Transformer maintenance strategy determination method, device, system and storage medium

Abstract

The present invention discloses a method, device, system, and storage medium for determining a transformer maintenance strategy. The method comprises: obtaining an ultrasonic signal collected in real time during transformer operation; determining the amplitude and frequency of the ultrasonic signal; obtaining an audible sound signal collected in real time during transformer operation, upon determining that the amplitude and / or frequency of the ultrasonic signal meet predetermined conditions; determining the amplitude and frequency of the audible sound signal; and determining a transformer maintenance strategy based on the amplitude and frequency of the audible sound signal. The present invention solves the technical problem in related art of formulating transformer maintenance strategies based on audible sound signal detection during transformer operation, which results in inaccurate maintenance strategy determination and poor applicability.

Description

Technical Field

[0001] The present invention relates to the field of transformer monitoring, and in particular to a method, device, system and storage medium for determining a transformer maintenance strategy. Background Art

[0002] The power transformer is the core main equipment of the power system. Its safe and stable operation is crucial to the stability and economy of the power system. If a power transformer fails, especially an internal fault, the high-temperature arc generated by the short-circuit current will not only burn the insulation and core of the transformer winding, but also cause the transformer casing to deform or even explode, which will affect the safe and stable operation of the power system. The power transformer is a very important equipment in the power system. Once an accident occurs, it will cause great economic losses. Therefore, for substation maintenance personnel, quickly and accurately selecting the transformer maintenance strategy is the basis for ensuring the safe and stable operation of the power transformer. The transformer maintenance strategy in the related art, the common monitoring method is mainly based on the method of analyzing the transformer status based on audible sound signals, which is mainly used for the preliminary judgment of the transformer maintenance strategy. However, the formulation of the transformer maintenance strategy based only on the transformer with audible sound signals does not consider the problem comprehensively. At the same time, it cannot eliminate the influence of external sound signal interference, and cannot accurately and quickly select the appropriate transformer maintenance strategy.

[0003] To address the above-mentioned problems, no effective solutions have been proposed so far. Summary of the Invention

[0004] Embodiments of the present invention provide a method, device, system, and storage medium for determining a transformer maintenance strategy, so as to at least solve the technical problems in the related art of formulating a transformer maintenance strategy based on audible sound signal detection during transformer operation, such as inaccurate maintenance strategy determination and poor applicability.

[0005] According to one aspect of an embodiment of the present invention, a method for determining a transformer maintenance strategy is provided, comprising: obtaining an ultrasonic signal collected in real time during transformer operation; determining the amplitude and frequency of the ultrasonic signal; upon determining that the amplitude and / or frequency of the ultrasonic signal meet predetermined conditions, obtaining an audible sound signal collected in real time during transformer operation; determining the amplitude and frequency of the audible sound signal; and determining a transformer maintenance strategy based on the amplitude and frequency of the audible sound signal.

[0006] According to another aspect of an embodiment of the present invention, a system for determining a transformer maintenance strategy is provided, comprising: an ultrasonic signal acquisition device, an audible sound signal acquisition device, and a main control device, wherein the ultrasonic signal acquisition device is used to acquire ultrasonic signals in real time during the operation of the transformer; the main control device is connected to the ultrasonic signal acquisition device and is used to determine the amplitude and frequency of the ultrasonic signal, and upon determining that the amplitude and / or frequency of the ultrasonic signal meet predetermined conditions, send a start control signal to the audible sound signal acquisition device; the audible sound signal acquisition device is connected to the main control device and is used to acquire real-time audible sound signals during the operation of the transformer upon receiving the start control signal; the main control device is further used to determine the amplitude and frequency of the audible sound signal; and based on the amplitude and frequency of the audible sound signal, the maintenance strategy of the transformer is determined.

[0007] According to another aspect of an embodiment of the present invention, a device for determining a transformer maintenance strategy is provided, comprising: a first acquisition module for acquiring an ultrasonic signal acquired in real time during transformer operation; a first determination module for determining the amplitude and frequency of the ultrasonic signal; a second acquisition module for acquiring an audible sound signal acquired in real time during transformer operation, upon determining that the amplitude and / or frequency of the ultrasonic signal meet predetermined conditions; a second determination module for determining the amplitude and frequency of the audible sound signal; and a third determination module for determining a transformer maintenance strategy based on the amplitude and frequency of the audible sound signal.

[0008] According to another aspect of an embodiment of the present invention, a non-volatile storage medium is provided. The non-volatile storage medium stores a plurality of instructions, and the instructions are suitable for being loaded by a processor and executed by any one of the above-mentioned methods for determining a transformer maintenance strategy.

[0009] According to another aspect of an embodiment of the present invention, an electronic device is also provided, comprising one or more processors and a memory, wherein the memory is used to store one or more programs, wherein when the one or more programs are executed by the one or more processors, the one or more processors implement any one of the above-mentioned methods for determining a transformer maintenance strategy.

[0010] In an embodiment of the present invention, an ultrasonic signal collected in real time during transformer operation is obtained; the amplitude and frequency of the ultrasonic signal are determined; and when it is determined that the amplitude and / or frequency of the ultrasonic signal meet predetermined conditions, an audible sound signal collected in real time during transformer operation is obtained; the amplitude and frequency of the audible sound signal are determined; and a maintenance strategy for the transformer is determined based on the amplitude and frequency of the audible sound signal. This achieves the purpose of selectively selecting a maintenance strategy for the transformer by monitoring the ultrasonic and audible sound signals during transformer operation, thereby achieving the technical effect of improving the accuracy and applicability of transformer maintenance strategy determination. This further solves the technical problem in the related art of formulating transformer maintenance strategies based on audible sound signal detection during transformer operation, which results in inaccurate maintenance strategy determination and poor applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0012] Figure 1 is a schematic diagram of a method for determining a transformer maintenance strategy according to an embodiment of the present invention;

[0013] Figure 2 is a schematic diagram of an optional device for determining a transformer maintenance strategy according to an embodiment of the present invention;

[0014] Figure 3 is a schematic diagram of an optional method for determining a transformer maintenance strategy according to an embodiment of the present invention;

[0015] Figure 4 is a schematic diagram of a system for determining a transformer maintenance strategy according to an embodiment of the present invention;

[0016] Figure 5 2 is a schematic diagram of a device for determining a transformer maintenance strategy according to an embodiment of the present invention. DETAILED DESCRIPTION

[0017] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described 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 making creative efforts should fall within the scope of protection of the present invention.

[0018] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. 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 necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0019] First, to facilitate understanding of the embodiments of the present invention, some of the terms or nouns involved in the present invention are explained below:

[0020] Audible sound signals are sounds that can be heard with the naked ear, typically occurring within the human perceptible frequency range (20Hz-20kHz). Ultrasonic signals, on the other hand, are high-frequency signals outside this range (greater than 20kHz) and are inaudible to the naked ear. Therefore, technically, the most significant difference between audible sound and ultrasonic signals is their frequency range.

[0021] According to an embodiment of the present invention, a method embodiment for determining a transformer maintenance strategy is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0022] Figure 1 FIG. 1 is a flow chart of a method for determining a transformer maintenance strategy according to an embodiment of the present invention. Figure 1 As shown, the method includes the following steps:

[0023] Step S102: Acquire ultrasonic signals collected in real time during the operation of the transformer.

[0024] Optionally, the ultrasonic signal is collected in real time by an ultrasonic signal acquisition device (e.g., an ultrasonic signal sensor). One or more ultrasonic signal acquisition devices are located at predetermined locations on and within the transformer cavity. These devices are normally open during transformer operation and are used to collect, in real time, ultrasonic signals generated during transformer operation. These ultrasonic signals are acoustic signals with a frequency within a preset first frequency range (e.g., above 20 kHz).

[0025] Step S104: determining the amplitude and frequency of the ultrasonic signal.

[0026] Optionally, after the real-time collected ultrasonic signal is acquired, the ultrasonic signal is analyzed and calculated to determine the amplitude and frequency of the ultrasonic signal.

[0027] Step S106 : When it is determined that the amplitude and / or frequency of the ultrasonic signal meets a predetermined condition, an audible sound signal collected in real time during the operation of the transformer is obtained.

[0028] Optionally, the audible sound signal is collected in real time based on an audible sound signal collection device (such as an audible sound signal sensor). The audible sound signal collection device is one or more and is installed around the transformer. It should be noted that in the embodiment of the present invention, the audible sound signal during the operation of the transformer is not acquired in real time. The audible sound signal is collected only when the amplitude and / or frequency of the collected ultrasonic signal meets predetermined conditions. In other words, the audible sound signal collection device will only start working when the amplitude and / or frequency of the collected ultrasonic signal meet predetermined conditions. Otherwise, the audible sound signal collection device will not work, thereby achieving the purpose of reducing the use frequency of the audible sound signal collection device and increasing the service life of the audible sound signal collection device.

[0029] Optionally, the audible sound signal is a sound signal with a frequency within a preset second frequency range, for example, between 20 Hz (Hertz) and 20 kHz (Kilohertz), wherein the upper limit of the preset second frequency range is less than or equal to the lower limit of the preset first frequency range.

[0030] In an optional embodiment, upon determining that the amplitude and / or frequency of the ultrasonic signal satisfies predetermined conditions, obtaining the audible sound signal collected in real time during the operation of the transformer includes: upon determining that the amplitude of the ultrasonic signal is greater than a preset first amplitude, controlling the activation of an audible sound signal collection device; and receiving the audible sound signal collected in real time by the audible sound signal collection device during the operation of the transformer.

[0031] Optionally, the above-mentioned preset first amplitude is determined based on the corresponding ultrasonic signal amplitude when an obvious fault occurs inside the transformer. That is, by determining whether the amplitude of the transformer's ultrasonic signal is greater than the preset first amplitude (such as amplitude a), it can be determined whether the transformer has an obvious fault. The more serious the fault, the higher the acoustic signal energy and the corresponding higher the amplitude. In the above manner, when it is determined that the amplitude of the collected ultrasonic signal is greater than the preset first amplitude, it is determined that there is a high possibility that the transformer has an obvious fault. In order to further observe the fault condition of the transformer, the audible sound sensing device is directly controlled to start collecting the audible sound signal, without the need to determine the ultrasonic signal frequency, thereby simplifying the determination process. The transformer fault is determined by combining the ultrasonic signal and the audible sound signal, thereby achieving the purpose of improving the accuracy of the transformer fault determination.

[0032] In an optional embodiment, when it is determined that the amplitude and / or frequency of the ultrasonic signal meets a predetermined condition, obtaining the audible sound signal collected in real time during the operation of the transformer includes: when the amplitude of the ultrasonic signal is less than or equal to the preset first amplitude, determining whether there is a signal with a frequency greater than or equal to a preset first frequency threshold in the ultrasonic signal; when it is determined that there is no signal with a frequency greater than or equal to the preset first frequency threshold in the ultrasonic signal, determining a first amplitude ratio corresponding to signals with a frequency less than a preset second frequency threshold in the ultrasonic signal; and when the first amplitude ratio is greater than or equal to a preset first ratio, obtaining the audible sound signal collected in real time during the operation of the transformer.

[0033] Optionally, the above-mentioned preset first frequency threshold (such as XkHz) is determined based on the frequency of the acoustic signal collected when a minor fault occurs inside the transformer. By judging whether there is a signal with a frequency greater than or equal to the preset first frequency threshold in the above-mentioned ultrasonic signal, it can be preliminarily determined whether the transformer has a minor fault. In the case that there is a signal with a frequency greater than or equal to the above-mentioned preset first frequency threshold in the above-mentioned ultrasonic signal, it is determined that there is no fault in the transformer. At this time, the corresponding maintenance strategy is directly output to control the above-mentioned transformer to continue operating and to monitor the above-mentioned transformer in real time. The setting basis of the above-mentioned preset second frequency threshold (such as ykHz) is to avoid the fault signal frequency of the external ultrasonic signal due to loose bolts, etc., and is used to eliminate the interference of external ultrasonic signals due to loose bolts, etc. The proportion of the amplitude whose frequency is less than the preset second frequency threshold can reflect whether the frequency of the ultrasonic signal collected at this time is emitted by the transformer.

[0034] It can be understood that XkHz is equivalent to a threshold value. When a fault occurs within the transformer, if it is generally a minor fault, the main frequency will be mainly in the ultrasonic frequency band. If the fault is more serious, the main frequency will be mainly in the audible frequency band. Therefore, it can be considered that the main frequency is greater than XkHz in the case of a minor fault, and less than XkHz in the case of a serious fault. The main frequency corresponds to the frequency value with the highest amplitude among all frequencies corresponding to the ultrasonic signal. When the amplitude of the frequency less than the preset second frequency threshold accounts for a small proportion and is less than a preset first proportion (such as m%), it can be determined that the frequency of the collected ultrasonic signal at this time is interfered by external ultrasonic signals such as loose bolts. The transformer is not faulty at this time. At this time, the detection strategy for the direct output transformer is to control the above-mentioned transformer to continue operating and monitor the above-mentioned transformer in real time. When the amplitude of the frequency less than the preset second frequency threshold accounts for a large proportion and is greater than a preset first proportion (such as m%), it is necessary to start the audible sound signal acquisition device and control the audible sound signal acquisition device to start collecting audible sound signals. It is understandable that if the main frequency does not have a clear threshold characteristic, it can be determined by the proportion of low frequencies. A high proportion of low frequencies indicates a more serious fault. By combining ultrasonic and audible signals to determine transformer faults, the accuracy of transformer fault determination is improved.

[0035] In an optional embodiment, the above method also includes: when it is determined that there is a signal in the above ultrasonic signal whose frequency is greater than or equal to the above preset first frequency threshold, or the above first amplitude accounts for less than the above preset first ratio, determining the above maintenance strategy as: controlling the above transformer to continue operating and performing real-time monitoring of the above transformer.

[0036] Optionally, the above-mentioned preset first frequency threshold (such as XkHz) is determined based on the sound frequency when a minor fault occurs inside the transformer. By judging whether there is a signal with a frequency greater than or equal to the preset first frequency threshold in the above-mentioned ultrasonic signal, it can be preliminarily determined whether the transformer has a minor fault. In the case that there is a signal with a frequency greater than or equal to the above-mentioned preset first frequency threshold in the above-mentioned ultrasonic signal, it is determined that the transformer does not have a fault. The fact that the above-mentioned transformer does not have a fault can be understood as the absence of an obvious fault that affects the operation of the transformer. At this time, the corresponding maintenance strategy directly output is to control the above-mentioned transformer to continue to operate and to monitor the above-mentioned transformer in real time.

[0037] Optionally, the setting basis of the above-mentioned preset second frequency threshold (such as ykHz) is to avoid the fault signal frequency of the external ultrasonic signal due to loose bolts, etc., and is used to eliminate the interference of external ultrasonic signals due to loose bolts, etc. The ratio of the amplitude of the frequency less than the preset second frequency threshold can reflect whether the frequency of the ultrasonic signal collected at this time is emitted by the transformer. When the ratio of the amplitude of the frequency less than the preset second frequency threshold is small and less than the preset first ratio (such as m%), it can be determined that there is interference from external ultrasonic signals such as loose bolts in the frequency of the ultrasonic signal collected at this time, and the transformer does not have a fault at this time. At this time, the detection strategy of directly outputting the transformer is to control the above-mentioned transformer to continue to operate and to perform real-time monitoring of the above-mentioned transformer.

[0038] Step S108: determining the amplitude and frequency of the audible sound signal.

[0039] Optionally, after the audible sound signal acquisition device is started to acquire the audible sound signal, the audible sound signal is analyzed and calculated to determine the amplitude and frequency of the ultrasonic signal.

[0040] Step S110: determining a maintenance strategy for the transformer based on the amplitude and frequency of the audible signal.

[0041] It can be understood that the amplitude and frequency of the ultrasonic signal can be used for preliminary transformer fault detection. When the frequency and amplitude of the ultrasonic signal meet certain conditions, transformer fault detection can be further performed based on the acquired replica and frequency of the audible sound signal, and a corresponding transformer maintenance strategy can be formulated. In this way, the diagnosis and guidance of transformer faults combine both audible and ultrasonic signals, avoiding both false trips caused by diagnosis with only an acoustic signal and accidents caused by delayed diagnosis due to the slow response of the ultrasonic signal.

[0042] In an optional embodiment, determining a maintenance strategy for the transformer based on the amplitude and frequency of the audible sound signal includes: obtaining a second amplitude ratio corresponding to signals having a frequency less than a preset third frequency threshold in the audible sound signal; and if the second amplitude ratio is greater than or equal to a preset second ratio, determining the maintenance strategy as: controlling the transformer to continue operating and controlling the collection of oil samples from the transformer.

[0043] Optionally, the preset third frequency threshold (e.g., zkHz) is set based on avoiding frequencies of audible sound signals due to external background noise. The proportion of amplitudes with frequencies less than the preset third frequency threshold can be used to determine whether the currently collected audible sound signal is interfered with by audible sound signals from external background noise. When the proportion of amplitudes with frequencies less than the preset third frequency threshold is small and less than a preset second proportion (e.g., m%), it is determined that the currently collected audible sound signal is primarily interfered with by external background noise. In this case, the transformer is determined to be fault-free, and a corresponding maintenance strategy is output, controlling the transformer to continue operating and controlling the collection of oil samples from the transformer.

[0044] In an optional embodiment, the method further includes: when the proportion of the second amplitude is less than the preset second proportion, determining the maintenance strategy as: controlling the transformer to continue operating and performing real-time monitoring on the transformer.

[0045] Optionally, when the amplitude of the frequency less than the preset third frequency threshold accounts for a large proportion and is greater than the preset second proportion (such as m%), it indicates that the frequency amplitude at this time has little correlation with the external background noise, and is mainly caused by the transformer itself. At this time, it is determined that there is a certain fault in the transformer, and the corresponding maintenance strategy is determined as: control the above-mentioned transformer to continue operating, and monitor the above-mentioned transformer in real time.

[0046] Through the above steps S102 to S110, the purpose of selecting a transformer maintenance strategy in a targeted manner by monitoring the ultrasonic signal and the audible sound signal during the operation of the transformer can be achieved, thereby achieving the technical effect of improving the accuracy and applicability of the transformer maintenance strategy determination, and further solving the technical problem of inaccurate maintenance strategy determination and poor applicability in the related art of formulating transformer maintenance strategies based on audible sound signal detection during the operation of the transformer.

[0047] Based on the above embodiments and optional embodiments, the present invention proposes an optional implementation mode: Figure 2 is a schematic diagram of an optional device for determining a transformer maintenance strategy according to an embodiment of the present invention, such as Figure 2 As shown, the device includes: an ultrasonic signal sensing module 1, an audible sound signal sensing module 2, an audible sound signal analysis module 3, an ultrasonic signal analysis module 4, and a result judgment module 5, wherein the ultrasonic signal sensing module 1, the audible sound signal sensing module 2, the audible sound signal analysis module 3, the ultrasonic signal analysis module 4, and the result judgment module 5; the ultrasonic signal sensing module 1 is connected to the ultrasonic signal analysis module 4, the ultrasonic signal analysis module 4 is connected to the result judgment module 5, the audible sound signal module 2 is connected to the audible sound signal analysis module 3, and the audible sound signal analysis module 3 is connected to the result judgment module 5.

[0048] The ultrasonic signal sensing module 1 is arranged at a suitable position on the cavity surface and inside the cavity, and is used to collect the running ultrasonic signal and transmit it to the ultrasonic signal analysis module 4.

[0049] The audible sound signal sensing module 2 is arranged at a suitable position around the cavity, and is used to collect the audible sound signal in operation and transmit it to the audible sound signal analysis module 3 .

[0050] The ultrasonic signal analysis module 4 is used to receive and process the signal from the ultrasonic signal sensing module 1 , calculate the amplitude and frequency of the ultrasonic signal, compare the result with the threshold, and finally transmit the comparison result to the result judgment module 5 .

[0051] The audible sound signal sensing module 2 is used to collect the running audible sound signal and transmit it to the audible sound signal analysis module 3 after receiving the signal from the result judgment module 5 .

[0052] The audible sound signal analysis module 3 is used to receive and process the signal from the audible sound signal sensing module 2 , calculate the characteristic main frequency of the audible sound signal, compare the result with the threshold, and finally transmit the comparison result to the result judgment module 5 .

[0053] The above-mentioned result judgment module 5 is used to receive signals from the ultrasonic signal analysis module 4. Depending on the judgment results, it directly gives monitoring guidance or further sends signals to the audible sound signal sensing module 2 and receives information from the audible sound signal analysis module 3. Finally, it gives guidance based on the results of the audible sound signal analysis module 3 and the ultrasonic signal analysis module 4, and outputs the corresponding detection strategy.

[0054] The ultrasonic signal analysis module 4 is used to analyze the ultrasonic signal collected by the ultrasonic signal sensing module 1 and transmit the final result to the result judgment module 5 through multi-segment analysis of the ultrasonic signal amplitude and frequency.

[0055] The audible sound signal analysis module 3 is used to analyze the audible sound signal collected by the audible sound signal sensing module 2 , obtain the final result by analyzing the proportion of the characteristic main frequency in the audible sound signal, and transmit it to the signal judgment module 5 .

[0056] Upon receiving abnormality information from ultrasonic signal sensing module 1, ultrasonic signal analysis module 4 analyzes the signal's frequency and amplitude and transmits the results to result judgment module 5. If the analysis indicates a positive fault, result judgment module 5 directly issues guidance, bypassing audible signal sensing module 2. If the analysis indicates a possible fault, result judgment module 5 retains the fault information and sends a signal to audible signal sensing module 2 to measure the audible signal. Audible signal analysis module 3 then analyzes the signal and transmits the results back to result judgment module 5. After receiving the signal from audible signal analysis module 4, the result judgment module issues guidance based on the combined results.

[0057] Based on the above embodiments and optional embodiments, the present invention proposes an optional implementation mode: Figure 3 is a flow chart of an optional method for determining a transformer maintenance strategy according to an embodiment of the present invention, such as Figure 3 As shown, the method includes:

[0058] Step S1: Install the ultrasonic signal sensing module 1 at appropriate locations on the outer wall of the cavity and inside the cavity, and install the audible sound signal sensing module 2 at appropriate locations around the cavity. Connect the ultrasonic signal sensing module 1 to the ultrasonic signal analysis module 4, and connect the audible sound signal sensing module 2 to the audible sound signal analysis module 3. Finally, connect the ultrasonic signal analysis module 4 and the audible sound signal analysis module 3 to the result judgment module 5, and connect the result judgment module 5 to the audible sound signal sensing module 2.

[0059] Step S2: The ultrasonic signal acoustic sensing module 1 starts to collect the cavity ultrasonic signal and transmits it to the ultrasonic signal analysis module 4.

[0060] Step S3: The ultrasonic signal analysis module 4 analyzes the acoustic signal and first calculates the amplitude and frequency of the collected ultrasonic signal. When the amplitude of the ultrasonic signal is higher than the threshold a, step S7 is executed; when the amplitude is lower than the threshold a, step S4 is executed.

[0061] Step S4: The ultrasonic signal analysis module 4 calculates the frequency of the ultrasonic signal. If all frequencies of the ultrasonic signal are above X kHz, step S12 is executed; if all frequencies are below X kHz, step S5 is executed.

[0062] Step S5: The ultrasonic signal analysis module 4 further analyzes the amplitude ratio of frequencies below ykHz in the ultrasonic signal: if the amplitude ratio (i.e., energy ratio) of frequencies below ykHz in the ultrasonic signal is above 75%, step S7 is executed; if the ratio is below 75%, step S6 is executed.

[0063] Step S6: The ultrasonic signal analysis module 4 further monitors the ultrasonic signal. If the signal amplitude below y kHz in the ultrasonic signal increases within a period of time and the corresponding amplitude ratio increases to more than 75%, step S7 is executed; otherwise, step S12 is executed.

[0064] Step S7: The ultrasonic signal analysis module 4 transmits the result to the result judgment module 5, and the result judgment module 5 retains the result and sends a signal to the audible signal sensing module 2 to start audible signal monitoring.

[0065] Step S8 : the audible sound signal sensor 2 receives the signal from the result judgment module 5 and starts to collect the audible sound signal and transmits it to the audible sound signal analysis module 3 .

[0066] Step S9: The audible sound signal analysis module 3 analyzes the amplitude ratio of the transmitted audible sound signal at frequencies below zkHz. If the amplitude ratio of the audible sound signal at frequencies below zkHz is greater than 75%, step S10 is executed; otherwise, step S11 is executed.

[0067] Step S10: the audible signal analysis module 3 transmits the result to the result judgment module 5, and the result judgment module 5 outputs the result "no need to stop the machine, the oil sample is further analyzed".

[0068] Step S11: the audible signal analysis module 3 transmits the result to the result judgment module 5, and the result judgment module 5 outputs the result "no need to stop, keep monitoring".

[0069] Step S12: The ultrasonic signal analysis module 4 transmits the result to the result judgment module 5, and the result judgment module 5 outputs the result "no need to stop, keep monitoring".

[0070] Optionally, in step S1, the ultrasonic signal sensing module 1 remains normally open to measure ultrasonic information in real time; the audible sound signal sensing module 2 remains normally closed, measuring audible sound signal information only upon receiving an open signal from the result judgment module 5, thereby increasing the lifespan of the audible sound signal sensing module 2. In step S3, the ultrasonic signal amplitude threshold a is set based on the ultrasonic signal amplitude when a significant internal transformer fault occurs. In step S4, the ultrasonic signal frequency threshold x kHz is set based on the sound frequency when a minor internal transformer fault occurs. In step S5, the sound signal frequency threshold y kHz is set based on avoiding the fault signal frequency of external ultrasonic signals due to loose bolts, etc. In step S9, the audible sound signal frequency threshold z kHz is set based on avoiding the frequency of audible sound signals due to external background noise. Steps S10, S11, and S12 combine audible and ultrasonic signals for transformer fault diagnosis and guidance, thereby avoiding both malfunctions caused by single acoustic signal diagnosis and accidents caused by untimely diagnosis due to slow ultrasonic signal response.

[0071] It should be noted that in this embodiment of the present invention, real-time monitoring of the transformer's ultrasonic signals can provide a preliminary assessment of the transformer's fault condition. Furthermore, conditionally enabled audible signal monitoring enables sensitive and timely monitoring of the transformer's operating status and provision of guidance, while ensuring no false trips. Compared to traditional methods, this reduces unnecessary shutdowns and ensures timely and accurate protection responses.

[0072] According to an embodiment of the present invention, a system embodiment for implementing the above-mentioned method for determining a transformer maintenance strategy is also provided. Figure 4 FIG. 1 is a structural diagram of a system for determining a transformer maintenance strategy according to an embodiment of the present invention. Figure 4 As shown, the above-mentioned system for determining transformer maintenance strategy includes: ultrasonic signal acquisition device 400, audible signal acquisition device 402, and main control device 404, wherein:

[0073] The ultrasonic signal acquisition device 400 is used to collect ultrasonic signals in real time during the operation of the transformer;

[0074] The main control device 402 is connected to the ultrasonic signal acquisition device 400 and is used to determine the amplitude and frequency of the ultrasonic signal and, if it is determined that the amplitude and / or frequency of the ultrasonic signal meets a predetermined condition, send a start control signal to the audible sound signal acquisition device;

[0075] The audible sound signal acquisition device 402 is connected to the main control device 400 and is used to collect real-time audible sound signals during the operation of the transformer when the startup control signal is received;

[0076] The main control device 402 is further configured to determine the amplitude and frequency of the audible signal; and determine a maintenance strategy for the transformer based on the amplitude and frequency of the audible signal.

[0077] In an embodiment of the present invention, the ultrasonic signal acquisition device 400 is provided to collect ultrasonic signals in real time during the operation of the transformer; the main control device 402 is connected to the ultrasonic signal acquisition device 400 to determine the amplitude and frequency of the ultrasonic signal, and when it is determined that the amplitude and / or frequency of the ultrasonic signal meet predetermined conditions, a start control signal is sent to the audible signal acquisition device; the audible signal acquisition device 402 is connected to the main control device 400 to collect the real-time audible signals during the operation of the transformer when the start control signal is received. Audible sound signal; the main control device 402 is further used to determine the amplitude and frequency of the audible sound signal; based on the amplitude and frequency of the audible sound signal, the maintenance strategy of the transformer is determined, thereby achieving the purpose of selecting the maintenance strategy of the transformer in a targeted manner by monitoring the ultrasonic signal and the audible sound signal during the operation of the transformer, thereby achieving the technical effect of improving the accuracy and applicability of the determination of the transformer maintenance strategy, and further solving the technical problems in the related art of formulating the transformer maintenance strategy based on the detection of the audible sound signal during the operation of the transformer, such as inaccurate determination of the maintenance strategy and poor applicability.

[0078] It should be noted that the Figure 4 The specific structure of the transformer maintenance strategy determination system shown in is only for illustration. In specific applications, the transformer maintenance strategy determination system in this application can be compared to Figure 4 The transformer maintenance strategy determination system shown has more or less structure.

[0079] It should be noted that any optional or preferred method for determining a transformer maintenance strategy in the above method embodiments can be executed or implemented in the transformer maintenance strategy determination system provided in this embodiment.

[0080] In addition, it should be noted that the optional or preferred implementation of this embodiment can be found in the relevant description in the method embodiment, which will not be repeated here.

[0081] This embodiment also provides a device for determining a transformer maintenance strategy. This device is used to implement the above-mentioned embodiments and preferred implementations, and details already described will not be repeated. As used below, the terms "module" and "device" may refer to a combination of software and / or hardware that implements a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, implementation using hardware, or a combination of software and hardware, is also possible and contemplated.

[0082] According to an embodiment of the present invention, there is also provided an embodiment of a device for implementing the above-mentioned method for determining a transformer maintenance strategy. Figure 5 FIG. 1 is a schematic diagram of a structure of a device for determining a transformer maintenance strategy according to an embodiment of the present invention. Figure 5 As shown, the above-mentioned device for determining the transformer maintenance strategy includes: a first acquisition module 500, a first determination module 502, a second acquisition module 504, a second determination module 506, and a third determination module 508, wherein:

[0083] The first acquisition module 500 is used to acquire ultrasonic signals collected in real time during the operation of the transformer;

[0084] The first determining module 502 is connected to the first acquiring module 500 and is used to determine the amplitude and frequency of the ultrasonic signal;

[0085] The second acquisition module 504 is connected to the first determination module 502 and is configured to acquire the audible sound signal collected in real time during the operation of the transformer when it is determined that the amplitude and / or frequency of the ultrasonic signal meets a predetermined condition;

[0086] The second determining module 506 is connected to the second acquiring module 504 and is configured to determine the amplitude and frequency of the audible sound signal;

[0087] The third determination module 508 is connected to the second determination module 506 and is configured to determine a maintenance strategy for the transformer based on the amplitude and frequency of the audible signal.

[0088] In an embodiment of the present invention, the first acquisition module 500 is provided to acquire the ultrasonic signal collected in real time during the operation of the transformer; the first determination module 502 is connected to the first acquisition module 500 and is used to determine the amplitude and frequency of the ultrasonic signal; the second acquisition module 504 is connected to the first determination module 502 and is used to acquire the audible sound signal collected in real time during the operation of the transformer when it is determined that the amplitude and / or frequency of the ultrasonic signal meet predetermined conditions; the second determination module 506 is connected to the second acquisition module 504 and is used to determine the audible sound signal collected in real time during the operation of the transformer. The amplitude and frequency of the acoustic signal; the third determination module 508 is connected to the second determination module 506, and is used to determine the maintenance strategy of the transformer based on the amplitude and frequency of the audible sound signal, thereby achieving the purpose of selecting the maintenance strategy of the transformer in a targeted manner by monitoring the ultrasonic signal and the audible sound signal during the operation of the transformer, thereby achieving the technical effect of improving the accuracy and applicability of the determination of the transformer maintenance strategy, and further solving the technical problems in the related art of formulating the transformer maintenance strategy based on the detection of audible sound signals during the operation of the transformer, such as inaccurate maintenance strategy determination and poor applicability.

[0089] It should be noted that the above modules can be implemented by software or hardware. For example, for the latter, it can be implemented in the following ways: the above modules can be located in the same processor; or the above modules can be located in different processors in any combination.

[0090] It should be noted that the first acquisition module 500, first determination module 502, second acquisition module 504, second determination module 506, and third determination module 508 described above correspond to steps S102 to S110 in the embodiment. The examples and application scenarios implemented by these modules and corresponding steps are the same, but are not limited to the contents disclosed in the above embodiment. It should be noted that the above modules, as part of the device, can be run on a computer terminal.

[0091] It should be noted that the optional or preferred implementation of this embodiment can be found in the relevant description in the embodiment, which will not be repeated here.

[0092] The above-mentioned transformer maintenance strategy determination device may further include a processor and a memory. The above-mentioned first acquisition module 500, first determination module 502, second acquisition module 504, second determination module 506, third determination module 508, etc. are all stored in the memory as program modules, and the processor executes the above-mentioned program modules stored in the memory to implement corresponding functions.

[0093] The processor includes a core, which retrieves corresponding program modules from memory. There can be one or more cores. Memory may include non-permanent memory in a computer-readable medium, random access memory (RAM), and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory includes at least one memory chip.

[0094] According to an embodiment of the present application, an embodiment of a non-volatile storage medium is also provided. Optionally, in this embodiment, the non-volatile storage medium includes a stored program, wherein, when the program is executed, the device containing the non-volatile storage medium is controlled to execute any of the above-mentioned methods for determining a transformer maintenance strategy.

[0095] Optionally, in this embodiment, the non-volatile storage medium may be located in any computer terminal in a computer terminal group in a computer network, or in any mobile terminal in a mobile terminal group, and the non-volatile storage medium includes a stored program.

[0096] Optionally, when the program is running, the device where the non-volatile storage medium is located is controlled to perform the following functions: obtaining an ultrasonic signal collected in real time during the operation of the transformer; determining the amplitude and frequency of the ultrasonic signal; when it is determined that the amplitude and / or frequency of the ultrasonic signal meet predetermined conditions, obtaining an audible sound signal collected in real time during the operation of the transformer; determining the amplitude and frequency of the audible sound signal; and determining a maintenance strategy for the transformer based on the amplitude and frequency of the audible sound signal.

[0097] According to an embodiment of the present application, a processor embodiment is further provided. Optionally, in this embodiment, the processor is configured to run a program, wherein when the program is run, any one of the above-mentioned methods for determining a transformer maintenance strategy is executed.

[0098] According to an embodiment of the present application, an embodiment of a computer program product is also provided. When executed on a data processing device, it is suitable for executing a program that initializes any one of the above-mentioned steps of the method for determining a transformer maintenance strategy.

[0099] Optionally, the computer program product, when executed on a data processing device, is adapted to execute a program that initializes the following method steps: obtaining an ultrasonic signal collected in real time during the operation of the transformer; determining the amplitude and frequency of the ultrasonic signal; upon determining that the amplitude and / or frequency of the ultrasonic signal meet predetermined conditions, obtaining an audible sound signal collected in real time during the operation of the transformer; determining the amplitude and frequency of the audible sound signal; and determining a maintenance strategy for the transformer based on the amplitude and frequency of the audible sound signal.

[0100] An embodiment of the present invention provides an electronic device, comprising a processor, a memory, and a program stored in the memory and executable on the processor. When the processor executes the program, the following steps are implemented: obtaining an ultrasonic signal collected in real time during operation of a transformer; determining the amplitude and frequency of the ultrasonic signal; upon determining that the amplitude and / or frequency of the ultrasonic signal meet predetermined conditions, obtaining an audible sound signal collected in real time during operation of the transformer; determining the amplitude and frequency of the audible sound signal; and determining a maintenance strategy for the transformer based on the amplitude and frequency of the audible sound signal.

[0101] The serial numbers of the above embodiments of the present invention are for description only and do not represent the advantages or disadvantages of the embodiments.

[0102] In the above embodiments of the present invention, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0103] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only exemplary. For example, the division of the above modules can be a logical function division. In actual implementation, there may be other division methods, such as multiple modules 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, modules or indirect coupling or communication connection of modules, which can be electrical or other forms.

[0104] The modules described above as separate components may or may not be physically separate, and the components shown as modules may or may not be physical modules, that is, they may be located in one place or distributed across multiple modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the present embodiment.

[0105] In addition, the functional modules in various embodiments of the present invention may be integrated into a single processing module, or each module may exist physically separately, or two or more modules may be integrated into a single module. The aforementioned integrated modules may be implemented in the form of hardware or software functional modules.

[0106] If the above-mentioned integrated module is implemented in the form of a software functional module and sold or used as an independent product, it can be stored in a computer-readable non-volatile storage medium. Based on this understanding, the technical solution of the present invention, 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. The computer software product is stored in a non-volatile storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server or network device, etc.) to execute all or part of the steps of the various embodiments of the present invention. The aforementioned non-volatile storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk, and other media that can store program codes.

[0107] The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for determining a transformer maintenance strategy, characterized in that: include: Acquire ultrasonic signals collected in real time during transformer operation; determining the amplitude and frequency of the ultrasonic signal; When it is determined that the amplitude and / or frequency of the ultrasonic signal meets a predetermined condition, obtaining an audible sound signal collected in real time during the operation of the transformer; determining the amplitude and frequency of the audible signal; determining a maintenance strategy for the transformer based on the amplitude and frequency of the audible signal; Wherein, when it is determined that the amplitude and / or frequency of the ultrasonic signal meets a predetermined condition, obtaining the audible sound signal collected in real time during the operation of the transformer includes: when it is determined that the amplitude of the ultrasonic signal is greater than a preset first amplitude, controlling to start an audible sound signal collection device; receiving the audible sound signal collected in real time during the operation of the transformer by the audible sound signal collection device; The acquiring, upon determining that the amplitude and / or frequency of the ultrasonic signal satisfies a predetermined condition, the audible sound signal acquired in real time during the operation of the transformer includes: determining whether, when the amplitude of the ultrasonic signal is less than or equal to the preset first amplitude, whether a signal having a frequency greater than or equal to a preset first frequency threshold exists in the ultrasonic signal; determining, when determining that no signal having a frequency greater than or equal to the preset first frequency threshold exists in the ultrasonic signal, a first amplitude ratio corresponding to signals having a frequency less than a preset second frequency threshold in the ultrasonic signal; and acquiring, when the first amplitude ratio is greater than or equal to a preset first ratio, the audible sound signal acquired in real time during the operation of the transformer.

2. The method according to claim 1, characterized in that The determining of a maintenance strategy for the transformer based on the amplitude and frequency of the audible signal includes: Obtaining a second amplitude ratio corresponding to a signal having a frequency less than a preset third frequency threshold in the audible sound signal; When the proportion of the second amplitude is greater than or equal to a preset second proportion, the maintenance strategy is determined to be: controlling the transformer to continue operating and controlling the collection of oil samples from the transformer.

3. The method according to claim 2, characterized in that The method further comprises: When the proportion of the second amplitude is smaller than the preset second proportion, the maintenance strategy is determined to be: controlling the transformer to continue operating and performing real-time monitoring on the transformer.

4. The method according to any one of claims 1 to 3, characterized in that The method further comprises: When it is determined that there is a signal in the ultrasonic signal whose frequency is greater than or equal to the preset first frequency threshold, or the first amplitude ratio is less than the preset first ratio, the maintenance strategy is determined to be: controlling the transformer to continue operating and performing real-time monitoring of the transformer.

5. A system for determining transformer maintenance strategy, characterized in that: include: Ultrasonic signal acquisition equipment, audible sound signal acquisition equipment, main control equipment, among which, The ultrasonic signal acquisition device is used to collect ultrasonic signals in real time during the operation of the transformer; The main control device is connected to the ultrasonic signal acquisition device and is used to determine the amplitude and frequency of the ultrasonic signal, and when it is determined that the amplitude and / or frequency of the ultrasonic signal meets a predetermined condition, send a start control signal to the audible sound signal acquisition device; The audible sound signal acquisition device is connected to the main control device and is used to collect real-time audible sound signals during the operation of the transformer when the startup control signal is received; The main control device is further configured to determine the amplitude and frequency of the audible sound signal; and determine a maintenance strategy for the transformer based on the amplitude and frequency of the audible sound signal; The main control device is further configured to: when it is determined that the amplitude of the ultrasonic signal is greater than a preset first amplitude, control the activation of an audible sound signal acquisition device; and receive the audible sound signal collected in real time by the audible sound signal acquisition device during the operation of the transformer; The main control device is further configured to: when the amplitude of the ultrasonic signal is less than or equal to the preset first amplitude, determine whether there is a signal with a frequency greater than or equal to a preset first frequency threshold in the ultrasonic signal; when it is determined that there is no signal with a frequency greater than or equal to the preset first frequency threshold in the ultrasonic signal, determine a first amplitude ratio corresponding to signals with a frequency less than a preset second frequency threshold in the ultrasonic signal; and when the first amplitude ratio is greater than or equal to a preset first ratio, obtain the audible sound signal collected in real time during the operation of the transformer.

6. A device for determining a transformer maintenance strategy, characterized in that: include: The first acquisition module is used to acquire ultrasonic signals collected in real time during the operation of the transformer; a first determining module, configured to determine the amplitude and frequency of the ultrasonic signal; a second acquisition module, configured to acquire an audible sound signal collected in real time during operation of the transformer, upon determining that the amplitude and / or frequency of the ultrasonic signal meets a predetermined condition; a second determining module, configured to determine the amplitude and frequency of the audible sound signal; a third determining module, configured to determine a maintenance strategy for the transformer based on the amplitude and frequency of the audible signal; The second acquisition module is further configured to: when it is determined that the amplitude of the ultrasonic signal is greater than a preset first amplitude, control the activation of an audible sound signal acquisition device; and receive the audible sound signal collected in real time by the audible sound signal acquisition device during the operation of the transformer; The second acquisition module is further configured to: when the amplitude of the ultrasonic signal is less than or equal to the preset first amplitude, determine whether there is a signal with a frequency greater than or equal to a preset first frequency threshold in the ultrasonic signal; and when it is determined that there is no signal with a frequency greater than or equal to the preset first frequency threshold in the ultrasonic signal, determine a first amplitude ratio corresponding to signals with a frequency less than a preset second frequency threshold in the ultrasonic signal; When the proportion of the first amplitude is greater than or equal to a preset first proportion, the audible sound signal collected in real time during the operation of the transformer is obtained.

7. A non-volatile storage medium, characterized in that: The non-volatile storage medium stores a plurality of instructions, and the instructions are suitable for being loaded by a processor and executed by the method for determining a transformer maintenance strategy according to any one of claims 1 to 4.

8. An electronic device, characterized in that: The method comprises one or more processors and a memory, wherein the memory is used to store one or more programs, wherein when the one or more programs are executed by the one or more processors, the one or more processors implement the method for determining the transformer maintenance strategy according to any one of claims 1 to 4.

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