CN104344907A - Distribution transformer temperature rise test winding temperature on-line test system and method - Google Patents
Distribution transformer temperature rise test winding temperature on-line test system and method Download PDFInfo
- Publication number
- CN104344907A CN104344907A CN201310310253.4A CN201310310253A CN104344907A CN 104344907 A CN104344907 A CN 104344907A CN 201310310253 A CN201310310253 A CN 201310310253A CN 104344907 A CN104344907 A CN 104344907A
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- temperature rise
- resistance
- measuring
- substation transformer
- rise test
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/62—Testing of transformers
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
本发明公开了一种配电变压器温升试验绕组温度在线测试系统，包括三相电源、并联谐振电路、直流电阻测试仪、配电变压器及开关，三相电源的各相均串联一电容后接配电变压器，直流电阻测试仪与需测试的加压绕组线并联，并联谐振电路与直流电阻测试仪电性连接，开关连接于直流电阻测试仪的输入端及输出端之间。本发明还公开了一种配电变压器温升试验绕组温度在线测试系统，包括确定电容元件及电感元件参数、设计配电变压器温升试验绕组温度在线测试系统、调节可调电感使电路呈并联谐振状态，断开开关接入直流电阻测试仪进行测试分析。采用本发明的技术方案能够实现配电变压器温升试验过程中直流电阻的带电测试和绕组温升的直接计算。
The invention discloses a distribution transformer temperature rise test winding temperature online testing system, which comprises a three-phase power supply, a parallel resonant circuit, a DC resistance tester, a distribution transformer and a switch, and each phase of the three-phase power supply is connected in series with a capacitor. The distribution transformer is connected in parallel with the DC resistance tester and the pressurized winding wire to be tested, the parallel resonant circuit is electrically connected with the DC resistance tester, and the switch is connected between the input end and the output end of the DC resistance tester. The invention also discloses an online testing system for the winding temperature of the distribution transformer temperature rise test, including determining the parameters of the capacitive element and the inductive element, designing the online testing system for the temperature rise test winding temperature of the distribution transformer, and adjusting the adjustable inductance to make the circuit appear in parallel resonance state, disconnect the switch and connect it to a DC resistance tester for test analysis. The adoption of the technical scheme of the invention can realize the live test of the DC resistance and the direct calculation of the temperature rise of the winding during the temperature rise test process of the distribution transformer.
Description
Technical field
The present invention relates to for electrical domain, particularly a kind of substation transformer temperature rise test winding temperature Online Transaction Processing and method.
Background technology
Temperature rise test is whether examination transformer can the important evidence of safe operation reliably and with long-term.Test adopts short-circuit method, i.e. step down side short circuit, high-pressure side pressuring method usually.Wherein pressurize the temperature rise of winding generally after test completes, under deenergization state, is tested by continuous several times direct current resistance, adopt extrapolation method to obtain shutdown transient resistance (thermal resistance), and carry out calculatings acquisition in conjunction with cold resistance.
The error of resistance 0.4% in temperature rise test, requires that the accuracy of measuring resistance is very high, because can cause final temperature rise result of calculation to differ 1 DEG C.But, because pressurization winding temperature is higher, and winding resistance and temperature exponentially change in time, in addition in direct current resistance follow-on test, current stabilization also needs the regular hour, therefore its accuracy of shutdown transient resistance utilizing extrapolation method to obtain after adopting power-off to measure is difficult to be protected, and then has influence on the accuracy of winding temperature rise calculating.
Summary of the invention
The object of the present invention is to provide a kind of substation transformer temperature rise test winding temperature Online Transaction Processing and the method that can realize the live testing of direct current resistance and the direct calculating of winding temperature rise in substation transformer temperature rise test process.
To achieve these goals, technical scheme of the present invention is as follows:
A kind of substation transformer temperature rise test winding temperature Online Transaction Processing, comprises three-phase supply, antiresonant circuit, instrument for measuring DC resistance, substation transformer and switch.Connect substation transformer after each electric capacity of all connecting mutually of three-phase supply, to prevent DC current shunting action from affecting test result, utilize electric capacity to hinder the physical characteristics of direct current, control the circulation path of DC test electric current.Instrument for measuring DC resistance is in parallel with the pressurization winding wire that need test.Antiresonant circuit and instrument for measuring DC resistance are electrically connected, to ensure instrument for measuring DC resistance not by the impact of AC system (electric current), again because antiresonant circuit is open-circuit condition to alternating current, therefore the electrical isolation of AC system and DC resistance meter is achieved, make use of the characteristic that inductance element leads to direct current in addition, make DC test electric current normally can export Transformer Winding to.Between the input end that switch is connected to instrument for measuring DC resistance and output terminal, when the switch is closed by instrument for measuring DC resistance short circuit, when the switches are opened, instrument for measuring DC resistance work.
Preferably, antiresonant circuit comprises electric capacity and controllable impedance.
Preferably, substation transformer is Dyn11 type substation transformer.
Present invention also offers a kind of substation transformer temperature rise test winding temperature Online Transaction Processing, comprise the following steps:
1) in conjunction with temperature rise test voltage, electric current and transformer connection form, capacity cell and inductance element parameter is determined;
2) according to step 1) in the parameter designing substation transformer temperature rise test winding temperature Online Transaction Processing determined;
3) regulate controllable impedance to make circuit be parallel resonance state, cut-off switch access instrument for measuring DC resistance carries out test analysis.
Substation transformer temperature rise test winding temperature Online Transaction Processing of the present invention and method is adopted to have the following advantages:
1, utilize the principle of superposition theorem to be superimposed on alternating current by DC current, achieve the live testing of direct current resistance in substation transformer temperature rise test process;
2, utilize the ultimate principle of series resonance, achieve the electrical isolation of instrument for measuring DC resistance and AC system, namely parallel resonance system is open-circuit condition relative to alternating current, and instrument for measuring DC resistance can not be damaged because of excess current;
3, utilize inductance element to lead to direct current, resistance exchanges, capacity cell leads to interchanges, hinders the physical characteristics of direct current, controls and limits the outgoing route of DC current in instrument for measuring DC resistance;
4, there is the advantages such as detection is safe and reliable, test result is accurate, easy and simple to handle, antijamming capability is strong, solve the test accuracy problem of shutdown transient resistance in temperature rise test, achieve the accurate Calculation of winding temperature rise.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of substation transformer temperature rise test winding temperature Online Transaction Processing of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
As shown in Figure 1, be substation transformer temperature rise test winding temperature Online Transaction Processing of the present invention, wherein, 1 is three-phase supply, and 2 is antiresonant circuit, and 3 is instrument for measuring DC resistance, and 4 is substation transformer, and 5 is switch.
Substation transformer 4 is connect after each electric capacity of all connecting mutually of three-phase supply 1, instrument for measuring DC resistance 3 is in parallel with the pressurization winding wire that need test, antiresonant circuit 2 and instrument for measuring DC resistance 3 are electrically connected, between the input end that switch 5 is connected to instrument for measuring DC resistance 3 and output terminal, when switch 5 closes by instrument for measuring DC resistance 3 short circuit, when switch 5 disconnects, instrument for measuring DC resistance 3 works.
Antiresonant circuit 2 comprises electric capacity and controllable impedance, and substation transformer 4 is Dyn11 type substation transformer.
A kind of substation transformer temperature rise test winding temperature Online Transaction Processing, comprises the following steps:
1) in conjunction with temperature rise test voltage, electric current and transformer connection form, capacity cell and inductance element parameter is determined;
2) according to step 1) in the parameter designing substation transformer temperature rise test winding temperature Online Transaction Processing determined;
3) regulate controllable impedance to make circuit be parallel resonance state, cut-off switch access instrument for measuring DC resistance carries out test analysis.
The above is only the preferred embodiment of the present invention, it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also make some improvement, and these improvement also should be considered as protection scope of the present invention.
Claims (4)
1. a substation transformer temperature rise test winding temperature Online Transaction Processing, it is characterized in that: comprise three-phase supply (1), antiresonant circuit (2), instrument for measuring DC resistance (3), substation transformer (4) and switch (5), described substation transformer (4) is connect after each electric capacity of all connecting mutually of described three-phase supply (1), described instrument for measuring DC resistance (3) is in parallel with the pressurization winding wire that need test, described antiresonant circuit (2) and described instrument for measuring DC resistance (3) are electrically connected, between the input end that described switch (5) is connected to described instrument for measuring DC resistance (3) and output terminal, when described switch (5) is closed by described instrument for measuring DC resistance (3) short circuit, when described switch (5) disconnects, described instrument for measuring DC resistance (3) works.
2. substation transformer temperature rise test winding temperature Online Transaction Processing according to claim 1, is characterized in that: described antiresonant circuit (2) comprises electric capacity and controllable impedance.
3. substation transformer temperature rise test winding temperature Online Transaction Processing according to claim 1, is characterized in that: described substation transformer (4) is Dyn11 type substation transformer.
4. a substation transformer temperature rise test winding temperature on-line testing method, is characterized in that, comprise the following steps:
1) in conjunction with temperature rise test voltage, electric current and transformer connection form, capacity cell and inductance element parameter is determined;
2) according to step 1) in the parameter designing substation transformer temperature rise test winding temperature Online Transaction Processing determined;
3) regulate controllable impedance to make circuit be parallel resonance state, cut-off switch access instrument for measuring DC resistance carries out test analysis.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310310253.4A CN104344907A (en) | 2013-07-23 | 2013-07-23 | Distribution transformer temperature rise test winding temperature on-line test system and method |
| PCT/CN2014/082748 WO2015010612A1 (en) | 2013-07-23 | 2014-08-19 | System and method for online testing of temperature of distribution transformer heat run test winding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310310253.4A CN104344907A (en) | 2013-07-23 | 2013-07-23 | Distribution transformer temperature rise test winding temperature on-line test system and method |
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| Publication Number | Publication Date |
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| CN104344907A true CN104344907A (en) | 2015-02-11 |
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| CN201310310253.4A Pending CN104344907A (en) | 2013-07-23 | 2013-07-23 | Distribution transformer temperature rise test winding temperature on-line test system and method |
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| CN (1) | CN104344907A (en) |
| WO (1) | WO2015010612A1 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107576841A (en) * | 2017-09-18 | 2018-01-12 | 上海电机系统节能工程技术研究中心有限公司 | A kind of guard method for DC resistance meter test device |
| CN107870270A (en) * | 2016-09-27 | 2018-04-03 | 广州西门子变压器有限公司 | Direct current magnetic bias test equipment of transformer |
| CN107907831A (en) * | 2017-12-22 | 2018-04-13 | 深圳和而泰数据资源与云技术有限公司 | Winding temperature detection circuit, temperature measurement control system and temperature monitor |
| CN109239479A (en) * | 2018-07-17 | 2019-01-18 | 浙江华电器材检测研究所有限公司 | A kind of method of automatic measurement oil immersion-type distribution transformer temperature rise test overall process |
| CN110531122A (en) * | 2019-09-24 | 2019-12-03 | 国网重庆市电力公司电力科学研究院 | A kind of transformer temperature rise test equipment and its wiring control system |
| CN114113836A (en) * | 2021-11-15 | 2022-03-01 | 中煤科工集团沈阳研究院有限公司 | Temperature rise experiment device and method for isolation transformer |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105067890B (en) * | 2015-07-14 | 2018-10-19 | 山东双益电气有限责任公司 | Use the method and its measuring system of Zero flux method measuring transformer D.C. resistance |
| CN108982923A (en) * | 2017-06-01 | 2018-12-11 | 国网辽宁省电力有限公司营口供电公司 | A kind of direct-current resistance tester for transformer incubator |
| CN113255172B (en) * | 2021-07-12 | 2021-11-19 | 国网江西省电力有限公司电力科学研究院 | A real-time temperature rise calculation method for windings under repeated short-term short-circuit conditions |
| CN114509671B (en) * | 2022-04-20 | 2022-07-19 | 中国铁路设计集团有限公司 | GIS equipment contact state and load condition judgment method and system |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107870270A (en) * | 2016-09-27 | 2018-04-03 | 广州西门子变压器有限公司 | Direct current magnetic bias test equipment of transformer |
| CN107870270B (en) * | 2016-09-27 | 2023-06-13 | 广州西门子能源变压器有限公司 | DC magnetic bias test equipment for transformer |
| CN107576841A (en) * | 2017-09-18 | 2018-01-12 | 上海电机系统节能工程技术研究中心有限公司 | A kind of guard method for DC resistance meter test device |
| CN107907831A (en) * | 2017-12-22 | 2018-04-13 | 深圳和而泰数据资源与云技术有限公司 | Winding temperature detection circuit, temperature measurement control system and temperature monitor |
| CN107907831B (en) * | 2017-12-22 | 2024-04-19 | 深圳和而泰智能家电控制器有限公司 | Winding temperature detection circuit, temperature detection control system and temperature detector |
| CN109239479A (en) * | 2018-07-17 | 2019-01-18 | 浙江华电器材检测研究所有限公司 | A kind of method of automatic measurement oil immersion-type distribution transformer temperature rise test overall process |
| CN110531122A (en) * | 2019-09-24 | 2019-12-03 | 国网重庆市电力公司电力科学研究院 | A kind of transformer temperature rise test equipment and its wiring control system |
| CN114113836A (en) * | 2021-11-15 | 2022-03-01 | 中煤科工集团沈阳研究院有限公司 | Temperature rise experiment device and method for isolation transformer |
| CN114113836B (en) * | 2021-11-15 | 2023-10-27 | 中煤科工集团沈阳研究院有限公司 | Temperature rise experimental device and method for isolation transformer |
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| Publication number | Publication date |
|---|---|
| WO2015010612A1 (en) | 2015-01-29 |
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Application publication date: 20150211 |