Wind and light power prediction deviation correction method and device for wind and light power storage station

Abstract

The invention relates to the technical field of new energy power generation, and discloses a wind-solar power prediction deviation correction method and device for a wind-solar storage power station, and the method comprises the steps: collecting a power grid dispatching instruction, a wind-solar maximum power value, a wind-solar combined short-term power prediction value, and a grid-connected point actual power value; the current operation state of the energy storage station is judged based on the maximum wind-solar power and the power grid dispatching instruction; when the current operation state of the energy storage station is a free power generation state and an error exists between the wind-solar combined short-term power prediction value and the actual power value of the grid-connected point, determining 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; and performing wind-light power prediction deviation correction on the wind-light power storage station based on the wind-light power prediction deviation compensation amount. The method achieves the correction of the prediction deviation of the wind-solar power, improves the comprehensive benefits of a wind-solar power storage station, and guarantees the safe and reliable operation of a power system.

Description

Technical Field

[0001] The present invention relates to the technical field of renewable energy power generation, and in particular to a method and device for correcting wind-solar power prediction deviation of a wind-solar power storage station. Background Art

[0002] With the rapid increase in installed capacity of new energy, a large number of new energy sources are connected to the power grid. The volatility, randomness and intermittency of new energy sources have brought great challenges to the safe and stable operation of the power grid. Therefore, it is becoming more and more urgent to timely and accurately grasp the status of wind and solar resources. At present, various new energy power stations have set up wind and solar power prediction systems. The wind and solar power prediction system can generate ultra-short-term and short-term power prediction results of wind and solar resources through external meteorological data and model training.

[0003] Since the wind and solar power prediction system is affected by multiple factors such as the quality of external meteorological data, prediction model, geographical location, and climatic conditions, the accuracy of its power prediction varies. The stable operation of the power system requires real-time balance between source and load. With the continuous increase in wind and solar power installations, the prediction error of wind and solar power further widens the gap between source and load balance, which in turn affects the safe and reliable operation of the power system. Summary of the invention

[0004] In view of this, the present invention provides a method and device for correcting wind-solar power prediction deviation of a wind-solar power storage station to solve the problem that the prediction error of the wind-solar power prediction system is large, affecting the safe and reliable operation of the power system.

[0005] In a first aspect, the present invention provides a method for correcting wind-solar power prediction deviation of a wind-solar power storage station, the method comprising:

[0006] Collect grid dispatch instructions, maximum wind and solar power generation values, wind and solar power combined short-term power forecast values, and actual power generation values ​​at the grid connection point;

[0007] Determine the current operating status of the energy storage station based on the maximum power that can be generated by wind and solar power and the grid dispatch instructions;

[0008] 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 forecast value and the actual power value of the grid connection point, the wind-solar power forecast deviation compensation amount is determined based on the wind-solar combined short-term power forecast value and the actual power value of the grid connection point;

[0009] The wind-solar-power-storage power station is corrected for the wind-solar-power-storage power station based on the wind-solar-power-storage power forecast deviation compensation amount.

[0010] The present embodiment provides a method for correcting wind-solar power prediction deviation of a wind-solar-energy storage power station. The method determines the current operating state of the energy storage station by using the maximum wind-solar power and the grid dispatching instructions, and then determines the wind-solar power prediction deviation compensation amount 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 value of the grid connection point. The wind-solar power prediction deviation compensation amount is used to correct the wind-solar power prediction deviation of the wind-solar-energy storage power station, thereby correcting the wind-solar power prediction deviation and avoiding the assessment of the wind-solar-energy storage power station caused by the wind-solar power prediction deviation, thereby improving the comprehensive benefits of the wind-solar-energy storage power station and ensuring the safe and reliable operation of the power system.

[0011] In an optional implementation, judging the current operating state of the energy storage station based on the maximum power that can be generated by wind and solar power and the grid dispatching instruction includes:

[0012] Obtain the correction coefficient and calculate the correction factor based on the maximum wind and solar power generation power and the correction coefficient;

[0013] Compare the grid dispatching instruction with the sum of the maximum power that can be generated by wind and solar power and the correction factor;

[0014] If the grid dispatch instruction is greater than / equal to the sum of the maximum power that can be generated by wind and solar power and the correction factor, the current operating state of the energy storage station will be set to free power generation state.

[0015] The present embodiment provides a method for correcting wind-solar power prediction deviations of a wind-solar-energy storage power station, which determines the current operating status of the energy storage station through grid dispatching instructions and the maximum wind-solar power that can be generated, thereby achieving accurate judgment of the current operating status of the energy storage station, and introducing a correction factor to make the judgment of the current operating status of the energy storage station more accurate, laying the foundation for subsequent wind-solar power prediction deviation compensation control.

[0016] In an optional implementation, 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 combined short-term power forecast value and the actual power value of the grid connection point, the wind-solar power forecast deviation compensation amount is determined based on the wind-solar combined short-term power forecast value and the actual power value of the grid connection point, including:

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

[0018] Obtain a preset correction error, and compare the wind-solar combined short-term power forecast value with the actual power value of the grid-connected point and the sum of the preset correction error;

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

[0020] The present embodiment provides a method for correcting the deviation of wind-solar power prediction of a wind-solar-energy storage power station. When the two judgment conditions are met, that is, the operating state of the energy storage station is in a free power generation state, and 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, it can be determined whether there is a deviation in the wind-solar power prediction, thereby achieving accurate judgment of the wind-solar power prediction deviation and making the wind-solar power prediction deviation compensation amount more in line with the maximization of the benefits of the wind-solar-energy storage power station, achieving the grid-connected point power tracking of the wind-solar combined short-term power prediction result, and providing key support for the power grid.

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

[0022] Determine the capacity configuration range of the energy storage power station participating in deviation compensation based on the short-term power forecast value of wind and solar power combined;

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

[0024] If the wind and solar power forecast deviation compensation amount is within the capacity configuration range of the energy storage power station participating in the deviation compensation, the energy storage power station is charged and discharged based on the wind and solar power forecast deviation compensation amount to achieve wind and solar power forecast deviation correction.

[0025] This embodiment provides a method for correcting wind-solar power forecast deviations of a wind-solar-storage power station, which determines the capacity configuration range of the energy storage power station participating in the deviation compensation based on the wind-solar combined short-term power forecast value. In the process of correcting wind-solar power forecast deviations, the scientific and reasonable use of the energy storage capacity is achieved, the normal operation of the energy storage power station is guaranteed, and the comprehensive benefits of the wind-solar-storage power station are improved.

[0026] In an optional implementation, 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, the energy storage power station is charged and discharged based on the wind-solar power prediction deviation compensation amount to achieve wind-solar power prediction deviation correction, including:

[0027] If the wind-solar power forecast deviation compensation amount is a positive value, the absolute value of the wind-solar power forecast 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 to achieve wind-solar power forecast deviation correction;

[0028] Alternatively, if the wind-solar power prediction deviation compensation amount is a negative value, the absolute value of the wind-solar power prediction deviation compensation amount is used as the charging power value, and the energy storage power station is controlled to charge based on the charging power value to achieve wind-solar power prediction deviation correction.

[0029] The present embodiment provides a method for correcting wind-solar power prediction deviations of a wind-solar power storage power station. By judging whether the wind-solar power prediction deviation compensation amount is a positive value or a negative value, the discharge state or charging state of the energy storage power station is determined, thereby achieving reasonable control of the energy storage power station and effective correction of the wind-solar power prediction deviations of the wind-solar power storage power station.

[0030] In an optional implementation, the wind-solar power prediction deviation correction of the wind-solar power storage power station is performed based on the wind-solar power prediction deviation compensation amount, further comprising:

[0031] If the wind and solar power forecast deviation compensation amount does not match 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 and solar power forecast deviation based on the limit value corresponding to the capacity configuration range of the energy storage power station participating in the deviation compensation.

[0032] In a second aspect, the present invention provides a wind-solar power prediction deviation correction device for a wind-solar power storage station, the device comprising:

[0033] The acquisition module is used to collect grid dispatching instructions, the maximum power that can be generated by wind and solar, the short-term power forecast value of wind and solar combined, and the actual power value of the grid connection point;

[0034] A judgment module is used to judge the current operating status of the energy storage station based on the maximum power that can be generated by wind and solar power and the grid dispatching instructions;

[0035] A determination module is used to determine the wind-solar power prediction deviation compensation amount based on the wind-solar power prediction value and the grid-connected point actual power value 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 combined short-term power prediction value and the grid-connected point actual power value;

[0036] The correction module is used to correct the wind and solar power prediction deviation of the wind, solar and energy storage power station based on the wind and solar power prediction deviation compensation amount.

[0037] In a third aspect, the present invention provides a computer device, comprising: a memory and a processor, the memory and the processor being communicatively connected to each other, the memory storing computer instructions, and the processor executing the computer instructions to execute the method for correcting wind and solar power prediction deviations of a wind, solar and energy storage power station according to the first aspect or any corresponding embodiment thereof.

[0038] In a fourth aspect, the present invention provides a computer-readable storage medium having computer instructions stored thereon, the computer instructions being used to enable a computer to execute the method for correcting wind and solar power prediction deviations of a wind, solar and energy storage power station according to the first aspect or any corresponding embodiment thereof.

[0039] In a fifth aspect, the present invention provides a computer program product, comprising computer instructions, the computer instructions being used to enable a computer to execute the method for correcting wind-solar power prediction deviations of a wind-solar-storage power station according to the first aspect or any corresponding embodiment thereof. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

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

[0042] Figure 2 It is a flow chart of a method for correcting wind-solar power prediction deviation of a wind-solar-storage power station according to an embodiment of the present invention;

[0043] Figure 3 It is a flow chart of another method for correcting wind-solar power prediction deviation of a wind-solar-storage power station according to an embodiment of the present invention;

[0044] Figure 4 It is a flow chart of another method for correcting wind-solar power prediction deviation of a wind-solar-storage power station according to an embodiment of the present invention;

[0045] Figure 5 It is a flow chart of another method for correcting wind-solar power prediction deviation of a wind-solar-storage power station according to an embodiment of the present invention;

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

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

[0048] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0049] like Figure 1 As shown, the wind, solar and storage integrated power station consists of a power deviation compensation device, a wind, solar and storage coordination controller, a wind power prediction device, a photovoltaic power prediction device, a grid-connected point power collection device, a wind power energy management platform, a photovoltaic energy management platform and a storage energy management platform.

[0050] The embodiment of the present invention provides a method for correcting the wind-solar power prediction deviation of a wind-solar-storage power station. It should be noted that the embodiment of the present invention provides a method for correcting the wind-solar power prediction deviation of a wind-solar-storage power station, and its execution subject can be a power deviation compensation device in a wind-solar-storage integrated power station. The power deviation compensation device can be implemented as part or all of an electronic device through software, hardware, or a combination of software and hardware. The electronic device can be a server or a terminal. The server in the embodiment of the present application can be a single 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, an intelligent robot, and other intelligent hardware devices. In the following method embodiments, the execution subject is an electronic device as an example for explanation.

[0051] According to an embodiment of the present invention, an embodiment of a method for correcting wind and solar power prediction deviations of a wind, solar and energy storage power station is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0052] In this embodiment, a method for correcting wind-solar power prediction deviation of a wind-solar power station is provided, which can be used for the above-mentioned power deviation compensation device. Figure 2 is a flow chart of a method for correcting wind-solar power prediction deviation of a wind-solar power station according to an embodiment of the present invention. Figure 2 As shown, the process includes the following steps:

[0053] Step S201, collecting grid dispatch instructions, maximum wind and solar power generation values, wind and solar power combined short-term power forecast values ​​and actual power generation values ​​at the grid connection point.

[0054] Specifically, the wind power prediction device and the photovoltaic power prediction device predict the 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 them to the power grid dispatching center; the power grid dispatching center is responsible for generating the power station dispatching curve according to the wind and solar power forecast and load forecast results and sending it to the power station for execution; the wind, solar and storage coordination controller is responsible for receiving the grid dispatching instructions and distributing them 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 dispatching instructions issued by the wind, solar and storage coordination controller and feeding back the maximum power that can be generated by wind and solar to the power deviation compensation device; the power deviation compensation device collects the actual power value of the grid connection point, the grid dispatching instructions, the maximum power that can be generated by wind and solar, and the combined short-term power forecast value of wind and solar, starts the energy storage to participate in the forecast deviation compensation according to logical judgment, and sends the power value to be compensated to the wind, solar and storage coordination controller; when the wind, solar and storage coordination controller receives the energy storage instruction issued by the power deviation compensation device, it directly sends the instruction to the energy storage energy management platform for execution.

[0055] Step S202, judging the current operating status of the energy storage station based on the maximum power that can be generated by wind and solar power and the grid dispatching instructions.

[0056] Step S203: 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 forecast value and the actual power value of the grid connection point, the wind-solar power forecast deviation compensation amount is determined based on the wind-solar combined short-term power forecast value and the actual power value of the grid connection point.

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

[0058] The present embodiment provides a method for correcting wind-solar power prediction deviation of a wind-solar-energy storage power station. The method determines the current operating state of the energy storage station by using the maximum wind-solar power and the grid dispatching instructions, and then determines the wind-solar power prediction deviation compensation amount 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 value of the grid connection point. The wind-solar power prediction deviation compensation amount is used to correct the wind-solar power prediction deviation of the wind-solar-energy storage power station, thereby correcting the wind-solar power prediction deviation and avoiding the assessment of the wind-solar-energy storage power station caused by the wind-solar power prediction deviation, thereby improving the comprehensive benefits of the wind-solar-energy storage power station and ensuring the safe and reliable operation of the power system.

[0059] In this embodiment, a method for correcting wind-solar power prediction deviation of a wind-solar power station is provided, which can be used for the above-mentioned power deviation compensation device. Figure 3 is a flow chart of a method for correcting wind-solar power prediction deviation of a wind-solar power station according to an embodiment of the present invention. Figure 3 As shown, the process includes the following steps:

[0060] Step S301, collect the grid dispatching instructions, the maximum power value of wind and solar power, the wind and solar power combined short-term power forecast value and the actual power value of the grid connection point. Figure 2 Step S201 of the illustrated embodiment will not be described in detail here.

[0061] Step S302, judging the current operating status of the energy storage station based on the maximum power that can be generated by wind and solar power and the grid dispatching instructions.

[0062] Specifically, the above step S302 includes:

[0063] Step S3021, obtain the correction coefficient, and calculate the correction factor based on the maximum wind and solar power that can be generated and the correction coefficient.

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

[0065] P0=k×(P2+P3) (1)

[0066] Among them, k represents the correction coefficient, which can be determined according to the rules of the dispatching center to which the power station belongs, P2 represents the maximum power that can be generated by wind power, and P3 represents the maximum power that can be generated by photovoltaic power.

[0067] Step S3022, comparing the grid dispatch instruction with the sum of the maximum wind and solar power generation capacity and the correction factor.

[0068] Step S3023: If the grid dispatch instruction is greater than / equal to the sum of the maximum wind and solar power generation capacity and the correction factor, the current operating state of the energy storage station is set to a free power generation state.

[0069] Specifically, when the grid dispatch 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] Furthermore, 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] Furthermore, if the grid dispatch instruction P does not satisfy the above formula (2), the energy storage power station exits the forecast deviation compensation standby state and sets the state word w of the energy storage power station participating in the forecast deviation compensation to 0.

[0073] 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 combined short-term power forecast value and the actual power value of the grid connection point, the wind-solar power forecast deviation compensation amount is determined based on the wind-solar combined short-term power forecast value and the actual power value of the grid connection point. Figure 2 Step S203 of the illustrated embodiment will not be described in detail here.

[0074] Step S304: Correct the wind-solar power forecast deviation of the wind-solar power storage power station based on the wind-solar power forecast deviation compensation amount. Figure 2 Step S204 of the illustrated embodiment will not be described in detail here.

[0075] The present embodiment provides a method for correcting wind-solar power prediction deviations of a wind-solar-energy storage power station, which determines the current operating status of the energy storage station through grid dispatching instructions and the maximum wind-solar power that can be generated, thereby achieving accurate judgment of the current operating status of the energy storage station, and introducing a correction factor to make the judgment of the current operating status of the energy storage station more accurate, laying the foundation for subsequent wind-solar power prediction deviation compensation control.

[0076] In this embodiment, a method for correcting wind-solar power prediction deviation of a wind-solar power station is provided, which can be used for the above-mentioned power deviation compensation device. Figure 4 is a flow chart of a method for correcting wind-solar power prediction deviation of a wind-solar power station according to an embodiment of the present invention. Figure 4 As shown, the process includes the following steps:

[0077] Step S401, collect the grid dispatching instructions, the maximum power value of wind and solar power, the wind and solar power combined short-term power forecast value and the actual power value of the grid connection point. Figure 3 Step S301 of the illustrated embodiment will not be described in detail here.

[0078] Step S402: Determine the current operating status of the energy storage station based on the maximum power that can be generated by wind and solar power and the grid dispatching instructions. Figure 3 .Step S302 of the illustrated embodiment will not be described in detail here.

[0079] Step S403: 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 forecast value and the actual power value of the grid connection point, the wind-solar power forecast deviation compensation amount is determined based on the wind-solar combined short-term power forecast value and the actual power value of the grid connection point.

[0080] Specifically, the above step S403 includes:

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

[0082] Step S4032, obtaining a preset correction error, and comparing the wind-solar combined short-term power forecast value with the sum of the actual power value of the grid-connected point and the preset correction error.

[0083] Step S4033: If the wind-solar combined short-term power forecast value is not equal to the sum of the actual power value of the grid-connected point and the preset correction error, the wind-solar power forecast deviation compensation amount is calculated based on the wind-solar combined short-term power forecast value and the actual power value of the grid-connected point.

[0084] Specifically, when w=1, the energy storage power station enters the forecast deviation compensation standby state. At this time, the following judgment formula is used to determine whether there is an error between the wind-solar combined short-term power forecast value and the actual power value at the grid connection point:

[0085] P4≠P1+△P (3)

[0086] Among them, P4 represents the short-term power forecast value of the combined wind and solar power, 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 operating data of the wind, solar and energy storage power station.

[0087] Furthermore, if the wind-solar combined short-term power forecast value and the grid-connected point actual power value meet the above judgment formula (3), there is an error between the wind-solar combined short-term power forecast value and the grid-connected point actual power value, and deviation correction is required.

[0088] Furthermore, when P4=P1+△P, the energy storage instruction is assigned a value of 0. At this time, there is no error between the short-term power forecast value of the wind-solar combination and the actual power value of the grid-connected point.

[0089] Furthermore, the calculation formula of the wind and solar power prediction deviation compensation amount P5 is as follows:

[0090] P5=P4-P1 (4)

[0091] Step S404: Correct the wind-solar power forecast deviation of the wind-solar power storage power station based on the wind-solar power forecast deviation compensation amount. Figure 3 Step S304 of the illustrated embodiment will not be described in detail here.

[0092] The present embodiment provides a method for correcting the deviation of wind-solar power prediction of a wind-solar-energy storage power station. When the two judgment conditions are met, that is, the operating state of the energy storage station is in a free power generation state, and 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, it can be determined whether there is a deviation in the wind-solar power prediction, thereby achieving accurate judgment of the wind-solar power prediction deviation and making the wind-solar power prediction deviation compensation amount more in line with the maximization of the benefits of the wind-solar-energy storage power station, achieving the grid-connected point power tracking of the wind-solar combined short-term power prediction result, and providing key support for the power grid.

[0093] In this embodiment, a method for correcting wind-solar power prediction deviation of a wind-solar power station is provided, which can be used for the above-mentioned power deviation compensation device. Figure 5is a flow chart of a method for correcting wind-solar power prediction deviation of a wind-solar power station according to an embodiment of the present invention. Figure 5 As shown, the process includes the following steps:

[0094] Step S501, collect the grid dispatching instructions, the maximum power value of wind and solar power, the wind and solar power combined short-term power forecast value and the actual power value of the grid connection point. Figure 4 Step S401 of the illustrated embodiment will not be described in detail here.

[0095] Step S502: Determine the current operating status of the energy storage station based on the maximum power that can be generated by wind and solar power and the grid dispatching instructions. Figure 4 Step S402 of the illustrated embodiment will not be described in detail here.

[0096] 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 combined short-term power forecast value and the actual power value of the grid connection point, the wind-solar power forecast deviation compensation amount is determined based on the wind-solar combined short-term power forecast value and the actual power value of the grid connection point. Figure 4 Step S403 of the illustrated embodiment will not be described in detail here.

[0097] Step S504, correcting the wind-solar-power prediction deviation of the wind-solar-power-storage power station based on the wind-solar-power prediction deviation compensation amount.

[0098] Specifically, the above step S504 includes:

[0099] Step S5041, determining the capacity configuration range of the energy storage power station participating in deviation compensation based on the wind-solar combined short-term power forecast value.

[0100] Specifically, a wind-solar combined short-term power forecast value of no less than 80% is selected as the reference value, and the energy storage configuration capacity should be able to cover the deviation of wind-solar power by ±20%. Taking into account that the usage boundary of electrochemical energy storage is 5% to 95% of its own capacity, the energy storage configuration ratio should not be less than 46% of the wind-solar installed capacity (23%×2), and the capacity configuration range of the energy storage power station participating in the deviation compensation is determined to be (-23%, +23%).

[0101] Step S5042: compare the wind / solar power forecast deviation compensation amount with the capacity configuration range of the energy storage power station participating in the deviation compensation.

[0102] Step S5043: 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, the energy storage power station is charged and discharged based on the wind-solar power prediction deviation compensation amount to achieve wind-solar power prediction deviation correction.

[0103] Specifically, if the wind / solar power forecast deviation compensation amount does not match 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 forecast deviation based on the limit value corresponding to the capacity configuration range of the energy storage power station participating in the deviation compensation.

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

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

[0106] Step a1: If the wind-solar power prediction deviation compensation amount is a positive value, the absolute value of the wind-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 to achieve wind-solar power prediction deviation correction.

[0107] Specifically, if P5 is a positive value, 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 and solar power prediction deviation compensation amount.

[0108] Step a2, or, if the wind-solar power prediction deviation compensation amount is a negative value, the absolute value of the wind-solar power prediction deviation compensation amount is used as the charging power value, and the energy storage power station is controlled to charge based on the charging power value to realize the wind-solar power prediction deviation correction.

[0109] Specifically, if P5 is a negative value, 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 and solar power prediction deviation compensation amount.

[0110] Furthermore, the discharge power value or charging power value is sent to the wind-solar-storage coordination controller, which sends energy storage instructions to the energy storage energy management platform. The energy storage energy management platform performs charging and discharging control according to the energy storage instructions, so that the power of the grid-connected point follows the short-term forecast results of wind and solar.

[0111] This embodiment provides a method for correcting wind-solar power forecast deviations of a wind-solar-storage power station, which determines the capacity configuration range of the energy storage power station participating in the deviation compensation based on the wind-solar combined short-term power forecast value. In the process of correcting wind-solar power forecast deviations, the scientific and reasonable use of the energy storage capacity is achieved, the normal operation of the energy storage power station is guaranteed, and the comprehensive benefits of the wind-solar-storage power station are improved.

[0112] In this embodiment, a wind-solar power prediction deviation correction device for a wind-solar-storage power station is also provided, which is used to implement the above-mentioned embodiments and preferred implementation modes, and will not be repeated hereafter. As used below, the term "module" can be a combination of software and / or hardware that implements a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceivable.

[0113] This embodiment provides a wind-solar power prediction deviation correction device for a wind-solar power storage station, such as Figure 6 As shown, including:

[0114] The acquisition module 601 is used to collect the grid dispatching instructions, the maximum power value of wind and solar power, the wind and solar power combined short-term power forecast value and the actual power value of the grid connection point;

[0115] The judgment module 602 is used to judge the current operation status of the energy storage station based on the maximum power that can be generated by wind and solar power and the grid dispatching instruction;

[0116] Determination module 603, used for determining the wind-solar power prediction deviation compensation amount based on the wind-solar power prediction value and the grid-connected point actual power value 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 grid-connected point actual power value;

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

[0118] In some optional implementations, the determination module 602 includes:

[0119] A first calculation unit is used to obtain a correction coefficient and calculate a correction factor based on the maximum wind and solar power generation power and the correction coefficient;

[0120] A first comparison unit is used to compare the grid dispatch instruction with the sum of the maximum wind and solar power generation power and the correction factor;

[0121] The judgment unit is used to set the current operating state of the energy storage station to a free power generation state if the grid dispatch instruction is greater than / equal to the sum of the maximum power that can be generated by wind and solar power and the correction factor.

[0122] In some optional implementations, the determining module 603 includes:

[0123] A setting unit, used for setting the state of the energy storage station participating in the prediction deviation compensation to the prediction deviation compensation standby state when the current operation state of the energy storage station is the free power generation state;

[0124] The second comparison unit is used to obtain a preset correction error and compare the wind-solar combined short-term power forecast value with the sum of the actual power value of the grid connection point and the preset correction error;

[0125] The second calculation unit is used to calculate the 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 connection point if the wind-solar combined short-term power prediction value is not equal to the sum of the actual power value of the grid connection point and the preset correction error.

[0126] In some optional implementations, the correction module 604 includes:

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

[0128] A third comparison unit is used to compare the wind and solar power prediction deviation compensation amount with the capacity configuration range of the energy storage power station participating in the deviation compensation;

[0129] The control unit is used to control the charging and discharging of the energy storage power station based on the wind and solar power prediction deviation compensation amount if the wind and solar power prediction deviation compensation amount meets the capacity configuration range of the energy storage power station participating in the deviation compensation, so as to realize the correction of the wind and solar power prediction deviation.

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

[0131] The first control subunit is used for, if the wind-solar power prediction deviation compensation amount is a positive value, using the absolute value of the wind-solar power prediction deviation compensation amount as the discharge power value, and controlling the energy storage power station to discharge based on the discharge power value, so as to realize the wind-solar power prediction deviation correction;

[0132] The second control subunit is used to use the absolute value of the wind-solar power prediction deviation compensation amount as the charging power value if the wind-solar power prediction deviation compensation amount is a negative value, and control the energy storage power station to charge based on the charging power value to realize the wind-solar power prediction deviation correction.

[0133] In some optional implementations, the correction module 604 further includes:

[0134] The correction unit is used to control the energy storage power station to correct the wind and 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 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 the deviation compensation.

[0135] The further functional description of each of the above modules and units is the same as that of the above corresponding embodiments and will not be repeated here.

[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, where the unit refers to an ASIC (Application Specific Integrated Circuit) circuit, a processor and memory that executes one or more software or fixed programs, and / or other devices that can provide the above functions.

[0137] The embodiment of the present invention also provides a computer device having the above Figure 6 A wind-solar power prediction deviation correction device for a wind-solar power storage station is shown.

[0138] See also Figure 7 , Figure 7 is a schematic diagram of the structure of a computer device provided by an optional embodiment of the present invention, such as Figure 7 As shown, the computer device includes: one or more processors 10, a memory 20, and interfaces for connecting various components, including high-speed interfaces and low-speed interfaces. Various components are connected to each other using different buses for communication, and can be installed on a common mainboard or installed in other ways as needed. The processor can process instructions executed in the computer device, including instructions stored in or on the memory to display the graphical information of the GUI on an external input / output device (such as a display device coupled to the interface). In some optional embodiments, if necessary, multiple processors and / or multiple buses can be used together with multiple memories. Similarly, multiple computer devices can be connected, and each device provides some necessary operations (for example, as a server array, a group of blade servers, or a multi-processor system). Figure 7 A processor 10 is taken as an example.

[0139] The processor 10 may be a central processing unit, a network processor or a combination thereof. The processor 10 may further include a hardware chip. The hardware chip may be a dedicated integrated circuit, a programmable logic device or a combination thereof. The programmable logic device may be a complex programmable logic device, a field programmable gate array, a general purpose array logic or any combination thereof.

[0140] The memory 20 stores instructions executable by at least one processor 10, so that the at least one processor 10 executes the method shown in the above embodiment.

[0141] The memory 20 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function; the data storage area may store data created according to the use of the computer device, etc. In addition, the memory 20 may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device. In some optional embodiments, the memory 20 may optionally include a memory remotely arranged relative to the processor 10, and these remote memories may be connected to the computer device via a network. Examples of the above-mentioned 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 may include a volatile memory, such as a random access memory; the memory may also include a non-volatile memory, such as a flash memory, a hard disk or a solid state drive; the memory 20 may also include a combination of the above types of memory.

[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 may be connected via a bus or other means. Figure 7 The example of connecting through bus is taken in the following.

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

[0145] The embodiment of the present invention also provides a computer-readable storage medium. The method according to the embodiment of the present invention can be implemented in hardware, firmware, or can be implemented as a computer code that can be recorded in a storage medium, or can be implemented as a computer code that is originally stored in a remote storage medium or a non-temporary machine-readable storage medium and will be stored in a local storage medium through a network download, so that the method described herein can be stored in such software processing on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. Among them, the storage medium can be a magnetic disk, an optical disk, a read-only storage memory, a random access memory, a flash memory, a hard disk or a solid-state hard disk, etc.; further, the storage medium can also include a combination of the above types of memories. It can be understood that a computer, a processor, a microprocessor controller, or 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 a computer, a processor, or hardware, the method shown in the above embodiment is implemented.

[0146] A part of the present invention may be applied as a computer program product, such as a computer program instruction, which, when executed by a computer, can call or provide the method and / or technical solution according to the present invention through the operation of the computer. Those skilled in the art should understand that the existence of the computer program instruction in a computer-readable medium includes, but is not limited to, a source file, an executable file, an installation package file, etc., and accordingly, the way in which the computer program instruction is executed by the computer includes, but is not limited to: the computer directly executes the instruction, or the computer compiles the instruction and then executes the corresponding compiled program, or the computer reads and executes the instruction, or the computer reads and installs the instruction and then executes the corresponding installed program. Here, the computer-readable medium may be any available computer-readable storage medium or communication medium accessible to the computer.

[0147] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A method for correcting wind-solar power prediction deviation of a wind-solar power storage station, characterized in that: The method comprises: Collect grid dispatch instructions, maximum wind and solar power generation values, wind and solar power combined short-term power forecast values, and actual power generation values ​​at the grid connection point; Determine the current operating status of the energy storage station based on the maximum wind and solar power generation power and the grid dispatching instruction; 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 combined short-term power forecast value and the actual power value of the grid connection point, the wind-solar power forecast deviation compensation amount is determined based on the wind-solar combined short-term power forecast value and the actual power value of the grid connection point; The wind-solar-power prediction deviation of the wind-solar-power storage power station is corrected based on the wind-solar-power prediction deviation compensation amount.

2. The method according to claim 1, characterized in that The determining the current operating state of the energy storage station based on the maximum wind and solar power generation power and the grid dispatching instruction includes: Obtaining a correction coefficient, and calculating a correction factor based on the maximum wind and solar power generation power and the correction coefficient; Compare the grid dispatch instruction with the sum of the maximum wind and solar power generation power and the correction factor; If the grid dispatch instruction is greater than / equal to the sum of the maximum wind and solar power generation power and the correction factor, the current operating state of the energy storage station is set to a free power generation state.

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

4. The method according to claim 1, characterized in that: The method of correcting the wind-solar power prediction deviation of the wind-solar power storage power station based on the wind-solar power prediction deviation compensation amount includes: Determine the capacity configuration range of the energy storage power station participating in the deviation compensation based on the wind-solar combined short-term power forecast value; Compare the wind and solar power forecast deviation compensation amount with the capacity configuration range of the energy storage power station participating in the deviation compensation; If the wind-solar power forecast deviation compensation amount is in line with the capacity configuration range of the energy storage power station participating in the deviation compensation, the energy storage power station is charged and discharged based on the wind-solar power forecast deviation compensation amount to achieve wind-solar power forecast deviation correction.

5. The method according to claim 4, characterized in that 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, the energy storage power station is charged and discharged based on the wind-solar power prediction deviation compensation amount to achieve wind-solar power prediction deviation correction, including: If the wind-solar power prediction deviation compensation amount is a positive value, the absolute value of the wind-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 to achieve wind-solar power prediction deviation correction; Alternatively, if the wind / solar power prediction deviation compensation amount is a negative value, the absolute value of the wind / solar power prediction deviation compensation amount is used as the charging power value, and the energy storage power station is controlled to charge based on the charging power value to achieve wind / solar power prediction deviation correction.

6. The method according to claim 5, characterized in that The correcting of the wind-solar power prediction deviation of the wind-solar power storage power station based on the wind-solar power prediction deviation compensation amount also includes: If the wind / solar power forecast deviation compensation amount does not match 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 forecast deviation based on the limit value corresponding to the capacity configuration range of the energy storage power station participating in the deviation compensation.

7. A wind-solar power prediction deviation correction device for a wind-solar power storage station, characterized in that: The device comprises: The acquisition module is used to collect grid dispatching instructions, the maximum power that can be generated by wind and solar, the short-term power forecast value of wind and solar combined, and the actual power value of the grid connection point; A judgment module, used to judge the current operating state of the energy storage station based on the maximum wind and solar power generation power and the grid dispatching instruction; A determination module, used for determining the wind-solar power prediction deviation compensation amount based on the wind-solar power prediction value and the grid-connected point actual power value 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 combined short-term power prediction value and the grid-connected point actual power value; A correction module is used to correct the wind-solar power prediction deviation of the wind-solar power storage power station based on the wind-solar power prediction deviation compensation amount.

8. A computer device, characterized in that: include: A memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the wind / solar power prediction deviation correction method of a wind / solar / storage power station according to any one of claims 1 to 6 by executing the computer instructions.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a computer to execute the method for correcting wind-solar power prediction deviations of a wind-solar-storage power station according to any one of claims 1 to 6.

10. A computer program product, characterized in that It comprises computer instructions, and the computer instructions are used to enable a computer to execute the wind-solar power prediction deviation correction method of a wind-solar-storage power station according to any one of claims 1 to 6.

Images