NHEC Network Nodes - Updated December, 1999

Load Modeling Information for Suppliers

1997 hourly KW data includes NHEC consumer loads and distribution system losses. Transmission losses to PTF are not included (see further information below). NHEC’s distribution loss factor for its primary general members is 3.76%. For all other members it is 7.45%.

NHEC is represented in the NEPOOL/ISO Power System Model as four distinct Network Nodes, based on the transmitting utility NHEC is interconnected with in a particular geographic area:

• Load Assets located on the 28 NHEC delivery points interconnected with PSNH are attached to Network Node ID #1153.
• Load Assets located on the single delivery point (Charlestown) interconnected with NEP are attached to Network Node ID #1154.
• Load Assets located on the four delivery points interconnected with CVPS (Cornish, Lyme, North Charlestown and Haverhill) are attached to Network Node ID #1155.
• Load Assets located on the single delivery point interconnected with GMP (Monroe) are attached to Network Node ID #1156.

Parentheses following the Network Node provides additional information, in the following order:

1. The Interconnecting utility.
2. The Transmission provider's current non-PTF loss factor.

Total of the 28 PSNH Delivery Points (PSNH; 1.98%)

The historic load data for the Total of the PSNH Delivery Points are in hourly KW. The file shows load for each hour for each day in 1997. The metering point measures load flows into the area served at the delivery point and includes customer load and distribution system losses, but do not include the NEPOOL/ISO PTF transmission losses or the transmission provider’s non-PTF losses from the PTF to the delivery point.

Charlestown (NEP; 2.0%)

The historic load data for the Charlestown Delivery Point are in hourly KW. The file shows load for each hour for each day in 1997. The metering point measures load flows into the area served at the delivery point and includes customer load and distribution system losses, but do not include the NEPOOL/ISO PTF transmission losses or the transmission provider’s non-PTF losses from the PTF to the delivery point. The area served includes about 900 residential accounts, about 65 commercial accounts and two street lighting accounts.

Total Of The 4 Cvps Delivery Points (CVPS; 12.5%)

The historic load data for the Total of the CVPS Delivery Points are in hourly KW. The file shows load for each hour for each day in 1997. The metering point measures load flows into the area served at the delivery point and includes customer load and distribution system losses, but do not include the NEPOOL/ISO PTF transmission losses or the transmission provider’s non-PTF losses from the PTF to the delivery point.

Monroe (GMP; 5.2%)

The historic load data for the Monroe Delivery Point are in hourly KW. The file shows load for each hour for each day in 1997. The metering point measures load flows into the area served at the delivery point and includes customer load and distribution system losses, but do not include the NEPOOL/ISO PTF transmission losses or the transmission provider’s non-PTF losses from the PTF to the delivery point.

Load Profiles - Updated December, 1999
Load profiles for NHEC are based on 1997 billing and delivery point data. There are six profiles for the major classes of customers.

Files available:
Commercial

• Streetlights
• Large Commercial 100 KW Demand or greater
• Small Business 100 KW Demand or less
• Primary General

• Residential Off-Peak Heating ("OPH")
• Standard - Residential Homes - all other types
• All above Files - stored as a .zip archive

The Streetlights load profile is based on sunset to sunrise hours of operation. Each of the other five class load profiles is constructed as a combination of segment load shapes, based upon commercial building type or type of residential home. Example commercial segments include Hotels, Schools, Offices, Retail Stores, and Restaurants. Example residential segments include different Single Family Home segments, with varying shapes for Fossil Heat versus Electric Heat, and Central Air Conditioning versus no Central Air. The OPH class is primarily based on off-peak electric thermal storage heating. The segment load shapes are generated from statistical models based on the EPRI CEED database. Each segment’s weight for the composite class load profile is estimated using NHEC billing data, and U.S. Bureau of Labor employment data.

The segment models are developed from CEED using stepwise linear regression techniques, metered end-use data, and the corresponding historic weather data. Typically, five to 15 validated sites are used to construct the profiles, and 96 to 144 different hourly models are constructed for each building segment. There is one model for each season, day type (Weekday/Weekend) and hour. Each of the 8760 hours within the year is averaged across the number of sites that were used to construct a diversified segment load profile. Based on the above, an initial load profile was developed for the entire residential class loads. Then an OPH profile was developed primarily from end-use metered data. The standard residential class loads and load profile were subsequently developed by subtracting the OPH class loads from the total residential class loads