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The O~erations Committee is charged with reviewing and analyzing operating proce ures and problems related to the reliable operation of the interconnected bulk power system. New or modified operating policies and procedures are recommended for the guidance of the Member Systems as may be required to maintain system reliability. Major contributions to system reliability include procedures for the voluntary reduction of interchange schedules to provide relief from excessive loop flow, and the implementation of system islanding schemes which minimize the adverse effects associated with severe contingencies. During 1981 the committee approved revisions to the WSCC "Minimum Operating Reliability Criteria" and these revised criteria have been distributed to the WSCC Member Sys tems. I I I I 1 I I I 'I I 1 , I I 1 J 4 management of WSCC activities, including supervision of the Technical Staff. One of the Executive Committee's major activities during 1981 was its investigation of possible solutions to the loop flow problem (loop flow is that component of scheduled power which naturally flows over transmission paths other than the transmission path on which it was scheduled). A solution is being developed which addresses the institutional aspects and policy questions which in the past have prevented resolution of the problems caused by loop flow. The Planning Coordination Committee is responsible for recommending system design criteria for the guidance of the Member Systems, compiling and disseminating information pertaining to planned generation and transmission facilities, and performing regional studies to assess the reliability of the interconnected system. Criteria which set forth desired system performance levels for various types of disturbances have been adopted to evaluate the adequacy of existing and planned facil ities. A WSCC ten-year power flow and stability data bank is maintained by the Technical Staff as part of the Planning Coordination Committee activities. The data bank and WSCC computer programs which are available for Member System use playa vital role in WSCC's coordination of system operation and planning. The data bank is utilized by WSCC and the Member Systems as a means to conduct studies and analyze the interaction of existin9 and planned facilities. The analysis of study results provides for an overall adequacy and reliability assessment of the interconnected system. The results of Member System studies are reported 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 Coordination Committee's 1981 activities, well over 100 Council studies were conducted to assess the reliability of the existing and planned interconnected bulk power 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.