A source-grid-load-storage-province coordination method and system for new energy consumption

Abstract

A source-grid-load-storage-province-land collaborative regulation method and system for new energy consumption, the method comprising calculating the power transmission plan value between each unit and the province-land; calculating the regional power grid deviation power through the actual wind power and photovoltaic power generation of the regional power grid, correcting the planned value of power transmission between the province-land, and realizing the power balance of the regional power grid by using the energy storage and multi-element flexible resources of the provincial and regional dispatching; taking the provincial dispatching as the upper decision maker, and cooperating with the regional dispatching to suppress the power grid fluctuation in the case of power deviation of the regional dispatching according to the pre-established provincial dispatching constraint condition; taking the regional dispatching as the lower decision maker, and completing the planned output of the regional dispatching according to the pre-established regional dispatching constraint condition, if the actual output of the regional dispatching is greater than the planned output, the excess power is transmitted to the provincial dispatching for scheduling, and if the actual output is less than the planned output, the power shortage is supplemented through the scheduling of the provincial dispatching. The application can solve the problems of new energy output fluctuation and regional power deviation.

Description

Technical Field

[0001] This invention belongs to the field of power automation technology, specifically relating to a source-grid-load-storage provincial and local coordinated control method and system for renewable energy consumption. Background Technology

[0002] With the vigorous development of new energy power generation, the grid connection rate of new energy power generation in the power system is relatively high, and more new energy power generation will be connected to the grid in the future. However, new energy power generation is difficult to predict, its output fluctuates greatly, and it is easily affected by environmental factors. The active and reactive power balance of the power system is difficult to coordinate and optimize, controllable resources are difficult to fully utilize, and regional coordination and regulation are difficult, resulting in the inefficient absorption of distributed power sources.

[0003] Flexible resources refer to resources that can increase the flexibility, resilience, and adaptability of energy supply and demand systems, serving the dynamic supply and demand balance of energy systems. Systems can achieve their own supply and demand balance through the rapid and accurate regulation of flexible resources, while simultaneously meeting diverse energy supply and demand needs. Flexible resources offer significant advantages as rapid response targets. They are diverse, including electric vehicles, industrial loads, small hydropower stations, etc., with enormous dispatch potential awaiting further utilization.

[0004] Currently, regional power grids struggle to absorb a high proportion of distributed renewable energy generation. Summary of the Invention

[0005] The purpose of this invention is to provide a source-grid-load-storage provincial-regional coordinated regulation method and system for renewable energy consumption, which utilizes flexible resources to assist regional power grids in absorbing renewable energy and solves problems such as renewable energy output fluctuations and regional power deviations.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] Firstly, a method for coordinated regulation of energy sources, grids, loads, and storage across provinces and regions, aimed at facilitating the integration of new energy sources, is provided, including:

[0008] Based on the pre-established day-ahead power generation plan model, the power generation plan of each unit and the planned value of power transmission between provinces and regions are calculated by using the load reported by each region, wind power and photovoltaic power generation, and reserve capacity.

[0009] Based on the pre-established intraday provincial-local power transmission optimization model, the deviation power of the regional power grid is calculated by the actual wind power and photovoltaic power generation of the regional power grid, and the planned value of intraday power transmission between provinces and regions is corrected. By utilizing the energy storage and diverse flexible resources of the provincial and regional dispatch centers, the power balance of the regional power grid is achieved.

[0010] The provincial dispatch center acts as the upper-level decision-maker, and based on pre-established provincial dispatch center constraints, it works in concert with the local dispatch center to suppress grid fluctuations when power deviations occur.

[0011] The regional dispatch center acts as the lower-level decision-maker, completing the planned output of the regional dispatch center based on pre-established regional dispatch constraints. If the actual output of the regional dispatch center is greater than the planned output, the excess power is transmitted to the provincial dispatch center for scheduling. If the actual output is less than the planned output, the power deficit is supplemented through scheduling by the provincial dispatch center.

[0012] As a preferred embodiment, the process for establishing the day-ahead power generation planning model is as follows:

[0013] The objective function is designed to minimize the total day-ahead cost of provincial and regional surveys, and the expression is as follows:

[0014] minC be =C p,be +C a,be

[0015] In the formula: C p,be For provincial adjustment of day-ahead costs; C a,be For the day-ahead cost of the local survey;

[0016] The provincial dispatch day-ahead cost includes the power generation cost and standby cost of the provincial dispatch units, and the calculation formula is as follows:

[0017] C p,be =C p,G +C p.R

[0018] In the formula: C p,G C p.R The generation cost and standby cost of the provincial dispatch unit are respectively calculated using the following expressions:

[0019]

[0020]

[0021] In the formula, a i b i c i The power generation cost coefficient of provincial dispatch unit i; These are the positive and negative rotating reserve values ​​of provincial dispatch unit i at time t, respectively. These are the positive and negative standby cost coefficients for unit i, respectively;

[0022] The day-ahead cost of the regional dispatch center includes the cost of conventional dispatch units and standby costs, and the calculation formula is as follows:

[0023]

[0024] Among them, Cj,G C j.R Let $\beginning$ be the power generation cost and standby cost of the local dispatch unit j, respectively. The calculation expressions are as follows:

[0025]

[0026]

[0027] In the formula, a j,k b j,k c j,k The power generation cost coefficient of the traditional unit k of the ground control j; The positive and negative rotational reserve values ​​of the traditional unit k of the ground control j at time t; These are the positive and negative standby cost coefficients for the traditional unit k of the regional dispatch j, respectively.

[0028] As a preferred option, the process of establishing the intraday power transmission optimization model is as follows:

[0029] The objective function for minimizing the total daily cost of provincial and regional surveys is calculated as follows:

[0030] minC in =C p,in +C a,in

[0031] In the formula: C p,in To adjust the total cost within the day; C a,in This represents the total cost of the local survey within a day.

[0032] The total daily cost of provincial dispatch includes energy storage costs and flexible resource costs, calculated as follows:

[0033] C p,in =C p,S +C p,res

[0034] In the formula: C p,S To save on energy storage costs; C p,res To adjust the costs of diversified and flexible resources in the province;

[0035]

[0036]

[0037] In the formula: q p,s,ch,t q p,s,dis,t To reduce the charging and discharging costs of energy storage power stations; q p,a,ch,t q p,a,dis,t To reduce the cost of consuming and discharging flexible resources;

[0038] The total daily cost of geodetic survey is the cost of wind and solar curtailment, calculated as follows:

[0039]

[0040] In the formula: C j,ws,t The cost of wind and solar power curtailment is calculated using the following expression:

[0041] C j,ws,t =ρ j,ws,t P j,ws,t

[0042] In the formula: ρ j,ws,t To account for the cost of wind and solar power curtailment, P j,ws,t To predict the amount of wind and solar power curtailed.

[0043] As a preferred embodiment, the steps of coordinating with the provincial dispatch center as the upper-level decision-maker to suppress grid fluctuations in the event of power deviations in the regional dispatch center, based on pre-established provincial dispatch center constraints, include: The provincial dispatch center formulates power generation plans and power outputs for both provincial and regional dispatch centers based on load forecasts reported by various regions and wind and solar power generation forecasts; the provincial dispatch center constraints at this time are as follows:

[0044] The output constraint of the provincial dispatching unit is expressed as follows:

[0045] P p,i,min ≤P p,i,t ≤P p,i,max

[0046] In the formula: P p,i,min To achieve the minimum output of the provincial-level generating units, P p,i,t To contribute to the provincial power generation unit plan, P p,i,max To maximize the output of the provincial power generation units;

[0047] The provincial dispatch unit ramp-up constraint is expressed as follows:

[0048] r d,i ≤P p,i,t+1 -P p,i,t ≤r u,i

[0049] In the formula: r d,i To improve the downhill climbing ability of the provincial-level generating units, r u,i To enhance the uphill climbing ability of the provincial power generation units;

[0050] The standby unit constraint is expressed as follows:

[0051]

[0052]

[0053] In the formula: The reserve capacity of the provincial power generation units is as planned. This represents the maximum standby capacity of the provincial power generation units. The reserve plan value for provincial-level generating units. This represents the maximum negative reserve capacity of the provincial power generation units.

[0054] The provincial power balance constraint is expressed as follows:

[0055]

[0056] Line safety constraints, expressed as:

[0057]

[0058] In the formula: P represents the power transmitted from the provincial dispatch center to the regional dispatch center recently. p,j,min P is the minimum power flow value for the tie line. p,j,max This represents the maximum power flow value of the connecting line.

[0059] As a preferred option, the process of using the provincial dispatch center as the upper-level decision-maker, and coordinating with the local dispatch center to suppress grid fluctuations when power deviations occur, based on pre-established provincial dispatch center constraints, includes the following steps: If the local dispatch center experiences a discrepancy between actual load and the day-ahead forecast due to forecasting errors, or if weather conditions cause a deviation between the actual output and planned output of its renewable energy units, and the local dispatch center cannot resolve the issue with its own units, it will seek assistance from the provincial dispatch center. The power deviation information will be aggregated and sent to the provincial dispatch center. After referring to information from various dispatch centers and considering its own resource situation, the provincial dispatch center will reissue relevant control targets to the local dispatch center. The provincial dispatch center constraints at this time are as follows:

[0060] Provincial-level energy storage constraints include energy storage power constraints and energy storage charge rate constraints for provincial-level energy storage power stations.

[0061] The energy storage power constraint expression is as follows:

[0062] 0≤P p,s,ch,t ≤X p,s,ch,t P p,s,ch,max

[0063] 0≤P p,s,dis,t ≤X p,s,dis,t P p,s,dis,max

[0064] 0≤X p,s,ch,t +X p,s,dis,t ≤1

[0065] In the formula, P p,s,ch,max P p,s,dis,max X represents the maximum charging power and maximum discharging power of the energy storage system s in the provincial grid; p,s,ch,t X p,s,dis,t Let X be a 0-1 variable representing the charge / discharge state of the stored energy at time t.p,s,ch,t =1 and X p,s,dis,t When X = 0, the energy storage is in a charging state. p,s,ch,t =0 and X p,s,dis,t When = 1, the energy storage is in a discharging state;

[0066] Energy storage charge rate constraints are used to avoid overcharging and over-discharging of energy storage, and the expression is as follows:

[0067] SOC p,s,min ≤SOC p,s,t ≤SOC p,s,max

[0068]

[0069] Among them, SOC p,s,min SOC p,s,max The minimum and maximum charge rates of energy storage s; SOC p,s,0 η represents the initial charge rate of the energy storage power station s; p,s,ch η p,s,dis E represents the charge / discharge efficiency of energy storage; Δt represents the time interval; E p,s Let be the energy storage capacity of energy storage power station s;

[0070] Flexible resource constraints, including power absorption constraints and discharge constraints of flexible resources;

[0071] The power absorption constraint expression for flexible resources is as follows:

[0072] 0≤P p,a,ch,t ≤X p,a,ch,t P p,a,ch,max

[0073] Among them, P p,a,ch,max To maximize the absorption capacity of the province's flexible resource a, X p,a,ch,t A 0-1 variable representing the flexible resource consumption status;

[0074] The discharge constraint expression for flexible resources is as follows:

[0075] 0≤P p,a,dis,t ≤X p,a,dis,t P p,a,dis,max

[0076] Among them, P p,a,dis,max To utilize the province's flexible resources, the maximum discharge power of X p,a,dis,t For flexible resource discharge states, use 0-1 variables;

[0077] 0≤X p,a,ch,t +X p,a,dis,t ≤1

[0078] The provincial power balance constraint is expressed as follows:

[0079]

[0080] In the formula: The actual power transmitted from the provincial power grid to region j;

[0081] Line safety constraints are expressed as follows:

[0082]

[0083] In the formula: P p,j,min P is the minimum power flow value for the tie line. p,j,max This represents the maximum power flow value of the connecting line.

[0084] As a preferred embodiment, the local dispatch center acts as the lower-level decision-maker. Based on pre-established local dispatch center constraints, it completes its planned power output. If the actual output exceeds the planned output, the excess power is transferred to the provincial dispatch center for scheduling. Conversely, if the actual output is less than the planned output, the power deficit is supplemented through the provincial dispatch center. In this step, the local dispatch center achieves power balance in its region through power transmission from the provincial dispatch center and the generation of its own generating units. The local dispatch center constraints at this time are as follows:

[0085] The power balance constraint of the ground control system is expressed as follows:

[0086]

[0087] In the formula: Let K be the power generation capacity of the conventional unit k of the ground control station j; K is the number of conventional units of the ground control station j. The generating capacity of the renewable energy unit r of the local dispatch center j; R is the number of renewable energy units of the local dispatch center j; P plan,j,t The load value predicted by the regional survey; This refers to the power that the provincial power dispatcher plans to transmit to the region J day before the deadline;

[0088] The output constraint of traditional generator units in the regional dispatching system is expressed as follows:

[0089]

[0090] In the formula: This is the minimum output of the regional control unit. To the maximum output of the regional control unit;

[0091] The ramp-up constraint for traditional generator units in regional dispatching is expressed as follows:

[0092]

[0093] In the formula: r d,j,k For the downhill climbing ability of the ground control unit, r u,j,k This enhances the hill-climbing capability of the regional dispatching units;

[0094] The constraint on the standby generator unit of the regional dispatch center is expressed as follows:

[0095]

[0096]

[0097] In the formula: Positive standby capacity provided for regional power dispatch units This represents the maximum positive standby capacity of the regional dispatching units. Negative reserve capacity provided for regional power dispatch units. This represents the maximum negative standby capacity of the regional dispatching units.

[0098] As a preferred embodiment, the local dispatch center acts as the lower-level decision-maker. Based on pre-established local dispatch center constraints, it completes its planned power output. If the actual output exceeds the planned output, the excess power is transferred to the provincial dispatch center for scheduling. Conversely, if the actual output is less than the planned output, the provincial dispatch center compensates for the power deficit. Within the same day, without altering the power generation plans of both the provincial and local dispatch centers, the provincial dispatch center redistributes power to achieve regional grid power balance. For situations where excessive renewable energy generation or reduced load leads to excessive actual power generation that cannot be absorbed, the provincial dispatch center assists the local dispatch center in determining the amount of wind and solar power curtailment. Local dispatch center constraints include:

[0099] The regional power balance constraint is expressed as follows:

[0100]

[0101] In the formula: The actual power generation of new energy sources in the local area; P represents the actual power transmitted from the provincial dispatch center to the regional dispatch center within a given day. ac,j,t This represents the actual load value of the local dispatch center j.

[0102] The constraint on wind and solar power curtailment is expressed as follows:

[0103]

[0104] In the formula: P j,ws,t This represents the actual amount of wind and solar power curtailed during the day.

[0105] Secondly, a source-grid-load-storage provincial-local coordinated control system for renewable energy consumption is provided, including:

[0106] The day-ahead power generation plan calculation module is used to calculate the power generation plan of each unit and the planned value of power transmission between provinces and regions based on the pre-established day-ahead power generation plan model, the load reported by each region, wind power and photovoltaic power generation, and reserve capacity.

[0107] The intraday provincial-local power transmission optimization module is used to calculate the regional power grid deviation power based on the actual wind and photovoltaic power generation of the regional power grid according to the pre-established intraday provincial-local power transmission optimization model, correct the planned value of the day-ahead power transmission between provinces and regions, and realize the power balance of the regional power grid by utilizing the energy storage and diverse flexible resources of the provincial and regional dispatch centers.

[0108] The provincial dispatch allocation module is used to treat the provincial dispatch center as the upper-level decision-maker and, based on pre-established provincial dispatch constraints, coordinate with the local dispatch center to suppress grid fluctuations when power deviations occur.

[0109] The regional dispatch absorption module is used to make the regional dispatch center the lower-level decision-maker. Based on the pre-established regional dispatch center constraints, it completes the planned output of the regional dispatch center. If the actual output of the regional dispatch center is greater than the planned output, the excess power is transmitted to the provincial dispatch center for scheduling. If the actual output is less than the planned output, the power deficit is supplemented through the scheduling of the provincial dispatch center.

[0110] As a preferred embodiment, the day-ahead power generation plan calculation module is designed with the objective function of minimizing the total day-ahead cost of the provincial and regional dispatch centers. The calculation expression is as follows:

[0111] minC be =C p,be +C a,be

[0112] In the formula: C p,be For provincial adjustment of day-ahead costs; C a,be For the day-ahead cost of the local survey;

[0113] The provincial dispatch day-ahead cost includes the power generation cost and standby cost of the provincial dispatch units, and the calculation formula is as follows:

[0114] C p,be =C p,G +C p.R

[0115] In the formula: C p,G C p.R The generation cost and standby cost of the provincial dispatch unit are respectively calculated using the following expressions:

[0116]

[0117]

[0118] In the formula, a i b i c i The power generation cost coefficient of provincial dispatch unit i; These are the positive and negative rotating reserve values ​​of provincial dispatch unit i at time t, respectively. These are the positive and negative standby cost coefficients for unit i, respectively;

[0119] The day-ahead cost of the regional dispatch center includes the cost of conventional dispatch units and standby costs, and the calculation formula is as follows:

[0120]

[0121] Among them, C j,G C j.R Let $\beginning$ be the power generation cost and standby cost of the local dispatch unit j, respectively. The calculation expressions are as follows:

[0122]

[0123]

[0124] In the formula, a j,k b j,k c j,k The power generation cost coefficient of the traditional unit k of the ground control j; The positive and negative rotational reserve values ​​of the traditional unit k of the ground control j at time t; These are the positive and negative standby cost coefficients for the traditional unit k of the regional dispatch j, respectively.

[0125] As a preferred option, the intraday power transmission optimization module is designed with the objective function of minimizing the total intraday cost of provincial and regional dispatching, and the calculation expression is as follows:

[0126] minC in =C p,in +C a,in

[0127] In the formula: C p,in To adjust the total cost within the day; C a,in This represents the total cost of the local survey within a day.

[0128] The total daily cost of provincial dispatch includes energy storage costs and flexible resource costs, calculated as follows:

[0129] C p,in =C p,S +C p,res

[0130] In the formula: C p,S To save on energy storage costs; C p,res To adjust the costs of diversified and flexible resources in the province;

[0131]

[0132]

[0133] In the formula: q p,s,ch,t q p,s,dis,tTo reduce the charging and discharging costs of energy storage power stations; q p,a,ch,t q p,a,dis,t To reduce the cost of consuming and discharging flexible resources;

[0134] The total daily cost of geodetic survey is the cost of wind and solar curtailment, calculated as follows:

[0135]

[0136] In the formula: C j,ws,t The cost of wind and solar power curtailment is calculated using the following expression:

[0137] C j,ws,t =ρ j,ws,t P j,ws,t

[0138] In the formula: ρ j,ws,t To account for the cost of wind and solar power curtailment, P j,ws,t To predict the amount of wind and solar power curtailed.

[0139] As a preferred embodiment, the provincial dispatch allocation module pre-establishes the following provincial dispatch constraints:

[0140] The output constraint of the provincial dispatching unit is expressed as follows:

[0141] P p,i,min ≤P p,i,t ≤P p,i,max

[0142] In the formula: P p,i,min To achieve the minimum output of the provincial-level generating units, P p,i,t To contribute to the provincial power generation unit plan, P p,i,max To maximize the output of the provincial power generation units;

[0143] The provincial dispatch unit ramp-up constraint is expressed as follows:

[0144] r d,i ≤P p,i,t+1 -P p,i,t ≤r u,i

[0145] In the formula: r d,i To improve the downhill climbing ability of the provincial-level generating units, r u,i To enhance the uphill climbing ability of the provincial power generation units;

[0146] The standby unit constraint is expressed as follows:

[0147]

[0148]

[0149] In the formula: The reserve capacity of the provincial power generation units is as planned. This represents the maximum standby capacity of the provincial power generation units. The reserve plan value for provincial-level generating units. This represents the maximum negative reserve capacity of the provincial power generation units.

[0150] The provincial power balance constraint is expressed as follows:

[0151]

[0152] Line safety constraints, expressed as:

[0153]

[0154] In the formula: P represents the power transmitted from the provincial dispatch center to the regional dispatch center recently. p,j,min P is the minimum power flow value for the tie line. p,j,max This represents the maximum power flow value of the connecting line;

[0155] Provincial-level energy storage constraints include energy storage power constraints and energy storage charge rate constraints for provincial-level energy storage power stations.

[0156] The energy storage power constraint expression is as follows:

[0157] 0≤P p,s,ch,t ≤X p,s,ch,t P p,s,ch,max

[0158] 0≤P p,s,dis,t ≤X p,s,dis,t P p,s,dis,max

[0159] 0≤X p,s,ch,t +X p,s,dis,t ≤1

[0160] In the formula, P p,s,ch,max P p,s,dis,max X represents the maximum charging power and maximum discharging power of the energy storage system s in the provincial grid; p,s,ch,t X p,s,dis,t Let X be a 0-1 variable representing the charge / discharge state of the stored energy at time t. p,s,ch,t =1 and X p,s,dis,t When X = 0, the energy storage is in a charging state. p,s,ch,t =0 and X p,s,dis,t When = 1, the energy storage is in a discharging state;

[0161] Energy storage charge rate constraints are used to avoid overcharging and over-discharging of energy storage, and the expression is as follows:

[0162] SOC p,s,min ≤SOC p,s,t ≤SOC p,s,max

[0163]

[0164] Among them, SOC p,s,min SOC p,s,max The minimum and maximum charge rates of energy storage s; SOC p,s,0 η represents the initial charge rate of the energy storage power station s; p,s,ch η p,s,dis E represents the charge / discharge efficiency of energy storage; Δt represents the time interval; E p,s Let be the energy storage capacity of energy storage power station s;

[0165] Flexible resource constraints, including power absorption constraints and discharge constraints of flexible resources;

[0166] The power absorption constraint expression for flexible resources is as follows:

[0167] 0≤P p,a,ch,t ≤X p,a,ch,t P p,a,ch,max

[0168] Among them, P p,a,ch,max To maximize the absorption capacity of the province's flexible resource a, X p,a,ch,t A 0-1 variable representing the flexible resource consumption status;

[0169] The discharge constraint expression for flexible resources is as follows:

[0170] 0≤P p,a,dis,t ≤X p,a,dis,t P p,a,dis,max

[0171] Among them, P p,a,dis,max To utilize the province's flexible resources, the maximum discharge power of X p,a,dis,t For flexible resource discharge states, use 0-1 variables;

[0172] 0≤X p,a,ch,t +X p,a,dis,t ≤1

[0173] The provincial power balance constraint is expressed as follows:

[0174]

[0175] In the formula: The actual power transmitted from the provincial power grid to region j;

[0176] Line safety constraints are expressed as follows:

[0177]

[0178] In the formula: P p,j,min For minimum power flow in the connecting line, P p,j,max The largest current flows through the connecting line.

[0179] As a preferred embodiment, the pre-established geological survey constraints in the geological survey absorption module include:

[0180] The power balance constraint of the ground control system is expressed as follows:

[0181]

[0182] In the formula: Let K be the power generation capacity of the conventional unit k of the ground control station j; K is the number of conventional units of the ground control station j. The generating capacity of the renewable energy unit r of the local dispatch center j; R is the number of renewable energy units of the local dispatch center j; P plan,j,t The load value predicted by the regional survey; This refers to the power that the provincial power dispatcher plans to transmit to the region J day before the deadline;

[0183] The output constraint of traditional generator units in the regional dispatching system is expressed as follows:

[0184]

[0185] In the formula: This is the minimum output of the regional control unit. To the maximum output of the regional control unit;

[0186] The ramp-up constraint for traditional generator units in regional dispatching is expressed as follows:

[0187]

[0188] In the formula: r d,j,k For the downhill climbing ability of the ground control unit, r u,j,k This enhances the hill-climbing capability of the regional dispatching units;

[0189] The constraint on the standby generator unit of the regional dispatch center is expressed as follows:

[0190]

[0191]

[0192] In the formula: Positive standby capacity provided for regional power dispatch units This represents the maximum positive standby capacity of the regional dispatching units. Negative reserve capacity provided for regional power dispatch units. This represents the maximum negative reserve capacity of the regional dispatching units;

[0193] The regional power balance constraint is expressed as follows:

[0194]

[0195] In the formula: The actual power generation of new energy sources in the local area; P represents the actual power transmitted from the provincial dispatch center to the regional dispatch center within a given day. ac,j,t This represents the actual load value of the local dispatch center j.

[0196] The constraint on wind and solar power curtailment is expressed as follows:

[0197]

[0198] In the formula: P j,ws,t This represents the actual amount of wind and solar power curtailed during the day.

[0199] Thirdly, an electronic device is provided, comprising:

[0200] Memory, storing at least one instruction; and

[0201] The processor executes the instructions stored in the memory to implement the source-grid-load-storage provincial-local coordinated regulation method for new energy consumption.

[0202] Fourthly, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, it implements the source-grid-load-storage province-local coordinated regulation method for new energy consumption.

[0203] Compared with the prior art, the first aspect of the present invention has at least the following beneficial effects:

[0204] By fully utilizing the diverse and flexible resources with enormous dispatch potential, this invention assists provincial and regional dispatch centers in absorbing new energy sources. Based on the reported load, wind and solar power generation, and reserve capacity from various regions, the planned power generation of each unit and the planned power transmission between provinces and regions are calculated. Then, the actual wind and solar power generation of the regional power grid is used to calculate the regional grid deviation power, correcting the planned power transmission between provinces and regions. By utilizing the energy storage and diverse flexible resources of provincial and regional dispatch centers, power balance in the regional power grid is achieved. In this invention's source-grid-load-storage provincial-regional coordinated control method for new energy absorption, the provincial dispatch center, as the upper-level decision-maker, coordinates with the regional dispatch center to solve problems when power deviations occur. Simultaneously, when fluctuations occur across the entire grid, it considers the resources of various dispatch centers, assisting the provincial dispatch center in suppressing new energy fluctuations and coordinating to ensure the safe and economical operation of the system. The regional dispatch center, as the lower-level decision-maker, first needs to meet the regional power demand and complete the planned output. If the actual output of the regional dispatch center exceeds the planned output, the excess power can be transmitted to the provincial dispatch center for further dispatch. When the actual output is less than the planned output, the provincial dispatch center can be consulted to resolve the power deficit. This invention can solve problems such as fluctuations in new energy output and regional power deviations.

[0205] It is understood that the beneficial effects of the second to fourth aspects mentioned above can be found in the relevant descriptions in the first aspect mentioned above, and will not be repeated here. Attached Figure Description

[0206] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0207] Figure 1 Data flow diagram of the source-grid-load-storage provincial-local coordinated regulation method for renewable energy consumption according to an embodiment of the present invention;

[0208] Figure 2 Flowchart of a source-grid-load-storage provincial-local coordinated regulation method for renewable energy consumption according to an embodiment of the present invention;

[0209] Figure 3 An embodiment of the present invention shows the day-ahead load forecast and actual load curves for a certain region;

[0210] Figure 4 This invention provides an embodiment of a power transmission curve between a certain region and the provincial dispatch plan, and the actual power transmission curve.

[0211] Figure 5 The present invention provides a structural block diagram of a source-grid-load-storage provincial-local coordinated regulation system for renewable energy consumption. Detailed Implementation

[0212] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0213] Furthermore, in the description of this application and the appended claims, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0214] Example 1

[0215] like Figure 1As shown, this invention presents a source-grid-load-storage provincial-local coordinated control method for renewable energy consumption. Through provincial-local coordination, it utilizes flexible resources to assist regional power grids in absorbing renewable energy. Each regional dispatch center reports its local power imbalance to the provincial dispatch center. This power imbalance refers to a mismatch between the actual power generation and the actual load in a region. If the actual power generation exceeds the load, the excess power is transmitted to the provincial dispatch center. Based on the reported information, the provincial dispatch center first addresses the power generation shortage in some regions, and then considers the region's absorption capacity to absorb the excess power. If the reported power cannot meet the needs of some regions, the provincial dispatch center considers increasing the output of traditional generating units and utilizing flexible loads in each region to resolve the issue.

[0216] Please see Figure 2 The source-grid-load-storage provincial-local coordinated regulation method for renewable energy consumption, as described in this embodiment of the invention, includes the following steps:

[0217] S1. Based on the pre-established day-ahead power generation plan model, calculate the power generation plan of each unit and the planned value of power transmission between provinces and regions by using the load reported by each region, wind power and photovoltaic power generation, and reserve capacity.

[0218] S2. Based on the pre-established intraday provincial-local power transmission optimization model, calculate the regional power grid deviation power through the actual wind and photovoltaic power generation of the regional power grid, correct the planned value of intraday power transmission between provinces and regions, and utilize the energy storage and diverse flexible resources of the provincial and regional dispatch centers to achieve power balance of the regional power grid.

[0219] S3. Taking the provincial dispatch center as the upper-level decision-maker, and based on the pre-established provincial dispatch center constraints, coordinate with the local dispatch center to suppress grid fluctuations when power deviations occur.

[0220] S4. The local dispatch center acts as the lower-level decision-maker. Based on the pre-established constraints of the local dispatch center, it completes the planned output of the local dispatch center. If the actual output of the local dispatch center is greater than the planned output, the excess power is transmitted to the provincial dispatch center for scheduling. If the actual output is less than the planned output, the power deficit is supplemented through the scheduling of the provincial dispatch center.

[0221] In one possible implementation, the process of establishing the day-ahead power generation planning model in step S1 is as follows:

[0222] The objective function is designed to minimize the total day-ahead cost of provincial and regional surveys, and the expression is as follows:

[0223] minC be =C p,be +C a,be

[0224] In the formula: C p,be For provincial adjustment of day-ahead costs; C a,be For the day-ahead cost of the local survey;

[0225] The provincial dispatch day-ahead cost includes the power generation cost and standby cost of the provincial dispatch units, and the calculation formula is as follows:

[0226] C p,be =C p,G +C p.R

[0227] In the formula: C p,G C p.R The generation cost and standby cost of the provincial dispatch unit are respectively calculated using the following expressions:

[0228]

[0229]

[0230] In the formula, a i b i c i The power generation cost coefficient of provincial dispatch unit i; These are the positive and negative rotating reserve values ​​of provincial dispatch unit i at time t, respectively. These are the positive and negative standby cost coefficients for unit i, respectively;

[0231] The day-ahead cost of the regional dispatch center includes the cost of conventional dispatch units and standby costs, and the calculation formula is as follows:

[0232]

[0233] Among them, C j,G C j.R Let $\beginning$ be the power generation cost and standby cost of the local dispatch unit j, respectively. The calculation expressions are as follows:

[0234]

[0235]

[0236] In the formula, a j,k b j,k c j,k The power generation cost coefficient of the traditional unit k of the ground control j; The positive and negative rotational reserve values ​​of the traditional unit k of the ground control j at time t; These are the positive and negative standby cost coefficients for the traditional unit k of the regional dispatch j, respectively.

[0237] In one possible implementation, the process of establishing the intraday power transmission optimization model in step S2 is as follows:

[0238] The objective function for minimizing the total daily cost of provincial and regional surveys is calculated as follows:

[0239] minC in =C p,in +C a,in

[0240] In the formula: C p,in To adjust the total cost within the day; C a,in This represents the total cost of the local survey within a day.

[0241] The total daily cost of provincial dispatch includes energy storage costs and flexible resource costs, calculated as follows:

[0242] C p,in =C p,S +C p,res

[0243] In the formula: C p,S To save on energy storage costs; C p,res To adjust the costs of diversified and flexible resources in the province;

[0244]

[0245]

[0246] In the formula: q p,s,ch,t q p,s,dis,t To reduce the charging and discharging costs of energy storage power stations; q p,a,ch,t q p,a,dis,t To reduce the cost of consuming and discharging flexible resources;

[0247] The total daily cost of geodetic survey is the cost of wind and solar curtailment, calculated as follows:

[0248]

[0249] In the formula: C j,ws,t The cost of wind and solar power curtailment is calculated using the following expression:

[0250] C j,ws,t =ρ j,ws,t P j,ws,t

[0251] In the formula: ρ j,ws,t To account for the cost of wind and solar power curtailment, P j,ws,t To predict the amount of wind and solar power curtailed.

[0252] In one possible implementation, in step S3, the provincial dispatch center, as the upper-level decision-maker, coordinates with the local dispatch center to solve the problem when power deviation occurs. At the same time, when fluctuations occur across the entire network, it considers the resources of various dispatch centers, assists the provincial dispatch center in suppressing the fluctuations in renewable energy processing, and makes overall arrangements to ensure the safe and economical operation of the system.

[0253] Recently, the provincial dispatch center formulated power generation plans and capacities for provincial and regional dispatch units based on load forecasts reported by various regions, as well as wind and solar power generation forecasts. The provincial dispatch center's constraints at this time are as follows:

[0254] The output constraint of the provincial dispatching unit is expressed as follows:

[0255] P p,i,min ≤P p,i,t ≤P p,i,max

[0256] In the formula: P p,i,min To achieve the minimum output of the provincial-level generating units, P p,i,t To contribute to the provincial power generation unit plan, P p,i,max To maximize the output of the provincial power generation units;

[0257] The provincial dispatch unit ramp-up constraint is expressed as follows:

[0258] r d,i ≤P p,i,t+1 -P p,i,t ≤r u,i

[0259] In the formula: r d,i To improve the downhill climbing ability of the provincial-level generating units, r u,i To enhance the uphill climbing ability of the provincial power generation units;

[0260] The standby unit constraint is expressed as follows:

[0261]

[0262]

[0263] In the formula: The reserve capacity of the provincial power generation units is as planned. This represents the maximum standby capacity of the provincial power generation units. The reserve plan value for provincial-level generating units. This represents the maximum negative reserve capacity of the provincial power generation units.

[0264] The provincial power balance constraint is expressed as follows:

[0265]

[0266] Line safety constraints, expressed as:

[0267]

[0268] In the formula: P represents the power transmitted from the provincial dispatch center to the regional dispatch center recently. p,j,min P is the minimum power flow value for the tie line. p,j,max This represents the maximum power flow value of the connecting line.

[0269] Furthermore, in step S3, if the local dispatch center experiences a discrepancy between the actual load and the day-ahead forecast due to forecasting errors, or if weather conditions cause a deviation between the actual and planned output of the local dispatch center's renewable energy units, and the local dispatch center cannot resolve the issue with its own units, it will seek assistance from the provincial dispatch center. The provincial dispatch center will then summarize the power deviation information and, after referring to the information from various local dispatch centers and considering its own resource situation, will reissue relevant control targets to the local dispatch center. The constraints of the provincial dispatch center at this time are as follows:

[0270] Provincial-level energy storage constraints include energy storage power constraints and energy storage charge rate constraints for provincial-level energy storage power stations.

[0271] The energy storage power constraint expression is as follows:

[0272] 0≤P p,s,ch,t ≤X p,s,ch,t P p,s,ch,max

[0273] 0≤P p,s,dis,t ≤X p,s,dis,t P p,s,dis,max

[0274] 0≤X p,s,ch,t +X p,s,dis,t ≤1

[0275] In the formula, P p,s,ch,max P p,s,dis,max X represents the maximum charging power and maximum discharging power of the energy storage system s in the provincial grid; p,s,ch,t X p,s,dis,t Let X be a 0-1 variable representing the charge / discharge state of the stored energy at time t. p,s,ch,t =1 and X p,s,dis,t When X = 0, the energy storage is in a charging state. p,s,ch,t =0 and X p,s,dis,t When = 1, the energy storage is in a discharging state;

[0276] Energy storage charge rate constraints are used to avoid overcharging and over-discharging of energy storage, and the expression is as follows:

[0277] SOC p,s,min ≤SOC p,s,t ≤SOC p,s,max

[0278]

[0279] Among them, SOC p,s,min SOC p,s,max The minimum and maximum charge rates of energy storage s; SOC p,s,0 η represents the initial charge rate of the energy storage power station s; p,s,ch η p,s,dis E represents the charge / discharge efficiency of energy storage; Δt represents the time interval; Ep,s Let be the energy storage capacity of energy storage power station s;

[0280] Flexible resource constraints, including power absorption constraints and discharge constraints of flexible resources;

[0281] The power absorption constraint expression for flexible resources is as follows:

[0282] 0≤P p,a,ch,t ≤X p,a,ch,t P p,a,ch,max

[0283] Among them, P p,a,ch,max To maximize the absorption capacity of the province's flexible resource a, X p,a,ch,t A 0-1 variable representing the flexible resource consumption status;

[0284] Flexible resources include small hydropower stations, batteries, etc., which can provide a portion of the power for the provincial dispatch center. The discharge constraint expression for flexible resources is as follows:

[0285] 0≤P p,a,dis,t ≤X p,a,dis,t P p,a,dis,max

[0286] Among them, P p,a,dis,max To utilize the province's flexible resources, the maximum discharge power of X p,a,dis,t For flexible resource discharge states, use 0-1 variables;

[0287] 0≤X p,a,ch,t +X p,a,dis,t ≤1

[0288] The provincial power balance constraint is expressed as follows:

[0289]

[0290] In the formula: The actual power transmitted from the provincial power grid to region j;

[0291] Line safety constraints are expressed as follows:

[0292]

[0293] In the formula: P p,j,min P is the minimum power flow value for the tie line. p,j,max This represents the maximum power flow value of the connecting line.

[0294] In one possible implementation, in step S4, the day-ahead dispatch center achieves power balance in its region through power transmission from the provincial dispatch center and the generation of its own generating units; the dispatch center's constraints at this time are as follows:

[0295] The power balance constraint of the ground control system is expressed as follows:

[0296]

[0297] In the formula: Let K be the power generation capacity of the conventional unit k of the ground control station j; K is the number of conventional units of the ground control station j. The generating capacity of the renewable energy unit r of the local dispatch center j; R is the number of renewable energy units of the local dispatch center j; P plan,j,t The load value predicted by the regional survey; This refers to the power that the provincial power dispatcher plans to transmit to the region J day before the deadline;

[0298] The output constraint of traditional generator units in the regional dispatching system is expressed as follows:

[0299]

[0300] In the formula: This is the minimum output of the regional control unit. To the maximum output of the regional control unit;

[0301] The ramp-up constraint for traditional generator units in regional dispatching is expressed as follows:

[0302]

[0303] In the formula: r d,j,k For the downhill climbing ability of the ground control unit, r u,j,k This enhances the hill-climbing capability of the regional dispatching units;

[0304] The constraint on the standby generator unit of the regional dispatch center is expressed as follows:

[0305]

[0306]

[0307] In the formula: Positive standby capacity provided for regional power dispatch units This represents the maximum positive standby capacity of the regional dispatching units. Negative reserve capacity provided for regional power dispatch units. This represents the maximum negative standby capacity of the regional dispatching units.

[0308] Furthermore, in step S4, without changing the power generation plans of the provincial and regional dispatch units, the power redistribution by the provincial dispatch achieves power balance in the regional power grid. Simultaneously, the region may experience excessive renewable energy generation or reduced load, leading to an overabundance of actual power generation that cannot be absorbed. The provincial dispatch assists the regional dispatch in determining the amount of wind and solar power curtailment. The regional dispatch constraints include:

[0309] The regional power balance constraint is expressed as follows:

[0310]

[0311] In the formula: The actual power generation of new energy sources in the local area; P represents the actual power transmitted from the provincial dispatch center to the regional dispatch center within a given day. ac,j,t This represents the actual load value of the local dispatch center j.

[0312] The constraint on wind and solar power curtailment is expressed as follows:

[0313]

[0314] In the formula: P j,ws,t This represents the actual amount of wind and solar power curtailed during the day.

[0315] For details on the implementation effects of the source-grid-load-storage provincial-local coordinated regulation method for renewable energy consumption described in the above embodiments of the present invention, please refer to [link to relevant documentation]. Figure 3 and Figure 4 The survey will Figure 3 The self-power status shown is reported to the provincial dispatch center, which then summarizes the resources of the region to assist and re-optimizes the air dispatch target, such as... Figure 4 As shown, the provincial dispatch center achieves regional power balance through power transmission.

[0316] Example 2

[0317] Please see Figure 5 An embodiment of the present invention provides a source-grid-load-storage provincial-local coordinated control system for renewable energy consumption, comprising:

[0318] The day-ahead power generation plan calculation module is used to calculate the power generation plan of each unit and the planned value of power transmission between provinces and regions based on the pre-established day-ahead power generation plan model, the load reported by each region, wind power and photovoltaic power generation, and reserve capacity.

[0319] The intraday provincial-local power transmission optimization module is used to calculate the regional power grid deviation power based on the actual wind and photovoltaic power generation of the regional power grid according to the pre-established intraday provincial-local power transmission optimization model, correct the planned value of the day-ahead power transmission between provinces and regions, and realize the power balance of the regional power grid by utilizing the energy storage and diverse flexible resources of the provincial and regional dispatch centers.

[0320] The provincial dispatch allocation module is used to treat the provincial dispatch center as the upper-level decision-maker and, based on pre-established provincial dispatch constraints, coordinate with the local dispatch center to suppress grid fluctuations when power deviations occur.

[0321] The regional dispatch absorption module is used to make the regional dispatch center the lower-level decision-maker. Based on the pre-established regional dispatch center constraints, it completes the planned output of the regional dispatch center. If the actual output of the regional dispatch center is greater than the planned output, the excess power is transmitted to the provincial dispatch center for scheduling. If the actual output is less than the planned output, the power deficit is supplemented through the scheduling of the provincial dispatch center.

[0322] In one possible implementation, the day-ahead power generation planning calculation module is designed with the objective function of minimizing the total day-ahead cost of provincial and regional dispatch centers, and the calculation expression is as follows:

[0323] minC be =C p,be +C a,be

[0324] In the formula: C p,be For provincial adjustment of day-ahead costs; C a,be For the day-ahead cost of the local survey;

[0325] The provincial dispatch day-ahead cost includes the power generation cost and standby cost of the provincial dispatch units, and the calculation formula is as follows:

[0326] C p,be =C p,G +C p.R

[0327] In the formula: C p,G C p.R The generation cost and standby cost of the provincial dispatch unit are respectively calculated using the following expressions:

[0328]

[0329]

[0330] In the formula, a i b i c i The power generation cost coefficient of provincial dispatch unit i; These are the positive and negative rotating reserve values ​​of provincial dispatch unit i at time t, respectively. These are the positive and negative standby cost coefficients for unit i, respectively;

[0331] The day-ahead cost of the regional dispatch center includes the cost of conventional dispatch units and standby costs, and the calculation formula is as follows:

[0332]

[0333] Among them, C j,G C j.R Let $\beginning$ be the power generation cost and standby cost of the local dispatch unit j, respectively. The calculation expressions are as follows:

[0334]

[0335]

[0336] In the formula, a j,k b j,k c j,k The power generation cost coefficient of the traditional unit k of the ground control j; The positive and negative rotational reserve values ​​of the traditional unit k of the ground control j at time t; These are the positive and negative standby cost coefficients for the traditional unit k of the regional dispatch j, respectively.

[0337] In one possible implementation, the intraday power transmission optimization module is designed with the objective function of minimizing the total intraday cost of provincial and regional dispatching, and the calculation expression is as follows:

[0338] minC in =C p,in +C a,in

[0339] In the formula: C p,in To adjust the total cost within the day; C a,in This represents the total cost of the local survey within a day.

[0340] The total daily cost of provincial dispatch includes energy storage costs and flexible resource costs, calculated as follows:

[0341] C p,in =C p,S +C p,res

[0342] In the formula: C p,S To save on energy storage costs; C p,res To adjust the costs of diversified and flexible resources in the province;

[0343]

[0344]

[0345] In the formula: q p,s,ch,t q p,s,dis,t To reduce the charging and discharging costs of energy storage power stations; q p,a,ch,t q p,a,dis,t To reduce the cost of consuming and discharging flexible resources;

[0346] The total daily cost of geodetic survey is the cost of wind and solar curtailment, calculated as follows:

[0347]

[0348] In the formula: C j,ws,t The cost of wind and solar power curtailment is calculated using the following expression:

[0349] C j,ws,t =ρ j,ws,t P j,ws,t

[0350] In the formula: ρ j,ws,t To account for the cost of wind and solar power curtailment, P j,ws,t To predict the amount of wind and solar power curtailed.

[0351] In one possible implementation, the provincial allocation module pre-establishes the following provincial allocation constraints:

[0352] The output constraint of the provincial dispatching unit is expressed as follows:

[0353] P p,i,min ≤P p,i,t ≤P p,i,max

[0354] In the formula: P p,i,min To achieve the minimum output of the provincial-level generating units, P p,i,t To contribute to the provincial power generation unit plan, P p,i,max To maximize the output of the provincial power generation units;

[0355] The provincial dispatch unit ramp-up constraint is expressed as follows:

[0356] r d,i ≤P p,i,t+1 -P p,i,t ≤r u,i

[0357] In the formula: r d,i To improve the downhill climbing ability of the provincial-level generating units, r u,i To enhance the uphill climbing ability of the provincial power generation units;

[0358] The standby unit constraint is expressed as follows:

[0359]

[0360]

[0361] In the formula: The reserve capacity of the provincial power generation units is as planned. This represents the maximum standby capacity of the provincial power generation units. The reserve plan value for provincial-level generating units. This represents the maximum negative reserve capacity of the provincial power generation units.

[0362] The provincial power balance constraint is expressed as follows:

[0363]

[0364] Line safety constraints, expressed as:

[0365]

[0366] In the formula: P represents the power transmitted from the provincial dispatch center to the regional dispatch center recently. p,j,min P is the minimum power flow value for the tie line. p,j,max This represents the maximum power flow value of the connecting line;

[0367] Provincial-level energy storage constraints include energy storage power constraints and energy storage charge rate constraints for provincial-level energy storage power stations.

[0368] The energy storage power constraint expression is as follows:

[0369] 0≤P p,s,ch,t ≤X p,s,ch,t P p,s,ch,max

[0370] 0≤P p,s,dis,t ≤X p,s,dis,t P p,s,dis,max

[0371] 0≤X p,s,ch,t +X p,s,dis,t ≤1

[0372] In the formula, P p,s,ch,max P p,s,dis,max X represents the maximum charging power and maximum discharging power of the energy storage system s in the provincial grid; p,s,ch,t X p,s,dis,t Let X be a 0-1 variable representing the charge / discharge state of the stored energy at time t. p,s,ch,t =1 and X p,s,dis,t When X = 0, the energy storage is in a charging state. p,s,ch,t =0 and X p,s,dis,t When = 1, the energy storage is in a discharging state;

[0373] Energy storage charge rate constraints are used to avoid overcharging and over-discharging of energy storage, and the expression is as follows:

[0374] SOC p,s,min ≤SOC p,s,t ≤SOC p,s,max

[0375]

[0376] Among them, SOC p,s,min SOC p,s,max The minimum and maximum charge rates of energy storage s; SOC p,s,0 η represents the initial charge rate of the energy storage power station s; p,s,ch η p,s,dis E represents the charge / discharge efficiency of energy storage; Δt represents the time interval; E p,s Let be the energy storage capacity of energy storage power station s;

[0377] Flexible resource constraints, including power absorption constraints and discharge constraints of flexible resources;

[0378] The power absorption constraint expression for flexible resources is as follows:

[0379] 0≤P p,a,ch,t ≤X p,a,ch,t P p,a,ch,max

[0380] Among them, P p,a,ch,max To maximize the absorption capacity of the province's flexible resource a, X p,a,ch,t A 0-1 variable representing the flexible resource consumption status;

[0381] The discharge constraint expression for flexible resources is as follows:

[0382] 0≤P p,a,dis,t ≤X p,a,dis,t P p,a,dis,max

[0383] Among them, P p,a,dis,max To utilize the province's flexible resources, the maximum discharge power of X p,a,dis,t For flexible resource discharge states, use 0-1 variables;

[0384] 0≤X p,a,ch,t +X p,a,dis,t ≤1

[0385] The provincial power balance constraint is expressed as follows:

[0386]

[0387] In the formula: The actual power transmitted from the provincial power grid to region j;

[0388] Line safety constraints are expressed as follows:

[0389]

[0390] In the formula: P p,j,min For minimum power flow in the connecting line, P p,j,max The largest current flows through the connecting line.

[0391] In one possible implementation, the pre-established geological survey constraints by the geological survey absorption module include:

[0392] The power balance constraint of the ground control system is expressed as follows:

[0393]

[0394] In the formula: Let K be the power generation capacity of the conventional unit k of the ground control station j; K is the number of conventional units of the ground control station j. The generating capacity of the renewable energy unit r of the local dispatch center j; R is the number of renewable energy units of the local dispatch center j; P plan,j,t The load value predicted by the regional survey; This refers to the power that the provincial power dispatcher plans to transmit to the region J day before the deadline;

[0395] The output constraint of traditional generator units in the regional dispatching system is expressed as follows:

[0396]

[0397] In the formula: This is the minimum output of the regional control unit. To the maximum output of the regional control unit;

[0398] The ramp-up constraint for traditional generator units in regional dispatching is expressed as follows:

[0399]

[0400] In the formula: r d,j,k For the downhill climbing ability of the ground control unit, r u,j,k This enhances the hill-climbing capability of the regional dispatching units;

[0401] The constraint on the standby generator unit of the regional dispatch center is expressed as follows:

[0402]

[0403]

[0404] In the formula: Positive standby capacity provided for regional power dispatch units This represents the maximum positive standby capacity of the regional dispatching units. Negative reserve capacity provided for regional power dispatch units. This represents the maximum negative reserve capacity of the regional dispatching units;

[0405] The regional power balance constraint is expressed as follows:

[0406]

[0407] In the formula: The actual power generation of new energy sources in the local area; P represents the actual power transmitted from the provincial dispatch center to the regional dispatch center within a given day. ac,j,t This represents the actual load value of the local dispatch center j.

[0408] The constraint on wind and solar power curtailment is expressed as follows:

[0409]

[0410] In the formula: P j,ws,t This represents the actual amount of wind and solar power curtailed during the day.

[0411] Example 3

[0412] An electronic device, comprising:

[0413] Memory, storing at least one instruction; and

[0414] The processor executes the instructions stored in the memory to implement the source-grid-load-storage provincial-local coordinated regulation method for new energy consumption.

[0415] Example 4

[0416] A computer-readable storage medium storing a computer program, which, when executed by a processor, implements the source-grid-load-storage province-local coordinated regulation method for new energy consumption.

[0417] The computer program includes computer program code, which can be in the form of source code, object code, executable file, or some intermediate form. The computer-readable storage medium can include any entity or device capable of carrying the computer program code, a medium, a USB flash drive, a portable hard drive, a magnetic disk, an optical disk, a computer memory, a read-only memory, a random access memory, an electrical carrier signal, a telecommunication signal, and a software distribution medium, etc. It should be noted that the content included in the computer-readable medium can be appropriately added or removed according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, the computer-readable medium does not include electrical carrier signals and telecommunication signals. For ease of explanation, the above content only shows the parts related to the embodiments of the present invention; for specific technical details not disclosed, please refer to the method section of the embodiments of the present invention. This computer-readable storage medium is non-transitory and can be stored in storage devices formed by various electronic devices, enabling the execution process described in the method of the embodiments of the present invention.

[0418] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0419] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It should be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1A device that provides the functions specified in one or more boxes.

[0420] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0421] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0422] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A method for coordinated regulation of energy sources, grid, load, and storage across provinces and regions for renewable energy consumption, characterized in that, include: Based on the pre-established day-ahead power generation plan model, the power generation plan of each unit and the planned value of power transmission between provinces and regions are calculated by using the load reported by each region, wind power and photovoltaic power generation, and reserve capacity. Based on the pre-established intraday provincial-local power transmission optimization model, the deviation power of the regional power grid is calculated by the actual wind power and photovoltaic power generation of the regional power grid, and the planned value of intraday power transmission between provinces and regions is corrected. By utilizing the energy storage and diverse flexible resources of the provincial and regional dispatch centers, the power balance of the regional power grid is achieved. The provincial dispatch center acts as the upper-level decision-maker. Based on pre-established provincial dispatch constraints, it coordinates with the local dispatch center to suppress grid fluctuations when power deviations occur. The provincial dispatch center formulates power generation plans and power outputs for provincial and local dispatch units based on load forecasts reported by various regions and wind and solar power generation forecasts. If the local dispatch center experiences a discrepancy between actual load and day-ahead forecasts due to forecast deviations or weather conditions, causing deviations between the actual output and planned output of local dispatch renewable energy units, the local dispatch center will seek assistance from the provincial dispatch center when it cannot resolve the issue with its own units. The power deviation information is then collected and sent to the provincial dispatch center. After referring to the information from various dispatch centers and considering its own resource situation, the provincial dispatch center reissues relevant control targets to the local dispatch center. The regional power dispatch center acts as the lower-level decision-maker. Based on pre-established regional power dispatch constraints, it completes its planned power output. If the actual output exceeds the planned output, the excess power is transmitted to the provincial power dispatch center for scheduling. If the actual output is less than the planned output, the power deficit is supplemented through the provincial power dispatch center's scheduling. During the daytime, the regional power dispatch center achieves regional power balance through power transmission from the provincial power dispatch center and its own unit generation. The regional power dispatch center's constraints at this time include power balance constraints, traditional unit output constraints, traditional unit ramp-up constraints, and standby unit constraints. During the daytime, without changing the power generation plans of the provincial and regional power dispatch centers, the provincial power dispatch center redistributes power to achieve regional grid power balance. In cases where there is excessive renewable energy generation or reduced load in a region, resulting in excessive actual power generation that cannot be absorbed, the provincial power dispatch center assists the regional power dispatch center in determining the amount of wind and solar power curtailment. The regional power dispatch center's constraints at this time include regional power balance constraints and wind and solar power curtailment constraints.

2. The source-grid-load-storage provincial-local coordinated regulation method for new energy consumption according to claim 1, characterized in that, The process of establishing the day-ahead power generation planning model is as follows: The objective function is designed to minimize the total day-ahead cost of provincial and regional surveys, and the expression is as follows: In the formula: To adjust the day-ahead costs for the province; For the day-ahead cost of the local survey; The provincial dispatch day-ahead cost includes the power generation cost and standby cost of the provincial dispatch units, and the calculation formula is as follows: In the formula: , The generation cost and standby cost of the provincial dispatch unit are respectively calculated using the following expressions: In the formula, , , For provincial dispatch units The power generation cost coefficient; , They are provincial dispatch units exist Positive and negative rotational spare values ​​at any given time; , The units Positive and negative standby cost coefficients; The day-ahead cost of the regional dispatch center includes the cost of conventional dispatch units and standby costs, and the calculation formula is as follows: in, , They are respectively the local survey The calculation formulas for the unit's power generation cost and standby cost are as follows: In the formula, , , For the survey Traditional units The power generation cost coefficient; , For the survey Traditional units At any moment Positive and negative rotational spare values; , They are respectively the local survey Traditional units Positive and negative reserve cost coefficients.

3. The source-grid-load-storage provincial-local coordinated regulation method for new energy consumption as described in claim 1, characterized in that, The process of establishing the intraday provincial power transmission optimization model is as follows: The objective function for minimizing the total daily cost of provincial and regional surveys is calculated as follows: In the formula: To adjust the total cost within the day; This represents the total cost of the local survey within a day. The total daily cost of provincial dispatch includes energy storage costs and flexible resource costs, calculated as follows: In the formula: To reduce energy storage costs; To adjust the costs of diversified and flexible resources in the province; In the formula: , To reduce the charging and discharging costs of energy storage power stations; , To reduce the cost of consuming and discharging flexible resources; The total daily cost of geodetic survey is the cost of wind and solar curtailment, calculated as follows: In the formula: The cost of wind and solar power curtailment is calculated using the following expression: In the formula: To account for the cost of wind and solar power curtailment To predict the amount of wind and solar power curtailed.

4. The source-grid-load-storage provincial-local coordinated regulation method for new energy consumption according to claim 1, characterized in that, The steps described above involve the provincial dispatch center acting as the upper-level decision-maker, and, based on pre-established provincial dispatch center constraints, coordinating with the local dispatch center to suppress grid fluctuations when power deviations occur. The current-day provincial dispatch center constraints are as follows: The output constraint of the provincial dispatching unit is expressed as follows: In the formula: To achieve the minimum output of the provincial-level generating units, Contribute to the provincial power generation unit plan. To maximize the output of the provincial power generation units; The provincial dispatch unit ramp-up constraint is expressed as follows: In the formula: To improve the downhill climbing ability of the provincial-level generating units. To enhance the uphill climbing ability of the provincial power generation units; The standby unit constraint is expressed as follows: In the formula: The reserve capacity of the provincial power generation units is as planned. This represents the maximum standby capacity of the provincial power generation units. The reserve plan value for provincial-level generating units. This represents the maximum negative reserve capacity of the provincial power generation units. The provincial power balance constraint is expressed as follows: Line safety constraints, expressed as: In the formula: This refers to the power transmitted from the provincial dispatch center to the regional dispatch center recently. This is the minimum power flow value for the tie line. This represents the maximum power flow value of the connecting line.

5. The source-grid-load-storage provincial-local coordinated regulation method for new energy consumption according to claim 4, characterized in that, The steps described above involve using the provincial dispatch center as the upper-level decision-maker, and coordinating with the local dispatch center to suppress grid fluctuations in the event of power deviations, based on pre-established provincial dispatch center constraints. The intraday provincial dispatch center constraints are as follows: Provincial-level energy storage constraints include energy storage power constraints and energy storage charge rate constraints for provincial-level energy storage power stations. The energy storage power constraint expression is as follows: In the formula, , Energy storage for provincial dispatch The maximum charging power and maximum discharging power of the energy storage; , for The 0-1 variables representing the constant charging and discharging states of the stored energy. and The energy storage is in a charging state at that time. and The energy storage is in a discharging state at that time; Energy storage charge rate constraints are used to avoid overcharging and over-discharging of energy storage, and the expression is as follows: in, , For energy storage The minimum and maximum charge rates; For energy storage power stations The initial charge rate; , The charging and discharging efficiency of energy storage; For time intervals; For energy storage power stations Energy storage capacity; Flexible resource constraints, including power absorption constraints and discharge constraints of flexible resources; The power absorption constraint expression for flexible resources is as follows: in, For flexible resources of the province Maximum absorption capacity, A 0-1 variable representing the flexible resource consumption status; The discharge constraint expression for flexible resources is as follows: in, For flexible resources of the province Maximum discharge power, For flexible resource discharge states, use 0-1 variables; The provincial power balance constraint is expressed as follows: In the formula: To transfer actual data from the province to the region Transmitted power; Line safety constraints are expressed as follows: In the formula: This is the minimum power flow value for the tie line. This represents the maximum power flow value of the connecting line.

6. The source-grid-load-storage provincial-local coordinated regulation method for new energy consumption according to claim 1, characterized in that, The step of using the regional dispatch center as a lower-level decision-maker, completing the planned output of the regional dispatch center according to pre-established regional dispatch center constraints, and transferring the excess power to the provincial dispatch center for scheduling if the actual output of the regional dispatch center is greater than the planned output, and supplementing the power deficit through scheduling by the provincial dispatch center if the actual output is less than the planned output, is defined by the following regional dispatch center constraints: The power balance constraint of the ground control system is expressed as follows: In the formula: For the survey Traditional units The power generation capacity; For the survey The number of traditional generating units; Geographic Survey New energy units The power generation capacity; For the survey The number of new energy generating units; The load value predicted by the regional survey; The provincial survey was sent to the region a few days ago. Planned power transmission; The output constraint of traditional generator units in the regional dispatching system is expressed as follows: In the formula: This is the minimum output of the regional control unit. To the maximum output of the regional control unit; The ramp-up constraint for traditional generator units in regional dispatching is expressed as follows: In the formula: To improve the downhill and uphill climbing capabilities of the regional dispatching units. This enhances the hill-climbing capability of the regional dispatching units; The constraint on the standby generator unit of the regional dispatch center is expressed as follows: In the formula: Positive standby capacity provided for regional power dispatch units This represents the maximum positive standby capacity of the regional dispatching units. Negative reserve capacity provided for regional power dispatch units. This represents the maximum negative standby capacity of the regional dispatching units.

7. The source-grid-load-storage provincial-local coordinated regulation method for new energy consumption according to claim 6, characterized in that, The step of using the regional dispatch center as a lower-level decision-maker, completing the planned output of the regional dispatch center according to pre-established regional dispatch center constraints, and transferring the excess power to the provincial dispatch center for scheduling if the actual output of the regional dispatch center is greater than the planned output, and supplementing the power deficit through scheduling by the provincial dispatch center if the actual output is less than the planned output, includes the following intraday regional dispatch center constraints: The regional power balance constraint is expressed as follows: In the formula: For the survey Actual power generation from new energy sources; This represents the actual power transmitted from the provincial dispatch center to the regional dispatch center within a given day. For the survey The actual load value; The constraint on wind and solar power curtailment is expressed as follows: In the formula: This represents the actual amount of wind and solar power curtailed during the day.

8. A source-grid-load-storage provincial-local coordinated control system for renewable energy consumption, characterized in that, include: The day-ahead power generation plan calculation module is used to calculate the power generation plan of each unit and the planned value of power transmission between provinces and regions based on the pre-established day-ahead power generation plan model, the load reported by each region, wind power and photovoltaic power generation, and reserve capacity. The intraday provincial-local power transmission optimization module is used to calculate the regional power grid deviation power based on the actual wind and photovoltaic power generation of the regional power grid according to the pre-established intraday provincial-local power transmission optimization model, correct the planned value of the day-ahead power transmission between provinces and regions, and realize the power balance of the regional power grid by utilizing the energy storage and diverse flexible resources of the provincial and regional dispatch centers. The provincial dispatch allocation module is used to act as the upper-level decision-maker, and based on pre-established provincial dispatch constraints, to coordinate with the local dispatch to suppress grid fluctuations when power deviations occur. The provincial dispatch formulates power generation plans and power outputs for provincial and local dispatch units based on load forecasts reported by various regions and wind and solar power generation forecasts. If the local dispatch experiences a discrepancy between actual load and day-ahead forecasts due to forecast deviations, or if weather conditions cause deviations between the actual and planned outputs of local dispatch renewable energy units, the local dispatch may seek assistance from the provincial dispatch if it cannot resolve the issue with its own units. The power deviation information is then aggregated and sent to the provincial dispatch. The provincial dispatch, after referring to information from various dispatch centers and considering its own resource situation, reissues relevant control targets to the local dispatch. The regional power grid consumption module is used to make the regional power grid the lower-level decision-maker. Based on pre-established regional power grid constraints, it completes the planned output of the regional power grid. If the actual output of the regional power grid is greater than the planned output, the excess power is transmitted to the provincial power grid for dispatch. If the actual output is less than the planned output, the power deficit is supplemented by the provincial power grid. During the daytime, the regional power grid achieves power balance in its region through power transmission from the provincial power grid and the generation of its own units. At this time, the regional power grid constraints include regional power balance constraints, output constraints of traditional units, ramp-up constraints of traditional units, and constraints of standby units. During the daytime, without changing the power generation plans of the provincial and regional power grid units, the regional power grid achieves power balance after the provincial power grid redistributes power. In cases where there is excessive renewable energy generation or reduced load in the region, resulting in excessive actual power generation that cannot be absorbed, the provincial power grid assists the regional power grid in determining the amount of wind and solar power curtailment. At this time, the regional power grid constraints include regional power balance constraints and wind and solar power curtailment constraints.

9. The source-grid-load-storage provincial-local coordinated control system for new energy consumption as described in claim 8, characterized in that, The day-ahead power generation plan calculation module is designed with the objective function of minimizing the total day-ahead cost of provincial and regional dispatch centers. The calculation expression is as follows: In the formula: To adjust the day-ahead costs for the province; For the day-ahead cost of the local survey; The provincial dispatch day-ahead cost includes the power generation cost and standby cost of the provincial dispatch units, and the calculation formula is as follows: In the formula: , The generation cost and standby cost of the provincial dispatch unit are respectively calculated using the following expressions: In the formula, , , For provincial dispatch units The power generation cost coefficient; , They are provincial dispatch units exist Positive and negative rotational spare values ​​at any given time; , The units Positive and negative standby cost coefficients; The day-ahead cost of the regional dispatch center includes the cost of conventional dispatch units and standby costs, and the calculation formula is as follows: in, , They are respectively the local survey The calculation formulas for the unit's power generation cost and standby cost are as follows: In the formula, , , For the survey Traditional units The power generation cost coefficient; , For the survey Traditional units At any moment Positive and negative rotational spare values; , They are respectively the local survey Traditional units Positive and negative reserve cost coefficients.

10. The source-grid-load-storage provincial-local coordinated control system for new energy consumption according to claim 8, characterized in that, The intraday power transmission optimization module for provincial and regional dispatch centers is designed with the objective function of minimizing the total intraday cost of provincial and regional dispatch centers. The calculation expression is as follows: In the formula: To adjust the total cost within the day; This represents the total cost of the local survey within a day. The total daily cost of provincial dispatch includes energy storage costs and flexible resource costs, calculated as follows: In the formula: To reduce energy storage costs; To adjust the costs of diversified and flexible resources in the province; In the formula: , To reduce the charging and discharging costs of energy storage power stations; , To reduce the cost of consuming and discharging flexible resources; The total daily cost of geodetic survey is the cost of wind and solar curtailment, calculated as follows: In the formula: The cost of wind and solar power curtailment is calculated using the following expression: In the formula: To account for the cost of wind and solar power curtailment To predict the amount of wind and solar power curtailed.

11. The source-grid-load-storage provincial-local coordinated control system for new energy consumption as described in claim 8, characterized in that, The provincial allocation module pre-establishes the following provincial allocation constraints: The output constraint of the provincial dispatching unit is expressed as follows: In the formula: To achieve the minimum output of the provincial-level generating units, Contribute to the provincial power generation unit plan. To maximize the output of the provincial power generation units; The provincial dispatch unit ramp-up constraint is expressed as follows: In the formula: To improve the downhill climbing ability of the provincial-level generating units. To enhance the uphill climbing ability of the provincial power generation units; The standby unit constraint is expressed as follows: In the formula: The reserve capacity of the provincial power generation units is as planned. This represents the maximum standby capacity of the provincial power generation units. The reserve plan value for provincial-level generating units. This represents the maximum negative reserve capacity of the provincial power generation units. The provincial power balance constraint is expressed as follows: Line safety constraints, expressed as: In the formula: This refers to the power transmitted from the provincial dispatch center to the regional dispatch center recently. This is the minimum power flow value for the tie line. This represents the maximum power flow value of the connecting line; Provincial-level energy storage constraints include energy storage power constraints and energy storage charge rate constraints for provincial-level energy storage power stations. The energy storage power constraint expression is as follows: In the formula, , Energy storage for provincial dispatch The maximum charging power and maximum discharging power of the energy storage; , for The 0-1 variables representing the constant charging and discharging states of the stored energy. and The energy storage is in a charging state at that time. and The energy storage is in a discharging state at that time; Energy storage charge rate constraints are used to avoid overcharging and over-discharging of energy storage, and the expression is as follows: in, , For energy storage The minimum and maximum charge rates; For energy storage power stations The initial charge rate; , The charging and discharging efficiency of energy storage; For time intervals; For energy storage power stations Energy storage capacity; Flexible resource constraints, including power absorption constraints and discharge constraints of flexible resources; The power absorption constraint expression for flexible resources is as follows: in, For flexible resources of the province Maximum absorption capacity, A 0-1 variable representing the flexible resource consumption status; The discharge constraint expression for flexible resources is as follows: in, For flexible resources of the province Maximum discharge power, For flexible resource discharge states, use 0-1 variables; The provincial power balance constraint is expressed as follows: In the formula: To transfer actual data from the province to the region Transmitted power; Line safety constraints are expressed as follows: In the formula: For the minimum power flow of the connecting line, The largest current flows through the connecting line.

12. The source-grid-load-storage provincial-local coordinated control system for new energy consumption as described in claim 8, characterized in that, The pre-established geological survey constraints in the geological survey absorption module include: The power balance constraint of the ground control system is expressed as follows: In the formula: For the survey Traditional units The power generation capacity; For the survey The number of traditional generating units; Geographic Survey New energy units The power generation capacity; For the survey The number of new energy generating units; The load value predicted by the regional survey; The provincial survey was conducted in the region. Planned power transmission; The output constraint of traditional generator units in the regional dispatching system is expressed as follows: In the formula: This is the minimum output of the regional control unit. To the maximum output of the regional control unit; The ramp-up constraint for traditional generator units in regional dispatching is expressed as follows: In the formula: To improve the downhill and uphill climbing capabilities of the regional dispatching units. This enhances the hill-climbing capability of the regional dispatching units; The constraint on the standby generator unit of the regional dispatch center is expressed as follows: In the formula: Positive standby capacity provided for regional power dispatch units This represents the maximum positive standby capacity of the regional dispatching units. Negative reserve capacity provided for regional power dispatch units. This represents the maximum negative reserve capacity of the regional dispatching units; The regional power balance constraint is expressed as follows: In the formula: For the survey Actual power generation from new energy sources; This represents the actual power transmitted from the provincial dispatch center to the regional dispatch center within a given day. For the survey The actual load value; The constraint on wind and solar power curtailment is expressed as follows: In the formula: This represents the actual amount of wind and solar power curtailed during the day.

13. An electronic device, characterized in that, include: Memory, storing at least one instruction; and The processor executes the instructions stored in the memory to implement the source-grid-load-storage provincial-local coordinated regulation method for new energy consumption as described in any one of claims 1 to 7.

14. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the source-grid-load-storage provincial and local coordinated regulation method for new energy consumption as described in any one of claims 1 to 7.

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