Intelligent electromagnetic balance energy-saving system

Abstract

The invention discloses an intelligent electromagnetic balance energy-saving system, and relates to the technical field of intelligent power grids. According to the system, power grid operation data are collected and preprocessed into per unit values, equivalent reactance and the total reactive power vacancy of the system are calculated according to the per unit values, then the rated capacity of a reactive compensation device is combined, the reactive power vacancy of an inverter is calculated, inverter operation data and current collection line parameters are obtained, and first reactive power and second reactive power are obtained through preset operation; and finally, the bus voltage and the system power factor of the transformer after control are collected again, and an adjusting instruction is judged and generated according to the bus voltage and the system power factor. Reactive power compensation of the inverter is realized, output of the inverter is controlled to be optimal, influence of electromagnetism on a power grid is reduced, stability of voltage and power factors of the power grid is ensured, a control strategy can be automatically adjusted according to closed-loop design, and stability of the power grid and operation efficiency of the inverter are improved.

Description

An intelligent electromagnetic balance energy-saving system Technical Field

[0001] This invention belongs to the field of smart grid technology, and specifically relates to an intelligent electromagnetic balance energy-saving system. Background Technology

[0002] A photovoltaic (PV) distribution network is an energy configuration that combines PV power generation systems with distribution networks. Distributed PV is the primary access type, and it is mostly deployed on the user side or at the end of the distribution network. It is a key carrier for realizing the local utilization of clean energy. Its core components include PV arrays, inverters, transformers, energy storage devices, and intelligent control and management systems. During operation, the electricity generated by PV is prioritized for supplying local loads, and surplus electricity can be connected to the distribution network for transmission to other users or stored for backup, significantly reducing long-distance transmission losses. It not only promotes the consumption of clean energy such as wind power and PV, but also improves the flexibility and reliability of the distribution network. Through intelligent monitoring and regulation, it ensures the stable and efficient access of PV power to the distribution network, meeting users' electricity needs.

[0003] In a photovoltaic distribution network, when the intensity of sunlight changes rapidly or the equipment ages, the output power of the photovoltaic panels will change quickly. This alters the actual operating characteristics of the energy-saving devices in the electromagnetic balance system. For example, inductance parameters and electromagnetic inductance coefficients may deviate from their initial values, leading to inaccurate power parameters across the entire distribution network and consequently, inaccurate calculations. For instance, the power required by the inverter may exceed the power supplied by the distribution network. This prevents the intelligent control and management system from accurately assessing the situation, resulting in excessive energy consumption and increased electricity costs. Summary of the Invention

[0004] The purpose of this invention is to solve the problem of excessive energy consumption caused by inaccurate power parameters due to electromagnetic imbalance in photovoltaic power distribution networks, and to propose an intelligent electromagnetic balance energy-saving system.

[0005] This invention proposes an intelligent electromagnetic balance energy-saving system, the system comprising:

[0006] The preprocessing module is used to collect operating data from the power grid, preprocess the operating data to obtain per-unit values, and calculate the equivalent reactance based on the per-unit values; the operating data includes the actual voltage value of the transformer bus and the total reactive power of the system;

[0007] The reactive power deficit calculation module is used to calculate the total reactive power deficit of the system using the actual voltage value, the equivalent reactance and the voltage reference value, and to calculate the reactive power deficit of the inverter based on the total reactive power deficit of the system and the rated capacity of the reactive power compensation device.

[0008] The reactive power calculation module is used to acquire inverter operating data and collector line parameters. It performs preset operations based on the inverter operating data, collector line parameters, and the inverter's reactive power deficit to obtain the first reactive power and the second reactive power. The first reactive power is the reactive power required by the inverter based on the line resistance. The second reactive power is the reactive power required by the inverter based on the line length.

[0009] The control module is used to control the inverter based on the first reactive power and the second reactive power;

[0010] The adjustment instruction module is used to re-acquire the transformer bus voltage and system power factor after control, and to make judgments and generate adjustment instructions based on the transformer bus voltage and system power factor.

[0011] Optionally, the preprocessing module includes a deletion module and a transformation module, wherein:

[0012] The deletion module is used to collect operating data at two consecutive moments. If the actual voltage value of the transformer bus or the total reactive power data of the system at a certain moment suddenly rises or falls, it is determined to be invalid data caused by equipment failure or interference. The data set is then deleted and replaced with data from the adjacent consecutive stable moments.

[0013] The conversion module is used to convert the actual voltage value to a voltage per-unit value based on the system rated voltage, and to convert the total reactive power of the system to a reactive power per-unit value based on the system rated reactive power.

[0014] Optionally, the reactive power deficit calculation module includes an equivalent reactance calculation module, wherein:

[0015] The equivalent reactance is obtained by calculating the per-unit voltage value and the per-unit reactive power value. The specific calculation process is as follows:

[0016]

[0017] in, For equivalent reactance, Let k be the per-unit voltage value at time k. Let k be the per-unit voltage value at time k-1. Let be the per-unit value of reactive power at time k. Let be the per-unit value of reactive power at time k-1.

[0018] Optionally, the reactive power deficit calculation module further includes a total reactive power deficit calculation module, wherein:

[0019] The total reactive power deficit calculation module is used to calculate the voltage deviation value using the actual voltage value and the voltage reference value, and to calculate the total reactive power deficit of the system based on the voltage deviation value and the equivalent reactance. The specific process is as follows:

[0020]

[0021]

[0022] in, This represents the total reactive power deficit of the system. For equivalent reactance, This is the voltage deviation value. This is the actual voltage value. This is the voltage reference value.

[0023] Optionally, the reactive power deficit calculation module further includes a discrimination module, wherein:

[0024] The discrimination module is used to determine the total reactive power deficit of the system. With the rated capacity of the reactive power compensation device In comparison, if The inverter's reactive power deficit ;

[0025] like The inverter's reactive power deficit .

[0026] Optionally, the reactive power calculation module includes a constraint module and a power calculation module, wherein:

[0027] The constraint module is used to set a constraint condition that minimizes the total active power loss of the system. The process is as follows:

[0028]

[0029] The constraint condition is that the sum of the reactive power handled by all inverters must equal [the required amount]. The constraints are:

[0030]

[0031] in, This represents the total active power loss of the system, where n is the number of inverters. Let represent the active power output of the i-th inverter. This represents the reactive power output of the i-th inverter. Indicates the system's rated voltage. Let be the collector line resistance corresponding to the i-th inverter;

[0032] The power calculation module is used to calculate the first reactive power and the second reactive power based on minimizing the total active power loss of the system and the constraints.

[0033] Optionally, the power calculation module includes a first calculation module, wherein:

[0034] The first calculation module is used to calculate the reactive power loss of the collector lines and determine the reactive power deficit of all inverters. The first reactive power is calculated by combining the resistance of the collector line. The process is as follows:

[0035]

[0036]

[0037] in, The first reactive power required by the i-th inverter. Based on the reactive power loss of the i-th collector line, For collector current, It is the equivalent reactance of the collector line connected to the i-th inverter.

[0038] Optionally, the power calculation module includes a second calculation module, comprising:

[0039] The second calculation module is used when the collector lines connected to the same inverter are of the same type. The collector line resistance is replaced with the collector line length to calculate the second reactive power. The process is as follows:

[0040]

[0041] in, The second reactive power required by the i-th inverter. Let be the length of the i-th collector line. Let be the reactance of the i-th collector line. The output voltage of the i-th inverter.

[0042] Optionally, the control module includes a weighting module and a compensation module, wherein:

[0043] The weighting module is used to perform a weighted summation of the first reactive power and the second reactive power using a preset weighting factor and take the average value to obtain the final reactive power.

[0044] The compensation module is used to perform reactive power compensation on the inverter based on the final reactive power.

[0045] Optionally, the adjustment instruction module includes a judgment module, a recalculation module, and an energy-saving assessment module, wherein:

[0046] The judgment module is used to compare the transformer bus voltage and the system power factor with the voltage threshold and the power standard value, respectively, to obtain the judgment result:

[0047] If both the load-side bus voltage and the system power factor meet the requirements, the current reactive power allocation will be maintained.

[0048] The recalculation module is used to re-collect operating data from the power grid at a new time and recalculate the first reactive power and the second reactive power if either the load-side bus voltage or the system power factor fails to meet the standard, until the transformer bus voltage and the system power factor both meet the standard, and then the process ends.

[0049] The energy-saving assessment module is used to monitor the system's operating status in real time, calculate the comprehensive energy-saving efficiency index based on historical operating data and the current reactive power compensation effect, and generate a visual energy-saving report; the energy-saving report includes the energy saved and voltage stability assessment results.

[0050] The beneficial effects of this invention are:

[0051] This invention proposes an intelligent electromagnetic balance energy-saving system to solve the problem of excessive energy consumption caused by electromagnetic imbalance. By collecting and preprocessing grid operation data to obtain per-unit values ​​and equivalent reactance, the reactive power deficit is calculated, and the reactive power required by the inverter is determined, making the power data more accurate. This enables reactive power compensation of the inverter, controlling its output to reach the optimal level, reducing the impact of electromagnetic interference on the grid, ensuring the stability of grid voltage and power factor, and automatically adjusting the control strategy according to the closed-loop design to improve grid stability and inverter operating efficiency. Attached Figure Description

[0052] The present invention will now be further described with reference to the accompanying drawings.

[0053] Figure 1 is a framework diagram of an intelligent electromagnetic balance energy-saving system provided in an embodiment of the present invention. Detailed Implementation

[0054] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The term "and / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and B can represent: A alone, A and B simultaneously, and B alone. Furthermore, descriptions involving "first," "second," etc., in this invention are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" can explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0055] Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0056] This invention provides an intelligent electromagnetic balance energy-saving system. Referring to Figure 1, Figure 1 is a framework diagram of an intelligent electromagnetic balance energy-saving system provided by this invention. The system includes:

[0057] The preprocessing module is used to collect operating data from the power grid, preprocess the operating data to obtain per-unit values, and calculate the equivalent reactance based on the per-unit values;

[0058] The reactive power deficit calculation module is used to calculate the total reactive power deficit of the system using the actual voltage value, equivalent reactance and voltage reference value, and to calculate the reactive power deficit of the inverter based on the total reactive power deficit of the system and the rated capacity of the reactive power compensation device.

[0059] The reactive power calculation module is used to obtain inverter operating data and collector line parameters. It performs preset operations based on inverter operating data, collector line parameters, and inverter reactive power deficit to obtain the first reactive power and the second reactive power.

[0060] The control module is used to control the inverter based on the first reactive power and the second reactive power.

[0061] The adjustment instruction module is used to re-acquire the transformer bus voltage and system power factor after control, and to make judgments and generate adjustment instructions based on the transformer bus voltage and system power factor.

[0062] The operating data includes the actual voltage value of the transformer bus and the total reactive power of the system.

[0063] The first reactive power is the reactive power required by the inverter based on the line resistance; the second reactive power is the reactive power required by the inverter based on the line length.

[0064] Based on the intelligent electromagnetic balance energy-saving system provided by the embodiments of the present invention, the per-unit value and equivalent reactance are obtained by collecting grid operation data and preprocessing it, and then the reactive power deficit is calculated to determine the reactive power required by the inverter, thereby realizing reactive power compensation of the inverter, controlling its output to reach the optimal, reducing the electromagnetic impact on the grid, ensuring the stability of grid voltage and power factor, and automatically adjusting the control strategy according to the closed-loop design to improve grid stability and inverter operating efficiency, and facilitating subsequent maintenance and monitoring.

[0065] In one implementation, the voltage reference value, collector line parameters, and rated capacity of the reactive power compensation device are obtained from the power grid parameter manual, which is stored in advance in the system database; the reactive power compensation device includes capacitors, static var compensators, and static var generators.

[0066] In one implementation, reactive power refers to the non-active power component used to maintain the electromagnetic energy exchange of grid equipment and ensure voltage stability and power factor compliance within the local system of photovoltaic access to low-voltage distribution network (with the low-voltage side bus of the transformer as the core). Essentially, it is the amount of electromagnetic energy exchanged back and forth when there is a phase difference between voltage and current in an AC circuit. The reactive power interaction relationship of the local system is: photovoltaic inverter (via collector line) — low-voltage side bus of transformer — reactive power compensation device.

[0067] In one implementation, the control module compensates for the power required by the inverter, enabling the inverter to operate in a normal state and reducing energy consumption.

[0068] In one embodiment, the preprocessing module includes a deletion module and a transformation module, wherein:

[0069] The deletion module is used to collect operating data at two consecutive moments. If the actual voltage value of the transformer bus or the total reactive power data of the system suddenly rises or falls at a certain moment, it is determined to be invalid data caused by equipment failure or interference. The data set is then deleted and replaced with data from the adjacent consecutive stable moments.

[0070] The conversion module is used to convert the actual voltage value to a voltage per-unit value based on the system rated voltage, and to convert the total reactive power of the system to a reactive power per-unit value based on the system rated reactive power.

[0071] In one implementation, in power grid system calculations, the voltage levels of equipment vary, and directly using actual values ​​for calculations would be very cumbersome and prone to errors. Per-unit values ​​can clearly reflect the operating status of a system.

[0072] In one implementation, by monitoring sudden changes in transformer bus voltage and system reactive power, abnormal data caused by faults or interference can be effectively identified and eliminated, ensuring the accuracy of the data used for calculation. At the same time, the actual voltage and reactive power are converted into per-unit values ​​to standardize the data, which facilitates subsequent analysis and processing and provides data support for accurate calculations.

[0073] In one embodiment, the reactive power deficit calculation module includes an equivalent reactance calculation module, wherein:

[0074] The reactive power deficit calculation module includes an equivalent reactance calculation module, in which:

[0075] The equivalent reactance is obtained by calculating the per-unit voltage and per-unit reactive power values. The specific calculation process is as follows:

[0076]

[0077] in, For equivalent reactance, Let k be the per-unit voltage value at time k. Let k be the per-unit voltage value at time k-1. Let be the per-unit value of reactive power at time k. Let be the per-unit value of reactive power at time k-1.

[0078] One implementation addresses the issue of dynamic fluctuations in equivalent reactance caused by changes in system operating modes, providing core parameters for accurate subsequent calculation of reactive power deficit and avoiding over- or under-compensation due to inaccurate parameters. By comprehensively considering per-unit voltage and per-unit reactive power values, the equivalent reactance of the power grid system is quantified, effectively reflecting the reactance characteristics of the system at different times, eliminating the impact of data fluctuations on the equivalent reactance, making the equivalent reactance more accurate, and improving the reliability of the calculation results.

[0079] In one embodiment, the reactive power deficit calculation module further includes a total reactive power deficit calculation module, wherein:

[0080] The total reactive power deficit calculation module is used to calculate the voltage deviation value using the actual voltage value and the voltage reference value, and then calculate the total reactive power deficit of the system based on the voltage deviation value and the equivalent reactance. The specific process is as follows:

[0081]

[0082]

[0083] in, This represents the total reactive power deficit of the system. This is the voltage deviation value. This is the actual voltage value. This is the voltage reference value.

[0084] In one implementation, the required reactive power compensation is clearly defined, providing a total basis for subsequent reactive power allocation, ensuring that the compensation target matches the voltage quality requirements, and accurately calculating the total reactive power deficit of the system by utilizing the deviation between the actual voltage and the reference voltage and the equivalent reactance, thus providing key data support for reactive power compensation of the power grid.

[0085] In one embodiment, the reactive power deficit calculation module further includes a discrimination module, wherein:

[0086] The discrimination module is used to determine the total reactive power deficit of the system. With the rated capacity of the reactive power compensation device In comparison, if The inverter's reactive power deficit ;

[0087] like The inverter's reactive power deficit .

[0088] One approach addresses the issue of insufficient capacity of a single compensation device by prioritizing compensation devices and supplementing with inverters. This approach fully utilizes the reactive power regulation capabilities of photovoltaic inverters, avoids power factor exceeding limits or voltage failure due to insufficient compensation capacity, and rationally allocates reactive power compensation from inverters to ensure stable grid operation.

[0089] In one embodiment, the reactive power calculation module includes a constraint module and a power calculation module, wherein:

[0090] The constraint module is used to set a constraint condition that minimizes the total active power loss of the system. The process is as follows:

[0091]

[0092] The constraint is that the sum of the reactive power handled by all inverters must equal The constraints are:

[0093]

[0094] in, This represents the total active power loss of the system, where n is the number of inverters. Let represent the active power output of the i-th inverter. This represents the reactive power output of the i-th inverter. Indicates the system's rated voltage. Let be the collector line resistance corresponding to the i-th inverter;

[0095] The power calculation module is used to calculate the first reactive power and the second reactive power based on minimizing the total active power loss of the system and the constraints.

[0096] In one implementation, mathematical modeling is used to set a target for minimizing the total active power loss of the system and constraints on reactive power allocation. The reactive power required by the inverter based on line resistance and line length is calculated, thereby minimizing the total active power loss of the system.

[0097] In one embodiment, the power calculation module includes a first calculation module, wherein:

[0098] The first calculation module is used to calculate the reactive power loss of all inverters by calculating the reactive power deficit of the collector lines. The first reactive power is calculated by combining the resistance of the collector line. The process is as follows:

[0099]

[0100]

[0101] in, The first reactive power required by the i-th inverter. Based on the reactive power loss of the i-th collector line, For collector current, It is the equivalent reactance of the collector line connected to the i-th inverter.

[0102] In one implementation, the reactive power loss of the collector line is calculated, and combined with the reactive power deficit of the inverter and parameters such as the resistance and reactance of the collector line, the reactive power demand of each line is reasonably allocated to solve the problem of uneven reactive power distribution of the inverter leading to excessive local losses or equipment overload.

[0103] In one embodiment, the power calculation module includes a second calculation module, comprising:

[0104] The second calculation module is used for inverters with the same type of collector line. The collector line resistance is replaced with the collector line length to calculate the second reactive power. The process is as follows:

[0105]

[0106] in, The second reactive power required by the i-th inverter. Let be the length of the i-th collector line. Let be the reactance of the i-th collector line. The output voltage of the i-th inverter.

[0107] In one implementation, the inverter output voltage is acquired by a sensor. By replacing the collector line resistance with the collector line length, the reactive power distribution calculation among multiple photovoltaic inverters is simplified, reducing the difficulty of engineering data acquisition. At the same time, since the proportional constant cancels out in the distribution share calculation, it does not affect the accuracy of the reactive power distribution result, ensuring the minimization of the total network loss of the system and facilitating the optimization of reactive power distribution.

[0108] In one embodiment, the control module includes a weighting module and a compensation module, wherein:

[0109] The weighting module is used to perform a weighted summation of the first reactive power and the second reactive power using a preset weighting factor and then take the average value to obtain the final reactive power.

[0110] The compensation module is used to compensate the inverter for reactive power based on the final reactive power.

[0111] In one implementation, the final reactive power is obtained by weighting and summing the first and second reactive power using a preset weighting factor and then averaging the sums. The process is as follows:

[0112]

[0113] in, The final reactive power required by the i-th inverter is... and The weighting factors were set based on experimental data, and .

[0114] In one implementation, the first reactive power and the second reactive power are weighted and summed by a preset weighting factor, and the average value is taken. This can take into account factors such as line resistance and length, accurately calculate the final reactive power, and compensate the inverter accordingly to optimize the reactive power distribution.

[0115] In one embodiment, the adjustment instruction module includes a judgment module, a recalculation module, and an energy-saving assessment module, wherein:

[0116] The judgment module compares the transformer bus voltage and the system power factor with the voltage threshold and power standard value, respectively, to obtain the judgment result.

[0117] If the load-side bus voltage and system power factor both meet the requirements, then maintain the current reactive power allocation.

[0118] The recalculation module is used to re-collect the operating data at the new moment from the power grid and recalculate the first reactive power and the second reactive power if either the load-side bus voltage or the system power factor fails to meet the standard, until the transformer bus voltage and the system power factor both meet the standard, at which point the process ends.

[0119] The energy-saving assessment module is used to monitor the system's operating status in real time, calculate the comprehensive energy-saving efficiency index based on historical operating data and the current reactive power compensation effect, and generate a visual energy-saving report; the energy-saving report includes the energy saved and voltage stability assessment results.

[0120] In one implementation, the system power factor is obtained from the power grid parameter manual. By monitoring the transformer bus voltage and system power factor in real time and comparing them with a set threshold, the reactive power distribution is dynamically adjusted. If the threshold is not met, data is re-collected and compensation is optimized until the threshold is met. At the same time, the comprehensive energy-saving efficiency is calculated based on historical and current data, and a visual report containing energy-saving effects and voltage stability is generated to facilitate observation and maintenance by staff.

[0121] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. An intelligent electromagnetic balance energy-saving system, characterized in that, The system includes: a preprocessing module for collecting operational data from the power grid, preprocessing the operational data to obtain per-unit values, and calculating equivalent reactance based on the per-unit values; the operational data includes the actual voltage value of the transformer bus and the total reactive power of the system; a reactive power deficit calculation module for calculating the total reactive power deficit of the system using the actual voltage value, the equivalent reactance, and the voltage reference value, and calculating the reactive power deficit of the inverter based on the total reactive power deficit of the system and the rated capacity of the reactive power compensation device; and a reactive power calculation module for acquiring inverter operational data and collector line parameters, and calculating the reactive power deficit of the inverter based on the actual voltage value, the equivalent reactance, and the voltage reference value. The system performs preset operations based on inverter operating data, collector line parameters, and inverter reactive power deficit to obtain a first reactive power and a second reactive power. The first reactive power is the reactive power required by the inverter based on line resistance; the second reactive power is the reactive power required by the inverter based on line length. A control module is used to control the inverter based on the first reactive power and the second reactive power. An adjustment command module is used to re-acquire the controlled transformer bus voltage and system power factor, make judgments based on the transformer bus voltage and the system power factor, and generate adjustment commands.

2. The intelligent electromagnetic balance energy-saving system according to claim 1, characterized in that, The preprocessing module includes a deletion module and a conversion module. The deletion module collects operational data from two consecutive time points. If the actual transformer bus voltage or the total reactive power data of the system experiences a sudden increase or decrease at a certain time point, it is determined to be invalid data caused by equipment failure or interference. This set of data is then deleted, and data from adjacent consecutive stable time points is used instead. The conversion module converts the actual voltage value to a per-unit voltage value based on the system's rated voltage, and converts the total reactive power of the system to a per-unit reactive power value based on the system's rated reactive power.

3. The intelligent electromagnetic balance energy-saving system according to claim 1, characterized in that, The reactive power deficit calculation module includes an equivalent reactance calculation module, wherein: the equivalent reactance is obtained by calculating the per-unit voltage value and the per-unit reactive power value, and the specific calculation process is as follows: in, For equivalent reactance, Let k be the per-unit voltage value at time k. Let k be the per-unit voltage value at time k-1. Let be the per-unit value of reactive power at time k. Let be the per-unit value of reactive power at time k-1.

4. The intelligent electromagnetic balance energy-saving system according to claim 1, characterized in that, The reactive power deficit calculation module further includes a total reactive power deficit calculation module, wherein: the total reactive power deficit calculation module is used to calculate the voltage deviation value using the actual voltage value and the voltage reference value, and calculate the total reactive power deficit of the system based on the voltage deviation value and the equivalent reactance. The specific process is as follows: in, This represents the total reactive power deficit of the system. For equivalent reactance, This is the voltage deviation value. This is the actual voltage value. This is the voltage reference value.

5. The intelligent electromagnetic balance energy-saving system according to claim 4, characterized in that, The reactive power deficit calculation module further includes a discrimination module, wherein: the discrimination module is used to determine the total reactive power deficit of the system. With the rated capacity of the reactive power compensation device In comparison, if The inverter's reactive power deficit ;like The inverter's reactive power deficit 。 6. The intelligent electromagnetic balance energy-saving system according to claim 1, characterized in that, The reactive power calculation module includes a constraint module and a power calculation module, wherein: the constraint module is used to set a constraint condition that minimizes the total active power loss of the system, and the process is as follows: The constraint condition is that the sum of the reactive power handled by all inverters must equal [the required amount]. The constraints are: in, This represents the total active power loss of the system, where n is the number of inverters. Let represent the active power output of the i-th inverter. This represents the reactive power output of the i-th inverter. Indicates the system's rated voltage. Let be the collector line resistance corresponding to the i-th inverter; the power calculation module is used to calculate the first reactive power and the second reactive power based on minimizing the total active power loss of the system and the constraints.

7. The intelligent electromagnetic balance energy-saving system according to claim 6, characterized in that, The power calculation module includes a first calculation module, wherein: the first calculation module is used to calculate the reactive power loss of all inverters by calculating the reactive power deficit of the collector lines. The first reactive power is calculated by combining the resistance of the collector line. The process is as follows: in, The first reactive power required by the i-th inverter. Based on the reactive power loss of the i-th collector line, For collector current, It is the equivalent reactance of the collector line connected to the i-th inverter.

8. The intelligent electromagnetic balance energy-saving system according to claim 6, characterized in that, The power calculation module includes a second calculation module, which is used to calculate the second reactive power when the collector lines connected to the same inverter are of the same type, replacing the collector line resistance with the collector line length. The process is as follows: in, The second reactive power required by the i-th inverter. Let be the length of the i-th collector line. Let be the reactance of the i-th collector line. The output voltage of the i-th inverter.

9. The intelligent electromagnetic balance energy-saving system according to claim 1, characterized in that, The control module includes a weighting module and a compensation module, wherein: the weighting module is used to perform weighted summation of the first reactive power and the second reactive power using a preset weighting factor and take the average value to obtain the final reactive power; the compensation module is used to perform reactive power compensation on the inverter based on the final reactive power.

10. The intelligent electromagnetic balance energy-saving system according to claim 1, characterized in that, The adjustment instruction module includes a judgment module, a recalculation module, and an energy-saving assessment module. Specifically: the judgment module compares the transformer bus voltage and the system power factor with voltage thresholds and power standard values, respectively, to obtain a judgment result; if both the load-side bus voltage and the system power factor meet the standards, the current reactive power allocation is maintained; the recalculation module, if either the load-side bus voltage or the system power factor fails to meet the standards, re-collects operating data from the power grid at a new time and recalculates the first and second reactive power until both the transformer bus voltage and the system power factor meet the standards, then terminates the process; the energy-saving assessment module monitors the system operating status in real time, calculates a comprehensive energy-saving efficiency index based on historical operating data and the current reactive power compensation effect, and generates a visualized energy-saving report; the energy-saving report includes the energy saved and voltage stability assessment results.

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