Double energy-saving coil core intelligent transformer system and transformer

Abstract

The present invention relates to the field of transformer control, and specifically discloses a dual-energy-saving rolled iron core intelligent transformer system and a transformer. The present invention obtains the load rate of the dual-energy-saving rolled iron core intelligent transformer and compares it with the optimal load rate range of the dual-energy-saving rolled iron core intelligent transformer to determine whether the operation of the dual-energy-saving rolled iron core intelligent transformer needs to be regulated. If regulation is required, the load state of the dual-energy-saving rolled iron core intelligent transformer is obtained. When the intelligent transformer is lightly loaded, the output voltage and operating capacity of the intelligent transformer in the light load state are analyzed to determine the appropriate downward adjustment amount to reduce no-load loss; when the intelligent transformer is heavily loaded, the output voltage and operating capacity of the intelligent transformer in the heavy load state are analyzed to determine the appropriate upward adjustment amount to ensure power supply quality, thereby realizing load adaptive regulation of the dual-energy-saving rolled iron core intelligent transformer, and the output voltage and capacity of the transformer are automatically adjusted to always operate within the optimal load rate range.

Description

Technical Field

[0001] The invention relates to the field of transformer control, and in particular to a double-energy-saving rolled iron core intelligent transformer system and a transformer. Background Art

[0002] As the world's attention to energy conservation and environmental protection continues to increase, the improvement of energy-saving performance of transformers, as equipment with high energy consumption in power systems, has become an important development direction. The dual-energy-saving coiled core intelligent transformer adopts a three-dimensional coiled core structure with equal three-phase magnetic circuits, which can effectively reduce the no-load loss and load loss of the transformer and improve energy utilization efficiency. It also has an intelligent voltage regulation function, which can automatically adjust the output voltage of the transformer according to the changes in the grid voltage, ensure that the output voltage is within the standard range, and improve the power supply quality.

[0003] However, the existing double energy-saving wound core intelligent transformer system still has some limitations and shortcomings in practical applications.

[0004] For example, the existing Chinese patent with publication number CN113539648A discloses a dual energy-saving three-dimensional rolled iron core intelligent transformer, including: a three-dimensional rolled iron core transformer and an intelligent control system; the intelligent control system includes an on-load voltage regulator, a control loop and a data acquisition circuit; the voltage regulating coil tap on the high-voltage side of the three-dimensional rolled iron core transformer is connected to the on-load voltage regulator, the on-load voltage regulator is connected to the control loop, and the control loop is connected to the data acquisition circuit. The three-dimensional rolled iron core intelligent transformer provided by the invention adds an intelligent control system on the basis of the original three-dimensional rolled iron core transformer. In the intelligent control system, the data acquisition circuit collects signals, and the control loop generates a control signal based on the collected signals to control the action of the on-load voltage regulator, and directly adjusts the transformer tap when the transformer is running, so that the transformer can provide a constant output voltage within the standard range when the load changes, which reduces power consumption and greatly saves electricity consumption.

[0005] However, the above patent does not focus on analyzing the adjustment amount of the output voltage when adjusting the output voltage according to the load change, such as combining multiple factors to deeply analyze the appropriate adjustment amount of the transformer output voltage corresponding to different load rates under heavy load and light load, which makes the flexibility and intelligence of the transformer load adaptive adjustment low, and cannot better achieve energy saving effects and ensure power supply quality. Summary of the invention

[0006] In view of the above problems, the present invention proposes a dual energy-saving wound core intelligent transformer system and a transformer to achieve the function of controlling the transformer.

[0007] The technical solution adopted by the present invention to solve its technical problems is: in the first aspect, the present invention provides a dual energy-saving wound iron core intelligent transformer system, including: a transformer load real-time monitoring module: used to obtain the current and voltage of the output side load of the current dual energy-saving wound iron core intelligent transformer, record it as the current current and voltage of the output side load of the intelligent transformer, and analyze the load rate of the current intelligent transformer.

[0008] Transformer operation regulation demand judgment module: used to compare the current load rate of the intelligent transformer with the optimal load rate range of the intelligent transformer, and judge whether the current operation of the intelligent transformer needs to be regulated. If regulation is required, further obtain the load status of the current intelligent transformer. If it is a light load state, execute the light load transformer voltage and capacity adjustment module; if it is a heavy load state, execute the heavy load transformer voltage and capacity adjustment module.

[0009] Light-load transformer voltage and capacity adjustment module: used to obtain the voltage adjustable range of the smart transformer and the voltage tolerance range of the load on the output side of the smart transformer, and obtain the historical light-load operation log of the smart transformer, analyze the appropriate reduction amount of the output voltage and operating capacity of the smart transformer under light-load conditions, and provide feedback.

[0010] Overload transformer voltage and capacity adjustment module: used to obtain the voltage drop and current operating capacity that need to be compensated for the smart transformer, and obtain the historical overload operation log of the smart transformer, analyze the appropriate increase in the output voltage and operating capacity of the smart transformer under overload conditions, and provide feedback.

[0011] Database: used to store the rated power, optimal load rate range, voltage adjustable range, rated voltage, historical light load operation log, historical heavy load operation log, and rated capacity of the smart transformer.

[0012] Based on the above embodiment, the specific working process of the transformer operation control demand judgment module is: extract the optimal load rate range of the intelligent transformer stored in the database, and record the upper limit value and lower limit value of the optimal load rate range of the intelligent transformer as the heavy load threshold and light load threshold of the intelligent transformer respectively.

[0013] The current load rate of the smart transformer is compared with the optimal load rate range of the smart transformer. If the current load rate of the smart transformer is within the optimal load rate range of the smart transformer, the current operation of the smart transformer does not need to be regulated and continues to maintain the original operating state. Otherwise, the current operation of the smart transformer needs to be regulated. The current load rate of the smart transformer is further compared with the heavy load threshold and light load threshold of the smart transformer. If the current load rate of the smart transformer is less than the light load threshold of the smart transformer, the current load state of the smart transformer is a light load state. If the current load rate of the smart transformer is greater than the heavy load threshold of the smart transformer, the current load state of the smart transformer is a heavy load state.

[0014] Based on the above embodiment, the specific working process of the light-load transformer voltage and capacity adjustment module includes: D1: extracting the voltage adjustable range of the intelligent transformer stored in the database and recording it as , and extract the rated voltage of the smart transformer stored in the database and record it as .

[0015] Get the current output voltage of the smart transformer and record it as .

[0016] By analyzing the formula Get the output voltage reduction amount of the smart transformer based on the adjustable voltage range of the smart transformer ,in .

[0017] D2: Obtain the voltage tolerance range of the load on the output side of the smart transformer, and further obtain the maximum output voltage reduction amount of the transformer that the load on the output side of the smart transformer can tolerate, record it as the output voltage reduction amount of the smart transformer based on the load voltage tolerance range, and express it as .

[0018] Based on the above embodiments, the specific working process of the light-load transformer voltage and capacity adjustment module also includes: E1: extracting the historical light-load operation log of the intelligent transformer stored in the database, and obtaining the load rate, set output voltage, set operating capacity and reduced energy loss corresponding to each historical light-load operation of the intelligent transformer.

[0019] The ratio between the energy loss reduced by each historical light-load operation of the smart transformer and its total energy consumption is obtained, and recorded as the energy saving rate corresponding to each historical light-load operation of the smart transformer.

[0020] E2: If the deviation between the load rate corresponding to a certain light-load state operation in the history of the smart transformer and the load rate of the current smart transformer is less than the set load rate deviation threshold, the light-load state in the history of the smart transformer is recorded as the historical reference light-load state of the smart transformer, and the historical reference light-load states of the smart transformer are counted.

[0021] The set output voltage and energy saving rate corresponding to each historical operation of the smart transformer with reference to the light load state are obtained. Based on the single variable principle, a coordinate system is established with the set output voltage as the independent variable and the energy saving rate as the dependent variable. According to the set output voltage and energy saving rate corresponding to each historical operation of the smart transformer with reference to the light load state, the corresponding data points are marked in the coordinate system. The trend curve of the energy saving rate of the smart transformer with reference to the light load state is drawn using the method of establishing a mathematical model. The set output voltage corresponding to the data point with the largest energy saving rate on the trend curve of the energy saving rate with the set output voltage is further obtained, and it is recorded as the reference set output voltage of the smart transformer.

[0022] E3: Obtain the difference between the current output voltage of the smart transformer and the reference setting output voltage of the smart transformer, record it as the output voltage reduction amount of the smart transformer based on the energy saving rate, and express it as .

[0023] On the basis of the above embodiment, the specific working process of the light-load transformer voltage and capacity adjustment module also includes: by analyzing the formula Get the appropriate reduction amount of the output voltage of the smart transformer under light load conditions ,in They represent the preset weight factors of the output voltage reduction amount of the smart transformer based on the adjustable voltage range of the smart transformer, the load voltage tolerance range, and the energy saving rate, respectively. , Indicates the compensation amount of the appropriate reduction amount of the output voltage of the smart transformer under the preset light load state.

[0024] On the basis of the above embodiment, the specific working process of the light-load transformer voltage and capacity adjustment module also includes: obtaining the set operating capacity and energy saving rate corresponding to each historical operation of the intelligent transformer with reference to the light-load state, drawing a trend curve of the energy saving rate of the intelligent transformer with reference to the light-load state operation as the set operating capacity changes, and further obtaining the set operating capacity corresponding to the data point with the largest energy saving rate on the trend curve of the energy saving rate as the set operating capacity changes, and recording it as the reference set operating capacity of the intelligent transformer.

[0025] The difference between the current operating capacity of the smart transformer and the reference setting operating capacity of the smart transformer is obtained, and recorded as the appropriate reduction amount of the operating capacity of the smart transformer under the light load state.

[0026] In a second aspect, the present invention further provides a transformer, comprising the double energy-saving wound core intelligent transformer system according to the present invention.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The present invention monitors the load changes of the dual-energy-saving wound iron core intelligent transformer in real time. When the dual-energy-saving wound iron core intelligent transformer is operating under light load, the output voltage and operating capacity of the dual-energy-saving wound iron core intelligent transformer under the light load state are analyzed to appropriately reduce the downward adjustment amount, thereby realizing load adaptive adjustment of the dual-energy-saving wound iron core intelligent transformer under light load state and reducing no-load loss.

[0028] 2. The present invention monitors the load changes of the double-energy-saving wound iron core intelligent transformer in real time. When the double-energy-saving wound iron core intelligent transformer is operating under overload, the output voltage and operating capacity of the double-energy-saving wound iron core intelligent transformer under the overload state are analyzed to find the appropriate increase in the amount, thereby realizing load adaptive adjustment of the double-energy-saving wound iron core intelligent transformer under the overload state and ensuring the power supply quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0030] Figure 1 This is a system module connection diagram of the present invention.

[0031] Figure 2 It is a flow chart of the present invention. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] See also Figure 1 and Figure 2 As shown, the first aspect of the present invention provides a dual energy-saving coil core intelligent transformer system, including a transformer load real-time monitoring module, a transformer operation control demand judgment module, a light-load transformer voltage and capacity adjustment module, a heavy-load transformer voltage and capacity adjustment module, and a database.

[0034] The transformer load real-time monitoring module is connected to the transformer operation regulation and control demand judgment module, the transformer operation regulation and control demand judgment module is respectively connected to the light-load transformer voltage and capacity adjustment module and the heavy-load transformer voltage and capacity adjustment module, and the database is respectively connected to the transformer load real-time monitoring module, the transformer operation regulation and control demand judgment module, the light-load transformer voltage and capacity adjustment module, and the heavy-load transformer voltage and capacity adjustment module.

[0035] The transformer load real-time monitoring module is used to obtain the current and voltage of the output side load of the current double energy-saving coil core intelligent transformer, record it as the current current and voltage of the output side load of the intelligent transformer, and analyze the load rate of the current intelligent transformer.

[0036] Furthermore, the specific working process of the transformer load real-time monitoring module is: obtain the current and voltage of the load on the output side of the current intelligent transformer and substitute them into the preset load power calculation formula to obtain the current load power on the output side of the intelligent transformer, which is recorded as .

[0037] As a preferred solution, the current and voltage of the load on the output side of the smart transformer are obtained through a current transformer and a voltage transformer installed on the output side of the smart transformer.

[0038] In a specific embodiment, the product of the current and the voltage of the load at the output side of the smart transformer is the load power at the output side of the smart transformer.

[0039] Extract the rated power of the smart transformer stored in the database and record it as .

[0040] By analyzing the formula Get the current load rate of the smart transformer .

[0041] The transformer operation regulation demand judgment module is used to compare the current load rate of the intelligent transformer with the optimal load rate range of the intelligent transformer to determine whether the current operation of the intelligent transformer needs to be regulated. If regulation is required, the load state of the current intelligent transformer is further obtained. If it is a light load state, the light load transformer voltage and capacity adjustment module is executed; if it is a heavy load state, the heavy load transformer voltage and capacity adjustment module is executed.

[0042] Furthermore, the specific working process of the transformer operation control demand judgment module is: extracting the optimal load rate range of the intelligent transformer stored in the database, and recording the upper limit value and lower limit value of the optimal load rate range of the intelligent transformer as the heavy load threshold and light load threshold of the intelligent transformer respectively.

[0043] The current load rate of the smart transformer is compared with the optimal load rate range of the smart transformer. If the current load rate of the smart transformer is within the optimal load rate range of the smart transformer, the current operation of the smart transformer does not need to be regulated and continues to maintain the original operating state. Otherwise, the current operation of the smart transformer needs to be regulated. The current load rate of the smart transformer is further compared with the heavy load threshold and light load threshold of the smart transformer. If the current load rate of the smart transformer is less than the light load threshold of the smart transformer, the current load state of the smart transformer is a light load state. If the current load rate of the smart transformer is greater than the heavy load threshold of the smart transformer, the current load state of the smart transformer is a heavy load state.

[0044] As a preferred solution, the optimal load rate range of the double energy-saving wound iron core intelligent transformer refers to the load rate range that can make the double energy-saving wound iron core intelligent transformer have the highest operating efficiency, the lowest loss and the best comprehensive economic benefits during operation.

[0045] As a preferred solution, the optimal load rate range of the intelligent transformer stored in the database is determined based on the performance parameters and actual operating experience of the double energy-saving wound core intelligent transformer.

[0046] In a specific embodiment, when the load rate of the current smart transformer is lower than the light load threshold (30%), the load state of the current smart transformer is determined to be a light load state; when the load rate of the current smart transformer is higher than the heavy load threshold (80%), the load state of the current smart transformer is determined to be a heavy load state.

[0047] The light-load transformer voltage and capacity adjustment module is used to obtain the voltage adjustable range of the intelligent transformer and the voltage tolerance range of the load on the output side of the intelligent transformer, and obtain the historical light-load operation log of the intelligent transformer, analyze the appropriate reduction amount of the output voltage and operating capacity of the intelligent transformer under the light-load state, and provide feedback.

[0048] Furthermore, the specific working process of the light-load transformer voltage and capacity adjustment module includes: D1: extracting the voltage adjustable range of the intelligent transformer stored in the database and recording it as , and extract the rated voltage of the smart transformer stored in the database and record it as .

[0049] Get the current output voltage of the smart transformer and record it as .

[0050] By analyzing the formula Get the output voltage reduction amount of the smart transformer based on the adjustable voltage range of the smart transformer ,in .

[0051] As a preferred solution, the voltage adjustable range of the smart transformer stored in the database can be obtained through the nameplate, technical documents, instructions and other materials of the smart transformer.

[0052] As a preferred solution, the double energy-saving rolled iron core intelligent transformer adjusts the output voltage by switching the tap switch.

[0053] In a specific embodiment, the voltage adjustable range of the double energy-saving wound core intelligent transformer is ±5% or ±10% of its rated voltage.

[0054] D2: Obtain the voltage tolerance range of the load on the output side of the smart transformer, and further obtain the maximum output voltage reduction amount of the transformer that the load on the output side of the smart transformer can tolerate, record it as the output voltage reduction amount of the smart transformer based on the load voltage tolerance range, and express it as .

[0055] As a preferred solution, the voltage tolerance range of the load refers to the input voltage range within which the load, such as electrical equipment, electronic components, etc., can operate normally without being damaged. Within the voltage tolerance range of the load, the load can operate according to its designed function, while exceeding the load voltage tolerance range may cause load performance degradation, abnormal operation, or even permanent damage.

[0056] As a preferred solution, if there are multiple loads on the output side of the smart transformer, an intersection operation is performed on the voltage tolerance ranges of the multiple loads on the output side of the smart transformer to obtain the voltage tolerance range of the loads on the output side of the smart transformer.

[0057] In a specific embodiment, the load at the output side of the smart transformer requires a voltage fluctuation range within ±5%.

[0058] Furthermore, the specific working process of the light-load transformer voltage and capacity adjustment module also includes: E1: extracting the historical light-load operation log of the intelligent transformer stored in the database, and obtaining the load rate, set output voltage, set operating capacity and reduced energy loss corresponding to each historical light-load operation of the intelligent transformer.

[0059] The ratio between the energy loss reduced by each historical light-load operation of the smart transformer and its total energy consumption is obtained, and recorded as the energy saving rate corresponding to each historical light-load operation of the smart transformer.

[0060] E2: If the deviation between the load rate corresponding to a certain light-load state operation in the history of the smart transformer and the load rate of the current smart transformer is less than the set load rate deviation threshold, the light-load state in the history of the smart transformer is recorded as the historical reference light-load state of the smart transformer, and the historical reference light-load states of the smart transformer are counted.

[0061] In a specific embodiment, the deviation threshold between the load rate corresponding to the historical light-load state operation of the smart transformer and the current load rate of the smart transformer is set to 2% or 3%.

[0062] The set output voltage and energy saving rate corresponding to each historical operation of the smart transformer with reference to the light load state are obtained. Based on the single variable principle, a coordinate system is established with the set output voltage as the independent variable and the energy saving rate as the dependent variable. According to the set output voltage and energy saving rate corresponding to each historical operation of the smart transformer with reference to the light load state, the corresponding data points are marked in the coordinate system. The trend curve of the energy saving rate of the smart transformer with reference to the light load state is drawn using the method of establishing a mathematical model. The set output voltage corresponding to the data point with the largest energy saving rate on the trend curve of the energy saving rate with the set output voltage is further obtained, and it is recorded as the reference set output voltage of the smart transformer.

[0063] E3: Obtain the difference between the current output voltage of the smart transformer and the reference setting output voltage of the smart transformer, record it as the output voltage reduction amount of the smart transformer based on the energy saving rate, and express it as .

[0064] As a preferred solution, the output voltage of the current intelligent transformer is greater than the reference set output voltage of the intelligent transformer.

[0065] Furthermore, the specific working process of the light-load transformer voltage and capacity adjustment module also includes: by analyzing the formula Get the appropriate reduction amount of the output voltage of the smart transformer under light load conditions ,in They represent the preset weight factors of the output voltage reduction amount of the smart transformer based on the adjustable voltage range of the smart transformer, the load voltage tolerance range, and the energy saving rate, respectively. , Indicates the compensation amount of the appropriate reduction amount of the output voltage of the smart transformer under the preset light load state.

[0066] Furthermore, the specific working process of the light-load transformer voltage and capacity adjustment module also includes: obtaining the set operating capacity and energy-saving rate corresponding to each historical operation of the smart transformer with reference to the light-load state, drawing a trend curve of the energy-saving rate of the smart transformer with reference to the light-load state operation as the set operating capacity changes, and further obtaining the set operating capacity corresponding to the data point with the largest energy-saving rate on the trend curve of the energy-saving rate as the set operating capacity changes, and recording it as the reference set operating capacity of the smart transformer.

[0067] As a preferred solution, a trend curve of the energy saving rate of the smart transformer under historical reference light load operation as the set operating capacity changes is drawn. The specific method is: based on the single variable principle, a coordinate system is established with the set operating capacity as the independent variable and the energy saving rate as the dependent variable. According to the set operating capacity and energy saving rate corresponding to each historical reference light load operation of the smart transformer, the corresponding data points are marked in the coordinate system. The mathematical model establishment method is used to draw a trend curve of the energy saving rate of the smart transformer under historical reference light load operation as the set operating capacity changes.

[0068] The difference between the current operating capacity of the smart transformer and the reference setting operating capacity of the smart transformer is obtained, and recorded as the appropriate reduction amount of the operating capacity of the smart transformer under the light load state.

[0069] As a preferred solution, the output voltage and the appropriate reduction amount of the operating capacity of the smart transformer under the light load state are fed back to the remote monitoring terminal of the smart transformer.

[0070] As a preferred solution, the current operating capacity of the smart transformer is greater than the reference set operating capacity of the smart transformer.

[0071] In a specific embodiment, when the load rate of the smart transformer is lower than 30%, the operating capacity of the smart transformer is reduced to 50% of its rated capacity.

[0072] It should be noted that the present invention monitors the load changes of the dual-energy-saving wound iron core intelligent transformer in real time. When the dual-energy-saving wound iron core intelligent transformer is operating under light load, the output voltage and operating capacity of the dual-energy-saving wound iron core intelligent transformer under light load state are analyzed to appropriately reduce the reduction amount, thereby realizing load adaptive adjustment of the dual-energy-saving wound iron core intelligent transformer under light load state and reducing no-load loss.

[0073] The overload transformer voltage and capacity adjustment module is used to obtain the voltage drop and current operating capacity that need to be compensated for the smart transformer, and obtain the historical overload operation log of the smart transformer, analyze the appropriate increase in the output voltage and operating capacity of the smart transformer under the overload state, and provide feedback.

[0074] Furthermore, the specific working process of the heavy-load transformer voltage and capacity adjustment module includes: obtaining the line resistance on the output side of the intelligent transformer, substituting the current load current and line resistance on the output side of the intelligent transformer into the preset relationship function between the load current, line resistance and compensation voltage drop of the intelligent transformer, and obtaining the voltage drop that the intelligent transformer needs to compensate, recording it as the first reference increase in the output voltage of the intelligent transformer under the heavy-load state, and expressing it as .

[0075] In a specific embodiment, it is calculated that the voltage drop that the smart transformer needs to compensate is 5V, that is, the first reference increase amount of the output voltage of the smart transformer under a heavy load state is 5V.

[0076] The historical overload operation log of the smart transformer stored in the database is extracted to obtain the load rate, set output voltage, and set operating capacity corresponding to each historical overload state operation of the smart transformer. The set output voltage corresponding to each historical reference overload state operation of the smart transformer is analyzed, and the average value is calculated to obtain the reference set output voltage of the smart transformer.

[0077] As a preferred solution, the set output voltage corresponding to each historical reference heavy load state operation of the smart transformer is analyzed. The specific method is: if the deviation between the load rate corresponding to a certain historical heavy load state operation of the smart transformer and the load rate of the current smart transformer is less than the set load rate deviation threshold, then the historical heavy load state of the smart transformer is recorded as the historical reference heavy load state of the smart transformer, and the historical reference heavy load states of the smart transformer are counted to obtain the set output voltage corresponding to each historical reference heavy load state operation of the smart transformer.

[0078] In a specific embodiment, the deviation threshold between the load rate corresponding to the historical heavy-load state operation of the smart transformer and the current load rate of the smart transformer is set to 2%.

[0079] Get the difference between the reference setting output voltage of the smart transformer and the current output voltage of the smart transformer, and record it as the second reference increase amount of the output voltage of the smart transformer under heavy load, and record it as .

[0080] As a preferred solution, the output voltage of the current intelligent transformer is less than the reference set output voltage of the intelligent transformer.

[0081] By analyzing the formula Get the appropriate increase in the output voltage of the smart transformer under heavy load conditions ,in weight factors representing the first reference increase amount and the second reference increase amount of the preset output voltage, respectively, , Indicates the compensation amount of the appropriate increase in the output voltage of the smart transformer under the preset heavy load state.

[0082] Furthermore, the specific working process of the overload transformer voltage and capacity adjustment module also includes: obtaining the current operating voltage of the smart transformer, substituting the current operating voltage and output side load current of the smart transformer into the preset operating voltage, load current and operating capacity relationship function of the smart transformer, obtaining the current operating capacity of the smart transformer, and comparing it with the rated capacity of the smart transformer stored in the database to obtain the difference between the current operating capacity of the smart transformer and the rated capacity, and recording it as the first reference increase in the operating capacity of the smart transformer under the overload state.

[0083] The set operating capacity corresponding to each historical reference heavy load state operation of the smart transformer is obtained, and the average value is calculated to obtain the reference set operating capacity of the smart transformer.

[0084] The difference between the current operating capacity of the smart transformer and the reference set operating capacity of the smart transformer is obtained, and recorded as the second reference increase amount of the operating capacity of the smart transformer under the heavy load state.

[0085] As a preferred solution, the current operating capacity of the smart transformer is smaller than the reference setting operating capacity of the smart transformer.

[0086] A weighted average of a first reference increase amount and a second reference increase amount of the operating capacity of the smart transformer under a heavy load state is calculated to obtain a suitable increase amount of the operating capacity of the smart transformer under the heavy load state.

[0087] As a preferred solution, the weights of the first reference increase amount and the second reference increase amount of the operating capacity of the smart transformer under the heavy load state are set values, and the cumulative sum is 1.

[0088] As a preferred solution, the output voltage and the appropriate increase in operating capacity of the smart transformer under heavy load are fed back to the remote monitoring terminal of the smart transformer.

[0089] It should be noted that the present invention monitors the load changes of the double-energy-saving wound iron core intelligent transformer in real time. When the double-energy-saving wound iron core intelligent transformer is overloaded, the output voltage and operating capacity of the double-energy-saving wound iron core intelligent transformer under the overload state are analyzed to determine the appropriate increase in the capacity, thereby achieving load adaptive adjustment of the double-energy-saving wound iron core intelligent transformer under the overload state and ensuring the power supply quality.

[0090] The database is used to store the rated power, optimal load rate range, voltage adjustable range, rated voltage, historical light load operation log, historical heavy load operation log, and rated capacity of the intelligent transformer.

[0091] In a second aspect, the present invention further provides a transformer, comprising the double energy-saving wound core intelligent transformer system according to the present invention.

[0092] The above contents are merely examples and explanations of the concept of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the concept of the invention or exceed the scope defined by the present invention, they shall all fall within the protection scope of the present invention.

Claims

1. Double energy-saving coil core intelligent transformer system, characterized by: include: Transformer load real-time monitoring module: used to obtain the current and voltage of the output side load of the current double energy-saving coil core intelligent transformer, record it as the current current and voltage of the output side load of the intelligent transformer, and analyze the current load rate of the intelligent transformer; Transformer operation regulation demand judgment module: used to compare the current load rate of the intelligent transformer with the optimal load rate range of the intelligent transformer, and judge whether the current operation of the intelligent transformer needs to be regulated. If regulation is required, further obtain the load state of the current intelligent transformer. If it is a light load state, execute the light load transformer voltage and capacity regulation module; if it is a heavy load state, execute the heavy load transformer voltage and capacity regulation module; Light-load transformer voltage and capacity adjustment module: used to obtain the voltage adjustable range of the smart transformer and the voltage tolerance range of the load on the output side of the smart transformer, and obtain the historical light-load operation log of the smart transformer, analyze the appropriate reduction amount of the output voltage and operating capacity of the smart transformer under light-load state, and provide feedback; Overload transformer voltage and capacity adjustment module: used to obtain the voltage drop and current operating capacity that need to be compensated for the smart transformer, and obtain the historical overload operation log of the smart transformer, analyze the appropriate increase in the output voltage and operating capacity of the smart transformer under overload conditions, and provide feedback; Database: used to store the rated power, optimal load rate range, voltage adjustable range, rated voltage, historical light load operation log, historical heavy load operation log, and rated capacity of the smart transformer; The specific working process of the transformer operation control demand judgment module is as follows: Extracting the optimal load rate range of the smart transformer stored in the database, and recording the upper limit value and the lower limit value of the optimal load rate range of the smart transformer as the heavy load threshold value and the light load threshold value of the smart transformer respectively; The current load rate of the smart transformer is compared with the optimal load rate range of the smart transformer. If the current load rate of the smart transformer is within the optimal load rate range of the smart transformer, the current operation of the smart transformer does not need to be regulated and continues to maintain the original operating state. Otherwise, the current operation of the smart transformer needs to be regulated. The current load rate of the smart transformer is further compared with the heavy load threshold and light load threshold of the smart transformer. If the current load rate of the smart transformer is less than the light load threshold of the smart transformer, the current load state of the smart transformer is a light load state. If the current load rate of the smart transformer is greater than the heavy load threshold of the smart transformer, the current load state of the smart transformer is a heavy load state.

2. The double energy-saving wound core intelligent transformer system according to claim 1 is characterized in that: The specific working process of the transformer load real-time monitoring module is as follows: Obtain the current and voltage of the load on the output side of the current smart transformer and substitute them into the preset load power calculation formula to obtain the current load power on the output side of the smart transformer, which is recorded as ; Extract the rated power of the smart transformer stored in the database and record it as ; By analyzing the formula Get the current load rate of the smart transformer .

3. The double energy-saving wound core intelligent transformer system according to claim 1 is characterized in that: The specific working process of the light-load transformer voltage and capacity adjustment module includes: D1: Extract the voltage adjustable range of the smart transformer stored in the database and record it as , is 5 or 10, and the rated voltage of the smart transformer stored in the database is extracted and recorded as ; Get the current output voltage of the smart transformer and record it as ; By analyzing the formula Get the output voltage reduction amount of the smart transformer based on the adjustable voltage range of the smart transformer ,in ; D2: Obtain the voltage tolerance range of the load on the output side of the smart transformer, and further obtain the maximum output voltage reduction amount of the transformer that the load on the output side of the smart transformer can tolerate, record it as the output voltage reduction amount of the smart transformer based on the load voltage tolerance range, and express it as .

4. The double energy-saving wound core intelligent transformer system according to claim 3 is characterized in that: The specific working process of the light-load transformer voltage and capacity adjustment module also includes: E1: extract the historical light-load operation log of the smart transformer stored in the database, and obtain the load rate, set output voltage, set operating capacity and reduced energy loss corresponding to each historical light-load operation of the smart transformer; Obtain the ratio between the energy loss reduced by each historical light-load operation of the smart transformer and its total energy consumption, and record it as the energy saving rate corresponding to each historical light-load operation of the smart transformer; E2: If the deviation between the load rate corresponding to a certain light-load state operation of the smart transformer in history and the load rate of the current smart transformer is less than the set load rate deviation threshold, the light-load state of the smart transformer in history is recorded as the reference light-load state of the smart transformer in history, and the reference light-load states of the smart transformer in history are counted; Obtain the set output voltage and energy saving rate corresponding to each historical operation of the smart transformer with reference to the light load state, establish a coordinate system based on the single variable principle with the set output voltage as the independent variable and the energy saving rate as the dependent variable, mark the corresponding data points in the coordinate system according to the set output voltage and energy saving rate corresponding to each historical operation of the smart transformer with reference to the light load state, and use the method of establishing a mathematical model to draw a trend curve of the energy saving rate of the smart transformer with reference to the light load state when it is running, and further obtain the set output voltage corresponding to the data point with the maximum energy saving rate on the trend curve of the energy saving rate with the set output voltage, and record it as the reference set output voltage of the smart transformer; E3: Obtain the difference between the current output voltage of the smart transformer and the reference setting output voltage of the smart transformer, record it as the output voltage reduction amount of the smart transformer based on the energy saving rate, and express it as .

5. The double energy-saving wound core intelligent transformer system according to claim 4 is characterized in that: The specific working process of the light-load transformer voltage and capacity adjustment module also includes: By analyzing the formula Get the appropriate reduction amount of the output voltage of the smart transformer under light load conditions ,in They represent the preset weight factors of the output voltage reduction amount of the smart transformer based on the adjustable voltage range of the smart transformer, the load voltage tolerance range, and the energy saving rate, respectively. , Indicates the compensation amount of the appropriate reduction amount of the output voltage of the smart transformer under the preset light load state.

6. The double energy-saving wound core intelligent transformer system according to claim 5 is characterized in that: The specific working process of the light-load transformer voltage and capacity adjustment module also includes: Obtain the set operating capacity and energy saving rate corresponding to each historical operation of the smart transformer with reference to the light load state, draw a trend curve of the energy saving rate of the smart transformer with reference to the light load state as the set operating capacity changes, further obtain the set operating capacity corresponding to the data point with the maximum energy saving rate on the trend curve of the energy saving rate as the set operating capacity changes, and record it as the reference set operating capacity of the smart transformer; The difference between the current operating capacity of the smart transformer and the reference setting operating capacity of the smart transformer is obtained, and recorded as the appropriate reduction amount of the operating capacity of the smart transformer under the light load state.

7. The double energy-saving wound core intelligent transformer system according to claim 1 is characterized in that: The specific working process of the heavy-duty transformer voltage and capacity adjustment module includes: The line resistance on the output side of the smart transformer is obtained, and the current load current and line resistance on the output side of the smart transformer are substituted into the relationship function between the preset load current, line resistance and compensation voltage drop of the smart transformer to obtain the voltage drop that the smart transformer needs to compensate, which is recorded as the first reference increase in the output voltage of the smart transformer under heavy load state and expressed as: ; Extract the historical overload operation log of the smart transformer stored in the database, obtain the load rate, set output voltage, and set operating capacity corresponding to each historical overload state operation of the smart transformer, analyze the set output voltage corresponding to each historical reference overload state operation of the smart transformer, and calculate the average value to obtain the reference set output voltage of the smart transformer; Get the difference between the reference setting output voltage of the smart transformer and the current output voltage of the smart transformer, and record it as the second reference increase amount of the output voltage of the smart transformer under heavy load, and record it as ; By analyzing the formula Get the appropriate increase in the output voltage of the smart transformer under heavy load conditions ,in weight factors representing the first reference increase amount and the second reference increase amount of the preset output voltage, respectively, , Indicates the compensation amount of the appropriate increase in the output voltage of the smart transformer under the preset heavy load state.

8. The double energy-saving wound core intelligent transformer system according to claim 7 is characterized in that: The specific working process of the heavy-duty transformer voltage and capacity adjustment module also includes: Obtain the current operating voltage of the smart transformer, substitute the current operating voltage and output side load current of the smart transformer into the preset relationship function between the operating voltage, load current and operating capacity of the smart transformer, obtain the current operating capacity of the smart transformer, and compare it with the rated capacity of the smart transformer stored in the database to obtain the difference between the current operating capacity of the smart transformer and the rated capacity, and record it as the first reference increase amount of the operating capacity of the smart transformer under the heavy load state; Obtain the set operating capacity corresponding to each historical reference heavy load state operation of the smart transformer, and calculate the average value to obtain the reference set operating capacity of the smart transformer; Obtaining the difference between the current operating capacity of the smart transformer and the reference set operating capacity of the smart transformer, and recording it as the second reference increase amount of the operating capacity of the smart transformer under the heavy load state; A weighted average of a first reference increase amount and a second reference increase amount of the operating capacity of the smart transformer under a heavy load state is calculated to obtain a suitable increase amount of the operating capacity of the smart transformer under the heavy load state.

9. A transformer, characterized in that: The transformer comprises a double energy-saving wound core intelligent transformer system according to any one of claims 1-8.

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