Active voltage cooperative control method and system of optical storage integrated generator

Abstract

The invention belongs to the technical field of power distribution networks, and provides an active voltage cooperative control method and system for an optical storage integrated generator, and the technical scheme is as follows: analyzing theoretical data of a power transmission line to obtain a theoretical characteristic value of the power transmission line, and determining a target characteristic value of the power transmission line based on the theoretical characteristic value of the power transmission line; analyzing the acquired actual condition data set of the power transmission line to obtain an actual characteristic value of the power transmission line, and determining a reactive power adjustment characteristic value of the power transmission line in combination with the target characteristic value of the power transmission line; analyzing the state of the light-storage integrated generator to obtain a state characteristic value of the light-storage integrated generator, and determining a reactive power reference adjustment characteristic value of the power transmission line based on the state characteristic value of the light-storage integrated generator; and comparing the power transmission line reactive power adjustment characteristic value with the power transmission line reactive power reference adjustment characteristic value, and determining a power transmission line reactive power adjustment scheme according to a comparison result. Light storage resources can be utilized to the maximum for adjustment, and dependence on a traditional generator set is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of power distribution networks, and in particular relates to an active voltage coordinated control method and system for a photovoltaic-storage integrated generator. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] With the growing demand for renewable energy, the rapid development of photovoltaic power generation and energy storage technology has provided a sustainable energy solution for the power system. Photovoltaic power generation is intermittent and volatile due to the influence of environmental factors such as weather and day and night, which will bring challenges to the voltage stability and frequency regulation of the power grid. The integrated photovoltaic and energy storage generator combines photovoltaic power generation and energy storage system, which can effectively alleviate the instability of photovoltaic power generation, and provide electricity during peak hours and store electricity during low hours through the energy storage system. In practical applications, how to maintain the stability of the grid voltage is still a technical problem, especially when the distributed power generation system is connected to the main power grid, the voltage regulation problem is particularly prominent. In the photovoltaic and energy storage integrated system, the energy storage equipment can actively participate in voltage regulation by quickly responding to and adjusting the reactive power output. The core issue of studying the active voltage cooperative control system is how to enable the photovoltaic storage system to maintain voltage stability and reduce voltage fluctuations through precise reactive power management when the grid load changes.

[0004] There are still some deficiencies in the existing research on active voltage coordinated control of photovoltaic and storage integrated generators, which are specifically reflected in the insufficient dynamic response capability of active voltage coordinated control of traditional photovoltaic and storage integrated generators. When the state of the photovoltaic and storage integrated generator does not meet the adjustment requirements of the transmission line, the compensation adjustment capability analysis is not comprehensive enough. When the dynamic response capability of the photovoltaic and storage integrated generator is insufficient, the system cannot quickly adjust the output reactive power based on the actual situation, resulting in untimely voltage regulation, which may further cause local voltage instability or even voltage collapse. The power grid has very high requirements for stable operation, especially during peak load periods. Untimely dynamic response may cause serious power accidents. When the state of the photovoltaic and storage integrated generator does not match the transmission line requirements, if the compensation adjustment capability is insufficient, the system cannot effectively analyze and adjust the voltage and reactive power in the transmission line, resulting in the failure to solve the voltage control and reactive power balance problems of the transmission line, which may cause overload or frequent failures of the line in severe cases. Summary of the invention

[0005] In order to solve at least one technical problem existing in the above-mentioned background technology, the present invention provides an active voltage coordinated control method and system of a photovoltaic-storage integrated generator, which maximizes the use of photovoltaic-storage resources for regulation and reduces dependence on traditional generator sets.

[0006] In order to achieve the above object, the present invention adopts the following technical solution: A first aspect of the present invention provides an active voltage coordinated control method for a photovoltaic-storage integrated generator, comprising the following steps: Analyze theoretical data of the transmission line to obtain theoretical characteristic values ​​of the transmission line, and determine target characteristic values ​​of the transmission line based on the theoretical characteristic values ​​of the transmission line; Analyze the actual situation data set of the acquired transmission line to obtain the actual characteristic value of the transmission line, and determine the reactive power adjustment characteristic value of the transmission line in combination with the target characteristic value of the transmission line; Analyze the state of the photovoltaic integrated generator to obtain the photovoltaic integrated generator state characteristic value, and determine the transmission line reactive power reference adjustment characteristic value based on the photovoltaic integrated generator state characteristic value; The reactive power adjustment characteristic value of the transmission line is compared with the reactive power reference adjustment characteristic value of the transmission line. When the state of the integrated photovoltaic and storage generator does not meet the adjustment requirements of the transmission line, the standby generator set is enabled. The reactive power adjustment scheme of the transmission line is determined by combining the reactive power adjustment characteristic value, the reactive power reference adjustment characteristic value and the standby generator set to achieve coordinated control.

[0007] Furthermore, the calculation formula of the theoretical characteristic value of the transmission line is: , in, is the theoretical characteristic value of the transmission line, is the total length of the transmission line, is the cross-sectional area of ​​the transmission line conductor, is the current capacity of the transmission line conductor, For setting The compensation factor, For setting The compensation factor, For setting compensation factor.

[0008] Furthermore, the calculation formula of the actual characteristic value of the transmission line is: , in, is the actual characteristic value of the transmission line, is the transmission line voltage, is the transmission line power factor, is the transmission line resistance, is the arc discharge frequency of the transmission line, For setting The compensation factor, For setting The compensation factor, For setting The compensation factor, For setting compensation factor.

[0009] Furthermore, the process of determining the reactive power adjustment characteristic value of the transmission line includes: The actual characteristic value of the transmission line is stored as a first designated tag, and the first designated tag is compared with the transmission line adjustment characteristic value corresponding to each designated tag stored in the database to obtain the transmission line adjustment characteristic value corresponding to the first designated tag; The difference between the transmission line adjustment characteristic value and the transmission line target characteristic value is recorded as the transmission line target deviation value; The transmission line target deviation value is stored as a second designated tag, and the second designated tag is compared with the transmission line reactive power adjustment characteristic value corresponding to each designated tag stored in the database to obtain the transmission line reactive power adjustment characteristic value corresponding to the second designated tag.

[0010] Furthermore, the calculation formula of the state characteristic value of the photovoltaic energy storage integrated generator is: , in, is the state characteristic value of the photovoltaic-storage integrated generator, The power generated by the photovoltaic and energy storage integrated generator, The light intensity received by the integrated photovoltaic and energy storage generator, The working efficiency of photovoltaic modules of the integrated photovoltaic storage generator is The battery capacity of the photovoltaic and energy storage integrated generator. For setting The compensation factor, For setting The compensation factor, For setting The compensation factor, For setting compensation factor.

[0011] Further, the comparison of the reactive power adjustment characteristic value of the transmission line and the reactive power reference adjustment characteristic value of the transmission line is compared, and the reactive power adjustment scheme of the transmission line is determined according to the comparison result, including: The difference between the reference adjustment characteristic value and the adjustment characteristic value of the reactive power of the transmission line is recorded as the reactive power adjustment characteristic difference of the transmission line. If the difference is positive, the state of the integrated photovoltaic and storage generator meets the adjustment requirements of the transmission line. If the difference is not positive, the state of the integrated photovoltaic and storage generator does not meet the adjustment requirements of the transmission line.

[0012] Furthermore, if the state of the photovoltaic-storage integrated generator meets the transmission line adjustment demand, the transmission line reactive power adjustment characteristic value is stored as a third designated tag, and the third designated tag is compared with the transmission line reactive power adjustment schemes corresponding to each designated tag stored in the database to obtain the transmission line reactive power adjustment scheme corresponding to the third designated tag; If the state of the integrated photovoltaic and storage generator does not meet the transmission line adjustment requirements, the standby generator set is activated, and the transmission line reactive power reference adjustment characteristic value and the transmission line reactive power adjustment characteristic value are imported into the standby generator set activation model to obtain the standby generator set activation characteristic value; the standby generator set activation characteristic value is stored as a fourth designated tag, and the fourth designated tag is compared with the transmission line reactive power adjustment schemes corresponding to the designated tags stored in the database to obtain the transmission line reactive power adjustment scheme corresponding to the fourth designated tag.

[0013] The second aspect of the present invention provides an active voltage coordination control system for a photovoltaic and energy storage integrated generator, comprising: A target characteristic value determination module is used to analyze theoretical data of the transmission line to obtain theoretical characteristic values ​​of the transmission line, and determine target characteristic values ​​of the transmission line based on the theoretical characteristic values ​​of the transmission line; The adjustment characteristic value determination module is used to analyze the actual situation data set of the acquired transmission line to obtain the actual characteristic value of the transmission line, and determine the reactive power adjustment characteristic value of the transmission line in combination with the target characteristic value of the transmission line; A reference adjustment characteristic value determination module is used to analyze the state of the photovoltaic integrated generator and obtain the characteristic value of the photovoltaic integrated generator state, and determine the reference adjustment characteristic value of the reactive power of the transmission line based on the characteristic value of the photovoltaic integrated generator state; The adjustment scheme determination module is used to compare the reactive power adjustment characteristic value of the transmission line with the reactive power reference adjustment characteristic value of the transmission line. When the state of the integrated photovoltaic and storage generator does not meet the adjustment requirements of the transmission line, the standby generator set is enabled, and the reactive power adjustment scheme of the transmission line is determined by combining the reactive power adjustment characteristic value, the reactive power reference adjustment characteristic value and the standby generator set to achieve coordinated control.

[0014] A third aspect of the present invention provides a computer-readable storage medium.

[0015] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of the active voltage coordinated control method of a photovoltaic-storage integrated generator as described above.

[0016] A fourth aspect of the present invention provides a computer device.

[0017] A computer device comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the steps in the active voltage coordinated control method of a photovoltaic-storage integrated generator as described above are implemented.

[0018] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention provides an active voltage coordinated control system for a photovoltaic and energy storage integrated generator. By comparing the actual situation analysis module of the transmission line with the target characteristic value, the demand for reactive power adjustment can be quickly determined, and the adjustment process can be dynamically optimized according to the actual working conditions. The participation of the photovoltaic and energy storage generator in the reactive power adjustment of the transmission line improves the flexibility and responsiveness of the system. The system can maximize the use of photovoltaic and energy storage resources for adjustment and reduce dependence on traditional generator sets.

[0019] 2. The present invention obtains the characteristic value of the transmission line by analyzing the actual situation of the transmission line, determines the reactive power adjustment characteristic value of the transmission line in combination with the target characteristic value of the transmission line, and analyzes the real-time operation status of the transmission line. The system can understand the specific operation status of the current transmission line. In combination with the preset target characteristic value, the required reactive power adjustment amount can be determined more accurately, the flexibility and response speed of system regulation can be improved, and the regulation effect can be ensured to be consistent with actual needs. Adjusting the reactive power based on the comprehensive analysis of the actual situation and the target value can effectively avoid the system instability caused by voltage fluctuations, especially when the load fluctuations are large, and the regulation ability is stronger.

[0020] 3. When the status of the photovoltaic power generator cannot meet the reactive power adjustment requirements of the transmission line, the system can automatically enable the standby generator set to ensure that the standby generator is put into use based on the precise reactive power adjustment requirements to avoid over- or under-regulation.

[0021] Advantages of additional aspects of the present invention will be given in part in the following description, and in part will become obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0023] Figure 1 It is a flow chart of the active voltage coordinated control method of the photovoltaic and energy storage integrated generator provided by an embodiment of the present invention; Figure 2 It is a flow chart of a method for determining whether the state of a photovoltaic integrated power generator meets the transmission line adjustment requirements provided by an embodiment of the present invention; Figure 3is a graph showing a change in a characteristic value of a standby generator set being enabled along with a reactive power reference adjustment characteristic value of a transmission line provided by an embodiment of the present invention; Figure 4 It is a graph showing the change of the activation characteristic value of the standby generator set along with the reactive power adjustment characteristic value of the transmission line provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0024] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0025] It should be noted that the following detailed descriptions are all illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0026] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0027] Embodiment 1 This embodiment provides an active voltage coordinated control method for a photovoltaic-storage integrated generator, comprising the following steps: Step 1: Obtain the basic information dataset of the transmission line; In this embodiment, the basic information of the transmission line includes the total length of the transmission line, the cross-sectional area of ​​the transmission line conductor, and the current capacity of the transmission line conductor.

[0028] The total length of a transmission line refers to the physical length of the transmission line from its starting point to its end point. The total length of a transmission line affects the efficiency of power transmission and the voltage loss on the line. Long-distance transmission may require a higher voltage to reduce energy loss. The total length of a transmission line is usually obtained through a geographic information system (GIS); The cross-sectional area of ​​the transmission line conductor determines the maximum current (current capacity) it can withstand. The larger the cross-sectional area, the smaller the resistance of the conductor, which can more effectively transmit more current and reduce heat loss. The conductor cross-sectional area is usually provided by the manufacturer during the design and manufacturing stage of the transmission line; The current capacity of a transmission line conductor refers to the maximum current value that the conductor can safely carry. Exceeding this value may cause the conductor to overheat or even be damaged. The current capacity depends on the conductor's material, cross-sectional area, and environmental conditions. An ammeter (such as a clamp ammeter) is used to actually measure the current in the transmission line.

[0029] It should be noted that the current capacity of the above-mentioned wires is mainly determined by their cross-sectional area. The larger the cross-sectional area, the more current the wire can carry, because a larger cross-section can help disperse heat and reduce heat loss and potential damage caused by current overload. The line length itself does not directly determine the current capacity, but it indirectly affects the effective current carrying capacity of the line by increasing the total resistance. The longer the line, the greater its total resistance, and the safe current allowed at the same voltage will be reduced to prevent overheating and energy loss.

[0030] Step 2: Based on the acquired basic information data set of the transmission line, determine the target characteristic value of the transmission line; The specific steps include: Step 201: Based on the basic information data set of the power transmission line, determine the basic information characteristic value of the power transmission line. The specific analysis process is as follows: , in, is the basic information characteristic value of the transmission line, is the total length of the transmission line, is the cross-sectional area of ​​the transmission line conductor, is the current capacity of the transmission line conductor, For setting The compensation factor, For setting The compensation factor, For setting The compensation factor of The above transmission line basic information characteristic values ​​are calculated by the total length of the transmission line, the cross-sectional area of ​​the transmission line conductor, and the current capacity of the transmission line conductor. , , Normalization processing can more accurately evaluate the capacity and performance of transmission lines. Analysis of the basic information characteristic values ​​of transmission lines can identify potential risks and weaknesses, so as to take preventive maintenance measures, reduce sudden failures and power outages, and improve the reliability of the power grid. In the event of a failure or abnormality, having detailed transmission line characteristic values ​​can speed up the fault diagnosis process and make emergency response faster and more effective.

[0031] The above setting , , The compensation factor is obtained from the database, and the total length of the transmission line, the cross-sectional area of ​​the transmission line conductor, the current capacity of the transmission line conductor and the historical measurement are established based on the historical data. , , The mapping set of compensation factors is obtained , , Corresponding , , compensation factor.

[0032] Step 202: The basic information characteristic value of the transmission line is stored as a designated tag, and the designated tag is compared with the target characteristic value of the transmission line corresponding to each designated tag stored in the database to obtain the target characteristic value of the transmission line corresponding to the designated tag; Analyzing the basic information of transmission lines and storing characteristic values ​​as specified tags can improve the understanding of the status and performance of transmission lines. Comparing the target characteristic values ​​of different transmission lines can more effectively identify lines that require priority maintenance or upgrades, allocate resources more specifically, reduce unnecessary maintenance costs, and continuously track and evaluate the performance of transmission lines, adjusting operation and maintenance strategies to adapt to changing grid demands and environmental conditions.

[0033] Step 3: Analyze the actual situation of the transmission line to obtain the transmission line characteristic value, and determine the transmission line reactive power adjustment characteristic value in combination with the transmission line target characteristic value; The specific steps include: Step 301, obtaining a data set of actual conditions of a power transmission line, wherein the data set of actual conditions of a power transmission line specifically includes a voltage of a power transmission line, a power factor of a power transmission line, a resistance of a power transmission line, and an arc discharge frequency of a power transmission line; Transmission line voltage refers to the voltage level of electric energy in the transmission line during transmission. It is usually high voltage to reduce energy loss during transmission. The voltage can be measured by a voltmeter or a voltage sensor. Power factor is the ratio of real power (effective power) to apparent power (power calculated from voltage and current). It is an indicator to measure the efficiency of power system and reflects the efficiency of electric energy utilization. Power factor is usually measured by power quality analyzer or special power factor meter. Transmission line resistance refers to the degree of obstruction of the transmission line material to the flow of current. Line resistance affects the voltage drop and energy loss on the line. The transmission line resistance is usually measured using an ohmmeter or professional line test instrument. Arc discharge frequency refers to the frequency of arc discharge events per unit time in a transmission line, such as within a day. Arc discharge is an undesirable discharge phenomenon in electrical equipment, usually caused by electrical insulation failure or external factors (such as humidity and pollution). Arc discharge detection is usually obtained using an arc discharge monitor.

[0034] It should be noted that the relationship between the above voltage (V) and resistance (R) is described by Ohm's law. In a transmission line, if the resistance increases, a higher voltage is required to maintain the current level at the same current, which will increase energy loss and may cause voltage reduction. A low power factor means that there is a large phase difference between voltage and current, resulting in reduced efficiency. In a transmission system, maintaining high voltage and a suitable power factor is the key to ensuring effective energy transmission. The power factor is determined by the resistive (real power) and inductive (reactive power) components of the line. Resistance directly affects the real power consumption of the line, while the inductive and capacitive properties of the coil and capacitor affect the reactive power. Ideally, the closer the power factor is to 1, the lower the resistance loss and the higher the system efficiency. The arc discharge frequency may be affected by the voltage, resistance and the overall electrical characteristics of the line. Excessive voltage or low resistance may cause arc discharge, especially in the case of poor insulation or harsh environmental conditions. Arc discharge will cause energy loss, damage equipment, and may cause electrical fires.

[0035] Step 302: Based on the acquired actual situation data set of the power transmission line, a comprehensive analysis is performed to obtain actual characteristic values ​​of the power transmission line; In this embodiment, the calculation formula of the transmission line characteristic value is: , in, is the characteristic value of the transmission line, is the transmission line voltage, is the transmission line power factor, is the transmission line resistance, is the arc discharge frequency of the transmission line, For setting The compensation factor, For setting The compensation factor, For setting The compensation factor, For setting compensation factor.

[0036] The above transmission line characteristic values ​​are calculated by transmission line voltage, transmission line power factor, transmission line resistance, and transmission line arc discharge frequency. dy , ys , dz , fpNormalization processing and comprehensive analysis of voltage, power factor, resistance and arc discharge frequency can help accurately understand the performance of transmission lines, accurately identify the health status and performance status of transmission lines, and help to detect problems in advance, such as abnormally high resistance or increased arc discharge frequency, so as to take timely maintenance or repair measures. Real-time monitoring of these key electrical parameters can effectively prevent power outages and equipment failures caused by unstable voltage, unreasonable power factor, excessive resistance or frequent arc discharge, thereby improving the reliability of the power grid and enhancing the safety level.

[0037] Step 303: store the actual characteristic value of the transmission line as a designated tag, compare the designated tag with the transmission line adjustment characteristic value corresponding to each designated tag stored in the database, and obtain the transmission line adjustment characteristic value corresponding to the designated tag; Step 304: record the difference between the transmission line adjustment characteristic value and the transmission line target characteristic value as the transmission line target deviation value; Step 305: store the transmission line target deviation value as a designated tag, compare the designated tag with the transmission line reactive power adjustment characteristic value corresponding to each designated tag stored in the database, and obtain the transmission line reactive power adjustment characteristic value corresponding to the designated tag.

[0038] The above-mentioned precise adjustment of the reactive power of the transmission line helps to maintain the voltage stability of the power grid and reduce transmission losses, thereby improving the efficiency and reliability of the entire power system. The reactive power adjustment characteristic value determined by actual data analysis can accurately control the supply and demand balance of reactive power and reduce the waste of electric energy. By comparing the deviation between the actual transmission characteristic value and the target characteristic value and adjusting the transmission parameters according to these deviations, it can ensure that the transmission line operates in the best condition, which helps to identify and correct potential problems such as excessive resistance or frequent arc discharge. Automated data analysis and characteristic value labeling reduce the need for manual intervention and reduce the risks caused by human errors. The characteristic values ​​obtained by comprehensive analysis of actual situation data sets are used as the basis for decision-making, which can ensure the accuracy and objectivity of data and improve the accuracy and response speed of operations.

[0039] Step 4: Analyze the integrated photovoltaic and storage generator to obtain the state characteristic value of the integrated photovoltaic and storage generator. Based on the state characteristic value of the integrated photovoltaic and storage generator, compare and obtain the reference adjustment characteristic value of reactive power of the transmission line.

[0040] The specific steps include: Step 401, obtaining a data set of the status of the photovoltaic and storage integrated generator, wherein the data set of the status of the photovoltaic and storage integrated generator specifically includes the power generated by the photovoltaic and storage integrated generator, the light intensity received by the photovoltaic and storage integrated generator, the working efficiency of the photovoltaic and storage integrated generator photovoltaic components, and the battery capacity of the photovoltaic and storage integrated generator; The power generation capacity of a photovoltaic and energy storage integrated generator refers to the power output capacity of the photovoltaic and energy storage integrated generator within a specific period of time. The power generation capacity is obtained through a power meter or smart meter. These devices can monitor and record the power output of the power generation system in real time. The light intensity received by the photovoltaic integrated generator refers to the light energy directly irradiated by sunlight onto the photovoltaic module, which is usually measured in watts per square meter (W / m²). The light intensity directly affects the power generation efficiency and total power generation of the photovoltaic module. The light intensity is measured by a solar radiometer (also called a radiometer or absorptometer). Photovoltaic module working efficiency of integrated photovoltaic and energy storage generator Photovoltaic module working efficiency refers to the efficiency of photovoltaic modules in converting received solar energy into electrical energy. The efficiency of photovoltaic modules is indirectly calculated through the power generation recorded by monitoring equipment (such as smart meters) and the light intensity recorded by radiometers; The battery capacity of a photovoltaic-storage integrated generator refers to the maximum ability of the energy storage system to store electrical energy, usually expressed in kilowatt-hours (kWh). The battery capacity determines how long the generator can continue to supply power when there is no sunlight. The battery capacity can be obtained through the battery management system (BMS).

[0041] The above-mentioned light intensity directly affects the amount of electrical energy generated by the photovoltaic module. The higher the light intensity, the more energy the photovoltaic module receives, and accordingly, the power generation capacity will also increase. That is, an increase in light intensity usually leads to an increase in power generation capacity. The working efficiency of the photovoltaic module determines the efficiency of converting the received light energy into electrical energy. Even under the same light intensity, photovoltaic modules with higher efficiency can generate more electrical energy. Improving the efficiency of photovoltaic modules can effectively increase the power generation capacity. Changes in light intensity will also affect the working efficiency of photovoltaic modules. In some cases, such as when the light is too strong, the temperature of the photovoltaic panel may increase, resulting in reduced efficiency. The relationship between light intensity and efficiency may be nonlinear, requiring proper temperature management and light regulation. When there is sufficient sunlight, the battery can store excess electrical energy, and release this energy when the light is insufficient to help maintain the stable output of the power generation system. This storage and release capability enables the integrated photovoltaic storage generator to adapt to different environmental conditions and consumer needs.

[0042] Step 402: Based on the acquired data set of the state of the photovoltaic-storage integrated generator, a comprehensive analysis is performed to obtain a state characteristic value of the photovoltaic-storage integrated generator; The calculation formula of the state characteristic value of the photovoltaic energy storage integrated generator is: , in, is the state characteristic value of the photovoltaic-storage integrated generator, The power generated by the photovoltaic and energy storage integrated generator, The light intensity received by the integrated photovoltaic and energy storage generator, The working efficiency of photovoltaic modules of the integrated photovoltaic storage generator is The battery capacity of the photovoltaic and energy storage integrated generator. For setting The compensation factor, For setting The compensation factor, For setting The compensation factor, For setting compensation factor.

[0043] The above-mentioned state characteristic value of the photovoltaic integrated generator is calculated by the power generated by the photovoltaic integrated generator, the light intensity received by the photovoltaic integrated generator, the working efficiency of the photovoltaic components of the photovoltaic integrated generator, and the battery capacity of the photovoltaic integrated generator. , , , Normalizing and integrating these parameters can more accurately evaluate the overall performance and operating efficiency of the integrated photovoltaic and storage generator. Monitoring these key indicators can predict and identify possible problems with the equipment and perform maintenance or adjustments in a timely manner, thereby extending equipment life and reducing maintenance costs. The state characteristic values ​​of the integrated photovoltaic and storage system can help grid operators better understand the contribution and demand of renewable energy. The calculation of state characteristic values ​​provides data support for the intelligent dispatch of the power grid, making the decision-making process more scientific and data-driven, and can provide more effective management strategies, especially when facing the uncertainty and volatility of renewable energy.

[0044] Step 403: store the state characteristic value of the photovoltaic-storage integrated generator as a designated tag, compare the designated tag with the transmission line reactive power reference adjustment characteristic value corresponding to each designated tag stored in the database, and obtain the transmission line reactive power reference adjustment characteristic value corresponding to the designated tag; The above data using the integrated photovoltaic and storage generator can help more accurately predict and manage the energy demand and supply of the power grid, especially during high-demand periods. The energy output of the photovoltaic and storage equipment can be used to adjust the reactive power of the transmission line, improve the stability and efficiency of the power grid, and monitor the status of the integrated photovoltaic and storage generator in real time and adjust the reactive power of the transmission line accordingly, so as to better cope with demand fluctuations and potential power grid instability. This adaptive adjustment can reduce the risk of power outages and enhance the grid's ability to adapt to fluctuations in renewable energy and other variables. The integrated photovoltaic and storage system helps reduce the need to rely on traditional fossil fuel generators by efficiently converting and storing solar energy. Combining the output of these systems with the reactive power adjustment of the transmission line can more efficiently use renewable energy, reduce energy loss and reduce carbon emissions. The reactive power reference adjustment characteristic value of the transmission line represents the maximum reactive power adjustment capability of the integrated photovoltaic and storage generator.

[0045] Step 5: Based on the reactive power reference adjustment characteristic value of the transmission line and in combination with the reactive power adjustment characteristic value of the transmission line, determine whether the state of the photovoltaic and energy storage integrated generator meets the transmission line adjustment requirements.

[0046] If the state of the photovoltaic and energy storage integrated generator meets the transmission line adjustment requirements, the transmission line reactive power adjustment scheme is determined based on the reactive power adjustment characteristic value of the transmission line; If the status of the integrated photovoltaic and storage generator does not meet the transmission line adjustment requirements, the standby generator set is activated, and the transmission line reactive power reference adjustment characteristic value and the transmission line reactive power adjustment characteristic value are imported into the standby generator set activation model to obtain the standby generator set activation characteristic value. Combined with the transmission line reactive power reference adjustment characteristic value, the transmission line reactive power adjustment plan is obtained.

[0047] The specific steps include: Step 501: record the difference between the reactive power reference adjustment characteristic value of the transmission line and the reactive power adjustment characteristic value of the transmission line as the reactive power adjustment characteristic difference of the transmission line; if the reactive power adjustment characteristic difference of the transmission line is a positive value, the state of the integrated photovoltaic and storage generator meets the transmission line adjustment requirements; if the reactive power adjustment characteristic difference of the transmission line is not a positive value, the state of the integrated photovoltaic and storage generator does not meet the transmission line adjustment requirements.

[0048] The above-mentioned measurement of reactive power adjustment characteristic difference can accurately determine whether the output of the photovoltaic integrated generator meets the actual needs of the transmission line, accurately control the reactive power balance of the power grid, and optimize the voltage quality and stability of the entire power grid. Reactive power is crucial to the voltage stability and power quality of the power grid. Monitoring and adjusting the reactive power difference can prevent the occurrence of power grid overload and instability events, enhance the reliability and anti-interference ability of the system, and accurately determine whether the output of the photovoltaic integrated generator matches the actual needs of the power grid. If the reactive power adjustment characteristic difference is positive, it means that the output of the generator exceeds the current power grid demand, which helps to ensure the stability of the power grid and prevent excessive voltage. If the difference is negative, it indicates that the generator output is insufficient and the power grid may need additional reactive power support to maintain voltage stability. Real-time monitoring and adjustment of the reactive power output of the photovoltaic integrated generator can optimize the operating efficiency of the entire power grid, help reduce power loss, improve the overall energy efficiency of the system, and reduce dependence on traditional peak-shaving power plants. The photovoltaic integrated generator can flexibly adjust its power generation and energy storage behavior according to the actual needs of the power grid, which not only improves the utilization rate of renewable energy, but also reduces energy waste caused by mismatch.

[0049] Step 502: If the state of the integrated photovoltaic and energy storage generator meets the transmission line adjustment requirements, the transmission line reactive power adjustment characteristic value is stored as a designated tag, and the designated tag is compared with the transmission line reactive power adjustment schemes corresponding to each designated tag stored in the database to obtain the transmission line reactive power adjustment scheme corresponding to the designated tag.

[0050] The above-mentioned automatic storage of reactive power adjustment characteristic values ​​and comparison with existing adjustment plans can realize automation and intelligence of power grid management, reduce the need for manual operation, improve processing speed and accuracy, and reduce the possibility of operational errors. Real-time monitoring and adjustment of reactive power can help to quickly respond to load changes, especially in peak demand or unstable supply conditions. Rapid response capability is the key to ensuring power grid stability and reliability. By comparing real-time data with historical successful plans, the most suitable reactive power adjustment plan for the current network conditions can be selected. The data-based decision-making process helps to optimize the operating efficiency of the entire power grid and reduce energy waste.

[0051] Step 503: If the state of the integrated photovoltaic and energy storage generator does not meet the transmission line adjustment requirements, the standby generator set is enabled, and the transmission line reactive power reference adjustment characteristic value and the transmission line reactive power adjustment characteristic value are imported into the standby generator set enabling model to obtain the standby generator set enabling characteristic value; the standby generator set enabling characteristic value and the transmission line reactive power reference adjustment characteristic value are stored as designated tags, and the designated tags are compared with the transmission line reactive power adjustment schemes corresponding to the designated tags stored in the database to obtain the transmission line reactive power adjustment scheme corresponding to the designated tags.

[0052] In this embodiment, the standby generator set activation model is: , in, Enables the characteristic value for the standby generator set, is the reactive power adjustment characteristic value of the transmission line, is the reference adjustment characteristic value of reactive power of transmission line, and e is a natural constant.

[0053] It should be noted that, in this embodiment, there is a one-to-one mapping relationship between each designated tag and the characteristic value stored in the database, and the target characteristic value of the transmission line is used as an example for explanation; There is a one-to-one mapping relationship between each designated tag stored in the database and the target characteristic value of the transmission line, which is stored in the database in advance. Through any designated tag, a unique target characteristic value of the transmission line corresponding to it can be found.

[0054] In this embodiment, the basic information characteristic value of the transmission line is stored as a designated tag, and the designated tag is compared one by one with each designated tag stored in the database to find the same designated tag, and then the target characteristic value of the corresponding transmission line is obtained through the mapping relationship. The above-mentioned activation of the backup generator set ensures that even if the photovoltaic storage integrated generator fails to meet the demand, the power grid can still obtain a stable power supply, which is crucial to maintaining the stability of the power grid and preventing power outages. Combining the reactive power adjustment characteristic value with the backup generator set activation model can accurately calculate the required backup power generation capacity, optimize resource utilization, and ensure maximum energy efficiency. The real-time data-driven decision model enables the power grid to quickly respond to load changes and insufficient power generation, thereby reducing potential threats to the stability of the power grid. Systematic analysis and activation of backup plans help reduce the risk of equipment overload and failure due to insufficient power supply, thereby improving the safety of the entire power grid.

[0055] Step 6: Implement coordinated control based on the determined reactive power adjustment scheme of the transmission line.

[0056] First, adjust the inverter control parameters of the photovoltaic energy storage integrated generator. For example, if the adjustment plan requires increasing reactive power output, the control signal of the inverter can be adjusted to change the voltage amplitude and phase of its output, so that the reactive power output of the generator is changed according to the adjustment plan. Specifically, according to the mathematical relationship between reactive power and voltage amplitude and phase, the output voltage phase is changed by adjusting the inverter, thereby controlling the reactive power output.

[0057] At the same time, the energy storage system of the photovoltaic and storage integrated generator is managed. If the adjustment plan requires the photovoltaic and storage integrated generator to provide a large reactive power support in a short period of time, the energy storage system (such as a battery) can release the stored electric energy to assist in the adjustment. By controlling the charge and discharge controller of the energy storage system, the energy output of the energy storage system is allocated according to the reactive power change curve set by the adjustment plan to maintain the stability of the transmission line voltage. For example, when the transmission line voltage has a downward trend and reactive power needs to be increased to increase the voltage, the energy storage system can discharge quickly to provide additional energy support for the generator, so that the generator can output enough reactive power to jointly increase the voltage.

[0058] During the process of parameter adjustment and energy storage system management, key parameters such as voltage and reactive power of the transmission line are continuously monitored. Real-time data can be obtained through devices such as voltage transformers and power sensors installed on the transmission line. These real-time data are fed back to the control center and compared with the target values ​​in the adjustment plan. For example, the voltage data of the transmission line is collected once a second to observe whether it changes according to the expected trend in the adjustment plan (such as gradually rising to the target voltage value).

[0059] Based on the feedback data, the control parameters of the photovoltaic and energy storage integrated generator are fine-tuned. If the transmission line voltage rises too fast and exceeds the expectations in the adjustment plan, it may be necessary to appropriately reduce the reactive power output of the generator. This can be done by adjusting the control parameters of the inverter again, such as slightly reducing the amplitude of the output voltage or changing the phase difference, so that the reactive power output is reduced, thereby stabilizing the transmission line voltage within the target range.

[0060] When the standby generator set is enabled, the standby generator set is quickly started and the initial parameters are configured according to the enabled characteristic values ​​of the standby generator set and the corresponding reactive power adjustment scheme of the transmission line. For example, according to the output power, voltage and other parameters calculated by the standby generator set enabling model, the speed regulator and excitation system parameters of the standby generator set are set so that it can output reactive power that meets the requirements of the adjustment scheme as soon as possible after startup.

[0061] Similar to the photovoltaic and energy storage integrated generator, the energy storage system (if any) or auxiliary regulation equipment of the standby generator set is controlled. If the standby generator set needs to work with the photovoltaic and energy storage integrated generator, a communication link needs to be established between the two so that they can collaborate in control signals and data transmission. For example, through the communication protocol, the photovoltaic and energy storage integrated generator can transmit the status information of the current transmission line (such as voltage, reactive power, etc.) to the standby generator set so that the standby generator set can better adjust its output.

[0062] During the operation of the standby generator set, it is controlled in coordination with the photovoltaic and energy storage integrated generator (if it is still in operation). The coordinated control of the transmission line voltage is achieved by reasonably allocating the reactive power output by both. For example, according to the requirements for total reactive power in the adjustment plan, the reactive power required to be output by the photovoltaic and energy storage integrated generator and the standby generator set is allocated in a certain proportion (such as determined by factors such as the capacity and efficiency of the generator).

[0063] Continuously monitor the voltage, reactive power and other parameters of the transmission line, as well as the operating status of the photovoltaic and energy storage integrated generator and the backup generator set. If the photovoltaic and energy storage integrated generator meets the transmission line adjustment requirements again after a period of adjustment, the output of the backup generator set can be gradually reduced, and the main voltage coordination control task can be transferred to the photovoltaic and energy storage integrated generator. At the same time, the control parameters of the two are dynamically adjusted according to the monitoring data to ensure that the transmission line voltage always remains within a stable range.

[0064] Figure 3 The image of the standby generator set enabling characteristic value changing with the reactive power reference adjustment characteristic value of the transmission line is shown. The standby generator set enabling characteristic value decreases with the increase of the reactive power reference adjustment characteristic value of the transmission line. Figure 4 The figure shows the change of the standby generator set activation characteristic value with the reactive power adjustment characteristic value of the transmission line, where the x-axis represents the reactive power adjustment characteristic value of the transmission line, and the y-axis represents the standby generator set activation characteristic value. It can help to intuitively understand how the transmission line reactive power adjustment characteristic value affects the standby generator set activation characteristic value. The larger the transmission line reactive power adjustment characteristic value, the larger the standby generator set activation characteristic value. As the transmission line reactive power adjustment characteristic value increases, the influence of the transmission line reactive power adjustment characteristic value on the standby generator set activation characteristic value remains unchanged. The transmission line reactive power reference adjustment characteristic value is set to 20 unchanged, and only the size of the transmission line reactive power adjustment characteristic value is changed. The example values ​​of the transmission line reactive power adjustment characteristic value are shown in Table 1: Table 1 Example of the value of the reactive power adjustment characteristic value of the transmission line in the activation characteristic value of the standby generator set

[0065] It can be seen from the data in Table 1 that when the reactive power reference adjustment characteristic value of the transmission line remains unchanged at 20, the activation characteristic value of the standby generator set increases with the increase of the reactive power adjustment characteristic value of the transmission line.

[0066] Embodiment 2 This embodiment provides an active voltage coordination control system for a photovoltaic and energy storage integrated generator, including: A target characteristic value determination module is used to analyze theoretical data of the transmission line to obtain theoretical characteristic values ​​of the transmission line, and determine target characteristic values ​​of the transmission line based on the theoretical characteristic values ​​of the transmission line; The adjustment characteristic value determination module is used to analyze the actual situation data set of the acquired transmission line to obtain the actual characteristic value of the transmission line, and determine the reactive power adjustment characteristic value of the transmission line in combination with the target characteristic value of the transmission line; A reference adjustment characteristic value determination module is used to analyze the state of the photovoltaic integrated generator and obtain the characteristic value of the photovoltaic integrated generator state, and determine the reference adjustment characteristic value of the reactive power of the transmission line based on the characteristic value of the photovoltaic integrated generator state; The adjustment scheme determination module is used to compare the reactive power adjustment characteristic value of the transmission line with the reactive power reference adjustment characteristic value of the transmission line, and determine the reactive power adjustment scheme of the transmission line according to the comparison result.

[0067] Embodiment 3 This embodiment provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the steps in the active voltage coordinated control method of the photovoltaic-storage integrated generator as described above are implemented.

[0068] Embodiment 4 This embodiment provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, the steps in the active voltage coordinated control method of the photovoltaic-storage integrated generator as described above are implemented.

[0069] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of hardware embodiments, software embodiments, or embodiments combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) containing computer-usable program code.

[0070] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0071] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0072] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process in the computer or other programmable device. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0073] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program, and the program can be stored in a computer-readable storage medium, and when the program is executed, it can include the processes of the embodiments of the above-mentioned methods. The storage medium can be a disk, an optical disk, a read-only memory (ROM) or a random access memory (RAM), etc.

[0074] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. Active voltage coordinated control method for photovoltaic and energy storage integrated generator, characterized in that: The steps include: Analyze theoretical data of the transmission line to obtain theoretical characteristic values ​​of the transmission line, and determine target characteristic values ​​of the transmission line based on the theoretical characteristic values ​​of the transmission line; Analyze the actual situation data set of the acquired transmission line to obtain the actual characteristic value of the transmission line, and determine the reactive power adjustment characteristic value of the transmission line in combination with the target characteristic value of the transmission line; Analyze the state of the photovoltaic integrated generator to obtain the photovoltaic integrated generator state characteristic value, and determine the transmission line reactive power reference adjustment characteristic value based on the photovoltaic integrated generator state characteristic value; The reactive power adjustment characteristic value of the transmission line is compared with the reactive power reference adjustment characteristic value of the transmission line. When the state of the integrated photovoltaic and storage generator does not meet the adjustment requirements of the transmission line, the standby generator set is enabled. The reactive power adjustment scheme of the transmission line is determined by combining the reactive power adjustment characteristic value, the reactive power reference adjustment characteristic value and the standby generator set to achieve coordinated control.

2. The active voltage coordinated control method of the photovoltaic and energy storage integrated generator according to claim 1, characterized in that: The calculation formula of the theoretical characteristic value of the transmission line is: ， in, is the theoretical characteristic value of the transmission line, is the total length of the transmission line, is the cross-sectional area of ​​the transmission line conductor, is the current capacity of the transmission line conductor, For setting The compensation factor, For setting The compensation factor, For setting compensation factor.

3. The active voltage coordinated control method of the photovoltaic and energy storage integrated generator according to claim 1, characterized in that: The calculation formula of the actual characteristic value of the transmission line is: ， in, is the actual characteristic value of the transmission line, is the transmission line voltage, is the transmission line power factor, is the transmission line resistance, is the arc discharge frequency of the transmission line, For setting The compensation factor, For setting The compensation factor, For setting The compensation factor, For setting compensation factor.

4. The active voltage coordinated control method of the photovoltaic and energy storage integrated generator according to claim 1, characterized in that: The process of determining the reactive power adjustment characteristic value of the transmission line includes: The actual characteristic value of the transmission line is stored as a first designated tag, and the first designated tag is compared with the transmission line adjustment characteristic value corresponding to each designated tag stored in the database to obtain the transmission line adjustment characteristic value corresponding to the first designated tag; The difference between the transmission line adjustment characteristic value and the transmission line target characteristic value is recorded as the transmission line target deviation value; The transmission line target deviation value is stored as a second designated tag, and the second designated tag is compared with the transmission line reactive power adjustment characteristic value corresponding to each designated tag stored in the database to obtain the transmission line reactive power adjustment characteristic value corresponding to the second designated tag.

5. The active voltage coordinated control method of the photovoltaic and energy storage integrated generator according to claim 1, characterized in that: The calculation formula of the state characteristic value of the photovoltaic energy storage integrated generator is: ， in, is the state characteristic value of the photovoltaic-storage integrated generator, The power generated by the photovoltaic and energy storage integrated generator, The light intensity received by the integrated photovoltaic and energy storage generator, The working efficiency of photovoltaic modules of the integrated photovoltaic storage generator is The battery capacity of the photovoltaic and energy storage integrated generator. For setting The compensation factor, For setting The compensation factor, For setting The compensation factor, For setting compensation factor.

6. The active voltage coordinated control method of the photovoltaic and energy storage integrated generator according to claim 1, characterized in that: The comparing the reactive power adjustment characteristic value of the transmission line and the reactive power reference adjustment characteristic value of the transmission line, and determining the reactive power adjustment scheme of the transmission line according to the comparison result, comprises: The difference between the reference adjustment characteristic value and the adjustment characteristic value of the reactive power of the transmission line is recorded as the reactive power adjustment characteristic difference of the transmission line. If the difference is positive, the state of the integrated photovoltaic and storage generator meets the adjustment requirements of the transmission line. If the difference is not positive, the state of the integrated photovoltaic and storage generator does not meet the adjustment requirements of the transmission line.

7. The active voltage coordinated control method of the photovoltaic and energy storage integrated generator according to claim 6, characterized in that: If the state of the photovoltaic-storage integrated generator meets the transmission line adjustment demand, the transmission line reactive power adjustment characteristic value is stored as a third designated tag, and the third designated tag is compared with the transmission line reactive power adjustment schemes corresponding to each designated tag stored in the database to obtain the transmission line reactive power adjustment scheme corresponding to the third designated tag; If the state of the photovoltaic and energy storage integrated generator does not meet the transmission line adjustment requirements, the standby generator set is activated, and the transmission line reactive power reference adjustment characteristic value and the transmission line reactive power adjustment characteristic value are imported into the standby generator set activation model to obtain the standby generator set activation characteristic value; The activation characteristic value of the standby generator set is stored as a fourth designated tag, and the fourth designated tag is compared with the reactive power adjustment scheme of the transmission line corresponding to each designated tag stored in the database to obtain the reactive power adjustment scheme of the transmission line corresponding to the fourth designated tag.

8. Active voltage coordination control system of photovoltaic and energy storage integrated generator, characterized in that: include: A target characteristic value determination module is used to analyze theoretical data of the transmission line to obtain theoretical characteristic values ​​of the transmission line, and determine target characteristic values ​​of the transmission line based on the theoretical characteristic values ​​of the transmission line; The adjustment characteristic value determination module is used to analyze the actual situation data set of the acquired transmission line to obtain the actual characteristic value of the transmission line, and determine the reactive power adjustment characteristic value of the transmission line in combination with the target characteristic value of the transmission line; A reference adjustment characteristic value determination module is used to analyze the state of the photovoltaic integrated generator and obtain the characteristic value of the photovoltaic integrated generator state, and determine the reference adjustment characteristic value of the reactive power of the transmission line based on the characteristic value of the photovoltaic integrated generator state; The adjustment scheme determination module is used to compare the reactive power adjustment characteristic value of the transmission line with the reactive power reference adjustment characteristic value of the transmission line. When the state of the integrated photovoltaic and storage generator does not meet the adjustment requirements of the transmission line, the standby generator set is enabled, and the reactive power adjustment scheme of the transmission line is determined by combining the reactive power adjustment characteristic value, the reactive power reference adjustment characteristic value and the standby generator set to achieve coordinated control.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps in the active voltage coordinated control method of a photovoltaic and energy storage integrated generator as described in any one of claims 1 to 7 are implemented.

10. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, the steps in the active voltage coordinated control method of the photovoltaic and energy storage integrated generator as described in any one of claims 1-7 are implemented.

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