CN114740246B - Automatic measuring device for working voltage of transformer - Google Patents
Automatic measuring device for working voltage of transformer Download PDFInfo
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- CN114740246B CN114740246B CN202210306359.6A CN202210306359A CN114740246B CN 114740246 B CN114740246 B CN 114740246B CN 202210306359 A CN202210306359 A CN 202210306359A CN 114740246 B CN114740246 B CN 114740246B
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- 230000033228 biological regulation Effects 0.000 claims abstract description 5
- 238000011156 evaluation Methods 0.000 claims description 21
- 238000005259 measurement Methods 0.000 claims description 13
- 230000008859 change Effects 0.000 claims description 3
- 230000009466 transformation Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/02—Measuring effective values, i.e. root-mean-square values
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/04—Measuring peak values or amplitude or envelope of ac or of pulses
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
- G01R23/02—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
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Abstract
The invention relates to an automatic measuring device for the working voltage of a transformer, which comprises a machine shell, a high-frequency voltmeter, an on-off switch group, a primary terminal wiring, a secondary terminal wiring, a display screen, a control panel and a central control module, wherein the primary terminal wiring is connected with the on-off switch group and used for connecting pins of a primary terminal of the transformer; the central control module is respectively connected with the high-frequency voltmeter, the on-off switch group, the display screen and the control panel. According to the invention, the on-off switch group is controlled by the central control module to carry out on-off regulation on each primary pin connection wire and each secondary pin connection wire, the high-frequency voltmeter detects the voltage in real time, the central control module analyzes the detected voltage value, the working state of the transformer is displayed, and the detection efficiency is accelerated.
Description
Technical Field
The invention relates to the technical field of voltage measurement, in particular to an automatic measuring device for working voltage of a transformer.
Background
The transformer is a device for changing alternating voltage by using the principle of electromagnetic induction, and main components are a primary coil, a secondary coil and an iron core. The main functions are as follows: voltage transformation, current transformation, impedance transformation, isolation, voltage stabilization, and the like.
When the transformer works, the working voltage of the transformer needs to be measured so as to know the working state of the transformer.
Chinese patent publication no: CN202433409U. The utility model discloses a cable joint test bar for carry out transformer operating voltage's detection, need the manual transformer pin of changing the measurement after 1 group of measurement each time. For example, if there are 6 transformer pin inputs and 8 transformer pin outputs, 48 operations are required, which is inefficient.
Therefore, the current transformer working voltage measuring process is complicated and consumes long time.
Disclosure of Invention
Therefore, the invention provides an automatic measuring device for the working voltage of a transformer, which is used for solving the problems of complicated measuring process and long time consumption of the working voltage of the transformer in the prior art.
In order to achieve the above object, the present invention provides an automatic measuring device for transformer operating voltage, comprising,
a housing;
the high-frequency voltmeter is arranged inside the shell and used for detecting the real-time voltage of the transformer;
the on-off switch group is connected with the high-frequency voltmeter and used for converting an end point accessed to the high-frequency voltmeter;
the primary terminal wiring is connected with the on-off switch group and used for connecting pins of primary terminals of the transformer, and a plurality of primary pin wirings are arranged at the tail ends of the primary terminal wiring;
the secondary terminal wiring is connected with the on-off switch group and used for connecting pins of a secondary terminal of the transformer, and a plurality of secondary pin wirings are arranged at the tail ends of the secondary terminal wiring;
the display screen is arranged on the surface of the shell and used for displaying the measured voltage data;
a control panel arranged on the surface of the casing and at one side of the display screen,
the high-frequency voltmeter detects voltage in real time, and the central control module analyzes the detected voltage value and displays the working state of the transformer.
Further, the primary pin connections comprise a first primary pin connection and a second primary pin connection;
the secondary pin wiring comprises a first secondary pin wiring, a second secondary pin wiring, a third secondary pin wiring and a fourth secondary pin wiring;
the first primary pin connection is connected with a first primary terminal of the transformer, and the second primary pin connection is connected with a second primary terminal of the transformer;
the first secondary pin wiring is connected with a first secondary terminal of the transformer, the second secondary pin wiring is connected with a second secondary terminal of the transformer, the third secondary pin wiring is connected with a third secondary terminal of the transformer, and the fourth secondary pin wiring is connected with a fourth secondary terminal of the transformer;
when the voltage is measured by adopting the automatic voltage measuring device, the central control module controls the on-off switch group to carry out on-off regulation on the connection of each primary pin and the connection of each secondary pin, and only one connection of the primary pin and one connection of the secondary pin are connected in one time.
Further, when the voltage is measured by using the automatic voltage measuring device, the central control module controls the on-off switch group to firstly access the first primary pin connection, and sequentially connect the first secondary pin connection, the second secondary pin connection, the third secondary pin connection and the fourth secondary pin connection, and record voltage data accessed by each group, after four groups of data records of the first primary pin connection are completed, the central control module controls the on-off switch group to control the first primary pin connection to access the second primary pin connection, and sequentially connect the first secondary pin connection, the second secondary pin connection, the third secondary pin connection and the fourth secondary pin connection, and record voltage data accessed by each group, after four groups of data records of the second primary pin connection are completed, the central control module determines that one measurement is completed, and analyzes eight groups of measured voltage data.
Further, when the ith primary pin wire and the jth secondary pin wire are connected, i =1,2, j =1,2,3,4, the high-frequency voltmeter measures the connected voltage value in real time and transmits the real-time measurement result to the central control module, the central control module integrates the measured voltage value, and after the single-group voltage detection time length t, the central control module generates a voltage fluctuation curve V when the ith primary pin wire and the jth secondary pin wire are connected ij After one-time measurement is finished, the central control module analyzes the eight groups of measured voltage data, determines effective value voltage values, voltage maximum values and fluctuation frequency values, and displays the data through the display screen.
Further, in the voltage fluctuation curve V ij During analysis, the central control module calculates a voltage fluctuation curve V ij Effective value voltage value P of ij ，
Wherein Kv is a voltage fluctuation curve V within a detection time t ij The voltage value at any moment;
the central control module is opposite to a voltage fluctuation curve V ij Analyzing to obtain a voltage fluctuation curve V ij Maximum value of peak voltage A ij And a fluctuating frequency value B ij 。
Further, the central control module is opposite to a voltage fluctuation curve V ij Analyzing to obtain a voltage fluctuation curve V ij Fluctuating frequency value B ij The central control module integrates the eight groups of fluctuation frequency value data to generate a fluctuation frequency value set B0, B0 (B) 11 ，B 12 ，B 13 ，B 14 ，B 21 ，B 22 ，B 23 ，B 24 ) And the central control module calculates the detected average fluctuation frequency value Bp and compares the data in the fluctuation frequency value set B0 with the average fluctuation frequency value Bp one by one so as to eliminate unstable frequency and obtain accurate frequency fluctuation.
Further, the central control module calculates a fluctuation frequency value B ij And the average fluctuation frequency value BAbsolute value of difference of p C ij ，C ij ＝∣B ij -Bp-, a central control module having a frequency difference evaluation value Cb, C ij Compared with the frequency difference evaluation value Cb,
when C is present ij When Cb is less than or equal to Cb, the central control module judges the fluctuation frequency value B ij The fluctuation difference value of (a) is in a reasonable range;
when C is present ij When Cb is greater than Cb, the central control module judges the fluctuation frequency value B ij The central control module controls the on-off switch group to firstly reconnect the wiring of the ith primary pin and the wiring of the jth secondary pin and acquire a new voltage fluctuation curve V ij The central control module is based on the new voltage fluctuation curve V ij Recalculating the average fluctuation frequency value Bp and calculating a new difference absolute value C ij Repeating the above step ij Comparing with the frequency difference evaluation value Cb until C ij ≤Cb；
When all data in the generated fluctuation frequency value set B0 satisfy C ij And when Cb is less than or equal to Cb, the central control module judges the average fluctuation frequency value Bp as the actual average fluctuation frequency.
Further, the frequency difference evaluation value Cb is represented by a difference absolute value C ij Determination of C ij The larger the Cb value.
Further, the central control module is opposite to a voltage fluctuation curve V ij Analyzing to obtain a voltage fluctuation curve V ij Maximum voltage value A of wave ij The central control module acquires a voltage fluctuation curve V ij And calculating a voltage fluctuation curve V ij The central control module calculates a voltage fluctuation curve V ij Maximum voltage value A of wave ij Ratio F to the average peak voltage Ap ij ,F ij ＝V ij Ap, a peak ratio evaluation parameter Fp is arranged in the central control module, and the central control module compares the ratio F ij Compared with the peak ratio evaluation parameter Fp,
when F is present ij When Fp is less than or equal to Fp, the central control module judges that A is greater than or equal to Fp ij As a voltage fluctuation curve V ij Actual maximum voltage ofA value;
when F is present ij When Fp is greater, the central control module determines A ij For sudden change values, the central control module obtains a voltage fluctuation curve V ij Second largest voltage value A of wave ij ', and calculating the second large voltage value A ij ' ratio F to average peak voltage value Ap ij ', the central control module compares the ratio F ij ' comparison with the Peak ratio evaluation parameter Fp when F ij When Fp is not more than ij Is a voltage fluctuation curve V ij The actual maximum voltage value of; when F is ij When' Fp is greater, the central control module determines a voltage fluctuation curve V ij The central control module controls the on-off switch group to firstly reconnect the wiring of the ith primary pin and the wiring of the jth secondary pin and acquire a new voltage fluctuation curve V ij Repeating the voltage value comparison operation until finding a voltage fluctuation curve V ij The actual maximum voltage value of.
Further, the central control module calculates actual maximum voltage values of the eight groups of voltage data one by one, compares the actual maximum voltage values, obtains the maximum value A of the actual maximum voltage values, and displays the maximum value A through the display screen.
Compared with the prior art, the transformer terminal voltage detection device has the advantages that different terminal voltages of the transformer can be detected quickly, the detection can be completed through one-time connection, and the detection speed is high.
Furthermore, when the voltage fluctuation frequency is obtained, the overall voltage frequency is detected, meanwhile, whether a certain voltage fluctuation which is detected independently meets the fluctuation deviation or not is judged by calculating the average fluctuation frequency and comparing the average data with the respective detected data, and when the data with overlarge fluctuation deviation exist, the numerical value corresponding to the group of data is detected again, so that all the data are in the reasonable range of the average frequency, and the accuracy of frequency detection is improved.
Further, when the maximum value of the voltage is obtained, the voltage fluctuation curve is analyzed, the average peak value of the curve is calculated, the maximum peak value on the curve is compared with the average peak value, when the data difference value between the maximum peak value and the average peak value is large, the central control module judges that the data at the moment is surge data of the voltage, and the central control module obtains the maximum data value again.
Drawings
Fig. 1 is a schematic structural diagram of an automatic measuring device for working voltage of a transformer according to an embodiment of the present invention.
Detailed Description
In order that the objects and advantages of the invention will be more clearly understood, the invention is further described below with reference to examples; it should be understood that the specific embodiments described herein are merely illustrative of the invention and do not delimit the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principles of the present invention, and do not limit the scope of the present invention.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Fig. 1 is a schematic structural diagram of an automatic measuring device for operating voltage of a transformer according to an embodiment of the present invention.
The embodiment provides an automatic measuring device for the working voltage of a transformer, which comprises,
a housing 1;
a high frequency voltmeter 2 arranged inside the housing for detecting a real-time voltage of the transformer;
the on-off switch group 3 is connected with the high-frequency voltmeter and used for converting an end point accessed to the high-frequency voltmeter;
the primary terminal wiring 4 is connected with the on-off switch group and used for connecting pins of primary terminals of the transformer, and a plurality of primary pin wirings are arranged at the tail ends of the primary terminal wiring;
the secondary terminal wiring 5 is connected with the on-off switch group and used for connecting pins of a secondary terminal of the transformer, and a plurality of secondary pin wirings are arranged at the tail ends of the secondary terminal wiring;
a display screen 6 disposed on the surface of the housing for displaying measured voltage data;
a control panel 7 arranged on the surface of the casing and at one side of the display screen,
and the central control module 8 is connected with the high-frequency voltmeter, the on-off switch group, the display screen and the control panel respectively, controls the on-off switch group to carry out on-off regulation on each primary pin wiring and each secondary pin wiring, detects voltage in real time by the high-frequency voltmeter, analyzes the detected voltage value and displays the working state of the transformer.
Further, the primary pin connections include a first primary pin connection 41, a second primary pin connection 42;
the secondary pin connections comprise a first secondary pin connection 51, a second secondary pin connection 52, a third secondary pin connection 53 and a fourth secondary pin connection 54;
the first primary pin connection is connected with a first primary terminal of a transformer, and the second primary pin connection is connected with a second primary terminal of the transformer;
the first secondary pin wiring is connected with a first secondary terminal of the transformer, the second secondary pin wiring is connected with a second secondary terminal of the transformer, the third secondary pin wiring is connected with a third secondary terminal of the transformer, and the fourth secondary pin wiring is connected with a fourth secondary terminal of the transformer;
when the voltage is measured by adopting the automatic voltage measuring device, the central control module controls the on-off switch group to carry out on-off regulation on the connection of each primary pin and the connection of each secondary pin, and only one connection of the primary pin and one connection of the secondary pin are connected in one time.
Specifically, when the voltage is measured by using the automatic voltage measuring device, the central control module controls the on-off switch group to firstly access the first primary pin connection, and sequentially access the first secondary pin connection, the second secondary pin connection, the third secondary pin connection and the fourth secondary pin connection, and records voltage data accessed by each group, after four groups of data records of the first primary pin connection are completed, the central control module controls the on-off switch group to control the first primary pin connection to access the second primary pin connection, and sequentially access the first secondary pin connection, the second secondary pin connection, the third secondary pin connection and the fourth secondary pin connection, and records voltage data accessed by each group, after four groups of data records of the second primary pin connection are completed, the central control module determines that one measurement is completed, and analyzes eight groups of measured voltage data.
Specifically, when the ith primary pin wiring and the jth secondary pin wiring are connected, i =1,2, j =1,2,3,4, the high-frequency voltmeter measures the connected voltage value in real time and transmits the real-time measurement result to the central control module, the central control module integrates the measured voltage value, and after the single-group voltage detection time t, the central control module generates a voltage fluctuation curve V when the ith primary pin wiring and the jth secondary pin wiring are connected ij After one-time measurement is finished, the central control module analyzes the eight groups of measured voltage data, determines effective value voltage values, voltage maximum values and fluctuation frequency values, and displays the data through the display screen.
In particular, in the voltage fluctuation curve V ij During analysis, the central control module calculates a voltage fluctuation curve V ij Effective value voltage value P of ij ，
Wherein Kv is a voltage fluctuation curve V within a detection time t ij The voltage value at any moment;
the central control module is opposite to a voltage fluctuation curve V ij Analyzing to obtain a voltage fluctuation curve V ij Maximum value of peak voltage A ij And a fluctuating frequency value B ij 。
In particular, the central control module is aligned to a voltage fluctuation curve V ij Analyzing to obtain a voltage fluctuation curve V ij Fluctuating frequency value B ij The central control module integrates the eight groups of fluctuation frequency value data to generate a fluctuation frequency value set B0, B0 (B) 11 ，B 12 ，B 13 ，B 14 ，B 21 ，B 22 ，B 23 ，B 24 ) And the central control module calculates the detected average fluctuation frequency value Bp and compares the data in the fluctuation frequency value set B0 with the average fluctuation frequency value Bp one by one so as to eliminate unstable frequency and obtain accurate frequency fluctuation.
Specifically, the central control module calculates a fluctuation frequency value B ij The absolute value C of the difference from the average fluctuation frequency value Bp ij ，C ij ＝∣B ij -Bp-, a central control module having a frequency difference evaluation value Cb, C ij Compared with the frequency difference evaluation value Cb,
when C is present ij When Cb is less than or equal to Cb, the central control module judges the fluctuation frequency value B ij The fluctuation difference value of (a) is in a reasonable range;
when C is present ij When Cb is greater than Cb, the central control module judges the fluctuation frequency value B ij The central control module controls the on-off switch group to firstly reconnect the wiring of the ith primary pin and the wiring of the jth secondary pin and acquire a new voltage fluctuation curve V ij The central control module is based on the new voltage fluctuation curve V ij Recalculating the average fluctuation frequency value Bp and calculating a new difference absolute value C ij Repeating the above step ij Comparing with the frequency difference evaluation value Cb until C ij ≤Cb；
When all data in the generated fluctuation frequency value set B0 satisfy C ij And when Cb is less than or equal to Cb, the central control module judges the average fluctuation frequency value Bp as the actual average fluctuation frequency.
When the voltage fluctuation frequency is obtained, the overall voltage frequency is detected, meanwhile, whether a certain voltage fluctuation detected independently accords with the fluctuation deviation or not is judged by calculating the average fluctuation frequency and comparing the average data with the respective detected data, and when the data with overlarge fluctuation deviation exist, the numerical value corresponding to the group of data is detected again, so that all the data are in the reasonable range of the average frequency, and the accuracy of frequency detection is improved.
Specifically, the frequency difference evaluation value Cb is represented by a difference absolute value C ij Determination of C ij The larger the Cb value.
In particular, the central control module is aligned to a voltage fluctuation curve V ij Analyzing to obtain a voltage fluctuation curve V ij Maximum voltage value A of wave ij The central control module acquires a voltage fluctuation curve V ij And calculating a voltage fluctuation curve V ij The central control module calculates a voltage fluctuation curve V ij Maximum voltage value A of wave ij Ratio F to the average peak voltage Ap ij ,F ij ＝V ij Ap, a peak ratio evaluation parameter Fp is arranged in the central control module, and the central control module compares the ratio F ij Compared with the peak ratio evaluation parameter Fp,
when F is present ij When Fp is less than or equal to Fp, the central control module judges that A is greater than or equal to Fp ij As a voltage fluctuation curve V ij The actual maximum voltage value of;
when F is present ij When Fp is greater, the central control module determines A ij For the sudden change value, the central control module acquires a voltage fluctuation curve V ij Second largest voltage value A of wave ij ', and calculate the secondLarge voltage value A ij ' ratio F to average peak voltage value Ap ij ', the central control module compares the ratio F ij ' comparison with the Peak ratio evaluation parameter Fp when F ij When Fp is not more than ij Is a voltage fluctuation curve V ij The actual maximum voltage value of; when F is present ij When' Fp is greater, the central control module determines a voltage fluctuation curve V ij The central control module controls the on-off switch group to firstly reconnect the wiring of the ith primary pin and the wiring of the jth secondary pin and acquire a new voltage fluctuation curve V ij Repeating the voltage value comparison operation until finding a voltage fluctuation curve V ij The actual maximum voltage value of.
When the maximum value of the voltage is obtained, analyzing a voltage fluctuation curve, calculating an average peak value of the curve, comparing the maximum peak value with the average peak value on the curve, when the data difference value between the maximum peak value and the average peak value is large, the central control module judges the data at the moment as surge data of the voltage, and the central control module obtains the maximum data value again.
Specifically, the central control module calculates actual maximum voltage values of eight groups of voltage data one by one, compares the actual maximum voltage values, obtains the maximum value A of the actual maximum voltage values, and displays the maximum value A through the display screen.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is apparent to those skilled in the art that the scope of the present invention is not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (5)
1. An automatic measuring device for the working voltage of a transformer is characterized by comprising,
a housing;
the high-frequency voltmeter is arranged inside the shell and used for detecting the real-time voltage of the transformer;
the on-off switch group is connected with the high-frequency voltmeter and used for converting an end point accessed to the high-frequency voltmeter;
the primary terminal wiring is connected with the on-off switch group and used for connecting pins of primary terminals of the transformer, and a plurality of primary pin wirings are arranged at the tail ends of the primary terminal wiring;
the secondary terminal wiring is connected with the on-off switch group and used for connecting pins of a secondary terminal of the transformer, and a plurality of secondary pin wirings are arranged at the tail ends of the secondary terminal wiring;
the display screen is arranged on the surface of the shell and used for displaying the measured voltage data;
a control panel arranged on the surface of the casing and at one side of the display screen,
the central control module is connected with the high-frequency voltmeter, the on-off switch group, the display screen and the control panel respectively, the central control module controls the on-off switch group to carry out on-off adjustment on each primary pin connection and each secondary pin connection, the high-frequency voltmeter detects voltage in real time, and the central control module analyzes the detected voltage value and displays the working state of the transformer;
the primary pin connection lines comprise a first primary pin connection line and a second primary pin connection line;
the secondary pin wiring comprises a first secondary pin wiring, a second secondary pin wiring, a third secondary pin wiring and a fourth secondary pin wiring;
the first primary pin connection is connected with a first primary terminal of a transformer, and the second primary pin connection is connected with a second primary terminal of the transformer;
the first secondary pin wiring is connected with a first secondary terminal of the transformer, the second secondary pin wiring is connected with a second secondary terminal of the transformer, the third secondary pin wiring is connected with a third secondary terminal of the transformer, and the fourth secondary pin wiring is connected with a fourth secondary terminal of the transformer;
when the voltage is measured by adopting the automatic voltage measuring device, the central control module controls the on-off switch group to carry out on-off regulation on each primary pin connection wire and each secondary pin connection wire, and only one primary pin connection wire and one secondary pin connection wire are connected in one time;
when voltage measurement is carried out by adopting an automatic voltage measuring device, the central control module controls the on-off switch group to firstly access the first primary pin connection, and sequentially access the first secondary pin connection, the second secondary pin connection, the third secondary pin connection and the fourth secondary pin connection, and records voltage data accessed by each group, after four groups of data records of the first primary pin connection are finished, the central control module controls the on-off switch group to control the first primary pin connection to access the second primary pin connection, and sequentially access the first secondary pin connection, the second secondary pin connection, the third secondary pin connection and the fourth secondary pin connection, and records voltage data accessed by each group, after four groups of data records of the second primary pin connection are finished, the central control module judges that one measurement is finished, and analyzes eight groups of measured voltage data;
when the ith primary pin connection wire and the jth secondary pin connection wire are connected, i =1,2, j =1,2,3,4, the high-frequency voltmeter measures the connected voltage value in real time and transmits the real-time measurement result to the central control module, the central control module integrates the measured voltage value, and after the single-group voltage detection time length t, the central control module generates a voltage fluctuation curve V when the ith primary pin connection wire and the jth secondary pin connection wire are connected ij After one measurement is finished, the central control module analyzes the eight groups of measured voltage data, determines effective value voltage values, voltage maximum values and fluctuation frequency values, and displays the data through the display screen;
in the voltage fluctuation curve V ij During analysis, the central control module calculates a voltage fluctuation curve V ij Effective value voltage value P of ij ，
Wherein,kv is a voltage fluctuation curve V within the detection time t ij The voltage value at any moment;
the central control module is opposite to a voltage fluctuation curve V ij Analyzing to obtain a voltage fluctuation curve V ij Maximum value of peak voltage A ij And a fluctuating frequency value B ij ；
The central control module is opposite to a voltage fluctuation curve V ij Analyzing to obtain a voltage fluctuation curve V ij Fluctuating frequency value B ij The central control module integrates the eight groups of fluctuation frequency value data to generate a fluctuation frequency value set B0, B0 (B) 11 ，B 12 ，B 13 ，B 14 ，B 21 ，B 22 ，B 23 ，B 24 ) The central control module calculates the average fluctuation frequency value Bp detected, and compares the data in the fluctuation frequency value set B0 with the average fluctuation frequency value Bp one by one so as to eliminate unstable frequency and obtain accurate frequency fluctuation.
2. The automatic measuring device of transformer operating voltage according to claim 1, wherein the central control module calculates a fluctuation frequency value B ij The absolute value C of the difference from the average fluctuation frequency value Bp ij ，C ij ＝∣B ij -Bp-, a frequency difference evaluation value Cb is arranged in the central control module, C is set by the central control module ij Compared with the frequency difference evaluation value Cb,
when C is present ij When Cb is less than or equal to Cb, the central control module judges the fluctuation frequency value B ij The fluctuation difference value of (a) is in a reasonable range;
when C is present ij When Cb is greater than Cb, the central control module judges the fluctuation frequency value B ij The central control module controls the on-off switch group to firstly reconnect the wiring of the ith primary pin and the wiring of the jth secondary pin and acquire a new voltage fluctuation curve V ij The central control module is based on the new voltage fluctuation curve V ij Recalculating the average fluctuation frequency value Bp and calculating a new difference absolute value C ij Repeating the above step C ij Comparing with the frequency difference evaluation value Cb until C ij ≤Cb；
When all data in the generated fluctuation frequency value set B0 satisfy C ij And when Cb is less than or equal to Cb, the central control module judges the average fluctuation frequency value Bp as the actual average fluctuation frequency.
3. The automatic measuring device of claim 2, wherein the frequency difference evaluation Cb value is defined by a difference absolute value C ij Determination of C ij The larger the Cb value.
4. The automatic measuring device of transformer operating voltage according to claim 1, characterized in that the central control module is aligned with a voltage fluctuation curve V ij Analyzing to obtain a voltage fluctuation curve V ij Maximum voltage value A of wave ij The central control module acquires a voltage fluctuation curve V ij And calculating a voltage fluctuation curve V ij The central control module calculates a voltage fluctuation curve V ij Maximum voltage value A of wave ij Ratio F to the average peak voltage Ap ij ,F ij ＝V ij Ap, a peak ratio evaluation parameter Fp is arranged in the central control module, and the central control module compares the ratio F ij Compared with the peak ratio evaluation parameter Fp,
when F is present ij When Fp is less than or equal to the preset value, the central control module judges A ij As a voltage fluctuation curve V ij The actual maximum voltage value of;
when F is present ij When Fp is greater, the central control module determines A ij For sudden change values, the central control module obtains a voltage fluctuation curve V ij Second largest voltage value A of wave ij ', and calculating the second large voltage value A ij ' ratio F to average peak voltage value Ap ij ', the central control module compares the ratio F ij ' comparison with the Peak ratio evaluation parameter Fp when F ij When Fp is not more than ij Is a voltage fluctuation curve V ij The actual maximum voltage value of; when F is ij When' > Fp, the central control module determines a voltage fluctuation curve V ij Is not stable, the central control module controls theThe on-off switch group firstly re-accesses the wiring of the ith primary pin and the wiring of the jth secondary pin and acquires a new voltage fluctuation curve V ij Repeating the voltage value comparison operation until finding a voltage fluctuation curve V ij The actual maximum voltage value of.
5. The automatic measuring device of the working voltage of the transformer as claimed in claim 4, wherein the central control module calculates the actual maximum voltage values of eight groups of voltage data one by one and compares the actual maximum voltage values to obtain the maximum value A of the actual maximum voltage values, and the maximum value A is displayed through the display screen.
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Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102508087A (en) * | 2011-12-26 | 2012-06-20 | 石家庄供电公司 | Integrated test stand for transformers |
| CN202433409U (en) * | 2011-12-26 | 2012-09-12 | 上海置信电气非晶有限公司 | Testing rod for cable connector |
| RU2486532C1 (en) * | 2011-12-23 | 2013-06-27 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Ставропольский государственный аграрный университет" | Device to control deformation of power transformer windings |
| WO2013104197A1 (en) * | 2012-01-11 | 2013-07-18 | 陕西电力科学研究院 | Method for testing electromagnetic compatibility of electronic mutual inductor |
| CN204302401U (en) * | 2014-11-24 | 2015-04-29 | 武汉华电高科电气设备有限公司 | A kind of three-phase Special Transformer Ratio measurement mechanism |
| CN105527522A (en) * | 2016-01-14 | 2016-04-27 | 苏州成科自控设备有限公司 | Transformer detection device |
| CN205826731U (en) * | 2016-05-26 | 2016-12-21 | 广州安博检测有限公司 | Running voltage measuring box |
| CN106324444A (en) * | 2015-06-23 | 2017-01-11 | 中国电力科学研究院 | Transformer test platform |
| CN111722061A (en) * | 2020-07-01 | 2020-09-29 | 上海恒敬电力科技有限公司 | But early warning device of remote monitoring power distribution station overvoltage operation |
| CN112783251A (en) * | 2021-01-05 | 2021-05-11 | 黄山学院 | Transformer voltage tracking feedback automatic adjusting device and adjusting method thereof |
| CN113156339A (en) * | 2021-03-05 | 2021-07-23 | 国网山东省电力公司电力科学研究院 | Distribution transformer testing platform |
| CN214278383U (en) * | 2020-11-24 | 2021-09-24 | 苏州熠品质量技术服务有限公司 | Leakage current test system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| UA85784C2 (en) * | 2007-09-06 | 2009-02-25 | Владимир Ульянович Кизилов | Device for accuracy increase of instrument voltage transformer |
| KR102583722B1 (en) * | 2018-12-27 | 2023-09-27 | 주식회사 에이텀 | A transformer |
| CN213275734U (en) * | 2020-07-22 | 2021-05-25 | 广东泰坦智能动力有限公司 | Isolated bus voltage sampling circuit |
| CN113447698B (en) * | 2021-06-11 | 2022-03-08 | 南方电网数字电网研究院有限公司 | Voltage measurement circuit, method and apparatus |
| CN113839545B (en) * | 2021-11-25 | 2022-02-08 | 深圳市兴中科电源科技有限公司 | Switching power supply system with overshoot suppression circuit |
-
2022
- 2022-03-25 CN CN202210306359.6A patent/CN114740246B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2486532C1 (en) * | 2011-12-23 | 2013-06-27 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Ставропольский государственный аграрный университет" | Device to control deformation of power transformer windings |
| CN102508087A (en) * | 2011-12-26 | 2012-06-20 | 石家庄供电公司 | Integrated test stand for transformers |
| CN202433409U (en) * | 2011-12-26 | 2012-09-12 | 上海置信电气非晶有限公司 | Testing rod for cable connector |
| WO2013104197A1 (en) * | 2012-01-11 | 2013-07-18 | 陕西电力科学研究院 | Method for testing electromagnetic compatibility of electronic mutual inductor |
| CN204302401U (en) * | 2014-11-24 | 2015-04-29 | 武汉华电高科电气设备有限公司 | A kind of three-phase Special Transformer Ratio measurement mechanism |
| CN106324444A (en) * | 2015-06-23 | 2017-01-11 | 中国电力科学研究院 | Transformer test platform |
| CN105527522A (en) * | 2016-01-14 | 2016-04-27 | 苏州成科自控设备有限公司 | Transformer detection device |
| CN205826731U (en) * | 2016-05-26 | 2016-12-21 | 广州安博检测有限公司 | Running voltage measuring box |
| CN111722061A (en) * | 2020-07-01 | 2020-09-29 | 上海恒敬电力科技有限公司 | But early warning device of remote monitoring power distribution station overvoltage operation |
| CN214278383U (en) * | 2020-11-24 | 2021-09-24 | 苏州熠品质量技术服务有限公司 | Leakage current test system |
| CN112783251A (en) * | 2021-01-05 | 2021-05-11 | 黄山学院 | Transformer voltage tracking feedback automatic adjusting device and adjusting method thereof |
| CN113156339A (en) * | 2021-03-05 | 2021-07-23 | 国网山东省电力公司电力科学研究院 | Distribution transformer testing platform |
Non-Patent Citations (1)
| Title |
|---|
| GB4943中工作电压测试的分析;杨璐;《电信网技术》;20121231(第12期);第57-60页 * |
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