CN105937876A - Transformer winding deformation detection system and method - Google Patents
Transformer winding deformation detection system and method Download PDFInfo
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- CN105937876A CN105937876A CN201610553500.7A CN201610553500A CN105937876A CN 105937876 A CN105937876 A CN 105937876A CN 201610553500 A CN201610553500 A CN 201610553500A CN 105937876 A CN105937876 A CN 105937876A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
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Abstract
The invention discloses a transformer winding deformation detection system. The detection system comprises a signal input module, a signal collecting module, a data processing module, a signal correcting module and a detection module, wherein the signal input module is used for inputting detection signals to the primary side of a transformer, the signal collecting module is used for collecting response signals of the transformer, the data processing module is used for computing the response signals to obtain a corresponding short-circuit impedance percent, the signal correcting module is used for storing the response signals of the transformer and correcting the detection signals according to the response signals, and the detection module is used for detecting transformer winding deformation with the short-circuit impedance percent. The invention further discloses a detection method for the transformer winding deformation detection system. Defects in the prior art can be overcome by the system, and detection accuracy when transformer load frequently fluctuates in a wide range is improved.
Description
Technical field
The present invention relates to transformer technology field, the detecting system of a kind of deformation of transformer winding and detection method thereof.
Background technology
Transformator is one of topmost equipment in power system, expensive and important, will affect the normal work of power system when transformator breaks down, and then bring loss to national economy.But Transformer Winding is one of the more parts that break down, therefore, find the potential threat of Transformer Winding as early as possible, find that deformation of transformer winding is critically important in time.When transformator generation outlet short circuit, suffered electrodynamic tens even hundred times when electric power suffered by its winding would is that properly functioning.Simultaneously because design of transformer structure can not reach national regulations bear short-circuit capacity so that after bearing short-circuit current rush, there is mechanically deform in Transformer Winding.Electric power is unlikely to make winding directly deform in some cases, but winding deformation also can be made to develop further by accumulative effect, even if there is not system short-circuit accident, also results in transformator improper out of service.
Chinese invention patent 201310329476.5 discloses a kind of deformation of transformer winding online test method and system, achieves the detection of winding deformation on the premise of not affecting power supply continuity.But, this detection mode uses when transformer load frequently fluctuates widely, and error is bigger, it is impossible to draw accurate result.
Summary of the invention
The technical problem to be solved in the present invention is to provide detecting system and the detection method thereof of a kind of deformation of transformer winding, it is possible to solves the deficiencies in the prior art, improves the accuracy in detection when transformer load frequently fluctuates widely.
For solving above-mentioned technical problem, the technical solution used in the present invention is as follows.
A kind of detecting system of deformation of transformer winding, it is characterised in that: include,
Signal input module, for transformator primary side input detection signal；
Signal acquisition module, for being acquired the response signal of transformator；
Data processing module, for response signal is carried out calculation process, draws corresponding short-circuit impedance percentage ratio；
Signal correction module, for storing the response signal of transformator, and is modified detection signal according to known response signal；
Detection module, uses the short-circuit impedance percentage ratio of transformator to detect deformation of transformer winding.
The detection method of the detecting system of a kind of above-mentioned deformation of transformer winding, comprises the following steps:
A, by Circuit Fault on Secondary Transformer short circuit, signal input module adds input voltage to transformator primary side, the electric current of measuring transformer secondary side, when the electric current of Circuit Fault on Secondary Transformer reaches rated current, the voltage on transformator primary side is acquired by signal acquisition module；
B, data processing module use the voltage on the transformator primary side measured in step A compared with the rated voltage of transformator primary side, draw the first short-circuit impedance percentage ratio；
C, by Circuit Fault on Secondary Transformer short circuit, signal input module adds input voltage to transformator primary side, the electric current of measuring transformer primary side, when the electric current of transformator primary side reaches rated current, the voltage on transformator primary side is acquired by signal acquisition module；
The input voltage of signal input module is modified by D, signal correction module according to the first short-circuit impedance percentage ratio obtained in step B；
E, data processing module use the voltage on the transformator primary side measured after step D is revised compared with the rated voltage of transformator primary side, draw the second short-circuit impedance percentage ratio；
F, by Circuit Fault on Secondary Transformer short circuit, signal input module adds input voltage to transformator primary side, the electric current of measuring transformer primary side, when the electric current of transformator primary side reaches rated current, the voltage on transformator primary side and the electric current in Circuit Fault on Secondary Transformer are acquired by signal acquisition module；
The input voltage of signal input module is modified by G, signal correction module according to the second short-circuit impedance percentage ratio obtained in step E；
The input voltage of the transformator primary side that H, data processing module measure after using the correction of step G, compared with the electric current in Circuit Fault on Secondary Transformer, draws the 3rd short-circuit impedance percentage ratio；
I, detection module use the short-circuit impedance percentage ratio of transformator to detect deformation of transformer winding.
As preferably, in step A, the frequency that signal input module adds input voltage to transformator primary side is linearly increasing by 20Hz to 100Hz.
As preferably, in step B, data processing module obtains increasing, with input voltage frequency, the first short-circuit impedance percentage curve that trend is Tong Bu.
As preferably, in step C, the frequency that signal input module adds input voltage to transformator primary side is linearly increasing by 20Hz to 100Hz；The most in step D, according to the impedance magnitude of the first short-circuit impedance percentage curve, being weighted revising to the input voltage of corresponding frequencies, the impedance magnitude of weight coefficient and the first short-circuit impedance percentage curve is directly proportional.
As preferably, in step E, data processing module obtains increasing, with input voltage frequency, the second short-circuit impedance percentage curve that trend is Tong Bu.
As preferably, in step F, the frequency that signal input module adds input voltage to transformator primary side is linearly increasing by 20Hz to 100Hz；Then in step G, according to the impedance magnitude of the second short-circuit impedance percentage curve, it is weighted revising to the input voltage of corresponding frequencies, square being directly proportional of weight coefficient and the first short-circuit impedance percentage curve impedance magnitude.
As preferably, in step H, data processing module obtains increasing, with input voltage frequency, the 3rd short-circuit impedance percentage curve that trend is Tong Bu.
As preferably, in step I, use the decision value of the 3rd short-circuit impedance percentage curve to contrast with short-circuit impedance standard value, obtain the result of deformation of transformer winding.
What employing technique scheme was brought has the beneficial effects that: present invention improves over the method that existing short circuit impedance method measures deformation, by three cycle calculations, during can effectively lowering single calculation, transformer load change is for calculating the error impact of process.
Accompanying drawing explanation
Fig. 1 is the structure chart of one detailed description of the invention of the present invention.
In figure: 1, signal input module；2, signal acquisition module；3, data processing module；4, signal correction module；5, detection module.
Detailed description of the invention
The standardized element used in the present invention all can be commercially, shaped piece all can carry out customized according to the record with accompanying drawing of description, the concrete connected mode of each part all use in prior art ripe bolt, rivet, weld, the conventional means such as stickup, be not described in detail in this.
With reference to Fig. 1, one detailed description of the invention of the present invention includes,
Signal input module 1, for transformator primary side input detection signal；
Signal acquisition module 2, for being acquired the response signal of transformator；
Data processing module 3, for response signal is carried out calculation process, draws corresponding short-circuit impedance percentage ratio；
Signal correction module 4, for storing the response signal of transformator, and is modified detection signal according to known response signal；
Detection module 5, uses the short-circuit impedance percentage ratio of transformator to detect deformation of transformer winding.
The detection method of the detecting system of a kind of above-mentioned deformation of transformer winding, comprises the following steps:
A, by Circuit Fault on Secondary Transformer short circuit, signal input module 1 adds input voltage to transformator primary side, the electric current of measuring transformer secondary side, when the electric current of Circuit Fault on Secondary Transformer reaches rated current, the voltage on transformator primary side is acquired by signal acquisition module 2；
B, data processing module 3 use the voltage on the transformator primary side measured in step A compared with the rated voltage of transformator primary side, draw the first short-circuit impedance percentage ratio；
C, by Circuit Fault on Secondary Transformer short circuit, signal input module 1 adds input voltage to transformator primary side, the electric current of measuring transformer primary side, when the electric current of transformator primary side reaches rated current, the voltage on transformator primary side is acquired by signal acquisition module 2；
The input voltage of signal input module 1 is modified by D, signal correction module 4 according to the first short-circuit impedance percentage ratio obtained in step B；
E, data processing module 3 use the voltage on the transformator primary side measured after step D is revised compared with the rated voltage of transformator primary side, draw the second short-circuit impedance percentage ratio；
F, by Circuit Fault on Secondary Transformer short circuit, signal input module 1 adds input voltage to transformator primary side, the electric current of measuring transformer primary side, when the electric current of transformator primary side reaches rated current, the voltage on transformator primary side and the electric current in Circuit Fault on Secondary Transformer are acquired by signal acquisition module 2；
The input voltage of signal input module 1 is modified by G, signal correction module 4 according to the second short-circuit impedance percentage ratio obtained in step E；
The input voltage of the transformator primary side that H, data processing module 3 measure after using the correction of step G, compared with the electric current in Circuit Fault on Secondary Transformer, draws the 3rd short-circuit impedance percentage ratio；
I, detection module 5 use the short-circuit impedance percentage ratio of transformator to detect deformation of transformer winding.
In step A, the frequency that signal input module 1 adds input voltage to transformator primary side is linearly increasing by 20Hz to 100Hz.
In step B, data processing module 3 obtains increasing, with input voltage frequency, the first short-circuit impedance percentage curve that trend is Tong Bu.
In step C, the frequency that signal input module 1 adds input voltage to transformator primary side is linearly increasing by 20Hz to 100Hz；The most in step D, according to the impedance magnitude of the first short-circuit impedance percentage curve, being weighted revising to the input voltage of corresponding frequencies, the impedance magnitude of weight coefficient and the first short-circuit impedance percentage curve is directly proportional.
In step E, data processing module 3 obtains increasing, with input voltage frequency, the second short-circuit impedance percentage curve that trend is Tong Bu.
In step F, the frequency that signal input module 1 adds input voltage to transformator primary side is linearly increasing by 20Hz to 100Hz；Then in step G, according to the impedance magnitude of the second short-circuit impedance percentage curve, it is weighted revising to the input voltage of corresponding frequencies, square being directly proportional of weight coefficient and the first short-circuit impedance percentage curve impedance magnitude.
In step H, data processing module 3 obtains increasing, with input voltage frequency, the 3rd short-circuit impedance percentage curve that trend is Tong Bu.
In step I, use the decision value of the 3rd short-circuit impedance percentage curve to contrast with short-circuit impedance standard value, obtain the result of deformation of transformer winding.
In describing the invention, it will be appreciated that, term " longitudinally ", " laterally ", " on ", D score, "front", "rear", "left", "right", " vertically ", " level ", " top ", " end ", " interior ", the orientation of the instruction such as " outward " or position relationship be based on orientation shown in the drawings or position relationship, it is for only for ease of the description present invention, rather than instruction or hint indication device or element must have specific orientation, with specific azimuth configuration and operation, be therefore not considered as limiting the invention.
The ultimate principle of the present invention and principal character and advantages of the present invention have more than been shown and described.Skilled person will appreciate that of the industry; the present invention is not restricted to the described embodiments; the principle that the present invention is simply described described in above-described embodiment and description; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements both fall within scope of the claimed invention.Claimed scope is defined by appending claims and equivalent thereof.
Claims (9)
1. the detecting system of a deformation of transformer winding, it is characterised in that: include,
Signal input module (1), for transformator primary side input detection signal；
Signal acquisition module (2), for being acquired the response signal of transformator；
Data processing module (3), for response signal is carried out calculation process, draws corresponding short-circuit impedance percentage ratio；
Signal correction module (4), for storing the response signal of transformator, and is modified detection signal according to known response signal；
Detection module (5), uses the short-circuit impedance percentage ratio of transformator to detect deformation of transformer winding.
2. the detection method of the detecting system of the deformation of transformer winding described in a claim 1, it is characterised in that comprise the following steps:
A, by Circuit Fault on Secondary Transformer short circuit, signal input module (1) adds input voltage to transformator primary side, the electric current of measuring transformer secondary side, when the electric current of Circuit Fault on Secondary Transformer reaches rated current, the voltage on transformator primary side is acquired by signal acquisition module (2)；
B, data processing module (3) use the voltage on the transformator primary side measured in step A compared with the rated voltage of transformator primary side, draw the first short-circuit impedance percentage ratio；
C, by Circuit Fault on Secondary Transformer short circuit, signal input module (1) adds input voltage to transformator primary side, the electric current of measuring transformer primary side, when the electric current of transformator primary side reaches rated current, the voltage on transformator primary side is acquired by signal acquisition module (2)；
The input voltage of signal input module (1) is modified by D, signal correction module (4) according to the first short-circuit impedance percentage ratio obtained in step B；
E, data processing module (3) use the voltage on the transformator primary side measured after step D is revised compared with the rated voltage of transformator primary side, draw the second short-circuit impedance percentage ratio；
F, by Circuit Fault on Secondary Transformer short circuit, signal input module (1) adds input voltage to transformator primary side, the electric current of measuring transformer primary side, when the electric current of transformator primary side reaches rated current, the voltage on transformator primary side and the electric current in Circuit Fault on Secondary Transformer are acquired by signal acquisition module (2)；
The input voltage of signal input module (1) is modified by G, signal correction module (4) according to the second short-circuit impedance percentage ratio obtained in step E；
The input voltage of the transformator primary side that H, data processing module (3) measure after using the correction of step G, compared with the electric current in Circuit Fault on Secondary Transformer, draws the 3rd short-circuit impedance percentage ratio；
I, detection module (5) use the short-circuit impedance percentage ratio of transformator to detect deformation of transformer winding.
The detection method of the detecting system of deformation of transformer winding the most according to claim 2, it is characterised in that: in step A, the frequency that signal input module (1) adds input voltage to transformator primary side is linearly increasing by 20Hz to 100Hz.
The detection method of the detecting system of deformation of transformer winding the most according to claim 3, it is characterised in that: in step B, data processing module (3) obtains increasing, with input voltage frequency, the first short-circuit impedance percentage curve that trend is Tong Bu.
The detection method of the detecting system of deformation of transformer winding the most according to claim 4, it is characterised in that: in step C, the frequency that signal input module (1) adds input voltage to transformator primary side is linearly increasing by 20Hz to 100Hz；The most in step D, according to the impedance magnitude of the first short-circuit impedance percentage curve, being weighted revising to the input voltage of corresponding frequencies, the impedance magnitude of weight coefficient and the first short-circuit impedance percentage curve is directly proportional.
The detection method of the detecting system of deformation of transformer winding the most according to claim 5, it is characterised in that: in step E, data processing module (3) obtains increasing, with input voltage frequency, the second short-circuit impedance percentage curve that trend is Tong Bu.
The detection method of the detecting system of deformation of transformer winding the most according to claim 6, it is characterised in that: in step F, the frequency that signal input module (1) adds input voltage to transformator primary side is linearly increasing by 20Hz to 100Hz；Then in step G, according to the impedance magnitude of the second short-circuit impedance percentage curve, it is weighted revising to the input voltage of corresponding frequencies, square being directly proportional of weight coefficient and the first short-circuit impedance percentage curve impedance magnitude.
The detection method of the detecting system of deformation of transformer winding the most according to claim 7, it is characterised in that: in step H, data processing module (3) obtains increasing, with input voltage frequency, the 3rd short-circuit impedance percentage curve that trend is Tong Bu.
The detection method of the detecting system of deformation of transformer winding the most according to claim 8, it is characterized in that: in step I, the decision value using the 3rd short-circuit impedance percentage curve contrasts with short-circuit impedance standard value, obtains the result of deformation of transformer winding.
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Cited By (3)
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| CN111722152A (en) * | 2020-06-29 | 2020-09-29 | 龚小娟 | Transformer winding deformation monitoring method and monitoring system |
| CN111856321A (en) * | 2020-07-09 | 2020-10-30 | 国网山东省电力公司淄博供电公司 | Three-phase transformer short-circuit parameter online monitoring method based on fundamental wave positive sequence component |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111722152A (en) * | 2020-06-29 | 2020-09-29 | 龚小娟 | Transformer winding deformation monitoring method and monitoring system |
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