AU2021277768A1 - Charging capacitor-based dynamic-thermal stability test device for transformer - Google Patents
Charging capacitor-based dynamic-thermal stability test device for transformer Download PDFInfo
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- AU2021277768A1 AU2021277768A1 AU2021277768A AU2021277768A AU2021277768A1 AU 2021277768 A1 AU2021277768 A1 AU 2021277768A1 AU 2021277768 A AU2021277768 A AU 2021277768A AU 2021277768 A AU2021277768 A AU 2021277768A AU 2021277768 A1 AU2021277768 A1 AU 2021277768A1
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- capacitive energy
- thermal stability
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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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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The present disclosure relates to the technical field of dynamic-thermal stability tests of
transformers, and in particular, to a charging capacitor-based dynamic-thermal stability test
device for a transformer. The device includes a power supply unit (PSU), a large-capacity
capacitive energy storage unit, an inversion unit and a data measurement master control unit,
where the PSU is connected to the large-capacity capacitive energy storage unit, the
large-capacity capacitive energy storage unit is connected to the inversion unit, and the data
measurement master control unit is respectively connected to the PSU, the large-capacity
capacitive energy storage unit and the inversion unit. The present disclosure is simple in
structure, convenient in use and low in cost. Through the large-capacity capacitive energy
storage unit, the device can store the abundant capacity and release it quickly, invert the capacity
through the inversion unit for voltage regulation, and provide the voltage required when the
tested transformer is shorted, thereby completing the dynamic-thermal stability test of the tested
transformer. The present disclosure effectively reduces the requirements of the dynamic-thermal
stability test of the transformer for the power capacity of the power grid, facilitates the
promotion, and has a prosperous and wide future in application.
Description
[1] The present disclosure relates to the technical field of dynamic-thermal stability tests of transformers, and in particular, to a charging capacitor-based dynamic-thermal stability test device for a transformer.
[2] Safe and stable operation of power grids is of great significance to the national economy. With the constant interconnection of the power grids, environments where power systems operate are more complicated, thus imposing increasingly higher requirements on the safe and stable operation of the power grids. Main properties of key devices in the power grids include the temperature rise, insulativity and short-circuit performance, among which the short-circuit performance is crucial to power transmission and distribution. For key devices such as transformers, American box-type transformers, European box-type transformers and JP integrated distribution cabinets, the short-time withstand currents serve as the paramount parameters. Most of these parameters cannot be completely equivalent in design and can only be verified through the actual dynamic-thermal stability tests. Moreover, rate currents of main power transmission and distribution devices in China have been improved from 1000 A to 2500-4000 A, and the short-circuit currents have been improved from 16-20 kA to 31.5-63 kA or even higher. In order to meet the capacity requirements, conventional dynamic-thermal stability tests of the transformers are implemented based upon a large power grid or a self-built generator system with large investment and large land occupation, which seriously restricts the performance tests of the transformers.
[3] The present disclosure provides a charging capacitor-based dynamic-thermal stability test device for a transformer, to overcome the shortages of the prior art. The present disclosure can effectively solve the problem that existing dynamic-thermal stability tests of the transformers are implemented based upon a large power grid or a self-built generator system with large investment and large land occupation to be unfavorable for promotion.
[4] The present disclosure has the following technical solution: A charging capacitor-based dynamic-thermal stability test device for a transformer includes a power supply unit (PSU), a large-capacity capacitive energy storage unit, an inversion unit and a data measurement master control unit, where the PSU is connected to the large-capacity capacitive energy storage unit, the large-capacity capacitive energy storage unit is connected to the inversion unit, and the data measurement master control unit is respectively connected to the PSU, the large-capacity capacitive energy storage unit and the inversion unit.
151 The above technical solution of the present disclosure is further optimized or/and improved as follows:
[6] The inversion unit may include an inversion control module and a current inversion module, the inversion control module includes an upper computer, a lower computer and an isolator switch module, the current inversion module is respectively connected to the lower computer and the isolator switch module, the lower computer is connected to the upper computer, and the upper computer is connected to the data measurement master control unit.
[71 The current inversion module may include one or more inverters.
[8] The large-capacity capacitive energy storage unit may include one or more large-capacity capacitive energy storage boxes.
191 The large-capacity capacitive energy storage unit may further include 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.
[10] The data measurement master control unit may be an oscilloscope.
[11] The present disclosure is simple in structure, convenient in use and low in cost. Through the large-capacity capacitive energy storage unit, the device can store the abundant capacity and release it quickly, invert the capacity through the inversion unit for voltage regulation, and provide the voltage required when the tested transformer is shorted, thereby completing the dynamic-thermal stability test of the tested transformer. The present disclosure effectively reduces the requirements of the dynamic-thermal stability test of the transformer for the power capacity of the power grid, facilitates the promotion, and has a prosperous and wide future in application.
[12] FIG. 1 is a schematic structural view of a circuit according to an optimal embodiment of the present disclosure.
[13] The present disclosure is not limited by the following embodiments; and specific implementations may be determined according to the technical solutions and actual situations of the present disclosure.
[14] The present disclosure is further described below with reference to the embodiments and accompanying drawings.
[15] As shown in FIG. 1, a charging capacitor-based dynamic-thermal stability test device for a transformer includes a PSU, a large-capacity capacitive energy storage unit, an inversion unit and a data measurement master control unit, where the PSU is connected to the large-capacity capacitive energy storage unit, the large-capacity capacitive energy storage unit is connected to the inversion unit, and the data measurement master control unit is respectively connected to the PSU, the large-capacity capacitive energy storage unit and the inversion unit.
[16] In the above technical solution, the PSU is configured to charge the large-capacity capacitive energy storage unit. The large-capacity capacitive energy storage unit may be provided in a container, and is configured to provide electrical energy for the inversion unit. The large-capacity capacitive energy storage unit is recyclable and reusable. The inversion unit is configured to invert the output electrical energy of the large-capacity capacitive energy storage unit for voltage regulation, and output a voltage required when a tested transformer is shorted. The data measurement master control unit may be a data measurement and control computer, and is configured to control the PSU to charge the large-capacity capacitive energy storage unit, start the inversion unit to obtain and record current, voltage, temperature and communication parameters of the PSU, current, voltage, temperature and communication parameters of the large-capacity capacitive energy storage unit, and an input current, voltage, phase and frequency at a primary side of the tested transformer, namely an output current, voltage, phase and frequency of the inversion unit, and determine dynamic and thermal stabilities of the tested transformer according to the input current, voltage, phase and frequency at the primary side of the tested transformer.
[17] In the above technical solution, the data measurement master control unit may further transmit data to a remote monitoring platform through optical fibers, wireless networks, network cables and so on, and may print the data remotely through a printer.
[18] The specific working process is set forth as follows:
[19] The output end of the inversion unit is connected to the primary side of the tested transformer, and the secondary side of the tested transformer is shorted; the data measurement master control unit controls the PSU to charge the large-capacity capacitive energy storage unit, and when monitoring that the large-capacity capacitive energy storage unit is charged to a preset value, the data measurement master control unit controls the PSU to stop charging; the data measurement master control unit starts the inversion unit to output a voltage required when the tested transformer is shorted, thereby obtaining and recording the input current, voltage, phase and frequency at the primary side of the tested transformer when the tested transformer is shorted, namely the output current, voltage, phase and frequency of the inversion unit; and the operator draws a test conclusion according to data recorded by the data measurement master control unit.
[20] During the test, three phases of the tested transformer may be tested at the same time, and may also be tested separately.
[21] To sum up, the present disclosure is simple in structure, convenient in use and low in cost. Through the large-capacity capacitive energy storage unit, the device can store the abundant capacity and release it quickly, invert the capacity through the inversion unit for voltage regulation, and provide the voltage required when the tested transformer is shorted, thereby completing the dynamic-thermal stability test of the tested transformer. The present disclosure effectively reduces the requirements of the dynamic-thermal stability test of the transformer on the power capacity of the power grid, facilitates the promotion, and has a prosperous and wide future in application.
[22] The charging capacitor-based dynamic-thermal stability test device for a transformer may further be optimized or/and improved according to actual needs:
[23] As shown in FIG. 1, the inversion unit includes an inversion control module and a current inversion module, the inversion control module includes an upper computer, a lower computer and an isolator switch module, the current inversion module is respectively connected to the lower computer and the isolator switch module, the lower computer is connected to the upper computer, and the upper computer is connected to the data measurement master control unit.
[24] In the above technical solution, the inversion control module includes the upper computer, the lower computer and the isolator switch module. The upper computer may be an industrial computer or a notebook, and is configured to control the lower computer to obtain data transmitted back from the lower computer, and communicate with the data measurement master control unit to transmit data and instructions. The lower computer includes a master control board, a sub-control board and a branch control board. The lower computer uses an all-fiber isolator in communication, and is configured to execute instructions from the upper computer, acquire the output current, voltage, phase and frequency of the current inversion module and automatically disconnect faulty components in the current inversion module. The isolator switch module is configured to control connection and disconnection between the inversion control module and the primary side of the tested transformer.
[25] In the above technical solution, the inversion control module is configured to invert the direct current (DC) voltage and the current into alternating current (AC) waveforms of which amplitudes and waveforms for the frequency, voltage and current are controllable, and filter the waveforms.
[26] As shown in FIG. 1, the current inversion module includes one or more inverters.
[27] In the above technical solution, the inverters each may be a thyristor inverter or an insulated gate bipolar transistor (IGBT) inverter, and may provide the constant voltage power supply without the synchronous switch. Multiple inverters may be connected in series or connected in parallel at multiple levels to expand the output power.
[28] As shown in FIG. 1, the large-capacity capacitive energy storage unit includes one or more large-capacity capacitive energy storage boxes.
[29] In the above technical solution, the energy stored by the single large-capacity capacitive energy storage box may be 40kJ; and multiple large-capacity capacitive energy storage boxes are connected in series or in parallel for extension, thereby extending test capacities of different transformers.
[30] 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.
[31] In the above technical solution, the capacity control module has the model of CN-1250-0.1, and is configured to acquire basic parameters of each large-capacity capacitive energy storage box, and independently control and isolate each large-capacity capacitive energy storage box. The display module is configured to display the basic parameters of each large-capacity capacitive energy storage box.
[32] The data measurement master control unit is an oscilloscope as required.
[33] In the above technical solution, the oscilloscope can acquire, display and derive the output current, voltage, phase and frequency of the inversion unit.
[34] In the embodiment of the present disclosure, the PSU may be a power supply device, the isolator switch module includes one or more isolator switches, the display module includes one or more displays, and the capacity control module includes one or more sensors and controllers.
[35] The above technical features form the optimal embodiment of the present disclosure, with the strong adaptability and the optimal implementation effect. Unnecessary technical features may be added or omitted according to actual needs to meet requirements in different situations.
Claims (7)
- CLAIMS: 1. A charging capacitor-based dynamic-thermal stability test device for a transformer, comprising a power supply unit (PSU), a large-capacity capacitive energy storage unit, an inversion unit and a data measurement master control unit, wherein the PSU is connected to the large-capacity capacitive energy storage unit, the large-capacity capacitive energy storage unit is connected to the inversion unit, and the data measurement master control unit is respectively connected to the PSU, the large-capacity capacitive energy storage unit and the inversion unit.
- 2. The charging capacitor-based dynamic-thermal stability test device for a transformer 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 isolator switch module, the current inversion module is respectively connected to the lower computer and the isolator switch module, the lower computer is connected to the upper computer, and the upper computer is connected to the data measurement master control unit.
- 3. The charging capacitor-based dynamic-thermal stability test device for a transformer according to claim 2, wherein the current inversion module comprises one or more inverters.
- 4. The charging capacitor-based dynamic-thermal stability test device for a transformer 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 capacitor-based dynamic-thermal stability test device for a transformer 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 is connected to the capacity control module, and the capacity control module is connected to the display module.
- 6. The charging capacitor-based dynamic-thermal stability test device for a transformer according to claim 1, 2, 3 or 5, wherein the data measurement master control unit is an oscilloscope.
- 7. The charging capacitor-based dynamic-thermal stability test device for a transformer according to claim 4, wherein the data measurement master control unit is an oscilloscope.
Applications Claiming Priority (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 |
| CN202010930476.0 | 2020-09-07 | ||
| PCT/CN2021/116852 WO2022048678A1 (en) | 2020-09-07 | 2021-09-07 | Transformer dynamic thermal stabilization test device based on charging capacitance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU2021277768A1 true AU2021277768A1 (en) | 2022-03-24 |
| AU2021277768B2 AU2021277768B2 (en) | 2023-04-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| AU2021277768A Active AU2021277768B2 (en) | 2020-09-07 | 2021-09-07 | Charging capacitor-based dynamic-thermal stability test device for transformer |
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| Country | Link |
|---|---|
| CN (1) | CN112098750A (en) |
| AU (1) | AU2021277768B2 (en) |
| WO (1) | WO2022048678A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN103809116B (en) * | 2014-02-28 | 2018-01-19 | 国家电网公司 | A kind of short-circuit capability test system and its method |
| CN205081480U (en) * | 2015-09-17 | 2016-03-09 | 比亚迪股份有限公司 | Battery energy storage system |
| CN205811860U (en) * | 2016-07-19 | 2016-12-14 | 苏州工业园区海沃科技有限公司 | Storage transformer short-circuit impact experiment power supply |
| CN206611341U (en) * | 2017-04-11 | 2017-11-03 | 华北电力科学研究院有限责任公司 | A kind of distribution transformer short-circuit test power supply |
| CN206945842U (en) * | 2017-05-12 | 2018-01-30 | 国网上海市电力公司 | A kind of distribution reactive power compensator analogue test platform |
| JP7191526B2 (en) * | 2018-03-08 | 2022-12-19 | 東日本旅客鉄道株式会社 | Accelerated Aging Test Apparatus and Test Method for Transformer |
| CN109709425B (en) * | 2018-12-29 | 2020-05-22 | 国网冀北电力有限公司电力科学研究院 | System and method for testing short circuit bearing capacity of distribution transformer |
| CN110061565A (en) * | 2019-04-01 | 2019-07-26 | 国网新源张家口风光储示范电站有限公司 | A kind of energy storage charge/discharge capacity control system and method based on wind-driven generator |
| CN210490543U (en) * | 2019-10-14 | 2020-05-08 | 上海申睿电力电子有限公司 | Multi-stage energy storage element parallel charging and discharging system |
| CN111474423A (en) * | 2020-03-20 | 2020-07-31 | 西安交通大学 | Hybrid energy supply burst short circuit testing device and testing method |
| CN111551798A (en) * | 2020-03-20 | 2020-08-18 | 西安交通大学 | Low-voltage energy storage type high-power short circuit testing device and testing method |
| 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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| Publication number | Publication date |
|---|---|
| CN112098750A (en) | 2020-12-18 |
| WO2022048678A1 (en) | 2022-03-10 |
| AU2021277768B2 (en) | 2023-04-13 |
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