Power loss calculations

Dear Guest,

Historical data aside. The individual customers may have a bad power factor and in most instances (at least here in the USA) individual meters DO NOT register this consumption ........... however ...... the utility company has meters that do register out of phase power. Users (at least in my area) are penalized for this and usually use capacitors to correct this problem. Industrial users can go the synchronous motor route as a second option. Mister CoGen Plant.

dear,

you need to install energy meters in all out going feeders at the source side, as well as ( at the consumer's side - which is always there )

difference is the losses.

Add to that, the transformer losses which come from the manufacturer;s test report.

Do I understand the following correctly?

1. The total gross power consumption of the project is metered by the power company.

2. The power consumption of individual users is metered at their sites.

3. There is a difference between the amount of power metered by the power company and the sum of the individual power meters, due to transmission losses and/or other factors.

4. You need a way to pass this difference onto the individual consumers in as equitable manner as possible.

Maybe this will work for you:

A. Calculate the difference (Power company meter vs. sum of individual meters; or Power company billing vs. sum of individual billings).

B. Spread the difference (the losses) among the consumers on a pro-rated basis. E.g. if you used 10% of the sum of individual metered power, you pay for 10% of the losses.

Just out of curiosity, where in Thailand are you working?

Cheeries !

Hi,

I live in Koh Samui. I am an American and have had my business in Thailand for over 18 years. Contrary to a post on this subject, Thailand Is Not a 3 rd World Country.

I have lived here 33 years and never judge peoples on how they chose to live. Just because they don't have a TV or telephone, chose to live in the way there family lived long ago does not make them poor.

Thanks for the comments and help, we have begun a review of KW usage and will have an avarage loss by this weekend.

Thanks

Farang

Koh Samui is a holiday island and can hardly be compared with true 'rural' Thailand when discussing power supply issues.

Numbers of TV's/telephones are not the way to determine "poor" although most Thai people have both. Thai's are one of the richest nations in the world. Not financialy, but by their very nature and way of life. Many farangs should take a lesson in courtesy and manners from that whilst having the priviledge of living here.

I too have lived in Thailand for approaching 22 years and have been responsible for the growth of many companies here, and the education of many now world class Engineers.

Companies operated by farangs on Samui such as TechWorX appear to be already capable of solving the basic question you originaly asked, maybe you should be consulting with them.

KennyT

The sole purpose of my request was to get other professional's inputs to possible new technology as well as experience that other may have had in this area.

After all I am a professional that values and appreciates the input of others.

That's fair enough, Pom-Kao-jai.

Chook-Dii Business.

KennyT

The term used was "Emerging Country" not "3rd World.

KennyT

As a "farang" why are you making it your business? Do you live in Thailand or just here to do a job and then go home, wherever that may be?

Before you try and pass the inefficiencies of the Thai power system on to the consumer you must first look at giving a decent service to that consumer.

Thailand is an emerging country and the people have enough to contend with at the moment without "farangs" interfering and trying to make a name for themselves at the daily living expense of the indigenous people.

First get the power system working efficiently, dont pass corporate inefficiency downstream.

KennyT

Your bulk supply tariff will be always lower than that the charged tariff to the consumers.

In Pakistan, Consumer on bulk supply is categorized as under;

Consumer of connected load 5000 KW or more fall in B4 tariff.

Consumer of connected load 500 KW < 5000 KW fall in B3 tariff

Consumer of connected load 40 KW > 500 KW fall in B2 tariff

Consumer of connected load > 40KW fall in B1 tariff

If you observe rate per KWH (Unit), it seems that

B1 tariff is higher than tariff B2

B2 tariff is higher than tariff B3

B3 tariff is higher than tariff B4

Your selling tariff should cover the cost of all energy charges, power losses and operational and maintenance cost.

A good efficient system for houses (colony) is observed 98%-99% (which means the power loss is less than 2%).

Capacitor will increase your power factor ultimately reduction in apparent current results in reduction of power loss (copper losses).

Give the argument to the management that there is no power distribution system without power loss even on unity power factor.

You sum the individual meters in the development. To calculate the efficiency you divide the sum by the main meter reading. To calculate the losses subtract the sum from the main.

If the losses are greater than one would expect for line and transformer loses then it would be reasonable to expect that extra-ordinary losses are occurring.

In a public forum I do not wish to discuss how such losses occur, suffice it to say that they do. Explaining to the honest, metered customer that they are expected to pay for these ordinary and extra-ordinary losses is the heart of your problem. If the people do understand, then, they will be furious. In this country we ignore the problem, so the problem does not exist. Officially, there is no problem, people accept that explanation!