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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 the Newton Raphson load flow technique, the power system is modeled as a set of bus nodes interconnected by transmission lines. Each bus can be classified as a slack bus (PV), a generator bus (PV), or a load bus (PQ). The PV buses have known voltage magnitudes and specified active and reactive power injections, while the PQ buses have specified active and reactive power injections but unknown voltage magnitudes and angles.
Given:
Total number of buses = 100
Number of generators = 10
In the given iteration:
Two PV buses are converted to PQ type.
Explanation of option B:
According to the given option, the number of unknown voltage angles remains unchanged and the number of unknown voltage magnitudes increases by two.
Reasoning:
To understand the reasoning behind this option, let's analyze the changes in the system after converting two PV buses to PQ type.
1. Number of PV buses:
Initially, there were 10 generator buses (PV buses). After converting two of them to PQ type, there will be 8 generator buses (PV buses) remaining in the system.
2. Number of PQ buses:
Initially, there were no PQ buses in the system. After converting two PV buses to PQ type, there will be two PQ buses added to the system.
3. Number of unknown voltage angles:
The unknown voltage angles are associated with the PV and PQ buses. Since the conversion from PV to PQ type does not change the number of PV buses, the number of unknown voltage angles remains unchanged.
4. Number of unknown voltage magnitudes:
The unknown voltage magnitudes are associated with the PV and PQ buses. When two PV buses are converted to PQ type, the unknown voltage magnitudes associated with those buses are no longer unknown. Therefore, the number of unknown voltage magnitudes increases by two.
Conclusion:
Based on the analysis, it can be concluded 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 the Newton Raphson load flow technique, the power system is modeled as a set of bus nodes interconnected by transmission lines. Each bus can be classified as a slack bus (PV), a generator bus (PV), or a load bus (PQ). The PV buses have known voltage magnitudes and specified active and reactive power injections, while the PQ buses have specified active and reactive power injections but unknown voltage magnitudes and angles.
Given:
Total number of buses = 100
Number of generators = 10
In the given iteration:
Two PV buses are converted to PQ type.
Explanation of option B:
According to the given option, the number of unknown voltage angles remains unchanged and the number of unknown voltage magnitudes increases by two.
Reasoning:
To understand the reasoning behind this option, let's analyze the changes in the system after converting two PV buses to PQ type.
1. Number of PV buses:
Initially, there were 10 generator buses (PV buses). After converting two of them to PQ type, there will be 8 generator buses (PV buses) remaining in the system.
2. Number of PQ buses:
Initially, there were no PQ buses in the system. After converting two PV buses to PQ type, there will be two PQ buses added to the system.
3. Number of unknown voltage angles:
The unknown voltage angles are associated with the PV and PQ buses. Since the conversion from PV to PQ type does not change the number of PV buses, the number of unknown voltage angles remains unchanged.
4. Number of unknown voltage magnitudes:
The unknown voltage magnitudes are associated with the PV and PQ buses. When two PV buses are converted to PQ type, the unknown voltage magnitudes associated with those buses are no longer unknown. Therefore, the number of unknown voltage magnitudes increases by two.
Conclusion:
Based on the analysis, it can be concluded 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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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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