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                    Electric Supplier Information in Connecticut

                    Below is information pertinent for suppliers participating in Connecticut's deregulated market. Eversource provides assistance and supports energy suppliers and brokers.

                    Telemetering Information
                    Gordon Belcher
                    Meter Engineering
                    Eversource
                    107 Selden St.
                    Berlin, CT 06037 
                    860-665-2944
                    Fax: 860-665-2069
                    Business Contact
                    Daryush Donyavi
                    Account Executive - Supplier Services
                    Eversource
                    1985 Blue Hills Ave Ext.
                    Windsor, CT 06095
                    860-607-6170
                    EDI Testing Contact
                    Nirmal Vijaya
                    Eversource
                    107 Selden Street
                    Berlin, CT 06037
                    860-665-5065
                    Supplier Load Estimation and NEPOOL Billing
                    Karen Hodge
                    Manager - Load Settlement & Analysis
                    Eversource
                    107 Selden St.
                    Berlin, CT 06037 
                    860-665-5534
                    Customer Interval Data Requests
                    EPO Administrator
                    866-658-2356

                    HOLIDAY SCHEDULE

                    • New Year's Day - January 1 *
                    • Martin Luther King Day - Third Monday of January
                    • Presidents' Day - Third Monday in February
                    • Memorial Day - Last Monday in May
                    • Independence Day - July 4 * 
                    • Labor Day - First Monday in September
                    • Columbus Day - Second Monday in October
                    • Veterans Day - November 11 *
                    • Thanksgiving - When appointed
                    • Christmas - December 25 *

                    * If this holiday falls on a Sunday the following day will be observed as the holiday.

                    Important Documents

                    Electric Supplier Service Agreement

                    Information on the service agreement must be type written.

                    Energy Suppliers Processing Schedule
                    Daily Activity/Event Approximate Completion Time (24 hour clock)
                    Receive Supplier EDI Input 00:00 to 15:00
                    Daily Billing Cycle Process 16:00 - 08:00 (Upload readings, post cash billing)
                    Bills printed/inserted/mailed By 18:00
                    Transmit EDI Output to Suppliers 12:00 - 15:00

                    Profile Segments 

                    Load Estimation Methodology

                    Companies affiliated with Eversource have been involved with retail access load estimation procedures since 1996, when the first pilot program began in New England and since March 1998 when retail access began in Massachusetts. Eversource’s approach draws upon this experience, as well as regional work groups.

                    Supplier Hourly Load Determination

                    The daily load determination process results in estimated hourly loads for each Supplier for the previous day using interval data and customer billing information. These loads are reported to ISO-NE within 37 business hours from the day of dispatch.

                    On a monthly basis the estimates are refined by incorporating actual usage data obtained from customer meter readings as well as additional interval readings that may now be available.

                    There are several components in the daily load determination process:

                    • Select Load Shapes: Load profiles are generated for each customer within Eversource's Connecticut service territory. Actual hourly load data are utilized for customers that have interval recorders installed. For all other customers, daily class profiles are estimated utilizing representative historical load research data developed from samples designed to meet PURA regulatory standards.
                    • Aggregate Usage Information: A "usage factor" is calculated for each customer. This usage factor reflects the relationship of each customer’s actual meter read cycle usage to the average usage of customers in their respective class developed from the sample data over the same period.
                    • Develop Preliminary Estimates of Hourly Loads: A preliminary estimate of each Supplier’s hourly loads is produced by scaling the appropriate class profiles, relative to the associated usage factors, and including any telemetered data. Each Supplier’s loads will then be aggregated across the classes for a Supplier’s daily profile.
                    • Incorporate Non-Pool Transmission Facility (Non-PTF) Losses: Non-PTF Losses are added to each supplier’s load. Losses are 2.33% for primary customers and 5.16% for secondary customers.
                    • Reconcile to System Loads: The Suppliers' preliminary hourly loads are compared to the company’s actual hourly metered loads (as metered at the PTF boundary or interconnection point with the distribution company network). The difference, or residual, is allocated to Suppliers proportionally to the estimated portion of the Suppliers’ loads.

                    Monthly Reconciliation Process

                    The monthly reconciliation process, which utilizes the same methodology as the daily load determination process, incorporates the most recent customer usage, which is available after monthly meter readings have been processed. This process also includes actual hourly demand information from the non-telemetered interval recorders that have been processed subsequent to the initial estimate.

                    Revised Supplier values for the calendar month are reconciled to the revised system values for the same time period. Any residual is allocated proportionally to the estimated portion of the Supplier's loads. The resulting energy values are reported to ISO-NE within 90 days from the end of the calendar month.

                    Graphic Profile Segments

                    Numeric Profile Segments

                    Month PDF Link Excel Link
                    January Link Link
                    February Link Link
                    March Link Link
                    April Link Link
                    May Link Link
                    June Link Link
                    July Link Link
                    August Link Link
                    September Link Link
                    October Link Link
                    November Link Link
                    December Link Link
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