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Utilities invited to test transmission modeling tool In building a renewable energy project, the big questions facing developers and utilities alike are, where are the best resources, how do we deliver the energy to our load and how much will it cost. The Western Renewable Energy Zone (WREZ) initiative is compiling data and designing analytical tools to answer those questions, and you have the opportunity to help. In cooperation with Western and the National Renewable Energy Laboratory (NREL), the WREZ project is presenting a webinar on how to use its new generation and transmission modeling tool (GTM), Aug. 19, 2009, at 11 a.m. MDT. The GTM allows users to evaluate the relative economic costs, including transmission, of delivering renewable energy from proposed sites to load centers. The cost of the webinar is free, and Paula Fronk urges Western customers to participate. “This is an amazing tool that removes much of the guesswork from figuring out whether or not a specific renewable energy project will work in the utility’s situa- tion,” explained the Western Energy Services representative. Jerry Vaninetti, co-chair of the modeling team and vice president of transmission developer Trans-Elect, said the GTM will also encourage collaboration between power provid- ers in the West. “The model can show utilities where they can team up to achieve economies of scale on larger transmission lines needed to reach remote resources,” he explained. “Sharing development and transmis- sion costs could give them access to rich sites that wouldn’t be available to individual utilities. Such partnerships could ultimately bring down the cost of renewable energy to customers.” Feedback from training The WREZ committee hopes the training session will encourage utility planners, renewable energy develop- ers, environmental groups, policy makers and others to “test drive” the GTM and offer feedback on possible improvements. Webinar participants will get a thorough introduction to the 2.0 version of the modeling tool that is currently online. The GTM is an Excel-based screening tool that offers users a list of resources to select or the option of creating a resource. Users then choose pre-defined transmission lines and routes to deliver the energy to load zones. The program calculates a variety of transmission characteristics to give users the delivered price of power from a specific renewable energy zone (REZ). Users can modify inputs such as transmission line capacities and capital costs, right-of-way costs, substation capital costs, operation and maintenance costs and transmission losses to evaluate different scenarios Fronk believes that the model’s flexibility will be a boon to utilities going through the integrated resource planning (IRP) process. “Up to now, our customers could only estimate the cost of adding renewable resources to their portfolios, or spend a lot of time researching markets,” she said. “With the GTM, they can plug in their own numbers to quickly get a more precise picture of how a particular resource fits their needs. This tool could streamline planning and make IRPs more accurate, so it is important for our customers to be a part of its development.” Feedback from webinar participants will provide the modeling team with more insight on the needs of utility users, said Jeff Hein of the Colorado Public Utilities Commission. The staff professional engineer and commission energy advisor is on the WREZ techni- cal committee and part of the model- ing team. “The GTM is especially The Phase 1 Report from the Western Renewable Energy Zone initiative contains maps used in developing the generation and transmission modeling tool. (Art by Western Governors’ Association) useful in that it marries generation and transmission planning, and these are areas where utilities have extensive day-to-day experience,” he said. The release of GTM 2.0 marks the end of the second phase of the WREZ initiative, but the model will be periodi- cally updated. “We’ll be incorporating feedback from users and adding new resource data as it becomes available,” Hein said. “Like any good program, the GTM will continue to evolve.” Renewable future The Western Governors’ Association (WGA) and the Department of Energy launched the WREZ initiative in May 2008. Building on the work of WGA’s Clean and Diversified Energy initiative, the goal of WREZ is to encourage development of the abundant renew- able resources within the Western Interconnection. See TRANSMISSION MODELING TOOL page 8 Energy Services Bulletin August 2009 5PDF Image | Ox Mountain Landfill gas-to-energy (LFG) plant
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