Load management alternatives to transmission and distribution construction: Toledo-Wren case study

Abstract

This is a report on the Conservation in Lieu of Construction (CILOC) study which was a task in the Customer System Efficiency Improvement (CSEI) Assessment Project. This project was conducted by Pacific Northwest Laboratory (PNL) for the Office of Conservation, Bonneville Power Administration (BPA). The principal objective of the CSEI Project was to assess the potential for, and impacts of, conservation in the BPA service area. The objectives of this CILOC study were to first develop, and then apply, a methodology to examine the potential for direct load control to defer the construction of additional transmission and distribution capacity needed to accommodate load growth in a given area. These two objectives were first met by synthesizing two pieces of software, Loadcalc and Microcast,(a) and applying the resultant forecasting model to a test case. This test case considered the plan to add a 230 KV reinforcement line between Toledo and Albany, Oregon. This case allowed the testing and evaluation of the methodology developed in the first phase of the study. The CILOC methodology was based on the end-use forecasting approach incorporated in the Loadcalc and Microcast systems. However, neither piece of software was capable of performing the analysis required in this study. Both included questionable underlying assumptions. Some important problems ; i i CENTRAL LINCOLN CATALOG NUMBER CENL.ETC-001 CENL.ETC-002 CENL .ETC-003 CENL.ETC-004 CENL.ETC-005 CENL.ETC-006 CENL.I-007 CENL.ETC-008 CENL.ETC-009 CENL.ETC-010 CENL.ETC-011 CENL.ETC-012 CENL.RCI-013 CENL.ETC-014 CENL.ETC-015 CENL.ETC-016 CENL.ETC-017 CENL.R-018 ABBREVIATED CATALOGUE OF HOLDINGS TITLE BPA Form 980 of 6-82 Load & Sys. Plans •ys-'98 Financial Statements 12/83; 7/84 System loads by Delivery Pts 1983 Space & Water Heat Saturations Questions for Utilities CENL Proposed Industrial Conservation Acquisitions BPA Wholesale Bill (8-22-85) Load Estimate Review (3-29-85) for '84

Peak load management: Potential options

“…Conservation at this level of cost appears to be viable as an ATT option. Similarly, the supply curves PNL potential costing less than I cent/kWh (Tepel et al 1987;De Steese et al 1987). In view of this, there appears to be value in considering the CSEI potential of the following options (in order of expected value) applied specifically to the three PUD systems: The principal value of these analyses will be to establish the value of the best CSEI measures as ATT options and, therefore, for the first time, to create an ability to rank such options in priority against load management measures.…”

“…The ATT model known as the C!LOC Code, developed previously by The Pacific Northwest Laboratory (PNL) for BPA (Englin et al 1987), will be used in this study. The model estimates the potential of specific conservation and/or load management (C&LM) measures to reduce or delay the need for new transmission and distribution {T&D) construction required when load growth occurs in part of the system.…”