CN113447856A - Automatic quality inspection testing device and method for transformer - Google Patents
Automatic quality inspection testing device and method for transformer Download PDFInfo
- Publication number
- CN113447856A CN113447856A CN202110712211.8A CN202110712211A CN113447856A CN 113447856 A CN113447856 A CN 113447856A CN 202110712211 A CN202110712211 A CN 202110712211A CN 113447856 A CN113447856 A CN 113447856A
- Authority
- CN
- China
- Prior art keywords
- voltage
- measurement
- test
- phase winding
- transformer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 139
- 238000007689 inspection Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000005259 measurement Methods 0.000 claims abstract description 188
- 238000004804 winding Methods 0.000 claims abstract description 119
- 238000001514 detection method Methods 0.000 claims abstract description 17
- 238000010998 test method Methods 0.000 claims abstract description 6
- 238000010521 absorption reaction Methods 0.000 claims description 23
- 238000009413 insulation Methods 0.000 claims description 23
- 238000012795 verification Methods 0.000 claims description 22
- 230000003993 interaction Effects 0.000 claims description 21
- 230000006698 induction Effects 0.000 claims description 19
- 238000010079 rubber tapping Methods 0.000 claims description 15
- 238000006243 chemical reaction Methods 0.000 claims description 11
- 239000000725 suspension Substances 0.000 claims description 10
- 230000005611 electricity Effects 0.000 claims description 8
- 238000010586 diagram Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 206010048669 Terminal state Diseases 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
Images
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention relates to the technical field of transformer performance quality detection tests, in particular to an automatic quality detection test device and a test method for a transformer, wherein the automatic quality detection test device comprises a high-voltage switching unit, a low-voltage switching unit, a digital measurement main control unit, a power supply unit and an upper computer; the upper computer is used for selecting test items and outputting corresponding test instructions; and the data measurement main control unit receives the test instruction and switches the power supply mode of the power supply unit according to the test instruction. The invention has reasonable and compact structure and convenient use, selects the items to be tested through the upper computer, the digital measurement main control unit selects the corresponding power supply mode of the power supply unit and switches the states of the three-phase winding terminals of the tested transformer according to the instruction of the upper computer, the automatic quality inspection test of the tested transformer is completed, the test can be completed only by selecting the corresponding test items through the upper computer, the operation is simple, and the frequent wiring, wire changing and wire reversing operations are not required in the test process.
Description
Technical Field
The invention relates to the technical field of transformer performance quality detection tests, in particular to an automatic quality detection test device and a test method for a transformer.
Background
The transformer is an important link in an electric power system, the running condition of the transformer directly influences the reliable and economic running of the electric power system, according to the material quality supervision and management method of the national grid company, in order to deeply implement the strategy of 'quality strong state', the quality of equipment is strictly connected into the network, the efficiency benefit of material to goods sampling inspection is improved, an insulation resistance and absorption ratio measuring module, a direct current resistance measuring module, a voltage ratio measuring and connecting group label verifying module, a no-load loss and no-load current measuring module, a short-circuit impedance and load loss measuring module, an induction voltage resistance, an external voltage resistance, a dielectric loss factor and a capacitance measuring module are developed for the transformer, most of performance quality defects of the transformer can be timely found, and the transformer is a test item which needs to be detected in the C-level detection test capability of the transformer.
At present, a plurality of detection instruments are required to detect the transformer for carrying out a material quality sampling detection test in turn, and due to the fact that each detection item needs different wiring methods, frequent wiring, wire changing and wire reversing operations are required in the sampling detection test process, time and labor are wasted, and wiring errors and poor contact are easy to occur in the operation, so that the test data have measurement errors, the study and judgment of test results are seriously influenced, and the test quality of transformer performance detection is reduced.
Disclosure of Invention
The invention provides an automatic quality inspection testing device and an automatic quality inspection testing method for a transformer, overcomes the defects of the prior art, and can effectively solve the problems that the existing automatic quality inspection testing device for the transformer is complex in wiring and easy to cause wiring errors when different wiring methods are used for detecting different projects.
One of the technical schemes of the invention is realized by the following measures: an automatic quality inspection test device for a transformer comprises a high-voltage switching unit, a low-voltage switching unit, a digital measurement main control unit, a power supply unit and an upper computer;
the upper computer is used for selecting test items and outputting corresponding test instructions;
the data measurement main control unit receives the test instruction, switches the power supply mode of the power supply unit according to the test instruction, and controls the high-voltage switching unit and the low-voltage switching unit to switch states according to the test instruction;
the high-voltage switching unit is used for switching the states of the high-voltage side three-phase winding terminal of the tested transformer, wherein the states of the high-voltage side three-phase winding terminal comprise a suspension state, a short-circuit state and a grounding state;
the low-voltage switching unit is used for switching the states of the low-voltage side three-phase winding terminal of the tested transformer, wherein the states of the low-voltage side three-phase winding terminal comprise a suspension state, a short-circuit state and a grounding state;
the power supply unit is used for supplying power to the tested transformer.
The following is a further optimization or/and improvement of one of the above-mentioned technical solutions of the invention:
the power supply unit can comprise a direct current high-voltage module, an alternating current high-voltage module, a direct current constant-current module and an alternating current frequency conversion module; the direct-current high-voltage module provides direct-current high-voltage electricity; the alternating current high voltage module provides alternating current high voltage electricity; the direct current constant current module provides direct current constant current; the alternating current frequency conversion module provides alternating current.
The upper computer can comprise a human-computer interaction unit, a function selection unit and a function execution unit; the man-machine interaction unit is used for operating the function selection unit; the function selection unit is used for selecting different function modules according to needs, wherein the function modules comprise an insulation resistance and absorption ratio measurement function module, a direct current resistance measurement function module, a voltage ratio measurement and connection group label verification function module, a no-load loss and no-load current measurement function module, a short-circuit impedance and load loss measurement function module, an induction withstand voltage test function module, an external withstand voltage test function module and a dielectric loss factor and capacitance measurement function module.
The function execution unit can comprise an insulation resistance and absorption ratio measurement execution module, a direct current resistance measurement execution module, a voltage ratio measurement and connection group label verification execution module, a no-load loss and no-load current measurement execution module, a short-circuit impedance and load loss measurement execution module, an induction withstand voltage test execution module, an external withstand voltage test execution module and a dielectric loss factor and capacitance measurement execution module;
the insulation resistance and absorption ratio measurement execution module executes the measurement of the insulation resistance and absorption ratio between the high-voltage side three-phase winding and the low-voltage side three-phase winding of the tested transformer and the shell of the tested transformer;
the direct-current resistance measurement execution module executes direct-current resistance measurement of the high-voltage side three-phase winding and the low-voltage side three-phase winding at all tapping positions of the tapping switch of the tested transformer;
the voltage ratio measurement and connection group label verification execution module executes voltage ratio measurement and connection group label verification of all tapping positions of the tapping switch;
the no-load loss and no-load current measurement execution module executes no-load loss and no-load current measurement of the tested transformer;
the short-circuit impedance and load loss measurement execution module executes short-circuit impedance and load loss measurement of the high voltage to the three-phase winding at the low voltage side of the tested transformer;
the induction voltage-withstand test execution module executes an induction voltage-withstand test of the tested transformer;
the external voltage withstand test execution module executes an external voltage withstand test between the high-voltage side three-phase winding and the low-voltage side three-phase winding of the tested transformer and the shell of the tested transformer;
the dielectric loss factor and capacitance measurement execution module executes the dielectric loss factor and capacitance measurement, wherein the dielectric loss factor and capacitance measurement comprises the following steps: 1. measuring the dielectric loss factor and capacitance between the high-voltage side three-phase winding of the tested transformer and the shell of the tested transformer; 2. measuring the dielectric loss factor and capacitance between the three-phase winding at the low-voltage side of the tested transformer and the shell of the tested transformer; 3. and measuring the dielectric loss factor and the capacitance between the high-voltage side three-phase winding and the low-voltage side three-phase winding of the tested transformer and the shell of the tested transformer.
The second technical scheme of the invention is realized by the following measures: an automatic quality inspection test method for a transformer comprises the following steps:
the upper computer selects a test item and outputs a corresponding test instruction;
the digital measurement main control unit receives a test instruction;
the data measurement main control unit switches power supply modes of the power supply unit according to the test instruction, wherein the power supply modes of the power supply unit comprise a direct current high-voltage power supply mode, an alternating current high-voltage power supply mode, a direct current constant-current power supply mode and an alternating current variable-frequency power supply mode;
and the digital measurement main control unit controls the high-voltage switching unit and the low-voltage switching unit to respectively switch the states of the high-voltage side three-phase winding terminal and the low-voltage side three-phase winding terminal of the measured transformer according to the test instruction, wherein the states of the high-voltage side three-phase winding terminal and the low-voltage side three-phase winding terminal comprise a suspension state, a short-circuit state and a grounding state.
The high-voltage switching unit and the low-voltage switching unit transmit test data of the transformer back to the upper computer for storage and display through the data measurement main control unit.
The following is further optimization or/and improvement of the second technical scheme of the invention:
the above-mentioned host computer carries out the test item selection, can include:
the man-machine interaction unit selects one or more detection items;
the function selection unit outputs an instruction to the corresponding function execution unit according to the selection of the human-computer interaction unit;
the function execution unit executes the corresponding instruction and outputs the corresponding instruction to the data measurement main control unit; the function execution unit executes output instructions including insulation resistance and absorption ratio measurement instructions, direct current resistance measurement instructions, voltage ratio measurement and connection group label verification instructions, no-load loss and no-load current measurement instructions, short-circuit impedance and load loss measurement instructions, induction voltage-withstand test instructions, external voltage-withstand test instructions and dielectric loss factor and capacitance measurement instructions.
The device is connected with the tested transformer, the upper computer selects items to be tested, the digital testing main control unit selects a power supply mode corresponding to the power supply unit and switches the states of three-phase winding terminals of the tested transformer according to instructions of the upper computer, the automatic quality inspection test of the tested transformer is completed, the test can be completed only by selecting the corresponding test items through the upper computer, the operation is simple, and frequent wiring, wire changing and wire reversing operations are not needed in the test process, so that the problems that the test data have measurement errors and the study and judgment of the test result are influenced due to wiring errors are solved, and the test quality of the performance test of the tested transformer is improved.
Drawings
Fig. 1 is a schematic circuit structure diagram according to a first embodiment of the present invention.
Fig. 2 is a schematic circuit diagram of the power supply unit shown in fig. 1.
Fig. 3 is a schematic circuit diagram of the function execution unit shown in fig. 1.
FIG. 4 is a schematic diagram of a method according to a second embodiment of the present invention.
FIG. 5 is a schematic diagram of a method for selecting a test project by the upper computer in FIG. 4.
Detailed Description
The present invention is not limited by the following examples, and specific embodiments may be determined according to the technical solutions and practical situations of the present invention.
The invention is further described with reference to the following examples and figures:
the first embodiment is as follows: as shown in attached figure 1, the transformer automatic quality inspection testing device comprises a high-voltage switching unit, a low-voltage switching unit, a digital measurement main control unit, a power supply unit and an upper computer,
the upper computer is used for selecting test items and outputting corresponding test instructions;
the data measurement main control unit receives the test instruction, switches the power supply mode of the power supply unit according to the test instruction, and controls the high-voltage switching unit and the low-voltage switching unit to switch states according to the test instruction;
the high-voltage switching unit is used for switching the states of the high-voltage side three-phase winding terminal of the tested transformer, wherein the states of the high-voltage side three-phase winding terminal comprise a suspension state, a short-circuit state and a grounding state;
the low-voltage switching unit is used for switching the states of the low-voltage side three-phase winding terminal of the tested transformer, wherein the states of the low-voltage side three-phase winding terminal comprise a suspension state, a short-circuit state and a grounding state;
the power supply unit is used for supplying power to the tested transformer.
The upper computer is used for selecting the detection items, receiving the test data of each detection item, displaying and storing the test data, and generating a test report, so that the later-stage test data can be conveniently inquired and maintained; the power supply unit is used for supplying power to the tested transformer; the digital measurement main control unit is used for receiving an instruction output by the upper computer, switching a power supply mode of the power supply unit according to the received instruction, and controlling the high-voltage switching unit and the low-voltage switching unit to switch the state of a three-phase winding terminal of the measured transformer, wherein the power supply mode of the power supply unit comprises a direct-current high-voltage power supply mode, an alternating-current high-voltage power supply mode, a direct-current constant-current power supply mode and an alternating-current variable-frequency power supply mode; the terminal states of the three-phase winding of the tested transformer comprise a suspension state, a short-circuit state and a grounding state.
During testing, the high-voltage switching unit is connected with a three-phase winding at the high-voltage side of a tested transformer, the low-voltage switching unit is connected with a three-phase winding at the low-voltage side of the tested transformer, an upper computer outputs an instruction to the data measurement main control unit, the data measurement main control unit switches the power supply mode of the power supply unit according to the received instruction, meanwhile, the data measurement main control unit controls the high-voltage switching unit to switch the state of a three-phase winding terminal at the high-voltage side of the tested transformer according to the received instruction and controls the low-voltage switching unit to switch the state of the three-phase winding terminal at the low-voltage side of the tested transformer so as to obtain test data of the tested transformer corresponding to the instruction, the test data of the tested transformer is transmitted back to the data measurement main control unit through the high-voltage switching unit and the low-voltage switching unit, and the upper computer collects the test data of the tested transformer and calculates, analyzes and stores the test data, thus, the automatic quality inspection test of the tested transformer is completed.
In summary, the device is reasonable and compact in structure and convenient to use, items needing to be tested are selected by the upper computer through connecting the device with the tested transformer, the digital testing main control unit selects a power supply mode corresponding to the power supply unit according to instructions of the upper computer and switches the states of three-phase winding terminals of the tested transformer, the automatic quality inspection test of the tested transformer is completed, the test can be completed only by selecting the corresponding test items by the upper computer, the operation is simple, and frequent wiring, wire changing and wire reversing operations are not needed in the test process, so that the problems that the test data caused by wiring errors have measurement errors and the study and judgment of test results are influenced are solved, and the test quality of performance detection of the tested transformer is improved.
The transformer automatic quality inspection testing device can be further optimized or/and improved according to actual needs:
as shown in fig. 2, the power supply unit includes a dc high voltage module, an ac high voltage module, a dc constant current module and an ac frequency conversion module; the direct-current high-voltage module provides direct-current high-voltage electricity; the alternating current high voltage module provides alternating current high voltage electricity; the direct current constant current module provides direct current constant current; the alternating current frequency conversion module provides alternating current.
The direct-current high-voltage module can be a known direct-current high-voltage power supply and is used for providing direct-current high-voltage electricity for the tested transformer; the alternating current high voltage module can be an existing known alternating current high voltage power supply and is used for providing alternating current high voltage electricity for the tested transformer; the direct current constant current module can be a known direct current constant current power supply and is used for providing direct current constant current power for the tested transformer; the alternating current frequency conversion module can be an existing known alternating current frequency conversion power supply and is used for providing alternating current for the tested transformer.
As shown in fig. 1, the upper computer comprises a human-computer interaction unit, a function selection unit and a function execution unit; the man-machine interaction unit is used for operating the function selection unit; the function selection unit is used for selecting different function modules according to needs, wherein the function modules comprise an insulation resistance and absorption ratio measurement function module, a direct current resistance measurement function module, a voltage ratio measurement and connection group label verification function module, a no-load loss and no-load current measurement function module, a short-circuit impedance and load loss measurement function module, an induction withstand voltage test function module, an external withstand voltage test function module and a dielectric loss factor and capacitance measurement function module.
The human-computer interaction unit is used for operating the function selection unit; the function selection unit can comprise an insulation resistance and absorption ratio measurement function module, a direct current resistance measurement function module, a voltage ratio measurement and connection group label verification function module, a no-load loss and no-load current measurement function module, a short-circuit impedance and load loss measurement function module, an induction withstand voltage test function module, an external withstand voltage test function module and a dielectric loss factor and capacitance measurement function module, and is used for selecting different function modules according to needs, so that the measurement of the tested transformer is facilitated.
As shown in fig. 3, the function execution unit includes an insulation resistance and absorption ratio measurement execution module, a dc resistance measurement execution module, a voltage ratio measurement and connection group label verification execution module, a no-load loss and no-load current measurement execution module, a short-circuit impedance and load loss measurement execution module, an induced voltage withstand test execution module, an external voltage withstand test execution module, and a dielectric loss factor and capacitance measurement execution module;
the insulation resistance and absorption ratio measurement execution module executes the measurement of the insulation resistance and absorption ratio between the high-voltage side three-phase winding and the low-voltage side three-phase winding of the tested transformer and the shell of the tested transformer;
the direct-current resistance measurement execution module executes direct-current resistance measurement of the high-voltage side three-phase winding and the low-voltage side three-phase winding at all tapping positions of the tapping switch of the tested transformer;
the voltage ratio measurement and connection group label verification execution module executes voltage ratio measurement and connection group label verification of all tapping positions of the tapping switch;
the no-load loss and no-load current measurement execution module executes no-load loss and no-load current measurement of the tested transformer;
the short-circuit impedance and load loss measurement execution module executes short-circuit impedance and load loss measurement of the high voltage to the three-phase winding at the low voltage side of the tested transformer;
the induction voltage-withstand test execution module executes an induction voltage-withstand test of the tested transformer;
the external voltage withstand test execution module executes an external voltage withstand test between the high-voltage side three-phase winding and the low-voltage side three-phase winding of the tested transformer and the shell of the tested transformer;
the dielectric loss factor and capacitance measurement execution module executes: 1. measuring the dielectric loss factor and capacitance between the high-voltage side three-phase winding of the tested transformer and the shell of the tested transformer; 2. measuring the dielectric loss factor and capacitance between the three-phase winding at the low-voltage side of the tested transformer and the shell of the tested transformer; 3. and measuring the dielectric loss factor and the capacitance between the high-voltage side three-phase winding and the low-voltage side three-phase winding of the tested transformer and the shell of the tested transformer.
During operation, the automatic quality inspection test of the tested transformer is mainly completed through the following eight test items, and the method specifically comprises the following steps:
1. if the staff selects the insulation resistance and absorption ratio measurement function module in the function selection unit through the man-machine interaction unit, the insulation resistance and absorption ratio measurement execution module in the function execution unit executes the instruction of the insulation resistance and absorption ratio measurement function and outputs the instruction to the data measurement main control unit, and the method comprises the following steps:
a. the digital measurement main control unit controls the direct-current high-voltage module to pressurize the high-voltage side three-phase winding of the measured transformer and controls the high-voltage switching unit to switch the high-voltage side three-phase winding terminal to a short-circuit state; the digital measurement main control unit controls the low-voltage switching unit to switch the low-voltage side three-phase winding terminal to a short circuit and grounding state; the digital measurement main control unit measures the insulation resistance and the absorption ratio of the high-voltage side winding of the measured transformer to the low-voltage side winding and the outer shell through the high-voltage switching unit and the low-voltage switching unit;
b. the digital measurement main control unit controls the direct-current high-voltage module to pressurize the low-voltage side three-phase winding of the measured transformer, and controls the low-voltage switching unit to switch the low-voltage side three-phase winding terminal to a short-circuit state; the digital measurement main control unit controls the high-voltage switching unit to switch the high-voltage side three-phase winding terminal to a short circuit and grounding state; the digital measurement main control unit measures the insulation resistance and the absorption ratio of the low-voltage side winding of the measured transformer to the high-voltage side winding and the shell through the high-voltage switching unit and the low-voltage switching unit;
c. the digital measurement main control unit controls the direct-current high-voltage module to respectively pressurize the high-voltage side three-phase winding and the low-voltage side three-phase winding of the measured transformer, controls the high-voltage switching unit to switch the high-voltage side three-phase winding terminal of the measured transformer to a short-circuit state, and controls the low-voltage switching unit to switch the low-voltage side three-phase winding terminal of the measured transformer to a short-circuit state; the digital measurement main control unit measures the insulation resistance and the absorption ratio of windings on the high-voltage side and the low-voltage side of the tested transformer to the shell through the high-voltage switching unit and the low-voltage switching unit;
2. if the staff selects the function of the external pressure resistance test functional module in the function selection unit through the man-machine interaction unit, the external pressure resistance execution module in the function execution unit executes the instruction of the external pressure resistance test functional module and outputs the instruction to the data measurement main control unit, and the method comprises the following steps:
a. the digital measurement main control unit controls the alternating-current high-voltage module to pressurize the high-voltage side three-phase winding of the measured transformer to a preset voltage and controls the high-voltage switching unit to switch the high-voltage side three-phase winding terminal to a short-circuit state; the digital measurement main control unit controls the low-voltage switching unit to switch the low-voltage side three-phase winding terminal to a short circuit and grounding state; the digital measurement main control unit measures the external withstand voltage of the high-voltage side winding of the tested transformer to the low-voltage side winding and the outer shell through the high-voltage switching unit and the low-voltage switching unit;
b. the digital measurement main control unit controls the alternating-current high-voltage module to pressurize the low-voltage side three-phase winding of the measured transformer to a preset voltage and controls the low-voltage switching unit to switch the low-voltage side three-phase winding terminal to a short-circuit state; the digital measurement main control unit controls the high-voltage switching unit to switch the high-voltage side three-phase winding terminal to a short circuit and grounding state; the digital measurement main control unit measures the external withstand voltage of the low-voltage side winding of the tested transformer to the high-voltage side winding and the outer shell through the high-voltage switching unit and the low-voltage switching unit;
3. if the staff selects the dielectric loss factor and capacitance measurement function module in the function selection unit through the man-machine interaction unit, the dielectric loss factor and capacitance measurement execution module in the function execution unit executes the instruction of the dielectric loss factor and capacitance measurement function module and outputs the instruction to the data measurement main control unit, and the method comprises the following steps:
a. the digital measurement main control unit controls the alternating-current high-voltage module to pressurize the high-voltage side three-phase winding of the measured transformer and controls the high-voltage switching unit to switch the high-voltage side three-phase winding terminal to a short-circuit state; the digital measurement main control unit controls the low-voltage switching unit to switch the low-voltage side three-phase winding terminal to a short circuit and grounding state; the digital measurement main control unit measures the dielectric loss factor and the capacitance of the high-voltage side winding of the measured transformer to the low-voltage side winding and the outer shell through the high-voltage switching unit and the low-voltage switching unit;
b. the digital measurement main control unit controls the alternating-current high-voltage module to pressurize the three-phase winding at the low-voltage side of the measured transformer and controls the low-voltage switching unit to switch the three-phase winding terminal at the low-voltage side to a short-circuit state; the digital measurement main control unit controls the high-voltage switching unit to switch the high-voltage side three-phase winding terminal to a short circuit and grounding state; the digital measurement main control unit measures the dielectric loss factor and the capacitance of the high-voltage side winding and the shell of the low-voltage side winding of the measured transformer through the high-voltage switching unit and the low-voltage switching unit;
4. if the direct current resistance measurement function module in the function selection unit is selected by the staff through the man-machine interaction unit, the direct current resistance measurement execution module in the function execution unit executes the instruction of the direct current resistance measurement function module and outputs the instruction to the data measurement main control unit, and the method comprises the following steps:
a. when measuring the direct current resistance of the three-phase winding at the high-voltage side of the tested transformer, the digital testing main control unit controls the direct current constant current module to pressurize the three-phase winding at the high-voltage side of the tested transformer; the digital measurement main control unit controls the low-voltage switching unit to switch the low-voltage side three-phase winding terminal to a suspended state, adjusts the position of a tap switch (a tap switch carried by a measured transformer), measures the direct current resistance of the current tap position, and switches the tap switch in sequence to complete the measurement of the direct current resistance of the high-voltage side winding at all the tap positions;
b. when measuring the direct current resistance of the three-phase winding at the low-voltage side of the tested transformer, the digital testing main control unit controls the direct current constant current module to pressurize the three-phase winding at the low-voltage side of the tested transformer; the digital measurement main control unit controls the high-voltage switching unit to switch the high-voltage side three-phase winding to a suspended state; adjusting the position of a tapping switch, measuring the direct current resistance of the current tapping position, and sequentially switching to complete the measurement of the direct current resistance of the low-voltage side winding at all tapping positions;
5. if the worker selects the voltage ratio measurement and connection group label verification functional module in the function selection unit through the man-machine interaction unit, the voltage ratio measurement and connection group label verification execution module in the function execution unit executes the instruction of the voltage ratio measurement and connection group label verification functional module and outputs the instruction to the data measurement main control unit, the data measurement main control unit controls the alternating current frequency conversion module to pressurize the high-voltage side three-phase winding and the low-voltage side three-phase winding of the tested transformer respectively, the position of the tap switch is adjusted, the voltage ratio measurement and connection group label verification of the current tap position are measured, and the voltage ratio measurement and connection group label verification of all tap positions are sequentially switched to be carried out, so that the voltage ratio measurement and connection group label verification of all tap positions are completed;
6. if the worker selects the induction voltage withstand test functional module in the function selection unit through the man-machine interaction unit, the induction voltage withstand test execution module in the function execution unit executes an instruction of the induction voltage withstand test functional module and outputs the instruction to the data main control unit, and the data main control unit controls the alternating current frequency conversion module to pressurize the three-phase winding on the low-voltage side of the tested transformer; the digital measurement main control unit controls the high-voltage switching unit to switch the high-voltage side three-phase winding terminal of the tested transformer to a suspended state, and measures the induced withstand voltage of the tested transformer through the high-voltage switching unit and the low-voltage switching unit;
7. if the staff selects the no-load loss and no-load current measurement function module in the function selection unit through the man-machine interaction unit, the no-load loss and no-load current measurement execution module in the function execution unit executes the instruction of the no-load loss and no-load current measurement function module and outputs the instruction to the digital measurement main control unit, and the digital measurement main control unit controls the alternating current frequency conversion module to pressurize the three-phase winding on the low-voltage side of the tested transformer to a preset voltage; the digital measurement main control unit controls the high-voltage switching unit to switch the high-voltage side three-phase winding terminal of the tested transformer to a suspended state, and measures the no-load loss and the no-load current of the tested transformer through the high-voltage switching unit and the low-voltage switching unit;
8. if the short-circuit impedance and load loss measurement function module in the function selection unit is selected by a worker through the man-machine interaction unit, the short-circuit impedance and load loss measurement execution module in the function execution unit executes an instruction of the short-circuit impedance and load loss measurement function module and outputs the instruction to the digital measurement main control unit, and the digital measurement main control unit controls the alternating current frequency conversion module to pressurize the three-phase winding on the high-voltage side of the tested transformer to a preset voltage; the digital measurement main control unit controls the low-voltage switching unit to switch the low-voltage side three-phase winding terminal of the measured transformer to a short-circuit state, and measures the short-circuit impedance and the load loss of the measured transformer through the high-voltage switching unit and the low-voltage switching unit.
Example two: as shown in fig. 4, the method for automated quality inspection testing of a transformer includes:
s101, selecting test items by an upper computer and outputting corresponding test instructions;
s102, the data testing main control unit receives a testing instruction;
s103, switching power supply modes of a power supply unit by the data measurement main control unit according to a test instruction, wherein the power supply modes of the power supply unit comprise a direct current high-voltage power supply mode, an alternating current high-voltage power supply mode, a direct current constant-current power supply mode and an alternating current variable-frequency power supply mode;
s104, the digital measurement main control unit controls the high-voltage switching unit and the low-voltage switching unit to respectively switch the states of a high-voltage side three-phase winding terminal and a low-voltage side three-phase winding terminal of the measured transformer according to a test instruction, wherein the states of the high-voltage side three-phase winding terminal and the low-voltage side three-phase winding terminal comprise a suspension state, a short-circuit state and a grounding state; the specific process of controlling the high-voltage switching unit and the low-voltage switching unit to respectively switch the states of the high-voltage side three-phase winding terminal and the low-voltage side three-phase winding terminal of the tested transformer by the digital measurement main control unit according to the test instruction is described in detail in the first embodiment, and is not described again here;
and S105, the high-voltage switching unit and the low-voltage switching unit transmit the test data of the transformer back to the upper computer for storage and display through the data measurement main control unit.
The transformer automatic quality inspection test method can be further optimized or/and improved according to actual needs:
as shown in fig. 5, the upper computer performs test item selection, including:
s201, selecting one or more detection items by a man-machine interaction unit;
s202, the function selection unit outputs an instruction to a corresponding function execution unit according to the selection of the man-machine interaction unit;
s203, the function execution unit executes the corresponding instruction and outputs the corresponding instruction to the data measurement main control unit; the function execution unit executes output instructions including insulation resistance and absorption ratio measurement instructions, direct current resistance measurement instructions, voltage ratio measurement and connection group label verification instructions, no-load loss and no-load current measurement instructions, short-circuit impedance and load loss measurement instructions, induction voltage-withstand test instructions, external voltage-withstand test instructions and dielectric loss factor and capacitance measurement instructions.
The technical characteristics form an embodiment of the invention, which has strong adaptability and implementation effect, and unnecessary technical characteristics can be increased or decreased according to actual needs to meet the requirements of different situations.
Claims (6)
1. An automatic quality inspection test device for a transformer is characterized by comprising a high-voltage switching unit, a low-voltage switching unit, a digital measurement main control unit, a power supply unit and an upper computer;
the upper computer is used for selecting test items and outputting corresponding test instructions;
the data measurement main control unit receives the test instruction, switches the power supply mode of the power supply unit according to the test instruction, and controls the high-voltage switching unit and the low-voltage switching unit to switch states according to the test instruction;
the high-voltage switching unit is used for switching the states of the high-voltage side three-phase winding terminal of the tested transformer, wherein the states of the high-voltage side three-phase winding terminal comprise a suspension state, a short-circuit state and a grounding state;
the low-voltage switching unit is used for switching the states of the low-voltage side three-phase winding terminal of the tested transformer, wherein the states of the low-voltage side three-phase winding terminal comprise a suspension state, a short-circuit state and a grounding state;
the power supply unit is used for supplying power to the tested transformer.
2. The automatic quality inspection testing device of the transformer according to claim 1, wherein the power supply unit comprises a direct current high voltage module, an alternating current high voltage module, a direct current constant current module and an alternating current variable frequency module; the direct-current high-voltage module provides direct-current high-voltage electricity; the alternating current high voltage module provides alternating current high voltage electricity; the direct current constant current module provides direct current constant current; the alternating current frequency conversion module provides alternating current.
3. The transformer automation quality inspection testing device according to claim 1 or 2, wherein the upper computer comprises a human-computer interaction unit, a function selection unit and a function execution unit; the man-machine interaction unit is used for operating the function selection unit; the function selection unit is used for selecting different function modules according to needs, wherein the function modules comprise an insulation resistance and absorption ratio measurement function module, a direct current resistance measurement function module, a voltage ratio measurement and connection group label verification function module, a no-load loss and no-load current measurement function module, a short-circuit impedance and load loss measurement function module, an induction withstand voltage test function module, an external withstand voltage test function module and a dielectric loss factor and capacitance measurement function module.
4. The transformer automation quality inspection testing device according to claim 3, wherein the function execution unit comprises an insulation resistance and absorption ratio measurement execution module, a direct current resistance measurement execution module, a voltage ratio measurement and connection group label verification execution module, a no-load loss and no-load current measurement execution module, a short-circuit impedance and load loss measurement execution module, an induction withstand voltage test execution module, an external withstand voltage test execution module and a dielectric loss factor and capacitance measurement execution module;
the insulation resistance and absorption ratio measurement execution module executes the measurement of the insulation resistance and absorption ratio between the high-voltage side three-phase winding and the low-voltage side three-phase winding of the tested transformer and the shell of the tested transformer;
the direct-current resistance measurement execution module executes direct-current resistance measurement of the high-voltage side three-phase winding and the low-voltage side three-phase winding at all tapping positions of the tapping switch of the tested transformer;
the voltage ratio measurement and connection group label verification execution module executes voltage ratio measurement and connection group label verification of all tapping positions of the tapping switch;
the no-load loss and no-load current measurement execution module executes no-load loss and no-load current measurement of the tested transformer;
the short-circuit impedance and load loss measurement execution module executes short-circuit impedance and load loss measurement of the high voltage to the three-phase winding at the low voltage side of the tested transformer;
the induction voltage-withstand test execution module executes an induction voltage-withstand test of the tested transformer;
the external voltage withstand test execution module executes an external voltage withstand test between the high-voltage side three-phase winding and the low-voltage side three-phase winding of the tested transformer and the shell of the tested transformer;
the dielectric loss factor and capacitance measurement execution module executes the dielectric loss factor and capacitance measurement, wherein the dielectric loss factor and capacitance measurement comprises the following steps: 1. measuring the dielectric loss factor and capacitance between the high-voltage side three-phase winding of the tested transformer and the shell of the tested transformer; 2. measuring the dielectric loss factor and capacitance between the three-phase winding at the low-voltage side of the tested transformer and the shell of the tested transformer; 3. and measuring the dielectric loss factor and the capacitance between the high-voltage side three-phase winding and the low-voltage side three-phase winding of the tested transformer and the shell of the tested transformer.
5. An automatic quality inspection test method for a transformer is characterized by comprising the following steps:
the upper computer selects a test item and outputs a corresponding test instruction;
the digital measurement main control unit receives a test instruction;
the data measurement main control unit switches power supply modes of the power supply unit according to the test instruction, wherein the power supply modes of the power supply unit comprise a direct current high-voltage power supply mode, an alternating current high-voltage power supply mode, a direct current constant-current power supply mode and an alternating current variable-frequency power supply mode;
the digital measurement main control unit controls the high-voltage switching unit and the low-voltage switching unit to respectively switch the states of a high-voltage side three-phase winding terminal and a low-voltage side three-phase winding terminal of the measured transformer according to the test instruction, wherein the states of the high-voltage side three-phase winding terminal and the low-voltage side three-phase winding terminal comprise a suspension state, a short-circuit state and a grounding state;
the high-voltage switching unit and the low-voltage switching unit transmit test data of the transformer back to the upper computer for storage and display through the data measurement main control unit.
6. The automatic quality inspection test method of the transformer according to claim 5, wherein the upper computer selects test items, and the method comprises the following steps:
the man-machine interaction unit selects one or more detection items;
the function selection unit outputs an instruction to the corresponding function execution unit according to the selection of the human-computer interaction unit;
the function execution unit executes the corresponding instruction and outputs the corresponding instruction to the data measurement main control unit; the function execution unit executes output instructions including insulation resistance and absorption ratio measurement instructions, direct current resistance measurement instructions, voltage ratio measurement and connection group label verification instructions, no-load loss and no-load current measurement instructions, short-circuit impedance and load loss measurement instructions, induction voltage-withstand test instructions, external voltage-withstand test instructions and dielectric loss factor and capacitance measurement instructions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110712211.8A CN113447856A (en) | 2021-06-25 | 2021-06-25 | Automatic quality inspection testing device and method for transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110712211.8A CN113447856A (en) | 2021-06-25 | 2021-06-25 | Automatic quality inspection testing device and method for transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113447856A true CN113447856A (en) | 2021-09-28 |
Family
ID=77813005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110712211.8A Pending CN113447856A (en) | 2021-06-25 | 2021-06-25 | Automatic quality inspection testing device and method for transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113447856A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114236271A (en) * | 2021-12-01 | 2022-03-25 | 国网山东省电力公司电力科学研究院 | On-site calibration method and system for transformer comprehensive detection device |
| WO2023138045A1 (en) * | 2022-01-21 | 2023-07-27 | 苏州华电电气股份有限公司 | Energy efficiency index detection apparatus for power transformer |
| CN117665463A (en) * | 2023-12-14 | 2024-03-08 | 山东省产品质量检验研究院 | Transformer test system and method |
| CN114236271B (en) * | 2021-12-01 | 2024-05-31 | 国网山东省电力公司电力科学研究院 | On-site verification method and system for comprehensive detection device of transformer |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104215835A (en) * | 2014-09-18 | 2014-12-17 | 杭州西湖电子研究所 | Automatic measuring system for main transformer |
| CN107356830A (en) * | 2017-06-16 | 2017-11-17 | 国家电网公司 | Analogue transformer actual training device |
| CN112748371A (en) * | 2020-12-18 | 2021-05-04 | 国网福建省电力有限公司检修分公司 | Universal test structure and logic control method for multiple test items of transformer test |
-
2021
- 2021-06-25 CN CN202110712211.8A patent/CN113447856A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104215835A (en) * | 2014-09-18 | 2014-12-17 | 杭州西湖电子研究所 | Automatic measuring system for main transformer |
| CN107356830A (en) * | 2017-06-16 | 2017-11-17 | 国家电网公司 | Analogue transformer actual training device |
| CN112748371A (en) * | 2020-12-18 | 2021-05-04 | 国网福建省电力有限公司检修分公司 | Universal test structure and logic control method for multiple test items of transformer test |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114236271A (en) * | 2021-12-01 | 2022-03-25 | 国网山东省电力公司电力科学研究院 | On-site calibration method and system for transformer comprehensive detection device |
| CN114236271B (en) * | 2021-12-01 | 2024-05-31 | 国网山东省电力公司电力科学研究院 | On-site verification method and system for comprehensive detection device of transformer |
| WO2023138045A1 (en) * | 2022-01-21 | 2023-07-27 | 苏州华电电气股份有限公司 | Energy efficiency index detection apparatus for power transformer |
| CN117665463A (en) * | 2023-12-14 | 2024-03-08 | 山东省产品质量检验研究院 | Transformer test system and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104215835A (en) | Automatic measuring system for main transformer | |
| CN200953040Y (en) | Turn-to-turn compact resistance voltage testing instrument | |
| CN113447856A (en) | Automatic quality inspection testing device and method for transformer | |
| CN102707173A (en) | Tester | |
| CN106772208B (en) | Single three-phase meter integrated reliability test board | |
| CN106646209A (en) | High and low temperature trip intelligent test device for cost-control circuit breaker | |
| CN116106659B (en) | Distribution transformer energy efficiency high-precision test system and application | |
| CN217587447U (en) | Intelligent energy efficiency device of distribution transformer and conversion circuit for intelligent detection | |
| CN109765453A (en) | A kind of Protection secondary circuit wiring automatic tester | |
| CN203204081U (en) | Tester | |
| CN208092201U (en) | A kind of change of current change load ratio bridging switch switching waveform measuring device | |
| CN110673054A (en) | DC/DC power supply test system and aging test method of DC/DC power supply | |
| CN217385689U (en) | Multi-station test system and test platform | |
| CN111025062A (en) | SVG power module test system and method | |
| CN217689239U (en) | Multi-voltage-level energy storage converter test platform | |
| CN114441896B (en) | Distribution network automatic simulation platform and FTU detection method | |
| CN115453141A (en) | Three-phase transfer speed measuring device of circuit breaker | |
| CN209979826U (en) | Testing device of distribution transformer | |
| CN202102059U (en) | Power unit testing apparatus | |
| CN103954869A (en) | Cable power frequency parameter testing device based on PXI system | |
| CN210401533U (en) | Bus main line thermal cycle testing device | |
| CN210514502U (en) | Reactor test system | |
| CN218848242U (en) | High-efficient comprehensive testing device of transformer | |
| CN207082849U (en) | Reactive compensation cabinet | |
| CN111707894A (en) | Mining electric energy quality on-line measuring system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |