EPRI
Electric Power
Research Institute

42I8E(RP1318)	Utility: Consolidated Edison Company
Technology: Energy Analysis	
ELECTRIC UTILITY CORPORATE PLANNING MODEL (TELPLAN)
"Without TELPLAN, which allows integrated planning, and which provides a fast turnaround time, we just could not carry out our studies. There is not even a comparison with other systems."
Wayne A. Vanderschuere
Consolidated Edison Company of New York		

PROBLEM
In evaluating planning alternatives, electric utilities can no longer use simplified methods based on single measures such as discounted present worth of' revenue requirements. Rather, they must evaluate a number of often conflicting parameters such as sum present worth of revenue requirements, capital expenditures, cost of electricity, environmental impacts and fuel diversification. Though some computer-based models have been

developed and used by utilities, they have either not been comprehensive enough or too slow in turnaround time. About two years ago the Consolidated Edison Company of New York (Con Edison) identified the need for a rapid analysis model to evaluate a wide variety of scenarios for generation planning that could be integrated with financial, budgeting and environmental factors.

SOLUTION
In reviewing a variety of screening models, Con Edison planners found that the TELPLAN Integrated System Planning, Environmental and Financial Model which had been developed under EPRI contract (RP1318) by the TERA Corporation best matched their needs. TELPLAN, which uses state-of-the-art probabilistic seasonal production cost methods, simulates the power supply system, and integrates the results with an annual

financial simulation. It is also unique in its detailed treatment of pollution control regulations, technologies and emissions, and its fast turnaround time. Essentially machine-independent, it can be run on PRIME, VAX, CDC and IBM computers. With TELPLAN, Con Edison has been able to run literally hundreds of scenarios, analyzing a wide variety of total system parameters expeditiously.

BENEFITS
·	Using TELPLAN, Con Edison planners have conducted hundreds of simulations in the past two years. This degree of analysis would simply not have been possible using the traditional methods. Based on projected usage and on current experience with TELPLAN, Con Edison esti‑

mates that if traditional methods were to be used for comparable extensive integrated planning studies, it would probably cost approximately $200,000 per year more as compared to using TELPLAN simulations.