CN112098750A - Transformer dynamic thermal stability test device based on charging capacitor - Google Patents
Transformer dynamic thermal stability test device based on charging capacitor Download PDFInfo
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- CN112098750A CN112098750A CN202010930476.0A CN202010930476A CN112098750A CN 112098750 A CN112098750 A CN 112098750A CN 202010930476 A CN202010930476 A CN 202010930476A CN 112098750 A CN112098750 A CN 112098750A
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- 238000013112 stability test Methods 0.000 title claims abstract description 26
- 239000003990 capacitor Substances 0.000 title claims abstract description 10
- 238000004146 energy storage Methods 0.000 claims abstract description 40
- 238000005259 measurement Methods 0.000 claims description 16
- 238000002955 isolation Methods 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 239000013307 optical fiber Substances 0.000 description 2
- 241000208199 Buxus sempervirens Species 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/28—Provision in measuring instruments for reference values, e.g. standard voltage, standard waveform
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- General Physics & Mathematics (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention relates to the technical field of dynamic thermal stability tests of transformers, in particular to a dynamic thermal stability test device of a transformer based on a charging capacitor. The invention has simple structure, convenient use and low cost, stores a large amount of capacity through the large-capacity capacitive energy storage unit, quickly releases the capacity, and provides the required voltage for the tested transformer during short circuit through inversion and voltage regulation of the inversion unit, thereby completing the dynamic thermal stability test of the tested transformer, effectively reducing the requirement of the dynamic thermal stability test of the transformer on the power supply capacity of a power grid, being beneficial to popularization and having wide application prospect.
Description
Technical Field
The invention relates to the technical field of transformer dynamic thermal stability tests, in particular to a transformer dynamic thermal stability test device based on a charging capacitor.
Background
The safe and stable operation of the power grid is of great significance to national economy, along with the continuous interconnection of the power grid, the operation environment of the power system is more complex, and the requirement on the safe and stable operation of the power grid is higher and higher. The main performance of key equipment of a power grid comprises temperature rise, insulation and short-circuit performance, the short-circuit performance is a key item of a power transmission and distribution item, aiming at key equipment such as a transformer, an American and European box transformer, a JP cabinet and the like, the short-time tolerance of the key equipment is a most key parameter, most of the parameters cannot be completely equivalent through design and can only be verified through an actual dynamic thermal stability test, meanwhile, the rated current of the domestic main power transmission and distribution equipment is improved to 2500A to 4000A from 1000A, and the short-circuit current is improved to 31.5 to 63kA from 16 to 20kA, even higher. The traditional transformer dynamic thermal stability test needs to lean against a large power grid or a self-built generator system, meets the requirement of the transformer dynamic thermal stability energy test on capacity, has large investment and large occupied area, and seriously restricts the performance test of the transformer.
Disclosure of Invention
The invention provides a transformer dynamic thermal stability test device based on a charging capacitor, overcomes the defects of the prior art, and can effectively solve the problems of large investment, large occupied area and unfavorable popularization of the existing transformer dynamic thermal stability test needing to lean against a large power grid or a self-built generator system.
The technical scheme of the invention is realized by the following measures: the utility model provides a transformer dynamic thermal stability test device based on charging capacitor, includes power supply unit, large capacity capacitanc energy storage unit, contravariant unit, counts and surveys the main control unit, power supply unit and large capacity capacitanc energy storage unit are connected, and large capacity capacitanc energy storage unit is connected with the contravariant unit, counts and surveys the main control unit and is connected power supply unit, large capacity capacitanc energy storage unit and contravariant unit respectively.
The following is further optimization or/and improvement of the technical scheme of the invention:
the inversion unit can comprise an inversion control module and a current inversion module, the inversion control module comprises an upper computer, a lower computer and an isolating switch module, the current inversion module is respectively connected with the lower computer and the isolating switch module, the lower computer is connected with the upper computer, and the upper computer is connected with the data measurement main control unit.
The current inversion module may include one or more inverters.
The large-capacity capacitive energy storage unit can comprise one or more large-capacity capacitive energy storage box bodies.
The high-capacity capacitive energy storage unit further comprises a display module and a capacity control module, wherein each high-capacity capacitive energy storage box body is connected with the capacity control module, and the capacity control module is connected with the display module.
The digital measurement main control unit can be an oscilloscope.
The invention has simple structure, convenient use and low cost, stores a large amount of capacity through the large-capacity capacitive energy storage unit, quickly releases the capacity, and provides the required voltage for the tested transformer during short circuit through inversion and voltage regulation of the inversion unit, thereby completing the dynamic thermal stability test of the tested transformer, effectively reducing the requirement of the dynamic thermal stability test of the transformer on the power supply capacity of a power grid, being beneficial to popularization and having wide application prospect.
Drawings
Fig. 1 is a circuit structure diagram of the preferred embodiment of the present invention.
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:
as shown in fig. 1, the dynamic thermal stability test device for the transformer based on the charging capacitor comprises a power supply unit, a large-capacity capacitive energy storage unit, an inversion unit and a data measurement main control unit, wherein the power supply unit is connected with the large-capacity capacitive energy storage unit, the large-capacity capacitive energy storage unit is connected with the inversion unit, and the data measurement main control unit is respectively connected with the power supply unit, the large-capacity capacitive energy storage unit and the inversion unit.
In the above technical solution, the power supply unit is used for charging the large-capacity capacitive energy storage unit. The large-capacity capacitive energy storage unit can be arranged in the container and used for providing electric energy for the inversion unit, and the large-capacity capacitive energy storage unit can be recycled. The inversion unit is used for carrying out inversion voltage regulation on the output electric energy of the large-capacity capacitive energy storage unit and outputting the voltage required by the tested transformer. The digital measurement main control unit can be a data measurement and control computer and is used for controlling the power supply unit to charge the high-capacity capacitive energy storage unit, starting the inverter unit, obtaining and recording current, voltage, temperature and communication parameters of the power supply unit, obtaining and recording current, voltage, temperature and communication parameters of the high-capacity capacitive energy storage unit, and inputting current, voltage, phase and frequency at the primary side of the tested transformer, namely the output current, voltage, phase and frequency of the inverter unit; and determining the dynamic thermal stability of the tested transformer according to the primary side input current, voltage, phase and frequency of the tested transformer.
In the technical scheme, the data measurement main control unit can also realize data transmission to a remote monitoring platform through optical fibers, wireless, network cables and the like, and can remotely print data through a printer.
The specific working process is as follows:
firstly, connecting the output end of an inversion unit with the primary side of a tested transformer, and short-circuiting the secondary side of the tested transformer; then, the digital measurement main control unit controls the power supply unit to charge the high-capacity capacitive energy storage unit, and controls the power supply unit to stop charging after the digital measurement main control unit monitors that the high-capacity capacitive energy storage unit reaches a preset value; then, starting the inversion unit to work, outputting the required voltage when the tested transformer is short-circuited, and acquiring and recording the primary side input current, voltage, phase and frequency of the tested transformer, namely the output current, voltage, phase and frequency of the inversion unit when the tested transformer is short-circuited by the digital testing main control unit; and finally, the working personnel obtains a test conclusion according to the data recorded by the data measurement main control unit.
During the test, the three phases of the tested transformer can be tested simultaneously or separately.
In conclusion, the invention has simple structure, convenient use and low cost, can store and quickly release a large amount of capacity through the large-capacity capacitive energy storage unit, and provides the required voltage for the tested transformer during short circuit through inversion and voltage regulation of the inversion unit, thereby completing the dynamic thermal stability test of the tested transformer, effectively reducing the requirement of the dynamic thermal stability test of the transformer on the power supply capacity of a power grid, being beneficial to popularization and having wide application prospect.
The dynamic thermal stability test device of the transformer based on the charging capacitor can be further optimized or/and improved according to actual needs:
as shown in the attached figure 1, the inversion unit comprises an inversion control module and a current inversion module, the inversion control module comprises an upper computer, a lower computer and an isolating switch module, the current inversion module is respectively connected with the lower computer and the isolating switch module, the lower computer is connected with the upper computer, and the upper computer is connected with the digital measurement main control unit.
In the technical scheme, the inversion control module comprises an upper computer, a lower computer and an isolating switch module; the upper computer can be an industrial computer or a notebook computer and is used for controlling the lower computer to obtain data returned by the lower computer and communicate with the data measurement main control unit to realize the transmission of the data and the instructions; the lower computer comprises a master control board, a sub-control board and a sub-control board, all optical fiber isolation is adopted for communication of the lower computer, instructions of the upper computer are executed, output current, voltage, phase and frequency of the current inversion module are obtained, and faulty components in the current inversion module can be automatically cut off. The output isolating switch is used for controlling the on-off of the inversion control module and the primary side of the tested transformer.
Among the above-mentioned technical scheme, the contravariant control module is used for carrying out the contravariant with direct current voltage and electric current, and the contravariant is the alternating current waveform that frequency, voltage, the amplitude and the wave form of electric current are controllable, accomplishes the filtering to it simultaneously.
As shown in fig. 1, the current inversion module includes one or more inverters.
In the technical scheme, the inverter can be a silicon controlled inverter or an insulated gate bipolar transistor inverter, can provide constant voltage power supply, and does not need a synchronous switch. The plurality of inverters can be connected in series through multiple stages or connected in parallel through multiple stages to expand output power.
As shown in fig. 1, the large-capacity capacitive energy storage unit includes one or more large-capacity capacitive energy storage cases.
Among the above-mentioned technical scheme, the energy that single large capacity capacitive energy storage box body stored can be 40kJ to through the series-parallel extension of a plurality of large capacity capacitive energy storage box bodies, satisfy the extension of different transformer test capacity.
As shown in fig. 1, the large-capacity capacitive energy storage unit further includes a display module and a capacity control module, each large-capacity capacitive energy storage box is connected to the capacity control module, and the capacity control module is connected to the display module.
In the technical scheme, the type of the capacity control module can be CN-1250-0.1, and the capacity control module is used for collecting basic parameters of each high-capacity capacitive energy storage box body and independently controlling and isolating each high-capacity capacitive energy storage box body. The display module is used for displaying the basic parameters of each high-capacity capacitive energy storage box body.
And the digital measurement main control unit is an oscilloscope according to the requirement.
In the technical scheme, the oscilloscope can acquire, display and derive the output current, voltage, phase and frequency of the inversion unit.
The above technical features constitute the best embodiment of the present invention, which has strong adaptability and best implementation effect, and unnecessary technical features can be increased or decreased according to actual needs to meet the requirements of different situations.
Claims (7)
1. The utility model provides a transformer dynamic thermal stability test device based on charging capacitor which characterized in that includes power supply unit, large capacity capacitanc energy storage unit, contravariant unit, counts and surveys the main control unit, power supply unit and large capacity capacitanc energy storage unit are connected, and large capacity capacitanc energy storage unit is connected with the contravariant unit, counts and surveys the main control unit and is connected power supply unit, large capacity capacitanc energy storage unit and contravariant unit respectively.
2. The charging capacitor-based transformer dynamic thermal stability test device according to claim 1, wherein the inversion unit comprises an inversion control module and a current inversion module, the inversion control module comprises an upper computer, a lower computer and an isolation switch module, the current inversion module is respectively connected with the lower computer and the isolation switch module, the lower computer is connected with the upper computer, and the upper computer is connected with the digital measurement main control unit.
3. The charging capacitance-based transformer dynamic thermal stability test device according to claim 2, wherein the current inversion module comprises one or more inverters.
4. The charging capacitance-based transformer dynamic thermal stability test device according to claim 1, 2 or 3, wherein the large-capacity capacitive energy storage unit comprises one or more large-capacity capacitive energy storage boxes.
5. The charging capacitance-based transformer dynamic thermal stability test device according to claim 4, wherein the large-capacity capacitive energy storage unit further comprises a display module and a capacity control module, each large-capacity capacitive energy storage box body is connected with the capacity control module, and the capacity control module is connected with the display module.
6. The charging capacitance-based transformer dynamic thermal stability test device according to claim 1, 2, 3 or 5, wherein the digital measurement main control unit is an oscilloscope.
7. The charging capacitance-based transformer dynamic thermal stability test device according to claim 4, wherein the digital measurement main control unit is an oscilloscope.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010930476.0A CN112098750A (en) | 2020-09-07 | 2020-09-07 | Transformer dynamic thermal stability test device based on charging capacitor |
| AU2021277768A AU2021277768B2 (en) | 2020-09-07 | 2021-09-07 | Charging capacitor-based dynamic-thermal stability test device for transformer |
| PCT/CN2021/116852 WO2022048678A1 (en) | 2020-09-07 | 2021-09-07 | Transformer dynamic thermal stabilization test device based on charging capacitance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010930476.0A CN112098750A (en) | 2020-09-07 | 2020-09-07 | Transformer dynamic thermal stability test device based on charging capacitor |
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| CN112098750A true CN112098750A (en) | 2020-12-18 |
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| CN202010930476.0A Pending CN112098750A (en) | 2020-09-07 | 2020-09-07 | Transformer dynamic thermal stability test device based on charging capacitor |
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| Country | Link |
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| CN (1) | CN112098750A (en) |
| AU (1) | AU2021277768B2 (en) |
| WO (1) | WO2022048678A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022048678A1 (en) * | 2020-09-07 | 2022-03-10 | 国网新疆电力有限公司电力科学研究院 | Transformer dynamic thermal stabilization test device based on charging capacitance |
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| CN112098750A (en) * | 2020-09-07 | 2020-12-18 | 国网新疆电力有限公司电力科学研究院 | Transformer dynamic thermal stability test device based on charging capacitor |
-
2020
- 2020-09-07 CN CN202010930476.0A patent/CN112098750A/en active Pending
-
2021
- 2021-09-07 WO PCT/CN2021/116852 patent/WO2022048678A1/en active Application Filing
- 2021-09-07 AU AU2021277768A patent/AU2021277768B2/en active Active
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| JP2002198597A (en) * | 2000-12-25 | 2002-07-12 | Origin Electric Co Ltd | Capacitor charging method and charging device |
| CN203870216U (en) * | 2014-02-28 | 2014-10-08 | 国家电网公司 | Short circuit performance testing system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2022048678A1 (en) * | 2020-09-07 | 2022-03-10 | 国网新疆电力有限公司电力科学研究院 | Transformer dynamic thermal stabilization test device based on charging capacitance |
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| Publication number | Publication date |
|---|---|
| AU2021277768A1 (en) | 2022-03-24 |
| WO2022048678A1 (en) | 2022-03-10 |
| AU2021277768B2 (en) | 2023-04-13 |
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