TeeGrades

A transmission line is operating with a voltage phase angle different of 30 degrees between the sending Vs and the receiving bus Vr. If the receiving end load is suddenly increased, the voltage phase angle difference will be? - The phase angle will increase. When load is increased phase angle will increase. A load has a power factor of 0.9 lagging. If the load draws 100 MVA, what is the MW draw? - 90 pf= mw/mva The high side of a delta-wye connection transformer is connected to a pow...

Adjacent Balancing Authority - A BA whose BA area is interconnected with another BA area either directly or via a multi-party agreement or transmission tariff Adverse Reliability Impact - The impact of an event that results in frequency-related instability, unplanned tripping of load or generation, or uncontrolled separation or cascading outages that affect a widespread area of the interconnection. A-Index - A measure of the expected geomagnetic activity based on solar observations ...

What percentage of load gives a 1 Hz change in an island condition? - 6-10% (Think 6-10 day island vacation) If ACE is Zero but system Hz is off, what should a system operator do? - Nothing! ACE bias and interchange schedule will improve frequency If ACE is Zero, why not adjust generation to help frequency? - Could overload equipment, this is a NERC violation When restoring from blackout condition, what should be done with load? - All load breakers should be opened, load sho...

What is the calculation used for determining inadvertent interchange? - Net actual interchange minus net scheduled interchange Which of the following would be a suitable use for a pseudo-tie? - Accounting for jointly owned generators Which of the following entities may a Balancing Area provide interchange transaction information to? - PSEs involved in the transaction Which of the following elements are NOT contained in the interchange transaction TAG? - Cost A Balancing A...

1. If a 500 kV transmission line with a surge impedance loading of 800 MW is currently loaded at 1400 MW, which of the following events would most likely occur? a. Generator MVAR output would increase b. All system capacitors would trip off-line c. Generator MVAR output would decrease d. All automatic reactors would connect to the system - a. Generator MVAR output would increase 2. When system conditions are such that emergency procedures are expected to be implemented, which of the ...

According to Nerc Standards, an emergency interchange transaction can be exempt from tagging if it is less than_________________ - 60 minutes A BA or LSE that requests an EEA 3 must complete and EEA 3 report and submit it to the RC within how many days - 2 business days During restoration efforts load pick-ups should not exceed_____________ percentage of synchronized generation capacity - 5% What are the two components that a system operator should be aware of for controlling f...

Operating reserve may be provided by which of the following? A. LTCs B. Capacitor banks C. Voltage regulators D. Interruptible loads - D. Interruptible loads Which of the following is the responsibility of a reserve sharing group (RSG)? A. Complying with DCS as if it was a single control area B. Proving regulation service for neighboring RSGs C. Ensuring each control area in the group maintains 50% blackstart capability D. Complying with the control performance standards as if it w...

According to the NERC Functional Model, there is no difference between the function and the entity. A) True B) False - B) False True/False Analysis type questions are designed to be the least complex from a human cognitive process. A) True B) False - 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 - B) False True/False The NERC Functional Mode...

The Reliability Coordinator just informed you of a slow time error correction which will begin at the top of the next hour. Your EMS system will not let you change your scheduled frequency. Your Frequency Bias Setting is -100 MW/.1Hz. What action should you take? A) Increase Net Interchange Schedule by 20 MWs. B) Inform the Reliability Coordinator that you cannot participate in the time error correction. C) Decrease Net Interchange Schedule by 20 MWs. D) Increase Net Interchange Sche...

Common standard time period for station battery to handle outage of AC power to chargers - 8-12 hours Time to restore data exchange redundancy when redundancy testing by RC/TOP/BA deemed unsuccessful - 2 hours Transition period to backup control facility (fully functioning) - 2 hours Annual testing of backup control facility must prove to be functional for this long - 2 hours Every 2 years TO/TOP/DSP must provide how many hours of system restoration training to field swit...

A misoperation occurred when an overhead ground wire on a 230KV transmission line between two substations broke and fell across A phase of the line. One of the line circuit breakers failed to open causing the breaker failure relay to pick up and as a result tripped the entire substation bus off line that the failed circuit breaker was feeding off of. Who is charged with the responsibility to develop procedures to ensure misoperations are reviewed and analyzed to determine proper mitigation plans...

60 minutes - According to Nerc Standards, an emergency interchange transaction can be exempt from tagging if it is less than_________________ 2 business days - A BA or LSE that requests an EEA 3 must complete and EEA 3 report and submit it to the RC within how many days 5% - During restoration efforts load pick-ups should not exceed_____________ percentage of synchronized generation capacity load and generation - What are the two components that a system operator should be a...

BAL-001-0.1a - Real Power Balancing Control Performance BAL-STD-002-0 - Operating Reserves (WECC) BAL-003-0.1b - Frequency Response and Bias BAL-004-0 - Time Error Correction BAL-004-WECC-01 - Automatic Time Error Correction BAL-005-0.1b - Automatic Generation Control BAL-006-2 - Inadvertent Interchange COM-001-1.1 - Telecommunications COM-002-2 - Communications and Coordination CIP-001-1a - Sabotage Reporting CIP-002-3 - Cyber Secur...

EDE - Energy Deficient Entity Ime - meter error DCS - Disturbance Control Standard DFRs - Digital Fault Recorder LOFT - Linear on the fly testing SCADA - Supervisory Control and Data Acquisition EMS - Emergency Management System SPS - Special Protection Systems ACE - Area Control Error Fs - frequency Schedule RCIS - Reliability Coordinator Information System IDC - Interchange Distribution Calculator PSE - Purchasing Selli...

How much load reduction to change frequency - 6-10% Load reduction = 1HZ Frequency change same direction Largest Load block to pick up during sys resto - 5% of online generation Ratio of Voltage change to load change - 5% change in Voltage=3% change in load (distribution only) Power Losses on Line - I squared * R DOE Reporting Conditions - 300 MW uncontrolled loss of load 100MW Firm load shed 50,000 customers out of power greater than 1 hr 3% Voltage reduction Publ...

What percentage of load gives a 1 Hz change in an island condition? - 6-10% (Think 6-10 day island vacation) If ACE is Zero but system Hz is off, what should a system operator do? - Nothing! ACE bias and interchange schedule will improve frequency If ACE is Zero, why not adjust generation to help frequency? - Could overload equipment, this is a NERC violation When restoring from blackout condition, what should be done with load? - All load breakers should be opened, load sho...

A Balancing Authority notices that Operating Reserve has steadily declined throughout the hour. What is the most likely cause? a) Loss of a large generator in the area b) An inaccurate load forecast c) Loss of a major transmission line d) A malfunction of EMS - b) An inaccurate load forecast Balancing Area A notices that the Interconnection frequency is 59.94 Hz and their ACE is 0. Which of the following could be the cause of this reading? a) A net under-generation in Balancing Ar...

Accelerating Power - In a GENERATOR, the difference between the MECHANICAL INPUT POWER and the electrical output POWER (assuming no LOSSES). For a GENERATOR's TORQUE ANGLE to change, the GENERATOR must have accelerating POWER. Accumulated Inadvertent - The accumulation over time of INADVERTENT ENERGY. The accumulated inadvertent account of a BALANCING AUTHORITY represents the amount of excess ENERGY a BALANCING AUTHORITY has either supplied to the INTERCONNECTION or absorbed from the I...

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