California Independent System Operator Corporation Submission of Non-PTO Wheeling Data The document describes the reporting requirements for Scheduling Coordinators who submit load schedules for Non-Participating Transmission Owners within CAISO Control Area and how the CAISO uses such information to calculate the Wheeling Access Charge. Description: Scheduling Coordinators (SC s) who schedule load for a Non-Participating Transmission Owner located within the CAISO Control Area and who use CAISO transmission capacity exceeding the Non-PTO transmission contract limit will incur a Wheeling Access Charge. SC s are required to self-report information about such scheduled transactions to the CAISO each month (refer to CAISO Tariff Section 26.1.4.4). The CAISO uses these self-reports to calculate the Wheeling Access Charge for each SC. Requirements: Scheduling Coordinators who schedule load for a Non-Participating Transmission Owner (Non- PTO) at any given point between the CAISO Controlled Grid and the Non-PTO 1, and schedule in an amount exceeding the Non-PTO transmission contract limit, must submit information about these scheduled transactions to the CAISO within 5 days after the end of the calendar month (form and format described below). That a Scheduling Coordinator may acquire such energy through an inter-sc trade schedule, a generation schedule, an import schedule, or from any other source does not eliminate the obligation to self-report such wheeling transactions that is, the obligation to report is borne by the SC who submits a non-pto load schedule to the CAISO. Wheeling Access Charge (WAC) Reporting: Wheeling Access Charge (WAC) rates are established for each Transmission Access Charge Area (TAC) and a rate exists for each Scheduling Point at which energy is wheeling out of the CAISO Controlled Grid. If the load take-out point is located at a high voltage transmission facility, the wheeling transaction shall be billed at the High Voltage WAC rate. If the Scheduling Point is located at a low voltage transmission facility, the wheeling transaction will be billed at the Low Voltage WAC rate in addition to the High Voltage WAC rate (refer to CAISO Tariff Section 26.1.4.1 & 26.1.4.2) A list of Non-PTO entities, respective take-out points, and the associated WAC rates is posted on the CAISO web site. To view, go the CAISO home page, at www.caiso.com, then click on >The Operations Center >Services > Certification and Participation Processes >Participating Transmission Owner (PTO) >Transmission Access Charge Rates >Wheeling Rates). You can also reach the list directly at the following link: http://www.caiso.com/docs/2002/02/05/2002020510502821880.html 1 Some existing contracts are not path specific, but are tied to a network of paths that serve the Non-PTO. In this case, only submit wheeling volumes to the CAISO that exceed the Non-PTO s existing contract amount on the network in a given trading interval. Page 1
For an example of how wheeling transactions should be calculated and reported, please refer to Attachment 1 and the Wheeling Submission Example of this document. Data should be selfreported in a CSV or Excel file format. Once complete, please email the report to the CAISO at wheeling@caiso.com. Alternatively, you can mail report to the address listed below. Note, however, that the data must be received by the CAISO within 5 days. Attention: California ISO Billing & Settlements Folsom, CA 95630 Attn: Sanda Ghiurau Should you have any questions about how to report such data, please contact your Client Representative, or email the Wheeling email inbox at wheeling@caiso.com. Enforcement Protocol: The CAISO Tariff Enforcement Protocol section EP 6.1 requires that all information required under the CAISO Tariff must be submitted in a complete, accurate, and timely manner. The Enforcement Protocol provides for a sanction of $500 a day for each day such data is late. Failures to timely report that data described in this document are subject to investigation by the Department of Market Monitoring in accordance with the provisions detailed in this Enforcement Protocol section. Page 2
Non-PTO Wheeling Transaction Calculation: For each trading interval (24/day), wheeling charges apply if a SC s wheeling transactions to a Non-PTO load exceed the Non-PTO s Existing Transmission Contract Capacity on a given path. For example, if a Non-PTO has rights on three paths, the SC must evaluate each path separately by subtracting the total volume wheeled to the Non-PTO from the Non-PTO s rights under an Existing Transmission Contract (ETC). The remaining value is the volume wheeled under New Firm Uses (NFU) and is subject to wheeling charges. For a given trade interval: Path B 50 MW ETC 75 MW Import* Path C 300 MW ETC 200 MW Generation* Path A 75 MW ETC 100 MW Import* Non-PTO Load *Each Import and Generation Schedule is tied to a Contract Reference Number ETC = Existing Transmission Contract ATTACHMENT 1 Operating Day 04/01/06 Wheeling Volume A ETC B New Firm Uses A - B if A>B; otherwise 0 Path A 100 75 25 Path B 75 50 25 Path C 200 300 0 Total: 50 MW Wheeling Volume Subject to Wheeling Charges in this Trade Interval Page 3
For each day of the calendar month, for each Non-PTO interconnection point, and for each trading interval, the portion of Non-PTO load subject to wheeling charges must be calculated and summed by path. Below is an example calculation for a single day on a single path: Trading Interval 04/01/06; PATH A 0100 0200 0300 0400 0500 0600 0700 0800 0900 1000 2400 SUM Wheeling Volume to Non-PTO Load; (MW- Path A) (A) Existing Transmission Contract Capacity; (MW- Path A) (B) Difference Between Scheduled Load and ETC Rights = New Firm Uses; (MW- Path A) (A) (B) if A > B, otherwise 0 50 50 60 55 80 60 65 80 85 80 65 75 75 75 75 75 75 75 75 75 75 75 0 0 0 0 5 0 0 5 10 5 0 25 Daily Wheeling Volume Subject to Wheeling Charges on Path A Page 4
Wheeling Submission Example: For each Non-PTO interconnection point, sum all of the daily Wheeling Volumes subject to Wheeling Charges for the calendar month for each path and e-mail this data in an attachment to the ISO (as shown below): NON PTO WHEELING SUBMISSION SC Interconnection with Non-PTO Operating Month Take-Out Point Monthly Wheeling Volume subject to Wheeling Charges (MWh) SCID Non-PTO Load Apr-06 AAA_1_V100LD 11,668 Provide data for all applicable Trading Days in Calendar Month Operating Day NFU TOTAL 4/1/2006 50 4/2/2006 151 4/3/2006 45 4/4/2006 16 4/5/2006 48 4/28/2006 454 4/29/2006 125 4/30/2006 4545 GRAND TOTAL 11668 Note: NFU 2 Total refers to Wheeling energy above the Non PTO existing transmission contract limits on any given path Note: Monthly Wheeling Volumes may be submitted in KWh or MWh. File must specify which was used. Submit Monthly Wheeling Volumes Subject to Wheeling Charges to the ISO for each Non-PTO Interconnection Point 2 New Firm Use (NFU) refers to non-etc capacity, which is subject to Wheeling charges. Page 5