CN103310055B - A kind of method for designing of high-frequency high-voltage transformer for electrostatic dust collection - Google Patents
A kind of method for designing of high-frequency high-voltage transformer for electrostatic dust collection Download PDFInfo
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- CN103310055B CN103310055B CN201310232699.XA CN201310232699A CN103310055B CN 103310055 B CN103310055 B CN 103310055B CN 201310232699 A CN201310232699 A CN 201310232699A CN 103310055 B CN103310055 B CN 103310055B
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention discloses a kind of Optimization Design of high-frequency high-voltage transformer for electrostatic dust collection, comprise the design of high-frequency and high-voltage high-power transformer and the type selecting of material, being applied to by particle swarm optimization in the optimal design of transformer, is that target is optimized high frequency high voltage transformer with efficiency.Compared with prior art, invention introduces particle swarm optimization, can between each parameter of transformer strong coupling and dynamic feature on comprehensive optimizing, in particle swarm optimization, introduce the method for random adjustment inertia weight simultaneously, substantially increase the optimization efficiency of algorithm.
Description
Technical field
The present invention relates to a kind of method for designing of transformer, specifically a kind of method for designing of high-frequency high-voltage transformer for electrostatic dust collection.
Background technology
Along with rapid development of economy, the rapid emergence of modernization industrial city, the pollution of the mankind to air is on the rise.Among the city that many cigarette halogen stands in great numbers, have every day a large amount of flue gases to be discharged, these flue gases carry a large amount of dust, drastically influence health and the ecologic environment of the mankind, become one of four large pollutants.Along with the raising of human living standard, propose more and more higher requirement to environment, to this, China has successively formulated a series of laws and regulations and relevant criterion, the dust concentration in restriction industrial smoke.On January 1st, 2012, State Environmental Protection Administration and State Administration for Quality Supervision and Inspection and Quarantine jointly issue again and implement GB " fossil-fuel power plant atmospheric pollutant emission standard ".This standard has carried out more strict regulation to flue dust the highest permission concentration of emission, is reduced to 30mg/ cubic meter by original 50mg/ cubic meter, and requires to enforce.This makes present stage existing power frequency electric fly-ash separator be difficult to reach country of new thermal power plant and allow emission standard.
The appearance of high frequency electric source, can solve the problem faced by power frequency supply, high frequency electric source be large with corona discharge power, spark control performance is good, adaptability is stronger, energy saving and efficiency increasing obviously, highly integrated and miniaturization, the advantage such as easy for installation be subject to the attention of more and more researcher.But Current Domestic high-frequency transformer through-put power is difficult to do greatly, and the transfer efficiency of high-frequency transformer is not high yet, cause domestic electrostatic precipitation high-frequency and high-voltage power supply overall transfer power not high, transfer efficiency is low, the loss of transformer and temperature rise are very large, the product produced also is confined to the dedusting power source of miniwatt grade, and this makes high-frequency dust removing power supply be difficult to be used widely.
Summary of the invention
Little in order to overcome existing high-frequency transformer through-put power, the problem that transfer efficiency is low, the object of this invention is to provide a kind of method for designing of high-frequency high-voltage transformer for electrostatic dust collection, the high frequency high voltage transformer frequency of operation that the method obtains reaches 20kHz, and through-put power reaches 80kVA, adopts the transformer of particle swarm optimization to design to be optimized, its transfer efficiency is greatly improved, transformer temperature rise obviously declines, and transformer runs more stable, longer service life.
The object of the invention is to be achieved through the following technical solutions:
A method for designing for high-frequency high-voltage transformer for electrostatic dust collection, is characterized in that: the method uses particle swarm optimization to be optimized high frequency high voltage transformer, comprises the following steps:
1) as requested, determine the former vice-side winding turn ratio, determine former secondary rated current;
2) core material and core structure form is selected; Iron core material adopts 0.8mil(Mill) thick ultracrystalline magnetic core.
3) core section sum core dimensions is calculated; Described core dimensions is: 270*170*60*60, and namely core window area is 270*170, and core section amasss as 60*60.Meet the requirement of space and High-Voltage Insulation characteristic shared by the coiling of high-low pressure winding, and meet the powerful requirement of transmission.
4) the former vice-side winding number of turn is determined;
5) winding and principal and subordinate's insulating structure design;
6) high-low pressure Winding Design;
7) adjust core window area, if core window meets the demands, then perform step 8), otherwise get back to step 3);
8) calculate based on the copper loss under winding kelvin effect and proximity effect, if copper loss meets the demands, then perform step 9), otherwise get back to step 6);
9) calculate core loss, if core loss meets the demands, then perform step 10), otherwise get back to step 2);
10) adopting particle swarm optimization to carry out with efficiency is the parameter optimization of target, if efficiency meets the demands, perform step 11), otherwise get back to step 4), majorized function is:
Wherein: n is the turns ratio of primary and secondary in transformer;
D is coil wire diameter;
B is the magnetic induction density of magnetic material;
for m inequality constrain condition, be more than or equal to certain value by wire diameter d that power is limit;
for s equation is about condition, the computing formula of magnetic core active volume;
In the present invention, with the magnetic induction density of the turns ratio of primary and secondary, coil wire diameter, magnetic material for optimized variable, transformer efficiency is optimization aim, uses swarm optimization algorithm.
Be: first release objective function according to correlation formula, wherein containing transformer design parameter, by wherein needing the data optimized to be set to variable, the concrete numerical value of variable under optimal conditions after objective function is optimized, can be obtained with the pass of the concrete data of transformer.
11) distribution parameter of transformer is determined;
12) Temperature Rise Analysis of transformer and heat dissipation design;
13) fuel tank size and cooling device is determined;
14) calculate temperature rise, if transformer temperature rise meets the demands, continue next step, otherwise get back to step 12);
15) transformer Weight computation;
16) draw transformer outline dimensional drawing, complete design of transformer.
In the present invention, use particle swarm optimization to be optimized high frequency high voltage transformer, comprise the following steps:
(1) the Particle Swarm parameter of definition for optimizing high frequency high voltage transformer, and initialization is carried out to Particle Swarm parameter, as given binding occurrence to m inequality constrain condition of high frequency high voltage transformer, give initialization value to s equality constraint;
(2) Particle Swarm evolutionary generation gen and population scale size popsize is set;
(3) the maximal rate max_velocity of Particle Swarm is set;
(4) 0 matrix creating capable 8 row of popsize is initialization of population, wherein the 1st be classified as x-axis coordinate, 2nd is classified as y-axis coordinate, 3rd is classified as x-axis speed component, 4th is classified as y-axis speed component, the 5th x-axis coordinate being classified as personal best particle, the 6th y-axis coordinate being classified as personal best particle, 7th be classified as individual optimum just when, the 8th is classified as current individual adaptive value;
(5) each Particle Swarm fitness is evaluated;
(6) inertia weight and cognitive coefficient and coefficient of association are linked together, derive inertia weight
randomized policy be:
(7) individual history optimal location is calculated;
(8) colony's history optimal location is calculated;
(9) Particle Swarm speed and position is upgraded according to speed and location updating equation;
(10) judge whether end condition meets, if met, optimize and terminate, saving result, if do not met, turn back to step (5).
The iron core of high frequency high voltage transformer adopts high performance ultracrystalline magnetic core, ultracrystallite magnetic adopts super emergency cooling process to be cooled rapidly with the speed of 1,000,000 degree per second by the molten steel of fusing, by the crystallization and freezing that the temperature of so quick cooling occurs, form thickness and be approximately 30
strip, the strip of formation does not have length ordered structure, does not have grain and grain boundary yet, so be referred to as amorphous alloy yet.The advantages such as the soft magnet performance of this kind of material is good, and hardness is high, good corrosion resistance, and saturation magnetic induction is high, and coercive force is little, and resistivity is high, and loss is little, uses in switching mode power supply transformer, has volume little, and efficiency height is energy-conservation.
Beneficial effect of the present invention is: the Optimization Design of a kind of high frequency high voltage transformer that the present invention proposes, the frequency of operation of its transformer is high, through-put power is large, volume is little, frequency of operation reaches 20kHz, through-put power reaches 80kVA, adopt Particle Swarm Optimization, solve the strong coupling problem between each parameter of transformer, comprehensive optimizing in the feature of the strong coupling and dynamic between each parameter of transformer, substantially increase the operational efficiency of transformer, transformer temperature rise obviously declines, transformer runs more stable, longer service life.
Accompanying drawing explanation
Fig. 1 high-frequency electrostatic fly-ash separator structured flowchart;
Fig. 2 is based on the process flow diagram of the design of transformer method of high frequency and high pressure characteristics;
Fig. 3 is based on the process flow diagram of the high frequency high voltage transformer optimization method of particle swarm optimization;
Particle speed and the location updating of Fig. 4 particle swarm optimization show process flow diagram;
The particle position of Fig. 5 particle swarm optimization upgrades schematic diagram;
The physical dimension schematic diagram of microcrystalline iron core in Fig. 6 the present invention.
specific implementation method
Below with reference to the accompanying drawings the present invention is further described with specific implementation method.
As depicted in figs. 1 and 2, for being applied in the design flow diagram based on high-frequency and high-voltage transformation on electrostatic precipitation, concrete steps are:
1) determine each primitive technology data according to design objective, determine the former vice-side winding turn ratio, determine former secondary rated current;
2) select core material and core structure form, the present invention adopts ultracrystalline magnetic core as transformer core, and the microcrystalline iron core version of selection as shown in Figure 5.Iron core material adopts 0.8mil(Mill) thick ultracrystalline magnetic core.
3) core section sum core dimensions is calculated; Described core dimensions is: 270*170*60*60, and namely core window area is 270*170, and core section amasss as 60*60.Meet the requirement of space and High-Voltage Insulation characteristic shared by the coiling of high-low pressure winding, and meet the powerful requirement of transmission.
4) the former vice-side winding number of turn is determined;
5) winding and principal and subordinate's insulating structure design;
6) high-low pressure Winding Design;
7) adjust core window area, if core window meets the demands, then perform step 8), otherwise get back to step 3);
8) calculate based on the copper loss under winding kelvin effect and proximity effect, if copper loss meets the demands, then perform step 9), otherwise get back to step 6);
9) calculate core loss, if core loss meets the demands, then perform step 10), otherwise get back to step 2);
10) employing particle swarm optimization take efficiency as the parameter optimization of target, if efficiency meets the demands, perform step 11), otherwise get back to step (4), majorized function is:
Wherein: n is the coil ratio of primary and secondary in transformer;
D is coil wire diameter;
B is the magnetic induction density of magnetic material;
for m inequality constrain condition, as by power limit wire diameter d to be more than or equal to certain value etc.;
for s equation is about condition, as the computing formula etc. of magnetic core active volume.
11) distribution parameter of transformer is determined;
12) Temperature Rise Analysis of transformer and heat dissipation design;
13) fuel tank size and cooling device is determined;
14) calculate temperature rise, specifically, the heat that iron loss and copper loss produce progressively raises first making the temperature of iron core and winding.At first, temperature rises very fast, but along with the rising of iron core and winding temperature, they just have certain temperature difference (crying again the temperature difference or temperature rise) to the heat eliminating medium (as oil or air) of surrounding, at this moment a part of heat just passes in surrounding medium and goes by winding and iron core, thus the medium temperature of surrounding is raised, now, because winding and some heat of iron core pass to surrounding medium, therefore the speed that self-temperature rises will slow down gradually.Through after a period of time, winding and iron core temperature finally reach steady state (SS), and no longer raise, and the heat that at this moment winding and iron core continue to produce will all fall apart in surrounding medium.This is just called thermal equilibrium state.
If transformer temperature rise meets the demands, continue next step, otherwise get back to step 12);
The heat loss through convection computing formula of transformer is:
In formula
Q1---temperature rise, K.
The heat loss through radiation computing formula of transformer is:
In formula
---when the temperature difference is 1 degree Celsius, by the heat that radiator per surface gives off;
The absolute temperature (K) of T1, T2---radiator and air or surrounding objects, i.e. T1=273+t1; T2=273+t2;
C---constant, relevant with the surface condition of radiating object,
.
Therefore, total heat dissipation capacity that can obtain transformer is:
In formula
---heat loss through convection amount;
---heat loss through convection area.
15) transformer Weight computation;
16) transformer outline dimensional drawing is drawn.
As shown in Figure 3, be the process flow diagram of the high frequency high voltage transformer optimization method based on particle swarm optimization, concrete steps are:
(1) the Particle Swarm parameter of definition for optimizing high frequency high voltage transformer, and initialization is carried out to Particle Swarm parameter, as given binding occurrence to m inequality constrain condition of high frequency high voltage transformer, give initialization value to s equality constraint;
(2) arrange Particle Swarm evolutionary generation gen be 50 and population scale size popsize be 200;
(3) the maximal rate max_velocity arranging Particle Swarm is 0.003;
(4) 0 matrix creating capable 8 row of popsize is initialization of population, wherein the 1st be classified as x-axis coordinate, 2nd is classified as y-axis coordinate, 3rd is classified as x-axis speed component, 4th is classified as y-axis speed component, the 5th x-axis coordinate being classified as personal best particle, the 6th y-axis coordinate being classified as personal best particle, 7th be classified as individual optimum just when, the 8th is classified as current individual adaptive value;
(5) each Particle Swarm fitness is evaluated;
(6) inertia weight and cognitive coefficient and coefficient of association are linked together, derive inertia weight
randomized policy be:
(7) individual history optimal location is calculated;
] (8) calculating colony history optimal location;
(9) upgrade Particle Swarm speed and position according to speed and location updating equation, the more new formula of particle speed and position is:
In formula
---Inertia weight factor;
C1, c2---positive aceleration pulse;
R1, r2---the random number between 0 to 1.
The speed of particulate and position update flow figure and schematic diagram are respectively as shown in Figures 4 and 5.
(10) judge whether end condition meets, if met, optimize and terminate, saving result, if do not met, turn back to step (5).
Claims (3)
1. a method for designing for high-frequency high-voltage transformer for electrostatic dust collection, is characterized in that: the method uses particle swarm optimization to be optimized high frequency high voltage transformer, comprises the following steps:
1) as requested, determine the former vice-side winding turn ratio, determine former secondary rated current;
2) core material and core structure form is selected;
3) core section sum core dimensions is calculated;
4) the former vice-side winding number of turn is determined;
5) winding and principal and subordinate's insulating structure design;
6) high-low pressure Winding Design;
7) adjust core window area, if core window meets the demands, then perform step 8), otherwise get back to step 3);
8) calculate based on the copper loss under winding kelvin effect and proximity effect, if copper loss meets the demands, then perform step 9), otherwise get back to step 6);
9) calculate core loss, if core loss meets the demands, then perform step 10), otherwise get back to step 2);
10) adopting particle swarm optimization to carry out with efficiency is the parameter optimization of target, if efficiency meets the demands, performs step 11), otherwise get back to step 4), majorized function is:
Wherein: n is the turns ratio of primary and secondary in transformer;
D is coil wire diameter;
B is the magnetic induction density of magnetic material;
P
lossindication transformer loss power;
G
j(n, d, b) <0 is m inequality constrain condition, is more than or equal to certain value by wire diameter d that power is limit;
H
j(n, d, B)=0 is about condition for s equation, the computing formula of magnetic core active volume;
Use particle swarm optimization to be optimized high frequency high voltage transformer, comprise the following steps:
(1) the Particle Swarm parameter of definition for optimizing high frequency high voltage transformer, and initialization is carried out to Particle Swarm parameter, as given binding occurrence to m inequality constrain condition of high frequency high voltage transformer, give initialization value to s equality constraint;
(2) Particle Swarm evolutionary generation gen and population scale size popsize is set;
(3) the maximal rate max_velocity of Particle Swarm is set;
(4) 0 matrix creating capable 8 row of popsize is initialization of population matrix, wherein the 1st be classified as x-axis coordinate, 2nd is classified as y-axis coordinate, 3rd is classified as x-axis speed component, 4th is classified as y-axis speed component, the 5th x-axis coordinate being classified as personal best particle, the 6th y-axis coordinate being classified as personal best particle, 7th be classified as individual optimum just when, the 8th is classified as current individual adaptive value;
(5) each Particle Swarm fitness is evaluated;
(6) inertia weight and cognitive coefficient and coefficient of association are linked together, derive the randomized policy of inertia weight ω;
(7) individual history optimal location is calculated;
(8) colony's history optimal location is calculated;
(9) Particle Swarm speed and position is upgraded according to speed and location updating equation;
(10) judge whether end condition meets, if met, optimize and terminate, saving result, if do not met, turn back to step (5);
11) distribution parameter of transformer is determined;
12) Temperature Rise Analysis of transformer and heat dissipation design;
13) fuel tank size and cooling device is determined;
14) calculate temperature rise, if transformer temperature rise meets the demands, continue next step, otherwise get back to step 12);
15) transformer Weight computation;
16) draw transformer outline dimensional drawing, complete design of transformer.
2. the method for designing of high-frequency high-voltage transformer for electrostatic dust collection according to claim 1, is characterized in that: described step 2) in, iron core material adopts the ultracrystalline magnetic core that 0.8mil is thick.
3. the method for designing of high-frequency high-voltage transformer for electrostatic dust collection according to claim 1, is characterized in that: described step 3) in, described core dimensions is: 270*170*60*60, and namely core window area is 270*170, and core section amasss as 60*60.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104317979B (en) * | 2014-08-20 | 2018-01-30 | 江苏科技大学 | High frequency high voltage transformer design optimization method based on genetic algorithm |
| CN104538166B (en) * | 2015-01-14 | 2016-08-31 | 泰州市鑫仪电器有限公司 | A kind of single-phase intelligent electric energy meter power transformer method for designing |
| CN105742047A (en) * | 2015-12-30 | 2016-07-06 | 国网智能电网研究院 | Control method for inductance parameter of high-frequency transformer body |
| CN106096106B (en) * | 2016-06-03 | 2019-04-23 | 江苏科技大学 | High-frequency high-voltage transformer for electrostatic dust collection optimum design method |
| CN106599488A (en) * | 2016-12-16 | 2017-04-26 | 保定天威集团特变电气有限公司 | Automatic transformer coil drawing method and system |
| CN108010701B (en) * | 2017-12-22 | 2019-12-06 | 中国科学院重庆绿色智能技术研究院 | non-standard design method for UI and UU type powder magnetic core chopping inductance |
| CN114785180B (en) * | 2022-05-26 | 2023-06-02 | 上海交通大学 | Micro-inverter magnetic element parameter optimization design method based on mode switching control |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0756294A1 (en) * | 1995-07-27 | 1997-01-29 | Motorola, Inc. | Mount for supporting a high frequency transformer over a component on a substrate in a hybrid module and method of assembling the hybrid module |
| CN101339839A (en) * | 2008-04-28 | 2009-01-07 | 镇江天力变压器有限公司 | High-frequency dust removing transformer |
| CN201181635Y (en) * | 2008-04-28 | 2009-01-14 | 镇江天力变压器有限公司 | High-frequency high-voltage dedusting transformer |
-
2013
- 2013-06-13 CN CN201310232699.XA patent/CN103310055B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0756294A1 (en) * | 1995-07-27 | 1997-01-29 | Motorola, Inc. | Mount for supporting a high frequency transformer over a component on a substrate in a hybrid module and method of assembling the hybrid module |
| CN101339839A (en) * | 2008-04-28 | 2009-01-07 | 镇江天力变压器有限公司 | High-frequency dust removing transformer |
| CN201181635Y (en) * | 2008-04-28 | 2009-01-14 | 镇江天力变压器有限公司 | High-frequency high-voltage dedusting transformer |
Non-Patent Citations (3)
| Title |
|---|
| 一种新型静电除尘用高频高压电源的设计;刘钰华 等;《电子设计工程》;20130131;第21卷(第1期);第107-113页 * |
| 改进粒子群算法及其在电力变压器优化设计中的应用;杜江 等;《山东电力高等专科学校学报》;20121231;第15卷(第6期);第1-5页 * |
| 箱变温升问题的解决;李春生 等;《电气制造》;20060131(第1期);第30-32页 * |
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