CN101813716B - Manufacturing method of large generator stator bar electrical-heating aging test device - Google Patents
Manufacturing method of large generator stator bar electrical-heating aging test device Download PDFInfo
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- CN101813716B CN101813716B CN2009100733552A CN200910073355A CN101813716B CN 101813716 B CN101813716 B CN 101813716B CN 2009100733552 A CN2009100733552 A CN 2009100733552A CN 200910073355 A CN200910073355 A CN 200910073355A CN 101813716 B CN101813716 B CN 101813716B
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Abstract
The invention relates to a manufacturing method of a large generator stator bar electrical-heating aging test device, wherein the test device comprises a heating mould, a heating element, a temperature measuring element and an operating console, and overall monitoring on test temperature is carried out by adopting an internationally advanced PID (Proportion Integration Differentiation) microcomputer control system. An aluminum material with high heat conductivity coefficient is selected by the heating mould, and the heating mould is applicable for stator bars with various lengths and sizes by applying modular design; by computing the thermal capacity of a stator winding, the proper resistance value and the capacity of the heating element are determined to save electrical energy; six temperature measuring points are placed on each group of heating plates, and the temperature of each position of a specimen is measured by using high-precision Pt100 as the temperature measuring element; and an advanced temperature control mode of overtemperature warning in one path and PID in the other path is adopted by a temperature control system, and proper PID and OT (Operational Test) control parameters are selected to ensure that the temperature error in the whole electrical-heating aging test process is within +/-1 DEG C.
Description
Technical field: the method for making that the present invention relates to a kind of large generator stator bar electrical-heating aging test device.
Background technology:, need carry out electric heating ageing testing to insulation system for the anti-deterioration ability of check insulation system under electric stress and the effect of thermal stress double factor.Traditional electric heating ageing testing all carries out in the baking oven that can introduce hi-line, and its shortcoming is:
1) the test wire rod surface temperature is wayward, is easy to generate thermal breakdown and distorts agine mechaism.2) oven space is limited, and the line rod of long slightly size can only make an experiment by the intercepting partial-length, greatly the accuracy of influence test.3) big with baking oven test power consumption, simultaneously, long-time running very easily causes ageing equipment to damage.Along with genset to maximize, hugeization development, the cross section and the length of stator bar are increasing; And increasing along with Air-cooled Unit also becomes most important to the examination of the anti-deterioration ability of insulation system under electric stress and thermal stress effect, therefore, needs exploitation large generator stator bar electrical-heating aging test device and temperature control mode.
Summary of the invention: the objective of the invention is to develop the large generator stator bar electrical-heating aging test device and the temperature control mode of practicality, safety, so that various large scale line rods are carried out electric heating ageing testing.Technical scheme of the present invention is: a kind of method for making of large generator stator bar electrical-heating aging test device, and electrical-heating aging test device is made up of modularization heating mould, heating element, temperature element, operating console, and concrete steps are following:
1) heating mould of module design: heating mould is made up of heating plate, pressing plate and press strip; Be the good alumina based material of electric conductivity; Heating plate is of a size of 650mm * 200mm, the thick 30mm of being; Symmetry has two of the grooves of wide 20mm, dark 15mm, and is drilled with 8 in φ 10 holes and 8 on M6 screw thread; Pressing plate is of a size of 650mm * 135mm, adopts the bolt handle to close between heating plate and pressing plate, and with in the heating element insertion groove; The length of press strip is 650mm, and the width foundation does not design in the cross section of collinear rod;
2) selection of number of molds: according to the quantity that the length of line rod selects to install heating mould, for guaranteeing the uniform distribution of excellent length direction temperature along the line, each distance of organizing between the heating plate should be less than 100mm;
3) heating power: through calculating insulation system winding thermal capacitance, selecting power is that the heating tube of 500W is as heating element;
4) select precision be 0.2 ℃ Pt100 as temperature element, on each mould, insert 6 Pt100, wrapping heat-resisting and electric durability at the head of temperature element sensor can all good teflin tape;
5) operating console: operating console do as one likes contactor, relay, overcurrent relay, digital electronic ammeter is reliably formed, and has five independently heating units, and it has overtemperature prote, overcurrent protection function;
6) PID temperature control: temperature control system adopts one road overtemperature alarm, and the control mode of one road PID micro computer is carried out whole process control to process of the test.The present invention is safe and reliable through this test unit of water power 1,000,000 stator bar electrical-heating aging tests proofs, easy accessibility, temperature control accurately, can check the intrinsic performance of insulation system under electricity, hot double factor effect to greatest extent, reach domestic and international advanced level.
Embodiment:
As shown in Figure 1, the present invention is a kind of brand-new large generator stator bar electrical-heating aging test device and temperature control mode, and particular content is following:
1) heating mould of module design: heating mould is made up of heating plate 1, pressing plate 2, press strip 3 and groove 4, is the good alumina based material of electric conductivity.Heating plate is of a size of 650mm * 200mm, thick in 30mm, and symmetry has two of the grooves of wide 20mm, dark 15mm, and is drilled with 8 in φ 10 holes and 8 on M6 screw thread; Pressing plate is of a size of 650mm * 135mm, adopts the bolt handle to close between heating plate and pressing plate, and with in the heating element insertion groove; The length of press strip is 650mm, and the width foundation does not design in the cross section of collinear rod;
2) selection of number of molds: according to the quantity that the length of line rod selects to install heating mould, for guaranteeing the uniform distribution of excellent length direction temperature along the line, each distance of organizing between the heating plate should be less than 100mm;
3) heating power: through calculating insulation system winding thermal capacitance, select power be the heating tube of 500W as heating element, be example with 1 water power 1,000,000 stator bar electrical-heating aging test, need 20 heating tubes altogether, general power is 10kW; If use the Electric heat oven in the high-potting hall, its heating power is 54kW, therefore, can save a large amount of electric energy;
4) select precision be 0.2 ℃ Pt100 (RTD) as temperature element, on each mould, insert 6 Pt100, the temperature of the whole branch line rod of monitoring.For anti-principal vertical line rod punctures moment, pulse voltage is to the influence of temperature element, and wrapping heat-resisting and electric durability at the head of temperature element sensor can all good teflin tape;
5) operating console: the operating console do as one likes is compositions such as contactor, relay, overcurrent relay, digital electronic ammeter reliably, and have five independently heating units, and it has functions such as overtemperature prote, overcurrent protection;
6) PID temperature control: temperature control system adopts one road overtemperature alarm; The control mode of one road PID micro computer is carried out whole process control to process of the test; Have the advantages that in conjunction with this heating system programming rate is slow, waste heat is big; Through up to a hundred heating-coolings debugging, suitable PID and OT controlled variable are set, the temperature error in the assurance entire test is in ± 1 ℃.
Claims (1)
1. the method for making of a large generator stator bar electrical-heating aging test device, it is characterized in that: electrical-heating aging test device is made up of modularization heating mould, heating element, temperature element, operating console, and concrete steps are following:
1) heating mould of module design: heating mould is made up of heating plate, pressing plate and press strip; Be the good alumina based material of electric conductivity; Heating plate is of a size of 650mm * 200mm, the thick 30mm of being; Symmetry has two of the grooves of wide 20mm, dark 15mm, and is drilled with 8 in φ 10 holes and 8 on M6 screw thread; Pressing plate is of a size of 650mm * 135mm, adopts the bolt handle to close between heating plate and pressing plate, and with in the heating element insertion groove; The length of press strip is 650mm, and the width foundation does not design in the cross section of collinear rod;
2) selection of number of molds: according to the quantity that the length of line rod selects to install heating mould, for guaranteeing the uniform distribution of excellent length direction temperature along the line, each distance of organizing between the heating plate should be less than 100mm;
3) heating power: through calculating insulation system winding thermal capacitance, selecting power is that the heating tube of 500W is as heating element;
4) select precision be 0.2 ℃ Pt100 as temperature element, on each mould, insert 6 Pt100, wrapping heat-resisting and electric durability at the head of temperature element sensor can all good teflin tape;
5) operating console: operating console do as one likes contactor, relay, overcurrent relay, digital electronic ammeter is reliably formed, and has five independently heating units, and it has overtemperature prote, overcurrent protection function;
6) PID temperature control: temperature control system adopts one road overtemperature alarm, and the control mode of one road PID micro computer is carried out whole process control to process of the test.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100733552A CN101813716B (en) | 2009-12-07 | 2009-12-07 | Manufacturing method of large generator stator bar electrical-heating aging test device |
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| CN2009100733552A CN101813716B (en) | 2009-12-07 | 2009-12-07 | Manufacturing method of large generator stator bar electrical-heating aging test device |
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| CN101813716A CN101813716A (en) | 2010-08-25 |
| CN101813716B true CN101813716B (en) | 2012-07-04 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103399600B (en) * | 2013-08-19 | 2015-05-13 | 大连交通大学 | Coil bar solidification heating control system |
| CN103499714A (en) * | 2013-10-12 | 2014-01-08 | 哈尔滨电机厂有限责任公司 | Method for manufacturing stator bar dual-stress testing device |
| CN113917266B (en) * | 2021-10-12 | 2023-11-17 | 哈尔滨电机厂有限责任公司 | Method for eliminating tail cutting data errors in stator bar electrical aging test |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1402413A (en) * | 2002-09-13 | 2003-03-12 | 西安交通大学 | Electric machine stator wire bar multifactor ageing device and method |
| CN101060266A (en) * | 2007-06-06 | 2007-10-24 | 上海汽轮发电机有限公司 | A coil ageing heating method |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1402413A (en) * | 2002-09-13 | 2003-03-12 | 西安交通大学 | Electric machine stator wire bar multifactor ageing device and method |
| CN101060266A (en) * | 2007-06-06 | 2007-10-24 | 上海汽轮发电机有限公司 | A coil ageing heating method |
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