4. A CT with an excitation curve given in the figure has a rated current ratio of 500:5 A and a secondary leakage impedance of 0.1 +j0.5 ohms. Calculate the CT secondary output current and the CT error for the following cases: a.) The impedance of the terminating device is 4.9 +j 0.5 ohms and the primary CT load current is 400 A. b.) The impedance of the terminating device is 4.9 +j0.5 ohms and the primary CT load current is 1200 A c.) The impedance of the terminating device is 14.9 +j 1.5 ohms and the primary CT fault current is 400 A. d.) The impedance of the terminating device is 14.9 +j 1.5 ohms and the primary CT fault current is 1200 A w 100 80 60 40 20 10 Secondary exciting volts-E'

4. A CT with an excitation curve given in the figure has a rated current ratio of 500:5 A and a secondary leakage impedance of 0.1 +j0.5 ohms. Calculate the CT secondary output current and the CT error for the following cases: a.) The impedance of the terminating device is 4.9 +j 0.5 ohms and the primary CT load current is 400 A. b.) The impedance of the terminating device is 4.9 +j0.5 ohms and the primary CT load current is 1200 A c.) The impedance of the terminating device is 14.9 +j 1.5 ohms and the primary CT fault current is 400 A. d.) The impedance of the terminating device is 14.9 +j 1.5 ohms and the primary CT fault current is 1200 A w 100 80 60 40 20 10 Secondary exciting volts-E'

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter3: Power Transformers

Section: Chapter Questions

Problem 3.30P: Reconsider Problem 3.29. If Va,VbandVc are a negative-sequence set, how would the voltage and...

See similar textbooks

Similar questions

Is it possible to measure the phase-shift angle in an AC single-phase circuit by an indirect method using an ammeter and a voltmeter? - Yes, but an instrument must be added to measure the active resistance of the load. - Yes, but an instrument must be added to measure the active power dissipated by the load. - Yes, but an instrument must be added to measure the frequency.
Discuss the challenges and solutions related to power system stability and control, especially in the presence of renewable energy sources.
a) For the 2-Bus AC system given in Figure (a) find V1 (amplitude and angle). All the values are given in p.u. Note: Mind complex power concept! b) For the HVDC equivalent circuit given in Figure (b) calculate V2. All the values are given in p.u.
Define the harmonic frequency and interharmonic frequency used in power system quality.
Describe the concept of power system harmonics and their mitigation techniques.
• Zh = 100 ohm • Draw the pu reactance diagram by taking Ut(base) = 132kV, St(base) = 100MVA. If the 33 kV busbar voltage is kept constant at 30 kV and 0.8 inductive 50 MVA power is drawn from this bus, what is the voltage at the synchronous machine ends?
Construct the circuit in Figure 1 in the Circuit JS simulator. Note that the voltage source is given in RMS. Within Circuit JS while defining the max voltage of the voltage source include “rms” after the number to tell Circuit JS that this is a rms value. Also note that there are additional parameters when instantiating a transformer in Circuit JS. Leave these at the default values. Additionally, transformers may have problems simulating in Circuit JS. Answer the following: 1. From the simulation results, determine the power dissipated in R2 and compare to the expected value from the previous section.2. Change the transformer ratio (“Ratio” as a fraction when you “Edit…” the transformer component) to the value calculated in the previous section to provide maximum power transfer in R2. Note: In Circuit JS, Transformer Ratio = Primary/Secondary.3. Rerun the simulation, calculate the power dissipated in R2 and compare to the expected value from the previous section.4. Change the…
Explain the concept of power system stability and the role of control strategies such as FACTS devices and HVDC systems.
Describe real and reactive power regulation
Power System analysis subject
Describe the concept of power system harmonics and their impact on the quality of electrical supply.
A non-sinusoidal quasi-square wave voltage v(t) is applied to a nonlinear load, resulting in a non-sinusoidal current i(t). The voltage and current waveforms are shown below. Assume any values of your choice for Vp (≤ 200 V) and Ip (≥ 5 A). 1. calculate the average power and net power factor of the load. 2. The total load harmonic distrotion (THD) of the load current, assuming the smallest frquency term as fundamental.