A method and system for operation and maintenance adjustment according to abandoned light quantity of a photovoltaic power station

Abstract

A kind of operation and maintenance adjusting method according to photovoltaic power station light abandonment quantity, comprising the following steps: obtaining the historical operation and maintenance data of photovoltaic power station, determine the time category of photovoltaic power station power limiting;Power data of photovoltaic power station is obtained, wherein power data includes AGC value, inverter actual time sequence power, inverter theoretical time sequence power, inverter historical actual time sequence power, inverter historical theoretical time sequence power;Power data is input into prediction model, and the light abandonment quantity is obtained by prediction model;According to light abandonment quantity and the time category of power limiting, the equipment of photovoltaic power station is adjusted.The present application has important role in power supply and demand balance, energy planning, energy saving and emission reduction, emergency response and evaluation effect etc. through the analysis of light abandonment quantity and power limiting, it is helpful to realize the stability of sustainable energy development and power supply in photovoltaic power station.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic power station management, and in particular to an operation and maintenance adjustment method and system based on the amount of abandoned light in a photovoltaic power station. Background Art

[0002] Usually, energy planning for electricity consumption is related to the power of photovoltaic power stations. Energy planning is adjusted according to the power supply of photovoltaic power stations. At the same time, power restrictions and other measures are taken according to the power supply in different time periods to predict potential power supply shortages or surpluses, providing a basis for formulating reasonable power restriction policies and measures.

[0003] However, the impact of curtailed solar power generation makes it difficult to predict the power output of photovoltaic power plants. This refers to the phenomenon where, despite abundant solar resources, some solar energy cannot be effectively utilized and is wasted due to factors such as excess capacity in the photovoltaic plant or improper system design. This curtailed solar power generation affects the prediction and assessment of the power supply capacity of the photovoltaic plant, thereby affecting the prediction of potential power shortages or surpluses, and ultimately leading to increased operation and maintenance costs for photovoltaic power plants subject to power curtailment. Summary of the Invention

[0004] In view of the above-mentioned defects, the purpose of the present invention is to propose an operation and maintenance adjustment method and system based on the amount of abandoned light in a photovoltaic power station.

[0005] To achieve this purpose, the present invention adopts the following technical solution: an operation and maintenance adjustment method based on the amount of abandoned light in a photovoltaic power station, comprising the following steps:

[0006] Obtain historical operation and maintenance data of photovoltaic power plants to determine the time and type of power restrictions for photovoltaic power plants;

[0007] Obtain power data of the PV power station, including AGC value, actual inverter power, theoretical inverter power, historical actual inverter power, and historical theoretical inverter power.

[0008] Input the power data into the prediction model and use the prediction model to obtain the amount of abandoned light.

[0009] The equipment of the photovoltaic power station is adjusted according to the amount of abandoned light and the time and type of power restriction.

[0010] Preferably, the abandoned light amount includes the abandoned light amount due to power restriction and the abandoned light amount due to planned maintenance;

[0011] The model for predicting the amount of curtailed solar power is as follows:

[0012]

[0013] The model for predicting the amount of abandoned light during planned maintenance is as follows:

[0014]

[0015] Where AGC is the target power for power limiting, P c is the actual sequential power of the inverter, agc is the target power of power restriction of the grid, t1 is the end time of power restriction, t0 is the opening time of power restriction, and P is the restored power;

[0016] The restoration power P is obtained as follows:

[0017]

[0018] Among them, P th is the inverter's historical theoretical timing power, P ch is the actual historical sequential power of the inverter, P t is the theoretical timing power of the inverter.

[0019] Preferably, the power restriction time types include concentrated power restriction period type and disordered power restriction period type.

[0020] Preferably, the specific steps for adjusting the equipment of the photovoltaic power station according to the amount of abandoned light and the time type of power restriction are as follows:

[0021] The sum of the curtailed solar power due to power restriction and the curtailed solar power due to planned maintenance is obtained as the total curtailed solar power.

[0022] Determine whether the total amount of abandoned light is greater than the first threshold. If so, determine again whether the total amount of abandoned light is less than the second threshold. If so, adjust the equipment of the photovoltaic power station according to the time type of power restriction. If greater than the second threshold, send a detection signal.

[0023] Preferably, the steps for adjusting the equipment of the photovoltaic power station according to the time type of power restriction are as follows:

[0024] When the power restriction time type is concentrated power restriction period, the power restriction period is obtained based on historical operation and maintenance data, and the device's working mode is changed to low energy consumption mode during the power restriction period;

[0025] When the power restriction time type is the concentrated power restriction period type, the layout angle of the photovoltaic system components is adjusted.

[0026] An operation and maintenance adjustment system based on the amount of abandoned light in a photovoltaic power station, using the operation and maintenance adjustment method based on the amount of abandoned light in a photovoltaic power station, comprising a confirmation module, a data acquisition module, a prediction module, and an adjustment module;

[0027] The confirmation module is used to obtain historical operation and maintenance data of the photovoltaic power station and determine the time and type of power restriction of the photovoltaic power station;

[0028] The data acquisition module is used to acquire power data of the photovoltaic power station;

[0029] The prediction module is used to input power data into the prediction model and obtain the amount of abandoned light through the prediction model;

[0030] The adjustment module is used to adjust the equipment of the photovoltaic power station according to the amount of abandoned light and the time type of power restriction.

[0031] Preferably, the adjustment module includes a first submodule and a judgment processing submodule;

[0032] The first submodule is used to obtain the sum of the power curtailment amount and the planned maintenance amount as the total curtailment amount;

[0033] The judgment processing submodule is used to determine whether the total amount of abandoned light is greater than a first threshold. If so, it is again determined whether the total amount of abandoned light is less than a second threshold. If so, the equipment of the photovoltaic power station is adjusted according to the time type of power restriction. If so, a detection signal is issued.

[0034] Preferably, the judgment processing submodule further includes a processing unit;

[0035] The processing unit is configured to obtain a power restriction period based on historical operation and maintenance data when the power restriction time type is a concentrated power restriction period type, and change the working mode of the device to a low energy consumption mode during the power restriction period;

[0036] When the power restriction time type is the concentrated power restriction period type, the layout angle of the photovoltaic system components is adjusted.

[0037] One of the above technical solutions has the following advantages or beneficial effects: the present invention plays an important role in power supply and demand balance, energy planning, energy conservation and emission reduction, emergency response and evaluation effect through analysis of abandoned light amount and power restriction, and helps to achieve sustainable energy development and stability of power supply in photovoltaic power stations. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is a flow chart of an embodiment of the method of the present invention.

[0039] Figure 2 It is a structural diagram of an embodiment of the system of the present invention. DETAILED DESCRIPTION

[0040] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention and are not to be construed as limiting the present invention.

[0041] In the description of the embodiments of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the described features. In the description of the embodiments of the present invention, "plurality" means two or more, unless otherwise specifically specified.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "plurality" means two or more. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0043] like Figures 1-2 As shown, an operation and maintenance adjustment method based on the amount of abandoned light in a photovoltaic power station includes the following steps:

[0044] Obtain historical operation and maintenance data of photovoltaic power plants to determine the time and type of power restrictions for photovoltaic power plants;

[0045] Obtain power data of the PV power station, including AGC value, actual inverter power, theoretical inverter power, historical actual inverter power, and historical theoretical inverter power.

[0046] Input the power data into the prediction model and use the prediction model to obtain the amount of abandoned light.

[0047] The equipment of the photovoltaic power station is adjusted according to the amount of abandoned light and the time and type of power restriction.

[0048] Preferably, the abandoned light amount includes the abandoned light amount due to power restriction and the abandoned light amount due to planned maintenance;

[0049] The model for predicting the amount of curtailed solar power is as follows:

[0050]

[0051] The model for predicting the amount of abandoned light during planned maintenance is as follows:

[0052]

[0053] Where AGC is the target power for power limiting, P c is the actual sequential power of the inverter, agc is the target power of power restriction of the grid, t1 is the end time of power restriction, t0 is the opening time of power restriction, and P is the restored power;

[0054] The restoration power P is obtained as follows:

[0055]

[0056] Among them, P th is the inverter's historical theoretical timing power, P ch is the actual historical sequential power of the inverter, P t is the theoretical timing power of the inverter.

[0057] Power curtailment refers to the grid's unified allocation of power to limit generation, even when there are abundant solar resources. The grid has a fixed parameter, the Automatic Gain Control (AGC). When the AGC decreases and the restored power exceeds the AGC, curtailment is considered to have occurred. The power difference is integrated with the curtailment duration to determine the amount of curtailed solar power, expressed in kWh / h. Planned maintenance refers to the cessation of power generation even when solar resources are available. When restored power can still be generated and the actual power is zero, this is considered planned maintenance curtailment, expressed in km / h. This model's advantage is that it incorporates restored power for judgment. This is because there may be situations where the AGC decreases but curtailment does not actually occur, simply due to grid allocation. The restored power can be used to accurately represent the expected power at that moment, making it more accurate than the theoretical power. It also performs real-time calculations and can be monitored in real time via the on-call platform, facilitating power generation planning.

[0058] Preferably, the power restriction time types include concentrated power restriction period type and disordered power restriction period type.

[0059] Preferably, the specific steps for adjusting the equipment of the photovoltaic power station according to the amount of abandoned light and the time type of power restriction are as follows:

[0060] The sum of the curtailed solar power due to power restriction and the curtailed solar power due to planned maintenance is obtained as the total curtailed solar power.

[0061] Determine whether the total amount of abandoned light is greater than the first threshold. If so, determine again whether the total amount of abandoned light is less than the second threshold. If so, adjust the equipment of the photovoltaic power station according to the time type of power restriction. If greater than the second threshold, send a detection signal.

[0062] Preferably, the steps for adjusting the equipment of the photovoltaic power station according to the time type of power restriction are as follows:

[0063] When the time category of power cut is the power cut time period concentration type, the operation mode of the equipment is changed to the low energy consumption mode in the power cut time period according to the historical operation data.

[0064] When the time category of power cut is the power cut time period concentration type, the layout angle of the photovoltaic system component is adjusted.

[0065] In the present application, the operation data of the photovoltaic power station is first obtained, wherein the operation data records the operation mode of the equipment of the photovoltaic power station at different time points. The time of power cut operation, the time of high energy consumption operation and the like are included. The defined time category of the photovoltaic power station can be determined through the historical operation data of the previous month. Preferably, the time category of power cut includes the power cut time period concentration type and the power cut time disorder type. When the power cut time period concentration type is that, in the historical operation data of a month, 70% of the power cut time is fixed in a certain range, for example, the photovoltaic power station has 25 days of power cut time concentrated in 6:00-7:00 in a month, it can be determined that the time category of power cut of the photovoltaic power station is the power cut time period concentration type. On the contrary, the remaining cases can be determined as the power cut time disorder type.

[0066] Then, the power data of the photovoltaic power station is collected, and the power data is input into the corresponding model to obtain the light rejection amount. In the present application, the operation state of the equipment is adjusted according to the light rejection amount and the time category of power cut.

[0067] For example, when the light rejection amount is greater than the second threshold value, it indicates that the light rejection amount of this degree will affect the normal operation of the photovoltaic power station, and a detection signal needs to be sent at this time. The staff will overhaul the photovoltaic power generation device according to the detection signal. When the light rejection amount is less than the second threshold value and greater than the first threshold value, the light rejection amount of this degree affects the operation and maintenance cost of the photovoltaic power station. Therefore, the equipment of the photovoltaic power station can be adjusted according to the time category of power cut. When the time category of power cut is the power cut time period concentration type, the operation mode of the equipment can be adjusted to the energy saving or low energy consumption mode in the power cut time period because the power cut time of the power station is concentrated. The normal operation of the photovoltaic power station can be ensured while the cost is reduced. When the power cut time period concentration type is the power cut time disorder type, the operation mode of the equipment cannot be changed at will because the power cut time cannot be determined. The operation of the photovoltaic power station will be affected. Therefore, when this situation occurs, the layout angle of the photovoltaic system component in the photovoltaic power station can be adjusted. The layout angle of the photovoltaic component directly affects the efficiency of receiving solar radiation. The position of the sun is constantly changing, and the layout angle of the photovoltaic component determines whether it can face the sun to the maximum extent and thus receive more solar radiation. By adjusting the layout angle of the photovoltaic component to keep the best match with the incident angle of the sun, the power generation efficiency of the photovoltaic component can be significantly improved, thereby reducing the light rejection amount and ensuring the normal operation of the photovoltaic power station.

[0068] By analyzing the amount of abandoned light and power restrictions, the present invention plays an important role in balancing power supply and demand, energy planning, energy conservation and emission reduction, emergency response, and evaluation effects, and helps to achieve sustainable energy development and stable power supply in photovoltaic power stations.

[0069] An operation and maintenance adjustment system based on the amount of abandoned light in a photovoltaic power station, using the operation and maintenance adjustment method based on the amount of abandoned light in a photovoltaic power station, comprising a confirmation module, a data acquisition module, a prediction module, and an adjustment module;

[0070] The confirmation module is used to obtain historical operation and maintenance data of the photovoltaic power station and determine the time and type of power restriction of the photovoltaic power station;

[0071] The data acquisition module is used to acquire power data of the photovoltaic power station;

[0072] The prediction module is used to input power data into the prediction model and obtain the amount of abandoned light through the prediction model;

[0073] The adjustment module is used to adjust the equipment of the photovoltaic power station according to the amount of abandoned light and the time type of power restriction.

[0074] Preferably, the adjustment module includes a first submodule and a judgment processing submodule;

[0075] The first submodule is used to obtain the sum of the power curtailment amount and the planned maintenance amount as the total curtailment amount;

[0076] The judgment processing submodule is used to determine whether the total amount of abandoned light is greater than a first threshold. If so, it is again determined whether the total amount of abandoned light is less than a second threshold. If so, the equipment of the photovoltaic power station is adjusted according to the time type of power restriction. If so, a detection signal is issued.

[0077] Preferably, the judgment processing submodule further includes a processing unit;

[0078] The processing unit is configured to obtain a power restriction period based on historical operation and maintenance data when the power restriction time type is a concentrated power restriction period type, and change the working mode of the device to a low energy consumption mode during the power restriction period;

[0079] When the power restriction time type is the concentrated power restriction period type, the layout angle of the photovoltaic system components is adjusted.

[0080] In the description of the specification, reference to "one embodiment", "some embodiments", "an exemplary embodiment", "an example", "a specific example", or "some examples" means that a particular feature, structure, material, or characteristic being described is included in at least one embodiment or example of the application. The appearances of the phrases "in one embodiment", "in some embodiments", "in an exemplary embodiment", "an example", "a specific example", or "some examples" in various places in the specification are not necessarily referring to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0081] Although embodiments of the application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made hereto without departing from the principles and the scope of the application, which is defined by the claims and their equivalents.

Claims

1. A method for operation and maintenance adjustment based on the amount of abandoned light in a photovoltaic power station, characterized in that: The following steps are involved: Obtain historical operation and maintenance data of the photovoltaic power station and determine the time type of power curtailment of the photovoltaic power station, wherein the time type of power curtailment includes concentrated power curtailment and disordered power curtailment; Obtain power data of the PV power station, including AGC value, actual inverter power, theoretical inverter power, historical actual inverter power, and historical theoretical inverter power. Input the power data into the prediction model and use the prediction model to obtain the amount of abandoned light. Adjust the equipment of the photovoltaic power station according to the amount of abandoned light and the time of power curtailment; The amount of abandoned light includes the amount of abandoned light due to power restriction and the amount of abandoned light due to planned maintenance; The model for predicting the amount of curtailed solar power is as follows: ； The model for predicting the amount of abandoned light during planned maintenance is as follows: ； Among them, AGC is the target power for power limiting, is the actual sequential power of the inverter, agc is the target power of power restriction of the grid, t1 is the end time of power restriction, t0 is the opening time of power restriction, and P is the restored power; The restoration power P is obtained as follows: ； in is the inverter's historical theoretical timing power, is the actual historical sequential power of the inverter, is the theoretical timing power of the inverter.

2. The operation and maintenance adjustment method according to claim 1, characterized in that: The specific steps for adjusting the equipment in a PV power station based on the amount of abandoned solar power and the time and type of power curtailment are as follows: The sum of the curtailed solar power due to power restriction and the curtailed solar power due to planned maintenance is obtained as the total curtailed solar power. Determine whether the total amount of abandoned light is greater than the first threshold. If so, determine again whether the total amount of abandoned light is less than the second threshold. If so, adjust the equipment of the photovoltaic power station according to the time type of power restriction. If greater than the second threshold, send a detection signal.

3. The operation and maintenance adjustment method according to claim 2, characterized in that: The steps for adjusting the equipment of the photovoltaic power station according to the time and type of power restriction are as follows: When the power restriction time type is concentrated power restriction period, the power restriction period is obtained based on historical operation and maintenance data, and the device's working mode is changed to low energy consumption mode during the power restriction period; When the power restriction time type is the concentrated power restriction period type, the layout angle of the photovoltaic system components is adjusted.

4. An operation and maintenance adjustment system based on the amount of abandoned light in a photovoltaic power station, using the operation and maintenance adjustment method based on the amount of abandoned light in a photovoltaic power station according to any one of claims 1 to 3, characterized in that: It includes confirmation module, data acquisition module, prediction module and adjustment module; The confirmation module is used to obtain historical operation and maintenance data of the photovoltaic power station and determine the time and type of power restriction of the photovoltaic power station; The data acquisition module is used to acquire power data of the photovoltaic power station; The prediction module is used to input power data into the prediction model and obtain the amount of abandoned light through the prediction model; The adjustment module is used to adjust the equipment of the photovoltaic power station according to the amount of abandoned light and the time type of power restriction.

5. The operation and maintenance adjustment system according to claim 4, characterized in that: The adjustment module includes a first submodule and a judgment and processing submodule; The first submodule is used to obtain the sum of the power curtailment amount and the planned maintenance amount as the total curtailment amount; The judgment processing submodule is used to determine whether the total amount of abandoned light is greater than a first threshold. If so, it is again determined whether the total amount of abandoned light is less than a second threshold. If so, the equipment of the photovoltaic power station is adjusted according to the time type of power restriction. If so, a detection signal is issued.

6. The operation and maintenance adjustment system according to claim 5, characterized in that: The judgment processing submodule further includes a processing unit; The processing unit is configured to obtain a power restriction period based on historical operation and maintenance data when the power restriction time type is a concentrated power restriction period type, and change the working mode of the device to a low energy consumption mode during the power restriction period; When the power restriction time type is the concentrated power restriction period type, the layout angle of the photovoltaic system components is adjusted.

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