A wind-solar power prediction deviation correction method and device for a wind-solar power station

Abstract

The application relates to the field of new energy power generation technology and discloses a wind-solar power prediction deviation correction method and device for a wind-solar power station, which comprises the following steps: collecting power grid dispatching instructions, wind-solar maximum available power values, wind-solar combined short-term power prediction values and grid-connected point actual power values; judging the current operation state of an energy storage station based on the wind-solar maximum available power and the power grid dispatching instructions; when the current operation state of the energy storage station is a free power generation state and there is an error between the wind-solar combined short-term power prediction values and the grid-connected point actual power values, determining a wind-solar power prediction deviation compensation amount based on the wind-solar combined short-term power prediction values and the grid-connected point actual power values; and correcting the wind-solar power prediction deviation of the wind-solar power station based on the wind-solar power prediction deviation compensation amount. The application realizes correction of the wind-solar power prediction deviation, improves the comprehensive benefits of the wind-solar power station and guarantees the safe and reliable operation of a power system.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of new energy power generation, in particular to a wind-solar power prediction deviation correction method and device for a wind-solar storage power station. BACKGROUND

[0002] With the rapid increase of new energy installation, a large amount of new energy is connected to the power grid, and its volatility, randomness and intermittency have brought great challenges to the safe and stable operation of the power grid. Therefore, it is increasingly urgent to timely and accurately grasp the wind-solar resource situation. At present, wind-solar power prediction systems have been set up in various new energy power stations. The wind-solar power prediction system can generate wind-solar resource ultra-short-term and short-term power prediction results through model training based on external meteorological data.

[0003] Due to the influence of multiple factors such as the quality of external meteorological data, the prediction model, the geographical location, and the climate conditions, the accuracy of the wind-solar power prediction system varies. The stable operation of the power system requires real-time balance between the source and the load. With the continuous improvement of wind-solar installation, the prediction error of wind-solar power further widens the gap between the source and the load, thereby affecting the safe and reliable operation of the power system. SUMMARY

[0004] Therefore, the present application provides a wind-solar power prediction deviation correction method and device for a wind-solar storage power station to solve the problem of large prediction error of the wind-solar power prediction system, which affects the safe and reliable operation of the power system.

[0005] In a first aspect, the present application provides a wind-solar power prediction deviation correction method for a wind-solar storage power station, which comprises:

[0006] collecting the power grid dispatching instruction, the wind-solar maximum available power value, the wind-solar joint short-term power prediction value, and the grid-connected point actual power value;

[0007] judging the current operating state of the energy storage station based on the wind-solar maximum available power and the power grid dispatching instruction;

[0008] when the current operating state of the energy storage station is a free power generation state, and there is an error between the wind-solar joint short-term power prediction value and the grid-connected point actual power value, determining the wind-solar power prediction deviation compensation amount based on the wind-solar joint short-term power prediction value and the grid-connected point actual power value;

[0009] correcting the wind-solar power prediction deviation of the wind-solar storage power station based on the wind-solar power prediction deviation compensation amount.

[0010] The wind-solar power prediction deviation correction method of the wind-solar power station provided in the embodiment corrects the wind-solar power prediction deviation of the wind-solar power station by using the wind-solar power prediction deviation compensation amount, realizes the correction of the wind-solar power prediction deviation, avoids the examination of the wind-solar power station caused by the wind-solar power prediction deviation, improves the comprehensive benefit of the wind-solar power station, and ensures the safe and reliable operation of the power system.

[0011] In an optional implementation, the current operating state of the energy storage station is determined based on the maximum wind-solar available power and the grid dispatching instruction, and includes:

[0012] The correction coefficient is obtained, and the correction factor is calculated based on the maximum wind-solar available power and the correction coefficient;

[0013] The grid dispatching instruction is compared with the sum of the maximum wind-solar available power and the correction factor;

[0014] If the grid dispatching instruction is greater than / equal to the sum of the maximum wind-solar available power and the correction factor, the current operating state of the energy storage station is the free power generation state.

[0015] The wind-solar power prediction deviation correction method of the wind-solar power station provided in the embodiment corrects the wind-solar power prediction deviation of the wind-solar power station by using the wind-solar power prediction deviation compensation amount, realizes the correction of the wind-solar power prediction deviation, avoids the examination of the wind-solar power station caused by the wind-solar power prediction deviation, improves the comprehensive benefit of the wind-solar power station, and ensures the safe and reliable operation of the power system.

[0016] In an optional implementation, when the current operating state of the energy storage station is the free power generation state, and there is an error between the wind-solar combined short-term power prediction value and the actual power output value of the grid connection point, the wind-solar power prediction deviation compensation amount is determined based on the wind-solar combined short-term power prediction value and the actual power output value of the grid connection point, and includes:

[0017] When the current operating state of the energy storage station is the free power generation state, the prediction deviation compensation state of the energy storage station is set to the prediction deviation compensation standby state;

[0018] The preset correction error is obtained, and the sum of the wind-solar combined short-term power prediction value and the actual power output value of the grid connection point and the preset correction error is compared;

[0019] If the combined short-term power forecast of wind and solar power is not equal to the sum of the actual power generated at the grid connection point and the preset correction error, then the wind and solar power forecast deviation compensation amount is calculated based on the combined short-term power forecast of wind and solar power and the actual power generated at the grid connection point.

[0020] This embodiment provides a method for correcting wind and solar power prediction deviations in a wind-solar-storage power station. Only when two conditions are met—that the energy storage station is in a free-generation state and the sum of the combined short-term wind and solar power prediction value and the actual power generated at the grid connection point plus the preset correction error—can a deviation in wind and solar power prediction be determined. This method achieves accurate judgment of wind and solar power prediction deviations and makes the compensation amount for these deviations more aligned with maximizing the benefits of the wind-solar-storage power station. It also enables the grid connection point power to track the combined short-term wind and solar power prediction results, providing crucial support to the power grid.

[0021] In one optional implementation, the wind-solar-storage power prediction deviation is corrected based on the wind-solar power prediction deviation compensation amount, including:

[0022] The capacity configuration range for energy storage power stations to participate in deviation compensation is determined based on the short-term power forecast values ​​of combined wind and solar power.

[0023] Compare the wind and solar power prediction deviation compensation amount with the capacity configuration range of energy storage power stations participating in deviation compensation;

[0024] If the wind and solar power prediction deviation compensation amount is within the capacity configuration range for the energy storage power station to participate in deviation compensation, then the energy storage power station will be charged and discharged based on the wind and solar power prediction deviation compensation amount to achieve wind and solar power prediction deviation correction.

[0025] This embodiment provides a method for correcting wind and solar power prediction deviations in a wind-solar-storage power station. Based on the combined short-term power prediction value of wind and solar power, the capacity configuration range for the energy storage station to participate in deviation compensation is determined. In the process of correcting wind and solar power prediction deviations, the scientific and rational use of energy storage capacity is realized, ensuring the normal operation of the energy storage station and improving the overall benefits of the wind-solar-storage power station.

[0026] In one optional implementation, if the wind and solar power prediction deviation compensation amount meets the capacity configuration range for the energy storage power station to participate in deviation compensation, then the energy storage power station is charged and discharged based on the wind and solar power prediction deviation compensation amount to achieve wind and solar power prediction deviation correction, including:

[0027] If the wind and solar power prediction deviation compensation amount is positive, then the absolute value of the wind and solar power prediction deviation compensation amount is used as the discharge power value, and the energy storage power station is controlled to discharge based on the discharge power value in order to achieve wind and solar power prediction deviation correction.

[0028] Or, if the wind and light power prediction deviation compensation amount is a negative value, the absolute value of the wind and light power prediction deviation compensation amount is taken as the charging power value, and the energy storage power station is controlled to charge based on the charging power value to realize wind and light power prediction deviation correction.

[0029] The wind and light power prediction deviation correction method for the wind and light storage power station provided in the embodiment realizes determination of the discharging state or the charging state of the energy storage power station, and further realizes reasonable control of the energy storage power station and effective correction of the wind and light power prediction deviation of the wind and light storage power station.

[0030] In an optional implementation, the wind and light power prediction deviation correction of the wind and light storage power station based on the wind and light power prediction deviation compensation amount further includes:

[0031] If the wind and light power prediction deviation compensation amount does not conform to the capacity configuration range of the energy storage power station participating in deviation compensation, the energy storage power station is controlled to correct the wind and light power prediction deviation based on the limit value corresponding to the capacity configuration range of the energy storage power station participating in deviation compensation.

[0032] In a second aspect, the present application provides a wind and light power prediction deviation correction device for a wind and light storage power station, which comprises:

[0033] The acquisition module is configured to acquire the grid dispatching instruction, the wind and light maximum available power value, the wind and light joint short-term power prediction value, and the grid-connected point actual power value.

[0034] The determination module is configured to determine the current operation state of the energy storage power station based on the wind and light maximum available power and the grid dispatching instruction.

[0035] The determination module is configured to determine the current operation state of the energy storage power station based on the wind and light maximum available power and the grid dispatching instruction.

[0036] The correction module is configured to correct the wind and light power prediction deviation of the wind and light storage power station based on the wind and light power prediction deviation compensation amount.

[0037] In a third aspect, the present application provides a computer device, which comprises a memory and a processor, the memory and the processor are communicatively connected with each other, the memory stores computer instructions, and the processor executes the computer instructions to perform the wind and light power prediction deviation correction method of the wind and light storage power station according to the first aspect or any one of the corresponding embodiments thereof.

[0038] In a fourth aspect, the present application provides a computer readable storage medium, having stored thereon computer instructions for causing a computer to execute the wind-solar power prediction deviation correction method of the wind-solar storage power station according to the first aspect or any one of the corresponding embodiments thereof.

[0039] In a fifth aspect, the present application provides a computer program product comprising computer instructions for causing a computer to execute the wind-solar power prediction deviation correction method of the wind-solar storage power station according to the first aspect or any one of the corresponding embodiments thereof. BRIEF DESCRIPTION OF DRAWINGS

[0040] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings required to be used in the specific embodiments or prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0041] Figure 1 is a structural schematic diagram of a wind-solar storage integrated power station according to an embodiment of the present application;

[0042] Figure 2 is a flowchart of a wind-solar power prediction deviation correction method of a wind-solar storage power station according to an embodiment of the present application;

[0043] Figure 3 is a flowchart of another wind-solar power prediction deviation correction method of a wind-solar storage power station according to an embodiment of the present application;

[0044] Figure 4 is a flowchart of still another wind-solar power prediction deviation correction method of a wind-solar storage power station according to an embodiment of the present application;

[0045] Figure 5 is a flowchart of yet another wind-solar power prediction deviation correction method of a wind-solar storage power station according to an embodiment of the present application;

[0046] Figure 6 is a structural block diagram of a wind-solar power prediction deviation correction device of a wind-solar storage power station according to an embodiment of the present application;

[0047] Figure 7 is a hardware structure schematic diagram of a computer device according to an embodiment of the present application. DETAILED DESCRIPTION

[0048] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0049] As shown in Figure 1 The wind-solar-storage integrated power station is composed of a power deviation compensation device, a wind-solar-storage coordinated controller, a wind power prediction device, a photovoltaic power prediction device, a grid-connected point power acquisition device, a wind energy management platform, a photovoltaic energy management platform and an energy storage energy management platform.

[0050] The embodiment of the present application provides a wind-solar power prediction deviation correction method for a wind-solar-storage power station. It should be noted that the wind-solar power prediction deviation correction method provided by the embodiment of the present application can be a power deviation compensation device in a wind-solar-storage integrated power station. The power deviation compensation device can be realized by software, hardware or a combination of software and hardware to become part or all of an electronic device. The electronic device can be a server or a terminal. The server in the embodiment of the present application can be a server or a server cluster composed of multiple servers. The terminal in the embodiment of the present application can be a smart phone, a personal computer, a tablet computer and a smart robot or other smart hardware devices. In the following method embodiment, the execution subject is taken as an example to be described.

[0051] According to the embodiment of the present application, a wind-solar power prediction deviation correction method for a wind-solar-storage power station is provided. It should be noted that the steps shown in the flowchart of the drawings can be executed in a computer system such as a group of computer executable instructions. Although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that here.

[0052] In the present embodiment, a wind-solar power prediction deviation correction method for a wind-solar-storage power station is provided, which can be used in the power deviation compensation device, Figure 2 The flowchart of the wind-solar power prediction deviation correction method for a wind-solar-storage power station according to the embodiment of the present application is shown in Figure 2 The flowchart includes the following steps:

[0053] Step S201, collecting grid dispatching instructions, wind-solar maximum available power values, wind-solar joint short-term power prediction values and grid-connected point actual power values.

[0054] Specifically, the wind power prediction device and the photovoltaic power prediction device predict short-term and ultra-short-term power values of the power station according to the external meteorological data and the power station characteristics and upload to the power grid dispatch center; the power grid dispatch center is responsible for generating a power station dispatch curve according to the wind and light power prediction and the load prediction result and issuing to the power station for execution; the wind and light storage coordination controller is responsible for receiving the power grid dispatch instruction and distributing to the wind power energy management platform, the photovoltaic energy management platform and the energy storage energy management platform; the wind power energy management platform, the photovoltaic energy management platform and the energy storage energy management platform are responsible for executing the dispatch instruction issued by the wind and light storage coordination controller and feeding back the wind and light maximum available power to the power deviation compensation device; the power deviation compensation device collects the grid point actual power value, the power grid dispatch instruction, the wind and light maximum available power value and the wind and light combined short-term power prediction value, and according to the logic judgment, the energy storage participates in the prediction deviation compensation, and the power value that needs to be compensated is issued to the wind and light storage coordination controller; when the wind and light storage coordination controller receives the energy storage instruction issued by the power deviation compensation device, the instruction is directly issued to the energy storage energy management platform for execution.

[0055] Step S202, judging the current running state of the energy storage station based on the wind and light maximum available power and the power grid dispatch instruction.

[0056] Step S203, when the current running state of the energy storage station is the free power generation state, and there is an error between the wind and light combined short-term power prediction value and the grid point actual power value, determining the wind and light power prediction deviation compensation amount based on the wind and light combined short-term power prediction value and the grid point actual power value.

[0057] Step S204, correcting the wind and light power prediction deviation of the wind and light storage power station based on the wind and light power prediction deviation compensation amount.

[0058] The wind and light power prediction deviation correction method of the wind and light storage power station provided in the embodiment, by judging the current running state of the energy storage station based on the wind and light maximum available power and the power grid dispatch instruction, and then determining the wind and light power prediction deviation compensation amount in the case that the current running state of the energy storage station is the free power generation state and there is an error between the wind and light combined short-term power prediction value and the grid point actual power value, correcting the wind and light power prediction deviation of the wind and light storage power station by using the wind and light power prediction deviation compensation amount, realizing the correction of the wind and light power prediction deviation, avoiding the examination of the wind and light storage power station caused by the wind and light power prediction deviation, improving the comprehensive benefit of the wind and light storage power station, and ensuring the safe and reliable operation of the power system.

[0059] In the embodiment, a wind and light power prediction deviation correction method of a wind and light storage power station is provided, which can be used in the power deviation compensation device, Figure 3 is a flow chart of a wind and light power prediction deviation correction method of a wind and light storage power station according to an embodiment of the present application, as Figure 3 shown, the flow includes the following steps:

[0060] In step S301, the power grid dispatching instruction, the maximum available wind power value, the wind-solar joint short-term power prediction value, and the real power value at the grid-connected point are collected. For details, please refer to Figure 2 In step S201 of the embodiment shown in the figure, no further elaboration is given here.

[0061] In step S302, the current operating state of the energy storage station is determined based on the maximum available wind power and the power grid dispatching instruction.

[0062] Specifically, the above step S302 includes:

[0063] In step S3021, a correction coefficient is obtained, and a correction factor is calculated based on the maximum available wind power and the correction coefficient.

[0064] Specifically, the calculation formula of the correction factor P0 is as follows:

[0065] P0=k×(P2+P3) (1)

[0066] Wherein, k represents the correction coefficient, which can be determined according to the dispatching center rules of the power station, P2 represents the maximum available wind power value, and P3 represents the maximum available photovoltaic power value.

[0067] In step S3022, the power grid dispatching instruction is compared with the sum of the maximum available wind power and the correction factor.

[0068] In step S3023, if the power grid dispatching instruction is greater than / equal to the sum of the maximum available wind power and the correction factor, the current operating state of the energy storage station is the free power generation state.

[0069] Specifically, when the power grid dispatching instruction P satisfies the following judgment formula, the current operating state of the energy storage station is the free power generation state:

[0070] P≥P2+P3+P0 (2)

[0071] Further, when the current operating state of the energy storage station is the free power generation state, the state word w of the energy storage station participating in the prediction deviation compensation is set to 1.

[0072] Further, if the power grid dispatching instruction P does not satisfy the above formula (2), the energy storage station exits the prediction deviation compensation standby state, and the state word w of the energy storage station participating in the prediction deviation compensation is set to 0.

[0073] In step S303, when the current operating state of the energy storage station is the free power generation state, and there is an error between the wind-solar joint short-term power prediction value and the real power value at the grid-connected point, the wind-solar power prediction deviation compensation amount is determined based on the wind-solar joint short-term power prediction value and the real power value at the grid-connected point. For details, please refer toFigure 2 Step S203 of the illustrated embodiment will not be described here again.

[0074] Step S304, based on the wind and light power prediction deviation compensation amount, the wind and light power prediction deviation of the wind and light storage power station is corrected. For details, please refer to Figure 2 Step S204 of the illustrated embodiment will not be described here again.

[0075] The wind and light power prediction deviation correction method of the wind and light storage power station provided in this embodiment determines the current operating state of the energy storage station through the grid dispatching instruction and the maximum wind and light power, realizes accurate judgment of the current operating state of the energy storage station, and introduces a correction factor to make the judgment of the current operating state of the energy storage station more accurate, laying a foundation for subsequent wind and light power prediction deviation compensation control.

[0076] In this embodiment, a wind and light power prediction deviation correction method of a wind and light storage power station is provided, which can be used in the power deviation compensation device described above, Figure 4 is a flow chart of a wind and light power prediction deviation correction method of a wind and light storage power station according to an embodiment of the application, as Figure 4 The flow chart includes the following steps:

[0077] Step S401, the grid dispatching instruction, the maximum wind and light power value, the wind and light combined short-term power prediction value and the grid-connected point actual power value are collected. For details, please refer to Figure 3 Step S301 of the illustrated embodiment will not be described here again.

[0078] Step S402, based on the maximum wind and light power and the grid dispatching instruction, the current operating state of the energy storage station is determined. For details, please refer to Figure 3 Step S302 of the illustrated embodiment will not be described here again.

[0079] Step S403, when the current operating state of the energy storage station is free power generation state, and there is an error between the wind and light combined short-term power prediction value and the grid-connected point actual power value, then based on the wind and light combined short-term power prediction value and the grid-connected point actual power value, the wind and light power prediction deviation compensation amount is determined.

[0080] Specifically, the above step S403 includes:

[0081] Step S4031, when the current operating state of the energy storage station is free power generation state, the prediction deviation compensation state of the energy storage station is set to the prediction deviation compensation standby state.

[0082] Step S4032, a preset correction error is obtained, and the sum of the wind and light combined short-term power prediction value and the grid-connected point actual power value and the preset correction error is compared.

[0083] Step S4033, if the sum of the wind-solar combined short-term power prediction value and the actual power value of the grid-connected point is not equal to the preset correction error, then calculate the wind-solar power prediction deviation compensation based on the wind-solar combined short-term power prediction value and the actual power value of the grid-connected point.

[0084] Specifically, when w = 1, the energy storage power station enters the predicted deviation compensation standby state, and at this time, whether there is an error between the wind-solar combined short-term power prediction value and the actual power value of the grid-connected point is determined according to the following determination formula:

[0085] P4≠P1+△P (3)

[0086] Wherein, P4 represents the wind-solar combined short-term power prediction value, P1 represents the actual power value of the grid-connected point, and △P represents the preset correction error, which can be adaptively adjusted according to the operation data of the wind-solar energy storage power station.

[0087] Further, if the wind-solar combined short-term power prediction value and the actual power value of the grid-connected point meet the above determination formula (3), there is an error between the wind-solar combined short-term power prediction value and the actual power value of the grid-connected point, and the deviation needs to be corrected.

[0088] Further, when P4 = P1 + △P, the energy storage instruction is assigned to 0, and at this time, there is no error between the wind-solar combined short-term power prediction value and the actual power value of the grid-connected point.

[0089] Further, the calculation formula of the wind-solar power prediction deviation compensation P5 is as follows:

[0090] P5=P4-P1 (4)

[0091] Step S404, based on the wind-solar power prediction deviation compensation, the wind-solar energy storage power station is corrected. For details, please refer to Figure 3 The step S304 of the embodiment shown in the figure will not be described here.

[0092] The wind-solar power prediction deviation correction method provided in this embodiment can determine whether there is a wind-solar power prediction deviation when the two judgment conditions that the operation state of the energy storage power station is in the free power generation state and the sum of the wind-solar combined short-term power prediction value and the actual power value of the grid-connected point is not equal to the preset correction error are met, which realizes accurate judgment of the wind-solar power prediction deviation, and makes the wind-solar power prediction deviation compensation more consistent with the maximization of the benefit of the wind-solar energy storage power station, realizes the grid-connected point power tracking the wind-solar combined short-term power prediction result, and provides key support for the power grid.

[0093] In this embodiment, a wind-solar energy storage power station wind-solar power prediction deviation correction method is provided, which can be used in the power deviation compensation device, Figure 5is a flowchart of a wind-solar power prediction deviation correction method of a wind-solar power station according to an embodiment of the present application, as shown in Figure 5 The flowchart includes the following steps:

[0094] In step S501, the grid dispatching instruction, the maximum wind-solar power generation value, the wind-solar joint short-term power prediction value, and the grid-connected point actual power generation value are collected. For details, please refer to step S401 of the embodiment shown in Figure 4 The embodiment is not described here again.

[0095] In step S502, the current operating state of the energy storage station is determined based on the maximum wind-solar power generation and the grid dispatching instruction. For details, please refer to step S402 of the embodiment shown in Figure 4 The embodiment is not described here again.

[0096] In step S503, when the current operating state of the energy storage station is the free power generation state, and there is an error between the wind-solar joint short-term power prediction value and the grid-connected point actual power generation value, the wind-solar power prediction deviation compensation amount is determined based on the wind-solar joint short-term power prediction value and the grid-connected point actual power generation value. For details, please refer to step S403 of the embodiment shown in Figure 4 The embodiment is not described here again.

[0097] In step S504, the wind-solar power prediction deviation correction is performed on the wind-solar power station based on the wind-solar power prediction deviation compensation amount.

[0098] Specifically, the above step S504 includes:

[0099] In step S5041, the capacity configuration range of the energy storage station participating in deviation compensation is determined based on the wind-solar joint short-term power prediction value.

[0100] Specifically, the wind-solar joint short-term power prediction value not less than 80% is selected as the reference value, the energy storage configuration capacity should cover the wind-solar power ±20% deviation, considering that the use boundary of the electrochemical energy storage is 5% to 95% of its own capacity, the energy storage configuration proportion is not less than 46% (23% x 2) of the wind-solar installed capacity, and then the capacity configuration range of the energy storage station participating in deviation compensation is determined as (-23%, +23%).

[0101] In step S5042, the wind-solar power prediction deviation compensation amount is compared with the capacity configuration range of the energy storage station participating in deviation compensation.

[0102] In step S5043, if the wind-solar power prediction deviation compensation amount meets the capacity configuration range of the energy storage station participating in deviation compensation, the charge and discharge control of the energy storage station is performed based on the wind-solar power prediction deviation compensation amount, so as to realize the wind-solar power prediction deviation correction.

[0103] Specifically, if the wind-solar power prediction deviation compensation amount does not conform to the capacity configuration range of the energy storage power station participating in the deviation compensation, the energy storage power station is controlled to correct the wind-solar power prediction deviation based on the limit value corresponding to the capacity configuration range of the energy storage power station participating in the deviation compensation.

[0104] Further, if the wind-solar power prediction deviation compensation amount is less than-23%, the energy storage power station is controlled to correct the wind-solar power prediction deviation according to-23%; if the wind-solar power prediction deviation compensation amount is greater than +23%, the energy storage power station is controlled to correct the wind-solar power prediction deviation according to +23%.

[0105] In some optional embodiments, the step S5043 includes:

[0106] In step a1, if the wind-solar power prediction deviation compensation amount is positive, the absolute value of the wind-solar power prediction deviation compensation amount is taken as a discharge power value, and the energy storage power station is controlled to discharge based on the discharge power value to correct the wind-solar power prediction deviation.

[0107] Specifically, if P5 is positive, the energy storage power station is controlled to be in a discharging state, and the discharge power value is the absolute value of the wind-solar power prediction deviation compensation amount.

[0108] In step a2, alternatively, if the wind-solar power prediction deviation compensation amount is negative, the absolute value of the wind-solar power prediction deviation compensation amount is taken as a charging power value, and the energy storage power station is controlled to charge based on the charging power value to correct the wind-solar power prediction deviation.

[0109] Specifically, if P5 is negative, the energy storage power station is controlled to be in a charging state, and the charging power value is the absolute value of the wind-solar power prediction deviation compensation amount.

[0110] Further, the discharge power value or the charging power value is sent to a wind-solar storage coordination controller, the wind-solar storage coordination controller issues an energy storage instruction to an energy storage energy management platform, the energy storage energy management platform performs charging and discharging control according to the energy storage instruction, and the grid-connected point power follows the wind-solar short-term prediction result.

[0111] The wind-solar power prediction deviation correction method for the wind-solar storage power station provided in the embodiment determines the capacity configuration range of the energy storage power station participating in the deviation compensation according to the wind-solar combined short-term power prediction value, realizes scientific and reasonable use of the energy storage capacity in the wind-solar power prediction deviation correction process, ensures the normal operation of the energy storage power station, and improves the comprehensive benefits of the wind-solar storage power station.

[0112] There is also provided in the embodiment a wind-solar power prediction deviation correction device for a wind-solar power station, which is used to implement the above-mentioned embodiments and preferred embodiments, and details of which have been described above. As used below, the term "module" can be a combination of software and / or hardware that implements a predetermined function. Although the device described in the following embodiments is preferably implemented in software, implementation in hardware, or a combination of software and hardware, is also possible and contemplated.

[0113] The embodiment provides a wind-solar power prediction deviation correction device for a wind-solar power station, which, as shown in the accompanying drawings, comprises: Figure 6

[0114] The collection module 601 is configured to collect a power grid dispatching instruction, a wind-solar maximum available power value, a wind-solar joint short-term power prediction value, and a grid-connected point actual power value.

[0115] The determination module 602 is configured to determine a current operating state of the energy storage station based on the wind-solar maximum available power and the power grid dispatching instruction.

[0116] The determination module 603 is configured to, when the current operating state of the energy storage station is a free power generation state and there is an error between the wind-solar joint short-term power prediction value and the grid-connected point actual power value, determine a wind-solar power prediction deviation compensation amount based on the wind-solar joint short-term power prediction value and the grid-connected point actual power value.

[0117] The correction module 604 is configured to correct a wind-solar power prediction deviation of the wind-solar power station based on the wind-solar power prediction deviation compensation amount.

[0118] In some optional embodiments, the determination module 602 comprises:

[0119] The first calculation unit is configured to obtain a correction coefficient, and calculate a correction factor based on the wind-solar maximum available power and the correction coefficient.

[0120] The first comparison unit is configured to compare the power grid dispatching instruction with a sum of the wind-solar maximum available power and the correction factor.

[0121] The determination unit is configured to, if the power grid dispatching instruction is greater than / equal to the sum of the wind-solar maximum available power and the correction factor, determine that the current operating state of the energy storage station is the free power generation state.

[0122] In some optional embodiments, the determination module 603 comprises:

[0123] The setting unit is configured to, when the current operating state of the energy storage station is the free power generation state, set the energy storage station participating in the prediction deviation compensation state to a prediction deviation compensation standby state.

[0124] ​a second comparison unit configured to obtain a preset correction error, and compare the wind-solar combined short-term power prediction value with a sum of the actual power value of the grid-connected point and the preset correction error;

[0125] a second calculation unit configured to, if the wind-solar combined short-term power prediction value is not equal to the sum of the actual power value of the grid-connected point and the preset correction error, calculate a wind-solar power prediction deviation compensation amount based on the wind-solar combined short-term power prediction value and the actual power value of the grid-connected point.

[0126] In some optional embodiments, the correction module 604 comprises:

[0127] a determination unit configured to determine a capacity configuration range of the energy storage power station participating in the deviation compensation based on the wind-solar combined short-term power prediction value;

[0128] a third comparison unit configured to compare the wind-solar power prediction deviation compensation amount with the capacity configuration range of the energy storage power station participating in the deviation compensation;

[0129] a control unit configured to, if the wind-solar power prediction deviation compensation amount meets the capacity configuration range of the energy storage power station participating in the deviation compensation, perform charge-discharge control on the energy storage power station based on the wind-solar power prediction deviation compensation amount, so as to realize wind-solar power prediction deviation correction.

[0130] In some optional embodiments, the control unit comprises:

[0131] a first control sub-unit configured to, if the wind-solar power prediction deviation compensation amount is positive, take an absolute value of the wind-solar power prediction deviation compensation amount as a discharge power value, and control the energy storage power station to discharge based on the discharge power value, so as to realize wind-solar power prediction deviation correction;

[0132] a second control sub-unit configured to, if the wind-solar power prediction deviation compensation amount is negative, take an absolute value of the wind-solar power prediction deviation compensation amount as a charge power value, and control the energy storage power station to charge based on the charge power value, so as to realize wind-solar power prediction deviation correction.

[0133] In some optional embodiments, the correction module 604 further comprises:

[0134] a correction unit configured to, if the wind-solar power prediction deviation compensation amount does not meet the capacity configuration range of the energy storage power station participating in the deviation compensation, control the energy storage power station to perform wind-solar power prediction deviation correction based on a limit value corresponding to the capacity configuration range of the energy storage power station participating in the deviation compensation.

[0135] Further function descriptions of the above-mentioned various modules and units are the same as those of the above-mentioned corresponding embodiments, and will not be described here again.

[0136] In this embodiment, a wind-solar power prediction deviation correction device for a wind-solar-storage power station is presented in the form of a functional unit. Here, a unit refers to an ASIC (Application Specific Integrated Circuit) circuit, a processor and memory that execute one or more software or fixed programs, and / or other devices that can provide the above functions.

[0137] This invention also provides a computer device having the above-described features. Figure 6 The above describes a wind-solar-storage power prediction deviation correction device for a wind-solar-storage power station.

[0138] Please see Figure 7 , Figure 7 This is a schematic diagram of the structure of a computer device provided in an optional embodiment of the present invention, such as... Figure 7 As shown, the computer device includes one or more processors 10, memory 20, and interfaces for connecting the components, including high-speed interfaces and low-speed interfaces. The components communicate with each other via different buses and can be mounted on a common motherboard or otherwise installed as needed. The processors can process instructions executed within the computer device, including instructions stored in or on memory to display graphical information of a GUI on external input / output devices (such as display devices coupled to the interfaces). In some alternative implementations, multiple processors and / or multiple buses can be used with multiple memories, if desired. Similarly, multiple computer devices can be connected, each providing some of the necessary operations (e.g., as a server array, a group of blade servers, or a multiprocessor system). Figure 7 Take a processor 10 as an example.

[0139] Processor 10 may be a central processing unit, a network processor, or a combination thereof. Processor 10 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The programmable logic device may be a complex programmable logic device (CAMP), a field-programmable gate array (FPGA), a general-purpose array logic (GDA), or any combination thereof.

[0140] The memory 20 stores instructions executable by at least one processor 10 to cause the at least one processor 10 to perform the method shown in the above embodiments.

[0141] The memory 20 can include a program storage area and a data storage area, where the program storage area can store an operating system, application programs required for at least one function, and the data storage area can store data created according to the use of the computer device, etc. In addition, the memory 20 can include a high-speed random access memory, and can also include a non-transitory memory, such as at least one magnetic disk storage device, a flash memory device, or other non-transitory solid-state memory device. In some alternative embodiments, the memory 20 can optionally include a memory disposed remotely from the processor 10, which can be connected to the computer device through a network. Examples of the network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0142] The memory 20 can include a volatile memory, such as a random access memory, and can also include a non-volatile memory, such as a flash memory, a hard disk, or a solid state disk, and can also include a combination of the above-mentioned types of memories.

[0143] The computer device also includes an input device 30 and an output device 40. The processor 10, the memory 20, the input device 30, and the output device 40 can be connected through a bus or other means, Figure 7 The connection through the bus is taken as an example.

[0144] The input device 30 can receive inputted digital or character information, and generate key signal inputs related to the user settings and function controls of the computer device, such as a touch screen, a keypad, a mouse, a trackpad, a touchpad, a pointing stick, one or more mouse buttons, a trackball, a joystick, etc. The output device 40 can include a display device, an auxiliary lighting device (e.g., an LED), a tactile feedback device (e.g., a vibration motor), etc. The display device includes, but is not limited to, a liquid crystal display, a light-emitting diode, a display, and a plasma display. In some alternative embodiments, the display device can be a touch screen.

[0145] The embodiments of the present application further provide a computer readable storage medium, and the method according to the embodiments of the present application can be implemented in hardware, firmware, or recorded in a storage medium, or stored in a remote storage medium or a non-transitory machine readable storage medium and downloaded to a local storage medium through network, so that the method described herein can be processed by such software on a storage medium using a general purpose computer, a special purpose processor, or programmable or special hardware. The storage medium can be a magnetic disk, an optical disk, a read-only memory, a random access memory, a flash memory, a hard disk, or a solid state disk, etc. Further, the storage medium can also include a combination of the above-mentioned memories. It can be understood that the computer, the processor, the microprocessor controller, or the programmable hardware includes a storage component that can store or receive software or computer code, when the software or computer code is accessed and executed by the computer, the processor, or the hardware, the method shown in the above embodiments is implemented.

[0146] Part of the present application can be applied as a computer program product, for example, computer program instructions, when executed by a computer, the operation of the computer can invoke or provide the method and / or technical solutions according to the present application. Those skilled in the art should understand that the form of computer program instructions in computer readable medium includes but is not limited to source file, executable file, installation package file, etc. Correspondingly, the way of computer program instructions executed by computer includes but is not limited to: the computer directly executes the instructions, or the computer compiles the instructions and then executes the corresponding compiled program, or the computer reads and executes the instructions, or the computer reads and installs the instructions and then executes the corresponding installed program. Here, the computer readable medium can be any available computer readable storage medium or communication medium accessible to the computer.

[0147] Although the embodiments of the present application are described in conjunction with the accompanying drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes fall within the scope defined by the appended claims.

Claims

1. A method for correcting wind and solar power prediction deviations in a wind-solar-storage power station, characterized in that, The method includes: Collect grid dispatch instructions, maximum wind and solar power output, short-term combined wind and solar power forecast, and actual power output at grid connection points; The current operating status of the energy storage station is determined based on the maximum available wind and solar power and the grid dispatch instructions. When the current operating state of the energy storage station is free power generation, and there is an error between the short-term power prediction value of the combined wind and solar power and the actual power value generated at the grid connection point, the wind and solar power prediction deviation compensation amount is determined based on the short-term power prediction value of the combined wind and solar power and the actual power value generated at the grid connection point. Based on the aforementioned wind and solar power prediction deviation compensation amount, wind, solar and energy storage power station wind and solar power prediction deviation correction is performed; The determination of the current operating status of the energy storage station based on the maximum renewable power of wind and solar power and the grid dispatch command includes: Obtain the correction coefficients, and calculate the correction factor based on the maximum renewable wind and solar power and the correction coefficients; The power grid dispatch command is compared with the sum of the maximum renewable power of wind and solar power and the correction factor; If the grid dispatch instruction is greater than or equal to the sum of the maximum wind and solar generating power and the correction factor, then the current operating state of the energy storage station will be set to free power generation state.

2. The method according to claim 1, characterized in that, When the current operating state of the energy storage station is free power generation, and there is an error between the combined short-term power forecast of wind and solar power and the actual power generated at the grid connection point, the wind and solar power forecast deviation compensation amount is determined based on the combined short-term power forecast of wind and solar power and the actual power generated at the grid connection point, including: When the current operating state of the energy storage station is free power generation, the energy storage station's participation in prediction deviation compensation is set to prediction deviation compensation standby state. Obtain a preset correction error, and compare the short-term power prediction value of the combined wind and solar power with the sum of the actual power value at the grid connection point and the preset correction error; If the short-term power prediction value of the combined wind and solar power is not equal to the sum of the actual power generated at the grid connection point and the preset correction error, then the wind and solar power prediction deviation compensation amount is calculated based on the short-term power prediction value of the combined wind and solar power and the actual power generated at the grid connection point.

3. The method according to claim 1, characterized in that, The correction of wind and solar power prediction deviation for wind, solar and energy storage power stations based on the wind and solar power prediction deviation compensation amount includes: The capacity configuration range for energy storage power stations to participate in deviation compensation is determined based on the aforementioned short-term power forecast values ​​of the combined wind and solar power. The wind and solar power prediction deviation compensation amount is compared with the capacity configuration range of the energy storage power station participating in the deviation compensation; If the wind and solar power prediction deviation compensation amount is within the capacity configuration range for the energy storage power station to participate in deviation compensation, then the energy storage power station is charged and discharged based on the wind and solar power prediction deviation compensation amount to achieve wind and solar power prediction deviation correction.

4. The method according to claim 3, characterized in that, If the wind and solar power prediction deviation compensation amount is within the capacity configuration range for the energy storage power station to participate in deviation compensation, then the energy storage power station is charged and discharged based on the wind and solar power prediction deviation compensation amount to achieve wind and solar power prediction deviation correction, including: If the wind and solar power prediction deviation compensation amount is positive, then the absolute value of the wind and solar power prediction deviation compensation amount is used as the discharge power value, and the energy storage power station is controlled to discharge based on the discharge power value, so as to realize the correction of wind and solar power prediction deviation. Alternatively, if the wind and solar power prediction deviation compensation amount is negative, the absolute value of the wind and solar power prediction deviation compensation amount is used as the charging power value, and the energy storage station is controlled to charge based on the charging power value, so as to realize the correction of wind and solar power prediction deviation.

5. The method according to claim 4, characterized in that, The method of correcting the wind and solar power prediction deviation of the wind and solar power power storage station based on the wind and solar power prediction deviation compensation amount also includes: If the wind and solar power prediction deviation compensation amount does not match the capacity configuration range of the energy storage power station participating in deviation compensation, then the energy storage power station is controlled to perform wind and solar power prediction deviation correction based on the limit value corresponding to the capacity configuration range of the energy storage power station participating in deviation compensation.

6. A wind-solar-storage power prediction deviation correction device for a wind-solar-storage power station, characterized in that, The device includes: The data acquisition module is used to collect power grid dispatch instructions, maximum wind and solar power generation values, short-term power prediction values ​​for combined wind and solar power generation, and actual power generation values ​​at the grid connection point. The judgment module is used to determine the current operating status of the energy storage station based on the maximum available wind and solar power and the grid dispatch command; The determination module is used to determine the wind and solar power prediction deviation compensation amount based on the wind and solar power prediction deviation and the actual power generation value at the grid connection point when the current operating state of the energy storage station is the free power generation state and there is an error between the wind and solar combined short-term power prediction value and the actual power generation value at the grid connection point. The correction module is used to correct the wind and solar power prediction deviation of the wind and solar power station based on the wind and solar power prediction deviation compensation amount. The judgment module includes: The first calculation unit is used to obtain the correction coefficient and calculate the correction factor based on the maximum renewable power of wind and solar power and the correction coefficient. The first comparison unit is used to compare the grid dispatch command with the sum of the maximum generating power of wind and solar power and the correction factor; The judgment unit is used to set the current operating state of the energy storage station to free generation state if the grid dispatch instruction is greater than or equal to the sum of the maximum generating power of wind and solar power and the correction factor.

7. A computer device, characterized in that, include: The system includes a memory and a processor, which are interconnected. The memory stores computer instructions, and the processor executes the computer instructions to perform the wind and solar power prediction deviation correction method for the wind-solar-storage power station as described in any one of claims 1 to 5.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions for causing the computer to execute the wind and solar power prediction deviation correction method for the wind-solar-storage power station as described in any one of claims 1 to 5.

9. A computer program product, characterized in that, The method includes computer instructions for causing a computer to execute the wind and solar power prediction deviation correction method for the wind, solar and energy storage power station as described in any one of claims 1 to 5.

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