Method for detecting real oil level of transformer oil and related device

Abstract

The embodiment of the invention relates to the technical field of power equipment, and provides a transformer oil real oil level detection method and a related device, and the method comprises the steps: obtaining transformer oil monitoring data and transformer parameter data; according to the transformer oil liquid monitoring data, first oil liquid pressure intensity and second oil liquid pressure intensity are determined, and the first oil liquid pressure intensity and the second oil liquid pressure intensity are the oil liquid pressure intensity of a first position and the oil liquid pressure intensity of a second position which are arranged at the lower portion of an oil discharging pipe of an oil conservator according to a preset height difference; and according to the first hydraulic pressure, the second hydraulic pressure and the transformer parameter data, the real oil level of the transformer oil is obtained through calculation. According to the real-time oil pressure intensity of the first position and the oil pressure intensity of the second position which are arranged at the lower part of the oil discharge pipe of the oil conservator according to the preset height difference, the real-time real oil level of the transformer oil is calculated, so that a worker is helped to observe the real oil level of the transformer oil, and the accuracy of monitoring the oil level of the transformer is improved.

Description

Technical Field

[0001] The present application relates to the technical field of electric power equipment, and in particular to a method for detecting the true oil level of transformer oil and a related device. Background Art

[0002] In the daily operation of the power system, the transformer is one of the key equipment, and its operating status is directly related to the safety and stability of the entire system. As an important component of the transformer, transformer oil not only plays the role of insulation, cooling and arc extinguishing, but also reflects the operating status of the transformer through changes in its physical and chemical properties. Therefore, real-time monitoring of transformer oil, especially oil level monitoring, is of great significance for preventing transformer failures and ensuring the safe operation of the power system.

[0003] Traditional transformer oil level monitoring methods mostly rely on mechanical oil level gauges, which judge the oil level of the transformer by observing the oil level indication in the oil level gauge. However, for mechanical oil level gauges, especially those that have been in use for a long time, it is easy to cause the "false oil level" phenomenon due to various reasons such as the capsule of the oil tube oil level gauge, the float of the float pointer oil level gauge, and the breakage of the telescopic rod, resulting in low accuracy of oil level monitoring. Summary of the invention

[0004] The embodiment of the present application provides a method and a related device for detecting the true oil level of transformer oil, which can calculate the real-time true oil level of transformer oil according to the real-time oil pressure at a first position and the oil pressure at a second position set at a preset height difference at the lower part of the oil drain pipe of the oil storage cabinet, so as to help staff observe the true oil level of transformer oil and improve the accuracy of transformer oil level monitoring.

[0005] A first aspect of an embodiment of the present application provides a method for detecting a true oil level of transformer oil, the method comprising:

[0006] Obtain transformer oil monitoring data and transformer parameter data;

[0007] Determine a first oil pressure and a second oil pressure according to the transformer oil monitoring data, wherein the first oil pressure and the second oil pressure are respectively the oil pressure at a first position and the oil pressure at a second position set at a preset height difference below the oil drain pipe of the oil conservator;

[0008] The actual oil level of the transformer oil is calculated according to the first oil pressure, the second oil pressure and transformer parameter data.

[0009] Furthermore, determining the first oil pressure and the second oil pressure according to the transformer oil monitoring data includes: using an electronic oil level gauge to measure the oil pressure at the first position and the oil pressure at the second position to determine the first oil pressure and the second oil pressure.

[0010] Furthermore, the actual oil level of the transformer oil is calculated according to the first oil pressure, the second oil pressure and the transformer parameter data, including:

[0011] Extracting the length of the oil drain pipe of the transformer oil storage cabinet, the first oil height corresponding to the first oil pressure, and the second oil height corresponding to the second oil pressure from the transformer parameter data;

[0012] Calculating a first height difference between the first oil height and the second oil height according to the first oil height and the second oil height;

[0013] A second height difference from the first oil height to the oil level is calculated based on the first height difference, the first oil pressure, and the second oil pressure;

[0014] The actual oil level of the transformer oil is calculated based on the second height difference and the length of the oil drain pipe of the transformer oil conservator.

[0015] Furthermore, the calculation formula of the second height difference is as follows:

[0016] h1=P1 / (P2-P1)*h3

[0017] Among them, h1 is the second height difference, h3 is the first height difference, P1 is the first oil pressure, and P2 is the second oil pressure.

[0018] Furthermore, it also includes:

[0019] Extracting transformer monitoring oil level from the transformer oil monitoring data;

[0020] Comparing the transformer monitored oil level with the transformer oil actual oil level to obtain an oil level monitoring data comparison result;

[0021] If the comparison result of the oil level monitoring data is inconsistent, a transformer oil level monitor failure alarm is issued;

[0022] If the comparison result of the oil level monitoring data is consistent, the transformer oil level monitor fault alarm is stopped.

[0023] In this example, the transformer oil monitoring data and transformer parameter data are first obtained, and then the oil pressure at the first position and the oil pressure at the second position set at a preset height difference at the lower part of the oil drain pipe of the oil conservator are determined according to the transformer oil monitoring data, and the first oil pressure and the second oil pressure are obtained. The real-time transformer oil level is calculated according to the first oil pressure and the second oil pressure, so as to help the staff observe the transformer oil level and improve the accuracy of transformer oil level monitoring.

[0024] A second aspect of an embodiment of the present application provides a transformer oil true oil level detection device, the device comprising:

[0025] An acquisition unit, used for acquiring transformer oil monitoring data and transformer parameter data;

[0026] a determination unit, configured to determine a first oil pressure intensity and a second oil pressure intensity according to the transformer oil monitoring data, wherein the first oil pressure intensity and the second oil pressure intensity are respectively the oil pressure intensity at a first position and the oil pressure intensity at a second position set at a preset height difference below the oil drain pipe of the oil conservator;

[0027] The processing unit is used to calculate the real oil level of the transformer oil according to the first oil pressure, the second oil pressure and the transformer parameter data.

[0028] Further, in the aspect of determining the first oil pressure intensity and the second oil pressure intensity according to the transformer oil monitoring data, the determining unit is used to:

[0029] The oil pressure at the first position and the oil pressure at the second position are measured using an electronic oil level gauge to determine the first oil pressure and the second oil pressure.

[0030] Further, in the aspect of calculating the real oil level of the transformer oil according to the first oil pressure, the second oil pressure and the transformer parameter data, the processing unit is used to:

[0031] Extracting the length of the oil drain pipe of the transformer oil storage cabinet, the first oil height corresponding to the first oil pressure, and the second oil height corresponding to the second oil pressure from the transformer parameter data;

[0032] Calculating a first height difference between the first oil height and the second oil height according to the first oil height and the second oil height;

[0033] A second height difference from the first oil height to the oil level is calculated based on the first height difference, the first oil pressure, and the second oil pressure;

[0034] The actual oil level of the transformer oil is calculated based on the second height difference and the length of the oil drain pipe of the transformer oil conservator.

[0035] Further, in the aspect of calculating the real oil level of the transformer oil according to the first oil pressure, the second oil pressure and the transformer parameter data, the calculation formula of the second height difference calculated by the processing unit is as follows:

[0036] h1=P1 / (P2-P1)*h3

[0037] Among them, h1 is the second height difference, h3 is the first height difference, P1 is the first oil pressure, and P2 is the second oil pressure.

[0038] A third aspect of an embodiment of the present application provides a terminal, comprising a processor, an input device, an output device and a memory, wherein the processor, input device, output device and memory are interconnected, wherein the memory is used to store a computer program, the computer program comprises program instructions, and the processor is configured to call the program instructions to execute the step instructions in the first aspect of the embodiment of the present application.

[0039] The fourth aspect of the embodiments of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program for electronic data exchange, wherein the computer program enables a computer to execute part or all of the steps described in the transformer oil true oil level detection method in the first aspect of the embodiments of the present application.

[0040] The fifth aspect of the embodiment of the present application provides a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to cause a computer to execute some or all of the steps described in the transformer oil true oil level detection method in the first aspect of the embodiment of the present application. The computer program product can be a software installation package. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0042] Figure 1 A schematic diagram of the overall process of a transformer oil true oil level detection method is provided for an embodiment of the present application;

[0043] Figure 2 A schematic diagram of specific steps of a transformer oil true oil level detection method for an oil true oil level estimation process is provided for an embodiment of the present application;

[0044] Figure 3 A specific scenario schematic diagram of a transformer oil true oil level detection method is provided for an embodiment of the present application;

[0045] Figure 4 A schematic structural diagram of a transformer oil true oil level detection device is provided for an embodiment of the present application;

[0046] Figure 5 A schematic diagram of the structure of a terminal provided in an embodiment of the present application;

[0047] Reference numerals:

[0048] Transformer-1, oil to be tested-2, first position sensor-3, second position sensor-4, oil conservator drain pipe-5, acquisition unit-6, determination unit-7, processing unit-8, alarm unit-9. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0050] The terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices.

[0051] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0052] In order to better understand the transformer oil true oil level detection method provided by the embodiment of the present application, the following first briefly introduces the scenario of the transformer oil true oil level detection method. The function of the oil pillow is to automatically adjust the oil level in the transformer. Too high an oil level may increase the internal oil pressure and cause oil overflow; too low an oil level may cause insulation failure under certain circumstances, and too low an oil level may expose the winding and the core, causing the risk of internal flashover and reducing the performance of the insulating oil. The oil pillow oil level gauge is the only device that displays the internal oil level when the transformer is operating normally, and its failure will cause the oil level to lose monitoring. When the power plant staff conducts inspections, they need to observe the oil level indication in the transformer oil level gauge to determine the oil level of the transformer. Since the existing transformer oil level gauge is generally a mechanical structure, it is easy to cause inaccurate oil level indication and false oil level problems due to damage to the capsule of the tube oil level gauge, the sticking of the float of the float pointer oil level gauge, and the breakage of the telescopic rod, etc., and the accuracy of oil level monitoring is low.

[0053] The transformer oil true oil level detection method is applied to the transformer oil true oil level detection device. Figure 1 The figure shows a schematic diagram of the overall process of a transformer oil true oil level detection method. Figure 1 As shown, including:

[0054] S1. Obtain transformer oil monitoring data and transformer parameter data. The transformer oil monitoring data includes pressure data and oil level data. The transformer parameter data includes length data of each component of the transformer.

[0055] S2. Determine a first oil pressure and a second oil pressure according to the transformer oil monitoring data, wherein the first oil pressure and the second oil pressure are respectively the oil pressure at a first position and the oil pressure at a second position set at a preset height difference below the oil drain pipe of the oil conservator.

[0056] S3, according to the first oil pressure, the second oil pressure and the transformer parameter data, calculate the real oil level of the transformer oil. Figure 2 A schematic diagram showing the specific steps of a transformer oil real oil level detection method for oil real oil level estimation process is shown. Figure 3 A specific scenario diagram of a transformer oil real oil level detection method is shown, such as Figures 2 to 3 As shown, including:

[0057] S301, extracting the length of the oil drain pipe of the transformer oil storage cabinet, the first oil height corresponding to the first oil pressure, and the second oil height corresponding to the second oil pressure from the transformer parameter data, and obtaining the first oil pressure P1 and the second oil pressure P2. In this example, an electronic oil level gauge is used to measure the oil pressure at the first position and the oil pressure at the second position to determine the first oil pressure and the second oil pressure. Figure 3 The length of the oil drain pipe 5 of the transformer oil conservator in the transformer parameter data is obtained. In this example, the electronic oil level gauge includes a first position sensor 3 and a second position sensor 4, which are used to calculate the oil level of the oil 2 to be measured in the transformer 1.

[0058] S302: Calculate a first height difference between the first oil height and the second oil height according to the first oil height and the second oil height. Since the height difference is preset at the lower part of the oil drain pipe of the oil storage cabinet, the height position where the first position sensor 3 is placed is subtracted from the height position where the second position sensor 4 is placed to obtain the first height difference h3.

[0059] S303, calculating a second height difference from the first oil height to the oil level according to the first height difference, the first oil pressure and the second oil pressure. In this embodiment, the calculation formula of the second height difference is as follows:

[0060] h1=P1 / (P2-P1)*h3

[0061] Wherein, h1 is the second height difference, h3 is the first height difference, P1 is the first oil pressure, and P2 is the second oil pressure. P1 and P2 are measured by the first position sensor and the second position sensor of the electronic oil level gauge, and h3 is confirmed in step S302.

[0062] S304, according to the second height difference and the length of the transformer oil conservator drain pipe 5, calculate the real oil level of the transformer oil. Since the length of the transformer oil conservator drain pipe 5 and the second height difference are known in the previous steps, Figure 3 As shown, the real oil level of the transformer oil can be obtained by subtracting the length of the transformer oil storage cabinet drain pipe 5 from the second height difference.

[0063] Furthermore, it also includes:

[0064] S4. Extracting the transformer monitoring oil level from the transformer oil monitoring data, where the transformer monitoring oil level is the oil level measured by a mechanical oil level gauge.

[0065] S5, comparing the transformer monitored oil level with the transformer oil real oil level, obtaining the oil level monitoring data comparison result, the transformer oil real oil is the real oil level calculated in step S3, comparing the two, whether the monitoring data of the mechanical oil level gauge is accurate, and obtaining the oil level monitoring data comparison result, including:

[0066] S501A. If the comparison result of the oil level monitoring data is inconsistent, a transformer oil level monitor fault alarm is issued to notify the staff to repair or replace the mechanical oil level gauge and promptly troubleshoot the equipment monitoring gauge fault.

[0067] S502B. If the comparison result of the oil level monitoring data is consistent, then stop issuing the transformer oil level monitor fault alarm, which proves that the monitoring result of the mechanical oil level gauge is accurate and there is no need to alarm the transformer oil level monitor.

[0068] In this example, the transformer oil monitoring data and transformer parameter data are first obtained, and then the oil pressure at the first position and the oil pressure at the second position set at a preset height difference at the lower part of the oil drain pipe of the oil conservator are determined according to the transformer oil monitoring data, and the first oil pressure and the second oil pressure are obtained. The real-time transformer oil level is calculated according to the first oil pressure and the second oil pressure, so as to help the staff observe the transformer oil level and improve the accuracy of transformer oil level monitoring.

[0069] In line with the above, see Figure 4 , Figure 4 The present application provides a schematic diagram of the structure of a transformer oil true oil level detection device. Figure 4 As shown, the device comprises:

[0070] An acquisition unit 6 is used to acquire transformer oil monitoring data and transformer parameter data;

[0071] A determination unit 7, configured to determine a first oil pressure and a second oil pressure according to the transformer oil monitoring data, wherein the first oil pressure and the second oil pressure are respectively the oil pressure at a first position and the oil pressure at a second position set at a preset height difference below the oil drain pipe of the oil conservator;

[0072] The processing unit 8 is used to calculate the real oil level of the transformer oil according to the first oil pressure, the second oil pressure and the transformer parameter data.

[0073] The alarm unit 9 is used to compare the monitored oil level of the transformer with the actual oil level of the transformer oil to obtain an oil level comparison result, and confirm the alarm mode according to the oil level comparison result.

[0074] In this example, the transformer oil monitoring data and transformer parameter data are first obtained, and then the oil pressure at the first position and the oil pressure at the second position set at a preset height difference at the lower part of the oil drain pipe of the oil conservator are determined according to the transformer oil monitoring data, and the first oil pressure and the second oil pressure are obtained. The real-time transformer oil level is calculated according to the first oil pressure and the second oil pressure, so as to help the staff observe the transformer oil level and improve the accuracy of transformer oil level monitoring.

[0075] In a possible implementation, in the aspect of determining the first oil pressure intensity and the second oil pressure intensity according to the transformer oil monitoring data, the determining unit is used to:

[0076] The oil pressure at the first position and the oil pressure at the second position are measured using an electronic oil level gauge to determine the first oil pressure and the second oil pressure.

[0077] In a possible implementation, in the aspect of calculating the real oil level of the transformer oil according to the first oil pressure, the second oil pressure and the transformer parameter data, the processing unit 8 is used to:

[0078] Extracting the length of the oil drain pipe of the transformer oil storage cabinet, the first oil height corresponding to the first oil pressure, and the second oil height corresponding to the second oil pressure from the transformer parameter data;

[0079] Calculating a first height difference between the first oil height and the second oil height according to the first oil height and the second oil height;

[0080] A second height difference from the first oil height to the oil level is calculated based on the first height difference, the first oil pressure, and the second oil pressure;

[0081] The actual oil level of the transformer oil is calculated based on the second height difference and the length of the oil drain pipe of the transformer oil conservator.

[0082] In a possible implementation, in the aspect of calculating the real oil level of the transformer oil according to the first oil pressure, the second oil pressure and the transformer parameter data, the calculation formula for calculating the second height difference by the processing unit 8 is as follows:

[0083] h1=P1 / (P2-P1)*h3

[0084] Among them, h1 is the second height difference, h3 is the first height difference, P1 is the first oil pressure, and P2 is the second oil pressure.

[0085] In a possible implementation, in the aspect of comparing the transformer monitored oil level with the transformer oil actual oil level to obtain an oil level comparison result, and confirming an alarm mode according to the oil level comparison result, the alarm unit 9 is used to:

[0086] Comparing the transformer monitored oil level with the transformer oil actual oil level to obtain an oil level monitoring data comparison result;

[0087] If the comparison result of the oil level monitoring data is inconsistent, a transformer oil level monitor failure alarm is issued;

[0088] If the comparison result of the oil level monitoring data is consistent, the transformer oil level monitor fault alarm is stopped.

[0089] For the above embodiments, please refer to Figure 4 , Figure 4 A schematic diagram of the structure of a terminal provided in an embodiment of the present application, as shown in the figure, includes a processor, an input device, an output device and a memory, the processor, the input device, the output device and the memory are interconnected, wherein the memory is used to store a computer program, the computer program includes program instructions, the processor is configured to call the program instructions, and the program includes instructions for executing the following steps;

[0090] Obtain transformer oil monitoring data and transformer parameter data;

[0091] Determine a first oil pressure and a second oil pressure according to the transformer oil monitoring data, wherein the first oil pressure and the second oil pressure are respectively the oil pressure at a first position and the oil pressure at a second position set at a preset height difference below the oil drain pipe of the oil conservator;

[0092] The actual oil level of the transformer oil is calculated according to the first oil pressure, the second oil pressure and transformer parameter data.

[0093] In this example, the transformer oil monitoring data and transformer parameter data are first obtained, and then the oil pressure at the first position and the oil pressure at the second position set at a preset height difference at the lower part of the oil drain pipe of the oil conservator are determined according to the transformer oil monitoring data, and the first oil pressure and the second oil pressure are obtained. The real-time transformer oil level is calculated according to the first oil pressure and the second oil pressure, so as to help the staff observe the transformer oil level and improve the accuracy of transformer oil level monitoring.

[0094] Furthermore, the electronic oil level gauge is introduced. The technical parameters of the electronic oil level gauge are as follows:

[0095] Working voltage: AC220V, 50HZ.

[0096] Pressure measurement range: 0~0.1MPa.

[0097] Sensor accuracy: 0.1% FS.

[0098] Height measurement range: 0~10m.

[0099] Device accuracy: ±15%.

[0100] Display mode: 350*480 color touch screen.

[0101] Communication function: wired communication.

[0102] Overall dimensions: length 180 x width 196 x height 390 mm.

[0103] It is suitable for oil level monitoring of capsule-type, diaphragm-type and longitudinal corrugated oil conservators of oil-immersed transformers in 110kV, 220kV, 330kV, 500kV, 750kV, 1100kV and other substations. By connecting the electronic oil level gauge with the oil filling and discharge pipeline flange under the oil conservator, the operating valve is connected to the oil conservator body to monitor the changes in the oil level of the oil conservator.

[0104] Furthermore, the position of the electronic oil level gauge is selected: a DY-21 electronic oil level gauge is installed on the oil filling and discharge pipe or drain outlet flange of the main transformer or reactor body oil storage cabinet.

[0105] This article introduces the installation method of the electronic pressure sensor of this solution, including:

[0106] The first installation method:

[0107] (1) Confirm that the valve at the original oil drain port is in the closed state and remove the valve plate at the lower end of the valve.

[0108] (2) Carefully install the appropriate gasket and secure it firmly with four M12X55 bolts (select the appropriate bolt length based on the flange thickness).

[0109] (3) Make sure that the device is securely fixed and then strictly close the valve under the installation device.

[0110] (4) Confirm again that the bleed screw on the original "installation flange" is in a tightly closed state.

[0111] (5) Place a 50L oil drum accurately under the electronic oil level gauge to ensure that it is in the correct position.

[0112] (6) Carefully remove the blind plate at the lower end of the electronic oil level gauge, slowly open the valve at the lower end of the electronic oil level gauge, and then quickly and fully open the original oil filling and draining valve handle to allow gas and part of the transformer oil to be discharged from the lower valve of the electronic oil level gauge. After 10 seconds from the valve being fully opened, close the lower valve of the electronic oil level gauge device in time, and the exhaust work is successfully completed.

[0113] The second installation method:

[0114] (1) Carefully take a small amount of oil sample from the oil sampling port of the main transformer or reactor, and slowly inject it into the electronic oil level gauge to be installed until it is full.

[0115] (2) Carefully confirm that the valve at the oil filling and discharge port of the original main transformer or reactor is in a completely closed state, then carefully remove the valve plate at the lower end of the valve and carefully select a suitable sealing gasket.

[0116] (3) Use four M12X55 bolts (select the appropriate bolt length based on the flange thickness) to securely fix the electronic oil level gauge.

[0117] (4) After the electronic oil level gauge is fixed, make sure that the lower valve at the bottom of the device is in a tightly closed state.

[0118] (5) Gently loosen the bleed screw on the "installation flange".

[0119] (6) Slowly open (control within 20 seconds or more) the valve at the lower end of the original main oil pillow or drain port to allow the gas to be discharged smoothly through the bleed screw. When a stable and bubble-free oil column continues to flow out, close it in time and tighten the bleed screw firmly to complete the exhaust work successfully.

[0120] The electronic oil level gauge calculates the height h1 through the above formula, subtracts the length of the oil drain pipe of the transformer oil conservator, and the result is the actual oil level height inside the transformer oil conservator. According to the transformer drawing, find out the diameter and length of the oil conservator and other dimensions. After conversion, the oil content inside the transformer oil conservator (displayed as a percentage of the oil conservator) is obtained as shown in the figure below. During operation, inspection personnel can compare the local display with the transformer oil conservator oil level gauge to promptly detect transformer oil level failures.

[0121] The electronic oil level gauge can effectively avoid the occurrence of "false oil level" caused by damaged oil level gauge capsule, stuck float of float pointer oil level gauge, broken telescopic rod, etc. At the same time, it is combined with mechanical pointer or magnetic flap oil level gauge to achieve double insurance of oil level monitoring, which greatly enhances the reliability of monitoring. In addition, this can not only improve the efficiency of inspection by operation and maintenance personnel, but also avoid the inconvenience of reading caused by the high installation position, small dial or dirty dial of the oil level gauge. Moreover, the real-time status monitoring function is especially suitable for unattended scenarios, which can significantly improve the perception ability of the main transformer status oil level, provide solid guarantee for the stable operation of power equipment, and further ensure the safety and efficiency of the power system.

[0122] The modular integrated design is highly integrated and can be installed without power outage. The entire installation process is extremely simple and convenient, greatly reducing the inconvenience and impact caused by the installation. It uses a high-precision pressure transmitter to accurately collect pressure signals in real time, and fully considers the influence of oil temperature on transformer oil density during the calculation process, thereby effectively reducing the error caused by oil temperature. The oil level realizes the function of on-site digital display, which significantly reduces the error that may be caused by manual reading and can more accurately reflect the oil level height in the oil pillow. In addition, it also has a powerful ability of real-time online monitoring, and can measure the oil level in the transformer oil storage cabinet in real time at any time. At the same time, it effectively avoids the errors caused by mechanical jamming and wear, and completely avoids the measurement and reading deviations caused by problems such as float damage, transmission gear wear, mechanical jamming, and meter dial contamination that often occur in traditional mechanical measurement methods.

[0123] This example proposes a transformer oil level detection system based on a dual pressure sensor, which is also called an electronic oil level gauge and has many significant advantages. It can accurately measure the oil level in the transformer oil storage cabinet quantitatively, in real time and remotely, and its measurement accuracy can fully meet the needs of accurate judgment of the oil level. During the measurement process, it is both safe and convenient, which greatly makes up for the limitations of the current on-site measurement methods for transformer oil level. This helps the inspection personnel to detect the defects of the oil level indicator in time, and effectively avoid the occurrence of the "false oil level" phenomenon. In addition, during installation, it will not damage the original structure of the transformer, the modification is less difficult, and it can be installed without power outages, which brings great convenience to practical applications.

[0124] The above mainly introduces the scheme of the embodiment of the present application from the perspective of the execution process on the method side. It is understandable that in order to realize the above functions, the terminal includes a hardware structure and / or software module corresponding to the execution of each function. Those skilled in the art should easily realize that, in combination with the units and algorithm steps of each example described in the embodiments provided herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0125] The embodiment of the present application can divide the terminal into functional units according to the above method example. For example, each functional unit can be divided according to each function, or two or more functions can be integrated into one processing unit. The above integrated unit can be implemented in the form of hardware or in the form of software functional units. It should be noted that the division of units in the embodiment of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation.

[0126] An embodiment of the present application also provides a computer storage medium, wherein the computer storage medium stores a computer program for electronic data exchange, and the computer program enables a computer to execute part or all of the steps of any transformer oil true oil level detection method recorded in the above method embodiments.

[0127] An embodiment of the present application also provides a computer program product, which includes a non-transitory computer-readable storage medium storing a computer program, and the computer program enables a computer to execute part or all of the steps of any transformer oil true oil level detection method recorded in the above method embodiments.

[0128] It should be noted that, for the aforementioned method embodiments, for the sake of simplicity, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the present application is not limited by the described order of actions, because according to the present application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present application.

[0129] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0130] In the several embodiments provided in the present application, it should be understood that the disclosed device can be implemented in other ways. For example, the device embodiments described above are only schematic, such as the division of the units, which is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, and the indirect coupling or communication connection of the device or unit can be electrical or other forms.

[0131] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0132] In addition, the functional units in the various embodiments of the application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated units may be implemented in the form of hardware or in the form of software program modules.

[0133] If the integrated unit is implemented in the form of a software program module and sold or used as an independent product, it can be stored in a computer-readable memory. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a memory, including a number of instructions to enable a computer device (which can be a personal computer, server or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned memory includes: U disk, read-only memory (ROM), random access memory (RAM), mobile hard disk, disk or optical disk and other media that can store program codes.

[0134] A person of ordinary skill in the art can understand that all or part of the steps in the various methods of the above embodiments can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable memory, which can include: a flash drive, a read-only memory, a random access memory, a magnetic disk or an optical disk, etc.

[0135] The embodiments of the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for general technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A method for detecting the true oil level of transformer oil, characterized in that: include: Obtain transformer oil monitoring data and transformer parameter data; Determine a first oil pressure and a second oil pressure according to the transformer oil monitoring data, wherein the first oil pressure and the second oil pressure are respectively the oil pressure at a first position and the oil pressure at a second position set at a preset height difference below the oil drain pipe of the oil conservator; The actual oil level of the transformer oil is calculated according to the first oil pressure, the second oil pressure and transformer parameter data.

2. The transformer oil level detection method according to claim 1, characterized in that: Determining the first oil pressure and the second oil pressure according to the transformer oil monitoring data includes: using an electronic oil level gauge to measure the oil pressure at the first position and the oil pressure at the second position to determine the first oil pressure and the second oil pressure.

3. The transformer oil level detection method according to claim 1, characterized in that: The step of calculating the transformer oil real level according to the first oil pressure, the second oil pressure and the transformer parameter data comprises: Extracting the length of the oil drain pipe of the transformer oil storage cabinet, the first oil height corresponding to the first oil pressure, and the second oil height corresponding to the second oil pressure from the transformer parameter data; Calculating a first height difference between the first oil height and the second oil height according to the first oil height and the second oil height; A second height difference from the first oil height to the oil level is calculated based on the first height difference, the first oil pressure, and the second oil pressure; The actual oil level of the transformer oil is calculated based on the second height difference and the length of the oil drain pipe of the transformer oil conservator.

4. The transformer oil level detection method according to claim 3, characterized in that: The calculation formula of the second height difference is as follows: h1=P1 / (P2-P1)*h3 Among them, h1 is the second height difference, h3 is the first height difference, P1 is the first oil pressure, and P2 is the second oil pressure.

5. The transformer oil level detection method according to claim 1, characterized in that: Also includes: Extracting transformer monitoring oil level from the transformer oil monitoring data; Comparing the transformer monitored oil level with the transformer oil actual oil level to obtain an oil level monitoring data comparison result; If the comparison result of the oil level monitoring data is inconsistent, a transformer oil level monitor failure alarm is issued; If the comparison result of the oil level monitoring data is consistent, the transformer oil level monitor fault alarm is stopped.

6. A transformer oil true oil level detection device, characterized in that: The device comprises: An acquisition unit, used for acquiring transformer oil monitoring data and transformer parameter data; a determination unit, configured to determine a first oil pressure intensity and a second oil pressure intensity according to the transformer oil monitoring data, wherein the first oil pressure intensity and the second oil pressure intensity are respectively the oil pressure intensity at a first position and the oil pressure intensity at a second position set at a preset height difference below the oil drain pipe of the oil conservator; The processing unit is used to calculate the real oil level of the transformer oil according to the first oil pressure, the second oil pressure and the transformer parameter data.

7. The transformer oil true oil level detection device according to claim 6, characterized in that: In the aspect of calculating the real oil level of the transformer oil according to the first oil pressure, the second oil pressure and the transformer parameter data, the processing unit is used for: Extracting the length of the oil drain pipe of the transformer oil storage cabinet, the first oil height corresponding to the first oil pressure, and the second oil height corresponding to the second oil pressure from the transformer parameter data; Calculating a first height difference between the first oil height and the second oil height according to the first oil height and the second oil height; A second height difference from the first oil height to the oil level is calculated based on the first height difference, the first oil pressure, and the second oil pressure; The actual oil level of the transformer oil is calculated based on the second height difference and the length of the oil drain pipe of the transformer oil conservator.

8. The transformer oil true oil level detection device according to claim 7, characterized in that: In the aspect of calculating the second height difference from the first oil height to the oil level according to the first height difference, the first oil pressure and the second oil pressure, the calculation formula of the second height difference is as follows: h1=P1 / (P2-P1)*h3 Among them, h1 is the second height difference, h3 is the first height difference, P1 is the first oil pressure, and P2 is the second oil pressure.

9. A terminal, characterized in that: The invention comprises a processor, an input device, an output device and a memory, wherein the processor, the input device, the output device and the memory are interconnected, wherein the memory is used to store a computer program, the computer program comprises program instructions, and the processor is configured to call the program instructions to execute the transformer oil true oil level detection method according to any one of claims 1 to 5.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, wherein the computer program includes program instructions, and when the program instructions are executed by a processor, the processor executes the transformer oil true oil level detection method according to any one of claims 1 to 5.

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