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A set of practice questions and answers for the nerc certification exam. It covers various topics related to the north american electric reliability corporation (nerc) standards and regulations, including the nerc functional model, interconnections, balancing authorities, and automatic generation control (agc). Useful for individuals preparing for the nerc system operator certification exam.
Typology: Exams
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True/False According to the NERC Functional Model, there is no difference between the function and the entity. A) True B) False - CORRECT ANSWERS ✔✔B) False True/False Analysis type questions are designed to be the least complex from a human cognitive process. A) True B) False - CORRECT ANSWERS ✔✔B) False True/False A Transmission Service Provider is an entity that both owns and operates transmission facilities on the Bulk Electric System.
A) True B) False - CORRECT ANSWERS ✔✔B) False True/False The NERC Functional Model is designed so that the functions of Generator Owner and Generator Operator can be performed by two different entities. A) True B) False - CORRECT ANSWERS ✔✔A) True How many forms of identification are required when taking the NERC System Operator Certification exam? A) 4 B) 9 C) 1 D) 2 - CORRECT ANSWERS ✔✔ 2 The NERC came into existence as a result of the Electric Power Reliability Act of what year? A) 1958 B) 2005
True/False Balancing Authorities are responsible to ensure that transmission facilities are operated within the limits that are established by the Transmission Owners. - CORRECT ANSWERS ✔✔False The first power pool in the industry was created in 1927 and was known as which of the following? - CORRECT ANSWERS ✔✔Pennsylvania-New Jersey Interconnection How many Interconnections are there in North America? A) 4 B) 6 C) 2 D) 8 - CORRECT ANSWERS ✔✔A) 4 True/False All four Interconnections operate at ____ Hz, but are not in synchronization with each other. A) 59Hz/False B) 62Hz/True C) 60HZ/True D) 60.02Hz/False - CORRECT ANSWERS ✔✔C) 60Hz
How many High-Voltage Direct Current transmission lines are there in operation between the Western and ERCOT Interconnections? A) 2 B) 0 C) 5 D) 3 - CORRECT ANSWERS ✔✔B) 0 Match the Interconnection with the approximated size in MWs.
✔✔B) Comparing how well a Balancing Area's ACE performs in conjunction with the Frequency Error of the Interconnection In the ACE equation β represents which of the following? A) Frequency Bias B) Frequency C) MW D) Scheduled Interval - CORRECT ANSWERS ✔✔A) β is the Frequency Bias Setting (MW/0.1 Hz) for the Balancing Authority. The constant factor 10 converts the frequency setting to MW/Hz Each Balancing Authority is required to balance its resources and demand in real‐time so that its clock‐minute average of its Area Control Error (ACE) does not exceed its BAAL for more than how long? A) 15 clock minutes B) 30 minutes C) 25 consecutive clock minutes
D) 30 consecutive clock minutes - CORRECT ANSWERS ✔✔D) 30 consecutive clock minutes (NIA - NIS) - 10 β (FA - FS) - IME is the formula for the __________ equation? - CORRECT ANSWERS ✔✔ACE (Area Control Error) Equation The Contingency Event Recovery Period is _______ minutes. A) 30 mins B) 60 mins C) 90 mins D) 15 mins - CORRECT ANSWERS ✔✔D) 15 Each Balancing Area or Reserve Sharing Group must review it's Contingencies on at least a/an __________ basis. A) Semi Annually B) Annually
If you have a DCS event and 40 seconds later you have another event and the total amount exceeds your MSSC, how is the compliance calculation handled? A) They are treated as a single event and reported but not subject to the compliance calculation B) They are treated as different events and reported but not subject to the compliance calculation C) They are treated as a single event but not reported and not subject to the compliance calculation D) They are treated as different events and not reported but subject to the compliance calculation - CORRECT ANSWERS ✔✔A) They are treated as a single event and reported but not subject to the compliance calculation If the MSSC for a BA is 800 MW, what is the DCS reporting threshold? A) 240 MW B) 640 MW C) 840 MW
A BA that is part of a multiple BA Interconnection that is not receiving overlap regulation and uses a fixed Frequency Bias Setting must have its calculated setting validated by the - CORRECT ANSWERS ✔✔ERO (Electric Reliability Organization) The Frequency Bias Setting for a Balancing Area must be expressed in? A) MW/0.1 Hz B) MW/0.5 Hz C) MW/0.01 Hz D) MW/0.05 Hz - CORRECT ANSWERS ✔✔A) MW/0.1 Hz Units with nameplate ratings of _____ or greater should be equipped with governors. A) 25 MW B) 15 MW
The MSSC for your BA is 650 MW. Your reporting threshold is > 520 MW. (650 x 80%). What is the percent of recovery for the following situation? Loss of a 575 MW unit Pre-disturbance Ace = 150 MW Post-recovery Ace = 10 MW - CORRECT ANSWERS ✔✔+150 + (-
/equal to 520 MW. (650 x 80%) What is the percent of recovery for the following situation? Loss of a 600 MW unit Pre-disturbance Ace = 150 MW Post-recovery Ace = -50MW - CORRECT ANSWERS ✔✔+150 + (-
Units with nameplate ratings of 10 MW or greater should be equipped with governors which have a droop of ______% - CORRECT ANSWERS ✔✔5%, All of the reasons listed below can be a cause of inadvertent accumulation except - CORRECT ANSWERS ✔✔Market response Each Balancing Area shall operate its AGC on ______, unless such operation is adverse to system or Interconnection reliability. - CORRECT ANSWERS ✔✔Tie-Line Frequency Bias If a BA is unable to calculate ACE for more than _________ it shall notify its RC - CORRECT ANSWERS ✔✔30 minutes As a minimum, the BA must provide its System Operators with real-time values for all of the following except ______ with each adjacent BA. - CORRECT ANSWERS ✔✔MVAR flows Your BA has a Net Scheduled Interchange of 500 MW and your Actual Interchange is 750MW. The frequency bias setting for your BA is -45 MW/0.10 Hz. The actual frequency is 60.02 HZ. What is your ACE? what is the formula? - CORRECT ANSWERS ✔✔259 MW ACE= N(IA) - N(IS) - [10(B)[(F(a) - F(s)) - Ime
Balancing Areas utilize AUTOMATIC GENERATION CONTROL (AGC) to_____? - CORRECT ANSWERS ✔✔Adjust balancing authority area's demand and resources to help maintain the reporting ACE The MSSC for your BA is 650 MW. A defined disturbance for DCS reporting would be equal to how many MWs? - CORRECT ANSWERS ✔✔520MW Defined disturbance for DCS- MSSC(80%) = 650(80%) = 520 What is the ACE based on the following information? NIa = 350 I ME = 0 NIs = 50 FA = 59. Bias -250MW/0.1 Hz - CORRECT ANSWERS ✔✔250 MW Control Performance Standard 2(CPS 2) was replaced as a Balancing Authority performance measure by which of the following measures? - CORRECT ANSWERS ✔✔BAAL (Balancing Authority ACE Limit) What is not a cause of inadvertent accumulation? - CORRECT ANSWERS ✔✔Market Response
Each Distribution Provider (DP) shall comply with all operating instructions issued by the _________________, including shedding firm load, unless such actions would violate safety, equipment, regulatory or statutory requirements. - CORRECT ANSWERS ✔✔Balancing Authority If a Transmission Operator has an anticipated emergency condition, it shall inform? - CORRECT ANSWERS ✔✔RC (Reliability Coordinator) BA (Balancing Authority TOPs (Transmission Operators Each Balancing Authority and Transmission Operators shall provide Operating Plans for next-day operations with its - CORRECT ANSWERS ✔✔RC (Reliability Coordinator) Transmission Operators shall notify entities identified in their next-day operating of the following: - CORRECT ANSWERS ✔✔Their role in the plan Each BA shall have an Operating Plan for the next day that addresses all of the following EXCEPT - CORRECT ANSWERS ✔✔Transmission Outages Each Generator Operator shall provide outage information daily to its _____________ for scheduled generator outages planned for the next day.
What two pieces of information must each Reliability Coordinator, Transmission Operator, and Balancing Authority have available to predict the system's near-term load pattern? - CORRECT ANSWERS ✔✔Weather forecasts and past load patterns You are in your control center on night shift. You receive an updated weather forecast for the operating day that indicates the weather is forecast to be 5 degrees hotter. What should you do? - CORRECT ANSWERS ✔✔Review the load forecast to determine if any change in the load forecast is required and if the system is appropriately scheduled Each Reliability Coordinator, Transmission Operator, and Balancing Authority shall monitor all of the following except? - CORRECT ANSWERS ✔✔Generator output (only Generator Operator can monitor Generator Output) Each Generator Operator shall inform its ___________________ and the Transmission Operator of all generation resources available for use. - CORRECT ANSWERS ✔✔Hosting Balancing Authority Who must a Transmission Operator notify if it disconnects an overloaded facility? - CORRECT ANSWERS ✔✔It's RC and Neighboring TOP's impacted by the disconnection. If the Reliability Coordinator has determined the actions taken to address an IROL (Interconnection operating limit) or SOL (System operating limit) violation are not appropriate or
sufficient, what must it do? - CORRECT ANSWERS ✔✔Direct actions required to return the system to within limits. After any event that results in an IROL violation, the Transmission Operator shall return its transmission system to within IROL as soon as possible, but not longer than _____ minutes. A) 15 mins B) 30 mins C) 45 mins D) 10 mins - CORRECT ANSWERS ✔✔B) 30 minutes A __________ shall take all appropriate actions up to and including shedding firm load, or directing the shedding of firm load, in order to return the system from an IROL or SOL? - CORRECT ANSWERS ✔✔Transmission Operator If there is a difference in derived operating limits the Transmission Operators shall - CORRECT ANSWERS ✔✔Operate to the most limiting parameter
