New energy station and energy storage power station group control and group scheduling method and system

Abstract

The invention relates to the technical field of novel power system collaborative optimization, in particular to a new energy station and energy storage power station group control and group adjustment method and system, and the method comprises the steps: building a new energy station adjustable capability model and an energy storage adjustable capability model, and calculating the adjustable capability of the new energy station and energy storage; calculating power vacancy according to the power generation plan curve of the new energy pooling station and the actual power generation output, and adjusting the power generation output of the new energy station and the stored energy through an output distribution model; meanwhile, an energy storage SOC emergency maintenance strategy is established, and it is ensured that the SOC state of energy storage is reasonably maintained; unified control of the new energy station and the energy storage subsystem is realized, the energy storage utilization rate is improved, maximum consumption of new energy is ensured, and the problem of difficulty in power tracking caused by power generation fluctuation is effectively relieved.

Description

Technical Field

[0001] The present invention relates to the technical field of new power system collaborative optimization, and in particular to a method and system for group control and dispatching of new energy stations and energy storage power stations. Background Art

[0002] my country's future energy structure will shift to clean-dominated and electricity-centered, and the energy supply side will shift from being dominated by fossil energy to being dominated by non-fossil energy such as wind and light. Clean and low-carbon has become an important direction for the development of future power grids. With the substantial increase in the installed capacity of new energy, the adverse effects of the uncertainty of its output process on the power grid have become increasingly prominent, and the balance regulation and safe and stable control of high-proportion new energy power systems need to be urgently addressed.

[0003] Energy storage technology can improve the flexibility, economy and safety of the power system. It is an important means to solve the problem of new energy consumption and a core element to achieve multi-energy coordination. The traditional new energy collection station system can only control the new energy station subsystem, but cannot control the energy storage subsystem configured in the new energy station. The energy storage utilization rate is low and the new energy consumption rate is not high. The present invention uniformly controls the new energy station subsystem and the new energy station energy storage subsystem, improves the utilization rate of energy storage, ensures the maximum consumption of new energy, and alleviates the problem of difficulty in power tracking of new energy collection stations caused by power generation fluctuations of new energy stations to a certain extent, providing a new guidance method for the coordinated optimization of new energy stations and energy storage power stations. Summary of the invention

[0004] In view of the above problems existing in the prior art, the present invention is proposed.

[0005] Therefore, the technical problem to be solved by the present invention is: to provide a method and system for group control and dispatching of new energy stations and energy storage power stations, aiming to accurately calculate and dispatch the power generation output of new energy stations and energy storage power stations by establishing an adjustable capacity model, a power shortage calculation model and an output allocation model, and to achieve optimal management of energy storage through an energy storage SOC maintenance strategy, thereby improving the efficiency and stability of group control and dispatching of new energy stations and energy storage power stations, and ensuring the reliable operation of the power system.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions, a method for group control and dispatching of new energy stations and energy storage power stations, comprising: establishing an adjustable capacity model of new energy stations, and calculating the adjustable capacity of new energy stations; establishing an adjustable capacity model of energy storage at new energy stations, and calculating the adjustable capacity of energy storage at new energy stations; calculating the power shortage of the new energy collection station at the current moment according to the power generation plan curve of the new energy collection station under scheduling and the power generation output of the new energy collection station at the current moment; establishing an output distribution model of new energy stations and energy storage, and calculating the power generation output of the new energy station and energy storage according to the power shortage of the new energy collection station at the current moment; establishing an energy storage SOC emergency maintenance strategy, and performing SOC maintenance on the energy storage according to the current adjustable capacity of the new energy station and the SOC status of the energy storage.

[0007] As a preferred solution of the group control and group adjustment method of a new energy station and an energy storage power station described in the present invention, the establishment of the adjustable capacity model of the new energy station is expressed as:

[0008]

[0009] in, represents the upward adjustment capability of the new energy station i at time t, represents the down-regulation capacity of the new energy station i at time t, represents the upper limit of active power regulation of renewable energy station i at time t, represents the lower limit of active power regulation of renewable energy station i at time t, represents the active power of renewable energy station i at time t, T cmd Represents the control instruction cycle, Indicates the active power regulation upslope rate of new energy station i It represents the down-slope rate of active power regulation of renewable energy station i. The average regulation error of renewable energy station is obtained according to the model calculation.

[0010] As a preferred solution of the group control and group adjustment method of a new energy station and an energy storage power station described in the present invention, wherein: the establishment of the energy storage adjustable capacity model of the new energy station is expressed as:

[0011]

[0012] in, It shows the upward adjustment capacity of the energy storage i of the new energy station at time t. represents the downward regulation capability of the energy storage i of the new energy station at time t, It represents the rated charging power of the energy storage i of the new energy station, It represents the rated discharge power of the energy storage i of the new energy station, represents the charging and discharging active power of the energy storage i at the new energy station at time t, represents the active regulation ramp-up rate of the energy storage i of the new energy station, It represents the active regulation downslope rate of the energy storage i of the new energy station, SOC i (t) represents the SOC of the energy storage i at the new energy station at time t, C i represents the charging cut-off SOC of the energy storage i at the new energy station, D i It represents the discharge cut-off SOC of the energy storage i of the new energy station; the energy storage control error of the new energy station is obtained according to the model calculation.

[0013] As a preferred solution of the group control and group adjustment method of a new energy station and an energy storage power station described in the present invention, the power shortage of the new energy collection station at the current moment is calculated as:

[0014] ΔP(t)=P tar (t)-P real (t)

[0015] Among them, ΔP(t) represents the active power shortage of the new energy collection station at time t, P tar (t) represents the planned active power value of the new energy collection station at time t, P real (t) represents the actual value of active power of the new energy collection station at time t; the power shortage control strategy of the new energy collection station is obtained according to the calculation result, and the power surplus control of the new energy collection station is carried out.

[0016] As a preferred solution of the group control and group regulation method of a new energy station and an energy storage power station described in the present invention, wherein: the average regulation error of the new energy station includes using the average regulation error model of the new energy station to be expressed as:

[0017]

[0018] Among them, E gen,i (j) represents the average control error of the jth control of the new energy station i, represents the j-th control value of the new energy station i, It represents the actual output value of the new energy station i during the j+1th regulation;

[0019] The energy storage control error of the new energy station includes using the energy storage control error model of the new energy station to be expressed as:

[0020]

[0021] Among them, E sto,i (j) represents the average control error of the jth control of energy storage i in the new energy station, represents the j-th regulation value of energy storage i at the new energy station, It represents the actual output value of the energy storage i of the new energy station during the j+1th regulation.

[0022] As an optimal solution of the group control and group regulation method of a new energy station and an energy storage power station described in the present invention, the power shortage control strategy of the new energy collection station includes calculating the average regulation error of the new energy station according to the new energy station regulation error model, and sorting the average regulation error; sorting the energy storage of the new energy station according to SOC.

[0023] As a preferred solution of the group control and group regulation method of a new energy station and an energy storage power station described in the present invention, the power surplus control of the new energy collection station includes calculating the average regulation error of the new energy station and the energy storage according to the regulation error model of the new energy station and the energy storage; sorting the new energy stations according to the average regulation error; sorting the energy storage of the new energy station: sorting the SOC according to the SOC i (t)≤D i The energy storage of new energy stations is sorted, and then the SOC is adjusted according to the average control error. i (t)>D i The new energy station energy storage is sorted.

[0024] Another object of the present invention is to provide a group control and dispatching system for new energy stations and energy storage power stations, which can calculate the adjustable capacity of new energy stations and energy storage in real time, accurately evaluate power shortages, optimize output distribution, and realize efficient management and maintenance of energy storage systems through energy storage SOC emergency maintenance strategies, thereby improving the overall dispatching efficiency and stability of new energy stations and energy storage power stations.

[0025] In order to solve the above technical problems, the present invention provides the following technical solutions: a new energy station and energy storage power station group control and group adjustment system, including: an adjustable capacity module, an energy storage adjustable capacity module, a power shortage calculation module, an output distribution calculation module and an energy storage SOC maintenance module;

[0026] The adjustable capacity module establishes an adjustable capacity model for new energy stations and calculates the adjustable capacity of new energy stations;

[0027] The energy storage adjustable capacity module establishes an energy storage adjustable capacity model for a new energy station and calculates the adjustable capacity of energy storage at the new energy station;

[0028] The power shortage calculation module calculates the power shortage of the new energy collection station at the current moment according to the power generation plan curve of the new energy collection station under scheduling and the power generation output of the new energy collection station at the current moment;

[0029] The output distribution calculation module establishes an output distribution model for new energy stations and energy storage, and calculates the power generation output of new energy stations and energy storage according to the power shortage of the new energy collection station at the current moment;

[0030] The energy storage SOC maintenance module establishes an energy storage SOC emergency maintenance strategy and performs SOC maintenance on the energy storage according to the current adjustable capacity of the new energy station and the energy storage SOC status.

[0031] A computer device includes a memory and a processor, wherein the memory stores a computer program, and is characterized in that when the processor executes the computer program, the steps of the above-mentioned method for group control and group dispatching of a new energy station and an energy storage power station are implemented.

[0032] A computer-readable storage medium having a computer program stored thereon, characterized in that when the computer program is executed by a processor, the steps of a method for group control and group dispatching of a new energy station and an energy storage power station as described above are implemented.

[0033] Beneficial effects of the invention: The invention uniformly controls the new energy station subsystem and the new energy station energy storage subsystem, improves the utilization rate of energy storage, ensures the maximum absorption of new energy, and to a certain extent alleviates the problem of difficulty in power tracking of new energy collection stations caused by power generation fluctuations of new energy stations, providing a new guidance method for the coordinated optimization of new energy stations and energy storage power stations. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0035] Figure 1 An overall flow chart of a method for group control and coordination of a new energy station and an energy storage power station provided for one embodiment of the present invention.

[0036] Figure 2 A flow chart of a method for group control and coordination of a new energy station and an energy storage power station provided in accordance with an embodiment of the present invention.

[0037] Figure 3 A shortage control flow chart of a method for group control and adjustment of a new energy station and an energy storage power station provided in accordance with an embodiment of the present invention.

[0038] Figure 4 A surplus control flow chart of a group control and adjustment method for a new energy station and an energy storage power station is provided as an embodiment of the present invention.

[0039] Figure 5 A flow chart of the energy storage SOC emergency maintenance control of a new energy station and energy storage power station group control and adjustment method provided by an embodiment of the present invention.

[0040] Figure 6 A main wiring diagram of a new energy collection station for a group control and group adjustment method of a new energy station and an energy storage power station provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0041] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the drawings of the specification. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary persons in the art without creative work should fall within the scope of protection of the present invention.

[0042] Example 1, reference Figure 1-Figure 5 , is an embodiment of the present invention, which provides a method for group control and group dispatching of a new energy station and an energy storage power station, including:

[0043] S1: Establish a new energy station adjustable capacity model and calculate the adjustable capacity of the new energy station.

[0044] It should be noted that if Figure 1 As shown in S1 and S2, the adjustable capacity model of new energy stations is established based on the parameters such as the upper limit of active power regulation, the lower limit of active power regulation, the real-time active power, the control instruction cycle, the active power regulation ramp-up rate, and the active power regulation ramp-down rate:

[0045]

[0046] in, represents the upward adjustment capability of the new energy station i at time t, represents the down-regulation capacity of the new energy station i at time t, represents the upper limit of active power regulation of renewable energy station i at time t, represents the lower limit of active power regulation of renewable energy station i at time t, represents the active power of renewable energy station i at time t, T cmd Represents the control instruction cycle, Indicates the active power regulation upslope rate of new energy station i It indicates the downhill rate of active power regulation of new energy station i.

[0047] Furthermore, the average control error of the new energy station is calculated according to the model. The average control error of the new energy station includes the average control error model of the new energy station expressed as:

[0048]

[0049] Among them, E gen,i(j) represents the average control error of the jth control of the new energy station i, represents the j-th control value of the new energy station i, It indicates the actual output value of the new energy station i during the j+1th regulation.

[0050] S2: Establish a new energy station energy storage adjustable capacity model and calculate the new energy station energy storage adjustable capacity.

[0051] It should be noted that if Figure 1 As shown in S3 and S4, based on the parameters such as the rated discharge active power, rated charging active power, real-time active power, control instruction cycle, active power regulation up-slope rate, active power regulation down-slope rate, current SOC, and discharge cut-off SOC of the new energy station energy storage, the energy storage adjustable capacity model of the new energy station is established:

[0052]

[0053] in, represents the upward adjustment capability of the new energy station i at time t, represents the down-regulation capacity of the new energy station i at time t, represents the upper limit of active power regulation of renewable energy station i at time t, represents the lower limit of active power regulation of renewable energy station i at time t, represents the active power of renewable energy station i at time t, T cmd Represents the control instruction cycle, Indicates the active power regulation upslope rate of new energy station i It indicates the downhill rate of active power regulation of new energy station i.

[0054] Furthermore, the average control error of the new energy station is calculated according to the model. The control error of the energy storage of the new energy station includes the use of the energy storage control error model of the new energy station as:

[0055]

[0056] Among them, E sto,i (j) represents the average control error of the jth control of energy storage i in the new energy station, represents the j-th regulation value of energy storage i at the new energy station, It represents the actual output value of the energy storage i of the new energy station during the j+1th regulation.

[0057] S3: Calculate the power shortage of the new energy collection station at the current moment according to the power generation plan curve of the new energy collection station under dispatch and the power generation output of the new energy collection station at the current moment.

[0058] It should be noted that if Figure 1As shown in S5, the power shortage of the new energy collection station at the current moment is calculated:

[0059] ΔP(t)=P tar (t)-P real (t)

[0060] Among them, ΔP(t) represents the active power shortage of the new energy collection station at time t, P tar (t) represents the planned active power value of the new energy collection station at time t, P real (t) represents the actual value of active power of the renewable energy collection station at time t.

[0061] Further, ΔP(t) is judged. If ΔP(t)=0, emergency maintenance control of the energy storage SOC of the new energy station is performed; if ΔP(t)>0, power shortage control of the new energy collection station is performed first, and then emergency maintenance control of the energy storage SOC of the new energy station is performed; if ΔP(t)<0, power surplus control of the new energy collection station is performed, and the power shortage of the new energy collection station at the current moment is calculated again.

[0062] S4: Establish an output distribution model for new energy stations and energy storage, and calculate the power generation output of new energy stations and energy storage according to the power shortage of the new energy collection station at the current moment.

[0063] It should be noted that if Figure 1 As shown in S6 and S7, the power shortage control strategy of the new energy collection station is obtained according to the calculation results.

[0064] Further, step 1: according to the new energy station control error model, the average control error of each new energy station is calculated, and the stations are sorted from small to large according to the average control error; the energy storage of the new energy stations is sorted from large to small according to SOC;

[0065] Step 2: Let i be the sequence number of the sorted new energy station, and M be the number of new energy stations; for all i, let Let i = 0;

[0066] Step 3: If ΔP(t)>0 and i≤M, calculate the output of the new energy station i:

[0067]

[0068] Otherwise, go to step 5;

[0069] Step 4: i=i+1, go to step 3;

[0070] Step 5: If ΔP(t)>0, go to step 6; otherwise, go to step 9;

[0071] Step 6: Let i be the sequence number of the energy storage station after sorting, and N be the number of energy storage stations in the energy storage station; for all i, let Let i = 0;

[0072] Step 7: If ΔP(t)>0 and i≤N, calculate the output of energy storage i at the new energy station:

[0073]

[0074] Otherwise, go to step 9;

[0075] Step 8: i=i+1, go to step 7;

[0076] Step 9: This regulation ends.

[0077] S5: Establish an energy storage SOC emergency maintenance strategy and perform SOC maintenance on energy storage based on the current adjustable capacity of the new energy station and the energy storage SOC status.

[0078] It should be noted that if Figure 1 As shown in S8 and S9, the power surplus control of the new energy collection station is carried out.

[0079] Further, step 1: according to the new energy station and energy storage control error model, calculate the average control error of each new energy station and energy storage; sort the new energy stations from small to large according to the average control error; sort the energy storage of new energy stations: sort the SOC from small to large according to the SOC i (t)≤D i The energy storage of new energy stations is sorted, and then the SOC is ranked according to the average control error from small to large. i (t)>d i Sort the energy storage of new energy stations;

[0080] Step 2: Let i be the sequence number of the energy storage station after sorting, and N be the number of energy storage stations in the energy storage station; for all n, let Let i = 0;

[0081] Step 3: If ΔP(t)<0 and i≤N, calculate the output of energy storage i at the new energy station:

[0082]

[0083] Otherwise, go to step 5;

[0084] Step 4: i=i+1, go to step 3;

[0085] Step 5: If ΔP(t)<0, go to step 6; otherwise, go to step 9;

[0086] Step 6: Let i be the sequence number of the sorted new energy station, and M be the number of new energy stations; for all i, let Let i = 0;

[0087] Step 7: If ΔP(t)<0 and i≤M, calculate the output of the new energy station i:

[0088]

[0089] Otherwise, go to step 9;

[0090] Step 8: i=i+1, go to step 7;

[0091] Step 9: This regulation ends.

[0092] Furthermore, the SOC emergency maintenance starting value S of the energy storage i of the new energy station is recorded. start,i , SOC emergency maintenance end setting value S start,i , and S start,i send,i <D i , the SOC emergency maintenance control strategy of the new energy station energy storage i is as follows:

[0093] Step 1: Let i be the sequence number of the sorted new energy station energy storage, f i is the emergency maintenance status mark of the energy storage i of the new energy station; for all i, let f i =0, Let n be the number of energy storage facilities in the new energy station, and let i = 1;

[0094] Step 2: If i≤N, proceed to the next step, otherwise, go to step 5;

[0095] Step 3: If SOC i (t)≤S start,i , then let f i =1, let the energy storage i be charged at rated power; if S start,i <SOC i (t)≤S send,i And f i =1, then continue to charge the energy storage i at rated power; if S start,i <SOC i (t)≤S send,i And f i =0, then proceed to the next step; if S send,i <SOC i (t) and f i =1, then stop charging the energy storage i, and let f i =0; if S send,i ​<SOC i (t) and f i =0, then stop charging the energy storage i, and let f i =0;

[0096] Step 4: i=i+1, go to step 2;

[0097] Step 5: This SOC emergency maintenance is completed.

[0098] The above is a schematic scheme of a group control and group dispatching method for a new energy station and an energy storage power station in this embodiment. It should be noted that the technical scheme of the system of the group control and group dispatching method for a new energy station and an energy storage power station and the technical scheme of the group control and group dispatching method for a new energy station and an energy storage power station mentioned above belong to the same concept. The details not described in detail in the technical scheme of the group control and group dispatching system for a new energy station and an energy storage power station in this embodiment can all be referred to the description of the technical scheme of the group control and group dispatching method for a new energy station and an energy storage power station mentioned above.

[0099] In this embodiment, a new energy station and energy storage power station group control and group dispatching system is characterized by comprising: an adjustable capacity module, an energy storage adjustable capacity module, a power shortage calculation module, an output distribution calculation module and an energy storage SOC maintenance module;

[0100] The adjustable capacity module establishes an adjustable capacity model for new energy stations and calculates the adjustable capacity of new energy stations;

[0101] The energy storage adjustable capacity module establishes an energy storage adjustable capacity model for a new energy station and calculates the adjustable capacity of energy storage at the new energy station;

[0102] The power shortage calculation module calculates the power shortage of the new energy collection station at the current moment according to the power generation plan curve of the new energy collection station under scheduling and the power generation output of the new energy collection station at the current moment;

[0103] The output distribution calculation module establishes an output distribution model for new energy stations and energy storage, and calculates the power generation output of new energy stations and energy storage according to the power shortage of the new energy collection station at the current moment;

[0104] The energy storage SOC maintenance module establishes an energy storage SOC emergency maintenance strategy and performs SOC maintenance on the energy storage according to the current adjustable capacity of the new energy station and the energy storage SOC status.

[0105] This embodiment further provides a computing device, which is applicable to a method for group control and group dispatching of a new energy station and an energy storage power station, including:

[0106] Memory and processor; the memory is used to store computer executable instructions, and the processor is used to execute computer executable instructions to implement a group control and dispatching method of a new energy station and an energy storage power station as proposed in the above embodiment.

[0107] This embodiment also provides a storage medium on which a computer program is stored. When the program is executed by a processor, a group control and coordination method of a new energy station and an energy storage power station as proposed in the above embodiment is implemented.

[0108] The storage medium proposed in this embodiment and the group control and adjustment method of a new energy station and an energy storage power station proposed in the above embodiment belong to the same inventive concept. The technical details not described in detail in this embodiment can be referred to the above embodiment, and this embodiment has the same beneficial effects as the above embodiment.

[0109] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc., which can store program codes.

[0110] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in conjunction with such instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in conjunction with such instruction execution systems, devices or apparatuses.

[0111] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0112] Example 2, reference Figure 6 An embodiment of the present invention provides a group control and dispatching method for a new energy station and an energy storage power station. In order to verify the beneficial effects of the present invention, scientific demonstration is carried out through economic benefit calculation and simulation experiments.

[0113] Initial state:

[0114] Wind farms, photovoltaic farms, and wind-solar farms can generate electricity freely at 500kW, 200kW, and 700kW;

[0115] The energy storage 1SOC is 35%, the rated charge and discharge power is 200kW, and no charging or discharging is performed;

[0116] The energy storage 2SOC is 27%, the rated charge and discharge power is 200kW, and no charging or discharging is performed;

[0117] The energy storage 3SOC is 15%, the rated charge and discharge power is 200kW, and no charging or discharging is performed;

[0118] The SOC settings for charge and discharge stop are 90% and 30% respectively;

[0119] The start and end values ​​of SOC emergency maintenance are 20% and 25% respectively.

[0120] If the target value of the new energy collection station is equal to the actual value at the current moment, that is, the power is balanced, then the energy storage SOC emergency maintenance control is performed:

[0121] Check that the current SOC of energy storage 1 is 35%, which is greater than the SOC emergency maintenance starting value of 20%, and no SOC maintenance is performed on energy storage 1;

[0122] Check that the current SOC of energy storage 2 is 27%, which is greater than the SOC emergency maintenance starting value of 20%, and no SOC maintenance is performed on energy storage 2;

[0123] Check that the current SOC of energy storage 3 is 15%, which is less than the SOC emergency maintenance starting value of 20%. Perform SOC maintenance on energy storage 3 and charge it at the rated charging power of 200kW. At this time, the new energy collection station has a power shortage of 200kW.

[0124] Then it enters the next round of group adjustment and group control process. At this time, the new energy collection station has a power shortage of 200kW and enters the power shortage control process:

[0125] Wind farms, photovoltaic farms, and wind-solar farms generate electricity freely without the ability to adjust upwards;

[0126] Check that the energy storage 1SOC is 35%, which is greater than the discharge cut-off value. After discharging, the power shortage of the new energy collection station becomes 100kW;

[0127] Check that the energy storage 2SOC is 27%, which is less than the discharge cut-off value and has no upward adjustment capability;

[0128] Check that the SOC of energy storage 3 is 23%, which is less than the SOC emergency maintenance stop value of 25%. Continue to charge energy storage SOC3 at the rated power of 200kW. At this time, the power shortage of the new energy collection station is 100kW, and the SOC of energy storage 1 becomes 30% due to discharge.

[0129] If the target value of the new energy collection station is lowered at this time, resulting in a power surplus of 700kW at the new energy collection station, then the power surplus control process will be entered:

[0130] Check that the SOC of energy storage 1 is 30%, which is less than the SOC charging cut-off value of 90%. Charge energy storage 1 at the rated power of 200kW. At this time, the power surplus of the new energy collection station is 500kW;

[0131] Check that the SOC of energy storage 2 is 27%, which is less than the SOC charging cut-off value of 90%. Charge energy storage 2 at the rated power of 200kW. At this time, the power surplus of the new energy collection station is 300kW;

[0132] Check that the SOC of energy storage 3 is 23%, which is less than the SOC charging cut-off value of 90%. Charge energy storage 3 at the rated power of 200kW. At this time, the power surplus of the new energy collection station is 100kW;

[0133] Check that the wind farm's reduction capacity is 500kW, and control the wind farm to generate electricity at 400kW. At this time, the power of the new energy collection station is balanced.

[0134] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A method for group control and group adjustment of new energy stations and energy storage power stations, characterized in that: include: Establish a new energy station adjustable capacity model and calculate the adjustable capacity of new energy stations; Establish a model for the adjustable capacity of energy storage at new energy stations and calculate the adjustable capacity of energy storage at new energy stations; According to the power generation plan curve of the new energy collection station under dispatch and the power generation output of the new energy collection station at the current moment, the power shortage of the new energy collection station at the current moment is calculated; Establish an output distribution model for new energy stations and energy storage, and calculate the power generation output of new energy stations and energy storage according to the current power shortage of the new energy collection station; Establish an energy storage SOC emergency maintenance strategy and perform SOC maintenance on energy storage based on the current adjustable capacity of the new energy station and the energy storage SOC status.

2. A method for group control and group adjustment of a new energy station and an energy storage power station as claimed in claim 1, characterized in that: The adjustable capacity model of the new energy station is expressed as: in, represents the upward adjustment capability of the new energy station i at time t, represents the down-regulation capacity of the new energy station i at time t, represents the upper limit of active power regulation of renewable energy station i at time t, represents the lower limit of active power regulation of renewable energy station i at time t, represents the active power of renewable energy station i at time t, T cmd Represents the control instruction cycle, Indicates the active power regulation upslope rate of new energy station i It represents the down-slope rate of active power regulation of new energy station i. The average regulation error of the new energy station is obtained according to the model calculation.

3. A method for group control and group adjustment of a new energy station and an energy storage power station as claimed in claim 2, characterized in that: The model for establishing the adjustable energy storage capacity of new energy stations is expressed as: in, It shows the upward adjustment capacity of the energy storage i of the new energy station at time t. represents the downward regulation capability of the energy storage i of the new energy station at time t, It represents the rated charging power of the energy storage i of the new energy station, It represents the rated discharge power of the energy storage i of the new energy station, represents the charging and discharging active power of the energy storage i at the new energy station at time t, represents the active regulation ramp-up rate of the energy storage i of the new energy station, It represents the active regulation downslope rate of the energy storage i of the new energy station, SOC i (t) represents the SOC of the energy storage i at the new energy station at time t, C i represents the charging cut-off SOC of the energy storage i at the new energy station, D i It represents the discharge cut-off SOC of the energy storage i of the new energy station; the energy storage control error of the new energy station is obtained according to the model calculation.

4. A method for group control and group adjustment of a new energy station and an energy storage power station as claimed in claim 3, characterized in that: The calculation of the power shortage of the new energy collection station at the current moment is expressed as: ΔP(t)=P tar (t)-P real (t) Among them, ΔP(t) represents the active power shortage of the new energy collection station at time t, P tar (t) represents the planned active power value of the new energy collection station at time t, P real (t) represents the actual value of active power of the new energy collection station at time t; the power shortage control strategy of the new energy collection station is obtained according to the calculation result, and the power surplus control of the new energy collection station is carried out.

5. A method for group control and group adjustment of a new energy station and an energy storage power station as claimed in claim 4, characterized in that: The average control error of the new energy station includes using the average control error model of the new energy station to be expressed as: Among them, E gen,i (j) represents the average control error of the jth control of the new energy station i, represents the j-th control value of the new energy station i, It represents the actual output value of the new energy station i during the j+1th regulation; The energy storage control error of the new energy station includes using the energy storage control error model of the new energy station to be expressed as: Among them, E sto,i (j) represents the average control error of the jth control of energy storage i in the new energy station, represents the j-th regulation value of energy storage i at the new energy station, It represents the actual output value of the energy storage i of the new energy station during the j+1th regulation.

6. A method for group control and group adjustment of a new energy station and an energy storage power station as claimed in claim 5, characterized in that: The power shortage control strategy of the new energy collection station includes calculating the average control error of the new energy station according to the new energy station control error model, and sorting the average control error; Sort the energy storage of new energy stations by SOC.

7. A method for group control and group adjustment of a new energy station and an energy storage power station as claimed in claim 6, characterized in that: The power surplus control of the new energy collection station includes calculating the average control error of the new energy station and the energy storage according to the new energy station and energy storage control error model; sorting the new energy station according to the average control error; sorting the energy storage of the new energy station according to the SOC; i (t)≤D i The energy storage of new energy stations is sorted, and then the SOC is adjusted according to the average control error. i (t)>D i The new energy station energy storage is sorted.

8. A system for group control and dispatching of a new energy station and an energy storage power station based on any one of claims 1 to 7, characterized in that: include: Adjustable capacity module, energy storage adjustable capacity module, power shortage calculation module, output distribution calculation module and energy storage SOC maintenance module; The adjustable capacity module establishes an adjustable capacity model for new energy stations and calculates the adjustable capacity of new energy stations; The energy storage adjustable capacity module establishes an energy storage adjustable capacity model for a new energy station and calculates the adjustable capacity of energy storage at the new energy station; The power shortage calculation module calculates the power shortage of the new energy collection station at the current moment according to the power generation plan curve of the new energy collection station under scheduling and the power generation output of the new energy collection station at the current moment; The output distribution calculation module establishes an output distribution model for new energy stations and energy storage, and calculates the power generation output of new energy stations and energy storage according to the power shortage of the new energy collection station at the current moment; The energy storage SOC maintenance module establishes an energy storage SOC emergency maintenance strategy and performs SOC maintenance on the energy storage according to the current adjustable capacity of the new energy station and the energy storage SOC status.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of a method for group control and dispatching of a new energy station and an energy storage power station as described in any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of a method for group control and coordination of a new energy station and an energy storage power station described in any one of claims 1 to 7 are implemented.

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