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In a 100 bus power system, there are 10 generators. In a particular iteration of Newton Raphson load flow technique (in polar coordinates), two of the PV buses are converted to PQ type. In this iteration,
- a)the number of unknown voltage angles increases by two and the number of unknown voltage magnitudes increases by two.
- b)the number of unknown voltage angles remains unchanged and the number of unknown voltage magnitudes increases by two.
- c)the number of unknown voltage angles increases by two and the number of unknown voltage magnitudes decreases by two.
- d)the number of unknown voltage angles remains unchanged and the number of unknown voltage magnitudes decreases by two.
Correct answer is option 'B'. Can you explain this answer?
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In a 100 bus power system, there are 10 generators. In a particular it...
A bus in a power system is a line at which the several components of the power system like generators, loads, and feeders, etc., are connected.
The buses in a power system are associated with four quantities, these quantities are the following:
The magnitude of the voltage
The buses in a power system are associated with four quantities, these quantities are the following:
The magnitude of the voltage
- Phase angle
- Active power
- Reactive power
In the load flow studies, two variable are known, and the other two is to determined.
Depends on the quantity to be specified the buses are classified into three categories as follow:
The table shown below shows the types of buses and the associated known and unknown value.
Depends on the quantity to be specified the buses are classified into three categories as follow:
The table shown below shows the types of buses and the associated known and unknown value.
Generation Bus or Voltage Control Bus:
- This bus is also called the P-V bus.
- on this bus, the voltage magnitude corresponding to generate voltage and true or active power P corresponding to its rating are specified.
- Voltage magnitude is maintained constant at a specified value by injection of reactive power.
- The reactive power generation Q and phase angle δ of the voltage is to be computed.
Load Bus:
- This is also called the P-Q bus
- at this bus, the active and reactive power is injected into the network.
- The magnitude and phase angle of the voltage is to be computed.
- Here the active power P and reactive power Q are specified, and the load bus voltage can be permitted within a tolerable value, i.e., 5 %.
- The phase angle of the voltage, i.e.δ is not very important for the load.
Slack, Swing, or Reference Bus:
- Slack bus in a power system absorbs or emits active or reactive power from the power system.
- The slack bus does not carry any load.
- At this bus, the magnitude and phase angle of the voltage is specified.
- The phase angle of the voltage is usually set equal to zero.
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In a 100 bus power system, there are 10 generators. In a particular it...
Explanation:
In a Newton Raphson load flow technique, the power system is represented as a set of equations in polar coordinates. The unknowns in these equations are the voltage magnitudes and voltage angles at each bus.
Given:
- Total buses in the system = 100
- Number of generators = 10
- PV buses converted to PQ type = 2
Analysis:
In a power system, each generator is represented as a PV (constant voltage, constant power) bus. In a PV bus, the voltage magnitude and real power output are known, while the voltage angle and reactive power are unknowns.
Step 1: Calculation of unknowns
- Total number of unknown voltage angles = Total buses - Number of known voltage angles
- Total number of unknown voltage magnitudes = Total buses - Number of known voltage magnitudes
In the given system:
- Initial unknown voltage angles = 100 - 10 = 90
- Initial unknown voltage magnitudes = 100 - 10 = 90
Step 2: Conversion of PV buses to PQ type
When two PV buses are converted to PQ type, the known voltage magnitudes become unknowns, while the voltage angles remain unknown.
- Number of known voltage magnitudes = Number of generators - Number of PV buses converted to PQ type = 10 - 2 = 8
Step 3: Calculation of unknowns after conversion
- After conversion, the number of unknown voltage angles remains unchanged as the voltage angles at all buses are still unknowns.
- The number of unknown voltage magnitudes increases by two because the PV buses that were previously known now become unknowns.
Final calculation of unknowns:
- Final number of unknown voltage angles = Initial unknown voltage angles = 90
- Final number of unknown voltage magnitudes = Initial unknown voltage magnitudes + Number of unknown voltage magnitudes after conversion = 90 + 2 = 92
Conclusion:
From the above analysis, it is clear that in the given iteration of the Newton Raphson load flow technique, the number of unknown voltage angles remains unchanged, and the number of unknown voltage magnitudes increases by two. Therefore, the correct answer is option 'B'.
In a Newton Raphson load flow technique, the power system is represented as a set of equations in polar coordinates. The unknowns in these equations are the voltage magnitudes and voltage angles at each bus.
Given:
- Total buses in the system = 100
- Number of generators = 10
- PV buses converted to PQ type = 2
Analysis:
In a power system, each generator is represented as a PV (constant voltage, constant power) bus. In a PV bus, the voltage magnitude and real power output are known, while the voltage angle and reactive power are unknowns.
Step 1: Calculation of unknowns
- Total number of unknown voltage angles = Total buses - Number of known voltage angles
- Total number of unknown voltage magnitudes = Total buses - Number of known voltage magnitudes
In the given system:
- Initial unknown voltage angles = 100 - 10 = 90
- Initial unknown voltage magnitudes = 100 - 10 = 90
Step 2: Conversion of PV buses to PQ type
When two PV buses are converted to PQ type, the known voltage magnitudes become unknowns, while the voltage angles remain unknown.
- Number of known voltage magnitudes = Number of generators - Number of PV buses converted to PQ type = 10 - 2 = 8
Step 3: Calculation of unknowns after conversion
- After conversion, the number of unknown voltage angles remains unchanged as the voltage angles at all buses are still unknowns.
- The number of unknown voltage magnitudes increases by two because the PV buses that were previously known now become unknowns.
Final calculation of unknowns:
- Final number of unknown voltage angles = Initial unknown voltage angles = 90
- Final number of unknown voltage magnitudes = Initial unknown voltage magnitudes + Number of unknown voltage magnitudes after conversion = 90 + 2 = 92
Conclusion:
From the above analysis, it is clear that in the given iteration of the Newton Raphson load flow technique, the number of unknown voltage angles remains unchanged, and the number of unknown voltage magnitudes increases by two. Therefore, the correct answer is option 'B'.
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In a 100 bus power system, there are 10 generators. In a particular iteration of Newton Raphson load flow technique (in polar coordinates), two of the PV buses are converted to PQ type. In this iteration,a)the number of unknown voltage angles increases by two and the number of unknown voltage magnitudes increases by two.b)the number of unknown voltage angles remains unchanged and the number of unknown voltage magnitudes increases by two.c)the number of unknown voltage angles increases by two and the number of unknown voltage magnitudes decreases by two.d)the number of unknown voltage angles remains unchanged and the number of unknown voltage magnitudes decreases by two.Correct answer is option 'B'. Can you explain this answer?
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In a 100 bus power system, there are 10 generators. In a particular iteration of Newton Raphson load flow technique (in polar coordinates), two of the PV buses are converted to PQ type. In this iteration,a)the number of unknown voltage angles increases by two and the number of unknown voltage magnitudes increases by two.b)the number of unknown voltage angles remains unchanged and the number of unknown voltage magnitudes increases by two.c)the number of unknown voltage angles increases by two and the number of unknown voltage magnitudes decreases by two.d)the number of unknown voltage angles remains unchanged and the number of unknown voltage magnitudes decreases by two.Correct answer is option 'B'. Can you explain this answer? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about In a 100 bus power system, there are 10 generators. In a particular iteration of Newton Raphson load flow technique (in polar coordinates), two of the PV buses are converted to PQ type. In this iteration,a)the number of unknown voltage angles increases by two and the number of unknown voltage magnitudes increases by two.b)the number of unknown voltage angles remains unchanged and the number of unknown voltage magnitudes increases by two.c)the number of unknown voltage angles increases by two and the number of unknown voltage magnitudes decreases by two.d)the number of unknown voltage angles remains unchanged and the number of unknown voltage magnitudes decreases by two.Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In a 100 bus power system, there are 10 generators. In a particular iteration of Newton Raphson load flow technique (in polar coordinates), two of the PV buses are converted to PQ type. In this iteration,a)the number of unknown voltage angles increases by two and the number of unknown voltage magnitudes increases by two.b)the number of unknown voltage angles remains unchanged and the number of unknown voltage magnitudes increases by two.c)the number of unknown voltage angles increases by two and the number of unknown voltage magnitudes decreases by two.d)the number of unknown voltage angles remains unchanged and the number of unknown voltage magnitudes decreases by two.Correct answer is option 'B'. Can you explain this answer?.
In a 100 bus power system, there are 10 generators. In a particular iteration of Newton Raphson load flow technique (in polar coordinates), two of the PV buses are converted to PQ type. In this iteration,a)the number of unknown voltage angles increases by two and the number of unknown voltage magnitudes increases by two.b)the number of unknown voltage angles remains unchanged and the number of unknown voltage magnitudes increases by two.c)the number of unknown voltage angles increases by two and the number of unknown voltage magnitudes decreases by two.d)the number of unknown voltage angles remains unchanged and the number of unknown voltage magnitudes decreases by two.Correct answer is option 'B'. Can you explain this answer? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about In a 100 bus power system, there are 10 generators. In a particular iteration of Newton Raphson load flow technique (in polar coordinates), two of the PV buses are converted to PQ type. In this iteration,a)the number of unknown voltage angles increases by two and the number of unknown voltage magnitudes increases by two.b)the number of unknown voltage angles remains unchanged and the number of unknown voltage magnitudes increases by two.c)the number of unknown voltage angles increases by two and the number of unknown voltage magnitudes decreases by two.d)the number of unknown voltage angles remains unchanged and the number of unknown voltage magnitudes decreases by two.Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In a 100 bus power system, there are 10 generators. In a particular iteration of Newton Raphson load flow technique (in polar coordinates), two of the PV buses are converted to PQ type. In this iteration,a)the number of unknown voltage angles increases by two and the number of unknown voltage magnitudes increases by two.b)the number of unknown voltage angles remains unchanged and the number of unknown voltage magnitudes increases by two.c)the number of unknown voltage angles increases by two and the number of unknown voltage magnitudes decreases by two.d)the number of unknown voltage angles remains unchanged and the number of unknown voltage magnitudes decreases by two.Correct answer is option 'B'. Can you explain this answer?.
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In a 100 bus power system, there are 10 generators. In a particular iteration of Newton Raphson load flow technique (in polar coordinates), two of the PV buses are converted to PQ type. In this iteration,a)the number of unknown voltage angles increases by two and the number of unknown voltage magnitudes increases by two.b)the number of unknown voltage angles remains unchanged and the number of unknown voltage magnitudes increases by two.c)the number of unknown voltage angles increases by two and the number of unknown voltage magnitudes decreases by two.d)the number of unknown voltage angles remains unchanged and the number of unknown voltage magnitudes decreases by two.Correct answer is option 'B'. Can you explain this answer?, a detailed solution for In a 100 bus power system, there are 10 generators. In a particular iteration of Newton Raphson load flow technique (in polar coordinates), two of the PV buses are converted to PQ type. In this iteration,a)the number of unknown voltage angles increases by two and the number of unknown voltage magnitudes increases by two.b)the number of unknown voltage angles remains unchanged and the number of unknown voltage magnitudes increases by two.c)the number of unknown voltage angles increases by two and the number of unknown voltage magnitudes decreases by two.d)the number of unknown voltage angles remains unchanged and the number of unknown voltage magnitudes decreases by two.Correct answer is option 'B'. Can you explain this answer? has been provided alongside types of In a 100 bus power system, there are 10 generators. In a particular iteration of Newton Raphson load flow technique (in polar coordinates), two of the PV buses are converted to PQ type. In this iteration,a)the number of unknown voltage angles increases by two and the number of unknown voltage magnitudes increases by two.b)the number of unknown voltage angles remains unchanged and the number of unknown voltage magnitudes increases by two.c)the number of unknown voltage angles increases by two and the number of unknown voltage magnitudes decreases by two.d)the number of unknown voltage angles remains unchanged and the number of unknown voltage magnitudes decreases by two.Correct answer is option 'B'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice In a 100 bus power system, there are 10 generators. In a particular iteration of Newton Raphson load flow technique (in polar coordinates), two of the PV buses are converted to PQ type. In this iteration,a)the number of unknown voltage angles increases by two and the number of unknown voltage magnitudes increases by two.b)the number of unknown voltage angles remains unchanged and the number of unknown voltage magnitudes increases by two.c)the number of unknown voltage angles increases by two and the number of unknown voltage magnitudes decreases by two.d)the number of unknown voltage angles remains unchanged and the number of unknown voltage magnitudes decreases by two.Correct answer is option 'B'. Can you explain this answer? tests, examples and also practice Electrical Engineering (EE) tests.
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