阅读说明：本技术 一种高压电抗器振动信号分析方法、非暂态可读记录媒体及系统 (High-voltage reactor vibration signal analysis method, non-transient readable recording medium and system ) 是由 黄勤清 程林 罗传仙 聂德鑫 黄立才 刘衍宏 周文 徐惠 张宗喜 李学成 于 2021-06-24 设计创作，主要内容包括：本发明涉及输变电设施振动信号分析技术领域,公开了一种高压电抗器振动信号分析方法,包括通过两种不同原理测量方式获得高压电抗器工作时的振动信号图谱；使用交叉递归图和递归量化法对测试的信号进行分析；对比两种测试方法的分析结果,降低了不同因素对分析结构的影响,提高了信号分析的精度,适用于对高压电抗器运行状态的监控。本发明还提供了一种包括存储有上述方法程序的非暂态可读记录媒体及处理电路构成的系统,通过处理电路可以调用该程序,以执行上述方法,完成对通过不同方法对高压电抗器振动信号测量结果的量化分析。(The invention relates to the technical field of vibration signal analysis of power transmission and transformation facilities, and discloses a vibration signal analysis method of a high-voltage electric reactor, which comprises the steps of obtaining a vibration signal map of the high-voltage electric reactor during working through two different principle measurement modes; analyzing the tested signal by using a cross recursion graph and a recursion quantization method; compared with the analysis results of the two test methods, the influence of different factors on the analysis structure is reduced, the accuracy of signal analysis is improved, and the method is suitable for monitoring the running state of the high-voltage reactor. The invention also provides a system comprising a non-transitory readable recording medium storing the program of the method and a processing circuit, wherein the processing circuit can call the program to execute the method so as to complete the quantitative analysis of the vibration signal measurement result of the high-voltage reactor by different methods.)

1. A vibration signal analysis method for a high-voltage reactor is characterized by comprising the following steps:

s1, acquiring a vibration signal of a high-voltage reactor during working through two testing methods;

s2, drawing the vibration signal characteristic quantity acquired by the two test modes into a two-dimensional graph;

s3, analyzing the characteristic quantity of the vibration signal by using a cross recursion graph and a recursion quantization method;

s4, representing the difference of the analysis results of the two test methods by using data, and setting an acceptable difference threshold;

and S5, extracting the measuring points of which the difference of the analysis results of the two testing methods is within the set threshold value.

2. The method for analyzing the vibration signal of the high-voltage reactor according to claim 1, wherein: the two test methods are a contact measurement method and a non-contact measurement method respectively.

3. The method for analyzing the vibration signal of the high-voltage reactor according to claim 2, wherein: the contact type measuring method is characterized in that a mechanical vibration signal is collected through a sensor, and the frequency domain characteristic and the time domain characteristic of the signal are extracted.

4. The method for analyzing the vibration signal of the high-voltage reactor according to claim 2, wherein: the contact type measuring method is characterized in that the vibration of the high-voltage reactor is directly measured through the laser Doppler effect, a displacement signal of a measuring point is collected, and the frequency domain characteristic and the time domain characteristic of the signal are extracted.

5. The method for analyzing the vibration signal of the high-voltage reactor according to claim 1, wherein: the two-dimensional graph is a column graph or a line graph and can represent frequency domain and time domain characteristic quantities of each measuring point obtained by the two testing methods.

6. A non-transitory readable recording medium storing one or more programs containing instructions, wherein the programs include the steps included in a method for analyzing a vibration signal of a high-voltage reactor according to any one of claims 1 to 5.

7. A high-voltage reactor vibration signal analysis system comprising a non-transitory readable recording medium storing a program and a processing circuit, wherein the program is called by the processing circuit to execute steps S1-S5 in the high-voltage reactor vibration signal analysis method according to any one of claims 1 to 5.

Technical Field

The invention relates to the technical field of vibration signal analysis of power transmission and transformation facilities, in particular to a vibration signal analysis method of a high-voltage reactor.

Background

Reactors, also called inductors, are electrical conductors that, when energized, generate a magnetic field in a certain spatial area occupied by a conductor, so that all electrical conductors capable of carrying current are inductive in the general sense. However, the inductance of the electrified long straight conductor is small, and the generated magnetic field is not strong, so that the actual reactor is in a mode that a conducting wire is wound into a solenoid, and is called as an air-core reactor; in order to make this solenoid have a larger inductance, a core, called a core reactor, is sometimes inserted into the solenoid. Reactance is divided into inductive reactance and capacitive reactance, and the more scientific classification is that inductive reactance (inductor) and capacitive reactance (capacitor) are collectively called as reactor, however, since the inductor is used before and is called as reactor, the capacitor is called as reactor now, and the reactor is specially called as inductor, and the reactor can be used for absorbing surplus reactive power in the system, so that reactive power back-sending in the system is reduced, and the economical efficiency of system operation is improved.

The high-voltage shunt reactor plays important roles of voltage stabilization, reactive compensation and the like in a power system, and is key equipment for smart grid construction, global energy interaction and networking strategies. The dynamic characteristics of the mechanical structure of the reactor body are influenced by the change of the parameters of the mechanical structure of the high-voltage reactor. Because the high-voltage shunt reactor is large in size and complex in structure, the attenuation degree of the internal vibration signal on the surface of the oil tank is greatly different. In field test, a position which can best reflect the vibration characteristic inside the reactor needs to be determined on the surface of the oil tank for measuring point arrangement. Therefore, the correlation between the vibration signal on the surface of the oil tank of the reactor and the internal vibration signal needs to be researched, so that the vibration sensitive area of the reactor is determined, and a theoretical basis is provided for the subsequent health monitoring and fault diagnosis of the reactor. In addition, the existing high-voltage reactor vibration signal analysis method has the advantages of single signal acquired by the reactor vibration signal, less analysis data and lower analysis result precision. If signals are acquired by a plurality of methods, more data can be acquired, but the correlation of the data measured by different methods must be studied to screen out the really valuable data, so that the difference of the data acquired by different methods at each measuring point is represented by a numerical value, which is a problem to be solved urgently by the technical staff at present. Therefore, the method has important practical significance and value for analyzing and researching the vibration signals of the shunt reactor. However, the existing high-voltage reactor vibration signal analysis method is single in signal acquired by the reactor vibration signal, less in analysis data and lower in analysis result precision.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides the method for analyzing the vibration signal of the high-voltage reactor, which has the advantages of accurate analysis, high precision and the like, and solves the problems of single analysis data and inaccurate analysis.

The technical scheme provided by the invention comprises the following steps:

s1, acquiring a vibration signal of a high-voltage reactor during working through two testing methods;

s2, drawing the vibration signal characteristic quantity acquired by the two test modes into a two-dimensional graph;

s3, analyzing the characteristic quantity of the vibration signal by using a cross recursion graph and a recursion quantization method;

and S4, representing the difference of the analysis results of the two testing methods by using data, and setting an acceptable difference threshold value.

And S5, extracting the measuring points of which the difference of the analysis results of the two testing methods is within a set threshold value.

Preferably, the two test methods are a contact measurement method and a non-contact measurement method, respectively.

Further, the contact measurement method is to collect mechanical vibration signals through a sensor and extract frequency domain characteristics and time domain characteristics of the signals; the non-contact measurement method is to directly measure the vibration of the high-voltage reactor through the laser Doppler effect, collect the displacement signals of the measuring points and extract the frequency domain characteristics and the time domain characteristics of the signals.

The results measured by the two acquisition modes are closely related to the vibration information of the high-pressure point reactor, and the two methods have no correlation, so that the measured characteristic quantity can be independently characterized.

Preferably, the two-dimensional graph is a column graph or a line graph, and can represent frequency domain and time domain characteristic quantities of each measuring point obtained by the two testing methods.

The column diagram and the line diagram can better contain and fit two-dimensional measuring points on coordinates, and data characteristics are really represented.

Another aspect of the present invention is to provide a non-transitory readable recording medium storing one or more programs including instructions, the programs including the steps included in the aforementioned method for analyzing a vibration signal of a high-voltage reactor.

Still another aspect of the present invention is to provide a system for analyzing a vibration signal of a high-voltage reactor, comprising a non-transitory readable recording medium storing a program and a processing circuit, wherein the processing circuit can call the program to execute the steps S1-S54 in the method.

Compared with the prior art, the invention provides a vibration signal analysis method of a high-voltage reactor, which has the following beneficial effects:

according to the high-voltage reactor vibration signal analysis method, the high-voltage reactor vibration signals are acquired through two different test methods, the two test signals are analyzed in a unified mode, the signal results are compared, the similarity of the results is compared, the influence of different factors on an analysis structure is reduced, the mutual influence between the two different measurement methods is avoided, and the signal analysis precision is improved.

Drawings

FIG. 1 is a schematic structural diagram of a contact type test method schematic diagram of a vibration signal analysis method of a high-voltage reactor according to the present invention;

fig. 2 is a schematic structural diagram of a non-contact test method of the vibration signal analysis method of the high-voltage reactor provided by the 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. 1-2, the implementation steps of the present embodiment are as follows:

measuring the high-voltage reactor by adopting an ICP vibration signal acceleration sensor, acquiring a mechanical vibration signal of the high-voltage reactor by the sensor, specifically, directly arranging the ICP vibration signal acceleration sensor at a vibration characteristic point of the high-voltage reactor, generating mechanical vibration at the characteristic point when the high-voltage reactor works, acquiring mechanical vibration information of the characteristic point by the ICP vibration signal acceleration sensor, analyzing a time domain signal of a measuring point by a computer system, and extracting a frequency domain characteristic and a time domain characteristic of the signal;

simply drawing the obtained acceleration information of each measuring point into a two-dimensional bar graph, sequentially connecting the midpoints of the bar graphs according to the sequence, carrying out frequency spectrum analysis on the characteristic point with the maximum acceleration amplitude, and statistically drawing the main frequency of the characteristic point into the two-dimensional bar graph; and then the speed characteristic diagram is converted according to the time domain characteristics through a cross recursion diagram.

The vibration signal generated by the characteristic point of the high-voltage reactor is directly measured through the laser Doppler effect, the displacement of the measuring point is collected in real time, the displacement collected in real time is recorded at high speed through a computer system, the recorded data is analyzed, the frequency domain characteristic and the time domain characteristic of the signal are extracted, and the vibration measuring point of the high-voltage reactor can be flexibly arranged according to the condition of the detection requirement on the premise of ensuring the test precision and the requirement.

Simply drawing the displacement information of each measuring point into a two-dimensional bar graph, sequentially connecting the midpoints of the bar graphs according to the sequence, carrying out spectrum analysis on the characteristic point with the maximum displacement amplitude, and statistically drawing the main frequency of the characteristic point into the two-dimensional bar graph. And then the speed characteristic diagram is converted according to the time domain characteristics through a cross recursion diagram.

Analyzing the tested signal by using a cross recursion graph and a recursion quantitative analysis, respectively measuring eight measuring points, and respectively obtaining a recursion rate of 0.3925, 0.3870, 0.3909, 0.2689, 0.4373, 0.4110, 0.3350 and 0.3157, a determination degree of 0.8984, 0.8672, 0.8972, 0.7736, 0.9918, 0.9896, 0.7895 and 0.7227, and a diagonal average line length of 34.4645, 27.6439, 31.46, 9.7604, 45.5866, 42.0984, 15.8746 and 18.3935 to perform the recursion quantitative analysis according to the recursion rate calculated by the measurement;

the detection data of the measuring points are systematically recurred through a cross recursion graph, the cross recursion graph displays the recursion characteristics of the system by adopting a two-dimensional image, the qualitative analysis of the cross recursion graph is visual and simple, the cross recursion graph is binary extension of the recursion graph, the cross recursion graph analyzes the respective recursion characteristics of two systems in the same phase space, and the recursion coincidence time period of the two systems is searched, wherein the cross recursion matrix corresponding to the cross recursion graph is as follows:

C_ij＝θ(r-||x_i-y_j||)i＝1,2,…N；j＝1,2,…M

x and Y represent the phase trajectories of the two systems m-dimensional reconstruction space.

The cross recursive graph is composed of diagonal segments and isolated points, the more similar the dynamic characteristics among the systems, the longer the diagonal segments formed in the cross recursive graph, when the difference of the dynamic characteristics of the systems is larger, the continuous diagonal segments cannot be generated in the cross recursive graph, and the cross recursive graph can be adopted to carry out comparative analysis on the attenuation degrees of the vibration signals of different measuring points of the reactor.

The measuring point characteristics are expressed through the two-dimensional image of the cross recursion graph, the measuring point characteristics in the cross recursion graph are quantized through recursion quantitative analysis, the difference between the two testing methods can be expressed through data, the difference between the two testing methods can be more intuitively known, and the testing result can be conveniently analyzed.

The recursion quantitative analysis is defined by four parameters of recursion rate, determination rate, average diagonal length and recursion entropy, the recursion rate refers to the density of recursion points in the recursion quantitative analysis and is used for reflecting the discrete degree of the recursion points, the determination rate is used for forming the proportion of the recursion points of a forty-five-degree diagonal structure, the determination rate can measure the regularity of the system, the average diagonal length refers to the average length of the diagonals and represents the average time consumed by the phase tracks approaching each other, the entropy refers to the information entropy distributed by the forty-five-degree diagonal structure and represents the complexity of the system, and the main component method component correlation coefficients are used as the comprehensive measurement indexes of the correlation among the measurement points through the collected multiple groups of recursion quantitative analysis parameters.

The correlation coefficients corresponding to the eight outside measurement points can be estimated by calculation of the measurement, wherein the 1-5 point correlation coefficient is 0.716, the 2-5 point correlation coefficient is 0.653, the 3-5 point correlation coefficient is 0.728, the 4-5 point correlation coefficient is 0.429, the 5-5 point correlation coefficient is 0.827, the 6-5 point correlation coefficient is 0.844, that is, the 7-5 point correlation coefficient is 0.285, and the 8-5 point correlation coefficient is 0.247.

The acceptable correlation coefficient range is set to be more than 0.7 (threshold value) according to the empirical value, so that four points of 1-5, 3-5, 5-5 and 6-5 can be extracted to be used as test points for data analysis by adopting a contact method in the future.

In summary, according to the method for analyzing the vibration signal of the high-voltage reactor, the vibration signal of the high-voltage reactor is acquired through two different testing methods, the two testing signals are analyzed in a unified manner, the signal results are compared, the similarity of the results is compared, the influence of different factors on an analysis structure is reduced, the accuracy of signal analysis is improved, and the precision of signal analysis is improved.

The method is implemented by implanting the method into hardware equipment of a general computer in a software programming mode, so as to form another embodiment of the invention, namely: a vibration signal analysis system of a high-voltage reactor.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the use of the verb "comprise a" to define an element does not exclude the presence of another, same element in a process, method, article, or apparatus that comprises the element.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computers, usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.