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A set of practice questions and answers related to the pjm (pennsylvania-new jersey-maryland) generation dispatcher exam. It covers various aspects of power system operation, including voltage regulation, generator limits, synchronization, emergency procedures, and reactive power management. The questions address real-time operating scenarios, nerc disturbance reporting, and market operations within the pjm system. This resource is valuable for individuals preparing for the pjm generation dispatcher exam, offering insights into the practical knowledge required for grid operation and emergency response. It also touches on topics such as black start procedures, frequency control, and maintenance outages, providing a comprehensive overview of the dispatcher's responsibilities. Designed to test and reinforce understanding of critical concepts in power system management and grid stability, making it an essential study aid for aspiring dispatchers.
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An |EXCITER |on |a |traditional |generator |does |what? |- |CORRECT |ANSWER✔✔-Voltage |regulation | (AVR) |if |you |change |the |excitation |current, |you |change |the |voltage. ECO |Min, |ECO |Max, |and |EMERG |Max |are |genrator |_________________. |- |CORRECT | ANSWER✔✔-Limits When |synchronizing |to |the |interconnection, |what |needs |to |be |synchronized? |- |CORRECT | ANSWER✔✔-Frequency, |Voltage, |and |phase |angle. GMD |(GeoMagnetic |Disturbance) |procedure |is |implemented |when? |- |CORRECT |ANSWER✔✔- 10A |or |greater |is |measured |by |special |equipment |at |Missouri |Ave |or |Meadowbrook |and |the | measurement |is |confirmed |by |one |of |the |following |other |sources: |Excess |transformer |current | @ |Meadowbrook, |Beddington, |Donbs, |or |Black |Oak, |high |MVAR |requirements |on |transformers |@ |Hopw |Creek |or |Salem |nuclear |subs, |or |high |DC |measurements |@ |Limerick |or |Peach | Bottom. What |are |the | 2 |types |of |National |Terrorism |Advisory |Alerts? |- |CORRECT |ANSWER✔✔-Elevated | and |Imminent. What |action |does |PJM |take |for |a |terrorist |attack, |fuel |delivery |emergency, |or |GMD's? |- | CORRECT |ANSWER✔✔-Conservative |Operations What |does |PJM |put |the |most |emphasis |on |during |a |terrorist/sabotage |event? |- |CORRECT | ANSWER✔✔-Operations |and |Communications
What |does |PJM |request |during |a |low |voltage |alert? |- |CORRECT |ANSWER✔✔-RRC |- |reactive | reserve |check PJM |issues |a |Heavy |Load |Voltage |Warning |how |many |hours |prior |to |implementation? |- | CORRECT |ANSWER✔✔-4 |hours What |should |generation |owners/operators |do |during |a |High |System |Voltage |Action? |- | CORRECT |ANSWER✔✔-Operate |at |the |lower |bandwidth |of |the |voltage |schedule. How |many |hours |do |you |have |to |report |a |24-hr |reportable |NERC |disturbance? |- |CORRECT | ANSWER✔✔-6 |hours What |report |is |generated |during |a |Max |Emergency |Gen |Alert? |- |CORRECT |ANSWER✔✔-SSR |- | Supplementary |Status |Report What |part |of |the |SSR |is |the |Fuel |Limited |Resources |accounted |for? |- |CORRECT |ANSWER✔✔- Part |G |Resource |Limited |Units |which |are |units |that |are |not |able |to |run |at |max |capacity |for | more |than | 72 |hours. What |kind |of |Emergency |Procedures |occur |during |real |time |operating |hours? |- |CORRECT | ANSWER✔✔-Actions What |is |the |per |Unit |(p.u.) |for |a | 345 |kV |nominal |voltage |that |is |currently |at | 348 |kV? |- | CORRECT |ANSWER✔✔-348/345 |= |1.008 |pu What |is |the |Emergency |Reducible |Generation |(ERG) |if |the |Eco |Min |is | 100 |and |the |Emergency | Min |is |75? |- |CORRECT |ANSWER✔✔-Eco |Min |- |Emerg |Min |= |25MW
What |size |generating |units |must |provide |instantaneous |power |and |reactive |flow |data? |- | CORRECT |ANSWER✔✔-10 |MW |and |above How |often |must |PJM |be |updated |for |manually |entered |data? |- |CORRECT |ANSWER✔✔-30 |min How |often |is |generator |reactive |capability |testing |required? |- |CORRECT |ANSWER✔✔-Every | 5 | yrs. How |much |notification |is |required |to |bring |a |self-scheduled |unit |online? |- |CORRECT | ANSWER✔✔-20 |min What |time |of |the |day |does |the |DA- |Day |ahead |market |close? |- |CORRECT |ANSWER✔✔-1200 | EST |and |all |bids |must |be |in |by |this |time. Eco |Min, |Eco |Max, |and |Emerg |max |are |all |generator |______________ |. |- |CORRECT | ANSWER✔✔-Limits What |time |is |the |rebidding |period |for |the |DA |market? |- |CORRECT |ANSWER✔✔-4 |- | 6 |pm Who |specifies |the |voltage/reactive |power |schedule? |- |CORRECT |ANSWER✔✔-TO |- | transmission |owner PJM |requires |generators |that |are |greater |than |what |level |to |follow |a |voltage |schedule? |- | CORRECT |ANSWER✔✔-20 |MVA |or |aggregated | 75 |MVA PJM |sends |what |signals |to |Market |Operation |Centers? |- |CORRECT |ANSWER✔✔-ACE, | Regulation, |and |Dispatch
PJM |instructs |your |Generator |to |come |online. |From |what |time |to |the |time |it |is |running? |- | CORRECT |ANSWER✔✔-Notification |time |+ |Time |to |start Operating |reserves |consists |of |what? |- |CORRECT |ANSWER✔✔-Synchronized |reserves, |non- synchronized |reserves |(quick |start), |and |supplemental |reserves |(secondary) Regulating |units |(demand |response |resources) |provide |a |variable |amount |of |generation |under | automatic |control |to |provide |what? |- |CORRECT |ANSWER✔✔-Correction |for |small |deviations |in |load. Where's |the |ideal |point |for |regulation |to |operate? |- |CORRECT |ANSWER✔✔-Midpoint What |type |of |outage |may |be |deferred |to |beyond |the |next |weekend |or |can |be |postponed |to | the |following |Mon |morning |at |0800? |- |CORRECT |ANSWER✔✔-Maintenance |outage How |long |is |a |maintenance |outage |during |PPM- |Peak |Period |Maintenance? |- |CORRECT | ANSWER✔✔-9 |days How |long |is |a |maintenance |outage |during |non-Peak |Period |Maintenance? |- |CORRECT | ANSWER✔✔-Unlimited When |ambient |temperatures |are |low, |what |happens |to |CT |operation? |- |CORRECT | ANSWER✔✔-MW |increased |as |temperature |decreases. What |is |the |maximum |amount |of |reactive |power |increments |put |onto |the |grid |during |a | reactive |power |capability |test |at |one |time? |- |CORRECT |ANSWER✔✔-100 |MVAR
During |restoration |what |is |the |frequency |control |range? |- |CORRECT |ANSWER✔✔-59.75 |- |61.0 | Hz What |permits |the |manual |closing |of |a |circuit |breaker |between | 2 |control |areas? |- |CORRECT | ANSWER✔✔-Synchroscope What |is |the |normal |frequency |control |mode |used |by |PJM? |- |CORRECT |ANSWER✔✔-Tie-line | bias A |unit |running |for |transmission |congestion |is |subject |to |what? |- |CORRECT |ANSWER✔✔-Price | cost |capping What |kind |of |transformers |are |used |to |measure |power |line |voltages? |- |CORRECT |ANSWER✔✔- Potential |Transformers What |is |the |lowest |voltage |in |the |BES? |- |CORRECT |ANSWER✔✔-100 |kV What |is |the |lowest |operating |voltage |in |PJM? |- |CORRECT |ANSWER✔✔-115 |kV What |side |of |the |transformer |is |connected |to |the |power |source? |- |CORRECT |ANSWER✔✔- Primary |winding If |a |generator |is |under |excited, |(-) |value, |absorbing |VAR's |is |it |leading |or |lagging? |- |CORRECT | ANSWER✔✔-Leading
PJM |calls |and |instructs |you |to |increase |MVAR |output |for |voltage |support |by | 50 |MVAR. |What | do |you |do? |- |CORRECT |ANSWER✔✔-Look |at |"D" |curve |and |decrease |your |MW |output |to |a | level |that |will |increase |reactive |power |output |by | 50 |MVAR. Planned |outages |are |submitted |no |later |than? |- |CORRECT |ANSWER✔✔-30 |days