Get ready to fall back to Eastern Standard Time  
Tuesday, October 10, 2017 at 10:10AM
ISO New England in Market Participant Announcements, energy markets, wholesale markets

New England will return to Eastern Standard Time (EST) on Sunday, November 5, when at 2:00 a.m., clocks must be set back one hour to 1:00 a.m. Each of the ISO's market applications is unique and will function differently during this transition. Here are the things market participants need to know to prepare.

1. Bids and offers that use upload and downloads for the eMarket application follows ISO 8601 Date and Time format for XML submittals. This is explained in section 3.1.2 of the eMarket Data Exchange Specification document posted on the ISO website.

The transition will cover 2017-11-05T00:00:00–04:00 through 2017-11-05T23:00:00–05:00. For example: the time (or hour) is represented in the format below. Note that the DateTime format includes the time zone indicator and the example shows time in Eastern Standard Time.

time="2017-11-05T00:00:00-04:00"

time="2017-11-05T01:00:00-04:00"

time="2017-11-05T01:00:00-05:00" (extra hour)

time="2017-11-05T02:00:00-05:00"

---

---

time="2017-11-05T22:00:00-05:00"

time="2017-11-05T23:00:00-05:00"

2. Asset telemetry, hourly-resource availability upload/downloads via DRMUI application must submit the extra hour as given below.

Greenwich Mean Time (GMT) time format upload/download

The transition will cover 2017-11-05T00:00:00–04:00 through 2017-11-05T23:00:00–05:00. For example:

2017-11-05T04:00:00Z (first five-minute interval)
….
2017-11-05T05:00:00Z
….
2017-11-05T06:00:00Z
….
2017-11-05T07:00:00Z
….
2017-11-05T03:55:00Z
….
2017-11-05T04:55:00Z (last five-minute interval of the day)

Eastern Standard Time for upload/download

The transition will cover 2017-11-05, 00:00:00–04:00 through 2017-11-05, 23:55:00–05:00. For example:

2017-11-05 00:00:00–04:00 (first five-minute interval) (starts with Easters Daylight Time with 4 hours offset)
….
2017-11-05 01:05:00–04:00
….
2017-11-05 01:50:00–04:00
….
2017-11-05 01:55:00–04:00
….
2017-11-05 01:00:00–05:00 (fall back by an hour and goes to Easter Standard Time with 5 hours offset)
….
2017-11-05 01:05:00–05:00
….
2017-11-05 01:10:00–05:00
….
2017-11-05 02:00:00–05:00
….
2017-11-05 03:00:00–05:00
….
2017-11-05 04:00:00–05:00
….
2017-11-05 05:00:00–05:00
….
….
….
2017-11-05 23:55:00–05:00 (last interval for the day)

3. Internal bilateral transactions and any meter readings that use uploads and downloads for the SMS application must have the extra hour represented as 2* (that is, “2” followed by an asterisk). The Contract Upload File Formats, the Internal Bilateral Download, and the SMD Metering Upload File Format documents located on the ISO New England website contain required formatting information.  

4. MIS reports will present the extra hour as 02X.

5. Lastly, EES and OATI’s eTag system handle the time change differently. EES will insert an extra hour as 01:00*. This extra hour will appear automatically in the market user interface and in any file downloads. For a file upload where the energy profile is changing during the time change hour, a separate interval for that hour must be included. Examples of EES schedules are shown below. In general, eTags should be created in Eastern Daylight Time (EDT) and cover 25 hours (11/04/2017 00:00 – 11/05/2017 01:00). However, if the transaction begins after the time change has occurred, create the eTag in EST and create the EES schedule in the normal manner.

EES file upload example:

<ENERGY_INTERVALS_SECTION>

                <ENERGY_INTERVAL>

                                <ENERGY_START_DATE>11/05/2017 00:00</ENERGY_START_DATE>

                                <ENERGY_STOP_DATE>11/05/2017 01:00</ENERGY_STOP_DATE>

                                <MAX_ENERGY>1</MAX_ENERGY>

                </ENERGY_INTERVAL>

               <ENERGY_INTERVAL>

                                <ENERGY_START_DATE>11/05/2017 01:00</ENERGY_START_DATE>

                                <ENERGY_STOP_DATE>11/05/2017 01:00*</ENERGY_STOP_DATE>

                                <MAX_ENERGY>2</MAX_ENERGY>

                </ENERGY_INTERVAL>

               <ENERGY_INTERVAL>

                                <ENERGY_START_DATE>11/05/2017 01:00*</ENERGY_START_DATE>

                                <ENERGY_STOP_DATE>11/05/2017 02:00</ENERGY_STOP_DATE>

                                <MAX_ENERGY>3</MAX_ENERGY>

                </ENERGY_INTERVAL>

               <ENERGY_INTERVAL>

                                <ENERGY_START_DATE>11/05/2017 02:00</ENERGY_START_DATE>

                                <ENERGY_STOP_DATE>11/05/2017 24:00</ENERGY_STOP_DATE>

                                <MAX_ENERGY>4</MAX_ENERGY>

                </ENERGY_INTERVAL>                                                                                                                 

</ENERGY_INTERVALS_SECTION>

Additional information and EES file format examples are found in the EES Upload and Download File Format document on the ISO New England website. All market participants are encouraged to test their upload files for November 5, 2017, in the SMD Sandbox.

If you have questions on the information above, contact Customer Support at 413-540-4220 or custserv@iso-ne.com.

Article originally appeared on ISO Newswire (http://isonewswire.com/).
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