Western Interconnection Data Sharing Agreement

A balancing authority (BA) or control zone, usually composed of large and small transmission owners, is the responsible unit, which compares loads with resources within the system, maintains planned exchanges between control areas, maintains frequency within reasonable limits and provides sufficient production capacity to maintain operating reserves. Data on the load and resources transmitted by BA to WECC are used to identify areas that could lead to electricity shortages. Western Interconnection is the geographic area comprising the synchronized electrical grid in western North America, which includes parts of Montana, Nebraska, New Mexico, South Dakota, Texas, Wyoming and Mexico, as well as all of Arizona, California, Colorado, Idaho, Nevada, Oregon, Utah, Utah, Created in 2002 by the Western Systems Coordinating Council (WSCC) and two regional transmission associations, THE WECC comprises the entire Western interconnection and covers more than 1.8 million square kilometres. WECC members, representing all segments of the electrical industry within the Western interconnection, provide electricity to 71 million people in 14 western states, two Canadian provinces and part of a Mexican state. It long-distance planning needed to provide a reliable and affordable electrical service. Due to the large and specific features of the region, WECC members face unique and difficult problems in coordinating daily network and source operations: WECC Regional Planning Project Review, Loads and Resources Working Group, Demand Analysis of 2015 Scenarios To Explore the Range of Need for a Canada/Pacific Northwest to Northern California Line-October 2007 The map below shows an example of a weCC electricity flow scenario. Northwest Power Pool Area (NWPP) Rocky Mountain Power Area (RMPA) Arizona-New Mexico-Southern Nevada Power Area (AZ/NM/SNV) California-Mexico Power Area (CA/MX) Data from the four different Reporting Areas (or sub-reporting areas) NERC regions as has been shown) enable weCC to carry out the mission and carry out four organizational roles: Total Existing and Planned Generation – Because temperature and seasonal events can radically influence generation and needs. evaluation of the different scenarios. Scenarios are divided into classes to determine existing production, variations in production and needs, the status and impact of planned production inflows, and the status and impact of planned transportation projects. NERC`s eight regional units include the 48 neighbouring states and parts of Canada and Mexico. Red Zone – less than 15% green zone reserve margin – more than 15% reserve margin White Zone – 15% reserve margin Red line – Loaded path towards arrow-green line – Partly loaded path to the arrowless green line – Path without proper feed flow – In accordance with the requirement, THE WECC conducts a seasonal assessment of the production of reserve margins and transfer restrictions between load and resource areas, as well as the likelihood of supplying expected load levels, taking into account uncertainties.