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A practice exam for pjm (pennsylvania-new jersey-maryland interconnection) generation dispatchers. It covers key concepts related to generator operation, synchronization, emergency procedures, voltage control, and market operations. The questions and answers are designed to test the knowledge required for dispatching and managing power generation resources within the pjm system. It includes topics such as exciter function, generator limits, synchronization requirements, geomagnetic disturbance procedures, terrorism advisory alerts, voltage warnings, and reporting requirements. It also covers emergency reducible generation, black start units, regulation, data exchange, reactive capability testing, and outage management. The practice exam is useful for those preparing for the pjm generation dispatcher exam or for anyone seeking to understand the complexities of power system operation and dispatch.
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An EXCITER on a traditional generator does what? - correct answersVoltage regulation (AVR) if you change the excitation current, you change the voltage. ECO Min, ECO Max, and EMERG Max are genrator _________________. - correct answersLimits When synchronizing to the interconnection, what needs to be synchronized? - correct answersFrequency, Voltage, and phase angle. GMD (GeoMagnetic Disturbance) procedure is implemented when? - correct answers10A 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 answersElevated and Imminent. What action does PJM take for a terrorist attack, fuel delivery emergency, or GMD's? - correct answersConservative Operations What does PJM put the most emphasis on during a terrorist/sabotage event? - correct answersOperations and Communications
What does PJM request during a low voltage alert? - correct answersRRC - reactive reserve check PJM issues a Heavy Load Voltage Warning how many hours prior to implementation? - correct answers4 hours What should generation owners/operators do during a High System Voltage Action? - correct answersOperate at the lower bandwidth of the voltage schedule. How many hours do you have to report a 24-hr reportable NERC disturbance?
How often is generator reactive capability testing required? - correct answersEvery 5 yrs. How much notification is required to bring a self-scheduled unit online? - correct answers20 min What time of the day does the DA- Day ahead market close? - correct answers1200 EST and all bids must be in by this time. Eco Min, Eco Max, and Emerg max are all generator ______________. - correct answersLimits What time is the rebidding period for the DA market? - correct answers4 - 6 pm Who specifies the voltage/reactive power schedule? - correct answersTO - transmission owner PJM requires generators that are greater than what level to follow a voltage schedule? - correct answers20 MVA or aggregated 75 MVA PJM sends what signals to Market Operation Centers? - correct answersACE, Regulation, and Dispatch PJM instructs your Generator to come online. From what time to the time it is running? - correct answersNotification time + Time to start
Operating reserves consists of what? - correct answersSynchronized 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 answersCorrection for small deviations in load. Where's the ideal point for regulation to operate? - correct answersMidpoint What type of outage may be deferred to beyond the next weekend or can be postponed to the following Mon morning at 0800? - correct answersMaintenance outage How long is a maintenance outage during PPM- Peak Period Maintenance? - correct answers9 days How long is a maintenance outage during non-Peak Period Maintenance? - correct answersUnlimited When ambient temperatures are low, what happens to CT operation? - correct answersMW 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 answers MVAR Who can authorize a voltage schedule change? - correct answersTO - Transmission Owner
What permits the manual closing of a circuit breaker between 2 control areas? - correct answersSynchroscope What is the normal frequency control mode used by PJM? - correct answersTie-line bias A unit running for transmission congestion is subject to what? - correct answersPrice cost capping What kind of transformers are used to measure power line voltages? - correct answersPotential Transformers What is the lowest voltage in the BES? - correct answers100 kV What is the lowest operating voltage in PJM? - correct answers115 kV What side of the transformer is connected to the power source? - correct answersPrimary winding If a generator is under excited, (-) value, absorbing VAR's is it leading or lagging? - correct answersLeading PJM calls and instructs you to increase MVAR output for voltage support by 50 MVAR. What do you do? - correct answersLook 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 answers30 days