PNNL Taxonomy Feeders Region 4 - Feeder 1

Abstract

This model is one of 24 prototypical feeders as well as including limited equipment information. The number of nodes includes only the primary distribution system; there are additional nodes in the secondary system. The secondary system nodes are on the customer side of their service transformer. These are the nodes, and links, that model the connections from the service transformer to the service meters via triplex or other cables. As discussed earlier in section 2.2 the classification process separated the feeders into three voltage classes; 12.47 kV, 25.00 kV, and 35.00 kV. In the actual feeder models it will be seen that voltages other than these three are used. From Tables 3 and 4 it can be seen that within the 12.47 kV cluster there are 12.47 kV and 13.8 kV feeders. This fact is represented in the following feeder descriptions

Climate Region 4 Climate region 4 is the non-coastal South East and central areas of the United States and is characterized by a hot and cold climate. Within climate region 4 there are 2 12.47 kV feeder types, and 1 25.00 kV feeder type.

This feeder is a representation of a heavily populated urban area with the primary feeder extending into a lightly populated rural area. In the urban areas the load is composed on moderate commercial loads with single and multi-family residences. On the rural spur the load is primarily single family residences. Approximately 92% of the circuit-feet are overhead and 8% underground. This feeder has connections to adjacent feeders in the urban area, but limited connections in the rural areas. For this reason it would be common to limit the feeder loading to 50% to ensure the ability to transfer most of the loads from other feeders, and vice versa. Most of the urban load is located near the substation while the rural load is located at a substantial distance.