C I R E D 22 nd International Conference on Electricity Distribution Stockholm, 10-13 June 2013 Paper 1029 CIRED2013 Session 2 Paper No 1029 LABORATORY POWER QUALITY STUDY OF AIR CONDITION SYSTEMS INDIVIDUALLY AND SIMULTANEOUSLY WITH COMPACT FLUORESCENT LAMPS (CFL) S.EHTERAMI M. JAMEIFAR A. SALEMNIA M.T.DEHKORDI Ahwaz Power distribution co Ahwaz Power distribution co Power and water university of technology National Iranian Oil Co. Ehterami_77@yahoo.com Mostafajameifar@yahoo.com salemnia@pwut.ac.ir M_Torabian2001@yahoo.com ABSTRACT: Khuzestan is one of the warmest provinces of Iran in which the air condition systems, i.e. window coolers and split coolers, are used over than nine month in year by the consumers. The lighting consumption is the second category of dominated consumption in Khuzestan. In recent years the CFL 1 , known as nonlinear loads, are widely used by the consumers. Therefore, the study of power quality indices of this equipment is useful. In order to study the power quality of air condition systems, ten kinds of widely used window and split coolers in warm climate areas are considered in laboratory and the measured current harmonics of them are compared with the corresponding standard. Furthermore the power quality of different kinds of CFL in short term (ten minute) is measured and their current harmonics are compared with the corresponding standard of lighting equipment. Then the power quality indices of simultaneously using of CFL and air condition systems, both window and split coolers, are studied. The results show that the THDi 2 of air condition systems are low and its highest value is 26.4%. It should be mentioned that THDi of split coolers is more than window coolers. When the CFL are considered with the air condition systems, the amount of the current harmonic of this combination may violate the standard limit. In this respect, if the portion of CFL in combination with split coolers and window coolers reach to 9.7% and 15.6% respectively, the amount of the current harmonic violate the standard limit. 1. INTRODUCTION Khuzestan province is located in the warm moist air from the south west of Iran. The electrical consumption is determined with two kind of climate regimes consist of warm and cold weather conditions. The studies show the ambient air temperature plays main role in variation of electrical demand in compare with other climate indices such as humidity wind speed, barometric pressure and etc As shown in table1 in the first half of the year more than 73% of the number of hours, the temperature is over 30°c and 94% over a period of hours, the air temperature is higher than 20°c. If the desired air temperature ranges from 20°c to 30°c, consumers should use the air condition systems at least 73% and maximum 94% of the time in the first half of year (warm period). 1 Compact fluorescent lamps 2 Total current Harmonic Distortion Table 1- Yearly Khuzestan temperature classification from 2004 to 2012 Temperature Classification °c Time of the first half % Time of the second half % 0-10 0 15.7 11-20 5.1 49.3 21-30 21.6 26.2 31-40 50.4 8.8 41-50 22.9 0 Air condition systems are the major part of electrical consumption in tropical areas like Khuzestan province. This load is almost constant and continuous but changes based on ambient temperature and relative humidity variations. In recent years the air condition systems specially split type widely used by the consumers so consideration of their features and effects on distribution network in compare with other types is inevitable. The lighting equipment is also a part of electrical consumption. The CFL, known as nonlinear loads, are widely used by the consumers. Therefore study of power quality of these equipment especially current harmonic indices and power factor is necessary. Order to evaluate power quality of air condition systems, ten kinds of widely used window and split air conditions in warm areas are considered in libratory and the current harmonics measured and compared with the corresponding allowable limit. Laboratory study of power quality of cooling systems Pre-discussed samples has been evaluated in laboratory using a power quality analyzer model 3196 HIOKI in a short term of time (10 minutes) and recorded power quality indices. Then these values compared with standard ranges. Permissible harmonic current limit based on NO.6375-2 institute of standard and industrial research of Iran for odd and even orders are presented in table 2. Table2- Permissible harmonic current limit in cooling equipment Max. of permissible harmonic current(A) Order of harmonic (h) Max. of permissible harmonic current(A) Order of harmonic (h) 2.3 3 1.08 2 1.14 5 0.43 4 0.77 7 0.3 6 0.4 9 h 8 23 . 0  40  h  8 0.33 11 0.21 13 h 15 15 . 0  15 h 39 In this paper 8 number of split air condition systems and 2 number of window types with shown rated specifications in table 3 were investigated. The measurements were carried out at ambient temperature between 46°c to 50°c on August 2011 in Ahvaz.