WSP06539

• File Number: 8220.100.50
• Description: CRSP - Power Issues
• Basin: Colorado Mainstem
• Date: 1/1/1983
• Author: West. Sys. Coord. Co
• Title: Western Systems Coordinating Council Ten-Year Coordinated Plan Summary 1983- 1992
• Water Supply Pro - Doc Type: Publication

The electric utility industry continues to face econDmic
uncertainties, regulatDry delays, environmental challenges, and other
factors which affect system planning and operation, and therefore
coordination and mutual support among the WSCC Member Systems must be
maintained tD promote a reliable interconnected bulk power system.
CDntinued delays in obtaining the necessary apprDvals for construction of
planned transmission facilities will result in the need to operate the
existing transmission system closer to its maximum capability, thus

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52

A copy of the map titled "WSCC Planned Facilities Through 1992
and Possible Transmission Beyond This Period" is included in the Appendix.
The existing network as of January I, 1983 is illustrated in black and
significant facility additions planned for the 1983-1992 period are
depicted in color. Parenthetical numbers on the map indicate system
ownership as defined in the legend and anticipated in-service dates of
planned transmissiDn are generally indicated near the facility.

The planned transmission additions for the WSCC region through
1992 reflect a continuing interest in the development and strengthening of
interconnections to enhance system reliability, to transfer hydro and
coal-fired energy to Dil-burning areas, tD increase the capability for
economy transfers, and to enable diversity exchange of pDwer between areas
with different seasonal peak load and ener9Y requirements. The
installation of DC links in New Mexico in 1984 and 1985, in Southeastern
MDntana in 1985, and in Nebraska in 1987 will enable the transfer of power
between WSCC and two adjacent Councils -- Southwest PDwer Pool and
Mid-Continent Area Power Pool. New intercDnnections frDm Southern
CalifDrnia to MexicD are scheduled to be placed in service cDmmencin9 in
1983. In effect, the WSCC system is being developed tD insure the
efficient and econDmical utilizatiDn Df reSDurces and at the same time
insure adequacy, reliability and envirDnmental compatibility.

Figures 14 and 15 illustrate WSCC intra and interregional
transfer capabilities for the 1983 and 1988 summer heavy load conditions,
respectively. The transfer capability limits illustrated in Figures 14
and 15 represent the total capability of the various interconnections of
the existing system and the planned 1988 system. It should be recognized
that the transfer capability of an interconnectiDn is not a single value
as it is dependent upon system cDnditions. Each transfer capability
depicted in Figures 14 and 15 has been determined fDr a specific system
condition.

Transfer capabilities between the WSCC areas are generally
adequate tD accommodate the existing and anticipated firm interchange
schedules. However, prDblems persist in accommodating all desired
economy/surplus power transfers. The current level of available eCDnomy
energy has resulted in transmission lDadings at Dr near transfer
capability limits a large percentage of the time. The benefits associated
with maximizing the exchange of economy energy are described in the Energy
SDurces and FDssil Fuel sectiDn Df this report. In SDme instances
additional dependence has been placed Dn remedial measures to enable
increased power transfer levels. EffDrts are underway to construct needed
transmission in key 10catiDns to maximize the efficient use of the
regiDn's generating resources and maintain system reliability.