A new energy power system safety scheduling method and device considering power flow

Abstract

The application discloses a kind of new energy power system safety scheduling methods considering electric power flow, it is related to new energy technical field, the application is by aiming at high proportion new energy's electric power system, considering coal consumption cost of thermal power unit and new energy power generation wind and light abandonment cost, to obtain new energy power station original scheduling plan to electric power system is dispatched;According to the weight of each new energy power station in the fair scheduling of electric power system, the original scheduling plan of new energy power station is redistributed, and the fair scheduling plan of new energy power station is obtained;According to the fair scheduling plan of new energy power station, the safety scheduling plan of new energy station is finally determined by comprehensively considering new energy unit constraint and power grid safety and stability operation constraint.The application discloses a kind of new energy power system safety scheduling device considering electric power flow, the application can further improve new energy power generation utilization rate and guarantee power grid safety and stability operation, and has important value for improving new energy consumption.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of new energy technology, in particular to a new energy power system safety scheduling method and device considering power flow. BACKGROUND

[0002] With the transformation of global energy structure, the proportion of new energy such as wind power and solar energy is increasing year by year, and the power system is undergoing profound changes. The traditional fossil fuel-based power system scheduling method has been difficult to adapt to the challenges brought by large-scale access of new energy. New energy generation has intermittency and volatility, which makes it difficult to predict and control power flow, and brings great pressure to the safe and stable operation of the power system. At present, the research on new energy power system scheduling is mostly from the single economic point of view, lacking consideration of the safe operation of the power system and the fair scheduling of new energy. In view of this, in the face of high proportion of new energy power system scheduling problem, how to consider the scheduling from the aspects of safety, fairness, economy and other aspects comprehensively to improve the efficient and safe operation of the power system is the current problem to be solved. SUMMARY

[0003] The technical problem to be solved by the present application is to overcome the shortcomings of the prior art and provide a new energy power system safety scheduling method and device considering power flow. The present application can not only guarantee the safe and stable operation of the power system, but also realize the safe and economic scheduling of the new energy power system, further improve the utilization rate of new energy, and has important significance for promoting the transformation of energy structure and promoting the sustainable development of the power industry.

[0004] The present application adopts the following technical solutions to solve the above technical problems:

[0005] In a first aspect, the present application provides a new energy power system safety scheduling method considering power flow, comprising:

[0006] For a power system with a high proportion of new energy, the coal consumption cost of thermal power units and the cost of abandoned wind and light of new energy power generation are considered, and the power system is scheduled to obtain an original scheduling plan of new energy power stations;

[0007] According to the weight of each new energy power station in the fair scheduling of the power system, the original scheduling plan of the new energy power station is redistributed to obtain a fair scheduling plan of the new energy power station;

[0008] According to the fair scheduling plan of the new energy power station, the constraints of new energy units and the safe and stable operation constraints of the power grid are considered comprehensively, and the safety scheduling plan of the new energy station is finally determined.

[0009] As a further optimization scheme of the new energy power system safety dispatching method considering power flow described in this invention, the goal of the original dispatching plan of the new energy power plant is to minimize the sum of the power generation costs of the power system. The power generation costs of the power system include the coal consumption cost of thermal power units, the cost of photovoltaic curtailment, and the cost of wind power curtailment.

[0010] The formula for calculating the coal consumption cost of thermal power units is as follows:

[0011]

[0012] Among them, C TH,t The coal consumption cost of thermal power units; N TH The number of thermal power units participating in dispatch within the regional power grid; For a given kth TH The output coal consumption cost coefficient of each thermal power unit; Let t be the output of the thermal power unit;

[0013] The formula for calculating the cost of solar curtailment is as follows:

[0014]

[0015] Among them, C PV,t Cost of solar curtailment; N PV λ represents the number of photovoltaic power plants participating in dispatch within the regional power grid. PV This is the unit curtailment cost of photovoltaic power, λ PV It includes two parts: one part is the additional environmental cost brought about by coal-fired power generation replacing photovoltaic power generation, and the other part is the loss of abandoned photovoltaic power generation; α PV The maximum prediction error coefficient for photovoltaic power output is greater than or equal to 1. For the kth PV The predicted output value of a photovoltaic system at time t. For the kth PV The photovoltaic scheduling plan value at time t;

[0016] The formula for calculating the cost of wind curtailment is as follows:

[0017]

[0018] Among them, C WT,t For wind curtailment costs; N WT λ represents the number of wind power stations participating in dispatch within the regional power grid. WT It is the unit cost of wind curtailment, λ WT It includes two parts: one part is the additional environmental cost of replacing wind power with coal-fired power, and the other part is the loss of abandoned wind power; α WT It is the maximum prediction error coefficient for wind power output, and its value is greater than or equal to 1; For the kth WT The predicted power output of a wind farm at time t. For the kth WT The scheduling plan value for a wind farm at time t.

[0019] As a further optimization scheme of the safe dispatching method for new energy power systems that considers power flow as described in this invention, the objective function C of the original dispatching plan for new energy power plants is... total The specific formula is as follows:

[0020]

[0021] Where T is the scheduling time period.

[0022] As a further optimization of the new energy power system security dispatch method considering power flow described in this invention, the original dispatch plan of the new energy power plants is redistributed according to the weight of each new energy power plant in the fair dispatch of the power system, resulting in a fair dispatch plan for the new energy power plants. The specific fair dispatch plan for the new energy power plants is as follows:

[0023] First, based on the original dispatch plan for new energy power plants and the weight of each new energy power plant in the fair dispatch of the power system, the dispatch plan for the power plants is initially allocated:

[0024]

[0025] in, The initial fair allocation plan for the power plants is calculated according to their weights; For the kth PV The photovoltaic or the kth WT The weight of each wind farm This is the predicted power output of the power plant at time t. It is the kth PV The photovoltaic or the kth WT Preliminary scheduling plan for each wind farm, k PV / WT It is the kth PV The photovoltaic or the kth WT N wind farms PV / WT It refers to the number of photovoltaic or wind farms;

[0026] Secondly, the initial allocation plan for the power plant The predicted output value of the same power station at time t In comparison, the power plants that will participate in the scheduling at time t are further divided into two categories:

[0027] The first category is At this point, the power plant will finally execute the dispatch plan. Simultaneously calculate the grid's remaining absorption capacity plan for the power plant at time t. The specific calculation is:

[0028]

[0029] The second type is At this time, the power station will serve as an intermediate dispatching plan, and the remaining power generation space of the power station at time t is calculated The specific calculation formula is:

[0030]

[0031] According to the number of the second type of power station, the remaining consumption plan is redistributed according to the weight, and the dispatching plan adjustment quota of the power station under the second type of situation is obtained

[0032]

[0033] Where, N PV / WT-1 is the number of the first type of power station after initial allocation, N PV / WT-2 is the number of the second type of power station after initial allocation;

[0034] The final fair dispatching plan of the second type of power station is calculated The specific calculation formula is:

[0035]

[0036] As a further optimization scheme of the new energy power system safety dispatching method considering power flow according to the present application, the constraint conditions of new energy unit constraints and power grid safety and stability operation constraints include:

[0037] AC power flow equation constraint:

[0038]

[0039] Where, P TH,i,t , P PV,i,t , P WT,i,t and P LD,i,t are the active power of the i-th node at the t-th moment; Q TH,i,t , Q PV,i,t , Q WT,i,t and Q LD,i,t are the reactive power of the i-th node at the t-th moment; G ij , B ij and δ ij are the conductance, reactance and phase angle between the i-th node and the j-th node, U i,t is the voltage amplitude of the i-th node at the t-th moment, and U j,tis the voltage amplitude of the j-th node at time t, and n is the total number of nodes in the power system;

[0040] Thermal power unit output constraints:

[0041]

[0042] in, and They are respectively the kth TH The lower and upper limits of the output of each thermal power unit;

[0043] Thermal power unit ramp rate constraint:

[0044]

[0045] in, and They are respectively the kth TH The maximum upward and downward climbing power of each thermal power unit The output of the thermal power unit at time t-1;

[0046] Power output constraints of new energy power plants:

[0047]

[0048] Among them, the actual output of photovoltaic and wind power is not higher than the predicted output;

[0049] Node voltage safety constraints:

[0050] U i,min ≤U i,t ≤U i,max i = 1, 2, ..., N ND

[0051] Among them, U i,min and U i,max These are the lower and upper voltage limits for the i-th node, respectively; U i,t N is the voltage magnitude of the i-th node; ND This represents the number of system nodes.

[0052] N-1 safety constraints on node voltages:

[0053]

[0054] Among them, U i,min and U i,max These are the lower and upper voltage limits for the i-th node, respectively. and These are the voltage magnitudes of the i-th node in its base state and under the o-th (N-1)-th fault event, respectively; N ND N represents the number of nodes in the power system. FTN-1 number of fault for power system;

[0055] N-1 safety constraint of line transmission power

[0056]

[0057] wherein, P L,l,t and P L,l,max are the active power and the maximum transmission power of the lth line, respectively; and are the active power of the lth line under the base state and the oth N-1 fault event, respectively; N L is the number of system branches, U j,t is the voltage amplitude of the jth node.

[0058] In a second aspect, a device for safe scheduling of a new energy power system considering power flow includes:

[0059] a collecting module configured to collect all data in a new energy generation scheduling process, the all data including installation capacity, power generation, and fault outage data of a new energy station, the new energy including photovoltaic and wind power;

[0060] a constraint module configured to store various constraint conditions in the new energy scheduling process considering power system safety, and store upper and lower limit values of the various constraint conditions;

[0061] a calculation module configured to comprehensively consider a proposed fair scheduling plan of the new energy power station according to the all data in the new energy generation scheduling process and the various constraints, and calculate a comprehensive scheduling result of the new energy station and present the comprehensive scheduling result of the new energy station in a visual manner.

[0062] In a third aspect, a computer device includes a memory, a processor, and a computer program stored in the memory and capable of running on the processor, and the processor implements steps of a method for safe scheduling of a new energy power system considering power flow according to the first aspect or any of the corresponding embodiments.

[0063] In a fourth aspect, an embodiment of the present application further provides a computer readable storage medium storing a computer program, and the computer program implements steps of a method for safe scheduling of a new energy power system considering power flow according to the first aspect or any of the corresponding embodiments when executed by a processor.

[0064] Compared with the prior art, the above technical solution has the following technical effects:

[0065] (1) The present application first considers the generation cost of a high proportion of new energy new type power system, then performs fair scheduling redistribution on the scheduling plan on the scheduling model, and finally comprehensively considers the new energy unit constraint and the safe and stable operation constraint of the power grid to determine the final scheduling result of the new energy station, so that the safe and economic scheduling of the new energy station in the new energy power system can be realized, and the scheduling result is more reliable and comprehensive. In addition, the final scheduling result of the present application is presented in a numerical way, the result is more accurate, and the intuitive degree is high.

[0066] (2) The method of the present application aims to realize accurate prediction and regulation of power flow by comprehensively considering the uncertainty of new energy generation, the volatility of power load and the physical constraints of the power grid, to ensure the safe and stable operation of the power system. At the same time, the method also focuses on the optimization of economy, by reasonably arranging the generation output of new energy and traditional energy, to reduce the system operation cost and improve the overall economic benefit. BRIEF DESCRIPTION OF DRAWINGS

[0067] Figure 1 is a step schematic diagram of the new energy scheduling control method in the present application;

[0068] Figure 2 is a ten-machine 39-node simulation model used in the embodiment of the present application;

[0069] Figure 3 is a structure schematic diagram of the new energy scheduling control device in the present application;

[0070] Figure 4 is a structure schematic diagram of the computer equipment involved in the new energy scheduling control in the present application;

[0071] Figure 5 is a comparison of the scheduling plan and power prediction of the PV1 station in the new energy scheduling control embodiment of the present application;

[0072] Figure 6 is a comparison of the scheduling plan and power prediction of the WF1 station in the new energy scheduling control embodiment of the present application. DETAILED DESCRIPTION

[0073] In order to make the purpose, technical scheme and advantages of the present application clearer, the present application will be described in detail below with reference to the drawings and specific embodiments.

[0074] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be implemented in other ways different from the description, and those skilled in the art can make similar generalizations without departing from the connotation of the present application, therefore the present application is not limited by the specific embodiments disclosed below.

[0075] Second, the "one embodiment" or "an embodiment" referred to herein means a specific feature, structure, characteristic, or combination of features and / or characteristics described herein that can be included in at least one implementation of the present application. The various appearances of "in one embodiment" or "an embodiment" in the specification are not necessarily all referring to the same embodiment.

[0076] Referring to Figures 1-6 For the embodiment of the application, the embodiment provides a new energy power system safety scheduling method considering power flow, comprising,

[0077] S101: For a high proportion of new energy power system, considering the coal consumption cost of thermal power unit and the wind and light abandoned cost of new energy power generation, the power system is scheduled to obtain the original scheduling plan of new energy power station, and the target of the original scheduling plan of new energy power station is to minimize the sum of generation cost of the power system:

[0078] The generation cost of the power system includes the coal consumption cost of the thermal power unit, the light abandoned cost of photovoltaic and the wind abandoned cost of wind power;

[0079] The calculation formula of the coal consumption cost of the thermal power unit is as follows:

[0080]

[0081] Wherein, C TH,t is the coal consumption cost of the thermal power unit; N TH is the number of thermal power units participating in scheduling in the regional power grid; is the output coal consumption cost coefficient of the given k TH th thermal power unit; is the output size of the thermal power unit at t time.

[0082] The calculation formula of the light abandoned cost of photovoltaic is as follows:

[0083]

[0084] Wherein, C PV,t is the light abandoned cost of photovoltaic; N PV is the number of photovoltaic power stations participating in scheduling in the regional power grid; λ PV is the unit light abandoned cost of photovoltaic, λ PV includes two parts: one part is the additional environmental cost brought by replacing coal-fired power generation with photovoltaic power generation, and the other part is the loss of abandoned photovoltaic power generation; α PV is the maximum prediction error coefficient of the output of photovoltaic, which is greater than or equal to 1, and the closer to 1, the higher the prediction accuracy; is the output prediction value of the k PV th photovoltaic at t time, is the output prediction value of the k PVThe photovoltaic scheduling plan value at the time t.

[0085] The formula for calculating the wind power abandonment cost is as follows:

[0086]

[0087] Wherein, C WT,t is the wind power abandonment cost; N WT is the number of wind power plants participating in scheduling in the regional power grid; λ WT is the unit wind power abandonment cost, λ WT includes two parts: one part is the additional environmental cost brought by the replacement of coal-fired power generation by wind power generation, and the other part is the loss of abandoned wind power generation; α WT is the maximum prediction error coefficient of the wind power output, which is greater than or equal to 1, and the closer to 1, the higher the prediction accuracy; is the output prediction value of the k WT th wind power plant at the time t, is the scheduling plan value of the k WT th wind power plant at the time t

[0088] The objective function C total of the target of the original scheduling plan of the new energy power station is as follows:

[0089]

[0090] Wherein, T is the scheduling time period.

[0091] S102: According to the weight of each new energy power station in the fair scheduling of the power system, the original scheduling plan of the new energy power station is redistributed to obtain the fair scheduling plan of the new energy power station:

[0092] Considering various indexes such as the equipment nature and output characteristics of the new energy station, the distribution according to the weight after the game fairness assignment can ensure that the power station with superior performance obtains more power generation plan, and the power station with poor performance obtains less scheduling plan. Thus, the scheduling plan of the new energy power station is distributed according to the comprehensive ranking priority, which can guarantee the fairness of the power station in obtaining the power generation space.

[0093] According to the weight of each new energy power station in the fair scheduling of the power system, the original scheduling plan of the new energy power station is redistributed to obtain the fair scheduling plan of the new energy power station, and the fair scheduling plan of the new energy power station is as follows:

[0094] Firstly, according to the original scheduling plan of the new energy power station and the weight of each new energy power station in the fair scheduling of the power system, the power station scheduling plan is preliminarily distributed:

[0095]

[0096] in, The initial fair allocation plan for the power plants is calculated according to their weights; For the kth PV The photovoltaic or the kth WT The weight of each wind farm This is the predicted power output of the power plant at time t. It is the kth PV The photovoltaic or the kth WT Preliminary scheduling plan for each wind farm, k PV / WT It is the kth PV The photovoltaic or the kth WT N wind farms PV / WT It refers to the number of photovoltaic or wind farms;

[0097] Secondly, the initial allocation plan for the power plant The predicted output value of the same power station at time t In comparison, the power plants that will participate in the scheduling at time t are further divided into two categories:

[0098] The first category is At this point, the power plant will finally execute the dispatch plan. Simultaneously calculate the grid's remaining absorption capacity plan for the power plant at time t. The specific calculation is as follows:

[0099]

[0100] The second category is At this point, the power station will be used as an intermediate scheduling plan, and the remaining power generation capacity of the power station at time t will be calculated. The specific calculation formula is as follows:

[0101]

[0102] Based on the number of Category II power plants, the remaining consumption plan is redistributed according to weights to obtain the dispatch plan adjustment quota for power plants under Category II conditions.

[0103]

[0104] Where, N PV / WT-1 N represents the number of Class I power plants after the initial allocation. PV / WT-2 This refers to the number of Category II power plants after the initial allocation;

[0105] Calculate the fair dispatch plan to be finally implemented for Category II power plants. The specific calculation formula is as follows:

[0106]

[0107] S103: According to the fair scheduling plan of the new energy power station, the constraints of the new energy unit and the safe and stable operation of the power grid are comprehensively considered, and the safe scheduling plan of the new energy station is finally determined, including:

[0108] The constraint conditions of the constraints of the new energy unit and the safe and stable operation of the power grid include:

[0109] AC power flow equation constraint:

[0110]

[0111] Where, P TH,i,t , P PV,i,t , P WT,i,t and P LD,i,t are the active power of the thermal power, photovoltaic, wind power and load of the i-th node at the t-th moment; Q TH,i,t , Q PV,i,t , Q WT,i,t and Q LD,i,t are the reactive power of the thermal power, photovoltaic, wind power and load of the i-th node at the t-th moment; G ij , B ij and δ ij are the conductance, reactance and phase angle between the i-th node and the j-th node, U i,t is the voltage amplitude of the i-th node at the t-th moment, U j,t is the voltage amplitude of the j-th node at the t-th moment, and n is the total number of nodes of the power system.

[0112] Thermal power unit output constraint:

[0113]

[0114] Where, and are the lower and upper limits of the output of the k TH -th thermal power unit;

[0115] Thermal power unit ramp rate constraint:

[0116]

[0117] Where, and are the maximum upward and downward ramping power of the k TH -th thermal power unit, is the size of the thermal power unit at t-1 moment;

[0118] New energy station output constraint:

[0119]

[0120] wherein the actual output value of photovoltaic and wind power is not higher than the output prediction value;

[0121] Node voltage safety constraint:

[0122] U i,min ≤U i,t ≤U i,max i = 1, 2, … N ND

[0123] wherein U i,min and U i,max are the lower and upper limits of the voltage of the i-th node; U i,t is the voltage amplitude of the i-th node; N ND is the number of system nodes;

[0124] N-1 safety constraint of node voltage:

[0125]

[0126] wherein U i,min and U i,max are the lower and upper limits of the voltage of the i-th node; and are the voltage amplitudes of the i-th node under the base state and the o-th N-1 fault event, respectively; N ND is the number of power system nodes; N FT is the number of N-1 faults of the power system;

[0127] N-1 safety constraint of line transmission power

[0128]

[0129] wherein P L,l,t and P L,l,max are the active power and the maximum transmission power of the l-th line; and are the active power of the l-th line under the base state and the o-th N-1 fault event, respectively; N L is the number of system branches, and U j,t is the voltage amplitude of the j-th node.

[0130] The power system safety new energy scheduling control device comprises:

[0131] A collection module collects all data in the new energy power generation scheduling process, including data such as installation capacity, power generation power, and fault outage of new energy stations (photovoltaic and wind power);

[0132] A constraint module is configured to store various constraint conditions in the new energy dispatching process considering the safety and economy of the power system, and store upper and lower limit values of the various constraint conditions.

[0133] A calculation module is configured to calculate the comprehensive dispatching result of the new energy station according to all data in the new energy generation dispatching process and various constraints, and present the comprehensive dispatching result of the new energy station in a visual manner.

[0134] The comprehensive dispatching part result is as shown in the figure. Figures 5-6

[0135] The computer device can be a terminal, and the computer device includes a processor, a memory, a communication interface, a display screen and an input device connected through a system bus. The processor of the computer device is configured to provide calculation and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operating system and the computer program in the non-volatile storage medium. The communication interface of the computer device is configured to perform wired or wireless communication with an external terminal. The wireless communication can be achieved through WIFI, an operator network, NFC (near field communication) or other technologies. The display screen of the computer device can be a liquid crystal display screen or an electronic ink display screen. The input device of the computer device can be a touch layer overlaid on the display screen, or a key, trackball or touchpad arranged on the shell of the computer device. In addition, the input device can be an external keyboard, touchpad or mouse, etc.

[0136] The embodiment of the present application further provides a computer device including a memory, a processor, and a computer program stored in the memory and capable of running on the processor, and the processor executes the computer program to realize the steps of the new energy power system safety dispatching method considering power flow as in the first aspect or any of the corresponding embodiments.

[0137] The embodiment of the present application further provides a computer readable storage medium, which stores a computer program, and the computer program is executed by a processor to realize the steps of the new energy power system safety dispatching method considering power flow as in the first aspect or any of the corresponding embodiments.

[0138] ​Those skilled in the art will appreciate that embodiments of the present application can be readily used as software, hardware, or a combination of software and hardware. In a software embodiment, the methods can be tangibly embodied in a machine-readable storage medium having stored thereon instructions that can be used to program a computer to perform any of the methods. The software implementation can be initialized by loading and executing a set of instructions arranged to perform one of the methods into the computer's memory. Alternatively, hard-wired circuitry can be used in place of, or in combination with, software instructions. Thus, the

[0139] The present application is described in reference to the flowchart illustrations and / or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will 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, create means for implementing the functions specified in the flowchart illustrations and / or block diagrams. Figure 1 one or more functions specified in one or more of the flowchart illustrations and / or block diagrams. Figure 1 means for performing the functions specified in one or more of the flowchart illustrations and / or block diagrams.

[0140] These computer program instructions can also be stored in a computer- readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instructions which implement the functions specified in the flowchart illustrations and / or block diagrams. Figure 1 one or more functions specified in one or more of the flowchart illustrations and / or block diagrams. Figure 1 means for performing the functions specified in one or more of the flowchart illustrations and / or block diagrams.

[0141] These computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart illustrations and / or block diagrams. Figure 1 one or more functions specified in one or more of the flowchart illustrations and / or block diagrams. Figure 1 means for performing the functions specified in one or more of the flowchart illustrations and / or block diagrams.

[0142] While preferred embodiments of the application have been described, modifications and variations can be apparent to those skilled in the art once aware of the general underlying concepts. Accordingly, the appended claims are intended to encompass all modifications and variations as falling within the scope of the application.

[0143] It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application cover modifications and variations of this application provided they come within the scope of the appended claims and their equivalents.

Claims

1. A method for safe dispatching of a new energy power system considering power flow, characterized in that, The method comprises the following steps: For a power system with a high proportion of new energy, the coal consumption cost of thermal power units and the cost of abandoned wind and light of new energy power generation are considered to schedule the power system to obtain an original scheduling plan of new energy power stations; According to the weight of each new energy power station in the fair scheduling of the power system, the original scheduling plan of the new energy power station is redistributed to obtain a fair scheduling plan of the new energy power station; According to the fair scheduling plan of the new energy power station, the constraints of the new energy units and the safe and stable operation constraints of the power grid are comprehensively considered to finally determine the safe scheduling plan of the new energy station; The objective of the original scheduling plan of the new energy power station is to minimize the sum of the generation cost of the power system, which includes the coal consumption cost of thermal power units, the abandoned light cost of photovoltaic, and the abandoned wind cost of wind power; Objective function of a target of an original dispatching plan of a new energy power station The specific formula is as follows: ； Wherein, T is a scheduling time period, is the coal consumption cost of the thermal power unit, is the photovoltaic light abandonment cost, is the wind power abandonment cost, and t is the time. According to the weight of each new energy power station in the fair scheduling of the power system, the original scheduling plan of the new energy power station is redistributed to obtain a fair scheduling plan of the new energy power station, which is as follows: First, according to the original scheduling plan of the new energy power station and the weight of each new energy power station in the fair scheduling of the power system, the scheduling plan of the power station is preliminarily allocated: ； wherein, is the initial fairness allocation plan of the power station calculated according to the weights, is the weight of the kth PV photovoltaic or the kth WT wind power plant, is the output prediction value of the power station at time t, is the preliminary dispatching plan of the kth PV photovoltaic or the kth WT wind power plant, is the kth PV photovoltaic or the kth WT wind power plant, is the number of photovoltaics or wind power plants. Secondly, the preliminary allocation plan of power plants the predicted output value of the power plant at time t By comparison, the power plants participating in dispatch at time t are further divided into two categories: The first type is At this time, the final scheduling plan executed by the power station At the same time, the remaining accommodation plan of the power grid to the power station at time t is calculated The specific calculation is: ； The second type is At this time, the power station will be as an intermediate scheduling plan, while calculating the remaining power generation space of the power station at time t The specific calculation formula is: ； According to the number of the second type of power station, the remaining consumption plan is re-allocated according to the weight, to obtain the scheduling plan adjustment quota of the power station under the second type of situation : ； wherein, is the number of first type power plants after the initial allocation, is the number of second type power plants after the initial allocation; The final fair dispatching plan of the second type power station is calculated The specific calculation formula is: 。 2. The method according to claim 1, wherein: The calculation formula of the coal consumption cost of thermal power units is as follows: ； wherein, is the coal consumption cost of the thermal power unit; N TH is the number of thermal power units participating in dispatch within the regional power grid; , , is the output coal consumption cost coefficient of the given k TH th thermal power unit; is the output size of the thermal power unit at time t. The calculation formula of the abandoned light cost of photovoltaic is as follows: ； wherein, is the photovoltaic light waste cost; N PV is the number of photovoltaic power stations participating in dispatch within the regional power grid; is the unit photovoltaic light waste cost, includes two parts: one part is the additional environmental cost brought by replacing coal-fired power generation with photovoltaic power generation, and the other part is the loss of abandoned photovoltaic power generation; is the maximum prediction error coefficient of the photovoltaic output, and the value is greater than or equal to 1; is the output prediction value of the k PV th photovoltaic at time t, is the dispatch planning value of the k PV th photovoltaic at time t. The calculation formula of the abandoned wind cost of wind power is as follows: ； wherein, is the cost of wind power curtailment; N WT is the number of wind power plants participating in dispatch within the regional power grid; is the unit cost of wind power curtailment, includes two parts: one part is the additional environmental cost brought by the replacement of coal-fired power generation with wind power generation, and the other part is the loss of curtailed wind power generation; is the maximum prediction error coefficient of wind power output, which is greater than or equal to 1; is the predicted output value of the k WT th wind farm at time t, is the dispatch planning value of the k WT th wind farm at time t. 3.The method of claim 2, wherein the method further comprises: determining a power flow of the new energy power system according to the power flow equation; and determining a power flow of the new energy power system according to the power flow equation. The constraint conditions of the constraints of the new energy units and the safe and stable operation constraints of the power grid include: AC power flow equation constraint: ； wherein, , , and are the active power of the thermal power, photovoltaic power, wind power and load of the i-th node at the t-th time; , , and are the reactive power of the thermal power, photovoltaic power, wind power and load of the i-th node at the t-th time; , and are the conductance, reactance and phase angle between the i-th node and the j-th node, is the voltage amplitude of the i-th node at the t-th time, is the voltage amplitude of the j-th node at the t-th time, and n is the total number of nodes of the power system. Thermal power unit output constraint: ； wherein, and are the lower and upper limits of the kth TH thermal power unit output, respectively. Thermal power unit climbing rate constraint: ； wherein, and are the kth TH maximum upward and downward ramping power of the thermal power unit, respectively, is the output of the thermal power unit at time t-1. New energy station output constraint: ； Wherein, the actual output value of photovoltaic and wind power is not higher than the output prediction value; Node voltage safety constraint: ； wherein, and Vmin(i) and Vmax(i) are the lower and upper voltage limits of the i-th node, respectively; Vamp(i) is the voltage amplitude of the i-th node; N is the number of system nodes; N-1 safety constraint of node voltage: ； wherein, and Vmin(i) and Vmax(i) are the lower and upper voltage limits of the ith node, respectively; and Vamp(i) and Vamp(i,o) are the voltage amplitudes of the ith node in the base case and in the oth N-1 contingency, respectively; N is the number of nodes of the power system; N is the number of N-1 contingencies of the power system; N-1 safety constraint of line transmission power ； where, and are the active power and the maximum transmission power of the lth line, respectively; and are the active power of the lth line at the base state and the oth N-1 contingency, respectively; is the number of system branches, is the voltage magnitude of the jth bus.

4. The device for safe dispatching of a new energy power system considering power flow according to claim 1, characterized in that, The method comprises the following steps: The collecting module is used to collect all data in the new energy power generation scheduling process, including the installation capacity, power generation, and fault outage data of the new energy station, and the new energy includes photovoltaic and wind power; The constraint module is used to store various constraint conditions in the new energy scheduling process considering the safety of the power system, and store the upper and lower limit values of various constraint conditions; The calculation module is used to comprehensively consider the fair scheduling plan of the new energy power station proposed according to all data in the new energy power generation scheduling process and various constraints, calculate the comprehensive scheduling result of the new energy station, and present the comprehensive scheduling result of the new energy station in a visual way.

5. A computer device comprising a memory, a processor, and a computer program stored in the memory and capable of running on the processor, characterized in that, The processor executes the computer program to realize the steps of the method for safe scheduling of a new energy power system considering power flow according to any one of claims 1 to 3.

6. A computer-readable storage medium storing a computer program, the computer program comprising instructions that, when executed by a computer, cause the computer to perform the method of any one of claims 1 to 5. The computer program is executed by the processor to realize the steps of the method for safe scheduling of a new energy power system considering power flow according to any one of claims 1 to 3.

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