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1
GATE EE 2015 Set 1
MCQ (Single Correct Answer)
+1
-0.3
Consider a $$HVDC$$ link which uses thyristor based line commutated converters as shown in the figure. For a power flow of $$750$$ $$MW$$ from System $$1$$ to System $$2,$$ the voltages at the two ends, and the current, are given by: $${V_1} = 500\,kV,\,\,{V_2} = 485\,kV\,\,$$ and $$\,{\rm I} = 1.5\,kA.\,\,$$ If the direction of power flow is to be reversed (that is, from System $$2$$ to System $$1$$) without changing the electrical connections, then which one of the following combinations is feasible? GATE EE 2015 Set 1 Power System Analysis - High Voltage Dc Transmission Question 1 English
A
$${V_1} = - 500\,kV,\,\,\,{V_2} = - 485\,kV$$ and $$\,\,\,{\rm I} = 1.5\,kA$$
B
$${V_1} = - 485\,kV,\,\,\,{V_2} = - 500\,kV$$ and $$\,\,\,{\rm I} = 1.5\,kA$$
C
$${V_1} = 500\,kV,\,\,\,{V_2} = 485\,kV$$ and $$\,\,\,{\rm I} = -1.5\,kA$$
D
$${V_1} = - 500\,kV,\,\,\,{V_2} = - 485\,kV$$ and $$\,\,\,{\rm I} = -1.5\,kA$$
2
GATE EE 2010
MCQ (Single Correct Answer)
+1
-0.3
Power is transferred from system $$A$$ to system $$B$$ by an $$HVDC$$ link as shown in the figure. If the voltage $${V_{AB}}$$ and $${V_{CD}}$$ are as indicated in the figure, and 1 > 0, then GATE EE 2010 Power System Analysis - High Voltage Dc Transmission Question 2 English
A
$${V_{AB}}\, < \,0,\,\,{V_{CD}}\, < 0,\,\,{V_{AB}}\, > \,{V_{CD}}$$
B
$${V_{AB}}\, > \,0,\,\,{V_{CD}}\, > 0,\,\,{V_{AB}}\, < \,{V_{CD}}$$
C
$${V_{AB}}\, > \,0,\,\,{V_{CD}}\, > 0,\,\,{V_{AB}}\, > \,{V_{CD}}$$
D
$${V_{AB}}\, > \,0,\,\,{V_{CD}}\, < 0,\,\,{V_{AB}}\, > \,{V_{CD}}$$
3
GATE EE 2007
MCQ (Single Correct Answer)
+1
-0.3
Two regional system, each having several synchronous generators and loads are interconnected by an ac line and a HVDC link as shown in the figure. Which of the following statements is true in the steady state: GATE EE 2007 Power System Analysis - High Voltage Dc Transmission Question 3 English
A
Both regions need not have the same frequency
B
The total power flow between the regions (Pac + Pdc) can be changed by controlling the HVDC converters alone
C
The power sharing between the ac line and the HVDC link can be changed by controlling the HVDC converters alone.
D
The directions of power flow in the HVDC link (Pdc) cannot be reversed.
4
GATE EE 2006
MCQ (Single Correct Answer)
+1
-0.3
An HVDC link consists of rectifier, inverter transmission line and other equipments. Which one of the following is true for this link?
A
The transmission line produce/supplies reactive power
B
The rectifier consumes reactive power and the inverter supplies reactive power from/to the respective connected consumes
C
Rextifier supplies reactive power and the inverted consumes reactive power to/from the respective connected AC systems
D
Both the converters (rectifier and inverter) consume reactive power from the respective connected AC systems.
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GATE EE Subjects
Electromagnetic Fields
Time Varying Fields Electrostatics Magnetostatics
Signals and Systems
Linear Time Invariant Systems Continuous and Discrete Time Signals Continuous Time Signal Fourier Transform Continuous Time Periodic Signal Fourier Series Discrete Time Signal Z Transformation Miscellaneous Continuous Time Signal Laplace Transform Sampling Theorem
Engineering Mathematics
Calculus Vector Calculus Linear Algebra Differential Equations Probability and Statistics Transform Theory Complex Variable Numerical Methods
General Aptitude
Verbal Ability Numerical Ability
Power Electronics
Choppers and Commutation Techniques Ac Voltage Controllers Single and Three Phase Rectifier Power Semiconductor Devices Inverters
Power System Analysis
Parameters and Performance of Transmission Lines Power Generation Cost Power System Stability Symmetrical Components and Symmetrical and Unsymmetrical Faults Circuit Breaker Switch Gear and Protection Per Unit System Load Flow Studies High Voltage Dc Transmission Generating Power Station
Analog Electronics
Diode Circuits and Applications Frequency Response Bjt and Mosfet Biasing 555 Timer Feedback Amplifiers and Oscillator Circuits Operational Amplifier Small Signal Modeling
Control Systems
Time Response Analysis Block Diagram and Signal Flow Graph Polar Nyquist and Bode Plot State Variable Analysis Root Locus Techniques Basics of Control System Routh Hurwitz Stability Controller and Compensator
Digital Electronics
Boolean Algebra Logic Gates Combinational Circuits Minimization Logic Families and Memories Sequential Circuits Analog to Digital and Digital to Analog Converter Microprocessor
Electrical Machines
Induction Machines D.C Machines Synchronous Machines Transformers
Electric Circuits
Three Phase Circuits Transient Response Graph Theory Two Port Networks Sinusoidal Steady State Analysis Network Elements Network Theorems
Electrical and Electronics Measurement
Basic of Indicating Instruments Error Analysis and Measurement Measurement of Resistance and A.C Bridges Measurement of Energy and Power Digital Voltmeters Questions Potentiometer and Instrument Transformers Cathode Ray Oscilloscope
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