Drum Area / Summit Operations (Public . - California ISO
OperatingProcedureProcedure No.7240AVersion No.7.0Effective Date7/20/2020Drum Area / Summit Operations(Public Version)Distribution Restriction:NONEPurposeDescribes mitigation measures for congestion in the Drum Area and the Summit Inter-tie.Background InformationArea DescriptionAs illustrated in Figure 1, the Drum Area consists of 115 kV and 60 kV networks and connectto the rest of the ISO controlled grid through the following circuits: Drum-Rio Oso #1 and #2 115 kV lines, Placer-Gold Hill #1 and #2 115 kV lines, The Drum – Summit Intertie (two115 kV lines and one 60 kV line). Plumas –Sierra 60 kV Intertie (Connects PGAE’s 60 kV with NVE through thePlumas Sierra’s Marble substation).Rio Oso115 kVDrum Area115 kVand 60 kVNetworkSummitNVEPlumasSierraQuincy60 kVGold Hill115 kVFigure 1. Drum Area BoundaryDuring certain operating conditions, transmission lines in the Drum Area can becomeoverloaded. These overload limitations may constrain the Import/Export TTC ratings on theSummit Inter-tie.This document is controlled when viewed electronically.When downloaded or printed, this document becomes UNCONTROLLED.Page 1 of 8
OperatingProcedureProcedure No.7240AVersion No.7.0Effective Date7/20/2020Drum Area / Summit Operations(Public Version)Distribution Restriction:NONEDrum Area Control PointsDepending on area Generation/load patterns, power may flow into or out of the Drum area.Control Points are imposed to protect the area transmission network against N-1contingencies.Each Control Point consists of the following transmission lines:CP #1: Drum-Rio Oso #1 115 kV line (between Dutch Flat #2 and Brunswick). Higgins-Bell 115 kV line, at the Higgins end.CP #2: Drum-Rio Oso #2 115 kV line, at the Drum end. Higgins-Bell 115 kV line, at the Higgins end.Details for each Control Point are shown in Table 1.Table 1. Drum Area Control PointsCP#Control Point (MW)Loading Equation#174 Summer **100 WinterDrum-Rio Oso #1 115 kV ( , @Drum) Dutch Flat #2 Generation 0.36*HigginsBell 115 kV line( ,@Higgins)#274 Summer **100 WinterDrum-Rio Oso #2 115 kV ( , @Drum) 0.36*Higgins-Bell 115 kV line( ,@Higgins)(Wave trap limited at Rio Oso)** Control Points #1 and #2 are temperature adjusted in the summer (See Table 2, following, for details).Note 1: DA will use seasonal ratings.This document is controlled when viewed electronically.When downloaded or printed, this document becomes UNCONTROLLED.Page 2 of 8
OperatingProcedureDrum Area / Summit Operations(Public Version)Procedure No.7240AVersion No.7.0Effective Date7/20/2020Distribution Restriction:NONE1. Normal Operations1.1 Real-Time Monitoring & MitigationMonitor the Drum Area Control Points and mitigate as needed.1.2 Control Point #1 & #2 Spill ConditionsDuring Drum hydro spill conditions, the Drum hydro generation is classified as “RegulatoryMust Take” and has priority over imports on the summit Intertie (Path 24).1.2.3.4.ISO Transmission DeskIf the flow exceeds CP #1 or #2, Request NVE to reduce Summit Tie flow to the scheduled level.Curtail Summit East-West intertie schedules, such that the flow remains belowits Control Point with all the generation back as scheduled.Reduce effective Generation, as defined in ISO Operating Procedure 7240Drum Area / Summit Operations, as an immediate action to mitigate the ControlPoint exceedance.If the Control Point is no longer exceeded, Return the Drum Generation as soon as practical followed by theSummit East-West Interchange to pre-scheduled levels.1.3 Control Point #1 & #2 Non-Spill ConditionISO Transmission Desk1. If the flow exceeds CP #1 or #2, Inform NVE to reduce Summit Tie flow to the scheduled level.2. Curtail Summit East-West schedules and the effective Generation as defined inISO Operating Procedure 7240 Drum Area / Summit Operations.3. If the Control Point is no longer exceeded, Return the effected Generation and the Summit East-West Interchangeto pre-scheduled levels.This document is controlled when viewed electronically.When downloaded or printed, this document becomes UNCONTROLLED.Page 3 of 8
OperatingProcedureDrum Area / Summit OperationsProcedure No.7240AVersion No.7.0Effective Date7/20/2020Distribution Restriction:NONE(Public Version)2. Emergency Operations2.1 Loss of the Drum-Higgins 115 kV line, Higgins-Bell 115 kV Line or Bell-Placer 115 kVlineNote: Loss of the Drum-Higgins 115 kV Line, Higgins-Bell 115 kV Line, or Bell-Placer 115kV line may result in exceeding the normal rating of the Drum – Rio Oso #2 115 kV linewhen power flows outbound from the Drum Area (CP #1 or #2 flow is positive). Thiscontingency may also result in exceeding the emergency rating if CP #2 is exceeded precontingency.PGAE1. Monitor the Drum – Brunswick 115 kV line sections.2. Ensure the loading does not exceed the Emergency Rating (see Table 2). If the loading exceeds the Emergency rating,o Use temperature-adjusted Emergency line ratings per PGAEProcedure O-50 Short Term Transmission Facility Ratingsoutlined in Table 2 (Temperature is measured at Rio Oso). If the temperature-adjusted Emergency line rating is exceeded,o Reduce Drum Generation and Imports from NVE on the SummitTie.3. Reduce (within 4 hours) the Drum-Brunswick loading to within thetemperature-adjusted Normal line ratings per PGAE Procedure O-50 ShortTerm Transmission Facility Ratings in Table 2. If the temperature-adjusted Normal line rating is exceeded,o Further Reduce Drum Generation and Imports from NVE on theSummit Tie.Table 2. Temperature Adjusted Ratings for Drum – Rio Oso #1 or #2 Line, respectively3/0 CU Conductor at115 kVNormalEmergencyUnadjusted 70 75 80 85 F 90 F 95 F 100 F 105 FAmperes325436 424 411398384370355339MVA (@115 kV)64.786.8 84.5 81.7 79.376.573.770.767.5Amperes377473 462 451440427415402389MVA (@115 kV)7594.2 92.0 89.8 87.685.082.680.077.4This document is controlled when viewed electronically.When downloaded or printed, this document becomes UNCONTROLLED.Page 4 of 8WinterRating482/40096515/400102.6
OperatingProcedureDrum Area / Summit Operations(Public Version)Procedure No.7240AVersion No.7.0Effective Date7/20/2020Distribution Restriction:NONE2.2 Loss of One or Two of the Drum-Summit Tie-LinesCaution: The Summit Tie TTC can be further affected by additional transmission and/orGeneration clearance(s) in the Drum Area.Further OE studies may be required.ISO Transmission Desk1. When one or two of the following three Tie-lines are out of service:– Drum-Summit #1 115 kV– Drum-Summit #2 115 kV– Drum-Spaulding-Summit 60 kV The Drum-Summit Inter-tie TTC may be affected.2. Use Table 3 to determine the appropriate TTC.Note: The methodology used to develop the transfer capabilities assume that NVEwill not move the phase shifter at California Substation post-contingency to restorethe Summit Tie to the scheduled Interchange or pre-contingency level.Non-compliance with this assumption will cause thermal overloading and severelydamage PGAE’s equipment.This document is controlled when viewed electronically.When downloaded or printed, this document becomes UNCONTROLLED.Page 5 of 8
OperatingProcedureProcedure No.7240AVersion No.7.0Effective Date7/20/2020Drum Area / Summit OperationsDistribution Restriction:NONE(Public Version)TTC*Line StatusTable 3. Path 24 TTCDrumSummit 115kV # 1InInInOutIn(LimitingElement)OutOutDrumSummit 115kV # mmit 60kV OutIn100 MW (S)100 MW (S)100 MW (S)100 MW (S)75 MW (S)70 MW (S)100 MW (W)100 MW (W)100 MW (W)100 MW (W)100 MW (W)70 MW (W)120 MW (S)120 MW (S)120 MW (S)120 MW (S)75 MW (S)70 MW (S)120 MW (W)120 MW (W)120 MW (W)120 MW (W)105 MW (W)70 MW (W)West East TTCEast West TTC0**0*** Although this table lists Path 24 TTC, there is a bottleneck in Reno on the NVE side that can limit theTTC from 44 MW to 105 MW. Although the Marble tie is not part of Path 24, it is part of the bottleneckon the Reno side of Path 24. As a result of the Reno limitation, Marble flows and Summit flows makeup the most conservative transfer capability that we operate to.** It is not recommended to operate the tie with only the Drum-Spaulding-Summit 60 kV line.2.3 Ring Bus Breaker Clearances at Drum SubstationNote: A Regional Transmission study is required for a ring bus breaker clearance at DrumSubstation. The next contingency of a 115 kV line loss at Drum could split the ring bus atthe Drum Substation, potentially overloading the Drum-Grass Valley-Weimar 60 kV line.Depending on the system conditions, such as the area Load, Generation pattern, and the60 kV configuration; the Summit Tie Import/Export TTC can be restricted.This document is controlled when viewed electronically.When downloaded or printed, this document becomes UNCONTROLLED.Page 6 of 8
OperatingProcedureDrum Area / Summit Operations(Public Version)Procedure No.7240AVersion No.7.0Effective Date7/20/2020Distribution Restriction:NONE2.4 Gold Hill N-1-1 ConditionsUpon loss of either parallel Gold Hill #1 or #2 230/115 kV transformer bank, or parallelPlacer-Gold Hill #1 or #2 115 kV line under heavy load conditions, loss of the remainingparallel bank or line could result in sustained severe overload of the Drum-Higgins 115 kVline and low area voltages.ISO Transmission Desk1. If Gold Hill 230/115 kV Bank #1 or #2 is lost or removed from service, Monitor RTCA for loss of the remaining Gold Hill 230/115 kV bank. Consider opening Bell-Placer 115 kV line if RTCA shows severeoverload of Drum-Higgins 115 kV line or low area voltages.2. If Placer-Gold Hill #1 or #2 115 kV line is lost or removed from service, Monitor RTCA for loss of the remaining Placer-Gold Hill 115 kV line. Consider opening Bell-Placer 115 kV line if RTCA shows severeoverload of Drum-Higgins 115 kV line or low area voltages.Version HistoryVersion6.26.36.46.57.0ChangeDeleted reference to limit 3 and 4 from Drum Area Limitsand from Normal Operations.Updated logo, updated ISO action tables to show as “ISOTransmission Dispatcher Actions.”Periodic Review - Updated Table 3 and associated notes.Changed “SOL” (System Operating Limit) and “Limit”references to “CP” (Control Point).Changed “OTC” and “Scheduling Limit” references to“TTC”Updated Table 3 to reflect line limits for single line inservice conditions.Added Section 2.4 to address Drum area N-1-1 conditions.Replaced CAISO with ISO in most instances.Replaced PG&E with PGAE in most instances.Replaced NVEnergy with NVE.Periodic Review:Minor format and grammar updates.This document is controlled when viewed electronically.When downloaded or printed, this document becomes UNCONTROLLED.Page 7 of 8Date4/11/134/28/168/12/169/22/177/20/20
OperatingProcedureDrum Area / Summit Operations(Public Version)Procedure No.7240AVersion No.7.0Effective Date7/20/2020Distribution Restriction:NONETechnical ReviewReviewed By Content ExpertDateOperating Procedures7/15/20Real-Time Operations7/15/20Operations Planning - North7/15/20This document is controlled when viewed electronically.When downloaded or printed, this document becomes UNCONTROLLED.Page 8 of 8
Reduce effective Generation, as defined in ISO Operating Procedure 7240 Drum Area / Summit Operations, as an immediate action to mitigate the Control Point e
around the drum. 4) Insert one bass drum spur (5) (leg) on each side and hand tighten them with the T-handle located on the bracket. 1) Bass Drum 2) Bass Drum Hoops 3) Bass Drum Heads a. Front b. Back 4) Bass Drum Tension Rods & Claw Hooks 5) Bass Drum Spur 6) Bass Drum Pedal 7) Bass Drum Beater 8) Floor Tom 9) Floor Tom Key Rods 10) Floor Tom .
The bass drum is the foundation of the drumset.The basic function of the bass drum is to state the beat or pulse of the song. The BASS DRUM is played with the bass drum pedal by the right foot.The bass drum pedal beater should rebound off of the bass drum head like a bouncing ball. Properly adjusting the angle of the bass drum pedal beater is .
coloration. In Virginia, red drum are called "channel bass." Anglers in North Carolina refer to red drum less than 15 pounds as "puppy drum," those 15 to 30 pounds as "yearlings," and those heavier than 30 pounds are simply "drum." Throughout the text, I will use the accepted common name, red drum. The red drum is a member of .
7. Bass Drum - along with cymbals and triangle, this low-pitch drum originated in Turkey and typically provides a strong beat for marching or dancing. 8. Snare drum - The snare drum developed from the medieval Tabor, a European marching drum used for signals as far back as 1300. 9. 'Trap set' - the ancestor of the modern drum kit, trap sets .
drum rotating mirror rollers Printers 1: Drum rotates as How does a laser printer work? paper is fed through 2: Mirror deflects laser beam across surface of drum 3: Laser beam creates charge that causes toner to stick to drum 4: As drum rotates, toner transfers from drum to paper 5: Rollers use heat and pressure to fuse toner to paper p. 6.17 .
Vertical Water Tube Boiler Double Tube Longitudinal Drum Box Header Submerged Tube 3 Drum Bent Tube A Type (3 Drum) R.P Bent Tube D Type Straight Cross Drum O Type Sinuous (Sectional ) Header Two Drum Vertical with Water Wall Furnace 3 Drum Divided Flow Once Thru (Radiant) Utility Two Stage Furnace Integral Furnace
The drum kit has a power save function that will be activated after a period of 1 minute. In power save mode the drum kit keys will not respond to presses; strike any drum pad to wake up the drum kit and continue playing. 11. MIDI operation The drum kit can be connected to a personal computer, either Windows or MAC using the USB cable supplied.
surface like a snare drum, will not be successful on the drum set. A drummer must have a level of independence between: Right hand - Ride Cymbal Left hand - Snare Drum Right Foot - Bass Drum Left Foot - Hi-hat Each limb plays a different instrument (Drum or Cymbal) at the same time.
