[SOLVED] Three Phase Wireless smart energy meter using ADE7754 chip

[Naveed Ahmed]

Hello dears!

I have designed three phase wireless energy meter using ADE7754 chip. I have calculated all the parameters voltages, currents, active power, apparent power, active energy, apparent energy, frequencies, power factor etc.

But ADE7754 has limitation that it does not calculate Reactive power. There is a method of getting reactive power sign in this chip but it is not working properly.

If i get the sign of reactive power that will help me to calculate the reactive power using power triangle method.

Can we find the sign of reactive power using this IC???

Thanks in advance.


Regards
Naveed Khowaja

 

[bobcat1]

Re: Three Phase Wireless smart energy meter using ADE7754 ch

HI

I n order to get accurate measurement from this IC you will need to calibrate it

Other wise you will get false result - folow the ADE7xxx application note to learn how to calibrate the it.

To get reactive measurement - you will need to do calculation in the host processor
And to use floating point calculation (depend on the processor used) or to convert the calculation to integers (a bit of a hard work)

All the best

Bobi

The microcontroller specialist

 

[Naveed Ahmed]

Re: Three Phase Wireless smart energy meter using ADE7754 ch

Thanks for interest Bobi!

Yes! for calibration I am referring AN624 application note, and for floating point conversions I am using IEEE754 standard of 4 bytes.

As much as Reactive power is concerned, it can be found as

Reactive power= (sign of Reactive power)* √(Apparent power)²-(Active power)²

But the problem is to get the sign, or to know about the load whether it is inductive or capacitive. to know about the phase shift whether it is positive or negative.

??

Thanks


Regards
Naveed Khowaja

 

[alberto1683]

Re: Three Phase Wireless smart energy meter using ADE7754 ch

Hallo Naveed,
Now we can communicate trough this Post. So others students can see the replies.


Best Regards,
Alberto

 

[pisces12]

Re: Three Phase Wireless smart energy meter using ADE7754 ch

hi naveed..
im interested in your project...
can have the schematic and anythng that related with the project and maybe some explanation..
really need your cooperation...
tq..

regards,
pisces

 

[Naveed Ahmed]

Re: Three Phase Wireless smart energy meter using ADE7754 ch

Good Piscis,

ADE7754 is a three phase energy meter IC, That communicates using SPI protocol. What is ur application??


Naveed

 

[omara007]

Hi folks

I am currently doing a market research on a new electronic design / product. The product starts from the semiconductor level upwards.The following survey consists of only 8 straight forward questions with multiple choice answers. I would appreciate if you undertake it for me.

The survey link is : https://www.surveymonkey.com/s/XV62KDS

If you find any problem doing the survey, please let me know.

Regards

 

[bobliin]

Hi naveed,

if you r still looking for an answer:

The sign of Reactive Energy can be directly read from the LVARENERGY. The sign of LVARENERGY indicates inductive or capacitive loading

chao

 

[Naveed Ahmed]

I used LAENERGY register to accumulate the reactive energy by setting to Logic 1 Bit 5 of the WAVMode register(Address 0Ch), this is how I detected the sign of reactive load. Further I used the following relation.

Reactive power= (sign of Reactive power)* √(Apparent power)²-(Active power)²

Thx,

Naveed