Day-before-day coordinated regulation and control method of power grid side energy storage system and related equipment

Abstract

The invention provides a day-ahead-intra-day coordinated regulation and control method of a power grid side energy storage system and related equipment, and an unexpected scheduling framework of the power grid side energy storage system is divided into two regulation and control stages of day-ahead planning and intra-day prospective scheduling. In the day-ahead plan stage, a day-ahead plan model including energy and power generation and utilization power unexpected constraints is constructed, optimization solution is carried out, and an optimization result of the day-ahead plan model is used as a boundary condition. In an intra-day look-ahead scheduling stage, an intra-day look-ahead scheduling model including energy and power generation and utilization power unpredictability constraints is constructed, optimization solution is carried out, and finally, on the basis of an intra-day look-ahead scheduling optimization result considering unpredictability and time sequence decoupling, actual regulation and control of a power grid side energy storage system in energy, operation conditions and power generation and utilization power are guided. According to the method provided by the invention, on one hand, the regulation and control scheme of the power grid side energy storage system can have the robustness guaranteed by the day-ahead plan, and on the other hand, the regulation and control scheme can have the flexibility brought by the day-ahead scheduling.

Description

Technical Field

[0001] The present invention relates to the field of grid-side energy storage system scheduling, and in particular to a day-ahead and intra-day coordinated control method for a grid-side energy storage system and related equipment. Background Art

[0002] With the increasing attention paid to clean energy and sustainable development, the development of new energy is becoming an inevitable trend in the power industry. Renewable energy, such as wind and solar energy, is widely considered to be an ideal alternative to traditional fossil fuels. Its pollution-free and renewable characteristics give it significant advantages in mitigating climate change and reducing carbon emissions. However, new energy is also accompanied by intermittent and volatile characteristics, which brings a series of challenges to the dispatching and operation of the power system. In order to effectively absorb new energy and improve the flexibility and robustness of the power system, energy storage systems have gradually received attention.

[0003] On the grid side, the energy storage system stores surplus renewable energy and releases it when needed, effectively balancing the difference between supply and demand and improving the stability and reliability of the power system. The grid-side energy storage system not only helps to reduce peak loads and fill valleys, reducing the peak load of the power grid, but also provides backup support to respond to emergencies, thereby reducing dependence on traditional power generation methods. Therefore, the regulation and operation of the grid-side energy storage system has become a key link in the construction and sustainable development of new power systems.

[0004] At present, the control process of the grid-side energy storage system can be controlled by the day-ahead-day coordinated control method. After research, the inventor found that there are many actual factors that are not considered in the day-ahead-day coordinated control process of the grid-side energy storage system, which makes the control efficiency in the actual control process low. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a day-ahead-intraday coordinated control method and related equipment for a grid-side energy storage system, which is used to control the operation of the grid-side energy storage system in the day-ahead planning stage and the intraday forward scheduling stage, thereby improving the actual control efficiency.

[0006] The present invention also provides a method and device for coordinated control of a grid-side energy storage system on a day-ahead and a day-intraday basis, which is used to ensure the implementation and application of the above method in practice.

[0007] A day-ahead and intraday coordinated control method for a grid-side energy storage system, comprising:

[0008] Determine the unexpected dispatch framework of grid-side energy storage systems;

[0009] The unexpected scheduling framework is divided into a day-ahead planning stage and an intraday forward-looking scheduling stage;

[0010] For the day-ahead planning stage, determine the day-ahead dispatching information and the day-ahead decision variables of the grid-side energy storage system; based on the day-ahead dispatching information and the day-ahead decision variables, construct a day-ahead planning model of the grid-side energy storage system according to the set day-ahead planning cycle, and optimize and solve the day-ahead planning model to obtain a first optimization result; the day-ahead planning model contains unexpected constraints on energy and unexpected constraints on power generation and consumption in the day-ahead planning stage; the first optimization result includes the energy boundary, operating conditions and power generation and consumption boundary of the grid-side energy storage system in each date period of the set date;

[0011] For the intraday forward-looking scheduling stage, the first optimization result is obtained, and the intraday scheduling information and the intraday decision variables of the grid-side energy storage system are determined; the energy boundary of the grid-side energy storage system at the end of each forward-looking scheduling cycle in the intraday forward-looking scheduling stage is constrained by the first optimization result as a boundary condition, and based on the intraday scheduling information and the intraday decision variables, an intraday forward-looking scheduling model of the grid-side energy storage system is constructed, and the intraday forward-looking scheduling model is optimized and solved according to a set solution cycle to obtain multiple second optimization results; the intraday forward-looking scheduling model contains unexpected constraints on energy and unexpected constraints on power generation and consumption in the intraday forward-looking scheduling stage; each of the second optimization results includes the energy boundary, operating conditions and power generation and consumption boundary of the grid-side energy storage system in a set time period;

[0012] Based on the first optimization result and each of the second optimization results, the energy, operating conditions and power generation and consumption of the grid-side energy storage system in the day-ahead planning stage and the intraday forward scheduling stage are coordinated and controlled.

[0013] The above-mentioned day-ahead-intraday coordinated control method of the grid-side energy storage system may optionally include constructing a day-ahead planning model of the grid-side energy storage system based on the day-ahead scheduling information and the day-ahead decision variables according to a set day-ahead planning period, including:

[0014] Construct the energy boundary constraint D1 of the grid-side energy storage system in the day-ahead planning stage:

[0015]

[0016] in:

[0017] represents the lower bound of the energy of the grid-side energy storage system s in time period t during the day-ahead planning stage;

[0018] represents the upper bound of the energy of the grid-side energy storage system s in time period t during the day-ahead planning stage;

[0019] DA represents the day-ahead planning stage;

[0020] represents the rated capacity of the grid-side energy storage system s, S represents the index set of the grid-side energy storage system s, and T represents the index set of the day-ahead planning stage;

[0021] Among them, the value of t in D1 is determined by T;

[0022] Construct the energy state relaxation constraint D2 of the grid-side energy storage system at the end of the day-ahead planning period:

[0023]

[0024] in:

[0025] |T| in D2 represents the end period in the day-ahead planning cycle, and the day-ahead planning cycle includes multiple periods, E s，|T| represents the target energy value of the grid-side energy storage system s in the time period |T|;

[0026] and is a non-negative variable used to relax the energy state constraint of the grid-side energy storage system s at |T|;

[0027] Represents the negative deviation between the energy storage value of the grid-side energy storage system s at |T| and the target energy value;

[0028] represents the positive deviation between the energy storage value of the grid-side energy storage system s at |T| and the target energy value;

[0029] Construct a power generation and consumption range constraint D3 for allowing the grid-side energy storage system to operate:

[0030]

[0031] in:

[0032] represents the lower limit variable of power generation of the grid-side energy storage system s in time period t during the day-ahead planning stage;

[0033] represents the power generation upper limit variable of the grid-side energy storage system s in time period t during the day-ahead planning stage;

[0034] It is used to indicate whether the power generation lower limit variable of the grid-side energy storage system s in time period t is effective during the day-ahead planning stage. Taking 1 means it works. A value of 0 indicates no effect;

[0035] It is used to indicate whether the power generation upper limit variable of the grid-side energy storage system s in time period t is effective during the day-ahead planning stage. Taking 1 means it works. A value of 0 indicates no effect;

[0036] represents the lower limit variable of the power consumption of the grid-side energy storage system s in time period t during the day-ahead planning stage;

[0037] represents the power consumption upper limit variable of the grid-side energy storage system s in time period t during the day-ahead planning stage;

[0038] It is used to indicate whether the power consumption lower limit variable of the grid-side energy storage system s in time period t is effective during the day-ahead planning stage. Taking 1 means it works. A value of 0 indicates no effect;

[0039] Used to indicate whether the power consumption upper limit variable of the grid-side energy storage system s in time period t is effective during the day-ahead planning stage; Taking 1 means it works. A value of 0 indicates no effect;

[0040] represents the rated power generation of the grid-side energy storage system s;

[0041] Indicates the rated power consumption of the grid-side energy storage system s;

[0042] DC represents the power generation state of the grid-side energy storage system s;

[0043] CH represents the power consumption state of the grid-side energy storage system s;

[0044] The robust state transfer equation M1 of the grid-side energy storage system in the day-ahead planning stage is constructed:

[0045]

[0046] in:

[0047] represents the power generation efficiency of the grid-side energy storage system s;

[0048] represents the power efficiency of the grid-side energy storage system s;

[0049] Δ represents the time granularity;

[0050] Construct the upper and lower limit constraints D4 of the power generation and consumption of the grid-side energy storage system in the day-ahead planning stage:

[0051]

[0052] Used to indicate the planned power generation and consumption status of the grid-side energy storage system s in time period t during the day-ahead planning stage;

[0053] when When it is 1, it means that the grid-side energy storage system s is planned to operate in the power generation state in time period t;

[0054] when When it is 0, it means that the grid-side energy storage system s is planned to operate in the power consumption state during time period t;

[0055] represents the power generation power of the grid-side energy storage system s in time period t during the day-ahead planning stage;

[0056] represents the power consumption of the grid-side energy storage system s in time period t during the day-ahead planning stage;

[0057] Based on the D1, D2, D3, D4 and M1, the construction of the day-ahead planning model is completed.

[0058] The above-mentioned day-ahead-intraday coordinated control method of the grid-side energy storage system, optionally, constructs an intraday forward-looking scheduling model of the grid-side energy storage system based on the intraday scheduling information and intraday decision variables, including:

[0059] Construct the energy boundary constraint D5 of the grid-side energy storage system in the forward scheduling stage within the day:

[0060]

[0061] in:

[0062] represents the lower bound of the energy of the grid-side energy storage system s in the time period τ during the intraday forward scheduling stage;

[0063] represents the upper bound of the energy of the grid-side energy storage system s in the time period τ during the intraday forward scheduling phase;

[0064] LA represents the forward-looking scheduling phase within the day;

[0065] T trepresents the set of indicators for the intraday forward-looking scheduling period in the current period t;

[0066] T t ={t,t+1,…,t+L-1}∩T, where L=16, L is the number of time periods in the intraday forward scheduling cycle;

[0067] Construct the energy boundary constraint D6 of the grid-side energy storage system at the end of each forward scheduling cycle in the forward scheduling stage within the day:

[0068]

[0069] in:

[0070] |T t | represents the end period of the forward scheduling cycle in the current period t;

[0071] Indicates time period |T t |The lower bound of the day-ahead planning energy;

[0072] Indicates time period |T t |The upper bound of the day-ahead plan energy;

[0073] Construct the energy state relaxation constraint D7 of the grid-side energy storage system at the end of the operation day:

[0074]

[0075] and is a non-negative variable used to relax the energy state constraint of the grid-side energy storage system s at the end of the operating day;

[0076] |T| in D7 indicates the end of the operating day;

[0077] E s,|T| represents the target energy value of the grid-side energy storage system s in the time period |T|;

[0078] Construct a constraint D8 for specifying the intraday forward-looking dispatching power generation and consumption range that allows the grid-side energy storage system to operate:

[0079]

[0080] in:

[0081] represents the lower limit variable of power generation of the grid-side energy storage system s in the period τ during the intraday forward-looking scheduling stage;

[0082] represents the power generation upper limit variable of the grid-side energy storage system s in the period τ during the intraday forward-looking scheduling stage;

[0083] It is used to indicate whether the power generation lower limit variable of the grid-side energy storage system s in the period τ is effective during the intraday forward-looking scheduling stage. Taking 1 means it works. A value of 0 indicates no effect;

[0084] Used to indicate whether the power generation upper limit variable of the grid-side energy storage system s in the time period τ is effective during the intraday forward-looking scheduling stage; Taking 1 means it works. A value of 0 indicates no effect;

[0085] represents the lower limit variable of the power consumption of the grid-side energy storage system s in the period τ during the intraday forward-looking scheduling stage;

[0086] represents the power consumption upper limit variable of the grid-side energy storage system s in the period τ during the intraday forward-looking scheduling stage;

[0087] It is used to indicate whether the power consumption lower limit variable of the grid-side energy storage system s in the period τ is effective during the intraday forward-looking scheduling stage. Taking 1 means it works. A value of 0 indicates no effect;

[0088] Used to indicate whether the power consumption upper limit variable of the grid-side energy storage system s in the time period τ is effective during the intraday forward-looking scheduling stage; Taking 1 means it works. A value of 0 indicates no effect;

[0089] The robust state transfer equation M2 of the grid-side energy storage system in the intraday forward-looking scheduling phase is constructed:

[0090]

[0091] Used to indicate the forward scheduling power generation and consumption status of the grid-side energy storage system s in the period τ during the forward scheduling stage within the day;

[0092] when When it is 1, it means that the grid-side energy storage system s is in the power generation state during the period τ.

[0093] when When it is 0, it means that the grid-side energy storage system s is operated in the power consumption state during the period τ in the forward scheduling;

[0094] represents the power generation power of the grid-side energy storage system s in the period τ during the intraday forward-looking scheduling stage;

[0095] represents the power consumption of the grid-side energy storage system s in the period τ during the intraday forward-looking scheduling stage;

[0096] Construct the upper and lower limit constraints D9 of the power generation and consumption of the grid-side energy storage system in the forward-looking scheduling stage within the day:

[0097]

[0098] Based on D5, D6, D7, D8, D9 and M2, the construction of the intraday forward-looking scheduling model is completed.

[0099] In the above-mentioned day-ahead and intra-day coordinated control method of the grid-side energy storage system, optionally, the determining of the day-ahead dispatch information includes:

[0100] Acquire a first technical parameter of the grid-side energy storage system in the day-ahead planning stage;

[0101] Acquire a first initial energy value of the grid-side energy storage system in an initial period of the day-ahead planning cycle and a first target energy value in an end period of the day-ahead planning cycle;

[0102] Acquire day-ahead uncertain parameter information of the grid-side energy storage system in the day-ahead planning stage;

[0103] The first technical parameter, the first initial energy value, the second target energy value and the day-ahead uncertain parameter information are determined as the day-ahead scheduling information.

[0104] In the above-mentioned day-ahead and intraday coordinated control method of the grid-side energy storage system, optionally, the determining of intraday dispatch information includes:

[0105] Acquire a second technical parameter of the grid-side energy storage system during the intraday forward scheduling phase;

[0106] Acquire a second initial energy value of the grid-side energy storage system in the initial period of each of the forward scheduling cycles in the intraday forward scheduling phase and a second target energy value of the final period of each of the forward scheduling periods;

[0107] Acquire intraday uncertain parameter information of the grid-side energy storage system during the intraday forward scheduling phase;

[0108] The second counting parameter, each of the second initial energy values, each of the second target energy values ​​and the intra-day uncertain parameter information are determined as the intra-day scheduling information.

[0109] In the above-mentioned day-ahead and intra-day coordinated control method of the grid-side energy storage system, optionally, the operating conditions include power supply conditions, load conditions and dual conditions.

[0110] The above-mentioned day-ahead-intraday coordinated control method of the grid-side energy storage system may optionally divide the unexpected scheduling framework into a day-ahead planning stage and an intraday forward-looking scheduling stage, including:

[0111] Determining the operation day of the grid-side energy storage system according to the control time scale of the grid-side energy storage system;

[0112] Determine the day before the operation day as the day-ahead planning stage;

[0113] The intermediate period from zero o'clock of the operating day to zero o'clock of the next operating day is determined as the intraday forward-looking scheduling stage.

[0114] A day-ahead and intraday coordinated control device for a grid-side energy storage system, comprising:

[0115] A determination unit, used to determine an unexpected dispatch framework of a grid-side energy storage system;

[0116] A division unit, used for dividing the unexpected scheduling framework into a day-ahead planning stage and an intraday forward scheduling stage;

[0117] A first construction unit is used to determine the day-ahead dispatching information and the day-ahead decision variables of the grid-side energy storage system for the day-ahead planning stage; based on the day-ahead dispatching information and the day-ahead decision variables, a day-ahead planning model of the grid-side energy storage system is constructed according to a set day-ahead planning period, and the day-ahead planning model is optimized and solved to obtain a first optimization result; the day-ahead planning model contains unexpected constraints on energy and unexpected constraints on power generation and consumption in the day-ahead planning stage; the first optimization result includes the energy boundary, operating conditions and power generation and consumption boundary of the grid-side energy storage system in each date period of the set date;

[0118] A second construction unit is used to obtain the first optimization result for the intraday forward scheduling stage, and determine the intraday scheduling information and the intraday decision variables of the grid-side energy storage system; use the first optimization result as a boundary condition to constrain the energy boundary of the grid-side energy storage system at the end of each forward scheduling cycle in the intraday forward scheduling stage, and construct an intraday forward scheduling model of the grid-side energy storage system based on the intraday scheduling information and the intraday decision variables, and optimize and solve the intraday forward scheduling model according to a set solution cycle to obtain multiple second optimization results; the intraday forward scheduling model contains unexpected constraints on energy and unexpected constraints on power generation and consumption in the intraday forward scheduling stage; each of the second optimization results includes the energy boundary, operating conditions and power generation and consumption boundary of the grid-side energy storage system in a set time period;

[0119] A control unit is used to coordinately control the energy, operating conditions and power generation and consumption of the grid-side energy storage system in the day-ahead planning stage and the intra-day forward scheduling stage based on the first optimization result and each of the second optimization results.

[0120] A storage medium includes stored instructions, wherein when the instructions are executed, the device where the storage medium is located is controlled to execute the above-mentioned day-ahead-intraday coordinated control method of a grid-side energy storage system.

[0121] An electronic device includes a memory and one or more instructions, wherein the one or more instructions are stored in the memory and are configured to be executed by one or more processors to perform the above-mentioned day-ahead and intra-day coordinated control method of a grid-side energy storage system.

[0122] Compared with the prior art, the present invention has the following advantages:

[0123] The present invention provides a day-ahead-intraday coordinated control method for a grid-side energy storage system. The method divides the unexpected dispatching framework of the grid-side energy storage system into two control stages: day-ahead planning and intraday forward dispatching. In the day-ahead planning stage, a day-ahead planning model including unexpected constraints on energy and power generation and consumption is constructed and optimized. Then, the optimization results of the day-ahead planning model are used as boundary conditions. In the intraday forward dispatching stage, an intraday forward dispatching model including unexpected constraints on energy and power generation and consumption is constructed and optimized. Finally, based on the optimization results of the intraday forward dispatching that consider unexpectedness and timing decoupling, the actual control of the energy, operating conditions and power generation and consumption of the grid-side energy storage system is guided. The method provided by the present invention enables the control scheme of the grid-side energy storage system to have the robustness guaranteed by the day-ahead plan on the one hand, and the flexibility brought by the intraday forward dispatching on the other hand. Thereby, the actual control efficiency of the grid-side energy storage system is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0124] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0125] Figure 1 A method flow chart of a day-ahead and intra-day coordinated control method of a grid-side energy storage system provided by the present invention;

[0126] Figure 2 An example diagram of a day-ahead and intra-day coordinated control method for a grid-side energy storage system provided by the present invention;

[0127] Figure 3 Another example diagram of a day-ahead and intra-day coordinated control method for a grid-side energy storage system provided by the present invention;

[0128] Figure 4 Another example diagram of a day-ahead and intra-day coordinated control method for a grid-side energy storage system provided by the present invention;

[0129] Figure 5 A schematic diagram of the structure of a day-ahead and intra-day coordinated control device for a grid-side energy storage system provided by the present invention;

[0130] Figure 6 The present invention provides a schematic structural diagram of an electronic device. DETAILED DESCRIPTION

[0131] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0132] The present invention can be used in many general or special computing device environments or configurations, such as personal computers, server computers, handheld or portable devices, tablet devices, multi-processor devices, distributed computing environments including any of the above devices or equipment, etc.

[0133] The embodiment of the present invention provides a day-ahead-intraday coordinated control method for a grid-side energy storage system. The method can be applied to a system platform where the grid-side energy storage system is located, and its execution subject can be a processor in the platform. The method flow chart of the method is as follows: Figure 1 As shown, including:

[0134] S101: Determine an unexpected dispatch framework of the grid-side energy storage system;

[0135] In the method provided by the embodiment of the present invention, when the grid-side energy storage system is coordinated and controlled day-ahead and day-intraday, the processor first determines the unexpected dispatch framework of the grid-side energy storage system. The unexpected dispatch framework can be understood as an overall time period for dispatching the grid-side energy storage system.

[0136] S102: Divide the unexpected scheduling framework into a day-ahead planning stage and an intraday forward-looking scheduling stage;

[0137] In the method provided by the embodiment of the present invention, according to the actual process of regulating the grid-side energy storage system, the unexpected scheduling framework of the grid-side energy storage system is divided into a day-ahead planning stage and an intraday forward scheduling stage.

[0138] S103: For the day-ahead planning stage, determine the day-ahead dispatch information and the day-ahead decision variables of the grid-side energy storage system; based on the day-ahead dispatch information and the day-ahead decision variables, construct a day-ahead planning model of the grid-side energy storage system according to the set day-ahead planning cycle, and optimize and solve the day-ahead planning model to obtain a first optimization result; the day-ahead planning model contains unexpected constraints on energy and unexpected constraints on power generation and consumption in the day-ahead planning stage; the first optimization result includes the energy boundary, operating conditions and power generation and consumption boundary of the grid-side energy storage system at each date period of the set date;

[0139] S104: For the intraday forward-looking scheduling stage, the first optimization result is obtained, and the intraday scheduling information and the intraday decision variables of the grid-side energy storage system are determined; the energy boundary of the grid-side energy storage system at the end of each forward-looking scheduling cycle in the intraday forward-looking scheduling stage is constrained by the first optimization result as a boundary condition, and based on the intraday scheduling information and the intraday decision variables, an intraday forward-looking scheduling model of the grid-side energy storage system is constructed, and the intraday forward-looking scheduling model is optimized and solved according to a set solution cycle to obtain multiple second optimization results; the intraday forward-looking scheduling model contains unexpected constraints on energy and unexpected constraints on power generation and consumption in the intraday forward-looking scheduling stage; each of the second optimization results includes the energy boundary, operating condition and power generation and consumption boundary of the grid-side energy storage system in the set time period;

[0140] S105: Based on the first optimization result and each of the second optimization results, the energy, operating conditions and power generation and consumption of the grid-side energy storage system in the day-ahead planning stage and the intraday forward scheduling stage are coordinated and controlled.

[0141] The present invention provides a day-ahead-intraday coordinated control method for a grid-side energy storage system. The method divides the unexpected dispatching framework of the grid-side energy storage system into two control stages: day-ahead planning and intraday forward dispatching. In the day-ahead planning stage, a day-ahead planning model including unexpected constraints on energy and power generation and consumption is constructed and optimized. Then, the optimization results of the day-ahead planning model are used as boundary conditions. In the intraday forward dispatching stage, an intraday forward dispatching model including unexpected constraints on energy and power generation and consumption is constructed and optimized. Finally, based on the optimization results of the intraday forward dispatching that consider unexpectedness and timing decoupling, the actual control of the energy, operating conditions and power generation and consumption of the grid-side energy storage system is guided. The method provided by the present invention enables the control scheme of the grid-side energy storage system to have the robustness guaranteed by the day-ahead plan on the one hand, and the flexibility brought by the intraday forward dispatching on the other hand. Thereby, the actual control efficiency of the grid-side energy storage system is improved.

[0142] In the method provided by the embodiment of the present invention, in the day-ahead planning stage, the day-ahead decision variables of the grid-side energy storage system regarding energy, operating conditions and power generation and consumption are introduced, and the day-ahead scheduling information in the day-ahead planning stage is determined. Based on the day-ahead scheduling information and the day-ahead decision variables, a day-ahead planning model is constructed according to the set day-ahead planning period.

[0143] In the method provided by the embodiment of the present invention, 24 hours is used as a day-ahead planning cycle, and a day-ahead planning cycle is divided into multiple time periods. Generally, 24 hours is divided into 96 time periods.

[0144] The day-ahead planning model is optimized and solved to obtain a first optimization result.

[0145] Specifically, with 24 hours as a day-ahead planning cycle, a day-ahead planning model for the grid-side energy storage system including unexpected constraints on energy and power generation and consumption is constructed to optimize the energy boundary, operating conditions and power generation and consumption boundary of the grid-side energy storage system in 96 time periods of 24 hours. The above 96 time periods refer to the number of time periods in the day-ahead planning cycle, with 15 minutes as one time period, and a total of 96 time periods in 24 hours.

[0146] In the method provided by the embodiment of the present invention, in the intraday forward scheduling stage, the optimization results and intraday scheduling information of the day-ahead planning stage are obtained, and the intraday decision variables of the grid-side energy storage system regarding energy, operating conditions and power generation and consumption in the intraday forward scheduling stage are introduced. The optimization results of the day-ahead planning stage are used as boundary conditions to constrain the energy boundary of the energy storage system at the end of each forward scheduling cycle in the intraday forward scheduling stage. Based on the intraday scheduling information and intraday decision variables, with 4 hours (16 time periods) as the forward scheduling cycle, an intraday forward scheduling model for the grid-side energy storage system including unexpected constraints on energy and power generation and consumption is constructed, which is rolled every 15 minutes to optimize the energy boundary, operating conditions and power generation and consumption boundary of the grid-side energy storage system in the next 4 hours (16 time periods). The 16 time periods refer to the number of time periods in the intraday forward scheduling cycle, with 15 minutes as one time period, and a total of 16 time periods in the next 4 hours.

[0147] The method provided in the embodiment of the present invention guides the coordinated regulation of the energy, operating conditions and power generation and consumption of the grid-side energy storage system in the two stages of day-ahead and day-intraday based on the optimization results of the day-ahead plan and intraday forward scheduling with unpredictability and time sequence decoupling.

[0148] in:

[0149] The unpredictability refers to the fact that since the realization of uncertain quantities such as renewable energy output is gradually observed, scheduling decisions should only rely on the observed values ​​of uncertain quantities up to the current moment, and cannot rely on the observed values ​​of uncertain quantities in the future.

[0150] The day-ahead scheduling information includes technical parameters of the grid-side energy storage system, energy values ​​in the initial period of the day-ahead planning cycle, target energy values ​​in the end period of the day-ahead planning cycle, and system day-ahead uncertain parameter information.

[0151] Regarding the operating conditions, the grid-side energy storage system is modeled as having three selectable operating conditions, namely, power supply condition, load condition and dual condition.

[0152] The optimization results of the day-ahead plan include the energy boundary, operating conditions and power generation and consumption boundary of the grid-side energy storage system in 96 time periods the next day.

[0153] The intraday dispatching information includes technical parameters of the grid-side energy storage system, energy values ​​in the initial period of the intraday forward-looking dispatching cycle, target energy values ​​in the end period of the intraday forward-looking dispatching cycle, and system intraday uncertain parameter information.

[0154] The rolling every 15 minutes refers to optimizing and calculating the intraday forward-looking scheduling model of the grid-side energy storage system every 15 minutes (each time period).

[0155] The timing decoupling refers to the scheduling decision of the grid-side energy storage system being executed sequentially according to time periods, the operating constraints between time periods being independent of each other, and the constraints across (multiple) time periods being decoupled.

[0156] In the method provided in the embodiment of the present invention, the day-ahead scheduling model of the grid-side energy storage system is constructed based on the day-ahead scheduling information and the day-ahead decision variables according to the set day-ahead planning period, including:

[0157] Construct the energy boundary constraint D1 of the grid-side energy storage system in the day-ahead planning stage:

[0158]

[0159] in:

[0160] represents the lower bound of the energy of the grid-side energy storage system s in time period t during the day-ahead planning stage;

[0161] represents the upper bound of the energy of the grid-side energy storage system s in time period t during the day-ahead planning stage;

[0162] and is a continuous variable.

[0163] DA represents the day-ahead planning stage;

[0164] represents the rated capacity of the grid-side energy storage system s, S represents the index set of the grid-side energy storage system s, and T represents the index set of the day-ahead planning stage;

[0165] Among them, the value of t in D1 is determined by T;

[0166] Construct the energy state relaxation constraint D2 of the grid-side energy storage system at the end of the day-ahead planning period:

[0167]

[0168] in:

[0169] |T| in D2 represents the end period in the day-ahead planning cycle, and the day-ahead planning cycle includes multiple periods, E s,|T| represents the target energy value of the grid-side energy storage system s in the time period |T|;

[0170] and is a non-negative variable used to relax the energy state constraint of the grid-side energy storage system s at |T|;

[0171] Represents the negative deviation between the energy storage value of the grid-side energy storage system s at |T| and the target energy value;

[0172] represents the positive deviation between the energy storage value of the grid-side energy storage system s at |T| and the target energy value;

[0173] Construct a power generation and consumption range constraint D3 for allowing the grid-side energy storage system to operate:

[0174]

[0175] in:

[0176] represents the lower limit variable of power generation of the grid-side energy storage system s in time period t during the day-ahead planning stage;

[0177] represents the power generation upper limit variable of the grid-side energy storage system s in time period t during the day-ahead planning stage;

[0178] and Continuous variables;

[0179] It is used to indicate whether the power generation lower limit variable of the grid-side energy storage system s in time period t is effective during the day-ahead planning stage. Taking 1 means it works. A value of 0 indicates no effect;

[0180] It is used to indicate whether the power generation upper limit variable of the grid-side energy storage system s in time period t is effective during the day-ahead planning stage. Taking 1 means it works. A value of 0 indicates no effect;

[0181] and is a binary variable;

[0182] represents the lower limit variable of the power consumption of the grid-side energy storage system s in time period t during the day-ahead planning stage;

[0183] represents the power consumption upper limit variable of the grid-side energy storage system s in time period t during the day-ahead planning stage;

[0184] and is a continuous variable;

[0185] It is used to indicate whether the power consumption lower limit variable of the grid-side energy storage system s in time period t is effective during the day-ahead planning stage. Taking 1 means it works. A value of 0 indicates no effect;

[0186] Used to indicate whether the power consumption upper limit variable of the grid-side energy storage system s in time period t is effective during the day-ahead planning stage; Taking 1 means it works. A value of 0 indicates no effect;

[0187] and is a binary variable;

[0188] represents the rated power generation of the grid-side energy storage system s;

[0189] Indicates the rated power consumption of the grid-side energy storage system s;

[0190] DC represents the power generation state of the grid-side energy storage system s;

[0191] CH represents the power consumption state of the grid-side energy storage system s;

[0192] The power generation and consumption power interval has a corresponding relationship with the operating condition, and the power supply condition corresponds to the power interval Load conditions corresponding to the power range Dual working conditions corresponding to the power range From the constraints, we know that Only two variables are needed to specify a power range, that is, to specify an operating condition, so the other two variables are forced to be 0.

[0193] The robust state transfer equation M1 of the grid-side energy storage system in the day-ahead planning stage is constructed:

[0194]

[0195] in:

[0196] represents the power generation efficiency of the grid-side energy storage system s;

[0197] represents the power efficiency of the grid-side energy storage system s;

[0198] Δ represents the time granularity;

[0199] Construct the upper and lower limit constraints D4 of the power generation and consumption of the grid-side energy storage system in the day-ahead planning stage:

[0200]

[0201] Used to indicate the planned power generation and consumption status of the grid-side energy storage system s in time period t during the day-ahead planning stage;

[0202] is a binary variable;

[0203] when When it is 1, it means that the grid-side energy storage system s is planned to operate in the power generation state in time period t;

[0204] when When it is 0, it means that the grid-side energy storage system s is planned to operate in the power consumption state during time period t;

[0205] represents the power generation power of the grid-side energy storage system s in time period t during the day-ahead planning stage;

[0206] represents the power consumption of the grid-side energy storage system s in time period t during the day-ahead planning stage;

[0207] and is a continuous variable;

[0208] Based on the D1, D2, D3, D4 and M1, the construction of the day-ahead planning model is completed.

[0209] The method provided in the embodiment of the present invention introduces the above-mentioned variables to construct corresponding constraints and equations to construct an overall day-ahead planning model.

[0210] In the formulas corresponding to the above-mentioned constraints and equations, the specific meanings of the corresponding variables do not affect the actual construction of each constraint due to the use of the same characters. For example, the character t in the above-mentioned constraints means time, but the value in different constraints may be different. The specific value of the character t can be determined according to the actual usage environment of each constraint. Such use will not cause unclear problems between the constraints. After viewing the construction process of each constraint and the values ​​and specific meanings of the corresponding characters, technical personnel in this field can clearly apply each constraint and the formula in the constraint.

[0211] The various constraints constructed in the day-ahead planning stage can ensure that no matter what the energy of the grid-side energy storage system is, the grid-side energy storage system can operate safely within the power range shown by the upper and lower limits of the day-ahead planned power generation and consumption, and the power generation and consumption in each operating period are independent of each other, that is, the day-ahead planning model of the grid-side energy storage system including the energy and power generation and consumption constraints realizes the temporal decoupling of the grid-side energy storage system to operate sequentially in time periods within the day-ahead planning cycle.

[0212] In the method provided in the embodiment of the present invention, the intraday forward-looking scheduling model of the grid-side energy storage system is constructed based on the intraday scheduling information and the intraday decision variables, including:

[0213] Construct the energy boundary constraint D5 of the grid-side energy storage system in the forward scheduling stage within the day:

[0214]

[0215] in:

[0216] represents the lower bound of the energy of the grid-side energy storage system s in the time period τ during the intraday forward scheduling stage;

[0217] represents the upper bound of the energy of the grid-side energy storage system s in the time period τ during the intraday forward scheduling phase;

[0218] and is a continuous variable;

[0219] LA represents the forward-looking scheduling phase within the day;

[0220] T t represents the set of indicators for the intraday forward-looking scheduling period in the current period t;

[0221] T t ={t,t+1,…,t+L-1}∩T, where L=16, L is the number of time periods in the intraday forward scheduling cycle;

[0222] Construct the energy boundary constraint D6 of the grid-side energy storage system at the end of each forward scheduling cycle in the forward scheduling stage within the day:

[0223]

[0224] in:

[0225] |T t | represents the end period of the forward scheduling cycle in the current period t;

[0226] Indicates time period |T t |The lower bound of the day-ahead planning energy;

[0227] Indicates time period |T t |The upper bound of the day-ahead plan energy;

[0228] Construct the energy state relaxation constraint D7 of the grid-side energy storage system at the end of the operation day:

[0229]

[0230] and is a non-negative variable used to relax the energy state constraint of the grid-side energy storage system s at the end of the operating day;

[0231] |T| in D7 indicates the end of the operating day;

[0232] E s,|T| represents the target energy value of the grid-side energy storage system s in the time period |T|;

[0233] Construct a constraint D8 for specifying the intraday forward-looking dispatching power generation and consumption range that allows the grid-side energy storage system to operate:

[0234]

[0235] in:

[0236] represents the lower limit variable of power generation of the grid-side energy storage system s in the period τ during the intraday forward-looking scheduling stage;

[0237] represents the power generation upper limit variable of the grid-side energy storage system s in the period τ during the intraday forward-looking scheduling stage;

[0238] and is a continuous variable;

[0239] It is used to indicate whether the power generation lower limit variable of the grid-side energy storage system s in the period τ is effective during the intraday forward-looking scheduling stage. Taking 1 means it works. A value of 0 indicates no effect;

[0240] Used to indicate whether the power generation upper limit variable of the grid-side energy storage system s in the time period τ is effective during the intraday forward-looking scheduling stage; Taking 1 means it works. A value of 0 indicates no effect;

[0241] and is a binary variable;

[0242] represents the lower limit variable of the power consumption of the grid-side energy storage system s in the period τ during the intraday forward-looking scheduling stage;

[0243] represents the power consumption upper limit variable of the grid-side energy storage system s in the period τ during the intraday forward-looking scheduling stage;

[0244] and is a continuous variable;

[0245] It is used to indicate whether the power consumption lower limit variable of the grid-side energy storage system s in the period τ is effective during the intraday forward-looking scheduling stage. Taking 1 means it works. A value of 0 indicates no effect;

[0246] Used to indicate whether the power consumption upper limit variable of the grid-side energy storage system s in the time period τ is effective during the intraday forward-looking scheduling stage; Taking 1 means it works. A value of 0 indicates no effect;

[0247] and is a binary variable;

[0248] The power generation and consumption power interval has a corresponding relationship with the operating condition, and the power supply condition corresponds to the power interval Load conditions corresponding to the power range Dual working conditions corresponding to the power range From the constraints, we know that Only two variables are needed to specify a power range, that is, to specify an operating condition, so the other two variables are forced to be 0.

[0249] The robust state transfer equation M2 of the grid-side energy storage system in the intraday forward-looking scheduling phase is constructed:

[0250]

[0251] Used to indicate the forward scheduling power generation and consumption status of the grid-side energy storage system s in the period τ during the forward scheduling stage within the day;

[0252] is a binary variable;

[0253] when When it is 1, it means that the grid-side energy storage system s is in the power generation state during the period τ.

[0254] when When it is 0, it means that the grid-side energy storage system s is operated in the power consumption state during the period τ in the forward scheduling;

[0255] represents the power generation power of the grid-side energy storage system s in the period τ during the intraday forward-looking scheduling stage;

[0256] represents the power consumption of the grid-side energy storage system s in the period τ during the intraday forward-looking scheduling stage;

[0257] and is a continuous variable;

[0258] Construct the upper and lower limit constraints D9 of the power generation and consumption of the grid-side energy storage system in the forward-looking scheduling stage within the day:

[0259]

[0260] Based on D5, D6, D7, D8, D9 and M2, the construction of the intraday forward-looking scheduling model is completed.

[0261] The method provided in the embodiment of the present invention introduces the above-mentioned variables, constructs corresponding constraints and equations, and constructs an overall intraday forward-looking scheduling model.

[0262] In the formulas corresponding to the above-mentioned constraints and equations, the specific meanings of the corresponding variables do not affect the actual construction of each constraint due to the use of the same characters. The meanings of the corresponding characters in the above-mentioned constraints can express the same meaning, but the values ​​in different constraints can be different. The specific values ​​of the characters can be determined according to the actual usage environment of each constraint. Such use will not cause unclear problems between the constraints. After viewing the construction process of each constraint and the values ​​and specific meanings of the corresponding characters, technical personnel in this field can clearly apply each constraint and the formulas in the constraints.

[0263] The various constraints constructed in the intraday forward-looking scheduling stage can ensure that no matter what the energy of the grid-side energy storage system is, the grid-side energy storage system can operate safely within the power range shown by the upper and lower limits of the intraday forward-looking scheduling power generation and consumption, and the power generation and consumption in each operating period are independent of each other, that is, the intraday forward-looking scheduling model of the grid-side energy storage system including the unexpected constraints on energy and power generation and consumption realizes the temporal decoupling of the grid-side energy storage system to operate sequentially in time periods within the forward-looking scheduling cycle.

[0264] In the method provided in the embodiment of the present invention, the determining of the day-ahead scheduling information includes:

[0265] Acquire a first technical parameter of the grid-side energy storage system in the day-ahead planning stage;

[0266] Acquire a first initial energy value of the grid-side energy storage system in an initial period of the day-ahead planning cycle and a first target energy value in an end period of the day-ahead planning cycle;

[0267] Acquire day-ahead uncertain parameter information of the grid-side energy storage system in the day-ahead planning stage;

[0268] The first technical parameter, the first initial energy value, the second target energy value and the day-ahead uncertain parameter information are determined as the day-ahead scheduling information.

[0269] In the method provided by an embodiment of the present invention, the day-ahead scheduling information includes the first technical parameters of the day-ahead stage, the first initial energy value of the grid-side energy storage system in the initial period of the day-ahead planning cycle and the first target energy value in the end period of the day-ahead planning cycle, and the day-ahead uncertain parameter information of the grid-side energy storage system in the day-ahead planning stage.

[0270] In the method provided by the embodiment of the present invention, the determining of intraday scheduling information includes:

[0271] Acquire a second technical parameter of the grid-side energy storage system during the intraday forward scheduling phase;

[0272] Acquire a second initial energy value of the grid-side energy storage system in the initial period of each of the forward scheduling cycles in the intraday forward scheduling phase and a second target energy value of the final period of each of the forward scheduling periods;

[0273] Acquire intraday uncertain parameter information of the grid-side energy storage system during the intraday forward scheduling phase;

[0274] The second counting parameter, each of the second initial energy values, each of the second target energy values ​​and the intra-day uncertain parameter information are determined as the intra-day scheduling information.

[0275] In the method provided by an embodiment of the present invention, the intraday scheduling information includes: the second technical parameter of the grid-side energy storage system in the intraday forward scheduling stage, the second initial energy value of the grid-side energy storage system in the initial time period of each of the forward scheduling cycles in the intraday forward scheduling stage and the second target energy value of the final time period of each of the forward scheduling periods, and the intraday uncertain parameter information of the grid-side energy storage system in the intraday forward scheduling stage.

[0276] In the method provided by the embodiment of the present invention, the operating conditions include power supply conditions, load conditions and dual conditions.

[0277] In the method provided in the embodiment of the present invention, the unexpected scheduling framework is divided into a day-ahead planning stage and an intraday forward-looking scheduling stage, including:

[0278] Determining the operation day of the grid-side energy storage system according to the control time scale of the grid-side energy storage system;

[0279] Determine the day before the operation day as the day-ahead planning stage;

[0280] The intermediate period from zero o'clock of the operating day to zero o'clock of the next operating day is determined as the intraday forward-looking scheduling stage.

[0281] refer to Figure 2 , Figure 3 and Figure 4 , showing an example diagram of a day-ahead and intra-day coordinated control method for a grid-side energy storage system provided by an embodiment of the present invention, and the specific process of actual application: Figure 2-Figure 4 The day-ahead planned energy boundary shown in the figure is derived from the first optimization result obtained by solving the day-ahead planning model. The day-ahead planned energy boundary is used as the boundary condition. During the intraday forward scheduling stage, the energy boundary of the last time period of each forward scheduling cycle (the forward scheduling time window shown in the figure) must meet the constraints of the day-ahead planned energy boundary (that is, it must be within the day-ahead planned energy boundary), while other time periods other than the last time period are not subject to such constraints. This design enables the control scheme of the grid-side energy storage system to have the robustness guaranteed by the day-ahead plan while giving full play to the flexibility brought by the intraday forward scheduling.

[0282] and Figure 1 Corresponding to the method described above, the embodiment of the present invention further provides a day-ahead-intraday coordinated control device for a grid-side energy storage system, for Figure 1 The specific implementation of the method is shown in the following diagram: Figure 5 As shown, specifically including:

[0283] A determination unit 201, configured to determine an unexpected dispatch framework of a grid-side energy storage system;

[0284] A division unit 202, configured to divide the unexpected scheduling framework into a day-ahead planning phase and an intra-day forward scheduling phase;

[0285] The first construction unit 203 is used to determine the day-ahead scheduling information and the day-ahead decision variables of the grid-side energy storage system for the day-ahead planning stage; based on the day-ahead scheduling information and the day-ahead decision variables, a day-ahead planning model of the grid-side energy storage system is constructed according to a set day-ahead planning period, and the day-ahead planning model is optimized and solved to obtain a first optimization result; the day-ahead planning model includes unexpected energy constraints and unexpected power generation and consumption constraints in the day-ahead planning stage; the first optimization result includes the energy boundary, operating conditions and power generation and consumption boundary of the grid-side energy storage system at each date period of the set date;

[0286] The second construction unit 204 is used to obtain the first optimization result for the intraday forward scheduling stage, and determine the intraday scheduling information and the intraday decision variables of the grid-side energy storage system; use the first optimization result as a boundary condition to constrain the energy boundary of the grid-side energy storage system at the end of each forward scheduling cycle in the intraday forward scheduling stage, and construct an intraday forward scheduling model of the grid-side energy storage system based on the intraday scheduling information and the intraday decision variables, and optimize and solve the intraday forward scheduling model according to a set solution cycle to obtain multiple second optimization results; the intraday forward scheduling model contains unexpected constraints on energy and unexpected constraints on power generation and consumption in the intraday forward scheduling stage; each of the second optimization results includes the energy boundary, operating conditions and power generation and consumption boundary of the grid-side energy storage system in a set time period;

[0287] The control unit 205 is used to coordinately control the energy, operating conditions and power generation and consumption of the grid-side energy storage system in the day-ahead planning stage and the intra-day forward scheduling stage based on the first optimization result and each of the second optimization results.

[0288] The present invention provides a day-ahead-intraday coordinated control device for a grid-side energy storage system. The device divides the unexpected dispatching framework of the grid-side energy storage system into two control stages: day-ahead planning and intraday forward dispatching. In the day-ahead planning stage, a day-ahead planning model including unexpected constraints on energy and power generation and consumption is constructed and optimized. Then, the optimization results of the day-ahead planning model are used as boundary conditions. In the intraday forward dispatching stage, an intraday forward dispatching model including unexpected constraints on energy and power generation and consumption is constructed and optimized. Finally, based on the optimization results of the intraday forward dispatching that consider unexpectedness and timing decoupling, the actual control of the energy, operating conditions and power generation and consumption of the grid-side energy storage system is guided. The method provided by the present invention enables the control scheme of the grid-side energy storage system to have the robustness guaranteed by the day-ahead plan on the one hand, and the flexibility brought by the intraday forward dispatching on the other hand. Thereby, the actual control efficiency of the grid-side energy storage system is improved.

[0289] An embodiment of the present invention further provides a storage medium, which includes stored instructions, wherein when the instructions are executed, the device where the storage medium is located is controlled to execute the above-mentioned day-ahead and intra-day coordinated control method of the grid-side energy storage system.

[0290] The embodiment of the present invention further provides an electronic device, the structural diagram of which is shown in FIG. Figure 6 As shown, it specifically includes a memory 301 and one or more instructions 302, wherein the one or more instructions 302 are stored in the memory 301 and are configured to be executed by one or more processors 303 to perform the following operations:

[0291] Determine the unexpected dispatch framework of grid-side energy storage systems;

[0292] The unexpected scheduling framework is divided into a day-ahead planning stage and an intraday forward-looking scheduling stage;

[0293] For the day-ahead planning stage, determine the day-ahead dispatching information and the day-ahead decision variables of the grid-side energy storage system; based on the day-ahead dispatching information and the day-ahead decision variables, construct a day-ahead planning model of the grid-side energy storage system according to the set day-ahead planning cycle, and optimize and solve the day-ahead planning model to obtain a first optimization result; the day-ahead planning model contains unexpected constraints on energy and unexpected constraints on power generation and consumption in the day-ahead planning stage; the first optimization result includes the energy boundary, operating conditions and power generation and consumption boundary of the grid-side energy storage system in each date period of the set date;

[0294] For the intraday forward-looking scheduling stage, the first optimization result is obtained, and the intraday scheduling information and the intraday decision variables of the grid-side energy storage system are determined; the energy boundary of the grid-side energy storage system at the end of each forward-looking scheduling cycle in the intraday forward-looking scheduling stage is constrained by the first optimization result as a boundary condition, and based on the intraday scheduling information and the intraday decision variables, an intraday forward-looking scheduling model of the grid-side energy storage system is constructed, and the intraday forward-looking scheduling model is optimized and solved according to a set solution cycle to obtain multiple second optimization results; the intraday forward-looking scheduling model contains unexpected constraints on energy and unexpected constraints on power generation and consumption in the intraday forward-looking scheduling stage; each of the second optimization results includes the energy boundary, operating conditions and power generation and consumption boundary of the grid-side energy storage system in a set time period;

[0295] Based on the first optimization result and each of the second optimization results, the energy, operating conditions and power generation and consumption of the grid-side energy storage system in the day-ahead planning stage and the intraday forward scheduling stage are coordinated and controlled.

[0296] It should be noted that each embodiment in this specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other. For the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0297] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0298] For the convenience of description, the above device is described as being divided into various units according to their functions. Of course, when implementing the present invention, the functions of each unit can be implemented in the same or multiple software and / or hardware.

[0299] It can be known from the description of the above implementation methods that those skilled in the art can clearly understand that the present invention can be implemented by means of software plus a necessary general hardware platform. Based on such an understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which can be stored in a storage medium such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in the various embodiments of the present invention or certain parts of the embodiments.

[0300] The above is a detailed introduction to the day-ahead and intraday coordinated control method and related equipment of a grid-side energy storage system provided by the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A day-ahead and intra-day coordinated control method for a grid-side energy storage system, characterized in that: include: Determine the unexpected dispatch framework of grid-side energy storage systems; The unexpected scheduling framework is divided into a day-ahead planning stage and an intraday forward-looking scheduling stage; For the day-ahead planning stage, determining day-ahead dispatch information and day-ahead decision variables of the grid-side energy storage system; Based on the day-ahead dispatch information and the day-ahead decision variables, a day-ahead planning model of the grid-side energy storage system is constructed according to a set day-ahead planning period, and the day-ahead planning model is optimized and solved to obtain a first optimization result; The day-ahead planning model includes unexpected energy constraints and unexpected power generation and consumption constraints in the day-ahead planning stage; the first optimization result includes the energy boundary, operating conditions and power generation and consumption boundary of the grid-side energy storage system at each date period of the set date; For the intraday forward-looking scheduling stage, obtaining the first optimization result, and determining the intraday scheduling information and the intraday decision variables of the grid-side energy storage system; The energy boundary of the grid-side energy storage system at the end of each forward scheduling cycle in the intraday forward scheduling stage is constrained by the first optimization result as a boundary condition, and based on the intraday scheduling information and the intraday decision variables, an intraday forward scheduling model of the grid-side energy storage system is constructed, and the intraday forward scheduling model is optimized and solved according to a set solution cycle to obtain multiple second optimization results; the intraday forward scheduling model contains unexpected constraints on energy and unexpected constraints on power generation and consumption in the intraday forward scheduling stage; each of the second optimization results includes the energy boundary, operating conditions and power generation and consumption boundary of the grid-side energy storage system in the set time period; Based on the first optimization result and each of the second optimization results, the energy, operating conditions and power generation and consumption of the grid-side energy storage system in the day-ahead planning stage and the intraday forward scheduling stage are coordinated and controlled.

2. The day-ahead and day-intraday coordinated control method of the grid-side energy storage system according to claim 1, characterized in that: The step of constructing a day-ahead planning model for the grid-side energy storage system based on the day-ahead scheduling information and the day-ahead decision variables according to a set day-ahead planning period includes: Construct the energy boundary constraint D1 of the grid-side energy storage system in the day-ahead planning stage: in: represents the lower bound of the energy of the grid-side energy storage system s in time period t during the day-ahead planning stage; represents the upper bound of the energy of the grid-side energy storage system s in time period t during the day-ahead planning stage; DA represents the day-ahead planning stage; represents the rated capacity of the grid-side energy storage system s, S represents the index set of the grid-side energy storage system s, and T represents the index set of the day-ahead planning stage; Among them, the value of t in D1 is determined by T; Construct the energy state relaxation constraint D2 of the grid-side energy storage system at the end of the day-ahead planning period: in: T in D2 represents the end time period in the day-ahead planning cycle, and the day-ahead planning cycle includes multiple time periods, E s，|T| represents the target energy value of the grid-side energy storage system s in the time period |T|; and is a non-negative variable used to relax the energy state constraint of the grid-side energy storage system s at |T|; Represents the negative deviation between the energy storage value of the grid-side energy storage system s at |T| and the target energy value; Represents the positive deviation between the energy storage value of the grid-side energy storage system s at |T| and the target energy value; Construct a power generation and consumption range constraint D3 for allowing the grid-side energy storage system to operate: in: represents the lower limit variable of power generation of the grid-side energy storage system s in time period t during the day-ahead planning stage; represents the power generation upper limit variable of the grid-side energy storage system s in time period t during the day-ahead planning stage; It is used to indicate whether the power generation lower limit variable of the grid-side energy storage system s in time period t is effective during the day-ahead planning stage. Taking 1 means it works. A value of 0 indicates no effect; It is used to indicate whether the power generation upper limit variable of the grid-side energy storage system s in time period t is effective during the day-ahead planning stage. Taking 1 means it works. A value of 0 indicates no effect; represents the lower limit variable of the power consumption of the grid-side energy storage system s in time period t during the day-ahead planning stage; represents the power consumption upper limit variable of the grid-side energy storage system s in time period t during the day-ahead planning stage; It is used to indicate whether the power consumption lower limit variable of the grid-side energy storage system s in time period t is effective during the day-ahead planning stage. Taking 1 means it works. A value of 0 indicates no effect; Used to indicate whether the power consumption upper limit variable of the grid-side energy storage system s in time period t is effective during the day-ahead planning stage; Taking 1 means it works. A value of 0 indicates no effect; represents the rated power generation of the grid-side energy storage system s; Indicates the rated power consumption of the grid-side energy storage system s; DC represents the power generation state of the grid-side energy storage system s; CH represents the power consumption state of the grid-side energy storage system s; The robust state transfer equation M1 of the grid-side energy storage system in the day-ahead planning stage is constructed: in: represents the power generation efficiency of the grid-side energy storage system s; represents the power efficiency of the grid-side energy storage system s; Δ represents the time granularity; Construct the upper and lower limit constraints D4 of the power generation and consumption of the grid-side energy storage system in the day-ahead planning stage: Used to indicate the planned power generation and consumption status of the grid-side energy storage system s in time period t during the day-ahead planning stage; when When it is 1, it means that the grid-side energy storage system s is planned to operate in the power generation state in time period t; when When it is 0, it means that the grid-side energy storage system s is planned to operate in the power consumption state during time period t; represents the power generation power of the grid-side energy storage system s in time period t during the day-ahead planning stage; represents the power consumption of the grid-side energy storage system s in time period t during the day-ahead planning stage; Based on the D1, D2, D3, D4 and M1, the construction of the day-ahead planning model is completed.

3. The day-ahead and intra-day coordinated control method of the grid-side energy storage system according to claim 2, characterized in that: The intraday forward-looking scheduling model of the grid-side energy storage system is constructed based on the intraday scheduling information and the intraday decision variables, including: Construct the energy boundary constraint D5 of the grid-side energy storage system in the forward scheduling stage within the day: in: represents the lower bound of the energy of the grid-side energy storage system s in the time period τ during the intraday forward scheduling stage; represents the upper bound of the energy of the grid-side energy storage system s in the time period τ during the intraday forward scheduling phase; LA represents the forward-looking scheduling phase within the day; T t represents the set of indicators for the intraday forward-looking scheduling period in the current period t; T t ={t,t+1,…,t+L-1}∩T, where L=16, L is the number of time periods in the intraday forward scheduling cycle; Construct the energy boundary constraint D6 of the grid-side energy storage system at the end of each forward scheduling cycle in the forward scheduling stage within the day: in: T t | represents the end period of the forward scheduling cycle in the current period t; Indicates time period |T t |The lower bound of the day-ahead planning energy; Indicates time period |T t |The upper bound of the day-ahead plan energy; Construct the energy state relaxation constraint D7 of the grid-side energy storage system at the end of the operation day: and is a non-negative variable used to relax the energy state constraint of the grid-side energy storage system s at the end of the operating day; |T in D7 indicates the end of the operating day; E s,|T| represents the target energy value of the grid-side energy storage system s in the time period |T|; Construct a constraint D8 for specifying the intraday forward-looking dispatching power generation and consumption range that allows the grid-side energy storage system to operate: in: represents the lower limit variable of power generation of the grid-side energy storage system s in the period τ during the intraday forward-looking scheduling stage; represents the power generation upper limit variable of the grid-side energy storage system s in the period τ during the intraday forward-looking scheduling stage; It is used to indicate whether the power generation lower limit variable of the grid-side energy storage system s in the period τ is effective during the intraday forward-looking scheduling stage. Taking 1 means it works. A value of 0 indicates no effect; Used to indicate whether the power generation upper limit variable of the grid-side energy storage system s in the period τ is effective during the intraday forward-looking scheduling stage; Taking 1 means it works. A value of 0 indicates no effect; represents the lower limit variable of the power consumption of the grid-side energy storage system s in the period τ during the intraday forward-looking scheduling stage; represents the power consumption upper limit variable of the grid-side energy storage system s in the period τ during the intraday forward-looking scheduling stage; It is used to indicate whether the power consumption lower limit variable of the grid-side energy storage system s in the period τ is effective during the intraday forward-looking scheduling stage. Taking 1 means it works. A value of 0 indicates no effect; Used to indicate whether the power consumption upper limit variable of the grid-side energy storage system s in the time period τ is effective during the intraday forward-looking scheduling stage; Taking 1 means it works. A value of 0 indicates no effect; The robust state transfer equation M2 of the grid-side energy storage system in the intraday forward-looking scheduling phase is constructed: Used to indicate the forward scheduling power generation and consumption status of the grid-side energy storage system s in the period τ during the forward scheduling stage within the day; when When it is 1, it means that the grid-side energy storage system s is in the power generation state during the period τ. when When it is 0, it means that the grid-side energy storage system s is operated in the power consumption state during the period τ in the forward scheduling; represents the power generation power of the grid-side energy storage system s in the period τ during the intraday forward-looking scheduling stage; represents the power consumption of the grid-side energy storage system s in the period τ during the intraday forward-looking scheduling stage; Construct the upper and lower limit constraints D9 of the power generation and consumption of the grid-side energy storage system in the forward-looking scheduling stage within the day: Based on D5, D6, D7, D8, D9 and M2, the construction of the intraday forward-looking scheduling model is completed.

4. The day-ahead and intra-day coordinated control method of the grid-side energy storage system according to claim 1, characterized in that: The determining of the day-ahead scheduling information includes: Acquire a first technical parameter of the grid-side energy storage system in the day-ahead planning stage; Acquire a first initial energy value of the grid-side energy storage system in an initial period of the day-ahead planning cycle and a first target energy value in an end period of the day-ahead planning cycle; Acquire day-ahead uncertain parameter information of the grid-side energy storage system in the day-ahead planning stage; The first technical parameter, the first initial energy value, the second target energy value and the day-ahead uncertain parameter information are determined as the day-ahead scheduling information.

5. The day-ahead and day-intraday coordinated control method of the grid-side energy storage system according to claim 1, characterized in that: The determining of intraday scheduling information includes: Acquire a second technical parameter of the grid-side energy storage system during the intraday forward scheduling phase; Acquire a second initial energy value of the grid-side energy storage system in the initial period of each of the forward scheduling cycles in the intraday forward scheduling phase and a second target energy value of the final period of each of the forward scheduling periods; Acquiring intraday uncertain parameter information of the grid-side energy storage system during the intraday forward scheduling phase; The second counting parameter, each of the second initial energy values, each of the second target energy values ​​and the intra-day uncertain parameter information are determined as the intra-day scheduling information.

6. The day-ahead and intra-day coordinated control method of the grid-side energy storage system according to claim 1, characterized in that: The operating conditions include power supply conditions, load conditions and dual conditions.

7. The day-ahead and intra-day coordinated control method of the grid-side energy storage system according to claim 1, characterized in that: The unexpected scheduling framework is divided into a day-ahead planning stage and an intraday forward-looking scheduling stage, including: Determining the operation day of the grid-side energy storage system according to the control time scale of the grid-side energy storage system; Determine the day before the operation day as the day-ahead planning stage; The intermediate period from zero o'clock of the operating day to zero o'clock of the next operating day is determined as the intraday forward-looking scheduling stage.

8. A day-ahead and intra-day coordinated control device for a grid-side energy storage system, characterized in that: include: A determination unit, used to determine an unexpected dispatch framework of a grid-side energy storage system; A division unit, used for dividing the unexpected scheduling framework into a day-ahead planning stage and an intraday forward scheduling stage; A first construction unit is used to determine the day-ahead scheduling information and the day-ahead decision variables of the grid-side energy storage system for the day-ahead planning stage; Based on the day-ahead dispatch information and the day-ahead decision variables, a day-ahead planning model of the grid-side energy storage system is constructed according to a set day-ahead planning period, and the day-ahead planning model is optimized and solved to obtain a first optimization result; The day-ahead planning model includes unexpected energy constraints and unexpected power generation and consumption constraints in the day-ahead planning stage; the first optimization result includes the energy boundary, operating conditions and power generation and consumption boundary of the grid-side energy storage system at each date period of the set date; A second construction unit is used to obtain the first optimization result for the intraday forward-looking scheduling stage, and determine the intraday scheduling information and the intraday decision variables of the grid-side energy storage system; The energy boundary of the grid-side energy storage system at the end of each forward scheduling cycle in the intraday forward scheduling stage is constrained by the first optimization result as a boundary condition, and based on the intraday scheduling information and the intraday decision variables, an intraday forward scheduling model of the grid-side energy storage system is constructed, and the intraday forward scheduling model is optimized and solved according to a set solution cycle to obtain multiple second optimization results; the intraday forward scheduling model contains unexpected constraints on energy and unexpected constraints on power generation and consumption in the intraday forward scheduling stage; each of the second optimization results includes the energy boundary, operating conditions and power generation and consumption boundary of the grid-side energy storage system in the set time period; A control unit is used to coordinately control the energy, operating conditions and power generation and consumption of the grid-side energy storage system in the day-ahead planning stage and the intra-day forward scheduling stage based on the first optimization result and each of the second optimization results.

9. A storage medium, characterized in that: The storage medium includes stored instructions, wherein when the instructions are executed, the device where the storage medium is located is controlled to execute the day-ahead and intra-day coordinated control method of the grid-side energy storage system according to any one of claims 1 to 7.

10. An electronic device, characterized in that: It includes a memory and one or more instructions, wherein the one or more instructions are stored in the memory and are configured to be executed by one or more processors to execute the day-ahead and intra-day coordinated control method of the grid-side energy storage system as described in any one of claims 1 to 7.

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