Reliability Analysis of Distribution Automation on Different Feeders

Transcription

1 Bofrg Iteratoal Joural of Power Systems ad Itegrated Crcuts, Vol., Specal Issue, December 20 2 Relablty Aalyss of Dstrbuto Automato o Dfferet Feeders C. Bhargava, P.S.R. Murthy ad V. Krsha Murthy Abstract--- Automatg a dstrbuto system s a effectve me to provde a more relable ad ecoomcal system the ft growg techologcal world. Ths paper delvers to automatg a system usg two- stage restorato (partal automato ad put forward a feeder automato system bed o substato automato platform that ca be appled to electrcal dstrbuto systems for hgh ecoomc-techcal effcecy. Improved relablty s evaluated whe feeder automato s appled to dstrbuto. Ths paper studes three dfferet feeders ad decdes o the most probable relable feeder amog them. Keywords--- Relablty Evaluato, Dstrbuto Automato, Partal Automato or Two Stage Restorato, Optmum Placemet of Swtches, Feeder Automato. A I. INTRODUCTION Power system h a umber of geeratg statos of dfferet types tercoected by a system of trmsso les, sub trmsso les ad dstrbuto etworks to supply dfferet types of loads to varous cosumers. Dstrbuto system s that part of a electrcal power system whch s dedcated to delverg electrc eergy to the cosumer. The dstrbuto system makes use of the dstrbuto substato, prmary feeder, dstrbuto trformer (DTR ad dstrbuto feeder to supply electrc power to the cosumers.[7] Due to the cree techology customers are expectg more relable ad ecoomc power from the supplers. Relablty ca be creed by decreg the terruptos. Dstrbuto Automato (DA s the techque whch s used to reduce the terruptos from dstrbuto system. Whe compared to tradtoal system DA s more expesve. To satsfy relablty, cost costrats partal automato ca be used. II. RELIABILITY INDICES Relablty ca be evaluated ad aalyzed usg Relablty Idces. The relablty dces clude load pot dces ad overall system dces. [], [7] The load pot dces are: Average falure rate λ (f/yr C. Bhargava, Departmet of Electrcal ad Electrocs Egeerg, Sreedh Isttute of Scece ad Techology, Hyderabad, Adhra Pradesh- Ida P.S.R Murthy, Drector, School of Electrcal Egeerg, Sreedh Isttute of Scece ad Techology, Hyderabad, Adhra Pradesh-Ida V. Krsha Murthy, Departmet of Electrcal ad Electrocs Egeerg, Sreedh Isttute of Scece ad Techology, Hyderabad, Adhra Pradesh-Ida Average outage tme r (hr Average aual outage tme U (hr/yr Eergy ot suppled ENS (kwh/yr Formulae used to calculate Relablty Idces A. Load Pot Idces: ( 2... m ( λ j = average falure rate (r r2 2. rm m/ rj j/, j r (2 U = r λ ( U = average aual outage tme B. System Idces S.A.I.F.I.: System Average Iterrupto Frequecy Idex s the average umber of terruptos that a customer would experece = Total umber of customer terruptos Total umber of customers served N N S.A.I.D.I: System Average Iterrupto Durato Idex s the average outage durato for each customer served, ad s calculated Sum of all customer terrupto duratos Total umber of customersserved UN N C.A.I.D.I.: Customer Average Iterrupto Durato Idex s calculated ( j ( ISSN Bofrg

2 Bofrg Iteratoal Joural of Power Systems ad Itegrated Crcuts, Vol., Specal Issue, December 20 Sum of all customersterrupto duratos Total umber of customer terruptos SAIDI SAIFI (7 A.S.A.I.: Average Servce Avalablty Idex ( N *870 ( UN ( N*870 E.N.S.: Eergy Not Suppled A.E.N.S.: Alterate Eergy Not Suppled (8 U *00 (9 Where U=system uavalablty λ=system falure rate N=umber of cosumers U *00 N (0 III. TWO STAGE RESTORATION Two stage restoratos (partal automato s the combato of both automated ad o automated swtches. I a two-stage restorato strategy, a frst stage quckly restores a lmted set of customers usg automated swtches. A later stage restores addtoal customers usg maual swtches.[2][5] IV. CASE STUDY ON DIFFERENT TYPES OF DISTRIBUTION SYSTEMS A. Aalyzg Urba Feeder: System Descrpto Cosder a / KV Urba radal dstrbuto system whch cossts of crcut breakers, feeders, sectoalzg swtches, ormally ope te-swtch, 9 dstrbuto trformers wth 2550 customers wth a overall average load cosumpto of.7mw. The relablty of ths system s sessed ad a most feble system s proposed. The urba feeder s show Fgure 2. Fgure : Flow Chart V. CASE STUDY ON DIFFERENT TYPES OF DISTRIBUTION SYSTEMS A. Aalyzg Urba Feeder System Descrpto Cosder a / KV Urba radal dstrbuto system whch cossts of crcut breakers, feeders, sectoalzg swtches, ormally ope te-swtch, 9 dstrbuto trformers wth 2550 customers wth a overall average load cosumpto of.7mw. The relablty of ths system s sessed ad a most feble system s proposed. The urba feeder s show Fgure 2. The etwork data ad customer data of urba feeder are show from the TABLE I, TABLE II. ISSN Bofrg

3 Bofrg Iteratoal Joural of Power Systems ad Itegrated Crcuts, Vol., Specal Issue, December 20 Fgure 2: Dstrbuto System Urba Feeder Table : Network Data of Urba Feeder Compoets Legth Avg f λ(f/yr Load Pot Table 2: Load Data of Urba Feeder Avg Load No. Of Customers avg f (or λ(f/yr LP LP LP LP LP LP LP LP LP LP LP LP LP LP LP LP LP LP LP B. Feeder Modelg ad Evaluato Ths paper descrbes the relablty evaluato of a utlty etwork for the followg dfferet radal dstrbuto etwork cofguratos. Wthout Automato of swtches Wth Automato of swtches Partal Automato of swtches Optmum placemet of swtches ad ts automato ISSN Bofrg

4 Bofrg Iteratoal Joural of Power Systems ad Itegrated Crcuts, Vol., Specal Issue, December 20 5 Table : Comparg the Results of all Combatos of Urba Feeder Swtches (MMMM MAAA,,5,,8 (AAAMM 2,5,,7,8 (AAAMM,2,,,7 (MMAAA,,,5,7 (MMAAA Swtches SAIDI CAIDI ASAI ENS AENS Ce Ce2 Ce Ce Fgure : Comparso o Combatos of Urba Feeder C. Aalyzg of Rural Feeder System Descrpto Cosder a / KV Rural radal dstrbuto system whch cossts of crcut breakers, feeders, sectoalzg swtches, ormally ope te-swtch, 2 dstrbuto trformers wth 22 customers wth a overall average load cosumpto of 72.0 MW. The relablty of ths system s sessed ad a most feble system s proposed. The urba feeder s show Fgure. Fgure : Dstrbuto System Rural Feeder The etwork data ad customer data of rural feeder are show from the TABLE IV, TABLE V. Table : Network Data of Rural Feeder Compoets Legth Avg f λ(f/yr Table 5: Load Data of Rural Feeder Load Pot Avg No. of avg f (or Load Customers λ(f/yr LP LP LP LP LP LP LP LP LP LP LP LP LP LP LP LP LP LP LP LP LP D. Feeder Modelg ad Evaluato Ths paper descrbes the relablty evaluato of a utlty etwork for the followg dfferet radal dstrbuto etwork cofguratos. ISSN Bofrg

5 Bofrg Iteratoal Joural of Power Systems ad Itegrated Crcuts, Vol., Specal Issue, December 20 Wthout Automato of swtches Wth Automato of swtches Partal Automato of swtches Optmum placemet of swtches ad ts automato Table : Comparg the Results of all Combatos of Rural Feeder Swtches (AAMMMA,,,5, (AMMAA,2,,5, (AAMMA,2,,5, (AAMMA,2,,, (AAMMA,2,,,5 (AMMAA Swtches SAIDI CAIDI ASAI ENS AENS Ce Ce2 Ce Ce Ce5 Fgure 5: Comparso o all Combatos of Rural Feeder E. Aalyzg of Idustral Feeder System Descrpto Cosder a / KV Idustral radal dstrbuto system whch cossts of crcut breakers, feeders, sectoalzg swtches, ormally ope te-swtch, 2 dstrbuto trformers wth 2 customers wth a overall average load cosumpto of 0.207MW. feble system s proposed. The dustral feeder s show Fgure. Table 7: Network Data of Rural Feeder Compoets Legth Avg f λ(f/yr The relablty of ths system s sessed ad a most Fgure : Dstrbuto System Idustral Feeder ISSN Bofrg

6 Bofrg Iteratoal Joural of Power Systems ad Itegrated Crcuts, Vol., Specal Issue, December 20 7 Table 8: Load Data of Idustral Feeder Load Pot Avg Load No. Of avg f (or Customers λ(f/yr LP LP LP LP LP LP LP LP LP LP LP LP LP LP LP LP LP LP LP LP LP LP LP LP LP LP LP LP LP LP LP F. Feeder Modelg ad Evaluato Ths paper descrbes the relablty evaluato of a utlty etwork for the followg dfferet radal dstrbuto etwork cofguratos. Wthout Automato of swtches Wth Automato of swtches Partal Automato of swtches Optmum placemet of swtches ad ts automato Table 9: Comparg the Results of all Combatos of Idustral Feeder Swtches (AAMMM AMM,2,5,,8 (AAMAM,2,,5,8 (AAAMM,,5,,8 (AAMAM,2,,,7 (AAMMA SAIDI CAIDI ASAI ENS AENS Swtches Ce Ce2 Ce Ce Fgure 7: Comparso o all Combatos of Idustral Feeder Table 0: Comparg the Relablty of Feeders URBAN RURAL INDUSTRIAL SAIFI SAIDI CAIDI ASAI ENS AENS % ENS before % ENS DA after DA VI. CONCLUSION Ths paper h examed the mpact of partal automato o relablty of dstrbuto system. It h descrbed the optmal placemet of swtches eeded to evaluate relablty of automated dstrbuto system of dfferet three feeders. Whe compared to the fully automato, the partal automato s ecoomcal. The relablty aalyss shows that two- stage automato s a effectve me to reduce the outage durato. The system relablty h creed cosderably by automatc servce restorato. Wth the mplemetato of the two- stage restorato o dfferet feeders amely Urba, Rural ad Idustral feeders the Eergy ot suppled wll be decreed ce of dustral feeder due to less terruptos durato. It h show that dustral feeders are hghly relable compared to urba ad rural feeders. ACKNOWLEDGMENT I express my scere thaks to Dr. V. Vudeva Rao, Prcpal ad Dr. P. Narmha Reddy, Drector of SREENIDHI INSTITUTE OF SCIENCE & TECHONOLOGY, Ghatkesar for gvg me a opportuty to do ths paper work. REFERENCES [] Fahme Tehooee Asr, Ahad Kazem Modelg the Impact of a Automated ad Cotrol o the Relablty Dstrbuto System IEEE Electrcal Power & Eergy Coferece [2] Rchard E. Brow, Member, IEEE ad Adrew P. Ho, Impact of Two-Stage Servce Restorato o Dstrbuto Relablty - Member, IEEE ISSN Bofrg

7 Bofrg Iteratoal Joural of Power Systems ad Itegrated Crcuts, Vol., Specal Issue, December 20 8 [] Dstrbuto System Relablty Through Recofgurato, Fault Locato, Isolato Ad Restorato - Prof. P. M. Sowae, Prof. D. P. Kadam, Prof. Dr. B.E. Kushare, Member IEEE [] [Extreme Adverse Whether Modelg I Trmsso Ad Dstrbuto System Relablty Evaluato -R.Bllto, C.Wu, G.sgh [5] Dstrbuto Automato IEEE Trtoral Course -Prepared by IEEE Workg Group o Dstrbuto Automato [] Power Dstrbuto system Relablty- Practcal Methods ad Applcatos, IEEE press seres o Power Egeerg - Al A. Chowdhury Do O. Kova [7] Relablty evaluato of radal dstrbuto system for dfferet automato testy levels [8] S. R. Gllga, A method for estmatg the relablty of dstrbuto crcuts, IEEE Tr. Power Delvery, vol. 7, o. 2, pp. 9 98, Apr.992. [9] G. Kjolle ad K. Sad, RELRAD A aalytcal approach for dstrbuto system relablty sessmet, IEEE Tr. Power Delvery, vol. 7, o. 2, pp , Apr [0] IEEE Workg Group o System Desg, Tral use gude for power dstrbuto relablty dces, IEEE, Report P, 998. [] Bllto, R., ad e, R.N.: "Relablty evaluato of power systems"(pleum Press, 99, 2d ed. [2] He, Y., Soder,L., ad e,r.n.:"dstrbuto automato :mpact of commucato system o relablty of automatc cotrol,.proc. Power Tech.,200, Porto, vol. [] R. N. e,r. Bllto, ad M. F. De Olvara, "A effcet algorthm for deducg the mmal cuts ad relablty dces of a geeral etwork cofgurato ", IEEE Tr. O relablty, Vol. R-25, No.,Oct. 97. [] S. Kazem, M. Fotuh-Fruzabad ad R. Bllto, " Relablty Assessmet of a Automated Dstrbuto System ", IET Geer. Trm. Dstrb., 2007,,(2,pp [5] Pahwa, A,: " Role of dstrbuto automato restorato of dstrbuto systems after emergeces ", IEEE Tr. O relablty, Vol. 2, pp C.Bhargava receved B.Tech from kakatya uversty ad M.Tech from JNTU kakada. He s presetly workg a Asst. Professor the Departmet of Electrcal ad Electrocs, Sreedh Isttute of Scece ad Techology, Hyderabad, Adhra Pradesh-INDIA. He s pursug hs PhD Dstrbuto Automato at JNTU Hyderabad. Hs research terest s the area of dstrbuto automato system, power systems. P.S.R.Murthy receved Doctorate from Igg.(Germay ad power system ad cotrol. Presetly he s workg Drector, School of Electrcal Egeerg, Sreedh Isttute of Scece ad Techology, Hyderabad, Adhra Pradesh-INDIA. Hs research terest s the area of dstrbuto automato system, smart grds, power qualty. V.Krsha Murthy receved B.Tech ad M.Tech from Osmaa Uversty, Hyderabad. He h 7years of Idustral experece (Idustral Drves. He s presetly workg a Asst. Professor the Departmet of Electrcal ad Electrocs, Sreedh Isttute of Scece ad Techology, Hyderabad, Adhra Pradesh-INDIA. Hs research terest s the area of dstrbuto automato system, power systems. ISSN Bofrg