An electronic polarity testing method and device based on impulse response waveform

Abstract

The present invention provides an electronic polarity test method and device based on impulse response waveform, comprising: inputting a spike pulse on the primary side, obtaining a primary side characteristic function, and obtaining a secondary side impulse response waveform under the spike pulse; obtaining a secondary side impulse response waveform, obtaining a secondary side characteristic function; and determining the polarity of the transformer under test based on the primary side characteristic function and the secondary side characteristic function. The present invention can provide a mathematical method for the traditional manual determination of the polarity of the transformer, thereby improving the degree of automation of polarity identification.

Description

Technical Field

[0001] The invention relates to the technical field of power transformation detection, and in particular to an electronic polarity testing method and device based on impulse response waveform. Background Art

[0002] The polarity test of the transformer in the AC circuit of the substation currently still relies on the method of manually identifying the deflection of the pointer meter. This method is relatively primitive and hinders the development of fully automatic intelligent commissioning and acceptance. This patent proposes a test method for identifying the polarity of the transformer based on the impulse response waveform of the weak current. This method fully considers the characteristics of the transformer's large transformer causing the secondary waveform to be weak, and derives and selects the optimal primary input waveform. On this basis, this method identifies the polarity of the transformer based on the secondary waveform. The polarity test of this patent method can provide a mathematical method for the traditional manual judgment of the transformer polarity. The voltage level is low and the polarity identification is automatically performed, laying the foundation for the intelligent commissioning and acceptance of the AC circuit transformer. Summary of the invention

[0003] In view of this, the purpose of the present invention is to provide an electronic polarity testing method and device based on impulse response waveform, which can provide a mathematical method for traditional manual judgment of transformer polarity and improve the degree of automation of polarity identification.

[0004] The present invention provides an electronic polarity testing method based on an impulse response waveform, comprising:

[0005] Input a spike pulse on the primary side, obtain the primary side characteristic function, and obtain the secondary side impulse response waveform under the spike pulse;

[0006] Obtain secondary side impulse response waveform and secondary side characteristic function;

[0007] The polarity of the transformer under test is determined based on the primary side characteristic function and the secondary side characteristic function.

[0008] Preferably, the step of determining the polarity of the transformer under test based on the primary side characteristic function and the secondary side characteristic function comprises:

[0009] When the product of the primary side characteristic function and the secondary side characteristic function is 1, the transformer under test is of positive polarity;

[0010] When the product of the primary side characteristic function and the secondary side characteristic function is -1, the transformer under test is of reverse polarity.

[0011] Preferably, the primary side characteristic function is:

[0012]

[0013] f(t)—primary side input spike pulse function;

[0014] The secondary side characteristic function is:

[0015]

[0016] F(t)—Secondary side output impulse response waveform function.

[0017] In another aspect, the present invention provides an electronic polarity test device based on an impulse response waveform, comprising:

[0018] Waveform acquisition module: used to input a spike pulse on the primary side, obtain the primary side characteristic function, and obtain the secondary side impulse response waveform under the spike pulse;

[0019] Secondary side characteristic function acquisition module: used to obtain the secondary side impulse response waveform and the secondary side characteristic function;

[0020] Polarity determination module: used to determine the polarity of the transformer under test based on the primary side characteristic function and the secondary side characteristic function.

[0021] Based on the primary side characteristic function, the embodiment of the present invention brings the following beneficial effects: the present invention provides an electronic polarity test method and device based on impulse response waveform, including: inputting a spike pulse on the primary side, obtaining the primary side characteristic function, and obtaining the secondary side impulse response waveform under the spike pulse; obtaining the secondary side impulse response waveform, obtaining the secondary side characteristic function; determining the polarity of the transformer under test based on the primary side characteristic function and the secondary side characteristic function. The present invention can provide a mathematical method for the traditional manual judgment of the polarity of the transformer, thereby improving the degree of automation of polarity identification.

[0022] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description, claims and drawings.

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 A primary side peak pulse waveform of an electronic polarity test method based on an impulse response waveform provided by an embodiment of the present invention;

[0026] Figure 2 An electronic polarity testing method based on an impulse response waveform provided by an embodiment of the present invention sets a secondary side impulse response waveform;

[0027] Figure 3 Another electronic polarity testing method based on impulse response waveform provided by an embodiment of the present invention includes a secondary side impulse response waveform. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] At present, the polarity test of the secondary AC circuit of the substation still relies on the method of manually identifying the deflection of the pointer meter. This method is relatively primitive and hinders the development of intelligent debugging and acceptance. Based on this, an electronic polarity testing method and device based on an impulse response waveform provided in an embodiment of the present invention can provide a mathematical method for the traditional manual judgment of the polarity of the transformer, thereby improving the degree of automation of polarity identification.

[0030] To facilitate understanding of this embodiment, firstly, an electronic polarity testing method based on an impulse response waveform disclosed in an embodiment of the present invention is introduced in detail.

[0031] Embodiment 1:

[0032] Embodiment 1 of the present invention provides an electronic polarity testing method based on an impulse response waveform, comprising:

[0033] Input a spike pulse on the primary side, obtain the primary side characteristic function, and obtain the secondary side impulse response waveform under the spike pulse;

[0034] Obtain secondary side impulse response waveform and secondary side characteristic function;

[0035] The polarity of the transformer under test is determined based on the primary side characteristic function and the secondary side characteristic function.

[0036] Preferably, the step of determining the polarity of the transformer under test based on the primary side characteristic function and the secondary side characteristic function comprises:

[0037] When the product of the primary side characteristic function and the secondary side characteristic function is 1, the transformer under test is of positive polarity;

[0038] When the product of the primary side characteristic function and the secondary side characteristic function is -1, the transformer under test is of reverse polarity.

[0039] Preferably, the primary side characteristic function is:

[0040]

[0041] f(t)—primary side input spike pulse function;

[0042] The secondary side characteristic function is:

[0043]

[0044] F(t)—Secondary side output impulse response function.

[0045] Embodiment 2:

[0046] Embodiment 2 of the present invention provides an electronic polarity testing device based on an impulse response waveform, comprising:

[0047] Waveform acquisition module: used to input a spike pulse on the primary side, obtain the primary side characteristic function, and obtain the secondary side impulse response waveform under the spike pulse;

[0048] Secondary side characteristic function acquisition module: used to obtain the secondary side impulse response waveform and the secondary side characteristic function;

[0049] Polarity determination module: used to determine the polarity of the transformer under test based on the primary side characteristic function and the secondary side characteristic function.

[0050] Unless otherwise specifically stated, the relative steps, numerical expressions and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present invention.

[0051] The flow charts and block diagrams in the accompanying drawings show the possible architecture, functions and operations of the system, method and computer program product according to multiple embodiments of the present invention. In this regard, each box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, a program segment or a part of a code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flow chart, and the combination of the boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or action, or can be implemented with a combination of dedicated hardware and computer instructions.

[0052] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the system and device described above can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0053] In addition, in the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0055] Finally, it should be noted that the above-described embodiments are only specific implementations of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The protection scope of the present invention is not limited thereto. Although the present invention is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed by the present invention, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. An electronic polarity test method based on impulse response waveform, characterized in that: include: Input a spike pulse on the primary side, obtain the primary side characteristic function, and obtain the secondary side impulse response waveform under the spike pulse; Obtain secondary side impulse response waveform and secondary side characteristic function; Determining the polarity of the transformer under test based on the primary side characteristic function and the secondary side characteristic function; The primary side characteristic function is: f(t)—primary side input spike pulse function; The secondary side characteristic function is: F(t)—Secondary side output impulse response waveform function.

2. The method according to claim 1, characterized in that: The step of determining the polarity of the transformer under test based on the primary side characteristic function and the secondary side characteristic function comprises: When the product of the primary side characteristic function and the secondary side characteristic function is 1, the transformer under test is of positive polarity; When the product of the primary side characteristic function and the secondary side characteristic function is -1, the transformer under test is of reverse polarity.

3. An electronic polarity test device based on impulse response waveform, characterized in that: include: Waveform acquisition module: used to input a spike pulse on the primary side, obtain the primary side characteristic function, and obtain the secondary side impulse response waveform under the spike pulse; Secondary side characteristic function acquisition module: used to obtain the secondary side impulse response waveform and the secondary side characteristic function; Polarity determination module: used for determining the polarity of the measured transformer based on the primary side characteristic function and the secondary side characteristic function; The primary side characteristic function is: f(t)—primary side input spike pulse function; The secondary side characteristic function is: F(t)—Secondary side output impulse response waveform function.

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