A method, device, medium and product for real-time control of active power in a wind-solar combined power station

Abstract

The present invention discloses a real-time active power control method, device, medium, and product for a wind-solar combined power station, relating to the technical field of wind power generation. The method comprises: obtaining real-time relevant data of the wind-solar combined power station; calculating the wind power output fluctuation rate at the current moment based on the real-time relevant data of the wind-solar combined power station; when the absolute value of the wind power output fluctuation rate at the current moment is greater than a set fluctuation rate limit, calculating a first output value; calculating a second output value based on the first output value; when the absolute value of the wind power output fluctuation rate at the current moment is less than or equal to the set fluctuation rate limit, calculating a first deviation and a second deviation; when the first deviation is less than or equal to the second deviation, calculating the wind turbine power generation instruction value assigned by the wind-solar combined power station at the current moment; and when the first deviation is greater than the second deviation, calculating the first instruction value assigned by the wind-solar combined power station to photovoltaic power generation at the current moment. The present invention can ensure the power quality of wind power connected to the power grid.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, and in particular to a method, equipment, medium and product for real-time control of active power in a wind-solar combined power station. Background Art

[0002] In recent years, the National Energy Administration has continued to improve the absorption of new energy, continuously enhance the regulation capacity of the power system, expand the market-based trading volume of new energy, and promote the rapid development and efficient utilization of new energy. In the past two years, the development of new energy has further accelerated, with wind power generation and photovoltaic power generation technologies gradually developing, and the installed capacity of both increasing year by year. To adapt to the rapid growth of new energy and ensure the high-quality development of new energy, large-scale development of new energy power generation resources will be carried out, and wind and solar power stations with good grid-connected characteristics will be built. High-quality absorption will promote the construction of a new energy supply and absorption system. However, the current situation is that due to the volatility of wind power output and the random characteristics of wind power, the short-term power fluctuations it produces may affect the reliability and power quality of the power grid, and have an adverse impact on the stable operation of the power grid.

[0003] As wind power technology matures and grid-connected capacity continues to increase, wind turbine power generation primarily depends on wind speed. This constant variability, influenced by uncontrollable factors like geography and weather, causes wind power output to fluctuate dramatically and be difficult to accurately predict. This can impact the stable and safe operation of the power system when wind power is connected to the grid. To ensure the quality of power generated when wind power is connected, countries are limiting wind turbine installed capacity to mitigate the impact of wind power fluctuations on grid stability. However, this increases wind curtailment and significantly reduces wind energy utilization. Currently, approaches to smoothing wind power fluctuations primarily involve controlling wind power output using wind turbine characteristics and configuring output power using energy storage devices. However, these approaches do not effectively overcome the randomness of wind power generation, nor do they guarantee the quality of power generated when wind power is connected to the grid. Summary of the Invention

[0004] The purpose of the present invention is to provide a real-time control method, equipment, medium and product for active power of a wind-solar combined power station, which can control the real-time photovoltaic output process according to the current wind power output, so that the wind power can achieve smooth output and stably track the planned output, thereby ensuring the power quality of the wind power connected to the power grid.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] In a first aspect, the present invention provides a method for real-time control of active power in a wind-solar combined power station, the method comprising:

[0007] Acquire real-time relevant data of the wind-solar combined power station; the real-time relevant data of the wind-solar combined power station include: the total actual power generated by the wind-solar combined power station at the previous moment, the actual active power generated by wind power at the current moment, the actual active power generated by photovoltaic power at the current moment, the rated installed capacity of the wind farm, the rated installed capacity of the photovoltaic power generation system, the ideal output value of the entire wind-solar combined power station at the previous moment under the condition of smoothing the fluctuation of wind power, the maximum power that can be generated by the wind turbine at the current moment, the maximum power that can be generated by photovoltaic power at the current moment, the minimum power that can be generated by photovoltaic power at the current moment, the power generation instruction value assigned to the wind turbine by the wind-solar combined power station at the previous moment, the deviation between the instruction value issued by the dispatching side at the previous moment and the actual active power generated by wind power, the instruction value assigned to photovoltaic power generation by the wind-solar combined power station at the previous moment, the deviation between the instruction value issued by the dispatching side at the previous moment and the maximum power that can be generated by the wind turbine, and the instruction value issued by the dispatching side at the current moment.

[0008] The wind power output fluctuation rate at the current moment is calculated based on the real-time relevant data of the wind-solar combined power station.

[0009] When the absolute value of the wind power output fluctuation rate at the current moment is greater than the set fluctuation rate limit, the first output value is calculated; the fluctuation rate limit is a value set according to local actual conditions or according to grid demand; the first output value is the ideal output value of the entire wind-solar combined power station in the wind power fluctuation smoothing mode at the current moment; the first output value is the product of the fluctuation rate limit and the ideal output value of the entire wind-solar combined power station in the wind power fluctuation smoothing mode at the previous moment.

[0010] Based on the first output value, the second output value is calculated; the second output value is the output value of the photovoltaic power generation system at the current moment under the smoothing of wind power fluctuations; the second output value is the absolute value of the difference between the ideal output value of the entire wind-solar combined power station at the current moment in the wind power fluctuation smoothing mode and the total actual power generated by the wind-solar combined power station at the current moment.

[0011] When the absolute value of the wind power output fluctuation rate at the current moment is less than or equal to the set fluctuation rate limit, the first deviation and the second deviation are calculated; the first deviation is the deviation between the instruction value issued by the dispatching side at the current moment and the actual active power generated by the wind power at the current moment; the second deviation is the deviation between the maximum power value that can be generated by the wind turbine at the current moment and the actual active power generated by the wind power at the current moment.

[0012] When the first deviation is less than or equal to the second deviation, the power generation instruction value assigned to the wind turbine by the wind-solar combined power station at the current moment is calculated; the power generation instruction value assigned to the wind turbine by the wind-solar combined power station at the current moment is the sum of the power generation instruction value assigned to the wind turbine by the wind-solar combined power station at the previous moment, the instruction value issued by the dispatching side at the previous moment and the deviation between the actual active power of wind power.

[0013] When the first deviation is greater than the second deviation, the first instruction value assigned to photovoltaic power generation by the wind-solar combined power station at the current moment is calculated; the first instruction value assigned to photovoltaic power generation by the wind-solar combined power station at the current moment is the sum of the instruction value assigned to photovoltaic power generation by the wind-solar combined power station at the previous moment and the deviation between the instruction value issued by the dispatching side at the previous moment and the maximum power generation capacity of the wind turbine.

[0014] In a second aspect, the present invention provides a computer device comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement any one of the above-described methods for real-time control of active power of a wind-solar combined power station.

[0015] In a third aspect, the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements any of the above-mentioned methods for real-time control of active power of a wind-solar combined power station.

[0016] In a fourth aspect, the present invention provides a computer program product, comprising a computer program, which, when executed by a processor, implements any one of the above-mentioned methods for real-time control of active power of a wind-solar combined power station.

[0017] According to the specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0018] The present invention provides a method, device, medium and product for real-time control of active power of a wind-solar combined power station. First, real-time relevant data of the wind-solar combined power station is obtained. Then, based on the real-time relevant data of the wind-solar combined power station, the wind power output fluctuation rate at the current moment is calculated. When the absolute value of the wind power output fluctuation rate at the current moment is greater than a set fluctuation rate limit, a first output value is calculated, and a second output value is calculated based on the first output value. The first output value is the ideal output value of the entire wind-solar combined power station at the current moment in the wind power fluctuation suppression mode, and the second output value is the ideal output value of the entire photovoltaic power generation system at the current moment in the wind power fluctuation suppression mode. output value; when the absolute value of the wind power output fluctuation rate at the current moment is less than or equal to the set fluctuation rate limit, a first deviation and a second deviation are calculated; the first deviation is the deviation between the current dispatch command value and the actual wind power active power generated at the current moment; the second deviation is the deviation between the current wind turbine maximum power value and the actual wind power active power generated at the current moment; further, when the first deviation is less than or equal to the second deviation, the wind turbine power generation command value assigned by the wind-solar combined power station at the current moment can be calculated; when the first deviation is greater than the second deviation, the photovoltaic power generation command value assigned by the wind-solar combined power station at the current moment can be calculated. This invention considers using the photovoltaic power generation system output to smooth wind power fluctuations when wind power fluctuates significantly in extreme weather conditions. Furthermore, when the wind-solar combined power station is operating at power limit, if there is a steady-state deviation between the actual wind power output and the planned wind power output, the photovoltaic power generation system output compensates for the current deviation. Furthermore, when the actual wind power output reaches its maximum and the active power at the wind-solar combined power station's grid connection point deviates from the dispatch command, the photovoltaic power generation system output compensates for the current deviation. The present invention can, under the premise of ensuring that local fluctuation rate indicators and tracking output error indicators are met, take into account the wind energy and solar energy utilization rate of the photovoltaic-participated power supply system to smooth wind power fluctuations, and at the same time handle the problems of tracking output plan and wind power fluctuations. It can better overcome the randomness and intermittency of wind and solar power generation and improve the friendliness of grid connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is a diagram of the application environment of a real-time control method for active power of a wind-solar combined power station in one embodiment of the present invention.

[0021] Figure 2 A flow chart of a method for real-time control of active power in a wind-solar combined power station provided by one embodiment of the present invention.

[0022] Figure 3 This is a flow chart of a photovoltaic power generation system smoothing wind power fluctuations when the active power fluctuations of the entire station are large, provided by an embodiment of the present invention.

[0023] Figure 4 This is an overall control flow chart provided by one embodiment of the present invention when the fluctuation of the active power of the entire station is small.

[0024] Figure 5 This is an effect diagram of the active power fluctuation smoothing mode provided by one embodiment of the present invention.

[0025] Figure 6 A schematic diagram of the active power output curve of a wind-solar station provided in one embodiment of the present invention.

[0026] Figure 7 A schematic diagram of the structure of a computer device provided in one embodiment of the present invention. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] Search results indicate that there is limited research on control strategies for stabilizing wind power output fluctuations by using photovoltaic power in combined wind and solar power plants. Based on the current wind power output, real-time photovoltaic output is controlled to achieve smooth wind power output and stably track planned output, ensuring the quality of wind power connected to the grid.

[0030] In the above context, the method of controlling wind power fluctuations with the participation of photovoltaic systems and compensating the actual wind power generation with photovoltaic output is the control strategy required by the current wind-solar combined power station. It can consider the utilization rate of wind and solar energy in the power supply system with the participation of photovoltaics to smooth wind power fluctuations, and deal with the problems of tracking output plan and wind power fluctuations at the same time, which can better overcome the randomness and intermittency of wind and solar power generation and improve the friendliness of grid connection, under the premise of meeting local fluctuation rate indicators and tracking output error indicators.

[0031] The real-time control method for active power of wind-solar combined power station provided by the embodiment of the present invention can be applied to Figure 1In the application environment shown, the terminal 102 communicates with the server 104 via a network. The data storage system can store data that the server 104 needs to process. The data storage system can be set up separately, integrated on the server 104, or placed on the cloud or other servers. The terminal 102 can send the acquired real-time relevant data of the wind-solar combined power station to the server 104. After the server 104 receives the real-time relevant data of the wind-solar combined power station, the server 104 calculates the wind power output fluctuation rate at the current moment based on the real-time relevant data of the wind-solar combined power station; when the absolute value of the wind power output fluctuation rate at the current moment is greater than the set fluctuation rate limit, the first output value is calculated; the fluctuation rate limit is a value set according to local actual conditions or according to grid demand; the first output value is the ideal output value of the entire wind-solar combined power station in the wind power fluctuation smoothing mode at the current moment; the first output value is the product of the fluctuation rate limit and the ideal output value of the entire wind-solar combined power station in the wind power fluctuation smoothing mode at the previous moment; the second output value is calculated based on the first output value; the second output value is the output value of the photovoltaic power generation system in the wind power fluctuation smoothing mode at the current moment; the second output value is the difference between the first output value and the total actual power generated by the wind-solar combined power station at the current moment Absolute value; when the absolute value of the wind power output fluctuation rate at the current moment is less than or equal to the set fluctuation rate limit, the first deviation and the second deviation are calculated; the first deviation is the deviation between the instruction value issued by the dispatching side at the current moment and the actual active power of wind power at the current moment; the second deviation is the deviation between the maximum power value of the wind turbine at the current moment and the actual active power of wind power at the current moment; when the first deviation is less than or equal to the second deviation, the wind-solar combined power station is calculated to assign to the wind turbine power generation instruction value at the current moment; the wind-solar combined power station is assigned to the wind turbine power generation instruction value at the current moment, which is the sum of the wind-solar combined power station assigned to the wind turbine power generation instruction value at the previous moment, the instruction value issued by the dispatching side at the previous moment, and the deviation of the actual active power of wind power; when the first deviation is greater than the second deviation, the first instruction value assigned to photovoltaic power generation by the wind-solar combined power station at the current moment is calculated; the first instruction value assigned to photovoltaic power generation by the wind-solar combined power station at the previous moment is the sum of the instruction value assigned to photovoltaic power generation by the wind-solar combined power station at the previous moment, the instruction value issued by the dispatching side at the previous moment, and the deviation of the maximum power value of the wind turbine. The server 104 can feed back to the terminal 102 the output value of the photovoltaic power generation system at the current moment in smoothing the wind power fluctuation, or the wind turbine power generation instruction value assigned by the wind-solar combined power station at the current moment, or the first instruction value assigned by the wind-solar combined power station at the current moment to photovoltaic power generation.In addition, in some embodiments, the active real-time control method of the wind-solar combined power station can also be implemented independently by the server 104 or the terminal 102. For example, the terminal 102 can directly perform active real-time control on the acquired real-time relevant data of the wind-solar combined power station, or the server 104 can obtain the real-time relevant data of the wind-solar combined power station from the data storage system and perform active real-time control on the real-time relevant data of the wind-solar combined power station.

[0032] Terminal 102 may include, but is not limited to, various desktop computers, laptops, smartphones, tablet computers, IoT devices, and portable wearable devices. IoT devices may include smart speakers, smart TVs, smart air conditioners, and smart car devices. Portable wearable devices may include smart watches, smart bracelets, and head-mounted devices. Server 104 may be implemented as a standalone server or a server cluster consisting of multiple servers, or may be a cloud server.

[0033] In an exemplary embodiment, Figure 2 As shown, a method for real-time control of active power of a wind-solar combined power station is provided. The method is executed by a computer device, specifically a computer device such as a terminal or a server, or a terminal and a server. In an embodiment of the present invention, the method is applied to Figure 1 The server 104 in the example is used to illustrate the process, which includes the following steps S1 to S7.

[0034] S1: Acquire real-time relevant data of the wind-solar combined power station; the real-time relevant data of the wind-solar combined power station include: the total actual power generated by the wind-solar combined power station at the previous moment, the actual active power generated by wind power at the current moment, the actual active power generated by photovoltaic power at the current moment, the rated installed capacity of the wind farm, the rated installed capacity of the photovoltaic power generation system, the ideal output value of the entire wind-solar combined power station at the previous moment under the condition of smoothing the fluctuation of wind power, the maximum power that can be generated by the wind turbine at the current moment, the maximum power that can be generated by photovoltaic power at the current moment, the minimum power that can be generated by photovoltaic power at the current moment, the power generation instruction value assigned to the wind turbine by the wind-solar combined power station at the previous moment, the deviation between the instruction value issued by the dispatching side at the previous moment and the actual active power generated by wind power, the instruction value assigned to photovoltaic power generation by the wind-solar combined power station at the previous moment, the deviation between the instruction value issued by the dispatching side at the previous moment and the maximum power that can be generated by the wind turbine, and the instruction value issued by the dispatching side at the current moment.

[0035] S2: Calculate the wind power output fluctuation rate at the current moment based on the real-time relevant data of the wind-solar combined power station.

[0036] S3: When the absolute value of the wind power output fluctuation rate at the current moment is greater than the set fluctuation rate limit, the first output value is calculated; the fluctuation rate limit is a value set according to the local actual situation or according to the power grid demand; the first output value is the ideal output value of the entire wind-solar combined power station in the wind power fluctuation smoothing mode at the current moment; the first output value is the product of the fluctuation rate limit and the ideal output value of the entire wind-solar combined power station in the wind power fluctuation smoothing mode at the previous moment.

[0037] S4: Calculate a second output value based on the first output value; the second output value is the output value of the photovoltaic power generation system at the current moment when smoothing the wind power fluctuation; the second output value is the absolute value of the difference between the first output value and the total actual power generated by the wind-solar combined power station at the current moment.

[0038] S5: When the absolute value of the wind power output fluctuation rate at the current moment is less than or equal to the set fluctuation rate limit, the first deviation and the second deviation are calculated; the first deviation is the deviation between the instruction value issued by the dispatching side at the current moment and the actual active power generated by the wind power at the current moment; the second deviation is the deviation between the maximum power value that can be generated by the wind turbine at the current moment and the actual active power generated by the wind power at the current moment.

[0039] S6: When the first deviation is less than or equal to the second deviation, the power generation instruction value assigned to the wind turbine by the wind-solar combined power station at the current moment is calculated; the power generation instruction value assigned to the wind turbine by the wind-solar combined power station at the current moment is the sum of the power generation instruction value assigned to the wind turbine by the wind-solar combined power station at the previous moment, the instruction value issued by the dispatching side at the previous moment and the deviation of the actual active power generated by the wind power.

[0040] S7: When the first deviation is greater than the second deviation, the first instruction value assigned to photovoltaic power generation by the wind-solar combined power station at the current moment is calculated; the first instruction value assigned to photovoltaic power generation by the wind-solar combined power station at the current moment is the sum of the instruction value assigned to photovoltaic power generation by the wind-solar combined power station at the previous moment and the deviation between the instruction value issued by the dispatching side at the previous moment and the maximum power generation capacity of the wind turbine.

[0041] The method is applicable to wind-solar combined power stations. By implementing the above steps S1 to S7, it can consider the utilization rate of wind and solar energy in the power supply system with the participation of photovoltaics to smooth the wind power fluctuations, while ensuring that the local volatility index and tracking output error index are met. At the same time, it can handle the problems of tracking output plan and wind power fluctuations, which can better overcome the randomness and intermittency of wind and solar power generation and improve the friendliness of grid connection.

[0042] In step S2, the current wind power output fluctuation rate is calculated. This is the active power value of the wind-solar combined power station under extreme weather conditions. When turbulent winds or gusts pass through the combined power station, the wind power output fluctuates significantly, affecting the stability of the station's active power output. In this case, the photovoltaic power generation system output is used to smooth out the strong fluctuations in wind power output, ensuring smooth power output across the entire station.

[0043] The calculation formula of the wind power output fluctuation rate at the current moment is:

[0044] P act (k) = P wind (k)+P pv (k) (1);

[0045]

[0046] Among them, P act (k) is the total actual power generated by the wind-solar combined power station at the current moment, P act (k-1) is the total actual power generated by the wind-solar combined power station at the previous moment, P wind (k) is the wind power active power at the current moment, P pv (k) is the photovoltaic active power at the current moment, α(k) is the wind power output fluctuation rate at the current moment, P r_wind is the rated installed capacity of the wind farm, P r_pv It is the rated installed capacity of the photovoltaic power generation system.

[0047] In step S3, the wind-solar combined power station sets a fluctuation rate limit, which is determined by the actual local situation or according to the grid demand (given as 5% in the current case), and compares the wind power output fluctuation rate in each instruction cycle with its fluctuation rate limit. When the absolute value of the wind power output fluctuation rate at the current moment is greater than the set fluctuation rate limit, the calculation formula of the first output value is:

[0048] P stability_act (k) = β × P stability_act (k-1) (3);

[0049] Among them, P stability_act (k) is the ideal output value (i.e., the first output value) of the wind-solar combined power station at the current moment under the condition of smoothing the wind power fluctuation, P stability_act (k-1) is the ideal output value of the wind-solar combined power station at the previous moment under the condition of smoothing the wind power fluctuation, and β is the fluctuation rate limit.

[0050] In step S4, the calculation formula of the second output value is:

[0051] P stability_pv (k)=|P stability_act (k)-Pact (k)| (4);

[0052] Among them, P stability_pv (k) is the output value of the photovoltaic power generation system at the current moment under the condition of smoothing the wind power fluctuation (ie, the second output value).

[0053] In step S5, the calculation formulas for the first deviation and the second deviation are shown in formula (5) and formula (6):

[0054] e1=P cmdall (k)-P wind (k) (5);

[0055] e2=P windmax (k)-P wind (k) (6);

[0056] Among them, e1 is the deviation between the command value issued by the dispatching side at the current moment and the actual active power of wind power at the current moment (i.e., the first deviation), e2 is the deviation between the maximum power value of the wind turbine at the current moment and the actual active power of wind power at the current moment (i.e., the second deviation), P cmdall (k) is the instruction value issued by the scheduling side at the current moment, P windmax (k) is the maximum power that the wind turbine can generate at the current moment.

[0057] In order to make the actual power generated by the station track the dispatching side instructions well, the power generation instruction value assigned to the wind turbine by the wind-solar combined power station at the current moment is calculated according to formula (7).

[0058] P windcmd (k) = P windcmd (k-1)+e1(k-1) (7);

[0059] Among them, P windcmd (k-1) is the power generation instruction value assigned to the wind turbine by the wind-solar combined power station at the previous moment, P windcmd (k) is the power generation instruction value assigned to the wind turbine by the wind-solar combined power station at the current moment, and e1(k-1) is the deviation between the instruction value on the dispatching side and the actual output of the wind turbine at the previous moment.

[0060] If the actual output of the wind turbine reaches the maximum power it can generate but still cannot track the command value issued by the dispatching side, photovoltaic power should be used to compensate for the wind power. According to formula (8), the command value issued by the dispatching side should be within this range.

[0061] P windmax (k)+P pvmin (k)≤P cmdall (k)≤P windmax (k)+P pvmax (k) (8);

[0062] Among them, P pvmax (k) is the maximum photovoltaic power value at the current moment, P pvmin (k) is the minimum photovoltaic power value at the current moment.

[0063] At this time, the deviation between the instruction value issued by the photovoltaic compensation dispatching side and the maximum power that can be generated by the wind turbine is used to make the actual power generated at the grid connection point of the wind-solar combined power station better track the instruction value issued by the dispatching side. The deviation between the instruction value issued by the dispatching side and the maximum power that can be generated by the wind turbine at the current moment is shown in formula (9).

[0064] e3=P cmdall (k)-P windmax (k) (9);

[0065] Among them, e3 is the deviation between the instruction value issued by the dispatching side at the current moment and the maximum power that the wind turbine can generate.

[0066] Calculate the command value assigned to photovoltaic power generation by the wind-solar combined power station at the current moment, so that when the wind-solar combined power station is in free power generation operation, the photovoltaic output can compensate for the actual wind power generation. The calculation formula is as shown in formula (10), so that the actual power generation of the wind-solar combined power station can better track the command value issued by the dispatching side.

[0067] P pvcmd1 (k) = P pvcmd (k-1)+e3(k-1) (10);

[0068] Among them, P pvcmd1 (k) is the instruction value assigned to photovoltaic power generation by the wind-solar combined power station at the first moment, P pvcmd (k-1) is the instruction value assigned to photovoltaic power generation by the wind-solar combined power station at the previous moment, and e3(k-1) is the deviation between the instruction value issued by the dispatching side at the previous moment and the maximum power that can be generated by the wind turbine.

[0069] If, during the process of photovoltaic output compensating for wind power, the actual output of the wind turbine and the actual output of the photovoltaic power plant have both reached full power, but still cannot track the command value issued by the dispatching side, the real-time active power control method of the wind-solar combined power station further includes:

[0070] S8: When the first deviation is greater than the second deviation, and the instruction value issued by the dispatching side at the current moment is greater than or equal to the sum of the maximum power value of the photovoltaic power generation and the maximum power value of the wind turbine power generation, the abandonment rate is determined.

[0071] S9: According to the abandoned solar power rate, the maximum photovoltaic power generation value of the wind-solar combined power station after abandoned solar power is adjusted.

[0072] The actual power generated at the grid connection point of the wind-solar combined power station cannot track the command value issued by the dispatching side very well. The actual power generated by wind power and photovoltaic power have both reached their peaks, as shown in formula (11).

[0073] P cmdall (k)≥P windmax +P pvmax (11);

[0074] At this time, due to the large fluctuations in the actual wind power generation, the wind-solar combined power station generates unstable power. By increasing the curtailment rate of the wind-solar combined power station, the smooth output of wind power is guaranteed. As shown in formula (12), when the curtailment rate δ is large enough, the maximum photovoltaic power generation capacity of the wind-solar combined power station will be reduced, leaving some of the maximum photovoltaic power generation capacity margin to smooth out the wind power fluctuations in this situation and ensure the stability of the actual power generation capacity of the wind-solar combined power station.

[0075] P invmax =P pvmax ×(1-δ) (12);

[0076] Among them, δ is the light abandonment rate, P invmax is the maximum photovoltaic power that can be generated by the wind-solar combined power station after the solar power is abandoned, P pvmax It is the maximum photovoltaic power that can be generated by the wind-solar combined power station before the power is abandoned.

[0077] In another exemplary embodiment of the present invention, the method for real-time control of active power of a wind-solar combined power station further includes:

[0078] S10: When the actual output of the wind-solar combined power station reaches a steady state, a third deviation is calculated; the third deviation is the steady-state deviation between the actual active power generated by the wind power at the current moment and the power generation instruction value allocated to the wind turbine by the wind-solar combined power station at the current moment.

[0079] S11: Based on the third deviation and the instruction value assigned to photovoltaic power generation by the wind-solar combined power station at the previous moment, calculate the instruction value assigned to photovoltaic power generation by the wind-solar combined power station at the second current moment; the instruction value assigned to photovoltaic power generation by the wind-solar combined power station at the second current moment is the sum of the instruction value assigned to photovoltaic power generation by the wind-solar combined power station at the previous moment and the third deviation.

[0080] In step S10, the ideal output value generated by the photovoltaic compensation deviation value is calculated when the actual wind power output reaches a steady state and there is a deviation between the actual wind power output and the wind power command value assigned to the wind power combined power station, so as to ensure smooth and stable wind power output and enable the wind-solar combined power station to track the stable output specified by the dispatching side.

[0081] The calculation formula of the third deviation is:

[0082] ess=Pwindcmd(k)-Pwind(k) (13);

[0083] Among them, ess is the third deviation, P windcmd (k) is the power generation instruction value assigned to the wind turbine by the wind-solar combined power station at the current moment, Pwindcmd The calculation of (k) refers to formula (7).

[0084] According to the current photovoltaic system status of the wind-solar combined power station, the ideal output value of the photovoltaic array of the wind-solar combined power station is calculated under the control mode of tracking the command value issued by the dispatching side.

[0085] The photovoltaic output is used to compensate for the deviation between the wind power command value and the actual wind power output value at this time. According to the photovoltaic command value assigned to the wind-solar combined power station at the previous moment, the steady-state deviation between the wind power command and the actual wind power output at the current moment is superimposed as the second command value assigned to photovoltaic power generation by the wind-solar combined power station at the current moment, so that the current actual wind power output can better track the command assigned to wind power by the wind-solar combined power station at the current moment. The calculation formula is shown in the following formula (14).

[0086] P pvcmd2 (k) = P pvcmd (k-1)+ess (14);

[0087] Among them, P pvcmd2 (k) is the instruction value allocated to photovoltaic power generation by the wind-solar combined power station at the second current moment.

[0088] The flow chart of the photovoltaic power generation system for smoothing wind power fluctuations when the active power fluctuations of the entire station are large is as follows: Figure 3 As shown, the overall control flow chart when the active power fluctuation of the entire station is small is as follows Figure 4 shown.

[0089] Depend on Figure 5 It has been observed that under the influence of extreme weather, the actual active power generated by the wind-solar combined power station will fluctuate and the fluctuation is relatively severe. This method can achieve the purpose of smoothing the active power and reduce the volatility of the wind-solar combined power station to a certain extent.

[0090] Depend on Figure 6 It was observed that when there was a deviation between the actual wind power generation and the wind farm instructions, the wind-solar combined power station used photovoltaic output to compensate for the actual wind power generation and the instructions at this time, thereby achieving the purpose of real-time compensation and ensuring the stable active power output of the wind-solar combined power station.

[0091] This method considers using photovoltaic output to smooth out wind power fluctuations during extreme weather conditions. Furthermore, when a wind-solar combined power station operates at power limits and there is a steady-state deviation between actual wind power output and planned wind power output, the photovoltaic output compensates for this deviation. Furthermore, when actual wind power output reaches its maximum and the active power at the wind-solar combined power station's grid connection point deviates from the dispatcher's instructions, the photovoltaic output compensates for this deviation. If the dispatcher's instructions exceed the sum of the maximum wind power and photovoltaic power generation capacity, a certain curtailment rate is applied to ensure smooth wind power output.

[0092] The present invention also provides an application scenario, which applies the above-mentioned real-time control method for active power of wind-solar combined power station. Specifically: the real-time control method for active power of wind-solar combined power station provided in this embodiment can be applied in wind power generation scenarios. The wind power generation scenario includes a data acquisition link, a comparison and analysis link, and a data calculation link; the acquired real-time relevant data of the wind-solar combined power station enters the comparison and analysis link and the data calculation link, that is, according to the real-time relevant data of the wind-solar combined power station, the wind power output fluctuation rate at the current moment is calculated; when the absolute value of the wind power output fluctuation rate at the current moment is greater than the set fluctuation rate limit, the first output value is calculated; according to the first output value, the second output value is calculated; the first output value is the product of the fluctuation rate limit and the ideal output value of the entire station of the wind-solar combined power station at the previous moment under the condition of smoothing wind power fluctuation; the second output value is the first output value and the wind-solar combined power station at the current moment. The absolute value of the difference between the total actual power generation of the power station; when the absolute value of the wind power output fluctuation rate at the current moment is less than or equal to the set fluctuation rate limit, the first deviation and the second deviation are calculated; the first deviation is the deviation between the command value issued by the dispatching side at the current moment and the actual wind power active power at the current moment; the second deviation is the deviation between the maximum power value of the wind turbine at the current moment and the actual wind power active power at the current moment; when the first deviation is less than or equal to the second deviation, the wind-solar combined power station assigned to the wind turbine power generation command value at the current moment is calculated; when the first deviation is greater than the second deviation, the first command value assigned to photovoltaic power generation by the wind-solar combined power station at the current moment is calculated.

[0093] In an exemplary embodiment, a computer device is provided. The computer device may be a server or a terminal. The internal structure diagram thereof may be as follows: Figure 7 As shown. The computer device includes a processor, a memory, an input / output interface (Input / Output, abbreviated as I / O) and a communication interface. The processor, memory and input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and computer program in the non-volatile storage medium. The database of the computer device is used to store real-time relevant data of the wind-solar combined power station. The input / output interface of the computer device is used to exchange information between the processor and external devices. The communication interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a method for real-time active power control of a wind-solar combined power station is implemented.

[0094] Those skilled in the art will understand that Figure 7The structure shown in the figure is merely a block diagram of a portion of the structure related to the solution of the present invention and does not constitute a limitation on the computer device to which the solution of the present invention is applied. The specific computer device may include more or fewer components than shown in the figure, or combine certain components, or have a different component arrangement.

[0095] In an exemplary embodiment, a computer device is further provided, including a memory and a processor. The memory stores a computer program, and the processor implements the above method embodiments when executing the computer program.

[0096] In an exemplary embodiment, a computer-readable storage medium is provided, storing a computer program, which implements the above-mentioned method embodiments when executed by a processor.

[0097] In an exemplary embodiment, a computer program product is provided, including a computer program. When the computer program is executed by a processor, the above method embodiments are implemented.

[0098] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in the present invention are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant regulations.

[0099] Those skilled in the art will appreciate that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, database or other media used in the embodiments provided by the present invention can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM may be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM).

[0100] The database involved in each embodiment provided by the present invention may include at least one of a relational database and a non-relational database. Non-relational databases may include, but are not limited to, distributed databases based on blockchain. The processor involved in each embodiment provided by the present invention may be, but is not limited to, a general-purpose processor, a central processing unit, a graphics processing unit, a digital signal processor, a programmable logic unit, a data processing logic unit based on quantum computing, etc.

[0101] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0102] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A real-time control method for active power of a wind-solar combined power station, characterized in that: The real-time control method for active power of the wind-solar combined power station includes: Acquire real-time relevant data of the wind-solar combined power station; the real-time relevant data of the wind-solar combined power station include: the total actual power generated by the wind-solar combined power station at the previous moment, the actual active power generated by wind power at the current moment, the actual active power generated by photovoltaic power at the current moment, the rated installed capacity of the wind farm, the rated installed capacity of the photovoltaic power generation system, the ideal output value of the entire station of the wind-solar combined power station at the previous moment under the condition of smoothing the fluctuation of wind power power, the maximum power value of the wind turbine that can be generated at the current moment, the maximum power value of photovoltaic power at the current moment, the minimum power value of photovoltaic power at the current moment, the power generation instruction value assigned to the wind turbine by the wind-solar combined power station at the previous moment, the deviation between the instruction value issued by the dispatching side at the previous moment and the actual active power generated by wind power, the instruction value assigned to photovoltaic power generation by the wind-solar combined power station at the previous moment, the deviation between the instruction value issued by the dispatching side at the previous moment and the maximum power value of the wind turbine, and the instruction value issued by the dispatching side at the current moment; Calculate the wind power output fluctuation rate at the current moment based on the real-time relevant data of the wind-solar combined power station; When the absolute value of the wind power output fluctuation rate at the current moment is greater than the set fluctuation rate limit, a first output value is calculated; the fluctuation rate limit is a value set according to local actual conditions or according to grid demand; the first output value is the ideal output value of the entire station of the wind-solar combined power station in the wind power fluctuation smoothing mode at the current moment; the first output value is the product of the fluctuation rate limit and the ideal output value of the entire station of the wind-solar combined power station in the wind power fluctuation smoothing mode at the previous moment; A second output value is calculated based on the first output value; the second output value is the output value of the photovoltaic power generation system at the current moment when smoothing the wind power fluctuation; the second output value is the absolute value of the difference between the first output value and the total actual power generated by the wind-solar combined power station at the current moment; When the absolute value of the wind power output fluctuation rate at the current moment is less than or equal to the set fluctuation rate limit, a first deviation and a second deviation are calculated; the first deviation is the deviation between the instruction value issued by the dispatching side at the current moment and the actual wind power active power generated at the current moment; the second deviation is the deviation between the maximum power value of the wind turbine at the current moment and the actual wind power active power generated at the current moment; When the first deviation is less than or equal to the second deviation, the power generation instruction value assigned to the wind turbine by the wind-solar combined power station at the current moment is calculated; the power generation instruction value assigned to the wind turbine by the wind-solar combined power station at the current moment is the sum of the power generation instruction value assigned to the wind turbine by the wind-solar combined power station at the previous moment, the instruction value issued by the dispatching side at the previous moment, and the deviation of the actual active power generated by the wind power; When the first deviation is greater than the second deviation, the first instruction value assigned to photovoltaic power generation by the wind-solar combined power station at the current moment is calculated; the first instruction value assigned to photovoltaic power generation by the wind-solar combined power station at the current moment is the sum of the instruction value assigned to photovoltaic power generation by the wind-solar combined power station at the previous moment and the deviation between the instruction value issued by the dispatching side at the previous moment and the maximum power generation capacity of the wind turbine.

2. The real-time control method for active power of a wind-solar combined power station according to claim 1, characterized in that: The real-time control method for active power of the wind-solar combined power station further includes: When the first deviation is greater than the second deviation, and the instruction value issued by the dispatching side at the current moment is greater than or equal to the sum of the maximum power value of the photovoltaic power generation at the current moment and the maximum power value of the wind turbine at the current moment, the abandonment rate is determined; According to the abandoned light rate, the maximum photovoltaic power generation value of the wind-solar combined power station after abandoned light is adjusted.

3. The real-time control method for active power of a wind-solar combined power station according to claim 1, characterized in that: The real-time control method for active power of the wind-solar combined power station further includes: When the actual output of the wind-solar combined power station reaches a steady state, a third deviation is calculated; the third deviation is the steady-state deviation between the actual active power generated by the wind power at the current moment and the power generation instruction value assigned to the wind turbine by the wind-solar combined power station at the current moment; Based on the third deviation and the instruction value assigned to photovoltaic power generation by the wind-solar combined power station at the previous moment, the instruction value assigned to photovoltaic power generation by the wind-solar combined power station at the second current moment is calculated; the instruction value assigned to photovoltaic power generation by the wind-solar combined power station at the second current moment is the sum of the instruction value assigned to photovoltaic power generation by the wind-solar combined power station at the previous moment and the third deviation.

4. The real-time control method for active power of a wind-solar combined power station according to claim 1, characterized in that: The calculation formula of the wind power output fluctuation rate at the current moment is: P act (k)=P wind (k)+P pv (k); Among them, P act (k) is the total actual power generated by the wind-solar combined power station at the current moment, P act (k-1) is the total actual power generated by the wind-solar combined power station at the previous moment, P wind (k) is the wind power active power at the current moment, P pv (k) is the photovoltaic active power at the current moment, α(k) is the wind power output fluctuation rate at the current moment, P r_wind is the rated installed capacity of the wind farm, P r_pv It is the rated installed capacity of the photovoltaic power generation system.

5. The real-time control method for active power of a wind-solar combined power station according to claim 1, characterized in that: The calculation formula of the instruction value allocated to photovoltaic power generation by the wind-solar combined power station at the first current moment is: P pvcmd1 (k)=P pvcmd (k-1)+e3(k-1); Among them, P pvcmd1 (k) is the instruction value assigned to photovoltaic power generation by the wind-solar combined power station at the first moment, P pvcmd (k-1) is the instruction value assigned to photovoltaic power generation by the wind-solar combined power station at the previous moment, and e3(k-1) is the deviation between the instruction value issued by the dispatching side at the previous moment and the maximum power that can be generated by the wind turbine.

6. The method for real-time control of active power of a wind-solar combined power station according to claim 2, characterized in that: The calculation formula for the maximum photovoltaic power value of the wind-solar combined power station after the abandoned solar power is: P invmax =P pvmax ×(1-d); Among them, δ is the abandoned light rate, P invmax is the maximum photovoltaic power that can be generated by the wind-solar combined power station after the solar power is abandoned, P pvmax It is the maximum photovoltaic power that can be generated by the wind-solar combined power station before the power is abandoned.

7. The method for real-time control of active power of a wind-solar combined power station according to claim 3, characterized in that: The calculation formula of the instruction value allocated to photovoltaic power generation by the wind-solar combined power station at the second current moment is: P pvcmd2 (k)=P pvcmd (k-1)+ess; ess=P windcmd (k)-P wind (k); P windcmd (k)=P windcmd (k-1)+e1(k-1); Among them, P pvcmd2 (k) is the instruction value assigned to photovoltaic power generation by the wind-solar combined power station at the second moment, P pvcmd (k-1) is the instruction value assigned to photovoltaic power generation by the wind-solar combined power station at the previous moment, ess is the third deviation, P windcmd (k) is the power generation instruction value assigned to the wind turbine by the wind-solar combined power station at the current moment, P wind (k) is the wind power active power at the current moment, P windcmd (k-1) is the power generation instruction value assigned to the wind turbine by the wind-solar combined power station at the previous moment, and e1(k-1) is the deviation between the instruction value issued by the dispatching side at the previous moment and the actual active power generated by the wind power.

8. A computer device comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the real-time control method for active power of a wind-solar combined power station according to any one of claims 1 to 7.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method for real-time control of active power of a wind-solar combined power station according to any one of claims 1 to 7 is implemented.

10. A computer program product comprising a computer program, characterized in that When the computer program is executed by a processor, the method for real-time control of active power of a wind-solar combined power station according to any one of claims 1 to 7 is implemented.

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