Power Quality Improvement using Unified Power Quality Conditioner Mr. Sidhhant N. Patil 1 AndMr. Suhas M. Shembekar 2

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1 Power Quality Iproveent usin Unified Power Quality onditioner Mr. Sidhhant N. Patil 1 AndMr. Suhas M. Shebekar 2 1,2 M.. Scholar And Assistant Professor, lectrical, SSBT S OT Babhori, North Maharashtra University Jalaon, (M.S.), India Abstract-The electricity supply plays an iportant appearance in the econoic developent and technoloy advanceent throuhout the world. The quality and reliability of power supplies relates closely to the econoic rowth of a country. The ain ai of the utility syste is to supply the power to load with proper sinusoidal wave of the voltae and current, with fixed frequency and anitude with less total haronic distortion as possible accordin to I standard. Our power syste consist of any non-linear loads like electric arc furnaces, power electronic convertors etc. which offer current and voltae haronics. Also the loads like coputers, icro-controllers are sensitive loads; their convenient functionin depends upon the quality of power supplied. However, power quality disturbances such as haronics, voltae ibalance,sas, swells, flicker etc., create a lot of probles in achievin a reliable and quality power supply. To overcoe these probles, power electronics based FATS devices are used in distribution systes. Reliability of supply and power quality are two ost iportant look of any power delivery syste today. For providin reliable and reliable power, proposed UPQ based iproveent in Power Quality is the dissertation topic. UPQ is effective in copensation of current, haronics, reactive power and to iprovin the power quality of the distribution syste. Keywords:FATS, UPQ, PQ, PWM, SPWM. I. Introduction Now a days copetition level is ore elevate in industrial sector so all industries are eneratin ass of production in short duration. This is possible due to usin fast response devices. So in ost of the industries are used electronic devices, adequate sensitive devices and electronic drives. These are devices very iportant to disturbances and becoe less forivin to power quality probles. It is ost iportance issue. lectrical distribution systes should be provide their custoers with an uninterrupted enery at tolerated anitude level and frequency but, in practice, electrical distribution systes widely used the distribution nonlinear loads their ipact on the quality of power supplies[1]. As an outcoe of the nonlinear loads the cleanliness of the wavefor of supplies is lost. So to avoidin such power quality probles and to developed solution is desperate need of the industrial sector and hence in this project is developed new effective solution which helps to itiate power quality probles [2]. What do we ean power quality? Power quality is the interaction between electrical power and electrical equipent. If electrical equipent operates properly with reliably, we could say that the electrical power is ood quality. If the electrical equipent alfunctions, unreliable, we could say that the power quality is poor quality. Power quality is a set of electrical boundaries that rant a exaple of equipent to function in its desin anner without iportant loss of perforance or life expectancy [3]. This definition rasps two thins that we interest fro an electrical device perforance and life expectancy. The Synchronization in voltae frequency and phase rant electrical systes to function in their intended anner without iportant loss of perforance or life [4]. Now days power quality probles are lare issue in all over the world in which Dereulation between voltaes supplied fro the electric power syste and end use equipent. Most coon power quality probles in electrical power syste such as voltae sas, swells, All rihts Reserve 26

2 Volue 03, Issue 03, [March 2016] ISSN (Online): ; ISSN (Print): overvoltae, transients, voltae unbalance, under voltaes interruptions, flickers and haronics etc. [5,6]. Voltae swell is ost severe disturbances to equipent s in the industrial process zone [7]. It is suarized that voltae sas are caused by faults in electrical rids, the startin of lare loads such as induction otors or transforer enerizin. It is a coon reason for failures or alfunctions of power electronics based equipent s that are used widely in odern day power systes. The characteristics of these voltae sas depends on various factors of which the otor ratin, rotor structure, the ethod of startin otor and syste s power supply capacity are seen as critical ipacts [8]. Utilities and end users can cause voltae sa on transission and distribution power systes. The transforer failure is an exaple can be the initiatin event that causes a fault on the utility electrical power syste that result in voltae sa.these faults link enery fro the power syste [11]. Voltae sas occurs while the fault is on the utility s electrical power syste. As soon as the breaker or reclose clears the fault the voltae returns to noral. Transission line disturbancescause voltae dips that last about 6 cycles or 0.10 second. Distribution faults last larer than transission faults while lare otor loadscan cause voltae sas on utility s and end user s power systes. If opare to other power quality probles poinant industrial and coercial end users voltae sas occur ost frequently [12]. II. Unified Power Quality onditioner Unified Power Quality onditioner (UPQ) ainly consists of two paraeters: (i) Shunt Active Power Filter (Shunt APF) and (ii) Series Active Power Filter (Series APF). UPQ is the interation of shunt and series active power filters, connected back-to-back on the dc side, sharin a coon D capacitor as shown in Fi.1.1. The series coponent of the UPQ is used to overcoe or itiation of the supply side disturbances such as voltae sas/swells, flicker, voltae unbalance and haronics. It inserts voltaes so as to aintain the load voltaes at a desired level with balanced and distortion free. The shunt coponent is used to overcoe or itiatin the current quality probles caused by the consuer such as poor power factor, load haronic currents, load unbalance etc. It injects currents in the ac syste such that the source currents becoe balanced sinusoidal and in phase with the source voltaes. Fi. 1.1 Basic confiuration of proposed All rihts Reserve 27

3 Volue 03, Issue 03, [March 2016] ISSN (Online): ; ISSN (Print): III. ontroller of UPQ A ulti-level converter is proposed to increase the converter voltae operation, avoidin the series connection of switchin eleents. However, the ultilevel converter is coplicated tofor the output voltae and desire an excessive nuber of back-connection diodes or flyin capacitors or cascade converter. A basic structure of ulti-level unified power quality conditioner is shown in fi.1.2 Injection Transforer LOAD A Supply Source P D Link Series APF Shunt APF PWM ontroller Reference Sinals Fi. 1.2 Unified power quality conditioner with controller arraneent In p-q theory instantaneous active and reactive powers are derive, while, the d-q theory close with current independent of the supply voltae. Both ethod transfor voltae and current fro abc frae to stationary reference frae (p-q theory) or synchronously rotatin frae (d-q theory) to separate the haronics and fundaental quantities. In this ethod the atin sinal for seiconductor switches of unified power quality conditioner based on derive copensatin coands in ters of voltae or current. Then, these copensatin coands are iven to pulse width odulation control technique. In this project synchronous reference frae theory are used to abc-dq0 transforation are describe below; Where the inverse of park s transforation atrix is iven by cos sin 1 = cos 2 3 sin cos sin Fi. 1.3 MATLAB/Siulink based block diara of All rihts Reserve 28

4 Volue 03, Issue 03, [March 2016] ISSN (Online): ; ISSN (Print): Followin is coposition propose odel of insulated ate bipolar transistor based voltae source inverter in atlab Siulink usin above concept. The inverter paraeter are desined IGBT based, 3-ar, 6-pulse and carrier frequency are 2 khz. 4 +ve + - v Vinj v 1 R + - v Injected Voltae 1 Pulses1 IGBT/Diode 5 -ve node 10 2 Y Filter 3 B Fi. 1.4 Voltae source inverter in atlab Siulink Sr. No. Table 1.1 Syste paraeter of unified power quality conditioner Syste Standards Quantities 1 Source 3-phase, 33 kv, 50 Hz 2 Source Ipedance R = 4 oh, L = H Z = 0.1 oh, wt = Inverter Paraeter IGBT Based, 3-ar, 6-pulse, arrier Frequency = 2 khz 4 PID ontroller K P = 0.20, K i = 0.02, K d = Transforer 1 10 MVA, 33 kv,50 Hz 6 Transforer 2 10 MVA, 33 kv/66 kv, 50 Hz 7 Line Ipedance R = 4 oh, L = Z = 4.00 oh, wt = ! 8 RL Load R = 500 oh, L = ! H IV. Perforance Analysis The odelin of UPQ in at lab environent for electrical network is shown in Fi.4. in which a one feeder of Power transission and distribution is considered and siulated. The siulation results are perfored on basis of that network for the perforance of UPQ. The fault is created anually for soe period and various results durin such conditions are carried All rihts Reserve 29

5 Volue 03, Issue 03, [March 2016] ISSN (Online): ; ISSN (Print): Fi. 1.5 Matlab siulation odel of UPQ in transission network V. Siulation Result Followin are siulations results of the proposed odel of unified power quality conditioner custo power copensation device by usin SPWM techniques in MATLAB software. The siulation is carried out and result is analyzed for voltae sa period and ratin of the RL load. Fi.1.6 Voltae across source side, injected voltae, copensated voltae across load, All rihts Reserve 30

6 Volue 03, Issue 03, [March 2016] ISSN (Online): ; ISSN (Print): Fi.1.7 Source side voltae THD VI. onclusion The power quality probles in distribution syste are not new but custoer alertness of these probles recently increased. It is very difficult to aintain electric power quality at sufficient liits. One odern and very briht solution that deals with both load current and supply voltae iperfection is the unified power quality conditioner (UPQ). The objective of this paper is to iprove the power quality in an electrical network usin UPQ FATS device. The siulation is carried out by SPWM control technique. Fro this paper and siulation results it is clear that the perforance in the voltae profile or wavefor et iproved usin UPQ. References [1] T. Zhili, L. Xun,. Jian, K. Yon, Z. Yan, A new control stratey of UPQ in three-phase four wire syste, in proc. I power lectron. spec. onf., pp , Jun 17-21, [2] V. Khadkikar, A. handra, A new control philosophy for a unified power quality conditioner (UPQ) to coordinate load-reactive power deand between shunt and series inverter, in I tranc. On power delivery, vol.23, no.4, October [3] D. Graovac, V. katic, A. Rufer, Power quality copensatin usin universal power quality conditionin syste, in I Tranc. Power delivery, vol.8, no.2, pp , Apr [4] I. Axente, J. Ganesh. M. Basu, M. onlon, and K. Gauhan, A12-KVA DSP-ontrolled laboratory prototype UPQ capable of itiatin unbalance in source voltae and load current, in I Tranc. On power lectronics, vol.25.no.6, June [5] B. Gopal, Pannala Krishna Murthy and G. N. Sreenivas, A Review on UPQ for Power Quality Iproveent in Distribuation Syste, Global Journal of Researches in nineerin lectrical and lectronics nineerin, Volue 13, Issue 7, Version 1.0, [6] Payal Deshpande, Ait Shrivastava and Anula Khare, Different Modelin Aspects and nery Syste of Unified Power Quality onditioner (UPQ): An Overview, International Journal of Renewable nery Research, Vol.3, No. 2, [7] Byun-Moon Han, Bo-Hyun ho, Seun-Ki Sul and Jae-on Ki, Unified Power Quality onditioner for opensatin Voltae Interruption, Journal of lectrical nineerin and Technoloy, Vol. 1, No. 4, pp , [8] Haeed Mohaed Abdul and P.V.Kishore, Multi onverter Unified Power-Quality onditionin for Multi Feeder Syste, International Journal of nineerin Research and Application, Vol. 2, Issue 1, Jan-Feb 2012, pp [9] Vinita Vasundhara, Rintu Khanna and Manoj Kuar, Iproveent of Power Quality by UPQ usin Different Intellient ontrols: A Literature Review, International Journal of Recent Technoloy and nineerin, Volue-2, Issue-1, March [10] B. Jyothi, B. Jyothsna and Dr. M. Venu Gopal Rao, Analysis of Unified Power Quality onditioner durin Voltae Sa and Swell onditions, International Journal of nineerin Science and Advanced Technoloy, Volue-2, Issue-1, 85-91, Jan-Feb [11] Mr. Shaktisinh N. Gohil and Prof. M. V. Makwana, A coparative Analysis of UPQ for Power Quality Iproveent, Journal of Inforation Knowlede and Research in lectrical nineerin, Volue-02, Issu-02, Nov 12 to Oct 13. [12] Metin Kesler and nin Ozdeir Synchronous-Reference-Frae-Based ontrol Method for UPQ Under Unbalanced and Distorted Load onditions, I Transaction on industrial lectronics, Vol. 58, No.9, Sep [13] N. Hari, K. Vijaykuar, S. Dash, A versatile control schee for UPQ for power quality iproveent, I onference proceedins of ITT [14] H. Hinorani, Introducin usto Power I Spectru, Vol.32, Issue: 6, Pae(s): 41-48, June All rihts Reserve 31

7 Volue 03, Issue 03, [March 2016] ISSN (Online): ; ISSN (Print): [15] G. Siva Kuar, P. HarshaVardhana and B. Kalyan Kuar, Miniization of VA Loadin of Unified Power Quality onditioner (UPQ), onference on POWRNG 2009 Lisbon, Portual, Pae(s): , [16] V. Khadkikar, A. handra, A.O. Barry and T.D Nuyen, onceptual Study of Unified Power Quality onditioner (UPQ), I International Syposiu on Industrial lectronics, Vol. 2, Pae(s): , [17] V. Khadkikar, A. handra, A.O. Barry and T.D. Nuyen, Power quality enhanceent utilizin sinle-phase unified power quality conditioner: diital sinal processor-based experiental validation onference on Power lectronics, Vol. 4, Pae(s): , [18] A. Mokhtatpour and H.A. Shayanfar Power Quality opensation as Well as Power Flow ontrol Usin of Unified Power Quality onditioner, Asia- Pacific Power and nery nineerin onference (APP), Pae(s): 1-4, All rihts Reserve 32