CN102262189A - Method for separating core excitation volt-amperes by double-core method - Google Patents
Method for separating core excitation volt-amperes by double-core method Download PDFInfo
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- CN102262189A CN102262189A CN2011100973036A CN201110097303A CN102262189A CN 102262189 A CN102262189 A CN 102262189A CN 2011100973036 A CN2011100973036 A CN 2011100973036A CN 201110097303 A CN201110097303 A CN 201110097303A CN 102262189 A CN102262189 A CN 102262189A
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Abstract
The invention relates to a method for separating core excitation volt-amperes by a double-core method, belonging to the technical field of transformer loss testing methods. The technical proposal is that: two core models are adopted for separating no-load excitation volt-amperes of a transformer core. The two cores are actually one level of the core of a transformer product and are the same in material and jointing manner, jointing air gaps are strictly controlled and are kept consistent as much as possible, the sheet widths are the same, but the structural dimensions are different. A jointing area is represented in the form of actual volume to solve the excitation volt-amperes of the jointing area, and the proportion of the excitation volt-amperes of the jointing area in the transformer can be deduced and determined owing to the same unit in the results. The excitation capacity consumed at the jointing part of the cores and at the normal sheet lamination part can be separated by adopting the double-core method. The proportion of jointing capacity in the entire no-load excitation capacity is separated by means of the research on the excitation capacity consumed at the jointing part, thus laying a foundation for more intuitively and effectively designing the no-load performance parameters of a transformer, and improving product performance.
Description
Technical field:
The present invention relates to the method that a kind of two method unshakable in one's determination is separated excitatory volt-ampere unshakable in one's determination, belong to the test method technical field of transformer loss.
Background technology:
In the manufacturing process of transformer,, there are not clear and definite calculating and experimental verification, just estimated value though the size of seam has regulation.And in the manufacture process,, introduce very big randomness by manually-operated.Seam increases, and exciting curent and excitatory capacity can be far longer than design load, can't guarantee the no-load performance of product.Study the excitatory capacity that seam crossing consumes, help the size of design seam region in the design of transformer process, determine the no-load performance of transformer more accurately.
Summary of the invention:
The object of the invention provides the method that a kind of two method unshakable in one's determination is separated excitatory volt-ampere unshakable in one's determination, the characteristic of research seam, isolate the ratio that the seam capacity accounts for the excitatory capacity of whole zero load, for more directly perceived, effectively design the no-load transformer performance parameter and lay a good foundation, can enhance product performance, solve the problems referred to above that exist in the background technology.
Technical scheme of the present invention is: two methods unshakable in one's determination are separated the method for excitatory volt-ampere unshakable in one's determination, adopt two core model, and unloaded excitatory volt-ampere of transformer core separated.
Two iron cores are actually the one-level of power transformer product iron core, accomplish that material is identical, and joint form is identical, and the seam air gap is strictly controlled, and is consistent as far as possible.Sheet is wide identical, but the physical dimension difference.
Exciting curent produces main flux unshakable in one's determination, when iron core acquire a certain degree saturated, when producing main flux, understand some leakage flux and take place.Under idle condition and in certain magnetic flux density scope,, can think that total excitatory volt-ampere only consumes on the core limb and iron yoke beyond seam unshakable in one's determination and the seam as a kind of approximate engineering treatment method.
On a core model, can record gaining merit and idle component of core loss, can obtain total excitatory volt-ampere and meritorious iron loss unshakable in one's determination, but can not on the separate unit model, realize total excitatory volt-ampere of separating with the method for experiment at seam and post yoke position.The present invention proposes to have realized with " two methods unshakable in one's determination " separation of total excitatory volt-ampere unshakable in one's determination, promptly, have identical seam pattern, identical materials but the different core model of physical dimension is measured total excitatory volt-ampere unshakable in one's determination respectively based on two, and calculate according to experimental result and to determine the distribution condition of total excitatory volt-ampere in seaming zone unshakable in one's determination and core limb-yoke district.
In total excitatory volt-ampere separated, seam unshakable in one's determination has different disposal routes: traditional method was joint treatment unshakable in one's determination the plane seam, the paired joint treatment of this closed assembly seam equivalence, promptly was characterized by the excitatory volt-ampere of unit area; And in fact, iron core is the seam pattern that adopts the stepping overlap joint to form by lamination, and the overall width of overlap joint is 10mm, and promptly the width of each side of " how much seams " of imagination is 5mm.Like this, actual seam unshakable in one's determination no longer is the notion of " plane suture ", but one comprise seam at interior volume, is called " the seam domain of influence ".In fact, handle like this scope of application of having expanded " tradition " method.
The present invention proposes the notion of " the seam domain of influence ", showed seam region with the form of actual volume, ask for its excitatory volt-ampere, unit is identical as a result, can derive and determine the ratio of the excitatory volt-ampere of transformer seam region.
The invention has the beneficial effects as follows: adopt two methods unshakable in one's determination, can separate the excitatory capacity that seam crossing unshakable in one's determination and normal lamination place consume.The excitatory capacity that the research seam crossing consumes is isolated the ratio that the seam capacity accounts for the excitatory capacity of whole zero load, for more directly perceived, effectively design the no-load transformer performance parameter and lay a good foundation, can enhance product performance.
Description of drawings:
Fig. 1 is embodiment of the invention laminated core model one synoptic diagram;
Fig. 2 is embodiment of the invention laminated core model two synoptic diagram;
Fig. 3 is the embodiment of the invention seam domain of influence (hachure part) synoptic diagram;
Fig. 4 is embodiment of the invention B
m-q
cThe synoptic diagram that concerns with the x value;
Fig. 5 is the B that the embodiment of the invention is determined based on two core model
m-q
cThe data that provide with Wuhan Iron and Steel Plant compare synoptic diagram;
Fig. 6 is that the embodiment of the invention is with the variation B of seam to the core portion extended distance
m-q
jCurve synoptic diagram;
Fig. 7 is that the result of the excitatory volt-ampere of seam of embodiment of the invention distinct methods processing compares synoptic diagram;
Embodiment:
Below in conjunction with accompanying drawing, the invention will be further described by embodiment.
In an embodiment, two iron cores are actually the one-level of power transformer product iron core, accomplish that material is identical, and joint form is identical, and the seam air gap is strictly controlled, and is consistent as far as possible.Sheet is wide identical, but the physical dimension difference.
One, two core model: with reference to accompanying drawing 1,2, the technical data of laminated core model one and laminated core model two is referring to table 1.
Table 1 pair core model data:
Two, decouples computation
Exciting curent produces main flux unshakable in one's determination, when iron core acquire a certain degree saturated, when producing main flux, understand some leakage flux and take place.Under idle condition and in certain magnetic flux density scope,, can think that total excitatory volt-ampere only consumes on the core limb and iron yoke beyond seam unshakable in one's determination and the seam as a kind of approximate engineering treatment method.
On a core model, can record gaining merit and idle component of core loss, can obtain total excitatory volt-ampere and meritorious iron loss unshakable in one's determination, but can not on the separate unit model, realize total excitatory volt-ampere of separating with the method for experiment at seam and post yoke position.The author proposes to have realized with " two methods unshakable in one's determination " separation of total excitatory volt-ampere unshakable in one's determination, promptly, have identical seam pattern, identical materials but the different core model of physical dimension is measured total excitatory volt-ampere unshakable in one's determination respectively based on two, and calculate according to experimental result and to determine the distribution condition of total excitatory volt-ampere in seaming zone unshakable in one's determination and core limb-yoke district.
In total excitatory volt-ampere separated, seam unshakable in one's determination has different disposal routes: traditional method was joint treatment unshakable in one's determination the plane seam, the paired joint treatment of this closed assembly seam equivalence, promptly was characterized by the excitatory volt-ampere of unit area; And in fact, iron core is the seam pattern that adopts the stepping overlap joint to form by lamination, and the overall width of overlap joint is 10mm, and promptly the width of each side of " how much seams " of imagination is 5mm.Like this, actual seam unshakable in one's determination no longer is the notion of " plane suture ", but one comprise seam at interior volume, is called " the seam domain of influence ".Do so in fact, handle the scope of application of having expanded " tradition " method like this, as shown in Figure 3.X among Fig. 3 represents the distance of the seam domain of influence by the outside continuation of the geometry seam of iron core, in order to the situation of the volume change that characterizes the seam domain of influence.
Below investigate the situation of excitatory volt-ampere with " domain of influence " volume change.The pairing distance of x is proportional among the variation of volume and Fig. 3, and five kinds of different distances are listed in table 2.
The distance that table 2 is corresponding with x
| Sequence number | 1 | 2 | 3 | 4 | 5 | 6 |
| X（mm） | 10 | 11.5 | 20 | 30 | 40 | 50 |
In certain magnetic flux density scope, measure the total excitatory volt-ampere of two (identical seam and same material, different structure size are arranged) core model respectively
, establish
Component in the seam domain of influence unshakable in one's determination and outer post-yoke zone thereof is respectively
With
, following relation can be arranged:
In the formula
V J1 : the volume (m of the Model C1 seam domain of influence
3);
V J2 : the volume (m of the Model C2 seam domain of influence
3);
V C1 : the volume (m of iron core outside the Model C1 seam domain of influence
3);
V C2 : the volume (m of iron core outside the Model C2 seam domain of influence
3);
ρ: the density of siliconized plate, get 7650kg/m herein
3
P Q1 : ModelC1 sets the total excitatory volt-ampere (VA) under the magnetic flux density;
P Q2 : ModelC2 is at the total excitatory volt-ampere of setting under the magnetic flux density (VA).
It may be noted that the increase along with degree of saturation, the seam domain of influence will outwards be expanded from the both sides of seam, see Fig. 3.
Utilize experimental data and system of equations (2), can obtain the excitatory volt-ampere of the seaming zone unit weight under the different magnetic flux densities
q j And the excitatory volt-ampere of core limb-yoke district unit weight
q c
B
m-q
cCurve
,Analyze the B that two methods unshakable in one's determination are determined as calculated
m-q
cThe value of curve and x is irrelevant, sees accompanying drawing 4.
Fig. 5 shows, the B that records from core model
m-q
cCurve in certain magnetic flux density scope, for example, 1.6T≤B
m≤ 1.9T is based on the B of core model
m-q
cThe B of the material that curve and Wuhan Iron and Steel Plant provide
m-q
cCurve has significantly deviation.As previously mentioned, because due to the difference of aspects such as both experiment conditions, seam pattern.In fact, because the influence factor in these manufacture processes can make excitatory volt-ampere unshakable in one's determination increase, far not ideal value.
B
m-q
jCurve, magnetic flux density and excitatory Voltammetric Relation B that the difference of the distance of extending to core portion by seam obtains
m-q
jCurve such as Fig. 6 show.Annotate: q
jThe average excitatory volt-ampere of the expression seam domain of influence.Fig. 6 shows situation about reducing gradually with average excitatory volt-ampere in the seam domain of influence expansion seaming zone.When seam was extended 11.5mm to core portion, the excitatory volt-ampere of the seam domain of influence was consistent with the corresponding excitatory volt-ampere of traditional seam area.
Classic method, the excitatory volt-ampere unit in seam region and post-yoke district is different, comparability intuitively not, and two method unshakable in one's determination is more directly perceived, more correspond to reality, and is more readily understood, and can obtain the result the same with classic method equally.See Fig. 7.
Claims (3)
1. the method that two methods unshakable in one's determination are separated excitatory volt-ampere unshakable in one's determination is characterized in that adopting two core model, and unloaded excitatory volt-ampere of transformer core separated.
2. separate method unshakable in one's determination excitatory volt-ampere according to the described two methods unshakable in one's determination of claim 1, it is characterized in that two iron cores are actually the one-level of power transformer product iron core, accomplish that material is identical, joint form is identical, the seam air gap is strictly controlled, be consistent, sheet is wide identical as far as possible, but the physical dimension difference.
3. separate method unshakable in one's determination excitatory volt-ampere according to the described two methods unshakable in one's determination of claim 2, it is characterized in that having showed seam region with the form of actual volume, ask for its excitatory volt-ampere, unit is identical as a result, can derive and determine the ratio of the excitatory volt-ampere of transformer seam region.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100973036A CN102262189A (en) | 2010-12-30 | 2011-04-19 | Method for separating core excitation volt-amperes by double-core method |
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|---|---|---|---|
| CN201010613407.3 | 2010-12-30 | ||
| CN201010613407 | 2010-12-30 | ||
| CN2011100973036A CN102262189A (en) | 2010-12-30 | 2011-04-19 | Method for separating core excitation volt-amperes by double-core method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103543338A (en) * | 2013-11-13 | 2014-01-29 | 保定天威集团有限公司 | Method and special device for measuring loss of iron cores, in different lap joint modes, of transformer |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0310813A1 (en) * | 1987-10-09 | 1989-04-12 | Asea Brown Boveri Inc. | Butt-lap-step core joint |
| CN2773870Y (en) * | 2004-11-30 | 2006-04-19 | 广东科旺电源设备有限公司 | Hopper-sensing insulated transformer with big power UPS and double iron core |
-
2011
- 2011-04-19 CN CN2011100973036A patent/CN102262189A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0310813A1 (en) * | 1987-10-09 | 1989-04-12 | Asea Brown Boveri Inc. | Butt-lap-step core joint |
| CN2773870Y (en) * | 2004-11-30 | 2006-04-19 | 广东科旺电源设备有限公司 | Hopper-sensing insulated transformer with big power UPS and double iron core |
Non-Patent Citations (1)
| Title |
|---|
| 张献 等: "基于双方圈模型的接缝区域容量测定和饱和特性研究", 《变压器》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103543338A (en) * | 2013-11-13 | 2014-01-29 | 保定天威集团有限公司 | Method and special device for measuring loss of iron cores, in different lap joint modes, of transformer |
| CN103543338B (en) * | 2013-11-13 | 2015-11-25 | 保定天威保变电气股份有限公司 | The method of a kind of measuring transformer different joint form loss unshakable in one's determination |
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Application publication date: 20111130 |