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One Df the Executive Committee's major activities during 1981 and 1982 was its investigation of pDssible solutions tD the loop flow problem (loop flDW is that component of scheduled power which naturally flows over transmission paths other than the transmission path on which it was scheduled). As a result of this activity an operating procedure has been developed which will e~hance the effective utilization of the region's most economic resources. This procedure has been adDpted by the Council for a one-year trial period. The Planning CDordination Committee is responsible for recommending system design criteria for the guidance Df the Member Systems, compiling and disseminating informatiDn pertaining to planned generation and transmissiDn facilities, and performing regional studies to assess the reliability of the interconnected system. Criteria which set forth desired system perfDrmance levels for various types of disturbances have been adopted to evaluate the adequacy of existing and planned facilities. The Planning Coordination CDmmittee recently cDmpleted development of criteria regarding system performance fDr the outage of DC lines. These criteria have been adopted by the Council and are included in the Council's planning criteria. A WSCC ten-year power flow and stability data bank is maintained by the Technical Staff as part of the Planning Coordination Committee's activities. The data bank and WSCC computer programs which are available for Member System use playa vital role in WSCC's cODrdinatiDn of system Dperation and planning. The data bank is utilized by WSCC and the Member Systems as a means to conduct studies and analyze the interactiDn of existing and planned facilities. The analysis Df study results provides for an overall adequacy and reliability assessment of the interconnected system. The results Df Member System studies are repDrted through annual progress reports submitted to WSCC regarding the planned generation and transmission facilities which are significant to the reliability of the bulk power system. This procedure provides early communication and a continual flow of information between Member Systems. As part of the Planning CDordinatiDn Committee's 1982 activities, well over 60 Council studies were conducted to assess the reliability of the existing and planned intercDnnected bulk pDwer system. These studies represent a small percentage of the numerous studies which are conducted annually by the individual Member Systems utilizing the Council's data bank. The Oserations Committee is charged with reviewing and analyzing operating proce ures and problems related tD the reliable operatiDn of the interconnected bulk power system. New or modified Dperating policies and procedures are recommended for the guidance of the Member Systems as may be required to maintain system reliability. Major cDntributions to system reliability include procedures for the voluntary reduction Df interchange schedules to prDvide relief from excessive loop flow and the implementation of system islanding schemes which minimize the adverse effects associated with severe contingencies. I I I I I I I I I I I .. I I I I I I 4 management of WSCC activities, including supervision of the Technical Staff.