Field Testing for Line Protection Schemes

Overcoming the Difficulties in Field Testing Series Compensated Line Protection Schemes !enton "an#iver $$$% Alexan#er Aostolov '$CR'( electronics Cor )*A 68th Annual Conference for Protective Relay Engineers Tx A&

12/28/15

 A+E(,A(without Time Information Agenda -

$ntro#uction Tra#itional Test etho#s et ho#s etho# Analysis an# *olutions Re.ote Test ,evices via (etor0 *eries Co. Case *tu#y *u..ary / Conclusions

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Introduction  *eries caacitors alie# to long " trans.ission lines is a roven technology for re#ucing the transfer reactance an# increasing loa#a3ility  The 0non si#e affect is the effective shortening of the aarent line length% .a0ing tra#itional #istance rotection .ore challenging to aly securely  This .eans the testing of these sche.es is li0eise co.licate#  ,istance relays i.le.ent secial sche.es for *eries Co.ensate# Protection #een#ing on the status of the caacitors 3eing 4in or out  They also utilie various signal filters for the transients that are generate#  Proving these sche.es has re7uire# ETP level #igital .o#els to roerly generate the internal an# external fault avefor.s  ull fiel# testing of these sche.es tyically re7uire# extensive use of EtoE C'TRA,E test cases an# .anual analysis9  :e use a case stu#y of a ;Ph ault N 1GL == ?f=E "erifie# ETP files Prefault% ault% ,C offset% ax currents for 3oth ter.inals *i.ulator tool .atche# to FF9M5L of analogs Correct relay sche.e oerations

Series Comp Case Stud# Test Case Co.arisons Re.ote En# ?+ *eries Co.% ;Ph ault N 1GL == ?f=E "erifie# ETP files Prefault% ault% ,C offset% ax currents for 3oth ter.inals *i.ulator tool .atche# to FF955L of analogs Correct relay sche.e oerations

0!TP vs Field Simulator Tool Co.aring results fro. start to finishH - The si.ulator tool as co.ara3le for 8F of F5 fiel# test cases9 ?F;9ML - o#el accuracy for calculate# values average# FF98L of ETP values9 - $f test cases ere li.ite# to nor.al co..issioning suite% ?6G tests the si.ulator tool oul# satisfy 1GGL of fiel# testing re7uire.ents9 - Continue# .o#el i.rove.ent an# a##ing transient aaratus resonse ill close the si.ulation ga for the fe 0non #eficiencies9 !ase# on utility #ocu.entation% .an>hours re7uire# for the tra#itional ETP .o#el #esign% C'TRA,E files generation% fiel# setu of the test e7ui.ent% coor#ination of the test execution% event/log file #onloa#s% an# ost analysis of co.aring the C'TRA,E files to event files an# final reort generation account for 1G #ays for ; TE@s9 ?;G .an>#ays The si.ulator tool tests erfor.e# re7uire# ; .an>#ays to setu% execute% analye% an# reort9 That reresents a savings of FGL9

Conclusions =everaging netor0 co..unication technologies an# recision ti.e fro. PTP ith a .o#ern softare alication oens a lot of ne ossi3ilities in the fiel# testing of co.lex rotection syste.s9 - The tester can si.ulate fault scenarios fro. a single integrate# alication an# calculate the inecte#4 min , min 7uantities for all ter.inals9 : min

- +P* ti.e sources via PTP netor0s can 3e near 2 min lug>n>lay for client test #evices% 3ri#ging even4 long min #istances into su3stations9  min :)4 h - o3ile co.uters ith $nternet access in the fiel# Bh can 3e use# to control re.ote test #evices ithout co.lex netor0 set>u9

Conclusions

-  A single softare alication can control .ultile test #evices via a netor0 connection% so that executing a synchronie# shot is as si.le as for a single> ter.inal test an# the results for all ter.inals are availa3le i..e#iately after9 4 min , min - urther i.rove# fiel# si.ulator .o#els can rovi#e ETP 7uality tests for co.lex oer syste. : min 2 min toologies9 4 min

-  A central control% synchronie# si.ulator tool ith  min netor0 access can rovi#e an or#er of .agnitu#e :)4 h re#uction in fiel# testing ti.e9 Bh

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