Operation and maintenance adjustment method and system based on light abandoning amount of photovoltaic power station

Abstract

An operation and maintenance adjustment method based on the light abandoning amount of a photovoltaic power station comprises the following steps: obtaining historical operation and maintenance data of the photovoltaic power station, and determining the power limiting time type of the photovoltaic power station; obtaining power data of the photovoltaic power station, wherein the power data comprises an AGC value, inverter actual time sequence power, inverter theoretical time sequence power, inverter historical actual time sequence power and inverter historical theoretical time sequence power; inputting the power data into a prediction model, and obtaining a light abandoning amount through the prediction model; and adjusting the equipment of the photovoltaic power station according to the light abandoning amount and the power limiting time type. Through the analysis of the light abandoning amount and the power limitation, the method plays an important role in the aspects of power supply and demand balance, energy planning, energy conservation and emission reduction, emergency response, evaluation effect and the like, and facilitates the realization of sustainable energy development and power supply stability in the 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 according to 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, due to the influence of abandoned solar power, the power of photovoltaic power stations is difficult to predict. Abandoned solar power in photovoltaic power stations refers to the phenomenon that when solar energy resources are abundant, some solar energy resources cannot be effectively utilized and are wasted due to reasons such as excess capacity of photovoltaic power stations or unreasonable system design. The amount of abandoned solar power affects the prediction and evaluation of the power supply capacity of photovoltaic power stations, thereby affecting the prediction results of potential power supply shortages or surpluses, and ultimately leads to an increase in the operation and maintenance costs of power-restricted photovoltaic power stations. Summary of the invention

[0004] In view of the above-mentioned defects, the object of the present invention is to provide an operation and maintenance adjustment method and system according to 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 the photovoltaic power station and determine the time and type of power cuts of the photovoltaic power station;

[0007] Obtain the power data of the photovoltaic power station, where the power data includes AGC value, actual sequential power of the inverter, theoretical sequential power of the inverter, historical actual sequential power of the inverter, and historical theoretical sequential power of the inverter;

[0008] Input the power data into the prediction model and obtain the amount of abandoned light through the prediction model;

[0009] The equipment of the photovoltaic power station is adjusted according to the amount of abandoned light and the time 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 curtailment and abandonment 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 power limit target power, P c is the actual sequential power of the inverter, agc is the target power of power restriction of the power grid, t1 is the end time of power restriction, t0 is the start time of power restriction, and P is the restored power;

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

[0017]

[0018] Where P th is the inverter 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 time type.

[0020] Preferably, the specific steps of 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] Get the sum of the power curtailment amount and the planned maintenance amount as the total curtailment amount;

[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 type of power restriction time. If greater than the second threshold, send a detection signal.

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

[0024] When the power-limiting time type is the concentrated power-limiting period type, the power-limiting period is obtained according to the historical operation and maintenance data, and the working mode of the equipment is changed to the low-energy consumption mode during the power-limiting period;

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

[0026] An operation and maintenance adjustment system according to the amount of abandoned light in a photovoltaic power station, using the operation and maintenance adjustment method according to 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 the historical operation and maintenance data of the photovoltaic power station and determine the time 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 the power data into the prediction model, and obtain the abandoned light amount through the prediction model;

[0030] The regulating module is used to regulate 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-limited abandoned light amount and the planned maintenance abandoned light amount as the total abandoned light amount;

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

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

[0035] The processing unit is used for obtaining the power restriction period according to the historical operation and maintenance data when the power restriction time type is the concentrated power restriction period type, and changing the working mode of the equipment to the low energy consumption mode during the power restriction period;

[0036] When the time type of power restriction is concentrated during power restriction period, the layout angle of 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 schematic diagram of the structure of an embodiment of the system of the present invention. DETAILED DESCRIPTION

[0040] The embodiments of the present invention are described in detail below, and 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 from beginning to end. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood 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 are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0042] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

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

[0044] Obtain historical operation and maintenance data of the photovoltaic power station and determine the time and type of power cuts of the photovoltaic power station;

[0045] Obtain the power data of the photovoltaic power station, where the power data includes AGC value, actual sequential power of the inverter, theoretical sequential power of the inverter, historical actual sequential power of the inverter, and historical theoretical sequential power of the inverter;

[0046] Input the power data into the prediction model and obtain the amount of abandoned light through the prediction model;

[0047] The equipment of the photovoltaic power station is adjusted according to the amount of abandoned light and the time 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 curtailment and abandonment 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 power limit target power, P c is the actual sequential power of the inverter, agc is the target power of power restriction of the power grid, t1 is the end time of power restriction, t0 is the start time of power restriction, and P is the restored power;

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

[0055]

[0056] Where P th is the inverter 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] For the amount of curtailment of power, it specifically refers to the unified dispatch of the power grid to limit the power generation, even if the light resources are abundant, it does not satisfy the distribution of power generation. The power grid has a fixed parameter called AGC. When the AGC decreases and the restored power is higher than the AGC, it can be considered that power curtailment has occurred. The power difference and the power curtailment time are integrated to obtain the amount of curtailment of light power generation, in kw / h. Planned maintenance means that even if there are still light resources at this moment, power generation is stopped. When the restored power can still occur and the actual power is 0, it is considered to be the amount of planned maintenance and curtailment of light, in km / h. The advantage of this model is that the restored power is introduced for judgment, because there is a situation where the agc decreases but there is no power curtailment in fact, it is just a simple grid dispatch behavior. The restored power can be considered as the accurate value of the power that should be generated at this moment, which is more accurate than the theoretical power. At the same time, real-time calculation can be performed, and real-time monitoring can be performed through the on-duty platform, which is conducive to the configuration of power generation plans.

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

[0059] Preferably, the specific steps of 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] Get the sum of the power curtailment amount and the planned maintenance amount as the total curtailment amount;

[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 type of power restriction time. If greater than the second threshold, send a detection signal.

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

[0063] When the power-limiting time type is the concentrated power-limiting period type, the power-limiting period is obtained according to the historical operation and maintenance data, and the working mode of the equipment is changed to the low-energy consumption mode during the power-limiting period;

[0064] When the time type of power restriction is concentrated during power restriction period, the layout angle of photovoltaic system components is adjusted.

[0065] In the present invention, the operation and maintenance data of the photovoltaic power station is first obtained, wherein the operation and maintenance data records the equipment operation mode of the photovoltaic power station at different time points. This includes the time of power-limited operation, the time of high energy consumption operation, and so on. The limited time type of the photovoltaic power station can be determined by the historical operation and maintenance data of the previous month. Preferably, the power-limited time type includes a concentrated power-limited period type and an unordered power-limited time type. Among them, the concentrated power-limited period type means that in the historical operation and maintenance data of one month, 70% of the power-limited time is fixed within a certain range. For example, a photovoltaic power station has 25 days of power-limited time concentrated between 6 and 7 o'clock in a month. At this time, the power-limited time type of the photovoltaic power station can be determined as a concentrated power-limited period type. On the contrary, the remaining cases can be identified as unordered power-limited time types.

[0066] Then, the power data of the photovoltaic power station is collected and input into the corresponding model to obtain the amount of abandoned light. In the present invention, the operating state of the equipment is adjusted according to the amount of abandoned light and the time type of power restriction.

[0067] For example, when the amount of abandoned light is greater than the second threshold, this means that the amount of abandoned light of this degree will affect the normal operation of the photovoltaic power station. At this time, a detection signal needs to be sent, and the staff will inspect and repair the photovoltaic power generation device according to the detection signal. When the amount of abandoned light is less than the second threshold and greater than the first threshold, the amount of abandoned light of this degree affects the operation and maintenance cost of the photovoltaic power station. For this reason, the equipment of the photovoltaic power station can be adjusted according to the time type of power restriction. When the time type of power restriction is the concentrated type of power restriction period, since the power restriction time of the power station is concentrated at this time, the operation mode of the equipment can be adjusted to energy-saving or low-energy consumption mode during the power restriction time, while reducing costs and ensuring the normal operation of the photovoltaic power station. When the concentrated type of power restriction period is the disordered type of power restriction time, since the power restriction time cannot be determined, if the operation mode of the equipment is changed at will, it will affect the operation of the photovoltaic power station. For this reason, when encountering this situation, the layout angle of the photovoltaic system components in the photovoltaic power station can be adjusted. The layout angle of the photovoltaic components directly affects its efficiency in receiving solar radiation. The position of the sun is constantly changing, and the layout angle of the photovoltaic components determines whether it can face the sun to the maximum extent, thereby receiving more solar radiation. By adjusting the layout angle of photovoltaic modules to optimally match the sun's incident angle, the power generation efficiency of photovoltaic modules can be significantly improved, thereby reducing the amount of abandoned light and ensuring the normal operation of photovoltaic power stations.

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

[0069] An operation and maintenance adjustment system according to the amount of abandoned light in a photovoltaic power station, using the operation and maintenance adjustment method according to 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 the historical operation and maintenance data of the photovoltaic power station and determine the time 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 the power data into the prediction model, and obtain the abandoned light amount through the prediction model;

[0073] The regulating module is used to regulate 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-limited abandoned light amount and the planned maintenance abandoned light amount as the total abandoned light amount;

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

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

[0078] The processing unit is used for obtaining the power restriction period according to the historical operation and maintenance data when the power restriction time type is the concentrated power restriction period type, and changing the working mode of the equipment to the low energy consumption mode during the power restriction period;

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

[0080] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0081] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An operation and maintenance adjustment method 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 and type of power cuts of the photovoltaic power station; Obtain the power data of the photovoltaic power station, where the power data includes AGC value, actual sequential power of the inverter, theoretical sequential power of the inverter, historical actual sequential power of the inverter, and historical theoretical sequential power of the inverter; Input the power data into the prediction model and obtain the amount of abandoned light through the prediction model; The equipment of the photovoltaic power station is adjusted according to the amount of abandoned light and the time of power restriction.

2. The operation and maintenance adjustment method according to claim 1, characterized in that: The abandoned light amount includes the abandoned light amount due to power shortage and the abandoned light amount due to planned maintenance; The model for predicting the amount of curtailment and abandonment is as follows: The model for predicting the amount of abandoned light during planned maintenance is as follows: Where AGC is the power limit target power, P c is the actual sequential power of the inverter, agc is the target power of power restriction of the power grid, t1 is the end time of power restriction, t0 is the start time of power restriction, and P is the restored power; The restoration power P is obtained as follows: Where P th is the inverter 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.

3. The operation and maintenance adjustment method according to claim 2 is characterized in that: The time types of power restriction include concentrated power restriction period type and disordered power restriction time type.

4. The operation and maintenance adjustment method according to claim 3 based on the amount of abandoned light in a photovoltaic power station is characterized in that: The specific steps for adjusting the equipment of the photovoltaic power station according to the amount of abandoned light and the time of power restriction are as follows: Get the sum of the power curtailment amount and the planned maintenance amount as the total curtailment amount; 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 type of power restriction time. If greater than the second threshold, send a detection signal.

5. The operation and maintenance adjustment method according to claim 4 based on the amount of abandoned light in a photovoltaic power station is characterized in that: The steps to adjust the equipment of the photovoltaic power station according to the time type of power restriction are as follows: When the power-limiting time type is the concentrated power-limiting period type, the power-limiting period is obtained according to the historical operation and maintenance data, and the working mode of the equipment is changed to the low-energy consumption mode during the power-limiting period; When the time type of power restriction is concentrated during power restriction period, the layout angle of photovoltaic system components is adjusted.

6. An operation and maintenance adjustment system according to the amount of abandoned light in a photovoltaic power station, using an operation and maintenance adjustment method according to the amount of abandoned light in a photovoltaic power station as claimed in any one of claims 1 to 5, characterized in that: It includes a confirmation module, a data acquisition module, a prediction module and an adjustment module; The confirmation module is used to obtain the historical operation and maintenance data of the photovoltaic power station and determine the time 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 the power data into the prediction model, and obtain the abandoned light amount through the prediction model; The regulating module is used to regulate the equipment of the photovoltaic power station according to the amount of abandoned light and the time type of power restriction.

7. The operation and maintenance adjustment system according to claim 6, characterized in that: The adjustment module includes a first submodule and a judgment processing submodule; The first submodule is used to obtain the sum of the power-limited abandoned light amount and the planned maintenance abandoned light amount as the total abandoned light amount; The judgment processing submodule is used to judge whether the total amount of abandoned light is greater than a first threshold value. If it is greater than the first threshold value, it is judged again whether the total amount of abandoned light is less than a second threshold value. If it is less than the second threshold value, the equipment of the photovoltaic power station is adjusted according to the time type of power restriction. If it is greater than the second threshold value, a detection signal is sent.

8. The operation and maintenance adjustment system according to claim 7, characterized in that: The judgment processing submodule also includes a processing unit; The processing unit is used for obtaining the power restriction period according to the historical operation and maintenance data when the power restriction time type is the concentrated power restriction period type, and changing the working mode of the equipment to the low energy consumption mode during the power restriction period; When the time type of power restriction is concentrated during power restriction period, the layout angle of photovoltaic system components is adjusted.

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