i want know about hormonics

I assume you mean harmonics. Now harmonics in what is the next question.

Start here, then maybe you can come back if you still have questions.

[PDF]

HARMONICS - Understanding the Facts

If you want to know about harmonic in electrical system. Read below topics.

http://ecmweb.com/searchresults/?ord=r&terms=harmonic&rp=ecmuniversity%2Cecmweb

The non-linear loads such as Charger, Converter, VFD, UPS, Computers, Electronic Ballasts, Electronic appliances, Welding supplies etc. causes Harmonic current. If more than 20% of loads are non-linear, then noticeable harmonics are introduced in the system. The effects of harmonic current can be the overheating of transformers, cables, motors, generators and capacitors connected to the same power supply with the devices generating the harmonics. Electronic displays and lighting may flicker, circuit breakers can trip, computers may fail and metering can give false readings.

See this link for the details of the harmonics:

http://cr4.globalspec.com/thread/51441

- MS

Every teenager is eager to learn about hormonics.

Especially the raging type.

Let me add some more information for you.

Loads

1-Single phase non-linear loads have a current distortion, THD, around 120 %. All odd harmonics exist in the current spectrum.
2-
Three phase non-linear loads have a current distortion, THD, up to 200 %. All odd harmonics exist in the spectrum, except triplen harmonics.
3-
Fundamental voltage unbalance supplying three phase non-linear loads causes non-zero sequence triplen harmonic currents.
4-
The design of the DC-link has a strong influence on the current distortion and on the sensitivity for voltage background distortion and fundamental voltage unbalance.
5-
The current distortion for industrial non-linear loads can include even and interharmonics. The distortion can also be fluctuating.
6-
Current interaction between single and three phase non-linear loads reduces the total distortion.
7-
Background voltage distortion, caused by single phase non-linear loads, reduces the current distortion from these loads

The system

1
The low order voltage and current harmonics, below order 19, are present at all voltage levels. The distortion is lowest at high voltage levels, below 2 % voltage and 5 % current distortion.
2-
The main, global, source of the distortion is the use of television receivers at evening time, at all voltage levels. The dominating voltage harmonics are the 5:th and the 7:th. Locally at any voltage level, other sources can contribute more, e.g. industrial loads,
HVDC-links.
4-
The use of capacitor banks and harmonic filter affects, except from the fundamental voltage and current components, the voltage and current distortion. Resonance at expected, and at not expected, frequencies is present. Filtering the background voltage distortion of an overlaying voltage level can be present due to
series resonance at lower voltage levels. This was found for the 7:th harmonic voltage at the 130 kV level and for the 13:th harmonic voltage at the 400 kV level.
5
The HVDC-links near Gothenburg caused dominating 11:th and 13:th harmonic voltages at the 400 kV level at the transformer station in Timmersdala, about 150 km from the HVDC stations.
6-
Long line resonance, harmonic current interaction due to difference of the fundamental voltage phase angle between nodes, and meshed systems makes the voltage and current distortion very complex at higher voltage levels.
7-
Fundamental voltage unbalance, around 0.8 % negative sequence, was present at 130 and 400 kV levels.
8-
The harmonic active power flow in the monitoring point is small, below one tenth of a percent of the fundamental power flow, at higher voltage levels. At low voltage level, close to the terminals of a television receiver, the flow was around 1.7 %.

9-
The harmonic active power flow in a monitoring point, at higher voltage levels, does in most cases not represent the harmonic losses in the down stream system.
11-
Reduction of the harmonic losses with harmonic filters, in the
study in chapter 5, was not motivated due to high financial investment costs for the filters.

Reference: CHALMERS UNIVERSITY OF TECHNOLOGY Göteborg, Sweden