CN114487929A - Automatic switching ratio-variable direct resistance measuring device and method - Google Patents
Automatic switching ratio-variable direct resistance measuring device and method Download PDFInfo
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- CN114487929A CN114487929A CN202210037604.8A CN202210037604A CN114487929A CN 114487929 A CN114487929 A CN 114487929A CN 202210037604 A CN202210037604 A CN 202210037604A CN 114487929 A CN114487929 A CN 114487929A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/62—Testing of transformers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
Abstract
The device comprises a storage display unit, a PLC control measuring unit, a transformation ratio measuring unit, a direct current resistance measuring unit and a measured transformer, wherein the storage display unit is connected with the PLC control measuring unit and used for displaying and storing measured data; the PLC control measuring unit is respectively connected with the transformation ratio measuring unit, the direct current resistance measuring unit, the low-voltage winding side contactor and the high-voltage winding side contactor through transmission lines; the low-voltage winding side of the tested transformer is connected to the low-voltage ports of the transformation ratio measuring unit and the direct-current resistance measuring unit through the low-voltage winding contactor, and the high-voltage winding side of the tested transformer is connected to the high-voltage ports of the transformation ratio measuring unit and the direct-current resistance measuring unit through the high-voltage winding contactor. The invention has the advantages of high automation degree, simple inspection process, labor saving and obviously improved working efficiency.
Description
Technical Field
The application relates to the field of distribution transformer detection, in particular to an automatic switching transformation ratio direct resistance measuring device and method.
Background
When the distribution transformer is subjected to factory inspection in the current stage, different instruments are usually connected with the distribution transformer respectively to inspect the distribution transformer, and different detection instruments need to be manually wired in the inspection process, so that the inspection process is complex, manual work is consumed, the working efficiency is low, the inspection cost is high, particularly, when transformer transformation ratio and direct current resistance are detected, the wiring is time-consuming and labor-consuming, meanwhile, automatic switching cannot be performed, manual operation is needed, and the automation degree is low.
Disclosure of Invention
The embodiment of the application aims to provide an automatic switching transformation ratio direct-current resistance measuring device and method, and the transformation ratio and direct-current resistance measurement can be automatically switched by controlling a measuring unit and a wiring mode of a specially designed contactor through a PLC, so that the labor cost is saved.
In order to achieve the above purpose, the present application provides the following technical solutions:
in a first aspect, the embodiment of the present application provides an automatic switching transformation ratio direct resistance measurement apparatus, which includes a storage display unit, a PLC control measurement unit, a transformation ratio measurement unit, a direct current resistance measurement unit, and a measured transformer,
the storage display unit is connected with the PLC control measuring unit and used for displaying and storing the measured data;
the PLC control measuring unit is respectively connected with the transformation ratio measuring unit, the direct current resistance measuring unit, the low-voltage winding side contactor and the high-voltage winding side contactor through transmission lines;
the low-voltage winding side of the tested transformer is connected to the low-voltage ports of the transformation ratio measuring unit and the direct-current resistance measuring unit through the low-voltage winding contactor, and the high-voltage winding side of the tested transformer is connected to the high-voltage ports of the transformation ratio measuring unit and the direct-current resistance measuring unit through the high-voltage winding contactor.
The direct current port 1I + of the direct current resistance measurement unit is connected with contactors KM1, KM2 and KM3 which are connected in parallel, the direct current port 1I-of the direct current resistance measurement unit is connected with contactors KM4, KM5, KM6 and KM7 which are connected in parallel, the direct current port 2I + of the direct current resistance measurement unit is connected with contactors KM10, KM11 and KM12 which are connected in parallel, the direct current port 2I-of the direct current resistance measurement unit is connected with contactors KM13, KM14 and KM15 which are connected in parallel, the direct current voltage port 1U + of the direct current resistance measurement unit is connected with contactors KM1 ', KM2 ' and KM3 ' which are connected in parallel, the direct current voltage port 1U-of the direct current resistance measurement unit is connected with contactors KM4 ', KM5 ', KM6 ' and KM7 ' which are connected in parallel, and the direct current voltage port 2U + of the direct current resistance measurement unit is connected with contactors KM10 ', and KM10 ' which are connected in parallel, KM11 ' and KM12 ', the DC current port 2U-of the DC resistance measuring unit is connected with the contactors KM13 ', KM14 ' and KM15 ' which are connected in parallel, the low-voltage end interface of the transformation ratio measuring unit is connected with the contactor KM8, and the high-voltage end interface of the transformation ratio measuring unit is connected with the contactor KM 9.
On the other hand, the embodiment of the application provides an automatic switching transformation ratio direct resistance measurement method, which comprises transformation ratio measurement and direct resistance measurement and comprises the following specific steps:
adjusting the gear of the transformer to 1;
starting voltage ratio measurement, the PLC controls the measurement unit to send a command, controls to switch on the contactor KM8 through a transmission line L1, and controls to switch off the contactors KM1-KM7 and KM1 '-KM 7'; the contactor KM9 is controlled to be switched on through a transmission line L4, and the contactors KM10-KM15, KM10 '-KM 15' are controlled to be switched off;
the PLC controls the measuring unit to send out an instruction, and controls the transformation ratio measuring unit to start measuring through a transmission line L2;
after the measurement is completed by the transformation ratio measuring unit, the measured data is transmitted back to the PLC control measuring unit, is transmitted to the storage display unit after data processing, is displayed and stored, and then transformation ratio measurement is completed;
the PLC controls the measuring unit to send out an instruction, and controls the direct current resistance measuring unit to start direct current resistance measurement through a transmission line L3;
adjusting the gear of the transformer to 2;
repeating the steps to complete the transformation ratio measurement and the direct current resistance measurement;
and adjusting the gears of the transformer repeatedly until all the gears are finished.
The direct current resistance measurement comprises the following specific steps:
and (3) measuring the direct resistance of the winding AB:
the PLC controls the measurement unit to send out an instruction, and controls the disconnecting contactors KM1-KM8 and KM1 '-KM 7' through a transmission line L1; the contactors KM10, KM14, KM10 ', KM14 ' are controlled to be switched on and off through a transmission line L4, and the contactors KM11-KM13, KM15, KM11 ' -KM13 ', KM15 ' are controlled to be switched off;
the PLC controls the measuring unit to send out an instruction, and controls the direct current resistance measuring unit to start measuring through a transmission line L3;
after the direct current resistance measurement unit finishes measurement, the measured data are transmitted back to the PLC control measurement unit, are transmitted to the storage display unit after data processing, are displayed and stored, and finish the measurement of the AB direct resistance of the winding;
measuring the direct resistance of a winding BC:
the PLC controls the measurement unit to send out an instruction, and controls the disconnecting contactors KM1-KM8 and KM1 '-KM 7' through a transmission line L1; the contactors KM11, KM15, KM11 ', KM15 ' are controlled to be switched on and off through a transmission line L4, and the contactors KM12-KM13, KM10, KM12 ' -KM13 ', KM10 ' are controlled to be switched off;
the PLC controls the measuring unit to send out an instruction, and controls the direct current resistance measuring unit to start measuring through a transmission line L3;
after the direct current resistance measurement unit finishes measurement, the measured data are transmitted back to the PLC control measurement unit, are transmitted to the storage display unit after data processing, are displayed and stored, and finish the BC direct resistance measurement of the winding;
measuring the direct resistance of a winding CA:
the PLC controls the measurement unit to send out an instruction, and controls the disconnecting contactors KM1-KM8 and KM1 '-KM 7' through a transmission line L1; the contactors KM12-KM13 and KM12 '-KM 13' are controlled to be switched on and off through a transmission line L4, and the contactors KM10-KM11, KM14-KM15, KM10 '-KM 11', KM14 '-KM 15' are controlled to be switched off;
the PLC controls the measuring unit to send out an instruction, and controls the direct current resistance measuring unit to start measuring through a transmission line L3;
after the direct current resistance measurement unit finishes measurement, the measured data are transmitted back to the PLC control measurement unit, are transmitted to the storage display unit after data processing, are displayed and stored, and finish the direct resistance measurement of the winding CA;
measuring the direct resistance of the winding an:
the PLC controls the measurement unit to send out an instruction, and controls the disconnecting contactors KM9-KM15 and KM10 '-KM 15' through a transmission line L4; the contactors KM1, KM7, KM1 ', KM 7' are controlled to be switched on and off through a transmission line L1, and the contactors KM2-KM6, KM2 '-KM 6', KM8 are controlled to be switched off;
the PLC controls the measuring unit to send out an instruction, and controls the direct current resistance measuring unit to start measuring through a transmission line L3;
after the direct-current resistance measurement unit finishes measurement, the measured data are transmitted back to the PLC control measurement unit, are transmitted to the storage display unit after data processing, are displayed and stored, and finish the measurement of the an direct resistance of the winding;
measuring the direct resistance around bn:
the PLC controls the measuring unit to send out an instruction, and controls the disconnecting contactors KM9-KM15 and KM10 '-KM 15' through a transmission line L4; the contactors KM2, KM7, KM2 ', KM7 ' are controlled to be switched on and off through a transmission line L1, and the contactors KM3-KM6, KM1, KM3 ' -KM6 ', KM1 ' are controlled to be switched off;
the PLC controls the measuring unit to send out an instruction, and controls the direct current resistance measuring unit to start measuring through a transmission line L3;
after the direct-current resistance measurement unit finishes measurement, returning measurement data to the PLC control measurement unit, transmitting the measurement data to the storage display unit after data processing, displaying the measurement data and storing the data to finish direct resistance measurement of the winding bn;
measuring the direct resistance around cn:
the PLC controls the measurement unit to send out an instruction, and controls the disconnecting contactors KM9-KM15 and KM9 '-KM 15' through a transmission line L4; the contactors KM3, KM7, KM3 ', KM 7' are controlled to be switched on and off through a transmission line L1, and the contactors KM1-KM2 and KM4-KM6 are controlled to be switched off;
the PLC controls the measuring unit to send out an instruction, and controls the direct current resistance measuring unit to start measuring through a transmission line L3;
and after the direct current resistance measurement unit finishes measurement, the measurement data are transmitted back to the PLC control measurement unit, are transmitted to the storage display unit after data processing, are displayed and stored, and finish the direct resistance measurement of the winding cn.
Compared with the prior art, the invention has the beneficial effects that:
the invention is used for the transformation ratio measurement and the direct current resistance measurement of the transformer, can control the automatic switching of the measurement unit through the PLC, has high measurement automation degree, simple wiring, labor saving and obviously improved working efficiency.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of an automatic switching ratio-changing direct resistance measuring device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
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, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
As shown in FIG. 1, an automatic switching transformation ratio direct resistance measuring device comprises a storage display unit 1, a PLC control measuring unit 2, a transformation ratio measuring unit 3, a direct resistance measuring unit 4 and a measured transformer 5,
the storage display unit 1 is connected with the PLC control measuring unit 2 and used for displaying and storing measured data;
the PLC control measuring unit 2 is respectively connected with the transformation ratio measuring unit 3, the direct current resistance measuring unit 4, the low-voltage winding side contactor and the high-voltage winding side contactor through transmission lines;
the low-voltage winding side of the tested transformer 5 is connected to the low-voltage ports of the transformation ratio measuring unit 3 and the direct-current resistance measuring unit 4 through a low-voltage winding contactor, and the high-voltage winding side of the tested transformer 5 is connected to the high-voltage ports of the transformation ratio measuring unit 3 and the direct-current resistance measuring unit 4 through a high-voltage winding contactor.
The direct current port 1I + of the direct current resistance measurement unit 4 is connected with contactors KM1, KM2 and KM3 which are connected in parallel, the direct current port 1I-of the direct current resistance measurement unit 4 is connected with contactors KM4, KM5, KM6 and KM7 which are connected in parallel, the direct current port 2I + of the direct current resistance measurement unit 4 is connected with contactors KM10, KM11 and KM12 which are connected in parallel, the direct current port 2I-of the direct current resistance measurement unit 4 is connected with contactors KM13, KM14 and KM15 which are connected in parallel, the direct current voltage port 1U + of the direct current resistance measurement unit 4 is connected with contactors KM1 ', KM 2' and KM3 'which are connected in parallel, the direct current voltage port 1U-of the direct current resistance measurement unit 4 is connected with contactors KM 4', KM5 ', KM 6' and KM7 'which are connected in parallel, the direct current voltage port 2U + of the direct current resistance measurement unit 4 is connected with contactors KM 10', which are connected in parallel, KM11 ' and KM12 ', the DC current port 2U-of the DC resistance measuring unit 4 is connected with the contactors KM13 ', KM14 ' and KM15 ' which are connected in parallel, the low-voltage end interface of the transformation ratio measuring unit 3 is connected with the contactor KM8, and the high-voltage end interface of the transformation ratio measuring unit 3 is connected with the contactor KM 9.
As shown in fig. 1, one end of a specific contactor KM1 is connected to the port a of the transformer 5 under test, the other end is connected to the dc current port 1I + of the dc resistance measurement unit 4, one end of a contactor KM2 is connected to the port b of the transformer 5 under test, the other end is connected to the dc current port 1I + of the dc resistance measurement unit 4, one end of a contactor KM3 is connected to the port c of the transformer 5 under test, the other end is connected to the dc current port 1I + of the dc resistance measurement unit 4, one end of a contactor KM4 is connected to the port a of the transformer 5 under test, the other end is connected to the dc current port 1I-, one end of a contactor KM5 is connected to the port b of the transformer 5 under test, the other end is connected to the dc current port 1I-, one end of a contactor KM6 is connected to the port c of the transformer 5 under test, the other end is connected to the dc current port 1I-of the dc resistance measurement unit 4, one end of the contactor KM7 is connected with the n port of the tested transformer 5, and the other end is connected with the direct current port 1I-of the direct current resistance measuring unit 4.
One end of the contactor KM1 'is connected with the port a of the tested transformer 5, the other end is connected with the DC voltage port 1U + of the DC resistance measurement unit 4, one end of the contactor KM 2' is connected with the port b of the tested transformer 5, the other end is connected with the DC voltage port 1U + of the DC resistance measurement unit 4, one end of the contactor KM3 'is connected with the port c of the tested transformer 5, the other end is connected with the DC voltage port 1U + of the DC resistance measurement unit 4, one end of the contactor KM 4' is connected with the port a of the tested transformer 5, the other end is connected with the DC voltage port 1U-of the DC resistance measurement unit 4, one end of the contactor KM5 'is connected with the port b of the tested transformer 5, the other end is connected with the DC voltage port 1U-of the DC resistance measurement unit 4, one end of the contactor KM 6' is connected with the port c of the tested transformer 5, the other end is connected with the port 1U-of the DC voltage port of the DC resistance measurement unit 4, one end of the contactor KM 7' is connected with the n port of the tested transformer 5, and the other end is connected with the direct current voltage port 1U-of the direct current resistance measuring unit 4.
One end of the contactor KM10 is connected to the port a of the transformer 5 to be tested, the other end is connected to the dc current port 2I + of the dc resistance measurement unit 4, one end of the contactor KM11 is connected to the port B of the transformer 5 to be tested, the other end is connected to the dc current port 2I + of the dc resistance measurement unit 4, one end of the contactor KM12 is connected to the port C of the transformer 5 to be tested, the other end is connected to the dc current port 2I + of the dc resistance measurement unit 4, one end of the contactor KM13 is connected to the port a of the transformer 5 to be tested, the other end is connected to the dc current port 2I-, one end of the contactor KM15 is connected to the port C of the transformer 5 to be tested, and the other end is connected to the dc current port 2I-of the dc resistance measurement unit 4.
One end of the contactor KM10 'is connected to the port a of the transformer 5 under test, the other end is connected to the dc voltage port 2U + of the dc resistance measurement unit 4, one end of the contactor KM 11' is connected to the port B of the transformer 5 under test, the other end is connected to the dc voltage port 2U + of the dc resistance measurement unit 4, one end of the contactor KM12 'is connected to the port C of the transformer 5 under test, the other end is connected to the dc voltage port 2U + of the dc resistance measurement unit 4, one end of the contactor KM 13' is connected to the port a of the transformer 5 under test, the other end is connected to the dc voltage port 2U-of the dc resistance measurement unit 4, one end of the contactor KM14 'is connected to the port B of the transformer 5 under test, the other end is connected to the dc voltage port 2U-of the dc resistance measurement unit 4, one end of the contactor KM 15' is connected to the port C of the transformer 5 under test, and the other end is connected to the port 2U-of the dc voltage port 2 of the dc resistance measurement unit 4.
An automatic switching transformation ratio direct resistance measurement method comprises transformation ratio measurement and direct resistance measurement, and comprises the following specific steps:
adjusting the gear of the transformer to 1;
starting voltage ratio measurement, the PLC controls the measurement unit 2 to send a command, controls the contactor KM8 to be switched on through a transmission line L1, and controls the contactors KM1-KM7 and KM1 '-KM 7' to be switched off; the contactor KM9 is controlled to be switched on through a transmission line L4, and the contactors KM10-KM15, KM10 '-KM 15' are controlled to be switched off;
the PLC controls the measuring unit 2 to send out an instruction, and controls the transformation ratio measuring unit 3 to start measuring through a transmission line L2;
after the measurement is completed by the transformation ratio measuring unit, the measured data is transmitted back to the PLC control measuring unit, is transmitted to the storage display unit after data processing, is displayed and stored, and then transformation ratio measurement is completed;
the PLC controls the measuring unit 2 to send out an instruction, and controls the direct current resistance measuring unit 4 to start direct current resistance measurement through a transmission line L3;
adjusting the gear of the transformer to 2;
repeating the steps to complete the transformation ratio measurement and the direct current resistance measurement;
and adjusting the gears of the transformer repeatedly until all the gears are finished.
The direct current resistance measurement comprises the following specific steps:
and (3) measuring the direct resistance of the winding AB:
the PLC controls the measuring unit 2 to send out an instruction, and controls the disconnecting contactors KM1-KM8 and KM1 '-KM 7' through a transmission line L1; the contactors KM10, KM14, KM10 ', KM14 ' are controlled to be switched on and off through a transmission line L4, and the contactors KM11-KM13, KM15, KM11 ' -KM13 ', KM15 ' are controlled to be switched off;
the PLC controls the measuring unit 2 to send out an instruction, and controls the direct current resistance measuring unit 4 to start measuring through a transmission line L3;
after the direct current resistance measuring unit 4 finishes measuring, the measured data are transmitted back to the PLC control measuring unit 2, are transmitted to the storage display unit 1 after data processing, are displayed and stored, and finish the measurement of the AB direct resistance of the winding;
measuring the direct resistance of a winding BC:
the PLC controls the measuring unit 2 to send out an instruction, and controls the disconnecting contactors KM1-KM8 and KM1 '-KM 7' through a transmission line L1; the contactors KM11, KM15, KM11 ', KM15 ' are controlled to be switched on and off through a transmission line L4, and the contactors KM12-KM13, KM10, KM12 ' -KM13 ', KM10 ' are controlled to be switched off;
the PLC controls the measuring unit 2 to send out an instruction, and controls the direct current resistance measuring unit 4 to start measuring through a transmission line L3;
after the direct current resistance measuring unit 4 finishes measuring, the measured data are transmitted back to the PLC control measuring unit 2, are transmitted to the storage display unit 1 after data processing, are displayed and stored, and finish the BC direct resistance measurement of the winding;
measuring the direct resistance of a winding CA:
the PLC controls the measuring unit 2 to send out an instruction, and controls the disconnecting contactors KM1-KM8 and KM1 '-KM 7' through a transmission line L1; the contactors KM12-KM13 and KM12 '-KM 13' are controlled to be switched on and off through a transmission line L4, and the contactors KM10-KM11, KM14-KM15, KM10 '-KM 11', KM14 '-KM 15' are controlled to be switched off;
the PLC controls the measuring unit 2 to send out an instruction, and controls the direct current resistance measuring unit 4 to start measuring through a transmission line L3;
after the direct current resistance measuring unit 4 finishes measuring, the measured data are transmitted back to the PLC control measuring unit 2, are transmitted to the storage display unit 1 after data processing, are displayed and stored, and finish the direct resistance measurement of the winding CA;
measuring the direct resistance of the winding an:
the PLC controls the measuring unit 2 to send out an instruction, and controls the disconnecting contactors KM9-KM15 and KM10 '-KM 15' through a transmission line L4; the contactors KM1, KM7, KM1 ', KM 7' are controlled to be switched on and off through a transmission line L1, and the contactors KM2-KM6, KM2 '-KM 6', KM8 are controlled to be switched off;
the PLC controls the measuring unit 2 to send out an instruction, and controls the direct current resistance measuring unit 4 to start measuring through a transmission line L3;
after the direct current resistance measuring unit 4 finishes measuring, the measured data are transmitted back to the PLC control measuring unit 2, are transmitted to the storage display unit 1 after data processing, are displayed and stored, and finish the measurement of the an direct resistance of the winding;
measuring the direct resistance around bn:
the PLC controls the measuring unit 2 to send out an instruction, and controls the disconnecting contactors KM9-KM15 and KM10 '-KM 15' through a transmission line L4; the contactors KM2, KM7, KM2 ', KM7 ' are controlled to be switched on and off through a transmission line L1, and the contactors KM3-KM6, KM1, KM3 ' -KM6 ', KM1 ' are controlled to be switched off;
the PLC controls the measuring unit 2 to send out an instruction, and controls the direct current resistance measuring unit 4 to start measuring through a transmission line L3;
after the direct current resistance measuring unit 4 finishes measuring, the measured data are transmitted back to the PLC control measuring unit 2, are transmitted to the storage display unit 1 after data processing, are displayed and stored, and finish the direct resistance measurement of the winding bn;
measuring the direct resistance around cn:
the PLC controls the measuring unit 2 to send out an instruction, and controls the disconnecting contactors KM9-KM15 and KM9 '-KM 15' through a transmission line L4; the contactors KM3, KM7, KM3 'and KM 7' are controlled to be switched on through a transmission line L1, and the contactors KM1-KM2 and KM4-KM6 are controlled to be switched off;
the PLC controls the measuring unit 2 to send out an instruction, and controls the direct current resistance measuring unit 4 to start measuring through a transmission line L3;
and after the direct current resistance measuring unit 4 finishes measuring, the measured data are transmitted back to the PLC control measuring unit 2, are transmitted to the storage display unit 1 after data processing, are displayed and stored, and the direct resistance measurement of the winding cn is finished.
The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (4)
1. An automatic switching transformation ratio direct resistance measuring device is characterized by comprising a storage display unit (1), a PLC control measuring unit (2), a transformation ratio measuring unit (3), a direct resistance measuring unit (4) and a measured transformer (5),
the storage display unit (1) is connected with the PLC control measuring unit (2) and used for displaying and storing measured data;
the PLC control measuring unit (2) is respectively connected with the transformation ratio measuring unit (3), the direct current resistance measuring unit (4), the low-voltage winding side contactor and the high-voltage winding side contactor through transmission lines;
the low-voltage winding side of the tested transformer (5) is connected to the low-voltage ports of the transformation ratio measuring unit (3) and the direct-current resistance measuring unit (4) through a low-voltage winding contactor, and the high-voltage winding side of the tested transformer (5) is connected to the high-voltage ports of the transformation ratio measuring unit (3) and the direct-current resistance measuring unit (4) through a high-voltage winding contactor.
2. An automatic switching transformation ratio direct resistance measurement device according to claim 1, characterized in that the direct current port 1I + of the direct current resistance measurement unit (4) is connected with the contactors KM1, KM2 and KM3 connected in parallel, the direct current port 1I-of the direct current resistance measurement unit (4) is connected with the contactors KM4, KM5, KM6 and KM7 connected in parallel, the direct current port 2I + of the direct current resistance measurement unit (4) is connected with the contactors KM10, KM11 and KM12 connected in parallel, the direct current port 2I-of the direct current resistance measurement unit (4) is connected with the contactors KM13, KM14 and KM15 connected in parallel, the direct current voltage port 1U + of the direct current resistance measurement unit (4) is connected with the contactors KM1 ', KM 2' and KM3 'connected in parallel, the direct current voltage port 1U-of the direct current resistance measurement unit (4) is connected with the contactors KM 4' connected in parallel, KM5 ', KM 6' and KM7 ', wherein a direct current voltage port 2U + of the direct current resistance measuring unit (4) is connected with contactors KM 10', KM11 'and KM12 which are connected in parallel, a direct current port 2U-of the direct current resistance measuring unit (4) is connected with contactors KM 13', KM14 'and KM 15' which are connected in parallel, a low voltage port of the transformation ratio measuring unit (3) is connected with a contactor KM8, and a high voltage port of the transformation ratio measuring unit (3) is connected with a contactor KM 9.
3. An automatic switching transformation ratio direct resistance measurement method is characterized by comprising transformation ratio measurement and direct resistance measurement, and comprises the following specific steps:
adjusting the gear of the transformer to 1;
starting voltage ratio measurement, the PLC controls the measurement unit (2) to send a command, controls the contactor KM8 to be switched on through a transmission line L1, and controls the contactors KM1-KM7 and KM1 '-KM 7' to be switched off; the contactor KM9 is controlled to be switched on through a transmission line L4, and the contactors KM10-KM15, KM10 '-KM 15' are controlled to be switched off;
the PLC controls the measuring unit (2) to send out an instruction, and controls the transformation ratio measuring unit (3) to start measuring through a transmission line L2;
after the measurement is completed by the transformation ratio measuring unit, the measured data is transmitted back to the PLC control measuring unit, is transmitted to the storage display unit after data processing, is displayed and stored, and then transformation ratio measurement is completed;
the PLC controls the measuring unit (2) to send out an instruction, and controls the direct current resistance measuring unit (4) to start direct current resistance measurement through a transmission line L3;
adjusting the gear of the transformer to 2;
repeating the steps to complete the transformation ratio measurement and the direct current resistance measurement;
and adjusting the gears of the transformer repeatedly until all the gears are finished.
4. An automatic switching transformation ratio direct resistance measurement method is characterized by comprising the following specific steps:
and (3) measuring the direct resistance of the winding AB:
the PLC controls the measuring unit (2) to send out an instruction, and controls the disconnecting contactors KM1-KM8 and KM1 '-KM 7' through a transmission line L1; the contactors KM10, KM14, KM10 ', KM14 ' are controlled to be switched on and off through a transmission line L4, and the contactors KM11-KM13, KM15, KM11 ' -KM13 ', KM15 ' are controlled to be switched off;
the PLC controls the measuring unit (2) to send out an instruction, and controls the direct current resistance measuring unit (4) to start measuring through a transmission line L3;
after the direct current resistance measuring unit (4) finishes measurement, returning measurement data to the PLC control measuring unit (2), transmitting the measurement data to the storage display unit (1) after data processing, displaying the measurement data and storing the data, and finishing the direct resistance measurement of the winding AB;
measuring the direct resistance of a winding BC:
the PLC controls the measuring unit (2) to send out an instruction, and controls the disconnecting contactors KM1-KM8 and KM1 '-KM 7' through a transmission line L1; the contactors KM11, KM15, KM11 ', KM15 ' are controlled to be switched on and off through a transmission line L4, and the contactors KM12-KM13, KM10, KM12 ' -KM13 ', KM10 ' are controlled to be switched off;
the PLC controls the measuring unit (2) to send out an instruction, and controls the direct current resistance measuring unit (4) to start measuring through a transmission line L3;
after the direct current resistance measurement unit (4) finishes measurement, the measurement data are transmitted back to the PLC control measurement unit (2), are transmitted to the storage display unit (1) after data processing, are displayed and stored, and the winding BC direct resistance measurement is finished;
measuring the direct resistance of a winding CA:
the PLC controls the measuring unit (2) to send out an instruction, and controls the disconnecting contactors KM1-KM8 and KM1 '-KM 7' through a transmission line L1; the contactors KM12-KM13 and KM12 '-KM 13' are controlled to be switched on and off through a transmission line L4, and the contactors KM10-KM11, KM14-KM15, KM10 '-KM 11', KM14 '-KM 15' are controlled to be switched off;
the PLC controls the measuring unit (2) to send out an instruction, and controls the direct current resistance measuring unit (4) to start measuring through a transmission line L3;
after the direct current resistance measuring unit (4) finishes measuring, the measured data are transmitted back to the PLC control measuring unit (2), are transmitted to the storage display unit (1) after data processing, are displayed and stored, and finish the winding CA direct resistance measurement;
measuring the direct resistance of the winding an:
the PLC controls the measuring unit (2) to send out an instruction, and controls the disconnecting contactors KM9-KM15 and KM10 '-KM 15' through a transmission line L4; the contactors KM1, KM7, KM1 ', KM 7' are controlled to be switched on and off through a transmission line L1, and the contactors KM2-KM6, KM2 '-KM 6', KM8 are controlled to be switched off;
the PLC controls the measuring unit (2) to send out an instruction, and controls the direct current resistance measuring unit (4) to start measuring through a transmission line L3;
after the direct current resistance measuring unit (4) finishes measurement, returning measurement data to the PLC control measuring unit (2), transmitting the measurement data to the storage display unit (1) after data processing, displaying the measurement data and storing the data to finish the an direct resistance measurement of the winding;
measuring the direct resistance around bn:
the PLC controls the measuring unit (2) to send out an instruction, and controls the disconnecting contactors KM9-KM15 and KM10 '-KM 15' through a transmission line L4; the contactors KM2, KM7, KM2 ', KM7 ' are controlled to be switched on and off through a transmission line L1, and the contactors KM3-KM6, KM1, KM3 ' -KM6 ', KM1 ' are controlled to be switched off;
the PLC controls the measuring unit (2) to send out an instruction, and controls the direct current resistance measuring unit (4) to start measuring through a transmission line L3;
after the direct-current resistance measuring unit (4) finishes measuring, returning the measured data to the PLC control measuring unit (2), transmitting the data to the storage display unit (1) after data processing, displaying the measured data and storing the data, and finishing direct resistance measurement of the winding bn;
measuring the direct resistance around cn:
the PLC controls the measuring unit (2) to send out an instruction, and controls the disconnecting contactors KM9-KM15 and KM9 '-KM 15' through a transmission line L4; the contactors KM3, KM7, KM3 ', KM 7' are controlled to be switched on and off through a transmission line L1, and the contactors KM1-KM2 and KM4-KM6 are controlled to be switched off;
the PLC controls the measuring unit (2) to send out an instruction, and controls the direct current resistance measuring unit (4) to start measuring through a transmission line L3;
after the direct-current resistance measuring unit (4) finishes measuring, the measured data are transmitted back to the PLC control measuring unit (2), are transmitted to the storage display unit (1) after data processing, are displayed and stored, and the direct resistance measurement of the winding cn is finished.
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| CN202210037604.8A CN114487929A (en) | 2022-01-13 | 2022-01-13 | Automatic switching ratio-variable direct resistance measuring device and method |
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| CN202210037604.8A CN114487929A (en) | 2022-01-13 | 2022-01-13 | Automatic switching ratio-variable direct resistance measuring device and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114814438A (en) * | 2022-05-25 | 2022-07-29 | 国网湖北省电力有限公司鄂州供电公司 | Intelligent detection method for energy efficiency of distribution transformer |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104833828A (en) * | 2015-05-14 | 2015-08-12 | 明晓军 | Transformer test station one-time wiring apparatus |
| CN207215903U (en) * | 2016-11-15 | 2018-04-10 | 保定市力兴电子设备有限公司 | A kind of DCR of Transformer and transformer voltage ratio group tester |
| CN111679144A (en) * | 2020-06-23 | 2020-09-18 | 湖北新石电力科技有限公司 | Integrated intelligent comprehensive test system for transformer |
-
2022
- 2022-01-13 CN CN202210037604.8A patent/CN114487929A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104833828A (en) * | 2015-05-14 | 2015-08-12 | 明晓军 | Transformer test station one-time wiring apparatus |
| CN207215903U (en) * | 2016-11-15 | 2018-04-10 | 保定市力兴电子设备有限公司 | A kind of DCR of Transformer and transformer voltage ratio group tester |
| CN111679144A (en) * | 2020-06-23 | 2020-09-18 | 湖北新石电力科技有限公司 | Integrated intelligent comprehensive test system for transformer |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114814438A (en) * | 2022-05-25 | 2022-07-29 | 国网湖北省电力有限公司鄂州供电公司 | Intelligent detection method for energy efficiency of distribution transformer |
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