Photovoltaic power station management method and system

Abstract

The invention discloses a photovoltaic power station management method and system, and particularly relates to the field of management, and the system comprises a power station data acquisition module, a data processing module, a data analysis and calculation module, a safety value analysis and calculation module and a client control module. Illumination intensity, temperature, wind speed, generating capacity, voltage and current of a power station are collected, a loss value is obtained through calculation according to the illumination intensity, the temperature and the wind speed, then a characteristic value is obtained through calculation according to the generating capacity, the voltage and the current, and the loss value and the characteristic value are further analyzed and calculated to obtain a safety value. The safety value is compared with the preset safety threshold value, and whether the abnormal behavior is generated or not is analyzed according to the output result, so that the efficiency is greatly improved, the management cost and the frequency of human errors are reduced, and the power generation benefit and safety of the power station are improved.

Description

Technical Field

[0001] The present invention relates to the field of management technology, and more specifically, to a photovoltaic power station management method and system. Background Art

[0002] Photovoltaic power generation is a way of converting sunlight into electrical energy using the photoelectric effect. Photovoltaic power generation uses photovoltaic cells (also known as solar cells) to absorb the energy of sunlight and convert it into direct current electricity. This electricity can be used directly or converted to alternating current electricity through an inverter for home, commercial and industrial use.

[0003] However, there are still some shortcomings in its actual use. For example, the existing photovoltaic power generation system management method and system generally require manual inspection, monitoring equipment management and maintenance, and the management system is not intelligent and cannot achieve remote client control. Therefore, a photovoltaic power station management method and system came into being. Summary of the invention

[0004] In order to overcome the above-mentioned defects of the prior art, the embodiments of the present invention provide a photovoltaic power station management method and system to solve the problems raised in the above-mentioned background technology.

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

[0006] A1: By installing sensors and data acquisition equipment, various data of the photovoltaic power station are collected and monitored in real time;

[0007] A2: Process the collected data, including data cleaning and missing value supplementation;

[0008] A3: Analyze and calculate the processed data to obtain the loss value and characteristic value;

[0009] A4: Calculate the calculated loss value and characteristic value to get the safety value, then compare and judge the safety value after analysis and calculation to get the output instruction;

[0010] A5: The client receives the instruction and determines whether there is any abnormality in the power plant based on the output instruction; and implements measures based on different instructions.

[0011] Preferably, the sensors in step A1 include: a light sensor, a temperature sensor and a wind speed sensor; the data include light intensity, temperature, wind speed, power generation, voltage and current;

[0012] The specific steps of the wind speed sensor to collect wind speed are as follows:

[0013] Install the wind speed sensor: Place the wind speed sensor in a suitable place, avoiding any obstructions and allowing the wind speed sensor to be fully exposed to the air;

[0014] Connect the sensor: Connect the wind speed sensor to the data logger via a cable to transfer the measurement data;

[0015] Calibrate the sensor: Before taking actual measurements, the wind speed sensor needs to be calibrated and the sensor readings compared with those of a standard wind speed instrument to ensure the accuracy and reliability of its measurement results.

[0016] Start sensor: Start the wind speed sensor and start recording the wind speed data output by the sensor;

[0017] Read data: Use data acquisition equipment to read the wind speed data output by the sensor;

[0018] Analyze data: Analyze and process the collected wind speed data to obtain analyzed and processed wind speed data;

[0019] The steps of collecting voltage are specifically as follows:

[0020] Determine the monitoring points: First determine the voltage monitoring points of the power station that need to be monitored, and set up monitoring devices at important locations of the power station to ensure monitoring coverage of the entire power grid. The important locations are those that can monitor and cover the entire power grid.

[0021] Install sensors: Install voltage sensors at certain monitoring points. These sensors are usually devices specifically used to measure voltage. They can convert voltage values ​​into digital signals or analog signals and transmit them to data acquisition equipment.

[0022] Connecting to SCADA system: Connect the sensors to the PLC in the SCADA system. These devices are responsible for transmitting the data collected by the sensors to the SCADA system; PLC is a programmable logic controller;

[0023] Configure monitoring parameters: Configure the corresponding monitoring parameters in the SCADA system, including the location of the monitoring point, the type of sensor, the monitoring frequency and other information to ensure that the system can accurately collect and record voltage data.

[0024] Data transmission and storage: The collected voltage data is transmitted to the central database or data storage server through the SCADA system. These data will be used for real-time monitoring, historical data analysis and report generation.

[0025] Data processing and analysis: The collected voltage data is processed and analyzed in the data storage server and the data is transmitted to the client.

[0026] Real-time monitoring and alarm: The SCADA system can realize real-time monitoring of voltage. When abnormal values ​​or exceeding the preset range are detected, an alarm can be triggered to notify relevant personnel in time for processing;

[0027] The steps of collecting power generation are specifically as follows:

[0028] Install sensors and meters: Install current sensors, power meter sensors and meters on each generator set or transmission line of the power station. These devices will be used to measure the real-time current of the generator set and the power generated;

[0029] Connect to the automation control system: Connect the sensors and instruments to the input port of the automation control system. The automation control system usually has a dedicated input module to receive the power data collected by the sensor;

[0030] Configure measurement parameters: Configure the corresponding measurement parameters in the automation control system, such as the type of connected sensor, measurement range, sampling frequency, etc. Ensure that the system can accurately collect and record power generation data;

[0031] Real-time monitoring of power generation: Through the monitoring interface of the automation control system, the power generation data of each generator set can be viewed in real time; the system usually displays current power output, cumulative power generation and other information to facilitate monitoring and analysis by operation and maintenance personnel.

[0032] Data storage: The automated control system usually stores the collected power generation data in a database and sends the data to the client;

[0033] Set alarm function: When the power generation is lower than or exceeds the preset value, the system will automatically issue an alarm message to remind relevant personnel to handle it.

[0034] Preferably, in the data processing, the method of data cleaning is to eliminate abnormal values, the method of determining abnormal values ​​is the maximum value collected by each sensor, and the collected maximum value is greater than the preset threshold of each sensor, and the missing values ​​are supplemented by supplementing the abnormal values ​​eliminated after cleaning the above-mentioned transmitted data, and the supplemented missing values ​​are sorted in order from small to large for the collected data, and the median is taken as the missing value for supplementation.

[0035] Preferably, the loss value is calculated by: light intensity G, temperature T, wind speed V

[0036] Where S represents the loss value, G represents the light intensity, T represents the temperature, V represents the wind speed, α1, α2, α3 represent the weight factors, and γ represents other influencing factors;

[0037] The specific method for calculating the eigenvalue is:

[0038] P=U*I*F*δ, where P represents the characteristic value, U represents the voltage value, I represents the current value, F represents the power generation, and δ represents other influencing factors.

[0039] Preferably, the method for calculating the safety value by analyzing and calculating the calculated loss value and characteristic value is specifically as follows:

[0040] Q represents the safety value, S represents the loss value, P represents the characteristic value, and σ represents other influencing factors;

[0041] The safety value after analysis and calculation is compared with the preset safety threshold. If the safety value after analysis and calculation is greater than the preset safety threshold, a dangerous instruction is output; if the safety value after analysis and calculation is less than the preset safety threshold, a safe instruction is output; and the output instruction is sent to the client.

[0042] Preferably, when the client receives instructions, if the client receives a dangerous instruction, a professional is immediately arranged to correct it; if the client receives a safe instruction, it continues to monitor and maintain, and through a network connection, remote monitoring and control of the photovoltaic power station can be achieved, the operating status of the power station can be viewed in real time, and operations such as equipment regulation and parameter setting can be performed.

[0043] Technical effects and advantages of the present invention:

[0044] The present invention provides a photovoltaic power station management method and system. Various sensors are installed to collect the light intensity, temperature, wind speed, power generation, voltage and current of the photovoltaic power station, the light intensity, temperature and wind speed are calculated to obtain a loss value, and then the power generation, voltage and current are calculated to obtain a characteristic value. Finally, the calculated loss value and characteristic value are analyzed and calculated to obtain a safety value. Whether abnormal behavior occurs is judged by the calculated safety value and timely correction is made, which greatly improves efficiency, reduces management costs and the frequency of human errors, and helps to improve the power generation efficiency and safety of the power station. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 The figure is a flow chart of a photovoltaic power station management method of the present invention.

[0046] Figure 2 The figure is a schematic diagram of the connection of modules of a photovoltaic power station management system of the present invention. DETAILED DESCRIPTION

[0047] 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.

[0048] See also Figure 1 As shown, the present invention provides a photovoltaic power station management method, comprising the following steps:

[0049] A1: By installing sensors and data acquisition equipment, various data of the photovoltaic power station are collected and monitored in real time;

[0050] The sensors in step A1 include: a light sensor, a temperature sensor and a wind speed sensor; the data include light intensity, temperature, wind speed, power generation, voltage and current;

[0051] The specific steps of the light sensor to collect light intensity are:

[0052] Install the light sensor: Install the light sensor in the place where the light hours are the longest during the day to receive the light sensor;

[0053] Connect the sensor: Connect the light sensor to the light recorder to read the sensor output signal;

[0054] Calibrate the sensor: After the light sensor is installed and connected, it is then calibrated to ensure that the measured light intensity is accurate and stable. Calibration usually involves comparing the sensor readings with the readings of a standard measuring instrument under specific light conditions;

[0055] Reading data: After connection and calibration are completed, the data output by the light sensor is read through the data acquisition device to obtain information on light intensity;

[0056] The specific steps of the wind speed sensor to collect wind speed are as follows:

[0057] Install the wind speed sensor: Place the wind speed sensor in a suitable place, avoiding any obstructions and allowing the wind speed sensor to be fully exposed to the air;

[0058] Connect the sensor: Connect the wind speed sensor to the data logger via a cable to transfer the measurement data;

[0059] Calibrate the sensor: Before taking actual measurements, the wind speed sensor needs to be calibrated and the sensor readings compared with those of a standard wind speed instrument to ensure the accuracy and reliability of its measurement results.

[0060] Start sensor: Start the wind speed sensor and start recording the wind speed data output by the sensor;

[0061] Read data: Use data acquisition equipment to read the wind speed data output by the sensor;

[0062] Analyze data: Analyze and process the collected wind speed data to obtain analyzed and processed wind speed data.

[0063] The steps of collecting voltage are specifically as follows:

[0064] Determine the monitoring points: First determine the voltage monitoring points of the power station that need to be monitored, and set up monitoring devices at important locations of the power station to ensure monitoring coverage of the entire power grid. The important locations are those that can monitor and cover the entire power grid.

[0065] Install sensors: Install voltage sensors at certain monitoring points. These sensors are usually devices specifically used to measure voltage. They can convert voltage values ​​into digital signals or analog signals and transmit them to data acquisition equipment.

[0066] Connecting to SCADA system: Connect the sensors to the PLC in the SCADA system. These devices are responsible for transmitting the data collected by the sensors to the SCADA system; PLC is a programmable logic controller;

[0067] Configure monitoring parameters: Configure the corresponding monitoring parameters in the SCADA system, including the location of the monitoring point, the type of sensor, the monitoring frequency and other information to ensure that the system can accurately collect and record voltage data.

[0068] Data transmission and storage: The collected voltage data is transmitted to the central database or data storage server through the SCADA system. These data will be used for real-time monitoring, historical data analysis and report generation.

[0069] Data processing and analysis: The collected voltage data is processed and analyzed in the data storage server and the data is transmitted to the client.

[0070] Real-time monitoring and alarm: The SCADA system can realize real-time monitoring of voltage. When abnormal values ​​or exceeding the preset range are detected, an alarm can be triggered to notify relevant personnel in time for processing;

[0071] The steps of collecting power generation are specifically as follows:

[0072] Install sensors and meters: Install current sensors, power meter sensors and meters on each generator set or transmission line of the power station. These devices will be used to measure the real-time current of the generator set and the power generated;

[0073] Connect to the automation control system: Connect the sensors and instruments to the input port of the automation control system. The automation control system usually has a dedicated input module to receive the power data collected by the sensor;

[0074] Configure measurement parameters: Configure the corresponding measurement parameters in the automation control system, such as the type of connected sensor, measurement range, sampling frequency, etc. Ensure that the system can accurately collect and record power generation data;

[0075] Real-time monitoring of power generation: Through the monitoring interface of the automation control system, the power generation data of each generator set can be viewed in real time; the system usually displays current power output, cumulative power generation and other information to facilitate monitoring and analysis by operation and maintenance personnel.

[0076] Data storage: The automated control system usually stores the collected power generation data in a database and sends the data to the client;

[0077] Set alarm function: When the power generation is lower than or exceeds the preset value, the system will automatically issue an alarm message to remind relevant personnel to handle it.

[0078] A2: Process the collected data, including data cleaning and missing value supplementation;

[0079] In the data processing, the method of data cleaning is to eliminate abnormal values. The method of determining abnormal values ​​is the maximum value collected by each sensor, and the collected maximum value is greater than the preset threshold of each sensor. The missing values ​​are supplemented by supplementing the abnormal values ​​eliminated after the above-mentioned transmitted data is cleaned. The supplemented missing values ​​are sorted in order from small to large for the collected data, and the median is taken as the missing value for supplementation.

[0080] A3: Analyze and calculate the processed data to obtain the loss value and characteristic value;

[0081] The calculation method of the loss value is specifically as follows: light intensity G, temperature T, wind speed V

[0082] Where S represents the loss value, G represents the light intensity, T represents the temperature, V represents the wind speed, α1, α2, α3 represent the weight factors, and γ represents other influencing factors;

[0083] The specific method for calculating the eigenvalue is:

[0084] P=U*I*F*δ, where P represents the characteristic value, U represents the voltage value, I represents the current value, F represents the power generation, and δ represents other influencing factors.

[0085] A4: Calculate the calculated loss value and characteristic value to get the safety value, then compare and judge the safety value after analysis and calculation to get the output instruction; judge whether there is an abnormality in the power station according to the output instruction;

[0086] The specific calculation method of analyzing and calculating the calculated loss value and characteristic value to obtain the safety value is:

[0087] Q represents the safety value, S represents the loss value, P represents the characteristic value, and σ represents other influencing factors;

[0088] The safety value after analysis and calculation is compared with the preset safety threshold. If the safety value after analysis and calculation is greater than the preset safety threshold, a dangerous instruction is output; if the safety value after analysis and calculation is less than the preset safety threshold, a safe instruction is output; and the output instruction is sent to the client

[0089] A5: The client receives instructions and implements measures according to different instructions;

[0090] When the client receives instructions, if the client receives a dangerous instruction, a professional person will be arranged to correct it immediately; if the client receives a safe instruction, it will continue to monitor and maintain, and through the network connection, remote monitoring and control of the photovoltaic power station can be achieved. The operating status of the power station can be viewed in real time, and equipment regulation and parameter setting and other operations can be performed.

[0091] It should be noted that the preset values ​​in the present invention are determined according to specific circumstances, that is, this embodiment does not specifically limit the specific values.

[0092] See also Figure 2 As shown, in this embodiment, it should be specifically explained that the present invention provides a photovoltaic power station management system, including the following modules:

[0093] Power station data acquisition module: used to collect and monitor various data of photovoltaic power stations in real time by installing sensors and data acquisition equipment;

[0094] Data processing module: used to process the collected data, including data cleaning and missing value supplementation;

[0095] Data analysis and calculation module: used to analyze and calculate the cleaned data to obtain loss values ​​and eigenvalues;

[0096] Safety value calculation and analysis module: used to calculate the calculated loss value and characteristic value to obtain the safety value, and then compare the safety value after analysis and calculation to obtain the output instruction; according to the output instruction, it is judged whether there is an abnormal situation in the power station;

[0097] Client control module: used for the client to receive the output instructions in the safety value calculation and analysis module, and implement measures according to different instructions. Through network connection, it can realize remote monitoring and control of photovoltaic power stations, view the operating status of power stations in real time, and perform equipment regulation and parameter setting and other operations.

[0098] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A photovoltaic power station management method, characterized in that: include: A1: By installing sensors and data acquisition equipment, various data of the photovoltaic power station are collected and monitored in real time; A2: Process the collected data, including data cleaning and missing value supplementation; A3: Analyze and calculate the processed data to obtain the loss value and characteristic value; A4: Calculate the calculated loss value and characteristic value to get the safety value, then compare and judge the safety value after analysis and calculation to get the output instruction; A5: The client receives the instruction and determines whether there is any abnormality in the power plant based on the output instruction; and implements measures based on different instructions.

2. A photovoltaic power station management method according to claim 1, characterized in that: The sensors in step A1 include: a light sensor, a temperature sensor and a wind speed sensor; the data include light intensity, temperature, wind speed, power generation, voltage and current; The specific steps of the wind speed sensor to collect wind speed are as follows: Install the wind speed sensor: Place the wind speed sensor in a suitable place, avoiding any obstructions and allowing the wind speed sensor to be fully exposed to the air; Connect the sensor: Connect the wind speed sensor to the data logger via a cable to transfer the measurement data; Calibrate the sensor: Before taking actual measurements, the wind speed sensor needs to be calibrated and the sensor readings compared with those of a standard wind speed instrument to ensure the accuracy and reliability of its measurement results. Start sensor: Start the wind speed sensor and start recording the wind speed data output by the sensor; Read data: Use data acquisition equipment to read the wind speed data output by the sensor; Analyze data: Analyze and process the collected wind speed data to obtain analyzed and processed wind speed data.

3. A photovoltaic power station management method according to claim 1, characterized in that: In the data processing, the method of data cleaning is to eliminate abnormal values. The method of determining abnormal values ​​is the maximum value collected by each sensor, and the collected maximum value is greater than the preset threshold of each sensor. The missing values ​​are supplemented by supplementing the abnormal values ​​eliminated after the above-mentioned transmitted data is cleaned. The supplemented missing values ​​are sorted in order from small to large for the collected data, and the median is taken as the missing value for supplementation.

4. A photovoltaic power station management method according to claim 1, characterized in that: The calculation method of the loss value is specifically as follows: light intensity G, temperature T, wind speed V Where S represents the loss value, G represents the light intensity, T represents the temperature, V represents the wind speed, α1, α2, α3 represent the weight factors, and γ represents other influencing factors; The specific method for calculating the eigenvalue is: P=U*I*F*δ, where P represents the characteristic value, U represents the voltage value, I represents the current value, F represents the power generation, and δ represents other influencing factors.

5. A photovoltaic power station management method according to claim 1, characterized in that: The specific calculation method of analyzing and calculating the calculated loss value and characteristic value to obtain the safety value is: Q represents the safety value, S represents the loss value, P represents the characteristic value, and σ represents other influencing factors; The safety value after analysis and calculation is compared with the preset safety threshold. If the safety value after analysis and calculation is greater than the preset safety threshold, a dangerous instruction is output; if the safety value after analysis and calculation is less than the preset safety threshold, a safe instruction is output; and the output instruction is sent to the client.

6. A photovoltaic power station management method according to claim 1, characterized in that: When the client receives instructions, if the client receives a dangerous instruction, a professional person will be arranged to correct it immediately; if the client receives a safe instruction, it will continue to monitor and maintain, and through the network connection, remote monitoring and control of the photovoltaic power station can be achieved. The operating status of the power station can be viewed in real time, and equipment regulation and parameter setting and other operations can be performed.

7. A photovoltaic power station management system according to claim 1, using a photovoltaic power station management method according to any one of claims 1 to 6, characterized in that: Power station data acquisition module: used to collect and monitor various data of photovoltaic power stations in real time by installing sensors and data acquisition equipment; Data processing module: used to process the collected data, including data cleaning and missing value supplementation; Data analysis and calculation module: used to analyze and calculate the cleaned data to obtain loss values ​​and characteristic values; Safety value calculation and analysis module: used to calculate the calculated loss value and characteristic value to obtain the safety value, and then compare the safety value after analysis and calculation to obtain the output instruction; according to the output instruction, it is judged whether there is an abnormal situation in the power station; Client control module: used for the client to receive the output instructions in the safety value calculation and analysis module, and implement measures according to different instructions. Through network connection, it can realize remote monitoring and control of photovoltaic power stations, view the operating status of power stations in real time, and perform equipment regulation and parameter setting and other operations.

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