CN113567096B - Method and device for evaluating running state of converter transformer under no-load pressurization working condition with line - Google Patents
Method and device for evaluating running state of converter transformer under no-load pressurization working condition with line Download PDFInfo
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- CN113567096B CN113567096B CN202110663819.6A CN202110663819A CN113567096B CN 113567096 B CN113567096 B CN 113567096B CN 202110663819 A CN202110663819 A CN 202110663819A CN 113567096 B CN113567096 B CN 113567096B
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Abstract
The invention discloses an assessment method and a device for the idle running state of a converter transformer with a line, which comprises the following steps: detecting and collecting vibration signals of the oil tank body of the converter transformer in real time through a vibration acceleration sensor; when the electric quantity parameter of the direct current line where the converter transformer is located is monitored to meet a preset no-load pressurization running condition, carrying out Fourier decomposition on the vibration signal, and calculating to obtain vibration power corresponding to a preset first vibration frequency range; calculating a first accumulated vibration power corresponding to the first vibration frequency range and a second accumulated vibration power corresponding to a preset second vibration frequency range according to the vibration power; calculating the accumulated vibration power ratio actual measurement value of the first accumulated vibration power and the second accumulated vibration power, and obtaining the relative deviation of the accumulated vibration power ratio actual measurement value and the accumulated vibration power ratio calculation value; and judging the running state of the converter transformer according to the relative deviation. The invention can evaluate the no-load pressurization working condition running state of the converter transformer with the line.
Description
Technical Field
The invention belongs to the technical field of electric power, and particularly relates to a method and a device for evaluating the running state of a converter transformer under a no-load pressurizing working condition with a line.
Background
The converter transformer has high value and importance, and once abnormal faults occur, serious consequences and loss can be caused. The converter transformer can be subjected to various operating conditions during operation, and the identification of the operating conditions is helpful for evaluating the operating state of the converter transformer. The no-load pressurization of the converter transformer with the line is one of common operating conditions, the pressurization process of the converter transformer can be reflected by monitoring the voltage of the direct-current line, but the voltage belongs to an electrical quantity, the operating state of the converter transformer in the no-load pressurization process with the line cannot be comprehensively reflected, and the mechanical state of the converter transformer in the no-load pressurization process cannot be evaluated whether to be abnormal or not without considering the change characteristic of the mechanical state.
Disclosure of Invention
The invention provides a method, a device and a storage medium for evaluating the running state of a converter transformer under the no-load pressurizing working condition of a line, aiming at solving the problem that the running state of the converter transformer under the no-load pressurizing working condition of the line can not be comprehensively reflected in the prior art.
The embodiment of the invention provides a method for evaluating the running state of a converter transformer under a no-load pressurizing working condition with a line, which comprises the following steps:
detecting and collecting vibration signals of an oil tank body of the converter transformer in real time through a vibration acceleration sensor;
when the electrical quantity parameter of the direct current line where the converter transformer is located is monitored to meet a preset no-load pressurization running condition, performing Fourier decomposition on the vibration signal, and calculating to obtain vibration power corresponding to a preset first vibration frequency range;
according to the vibration power, calculating a first accumulated vibration power corresponding to the preset first vibration frequency range and a second accumulated vibration power corresponding to the preset second vibration frequency range; wherein the second vibration frequency range is within the first vibration frequency range;
calculating an accumulated vibration power ratio actual measurement value of the first accumulated vibration power and the second accumulated vibration power, and obtaining a relative deviation between the accumulated vibration power ratio actual measurement value and an accumulated vibration power ratio calculation value; the accumulated vibration power ratio calculation value is calculated according to the currently monitored electric quantity parameter of the direct current line;
and judging the running state of the converter transformer according to the relative deviation.
Further, the fourier decomposition of the vibration signal and the calculation of the vibration power corresponding to the preset first vibration frequency range specifically include:
carrying out Fourier decomposition on the vibration signal to obtain a vibration amplitude corresponding to a preset first vibration frequency range;
and calculating to obtain the vibration power corresponding to the preset first vibration frequency range according to the vibration amplitude.
Further, the determining the operating state of the converter transformer according to the relative deviation includes:
when the relative deviation is within a preset first relative deviation range, judging that the running state of the converter transformer is normal;
when the relative deviation is within a preset second relative deviation range, judging that the running state of the converter transformer is abnormal;
when the relative deviation is within a preset third relative deviation range, judging that the running state of the converter transformer is attention;
and when the relative deviation is within a preset fourth relative deviation range, judging that the running state of the converter transformer is serious.
Further, the calculating an accumulated vibration power ratio measured value of the first accumulated vibration power and the second accumulated vibration power includes:
calculating a cumulative vibration power ratio actual measurement value of the first cumulative vibration power and the second cumulative vibration power by the following equation:
wherein, PaIs the first accumulated vibration power, PbIs the second accumulated vibration power.
Further, the calculation value of the cumulative vibration power ratio is calculated according to the currently monitored electrical parameter of the direct current line, and includes:
the accumulated vibration power ratio calculation value is calculated according to the currently monitored electrical quantity parameter of the direct current line and through the following formula:
wherein A, B is a constant, UdThe current monitored voltage of the direct current line where the converter transformer is located.
Correspondingly, the embodiment of the invention also provides a device for evaluating the running state of the converter transformer under the line no-load pressurization working condition, which comprises a controller, wherein the controller is used for:
detecting and collecting vibration signals of an oil tank body of the converter transformer in real time through a vibration acceleration sensor;
when the electrical quantity parameter of the direct current line where the converter transformer is located is monitored to meet a preset no-load pressurization running condition, performing Fourier decomposition on the vibration signal, and calculating to obtain vibration power corresponding to a preset first vibration frequency range;
according to the vibration power, calculating a first accumulated vibration power corresponding to the preset first vibration frequency range and a second accumulated vibration power corresponding to the preset second vibration frequency range; wherein the second vibration frequency range is within the first vibration frequency range;
calculating an accumulated vibration power ratio actual measurement value of the first accumulated vibration power and the second accumulated vibration power, and obtaining a relative deviation between the accumulated vibration power ratio actual measurement value and an accumulated vibration power ratio calculation value; the accumulated vibration power ratio calculation value is calculated according to the currently monitored electric quantity parameter of the direct current line;
and judging the running state of the converter transformer according to the relative deviation.
An embodiment of the present invention further provides a computer-readable storage medium, where the computer-readable storage medium includes a stored computer program; when the computer program runs, the device where the computer readable storage medium is located is controlled to execute any one of the above methods for estimating the no-load pressurization condition operation state of the converter transformer with the line.
The embodiment of the invention also provides a device for evaluating the running state of the converter transformer under the no-load pressurizing working condition with the line, which comprises a processor, a memory and a computer program which is stored in the memory and configured to be executed by the processor, wherein the processor realizes any one of the methods for evaluating the running state of the converter transformer under the no-load pressurizing working condition with the line when executing the computer program
Compared with the prior art, the embodiment of the invention provides a method, a device and a storage medium for evaluating the no-load pressurization working condition running state of a converter transformer with a line, wherein a vibration acceleration sensor is used for detecting and acquiring a vibration signal of an oil tank body of the converter transformer in real time; when the electrical quantity parameter of the direct current line where the converter transformer is located is monitored to meet a preset no-load pressurization running condition, performing Fourier decomposition on the vibration signal, and calculating to obtain vibration power corresponding to a preset first vibration frequency range; according to the vibration power, calculating a first accumulated vibration power corresponding to the preset first vibration frequency range and a second accumulated vibration power corresponding to the preset second vibration frequency range; wherein the second vibration frequency range is within the first vibration frequency range; calculating an accumulated vibration power ratio actual measurement value of the first accumulated vibration power and the second accumulated vibration power, and obtaining a relative deviation between the accumulated vibration power ratio actual measurement value and an accumulated vibration power ratio calculation value; the accumulated vibration power ratio calculation value is calculated according to the currently monitored electric quantity parameter of the direct current line; and judging the running state of the converter transformer according to the relative deviation. The embodiment of the invention combines the direct current line monitoring with the vibration method, not only can reflect the no-load pressurization process of the converter transformer, but also can reflect the mechanical state change of the converter transformer in the no-load pressurization process with the line, thereby carrying out the running state evaluation of the no-load pressurization working condition of the converter transformer with the line.
Drawings
Fig. 1 is a schematic flowchart of a method for evaluating an empty-load running state of a converter transformer in accordance with an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an apparatus for evaluating an empty running state of a converter transformer with a line according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a schematic flow chart of the method for evaluating an empty load running state of a converter transformer provided by an embodiment of the present invention includes the following steps:
step S11, detecting and collecting vibration signals of the oil tank body of the converter transformer in real time through a vibration acceleration sensor;
specifically, in the embodiment of the invention, the vibration acceleration sensor is arranged in the middle upper area of the side wall of the oil tank parallel to the long axis of the converter transformer so as to detect and acquire the vibration signal of the oil tank body of the converter transformer in real time.
Step S12, when the electrical quantity parameter of the direct current line where the converter transformer is located is monitored to meet a preset no-load pressurization running condition, carrying out Fourier decomposition on the vibration signal, and calculating to obtain vibration power corresponding to a preset first vibration frequency range;
in a specific embodiment, when the voltage and the direct current power of a direct current line where the converter transformer is located are monitored to meet a preset no-load pressurization operation condition, performing fourier decomposition on the vibration signal, and calculating to obtain vibration power corresponding to a preset first vibration frequency range; preferably, when the converter transformer is a ± 800kV converter transformer, the preset no-load pressurization operating condition is the voltage U of the direct current linedReaching a rated DC voltage of +/-800 kV and the DC power PdAnd reaching a preset direct current power threshold value of 0.
Step S13, calculating a first accumulated vibration power corresponding to the preset first vibration frequency range and a second accumulated vibration power corresponding to the preset second vibration frequency range according to the vibration power; wherein the second vibration frequency range is within the first vibration frequency range;
it is understood that the first accumulated vibration power is an integral of the vibration power with respect to a preset first vibration frequency range, and the second accumulated vibration power is an integral of the vibration power with respect to a preset second vibration frequency range.
Step S14, calculating an accumulated vibration power ratio actual measurement value of the first accumulated vibration power and the second accumulated vibration power, and obtaining a relative deviation between the accumulated vibration power ratio actual measurement value and an accumulated vibration power ratio calculation value; the accumulated vibration power ratio calculation value is calculated according to the currently monitored electric quantity parameter of the direct current line;
and step S15, judging the running state of the converter transformer according to the relative deviation.
As an improvement of the above scheme, the performing fourier decomposition on the vibration signal and calculating to obtain the vibration power corresponding to the preset first vibration frequency range specifically includes:
carrying out Fourier decomposition on the vibration signal to obtain a vibration amplitude corresponding to a preset first vibration frequency range;
and calculating to obtain the vibration power corresponding to the preset first vibration frequency range according to the vibration amplitude.
It should be noted that the first vibration frequency range and the second vibration frequency range are not limited, and it is only necessary that the second vibration frequency range is within the first vibration frequency range. Preferably, Fourier decomposition is carried out on the vibration signal to obtain a vibration amplitude A corresponding to a preset first vibration frequency range of 0-2000 Hzi(ii) a Wherein i is an integer, i is more than or equal to 0 and less than or equal to 2000; according to the vibration amplitude AiAnd calculating to obtain the vibration power P corresponding to the preset first vibration frequency range of 0-2000 Hzi。
In particular, the vibration power P is determined according to the above embodimentiCalculating a first accumulated vibration power P corresponding to the preset first vibration frequency range of 0-2000 HzaA second accumulated vibration power P corresponding to a preset second vibration frequency range of 800-2000b(ii) a As can be understood, the preset first vibration frequency range is 0-2000 Hz corresponding to the first accumulated vibration power PaThe integral of the vibration power within the frequency range of 0-2000 Hz; a second accumulated vibration power P in a preset second vibration frequency range of 800-2000 HzbThe integral of the vibration power in the frequency range of 800-2000 Hz is obtained.
As an improvement of the above solution, the determining the operating state of the converter transformer according to the relative deviation includes:
when the relative deviation is within a preset first relative deviation range, judging that the running state of the converter transformer is normal;
when the relative deviation is within a preset second relative deviation range, judging that the running state of the converter transformer is abnormal;
when the relative deviation is within a preset third relative deviation range, judging that the running state of the converter transformer is attention;
and when the relative deviation is within a preset fourth relative deviation range, judging that the running state of the converter transformer is serious.
Specifically, in combination with the above embodiment, the relative deviation between the actual accumulated vibration power ratio measurement value and the calculated accumulated vibration power ratio value is obtained by the following formula:
wherein the content of the first and second substances,
beta is a calculated value of the accumulated vibration power ratio.
When alpha is less than or equal to 0.5, judging that the running state of the converter transformer is normal; when alpha is more than 0.5 and less than or equal to 2.0, judging that the running state of the converter transformer is abnormal; when alpha is more than 2.0 and less than or equal to 4.0, judging the running state of the converter transformer to be attention; and when the alpha is more than 4.0, judging that the operation state of the converter transformer is serious.
As an improvement of the above, the calculating an accumulated vibration power ratio actual measurement value of the first accumulated vibration power and the second accumulated vibration power includes:
calculating a cumulative vibration power ratio actual measurement value of the first cumulative vibration power and the second cumulative vibration power by the following equation:
wherein, PaIs the first accumulated vibration power, PbIs the second accumulated vibration power.
As an improvement of the above solution, the calculation value of the cumulative vibration power ratio is calculated according to a currently monitored parameter of the electrical quantity of the direct current line, and includes:
the accumulated vibration power ratio calculation value is calculated according to the currently monitored electrical quantity parameter of the direct current line and through the following formula:
wherein A, B is a constant, UdThe current monitored voltage of the direct current line where the converter transformer is located.
Correspondingly, the embodiment of the invention also provides a device for evaluating the running state of the converter transformer under the line no-load pressurization working condition, which comprises a controller, wherein the controller is used for:
detecting and collecting vibration signals of an oil tank body of the converter transformer in real time through a vibration acceleration sensor;
when the electrical quantity parameter of the direct current line where the converter transformer is located is monitored to meet a preset no-load pressurization running condition, performing Fourier decomposition on the vibration signal, and calculating to obtain vibration power corresponding to a preset first vibration frequency range;
according to the vibration power, calculating a first accumulated vibration power corresponding to the preset first vibration frequency range and a second accumulated vibration power corresponding to the preset second vibration frequency range; wherein the second vibration frequency range is within the first vibration frequency range;
calculating an accumulated vibration power ratio actual measurement value of the first accumulated vibration power and the second accumulated vibration power, and obtaining a relative deviation between the accumulated vibration power ratio actual measurement value and an accumulated vibration power ratio calculation value; the accumulated vibration power ratio calculation value is calculated according to the currently monitored electric quantity parameter of the direct current line;
and judging the running state of the converter transformer according to the relative deviation.
Preferably, the controller is further configured to:
carrying out Fourier decomposition on the vibration signal to obtain a vibration amplitude corresponding to a preset first vibration frequency range;
and calculating to obtain the vibration power corresponding to the preset first vibration frequency range according to the vibration amplitude.
Preferably, the controller is further configured to:
when the relative deviation is within a preset first relative deviation range, judging that the running state of the converter transformer is normal;
when the relative deviation is within a preset second relative deviation range, judging that the running state of the converter transformer is abnormal;
when the relative deviation is within a preset third relative deviation range, judging that the running state of the converter transformer is attention;
and when the relative deviation is within a preset fourth relative deviation range, judging that the running state of the converter transformer is serious.
Preferably, the controller is further configured to:
calculating a cumulative vibration power ratio actual measurement value of the first cumulative vibration power and the second cumulative vibration power by the following equation:
wherein, PaIs the first accumulated vibration power, PbIs the second accumulated vibration power.
Preferably, the controller is further configured to:
the accumulated vibration power ratio calculation value is calculated according to the currently monitored electrical quantity parameter of the direct current line and through the following formula:
wherein A, B is a constant, UdThe current monitored voltage of the direct current line where the converter transformer is located.
It should be noted that the device for evaluating the operating state of the converter transformer under the no-load pressurization condition with the line provided by the embodiment of the present invention can implement all the processes of the method for evaluating the operating state of the converter transformer under the no-load pressurization condition with the line described in any one of the embodiments, and the implemented technical effects are respectively the same as the functions and implemented technical effects of the method for evaluating the operating state of the converter transformer under the no-load pressurization condition with the line described in the embodiment, and are not described herein again.
An embodiment of the present invention further provides a computer-readable storage medium, where the computer-readable storage medium includes a stored computer program; when the computer program runs, the device where the computer readable storage medium is located is controlled to execute any one of the above methods for estimating the no-load pressurization condition operation state of the converter transformer with the line.
An embodiment of the present invention further provides a device for evaluating an operation state of a converter transformer with no-load pressurization condition of a line, referring to fig. 2, including a processor 10, a memory 20, and a computer program stored in the memory 20 and configured to be executed by the processor 10, where the processor 10, when executing the computer program, implements any one of the above methods for evaluating an operation state of a converter transformer with no-load pressurization condition of a line. Preferably, the computer program may be divided into one or more modules/units (e.g., computer program 1, computer program 2, … …) that are stored in the memory 20 and executed by the processor 10 to implement the present invention. The one or more modules/units may be a series of instruction segments of a computer program capable of performing specific functions, and the instruction segments are used for describing the execution process of the computer program in the device for evaluating the operation state of the converter transformer under the no-load and pressurized condition of the line.
The Processor 10 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a discrete Gate or transistor logic device, a discrete hardware component, etc., the general purpose Processor may be a microprocessor, or the Processor 10 may be any conventional Processor, the Processor 10 is a control center of the converter transformer no-load operation condition pressurized operation state evaluation device with lines, and various interfaces and lines are used to connect various parts of the converter transformer no-load operation condition pressurized operation state evaluation device with lines.
The memory 20 mainly includes a program storage area that may store an operating system, an application program required for at least one function, and the like, and a data storage area that may store related data and the like. In addition, the memory 20 may be a high speed random access memory, may also be a non-volatile memory, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash Card (Flash Card), and the like, or the memory 20 may also be other volatile solid state memory devices.
It should be noted that the above-mentioned device for evaluating the operation status of the converter transformer with no-load pressurization condition of the line may include, but is not limited to, a processor and a memory, and those skilled in the art will understand that the schematic diagram of the structure of fig. 2 is merely an example of the above-mentioned device for evaluating the operation status of the converter transformer with no-load pressurization condition of the line, and does not constitute a limitation of the device for evaluating the operation status of the converter transformer with no-load pressurization condition of the line, and may include more or less components than those shown in the drawings, or may combine some components, or different components.
To sum up, the method, the device and the storage medium for evaluating the no-load pressurization working condition running state of the converter transformer with the line provided by the embodiment of the invention detect and acquire the vibration signal of the oil tank body of the converter transformer in real time through the vibration acceleration sensor; when the electrical quantity parameter of the direct current line where the converter transformer is located is monitored to meet a preset no-load pressurization running condition, performing Fourier decomposition on the vibration signal, and calculating to obtain vibration power corresponding to a preset first vibration frequency range; according to the vibration power, calculating a first accumulated vibration power corresponding to the preset first vibration frequency range and a second accumulated vibration power corresponding to the preset second vibration frequency range; wherein the second vibration frequency range is within the first vibration frequency range; calculating an accumulated vibration power ratio actual measurement value of the first accumulated vibration power and the second accumulated vibration power, and obtaining a relative deviation between the accumulated vibration power ratio actual measurement value and an accumulated vibration power ratio calculation value; the accumulated vibration power ratio calculation value is calculated according to the currently monitored electric quantity parameter of the direct current line; and judging the running state of the converter transformer according to the relative deviation. The embodiment of the invention combines the direct current line monitoring with the vibration method, not only can reflect the no-load pressurization process of the converter transformer, but also can reflect the mechanical state change of the converter transformer in the no-load pressurization process with the line, thereby carrying out the running state evaluation of the no-load pressurization working condition of the converter transformer with the line.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (8)
1. A method for evaluating the running state of a converter transformer under the condition of no-load pressurization with a line is characterized by comprising the following steps:
detecting and collecting vibration signals of an oil tank body of the converter transformer in real time through a vibration acceleration sensor;
when the electrical quantity parameter of the direct current line where the converter transformer is located is monitored to meet a preset no-load pressurization running condition, performing Fourier decomposition on the vibration signal, and calculating to obtain vibration power corresponding to a preset first vibration frequency range;
according to the vibration power, calculating a first accumulated vibration power corresponding to the preset first vibration frequency range and a second accumulated vibration power corresponding to the preset second vibration frequency range; wherein the second vibration frequency range is within the first vibration frequency range;
calculating an accumulated vibration power ratio actual measurement value of the first accumulated vibration power and the second accumulated vibration power, and obtaining a relative deviation between the accumulated vibration power ratio actual measurement value and an accumulated vibration power ratio calculation value; the accumulated vibration power ratio calculation value is calculated according to the currently monitored electric quantity parameter of the direct current line;
and judging the running state of the converter transformer according to the relative deviation.
2. The method for evaluating the operation state of the converter transformer under the no-load pressurizing condition of the line according to claim 1, wherein the fourier decomposition of the vibration signal and the calculation of the vibration power corresponding to the preset first vibration frequency range comprise:
carrying out Fourier decomposition on the vibration signal to obtain a vibration amplitude corresponding to a preset first vibration frequency range;
and calculating to obtain the vibration power corresponding to the preset first vibration frequency range according to the vibration amplitude.
3. The method for evaluating the operation state of the converter transformer under the no-load pressurization condition of the converter transformer with the line according to claim 1, wherein the step of judging the operation state of the converter transformer according to the relative deviation comprises the following steps:
when the relative deviation is within a preset first relative deviation range, judging that the running state of the converter transformer is normal;
when the relative deviation is within a preset second relative deviation range, judging that the running state of the converter transformer is abnormal;
when the relative deviation is within a preset third relative deviation range, judging that the running state of the converter transformer is attention;
and when the relative deviation is within a preset fourth relative deviation range, judging that the running state of the converter transformer is serious.
4. The method for evaluating the operation status of a converter transformer under the no-load pressurization condition with line according to claim 1, wherein said calculating the ratio of the accumulated vibration power to the accumulated vibration power measured value of the first accumulated vibration power and the second accumulated vibration power comprises:
calculating a cumulative vibration power ratio actual measurement value of the first cumulative vibration power and the second cumulative vibration power by the following equation:
wherein, PaIs the first accumulated vibration power, PbIs the second accumulated vibration power.
5. The method for evaluating the operation state of the converter transformer under the no-load pressurization working condition of the line according to claim 1, wherein the calculation value of the cumulative vibration power ratio is calculated according to the currently monitored electrical parameter of the direct current line, and comprises the following steps:
the accumulated vibration power ratio calculation value is calculated according to the currently monitored electrical quantity parameter of the direct current line and through the following formula:
wherein A, B is a constant, UdThe current monitored voltage of the direct current line where the converter transformer is located.
6. The device for evaluating the running state of the converter transformer under the no-load pressurizing condition of the belt line is characterized by comprising a controller, wherein the controller is used for:
detecting and collecting vibration signals of an oil tank body of the converter transformer in real time through a vibration acceleration sensor;
when the electrical quantity parameter of the direct current line where the converter transformer is located is monitored to meet a preset no-load pressurization running condition, performing Fourier decomposition on the vibration signal, and calculating to obtain vibration power corresponding to a preset first vibration frequency range;
according to the vibration power, calculating a first accumulated vibration power corresponding to the preset first vibration frequency range and a second accumulated vibration power corresponding to the preset second vibration frequency range; wherein the second vibration frequency range is within the first vibration frequency range;
calculating an accumulated vibration power ratio actual measurement value of the first accumulated vibration power and the second accumulated vibration power, and obtaining a relative deviation between the accumulated vibration power ratio actual measurement value and an accumulated vibration power ratio calculation value; the accumulated vibration power ratio calculation value is calculated according to the currently monitored electric quantity parameter of the direct current line;
and judging the running state of the converter transformer according to the relative deviation.
7. A computer-readable storage medium, characterized in that the computer-readable storage medium comprises a stored computer program; the computer program controls equipment where the computer readable storage medium is located to execute the method for evaluating the operation state of the converter transformer with the line no-load pressurization condition when running according to any one of claims 1-5.
8. A converter transformer no-load pressurization condition operation state evaluation device with a line is characterized by comprising a processor, a memory and a computer program which is stored in the memory and configured to be executed by the processor, wherein the processor realizes the converter transformer no-load pressurization condition operation state evaluation method with the line according to any one of claims 1-5 when executing the computer program.
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| CN111413566B (en) * | 2020-04-20 | 2022-05-17 | 贵州电网有限责任公司 | Transformer direct-current magnetic bias judgment method based on vibration signal processing |
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