PS1: LOAD FLOW STUDIES

Which type of bus is responsible for balancing the active and reactive power in a power system during load flow analysis?

• PQ Bus

• PV Bus

• Reference Bus

• Slack Bus

Why is the Fast Decoupled method often preferred over Newton-Raphson in large systems?

• Newton-Raphson is faster

• Fast Decoupled is used for small systems only

• Fast Decoupled is faster than Newton-Raphson

• PV buses are not allowed in Fast Decoupled

What generally happens to the bus voltage when the reactive power load increases at that bus?

• Voltage increases

• Voltage remains constant

• Voltage decreases

• System becomes more stable

Which type of graph is used in this lab to observe the relationship between reactive power and voltage?

• P-V Curve

• V-Q Curve

• Q-V Curve

• X-Y Curve

In PowerWorld Simulator, how is line loading visually represented?

• Voltage tables

• Line diagrams only

• Pie charts

• Bar charts

Which of the following is true about PQ buses in load flow analysis?

• Voltage and angle are specified

• Real and reactive power are specified

• Only reactive power is specified

• Real power and voltage are specified

What is the purpose of inserting a switched shunt (capacitor) into a power system in PowerWorld?

• To increase system frequency

• To regulate voltage using reactive power injection

• To reduce active power demand

• To isolate faulted lines

Why is Bus 6 considered the most sensitive in the Q-V analysis of the 9-bus system?

• It has the highest initial voltage

• It is closest to the generator

• It collapses first as reactive load increases

• It has no shunt compensation

Which of the following is a correct sequence to start a Newton-Raphson power flow simulation in PowerWorld?

• Open Edit Mode > Insert Graph

• Start > Solve > Load CSV

• Run Mode > Solve Power Flow – Newton

• Compile Code > Run Network

What is the advantage of using PowerWorld’s animated display during load flow analysis?

• Shows real-time animated power flow

• Limits line current

• Avoids voltage collapse

• Prevents overloads