How to get unity power factor in three phase rectifier by hysteresis current controller

2015 6 20
5 个回答
更新时间：2015 7 28
11 次查看（30 天）

回答（5 个）

Purushottama Rao
Purushottama Rao 2015-6-20

0 个投票

Steps: 1) Sample the input line voltage signal. Use a PLL for syncronization, the output of which is a unit mag sinusoidal signal inphase with the line voltage. 2) Prepare the ref current. This can be obtained by multiplying the required curret rms value with the PLL output. 3) Measure the input current 4) Calculate the error between the above two currents 5) Define a hystresis controller with the defined hystersis level. Relay block in simulink does this for you. Hystersis limits defines the switching frequency and THD. 6) Pass the output from hystersis to the switches directly.
It should give you the required output. ALL THE VERY BEST

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Anees Ansari
Anees Ansari 2015-6-20
sir, i have done same thing which u mentioned in your comments but sir, i didn't get unity power factor, can you provide me the simulation block or any images of that block by that i check what mistake i have done on my simulation circuit
Purushottama Rao
Purushottama Rao 2015-6-22
I propose to have your model or a print screen of it to fix it.
Anees Ansari
Anees Ansari 2015-6-24
sir,this diagram i took from ieee paper plz suggest me that what i did a mistake for not getting unity power factor

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Anees Ansari
Anees Ansari 2015-6-24

0 个投票

sir,this diagram i took from ieee paper plz suggest me that what i did a mistake for not getting unity power factor
Anees Ansari
Anees Ansari 2015-6-24

0 个投票

sir,this diagram i took from ieee paper plz suggest me that what i did a mistake for not getting unity power factor

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Purushottama Rao
Purushottama Rao 2015-6-25
编辑：Purushottama Rao 2015-6-25
Dear Anees, Thanks for the info. Picture was not clear especially the lower power part Below the diode bridge.I would like to see what is there inside it?
I could not find any return path other than the diode bridge for the phase current. Gv more details. Share your model for better help
Anees Ansari
Anees Ansari 2015-7-14
sir i am sending u my project please cheak it why it is not showing unity power factor
if true
% code
end
Anees Ansari
Anees Ansari 2015-7-14
sir, can u give me ur email id i will send u on email matlab desigm program here it is not paste

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