Wind-solar combined power station active real-time control method, device, medium and product

Abstract

The invention discloses an active real-time control method, device, medium and product for a wind-solar combined power station, and relates to the technical field of wind power generation, and the method comprises the steps: obtaining the real-time related data of the wind-solar combined power station; according to the real-time related data of the wind-solar combined power station, the wind power output volatility at the current moment is obtained through calculation; when the absolute value of the wind power output volatility at the current moment is greater than a set volatility limit value, calculating to obtain a first output value; calculating a second output value according to the first output value; when the absolute value of the wind power output volatility at the current moment is smaller than or equal to a set volatility limit value, a first deviation and a second deviation are obtained through calculation; when the first deviation is smaller than or equal to the second deviation, calculating to obtain a power generation instruction value distributed to the fan by the wind-solar combined power station at the current moment; and when the first deviation is greater than the second deviation, calculating to obtain an instruction value allocated to photovoltaic power generation by the wind-solar combined power station at the first current moment. The electric energy quality of the wind power access power grid can be ensured.

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 of a wind-solar combined power station. Background Art

[0002] In recent years, the National Energy Administration has continued to do a good job in the consumption of new energy, continuously improved the regulation capacity of the power system, expanded the market-oriented trading volume of new energy, and promoted the rapid development and efficient use of new energy. In the past two years, the development of new energy has further accelerated, and wind power generation and photovoltaic power generation technologies have gradually developed, and the installed capacity of both has increased year by year. In order to adapt to the rapid growth of new energy, ensure the high-quality development of new energy, develop new energy power generation resources on a large scale, build wind and solar power stations with good network characteristics, and promote the construction of new energy supply and consumption systems with high-quality consumption. 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 continues to mature, grid-connected capacity continues to increase, but wind turbine power generation mainly depends on wind speed. Due to the influence of uncontrollable factors such as geography and weather, the continuous change of wind speed makes the wind power output fluctuate violently and difficult to accurately predict. When wind power is connected to the grid, it will affect the stable and safe operation of the power system. In order to ensure the original power quality when wind power is connected, countries limit the installed capacity of wind turbines to reduce the impact of wind power fluctuations on the stability of the power grid. However, this increases the wind abandonment rate and greatly reduces the utilization rate of wind energy. In order to smooth the problem of wind power fluctuations, the wind turbine power output is currently mainly smoothed by controlling the wind power output power by utilizing the characteristics of the wind turbine and configuring the output power with energy storage devices. However, this cannot effectively overcome the randomness of wind power generation, nor can it guarantee the power quality of wind power connected to the grid. Summary of the invention

[0004] The purpose of the present invention is to provide a method, device, medium and product for real-time control of active power in 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 real-time control method for active power of a wind-solar combined power station, the real-time control method for active power of a wind-solar combined power station 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 whole station of the wind-solar combined power station under the previous moment to smooth the fluctuation of wind power, the maximum power value of the wind turbine 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 allocated 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 allocated 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.

[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] According to 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 generation of 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 and 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.

[0013] 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; the first command value assigned to photovoltaic power generation by the wind-solar combined power station at the current moment is the sum of the command value assigned to photovoltaic power generation by the wind-solar combined power station at the previous moment and the deviation between the command value issued by the dispatching side at the previous moment and the maximum power that can be generated by 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 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 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, 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 a set fluctuation rate limit, a first output value is calculated, and a second output value is calculated according to 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 a mode of smoothing wind power fluctuations, and the second output value is the ideal output value of the entire wind-solar combined power station at the current moment in a mode of smoothing wind power fluctuations. 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, 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 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; and then when the first deviation is less than or equal to the second deviation, the wind-solar combined power station can be calculated to assign the wind turbine power generation command value at the current moment; 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 can be calculated. The present invention considers that in extreme weather, when the wind power fluctuation is large, the output of the photovoltaic power generation system is used to smooth the wind power fluctuation. And when the wind-solar combined power station is operating at a power limit, when there is a steady-state deviation between the actual wind power output and the wind power output plan, the photovoltaic power generation system output compensates for the deviation value at this time. And when the actual wind power output value reaches the maximum, and there is a deviation between the active power of the wind-solar combined power station and the dispatching side command, the photovoltaic output compensates for the deviation value at this time. 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 utilization rate of wind energy and solar energy in the photovoltaic-participated power supply system for smoothing wind power fluctuations, and simultaneously 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 drawings required for use in the embodiments will be briefly introduced below. 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 creative work.

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

[0022] Figure 3 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 in one embodiment of the present invention.

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

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

[0025] Figure 6 A schematic diagram of an 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 by an embodiment of the present invention. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work 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] In terms of the control strategy of stabilizing wind power output fluctuations with photovoltaic output in wind-solar combined power stations, according to the search results, there are few related studies. According to the current wind power output, the real-time photovoltaic output process is controlled so that wind power can achieve smooth output and stably track the planned output, ensuring the power quality of wind power connected to the grid.

[0030] In the above context, the method of smoothing wind power fluctuation control 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 to smooth wind power fluctuations with the participation of photovoltaic systems, and deal with the problems of tracking output plan and wind power fluctuations at the same time. It 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 the local fluctuation rate index and tracking output error index.

[0031] The real-time control method for active power of a 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 through 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 according to 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 the local actual situation or according to the power 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 suppression 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 under the wind power fluctuation suppression at the previous moment; the second output value is calculated according to the first output value; the second output value is the output value of the photovoltaic power generation system under the wind power fluctuation suppression at the current moment; the second output value is the difference between the first output value and the total actual power generation of 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 command 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 wind-solar combined power station is calculated to allocate the wind turbine power generation command value at the current moment; the wind-solar combined power station is allocated to the wind turbine power generation command value at the current moment, which is the sum of the wind-solar combined power station allocated to the wind turbine power generation command value at the previous moment, the command value issued by the dispatching side at the previous moment and the deviation of the actual wind power active power generated; when the first deviation is greater than the second deviation, the first command value allocated to photovoltaic power generation by the wind-solar combined power station at the current moment is calculated; the first command value allocated to photovoltaic power generation by the wind-solar combined power station at the current moment is the sum of the command value allocated to photovoltaic power generation by the wind-solar combined power station at the previous moment, the command value issued by the dispatching side at the previous moment and the deviation of the maximum power generated by the wind turbine. Server 104 can feed back to terminal 102 the output value of the photovoltaic power generation system at the current moment in smoothing wind power fluctuations, or the power generation instruction value assigned to the wind turbine by the wind-solar combined power station at the current moment, or the instruction value assigned to photovoltaic power generation by the wind-solar combined power station at the current moment.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 related data of the wind-solar combined power station, or the server 104 can acquire the real-time related data of the wind-solar combined power station from the data storage system and perform active real-time control on the real-time related data of the wind-solar combined power station.

[0032] The terminal 102 may be, but is not limited to, various desktop computers, laptop computers, smart phones and tablet computers, IoT devices and portable wearable devices. IoT devices may be smart speakers, smart TVs, smart air conditioners, smart car-mounted devices, etc. Portable wearable devices may be smart watches, smart bracelets, head-mounted devices, etc. The server 104 may be implemented as an independent 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, and specifically can be executed by a computer device such as a terminal or a server alone, or can be executed by a terminal and a server together. In an embodiment of the present invention, the method is applied to Figure 1 The server 104 in the example is used as an example to illustrate the method, which includes the following steps S1 to S7. Among them:

[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 whole station of the wind-solar combined power station under the previous moment to smooth the fluctuation of wind power, the maximum power value of the wind turbine 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 allocated 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 allocated 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.

[0035] S2: Calculate the wind power output fluctuation rate at the current moment according to 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 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.

[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 under the condition of 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 and 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.

[0040] S7: When the first deviation is greater than the second deviation, the command value assigned to photovoltaic power generation by the first wind-solar combined power station at the current moment is calculated; the first command value assigned to photovoltaic power generation by the first wind-solar combined power station at the current moment is the sum of the command value assigned to photovoltaic power generation by the wind-solar combined power station at the previous moment and the deviation between the command value issued by the dispatching side at the previous moment and the maximum power that can be generated by 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 energy and solar energy in the power supply system with the participation of photovoltaics to smooth the fluctuation of wind power, while ensuring that the local fluctuation rate index and the tracking output error index are met. At the same time, it can handle the problems of tracking output plan and wind power fluctuation, and 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, that is, the active power value of the wind-solar combined power station under extreme weather conditions. When there is turbulent wind or gusts passing through the combined power station, the wind power actual power will fluctuate strongly, thus affecting the stability of the actual active power of the entire station. At this time, the output of the photovoltaic power generation system is used to smooth the strong fluctuation of the wind power actual power, ensuring the smooth output of the entire station power.

[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 power station at the current moment, P act (k-1) is the total actual power generated by the wind-solar power station at the previous moment, P wind (k) is the actual active power of wind power at the current moment, P pv (k) is the actual active power of photovoltaic power generation at the current moment, α(k) is the fluctuation rate of wind power output 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 volatility limit, which is determined by the local actual situation or according to the power grid demand (given as 5% in the current case), and compares the wind power output volatility in each instruction cycle with its volatility limit. When the absolute value of the wind power output volatility at the current moment is greater than the set volatility 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 fluctuation of wind power, 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 of the first deviation and the second deviation are shown in formula (5) and formula (6):

[0054] e 1 =P cmdall (k)-P wind (k) (5);

[0055] e 2 =P windmax (k)-P wind (k) (6);

[0056] Among them, e 1 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), e 2 is the deviation between the maximum power value of the wind turbine at the current moment and the actual active power of the wind power at the current moment (i.e., the second deviation), P cmdall (k) is the instruction value issued by the dispatching 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)+e 1 (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 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, e 1 (k-1) is the deviation between the dispatching side command value and the actual output of the fan at the previous moment.

[0060] If the actual output of the wind turbine reaches the maximum power that the wind turbine 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)≤Pcmdall (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 that can be generated at the current moment.

[0063] At this time, the deviation between the command 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-connected point of the wind-solar combined power station better track the command value issued by the dispatching side. The deviation between the command 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] e 3 =P cmdall (k)-P windmax (k) (9);

[0065] Among them, e 3 It is the deviation between the command 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)+e 3 (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, e 3 (k-1) is the deviation between the command 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 power output compensating wind power, the actual output of the wind turbine and the actual output of the photovoltaic power plant have reached full output, but the command value issued by the dispatching side cannot be tracked, the real-time active power control method of the wind-solar combined power station also 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 that can be generated by the photovoltaic power plant and the maximum power that can be generated by the wind turbine, the abandonment rate is determined.

[0071] S9: According to the abandoned light rate, the maximum photovoltaic power value of the wind-solar combined power station after abandoned light 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 fluctuation of wind power generation, the power generation of the wind-solar combined power station is unstable. By increasing the abandonment rate of the wind-solar combined power station, the smooth output of wind power is guaranteed. As shown in formula (12), when the abandonment rate δ is large enough, the maximum photovoltaic power generation of the wind-solar combined power station will be reduced, leaving part of the maximum photovoltaic power generation margin to smooth the wind power fluctuation in this situation and ensure the stability of the actual power generation 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 abandoned light, 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 real-time active power control method of the 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 a 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: According to the third deviation and the command value assigned to photovoltaic power generation by the wind-solar combined power station at the previous moment, calculate the command value assigned to photovoltaic power generation by the wind-solar combined power station at the second current moment; the command value assigned to photovoltaic power generation by the wind-solar combined power station at the second current moment is the sum of the command 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 by the current wind-solar 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, P windcmd 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 issued at this time and the actual wind power output value. 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 at the current moment and the actual wind power output is superimposed, and the second command value assigned to photovoltaic power generation by the wind-solar combined power station at the current moment is used as the command value assigned to photovoltaic power generation by the wind-solar combined power station. This allows the current actual wind power output to better track the command assigned to wind power by the current wind-solar combined power station. 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 command value assigned 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 fluctuation when the active power fluctuation of the whole station is large is as follows: Figure 3 As shown, the overall control flow chart when the active power fluctuation of the whole station is small is as follows Figure 4 shown.

[0089] Depend on Figure 5 It is 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 quite 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 is observed that when there is a deviation between the actual wind power generation and the wind farm command, the wind-solar combined power station uses photovoltaic output to compensate for the actual wind power generation and the command 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 takes into account the use of photovoltaic output to smooth out wind power fluctuations when wind power fluctuates greatly in extreme weather. When the wind-solar combined power station is operating at limited power, when there is a steady-state deviation between the actual wind power output and the wind power output plan, the photovoltaic output compensates for the deviation at this time. When the actual wind power output reaches the maximum, and there is a deviation between the active power of the wind-solar combined power station and the dispatching side instruction, the photovoltaic output compensates for the deviation at this time. If the dispatching side instruction value is greater than the sum of the maximum wind power and the maximum photovoltaic power, a certain abandonment rate is increased 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 a wind-solar combined power station. Specifically: The real-time control method for active power of a wind-solar combined power station provided in this embodiment can be applied in a wind power generation scenario. 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, a first output value is calculated; according to the first output value, a 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 under the previous moment to smooth the wind power fluctuation; the second output value is the first output value and the current wind-solar combined power station. 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 7As shown. The computer device includes a processor, a memory, an input / output interface (Input / Output, referred to as I / O) and a communication interface. Among them, the processor, the memory and the input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. Among them, 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 the 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 an external device. 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 7 The structure shown in the figure is only a block diagram of a part 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 those shown in the figure, or combine certain components, or have a different arrangement of components.

[0095] In an exemplary embodiment, a computer device is further provided, including a memory and a processor, wherein a computer program is stored in the memory, and the above-mentioned method embodiments are implemented when the processor executes the computer program.

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

[0097] In an exemplary embodiment, a computer program product is provided, including a computer program, and when the computer program is executed by a processor, the above-mentioned 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 can understand that all or part of the processes in the above-mentioned embodiments can be completed by instructing the relevant hardware through a computer program, and 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 the memory, database or other medium 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), magnetoresistive 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. The non-relational database may include a distributed database based on blockchain, etc., but is not limited thereto. The processor involved in each embodiment provided by the present invention may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but is not limited thereto.

[0101] The technical features of the above embodiments may 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] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood 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 comprises: 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 whole station of the wind-solar combined power station under the condition of smoothing the fluctuation of wind power at the previous moment, the maximum power value of the wind turbine 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 generated by the wind turbine, and the instruction value issued by the dispatching side at the current moment; 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; 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 station of the wind-solar combined power station in the wind power fluctuation suppression 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 suppression 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 under the condition of 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 generation of 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, 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 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 and 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; 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; the first command value assigned to photovoltaic power generation by the wind-solar combined power station at the current moment is the sum of the command value assigned to photovoltaic power generation by the wind-solar combined power station at the previous moment and the deviation between the command value issued by the dispatching side at the previous moment and the maximum power that can be generated by the wind turbine.

2. The real-time control method for active power of a wind-solar combined power station according to claim 1 is characterized in that: The real-time control method for active power of the wind-solar combined power station also 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 is characterized in that: The real-time active power control method of the wind-solar combined power station also 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 a 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; According to the third deviation and the command value assigned to photovoltaic power generation by the wind-solar combined power station at the previous moment, the command value assigned to photovoltaic power generation by the wind-solar combined power station at the second current moment is calculated; the command value assigned to photovoltaic power generation by the wind-solar combined power station at the second current moment is the sum of the command 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 is 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 power station at the current moment, P act (k-1) is the total actual power generated by the wind-solar power station at the previous moment, P wind (k) is the actual active power of wind power at the current moment, P pv (k) is the actual active power of photovoltaic power generation at the current moment, α(k) is the fluctuation rate of wind power output 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 is characterized in that: The calculation formula of the command 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 command 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 command value issued by the dispatching side at the previous moment and the maximum power that can be generated by the wind turbine.

6. The real-time control method for active power of a wind-solar combined power station according to claim 2 is characterized in that: The calculation formula for the maximum photovoltaic power value of the wind-solar combined power station after the abandoned light is: P invmax =P pvmax ×(1-d); 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 abandoned light, 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 real-time control method for active power of a wind-solar combined power station according to claim 3 is characterized in that: The calculation formula of the command 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 = Pwindcmd(k)-Pwind(k); P windcmd (k)=P windcmd (k-1)+e1(k-1); Among them, P pvcmd2 (k) is the command 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 actual active power of wind power at the current moment, P windcmd (k-1) is the power generation command 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 command 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 as described in any one of claims 1-7.

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 described in any one of claims 1-7 is implemented.

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

Images