PNNL Taxonomy Feeders - Region 5 - Feeder 7

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 5 is the South East of the United States and is characterized by a hot and humid climate. Within climate region 5 there are 5 12.47 kV feeder types, 1 25.00 kV feeder type, and 1 35.00 kV feeder type.

This feeder is a representation of a moderately populated suburban area with a lightly populated urban area. This is composed mainly of single family residences with some moderate commercial loads. Approximately 10% of the circuit-feet are overhead and 90% underground. It would be expected that this feeder has connections to adjacent feeders through normally open switches. 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. The residential load is spread out across the entire length of the feeder with the moderate commercial center near the substation. This feeder is representative of a substation that is built in a “green field” where significant load growth is expected. The first feeders must go a significant distance before they reach the load. Over time the load moves towards the substation and past it.