THE HISTORY OF THE PACI AND PDCI. 1948 POST WAR POWER SHORTAGES IN CALIFORNIA CAUSED BY DROUGHT LEAD TO DISCUSSIONS ABOUT A 230 KV INTERCONNECTION BETWEEN

THE HISTORY OF THE THE HISTORY OF THE PACI AND PDCI PACI AND PDCI

19481948

POST WAR POWER SHORTAGES POST WAR POWER SHORTAGES IN CALIFORNIA CAUSED BY IN CALIFORNIA CAUSED BY DROUGHT LEAD TO DROUGHT LEAD TO DISCUSSIONS ABOUT A 230 KV DISCUSSIONS ABOUT A 230 KV INTERCONNECTION BETWEEN INTERCONNECTION BETWEEN THE NW AND CALIFORNIA. THE NW AND CALIFORNIA. REGIONAL POLITICAL REGIONAL POLITICAL CONCERNS PREVENTED CONCERNS PREVENTED PROGRESSPROGRESS

19511951

DEVELOPMENT OF A NW-DEVELOPMENT OF A NW-CALIFORNIA INTERCONNECTION IS CALIFORNIA INTERCONNECTION IS DEEMED TO BE IN THE INTEREST OF DEEMED TO BE IN THE INTEREST OF NATIONAL SECURITY BY THE NATIONAL SECURITY BY THE NATIONAL DEFENSE NATIONAL DEFENSE ADMINISTRATION. ADMINISTRATION.

BPA STARTS DESIGN OF REDMOND-BPA STARTS DESIGN OF REDMOND-KLAMATH FALLS 230 KV LINE THAT KLAMATH FALLS 230 KV LINE THAT WOULD CONTINUE SOUTH TO WOULD CONTINUE SOUTH TO CALIFORNIA.CALIFORNIA.

19521952

HOUSE APPROPRIATIONS COMMITTEE HOUSE APPROPRIATIONS COMMITTEE DIRECTS THAT INTERTIE SHOULD NOT DIRECTS THAT INTERTIE SHOULD NOT BE BUILT UNTIL EXHAUSTIVE STUDY BE BUILT UNTIL EXHAUSTIVE STUDY HAS BEEN COMPLETED. HAS BEEN COMPLETED.

THIS KILLED THE INTERTIE. BPA WAS THIS KILLED THE INTERTIE. BPA WAS FORCE TO STOP CONSTRUCTION OF FORCE TO STOP CONSTRUCTION OF THE REDMOND-KLAMATH FALLS LINE THE REDMOND-KLAMATH FALLS LINE AND SELL THE MATERIALS AND RIGHT AND SELL THE MATERIALS AND RIGHT OF WAY FOR THE LINE AT COST TO OF WAY FOR THE LINE AT COST TO THE CALIFORNIA-OREGON POWER THE CALIFORNIA-OREGON POWER COMPANY (COPCO) WHICH LATER COMPANY (COPCO) WHICH LATER MERGED WITH PACIFIC POWER.MERGED WITH PACIFIC POWER.

19581958

THE RISING COST OF OIL AND A SLUMP THE RISING COST OF OIL AND A SLUMP IN THE ALUMINUM MARKET CREATE A IN THE ALUMINUM MARKET CREATE A NEW MOTIVATION FOR A NW-CA NEW MOTIVATION FOR A NW-CA INTERTIE.INTERTIE.

SENATE REQUIRES INTERTIE FEASIBILITY SENATE REQUIRES INTERTIE FEASIBILITY STUDY. STUDY.

MUCH PUBLIC CONCERN OVER MUCH PUBLIC CONCERN OVER REGIONAL PREFERENCE RIGHTS TO REGIONAL PREFERENCE RIGHTS TO POWER.POWER.

FORMER BPA CHIEF ENGINEER SOL FORMER BPA CHIEF ENGINEER SOL SCHULTZ HIRED TO REVIEW THE STUDY SCHULTZ HIRED TO REVIEW THE STUDY AND CONSIDERS IT TO BE TOO AND CONSIDERS IT TO BE TOO CONSERVATIVE.CONSERVATIVE.

19611961

THE SECRETARY OF THE SECRETARY OF INTERIOR FORMS A TASK INTERIOR FORMS A TASK FORCE LED BY BPA FORCE LED BY BPA ADMINISTRATOR CHARLES ADMINISTRATOR CHARLES LUCE TO DEVELOP AN LUCE TO DEVELOP AN INTERTIE PLAN.INTERTIE PLAN.

1961 Continued1961 Continued

TASK FORCE IDENTIFIES 3 TASK FORCE IDENTIFIES 3 OPTIONS:OPTIONS:1.1.THREE 750 KV DC LINESTHREE 750 KV DC LINES

2.2.THREE 500 KV AC LINESTHREE 500 KV AC LINES

3.3.THREE 345 KV AC LINESTHREE 345 KV AC LINES


THE DC LINE OPTION WAS THE DC LINE OPTION WAS CONTROVERSIAL BECAUSE IT CONTROVERSIAL BECAUSE IT WAS RELATIVELY NEW WAS RELATIVELY NEW TECHNOLOGY. TECHNOLOGY.

A DC LINE HAD BEEN IN A DC LINE HAD BEEN IN OPERATION SINCE 1954 IN OPERATION SINCE 1954 IN SWEDEN AND A DC LINK SWEDEN AND A DC LINK BETWEEN ENGLAND AND BETWEEN ENGLAND AND FRANCE HAD BEEN FRANCE HAD BEEN ENERGIZED IN 1961ENERGIZED IN 1961


COLUMBIA RIVER TREATY WITH CANADA COLUMBIA RIVER TREATY WITH CANADA IS SIGNED. THE TREATY FORMULATED A IS SIGNED. THE TREATY FORMULATED A PLAN TO DEVELOP THE UPPER PLAN TO DEVELOP THE UPPER COLUMBIA FOR FLOOD CONTROL, COLUMBIA FOR FLOOD CONTROL, INCREASED POWER PRODUCTION, AND INCREASED POWER PRODUCTION, AND ARRANGED TO SELL THE CANADIAN ARRANGED TO SELL THE CANADIAN POWER ENTITLEMENT (CANADA’S POWER ENTITLEMENT (CANADA’S NEGOTIATED SHARE OF THE NEGOTIATED SHARE OF THE DOWNSTREAM BENEFITS). DOWNSTREAM BENEFITS). – THE ORIGINAL GOAL WAS TO CONTROL THE THE ORIGINAL GOAL WAS TO CONTROL THE

RECORD COLUMBIA RIVER FLOW OF 1240 KCFS RECORD COLUMBIA RIVER FLOW OF 1240 KCFS (1894) TO 600 KCFS AT THE DALLES.(1894) TO 600 KCFS AT THE DALLES.


THE TREATY LED TO THE THE TREATY LED TO THE CONSTRUCTION OF THREE CONSTRUCTION OF THREE STORAGE DAMS IN CANADA STORAGE DAMS IN CANADA (DUNCAN, KEENLEYSIDE (ARROW), (DUNCAN, KEENLEYSIDE (ARROW), AND MICA). TO INCREASE THE AND MICA). TO INCREASE THE DOWNSTREAM BENEFITS, LIBBY DOWNSTREAM BENEFITS, LIBBY DAM AND THE THIRD DAM AND THE THIRD POWERHOUSE AT COULEE WERE POWERHOUSE AT COULEE WERE BUILT.BUILT.

THE TREATY SENT $254 MILLION THE TREATY SENT $254 MILLION TO CANADA TO BUILD DAMS IN TO CANADA TO BUILD DAMS IN EXCHANGE FOR 30 YEARS OF EXCHANGE FOR 30 YEARS OF DOWNSTREAM POWER BENEFITS.DOWNSTREAM POWER BENEFITS.


SIGNING OF THE COLUMBIA SIGNING OF THE COLUMBIA RIVER TREATY BROUGHT MORE RIVER TREATY BROUGHT MORE INTEREST IN A NW-CA INTERTIE INTEREST IN A NW-CA INTERTIE BECAUSE MANY UTILITIES HAD BECAUSE MANY UTILITIES HAD AN INTEREST IN GAINING AN INTEREST IN GAINING TRANSMISSION CAPABILITY TO TRANSMISSION CAPABILITY TO ACCESS THE CANADIAN ACCESS THE CANADIAN ENTITLEMENT WHICH CANADA ENTITLEMENT WHICH CANADA DID NOT NEED.DID NOT NEED.

19641964

INTERTIE PLAN FINALIZED INTERTIE PLAN FINALIZED WITH DESIGN FOR TWO 500 WITH DESIGN FOR TWO 500 KV LINES AND TWO 750 KV DC KV LINES AND TWO 750 KV DC LINES. LINES.

THE SECOND DC LINE TO THE SECOND DC LINE TO PHOENIX WAS NEVER BUILT.PHOENIX WAS NEVER BUILT.

HISTORY OF THE HISTORY OF THE PACIFIC AC INTERTIE PACIFIC AC INTERTIE (PACI) (PACI) 1966 - ONE 500 KV LINE OPERATED 1966 - ONE 500 KV LINE OPERATED

AT 230 KV BETWEEN MALIN AND AT 230 KV BETWEEN MALIN AND ROUND MT.ROUND MT.

12/1967 - 500 KV OPERATION OF 12/1967 - 500 KV OPERATION OF ONE LINE FROM NW TO CALIFORNIA.ONE LINE FROM NW TO CALIFORNIA.

SPRING 68 - COMMERCIAL SPRING 68 - COMMERCIAL OPERATION STARTED WITH 750 MW OPERATION STARTED WITH 750 MW LIMITLIMIT

SUMMER 1968 - 2ND 500 KV LINE SUMMER 1968 - 2ND 500 KV LINE FROM NW TO CALIFORNIA FROM NW TO CALIFORNIA COMPLETED WITH 1400 MW LIMITCOMPLETED WITH 1400 MW LIMIT

HISTORY OF THE PACIFIC HISTORY OF THE PACIFIC AC INTERTIE (PACI) Cont.AC INTERTIE (PACI) Cont.

1971 - LIMIT INCREASED TO 2000 1971 - LIMIT INCREASED TO 2000 MW WITH GENERATOR DROPPING MW WITH GENERATOR DROPPING RAS BUT WAS LATER REDUCED TO RAS BUT WAS LATER REDUCED TO 1800 MW DUE TO SERIES 1800 MW DUE TO SERIES CAPACITOR PROBLEMS ON PG&E’S CAPACITOR PROBLEMS ON PG&E’S PORTION OF THE PACI.PORTION OF THE PACI.

6/71 - FOUR CORNERS SEPARATION 6/71 - FOUR CORNERS SEPARATION SCHEME IMPLEMENTED WITH 97 SCHEME IMPLEMENTED WITH 97 RC RELAY AT FOUR CORNERS.RC RELAY AT FOUR CORNERS.


1972 - LIMIT RETURNED TO 2000 1972 - LIMIT RETURNED TO 2000 MW AFTER SERIES CAPACITOR MW AFTER SERIES CAPACITOR PROTECTION CHANGED.PROTECTION CHANGED.

6/72 - TRANSFER TRIP SCHEME 6/72 - TRANSFER TRIP SCHEME FROM GRIZZLY TO FOUR FROM GRIZZLY TO FOUR CORNERS FOR TOTAL PACI LOSS CORNERS FOR TOTAL PACI LOSS PLACED IN SERVICE. PLACED IN SERVICE.

– 97 RC RELAY WAS KEPT IN SERVICE 97 RC RELAY WAS KEPT IN SERVICE AS A BACKUP SCHEME TO THE AS A BACKUP SCHEME TO THE GRIZZLY TRANSFER TRIP SCHEME.GRIZZLY TRANSFER TRIP SCHEME.


1975 - PACI LIMIT INCREASED 1975 - PACI LIMIT INCREASED TO 2200 MW. TO 2200 MW. – PACI LIMITED BY 30 MINUTE PACI LIMITED BY 30 MINUTE

RATING OF SERIES CAPACITORS RATING OF SERIES CAPACITORS (2400 A) AFTER THE LOSS OF (2400 A) AFTER THE LOSS OF ONE PACI LINE NORTH OF MALINONE PACI LINE NORTH OF MALIN


1976 - MORE RAS ADDED TO 1976 - MORE RAS ADDED TO INCREASE PACI LIMIT TO INCREASE PACI LIMIT TO 2500 MW. 2500 MW.

– RAS ADDEDRAS ADDED BAKEOVEN AND FORT ROCK BAKEOVEN AND FORT ROCK

SERIES CAPACITOR INSERTION VIA SERIES CAPACITOR INSERTION VIA MALIN SLL RELAY MALIN SLL RELAY

NW GEN DROP FOR SINGLE LINE NW GEN DROP FOR SINGLE LINE OUTAGES.OUTAGES.


1982 - ADDITION OF 1982 - ADDITION OF MIDPOINT-MALIN 500 KV MIDPOINT-MALIN 500 KV LINE ALLOWS INCREASING LINE ALLOWS INCREASING PACI LIMIT TO 2800 MW.PACI LIMIT TO 2800 MW.

– PACI LIMITED BY 1600 A PACI LIMITED BY 1600 A STEADY STATE LIMIT OF STEADY STATE LIMIT OF WAPA’S MALIN SERIES CAPS WAPA’S MALIN SERIES CAPS ON ROUND MT. #1 LINE.ON ROUND MT. #1 LINE.

HISTORY OF THE PACIFIC HISTORY OF THE PACIFIC AC INTERTIE (PACI) Cont.AC INTERTIE (PACI) Cont. 12/22/82 - WIND STORM CAUSES LOSS 12/22/82 - WIND STORM CAUSES LOSS

OF PACI WHICH WAS CARRYING 2685 OF PACI WHICH WAS CARRYING 2685 MW.MW.– ARIZONA-CA INTERTIES ALSO TRIPPED IN ARIZONA-CA INTERTIES ALSO TRIPPED IN

RESPONSE TO THE PACI OUTAGE. RESPONSE TO THE PACI OUTAGE. – THE SEPARATION SCHEME WAS DELAYED THE SEPARATION SCHEME WAS DELAYED

OVER 2 SECONDS AND IS BELIEVED TO HAVE OVER 2 SECONDS AND IS BELIEVED TO HAVE CONTRIBUTED TO THE ARIZONA-CA TIES CONTRIBUTED TO THE ARIZONA-CA TIES TRIPPING. TRIPPING.

– A NUMBER OF RAS FAILURES CONTRIBUTED A NUMBER OF RAS FAILURES CONTRIBUTED TO THE SEVERITY OF THE DISTURBANCE. TO THE SEVERITY OF THE DISTURBANCE.

– THE DISTURBANCE REPORT RECOMMENDED THE DISTURBANCE REPORT RECOMMENDED THAT FUTURE PACI UPRATES NEED TO THAT FUTURE PACI UPRATES NEED TO CONSIDER THE RISKS CAUSED BY INCREASED CONSIDER THE RISKS CAUSED BY INCREASED POWER FLOWS.POWER FLOWS.


1983 - SIMULTANEOUS TRANSFER 1983 - SIMULTANEOUS TRANSFER PROBLEMS FROM NW AND PROBLEMS FROM NW AND ARIZONA INTO CALIFORNIA WERE ARIZONA INTO CALIFORNIA WERE IDENTIFIED WHILE STUDYING THE IDENTIFIED WHILE STUDYING THE UPRATE OF PACI TO 3200 MW. UPRATE OF PACI TO 3200 MW.


1985 - INCREASING THE STEADY 1985 - INCREASING THE STEADY STATE CAPACITY OF WAPA STATE CAPACITY OF WAPA SERIES CAPS AT MALIN TO 2400 SERIES CAPS AT MALIN TO 2400 A AND ADDITION OF THE A AND ADDITION OF THE BUCKLEY-SUMMER LAKE LINE BUCKLEY-SUMMER LAKE LINE INCREASES PACI CAPACITY TO INCREASES PACI CAPACITY TO 3200 MW.3200 MW.

– THE PACI WAS LIMITED BY 1800 A THE PACI WAS LIMITED BY 1800 A STEADY STATE LIMIT OF PAC’S STEADY STATE LIMIT OF PAC’S MALIN SERIES CAPS ON ROUND MT. MALIN SERIES CAPS ON ROUND MT. #2 LINE.#2 LINE.


1986 - THE PACIFIC AC 1986 - THE PACIFIC AC SIMULTANEOUS TRANSFER SIMULTANEOUS TRANSFER (PAST) COMMITTEE WAS (PAST) COMMITTEE WAS FORMED BY WSCC TO FORMED BY WSCC TO PERFORM SEASONAL STUDIES PERFORM SEASONAL STUDIES TO DETERMINE SIMULTANEOUS TO DETERMINE SIMULTANEOUS TRANSFER LIMITS INTO TRANSFER LIMITS INTO CALIFORNIA FROM THE NW CALIFORNIA FROM THE NW AND ARIZONA. AND ARIZONA. – NOMOGRAMS START BEING USED.NOMOGRAMS START BEING USED.

HISTORY OF THE PACIFIC HISTORY OF THE PACIFIC AC INTERTIE (PACI) Cont.AC INTERTIE (PACI) Cont. 1993 - ADDITION OF CAPTAIN JACK-1993 - ADDITION OF CAPTAIN JACK-

OLINDA-TRACY LINE (CALIFORNIA-OLINDA-TRACY LINE (CALIFORNIA-OREGON TRANSMISSION PROJECT) & OREGON TRANSMISSION PROJECT) & ADDITION OF SERIES CAPACITORS ON ADDITION OF SERIES CAPACITORS ON BUCKLEY-SUMMER LAKE AND SUMMER BUCKLEY-SUMMER LAKE AND SUMMER LAKE-MALIN LINES ALLOWS INCREASING LAKE-MALIN LINES ALLOWS INCREASING COI TO 4000 MW. COI TO 4000 MW. – BAKEOVEN SERIES CAPS REMOVED AND BAKEOVEN SERIES CAPS REMOVED AND

SERIES CAPS AT SAND SPRINGS, FORT ROCK, SERIES CAPS AT SAND SPRINGS, FORT ROCK, AND SYCAN ARE REPLACED WITH HIGHER AND SYCAN ARE REPLACED WITH HIGHER RATED CAPS. RATED CAPS.

– COI LIMITED BY DOUBLE LINE OUTAGE NORTH COI LIMITED BY DOUBLE LINE OUTAGE NORTH OF MALIN.OF MALIN.

COI IS A CALIFORNIA TERM FOR THE COI IS A CALIFORNIA TERM FOR THE COMBINED CAPABILITY OF THE PACI COMBINED CAPABILITY OF THE PACI AND THE CALIFORNIA-OREGON AND THE CALIFORNIA-OREGON TRANSMISSION PROJECT (COTP).TRANSMISSION PROJECT (COTP).


1994 - COMPLETION OF 1994 - COMPLETION OF DIXONVILLE-MERIDIAN LINE DIXONVILLE-MERIDIAN LINE CREATES FOURTH AC LINE CREATES FOURTH AC LINE NORTH OF MALIN AND NORTH OF MALIN AND ALLOWS INCREASING PACI ALLOWS INCREASING PACI TO 4800 MW.TO 4800 MW.


1996 -1996 - PDCI AT FULL 3100 PDCI AT FULL 3100 MW CAPABILITY WITH 4800 MW CAPABILITY WITH 4800 MW CAPACITY ON COI. MW CAPACITY ON COI. – HIGHER INTERNAL LOADING ON HIGHER INTERNAL LOADING ON

THE BPA SYSTEM DUE TO THE THE BPA SYSTEM DUE TO THE INCREASED CAPABILITY OF THE INCREASED CAPABILITY OF THE PDCI AND COI CREATE PDCI AND COI CREATE PROBLEMS NOT SEEN BEFORE.PROBLEMS NOT SEEN BEFORE.


6/96 - THE FOUR CORNERS 6/96 - THE FOUR CORNERS SEPARATION SCHEME IS SEPARATION SCHEME IS TAKEN OUT OF SERVICE FOR TAKEN OUT OF SERVICE FOR THE LAST YEAR OF A 3 YEAR THE LAST YEAR OF A 3 YEAR TEST PERIODTEST PERIOD– SCHEME WILL BE RETIRED IF NO SCHEME WILL BE RETIRED IF NO

COI N-3 OUTAGE OCCURS IN THE COI N-3 OUTAGE OCCURS IN THE NEXT YEAR.NEXT YEAR.


7/2/96 - DISTURBANCE IN IDAHO 7/2/96 - DISTURBANCE IN IDAHO CASCADES INTO AN OUTAGE OF CASCADES INTO AN OUTAGE OF THE COI. THE COI. – SIMULTANEOUS LOSS OF ALL THREE SIMULTANEOUS LOSS OF ALL THREE

COI LINES HAD PREVIOUSLY BEEN COI LINES HAD PREVIOUSLY BEEN THOUGHT TO BE A HIGHLY UNLIKELY THOUGHT TO BE A HIGHLY UNLIKELY EVENT. EVENT.

– THE COI WAS LIMITED TO 4000 MW N-STHE COI WAS LIMITED TO 4000 MW N-S– STUDIES DONE BY BPA OVER THE NEXT STUDIES DONE BY BPA OVER THE NEXT

MONTH INCREASES THE COI MONTH INCREASES THE COI CAPABILITY UP TO 4500 MW N-S.CAPABILITY UP TO 4500 MW N-S.

HISTORY OF THE PACIFIC HISTORY OF THE PACIFIC AC INTERTIE (PACI) Cont.AC INTERTIE (PACI) Cont. 8/10/96 - AN OUTAGE OF THE 8/10/96 - AN OUTAGE OF THE

KEELER-ALLSTON LINE CASCADES KEELER-ALLSTON LINE CASCADES INTO ANOTHER COI OUTAGE.INTO ANOTHER COI OUTAGE. – THE SOUTHERN ISLAND LOST THE SOUTHERN ISLAND LOST

APPROXIMATELY 7000 MW OF POWER APPROXIMATELY 7000 MW OF POWER FROM THE NW BUT LOST OVER 25,000 FROM THE NW BUT LOST OVER 25,000 MW OF LOAD.MW OF LOAD.

WSCC LIMITS COI & PDCI TO 3200 WSCC LIMITS COI & PDCI TO 3200 MW & 2000 MW RESPECTIVELY MW & 2000 MW RESPECTIVELY AFTER THE SECOND CASCADING AFTER THE SECOND CASCADING LOSS OF THE COI IN LITTLE MORE LOSS OF THE COI IN LITTLE MORE THAN A MONTH. THAN A MONTH.


THE WSCC BOARD OF TRUSTEES THE WSCC BOARD OF TRUSTEES REQUIRES THAT STUDIES REQUIRES THAT STUDIES JUSTIFYING INCREASING THE COI JUSTIFYING INCREASING THE COI AND PDCI TRANSFER CAPABILITIES AND PDCI TRANSFER CAPABILITIES MUST BE APPROVED BY REGIONAL MUST BE APPROVED BY REGIONAL CONSENSUS.CONSENSUS.

BLUE RIBBON PANEL FORMED BY BLUE RIBBON PANEL FORMED BY BPA TO RECOMMEND ACTION TO BPA TO RECOMMEND ACTION TO BE TAKEN BY BPA.BE TAKEN BY BPA.


3/97 - COI AND PDCI 3/97 - COI AND PDCI CAPABILITY INCREASED TO CAPABILITY INCREASED TO 3568 MW & 2682 MW N-S AS 3568 MW & 2682 MW N-S AS APPROVED BY THE WSCC APPROVED BY THE WSCC BOARD OF TRUSTEES. BOARD OF TRUSTEES. – STUDIES SUPPORTED 500 MW STUDIES SUPPORTED 500 MW

HIGHER TRANSFER CAPABILITY HIGHER TRANSFER CAPABILITY THAN APPROVED.THAN APPROVED.

HISTORY OF THE PACIFIC HISTORY OF THE PACIFIC AC INTERTIE (PACI) Cont.AC INTERTIE (PACI) Cont. LOTS OF CHANGES IN OPERATIONLOTS OF CHANGES IN OPERATION

– STUDY ASSUMPTIONS CHANGEDSTUDY ASSUMPTIONS CHANGED– SHUNT CAPACITORS ADDED AT JOHN SHUNT CAPACITORS ADDED AT JOHN

DAY AND HANFORDDAY AND HANFORD– RAS ADDITIONSRAS ADDITIONS– MONITOR REACTIVE RESERVESMONITOR REACTIVE RESERVES– MONITOR EQUIVALENT UNITSMONITOR EQUIVALENT UNITS– DEFAULT CURTAILMENT FOR DEFAULT CURTAILMENT FOR

UNSTUDIED OUTAGESUNSTUDIED OUTAGES– CONDENSOR CAPABILITY ADDED TO CONDENSOR CAPABILITY ADDED TO

UNITS AT JOHN DAY & THE DALLESUNITS AT JOHN DAY & THE DALLES


4/98 - COI & PDCI OPERATING 4/98 - COI & PDCI OPERATING CAPABILITY RESTORED TO CAPABILITY RESTORED TO FULL 4800 MW AND 3100 MW FULL 4800 MW AND 3100 MW N-S RATED CAPABILITY.N-S RATED CAPABILITY.

HISTORY OF THE PACIFIC HISTORY OF THE PACIFIC AC INTERTIE (PACI) Cont.AC INTERTIE (PACI) Cont. 12/98 - LATE 1998 THE RENO-ALTURAS 12/98 - LATE 1998 THE RENO-ALTURAS

PROJECT WAS COMPLETED WHICH PROJECT WAS COMPLETED WHICH ALLOWS 300 MW TO FLOW SOUTH TO ALLOWS 300 MW TO FLOW SOUTH TO RENO. RENO. – THE COMBINED FLOW ON THE COI AND THE COMBINED FLOW ON THE COI AND

NW/SIERRA PATH CANNOT EXCEED THE OTC OF NW/SIERRA PATH CANNOT EXCEED THE OTC OF THE COI.THE COI.

– SIERRA NEEDED PATH TO PROTECT AGAINST SIERRA NEEDED PATH TO PROTECT AGAINST LOSS OF MIDPOINT-HUMBOLDT 345 KV LINE LOSS OF MIDPOINT-HUMBOLDT 345 KV LINE AND INCREASE IMPORT CAPABILITY. AND INCREASE IMPORT CAPABILITY.

– BPA NEEDED ANOTHER PATH TO SERVE BPA NEEDED ANOTHER PATH TO SERVE GROWING LOAD IN WELLS AREA. CAPACITY TO GROWING LOAD IN WELLS AREA. CAPACITY TO SERVE WELLS LOAD VIA IPC’S SYSTEM WAS SERVE WELLS LOAD VIA IPC’S SYSTEM WAS LIMITED.LIMITED.

Documents

THE HISTORY OF THE PACI AND PDCI. 1948 POST WAR POWER SHORTAGES IN CALIFORNIA CAUSED BY DROUGHT LEAD TO DISCUSSIONS ABOUT A 230 KV INTERCONNECTION BETWEEN