Chapter 9 · MCQ Read Mode

Power System Analysis

The series parameters of a transmission line equivalent circuit are:

GMR (Geometric Mean Radius) is used in transmission line calculations to account for:

Capacitance calculation for a transmission line uses:

Transposition of transmission line conductors is performed to:

Skin effect in an AC conductor refers to: resistance

Proximity effect in transmission line conductors becomes more significant when:

Corona inception voltage is the threshold at which:

Bundled conductors are used on EHV lines primarily to:

In the per unit system, base impedance is calculated as:

A single-line diagram is used to represent a power system because:

A short transmission line (up to ~80 km) is typically modeled using:

A long transmission line (greater than about 250 km) is most accurately modeled using:

For a symmetrical transmission line represented by ABCD parameters:

For a passive, reciprocal two-port network represented by ABCD parameters, the identity that must hold is:

In the ABCD parameter representation, the constant B has units of:

The Ferranti effect occurs when:

Surge Impedance Loading (SIL) is defined as the power delivered when a line is terminated in a resistive load equal to:

At Surge Impedance Loading, a transmission line operates at:

Loading a long transmission line below its SIL tends to cause:

Loading a long transmission line above its SIL tends to cause:

The method of symmetrical components resolves an unbalanced 3-phase phasor set into:

Positive sequence components have a phase rotation that is:

Zero sequence current requires, for it to flow in a power system:

In an ungrounded (or high-impedance grounded) system, a single line-to-ground fault typically results in:

A single line-to-ground (L-G) fault is analyzed by connecting the three sequence networks:

A line-to-line (L-L) fault, with no ground involvement, does NOT involve:

A double line-to-ground (L-L-G) fault is represented by connecting the three sequence networks:

A three-phase fault (L-L-L) is unique among fault types in that it:

Among common fault types, the three-phase fault generally produces:

A solidly (effectively) grounded system, compared to an ungrounded system, during a ground fault typically exhibits:

In the Y-bus matrix, the diagonal element Yii represents:

In the Y-bus matrix, an off-diagonal element Yij (for buses i and j with no direct connection) is:

A slack (swing) bus in a load flow study is characterized by:

A PV (generator) bus in a load flow study has which quantities specified?

The Gauss-Seidel load flow method updates bus voltages by:

A key drawback of the Gauss-Seidel method for load flow is:

The Newton-Raphson load flow method linearizes the power flow equations at each iteration using:

Compared to Gauss-Seidel, the Newton-Raphson method generally offers:

The Fast Decoupled Load Flow method simplifies computation by exploiting the typical relationship that:

Newton-Raphson is generally preferred over Gauss-Seidel for large-scale practical power system load flow studies because of its:

Steady state stability limit refers to the maximum power transfer possible:

Transient stability assessment following a disturbance typically focuses on:

The swing equation relates a generator's angular acceleration to:

If a generator's mechanical input power exceeds its electrical output power, the rotor:

The equal area criterion assesses transient stability by comparing:

The equal area criterion is commonly used to determine:

Fast fault clearing improves transient stability primarily by:

Which of the following is a stability enhancement technique?

Voltage collapse is best described as: power support

Reducing the transfer reactance of a transmission path (e.g. via series compensation) generally helps stability by:

Real power flow through a predominantly reactive transmission line is primarily controlled by:

Reactive power flow through a predominantly reactive transmission line is primarily controlled by:

The angle-real-power / magnitude-reactive-power decoupling is the physical basis for:

Series compensation of a transmission line primarily works by:

A key risk associated with series capacitor compensation is:

Shunt capacitor banks connected at a bus primarily serve to:

Shunt reactors are typically used at the receiving end of a lightly-loaded long line to:

Compared to fixed or mechanically-switched shunt compensation, dynamic devices such as SVC/STATCOM offer:

Maximum real power transfer over a line (for a given voltage magnitude) generally occurs near an angle difference of:

A synchronous condenser used for VAR compensation is essentially: