media supported by the electronic device. The storage medium provides a storage space, which stores the operating system of the terminal. In addition, one or more instructions suitable for being loaded and executed by the processor are also stored in the storage space. These instructions can be one or more execution programs (including program codes). It should be noted that the storage medium here can be a high-speed RAM memory or a non-volatile memory (non-volatile memory), such as at least one disk memory. The processor loads and executes one or more instructions stored in the storage medium, which can realize a step of improving the adjustable power capacity of pumped storage in the above embodiment.

[0166] The electronic device provided in this embodiment implements the steps of a method for improving the adjustable power capacity of pumped storage power. Based on the mechanical oscillation range and operating mode of the units in the pumped storage power station, the maximum power shortage of the power station under different combinations of unit operating modes is determined. With the goal of making up for the maximum power shortage, the rated power and capacity of the electrochemical energy storage that the computer unit should be configured with are calculated using a power objective function. By introducing electrochemical energy storage on the basis of existing pumped storage, the operating flexibility of the pumped storage unit can be significantly improved, the power adjustment range can be broadened in both directions, the number of short-term start-up and shutdown of the pumped storage unit can be reduced, the operating loss of the pumped storage can be effectively reduced, and the defect of reduced adjustable capacity of the pumped storage due to avoiding the oscillation range can be overcome, thereby achieving the improvement of the adjustable power capacity of the pumped storage power. The cost objective function is used to calculate the real-time power adjustment range of the electrochemical energy storage and each unit. Based on the real-time power adjustment range, the operation optimization and capacity planning of the electrochemical energy storage and pumped storage can be carried out.

[0167] It will be understood by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Thus, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0168] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowcharts and / or block diagrams, as well as combinations of processes and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowcharts and / or block diagrams. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0169] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0170] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0171] The above are merely embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are included in the scope of the claims of the present invention to be approved.

Claims

1. A method for improving the power adjustable capacity of pumped storage, characterized in that: include: Determining the maximum power deficit of the pumped storage power station under different combinations of unit operating modes based on the operating modes, rated powers, and mechanical oscillation ranges of the units in the pumped storage power station; Based on the maximum power shortage, a pre-established power objective function is used to calculate the rated power and capacity of the electrochemical energy storage that should be configured for the power station; Based on the rated power and capacity of the electrochemical energy storage, a pre-established cost objective function is used to calculate the real-time power regulation range of the electrochemical energy storage and each unit to improve the power regulation capability of the pumped storage power station; The power objective function is constructed with the goal of making up for the maximum power deficit; and the cost objective function is constructed with the goal of minimizing the total power regulation cost of the power station and electrochemical energy storage.

2. The method according to claim 1, wherein The determining, based on the operating mode, rated power, and mechanical oscillation range of the units in the pumped storage power station, of the maximum power shortage of the power station under different combinations of operating modes of the units includes: Determining an operating mode combination of the units in the power plant based on the operating modes of the units; Calculate the power shortage interval of each operating mode combination based on the rated power and mechanical oscillation interval of the unit; Determining the maximum power shortage according to the maximum value of the power shortage intervals of each combination; The mechanical oscillation range of each unit is determined based on the model of each unit.

3. The method according to claim 2, wherein The operation modes of the unit include shutdown, pumping and power generation.

4. The method according to claim 3, wherein After determining the operating mode combination of the units in the power station based on the operating mode of the units, and before respectively calculating the power shortage interval of each operating mode combination based on the rated power and mechanical oscillation interval of the units, the method further includes: Based on the operating mode of the unit, determining invalid combinations among the operating mode combinations and eliminating them; The invalid combination includes units in pumping operation mode and units in power generation operation mode.

5. The method according to claim 4, wherein The power shortage interval of each operation mode combination is calculated based on the rated power and mechanical oscillation interval of the unit, including: Based on the rated power and mechanical oscillation interval of the units, the computer unit operates in a power deficit interval of each unit during power generation; Based on the power shortage intervals of each unit when the unit operation mode is power generation, the power shortage intervals of the operation mode combination when the unit operation mode includes the unit in the power generation operation mode are calculated.

6. The method according to claim 1, wherein The construction of the power objective function includes: With the goal of making up for the maximum power shortage, with the constraint of improving the power regulation flexibility of the power station, with the maximum power shortage as input, and with the rated power and capacity of the electrochemical energy storage to be configured in the power station as output, it is constructed by setting the capacity coefficient.

7. The method according to claim 6, wherein The power objective function is expressed as follows: E ES,max =bP ES,max Where, P ES,max is the rated power of the electrochemical energy storage, is the rated power of the sth unit, a s is the power shortage interval of the sth unit, b is the capacity factor, E ES,max is the capacity of the electrochemical energy storage, and S is the total number of the units.

8. The method according to claim 1, wherein The construction of the cost objective function includes: The system is constructed with the goal of minimizing the total power regulation cost of the power station and the electrochemical energy storage, the rated power and capacity of the electrochemical energy storage as input, and the real-time power of the electrochemical energy storage and each unit as output, by setting the operating constraints of the electrochemical energy storage and the units.

9. The method according to claim 8, wherein The operating mode constraints of the electrochemical energy storage are expressed as follows: Where, is the charging state parameter of the electrochemical energy storage at time t, is the discharge state parameter of the electrochemical energy storage at time t, P ES,max is the rated power of the electrochemical energy storage, P ES (t) is the power of the electrochemical energy storage at time t, E ES (t) is the capacity of the electrochemical energy storage at time t, E ES (t-1) is the capacity of the electrochemical energy storage at time t-1, η ES is the energy storage efficiency of the electrochemical energy storage, SOC min The minimum state of charge of the electrochemical energy storage, SOC max is the maximum state of charge of the electrochemical energy storage, E ES,max is the capacity of the electrochemical energy storage, and is a (0, 1) variable.

10. The method according to claim 8, wherein The operating mode constraint of the unit is expressed as follows: U SG (t)+U SP (t)≤1 P G,s (t)=P GG,s (t)+P GP,s (t) Where, P GG,s (t) is the power of the sth unit at time t when it is in the power generation state, is the lower power limit of the sth unit in the low power range under power generation status, is the lower power limit of the sth unit in the high power range under power generation status, is the upper limit of the power of the sth unit in the low power range under the power generation state, is the upper limit of the power of the sth unit in the high power range under the power generation state, is the state parameter of the sth unit in the low power range at time t, is the state parameter of the sth unit in the high power range at time t, U GG,s (t) is the state parameter of the sth unit under power generation at time t, P GP,s (t) is the power of the sth unit at time t under the pumping state, is the rated power of the sth unit in the pumping state, U GP,s (t) is the state parameter of the sth unit in the pumping state at time t, S is the total number of the units, U SG (t) is the state parameter of all units in the power generation state at time t, U SP (t) is the state parameter of all units in the pumping state at time t, P G,s (t) is the power of the sth unit at time t, U GG,s (t), U GP,s (t), U SG (t) and U SP (t) are all (0, 1) variables.

11. A pumped storage power adjustable capacity enhancement system, characterized in that: include: Deficit power calculation module, electrochemical energy storage configuration calculation module and adjustable capacity improvement calculation module; The shortfall power calculation module is configured to determine the maximum shortfall power of the pumped storage power station under different combinations of unit operating modes based on the operating mode, rated power, and mechanical oscillation range of the units in the pumped storage power station; The electrochemical energy storage configuration calculation module is used to calculate the rated power and capacity of the electrochemical energy storage to be configured in the power station based on the maximum power shortage using a pre-established power objective function; The adjustable capacity improvement calculation module is used to calculate the real-time power adjustment range of the electrochemical energy storage and each unit based on the rated power and capacity of the electrochemical energy storage using a pre-established cost objective function to improve the power adjustable capacity of the pumped storage power station; The power objective function is constructed with the goal of making up for the maximum power deficit; and the cost objective function is constructed with the goal of minimizing the total power regulation cost of the power station and electrochemical energy storage.

12. The system according to claim 11, wherein The power shortage calculation module includes: an operation mode combination unit, a power shortage interval calculation unit and a maximum power shortage calculation unit; The operation mode combination unit is used to determine the operation mode combination of the units in the power station based on the operation mode of the units; The power shortage interval calculation unit is used to calculate the power shortage interval of each operation mode combination based on the rated power and mechanical oscillation interval of the unit; The maximum shortfall power calculation unit is configured to determine the maximum shortfall power based on the maximum value of the power shortfall intervals of each combination; The mechanical oscillation range of each unit is determined based on the model of each unit.

13. The system according to claim 12, wherein: The operation modes of the unit include shutdown, pumping and power generation.

14. The system according to claim 13, wherein: The shortage power calculation module further includes a elimination unit; The elimination unit is configured to determine and eliminate invalid combinations in the operation mode combinations based on the operation mode of the unit after calling the operation mode combination unit and before calling the power shortage interval calculation unit; The invalid combination includes units in pumping operation mode and units in power generation operation mode.

15. The system according to claim 14, wherein: The power shortage interval calculation unit is specifically used for: Based on the rated power and mechanical oscillation interval of the units, the computer unit operates in a power deficit interval of each unit during power generation; Based on the power shortage intervals of each unit when the unit operation mode is power generation, the power shortage intervals of the operation mode combination when the unit operation mode includes the unit in the power generation operation mode are calculated.

16. The system of claim 11, wherein: The construction of the power objective function includes: With the goal of making up for the maximum power shortage, with the constraint of improving the power regulation flexibility of the power station, with the maximum power shortage as input, and with the rated power and capacity of the electrochemical energy storage to be configured in the power station as output, it is constructed by setting the capacity coefficient.

17. The system according to claim 16, wherein: The power objective function is expressed as follows: E ES,max =bP ES,max Where, P ES,max is the rated power of the electrochemical energy storage, is the rated power of the sth unit, a s is the power shortage interval of the sth unit, b is the capacity factor, E ES,max is the capacity of the electrochemical energy storage, and S is the total number of the units.

18. The system of claim 11, wherein: The construction of the cost objective function includes: The system is constructed with the goal of minimizing the total power regulation cost of the power station and the electrochemical energy storage, the rated power and capacity of the electrochemical energy storage as input, and the real-time power of the electrochemical energy storage and each unit as output, by setting the operating constraints of the electrochemical energy storage and the units.

19. The system of claim 18, wherein: The operating mode constraints of the electrochemical energy storage are expressed as follows: Where, is the charging state parameter of the electrochemical energy storage at time t, is the discharge state parameter of the electrochemical energy storage at time t, P ES,max is the rated power of the electrochemical energy storage, P ES (t) is the power of the electrochemical energy storage at time t, E ES (t) is the capacity of the electrochemical energy storage at time t, E ES (t-1) is the capacity of the electrochemical energy storage at time t-1, η ES is the energy storage efficiency of the electrochemical energy storage, SOC min The minimum state of charge of the electrochemical energy storage, SOC max is the maximum state of charge of the electrochemical energy storage, E ES,max is the capacity of the electrochemical energy storage, and is a (0, 1) variable.

20. The system of claim 18, wherein: The operating mode constraint of the unit is expressed as follows: U SG (t)+U SP (t)≤1 P G,s (t)=P GG,s (t)+P GP,s (t) Where, P GG,s (t) is the power of the sth unit at time t when it is in the power generation state, is the lower power limit of the sth unit in the low power range under power generation status, is the lower power limit of the sth unit in the high power range under power generation status, is the upper limit of the power of the sth unit in the low power range under the power generation state, is the upper limit of the power of the sth unit in the high power range under the power generation state, is the state parameter of the sth unit in the low power range at time t, is the state parameter of the sth unit in the high power range at time t, U GG,s (t) is the state parameter of the sth unit under power generation at time t, P GP,s (t) is the power of the sth unit at time t under the pumping state, is the rated power of the sth unit in the pumping state, U GP,s (t) is the state parameter of the sth unit in the pumping state at time t, S is the total number of the units, U SG (t) is the state parameter of all units in the power generation state at time t, U SP (t) is the state parameter of all units in the pumping state at time t, P G,s (t) is the power of the sth unit at time t, U GG,s (t), U GP,s (t), U SG (t) and U SP (t) are all (0, 1) variables.

21. An electronic device, characterized in that: include: at least one processor and memory; The memory and the processor are connected via a bus; The memory is used to store one or more programs; When the one or more programs are executed by the at least one processor, a method for improving the power adjustable capacity of pumped storage as claimed in any one of claims 1 to 10 is implemented.

22. A readable storage medium, characterized in that An execution program is stored thereon, and when the execution program is executed, a method for improving the power adjustable capacity of pumped storage as described in any one of claims 1 to 10 is implemented.

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