Example 8.11. Each line of a 3-phase system is suspended by a string of 3 indentical insulators of self-capacitance Cfarad. The shunt capacitance of connecting metal work of each insulator is 0.2 C to earth and 0-1 C to line. Calculate the string efficiency of the system if a guard ring increases the capacitance to the line of metal work of the lowest insulator to 0.3 C.

Example 8.11. Each line of a 3-phase system is suspended by a string of 3 indentical insulators of self-capacitance Cfarad. The shunt capacitance of connecting metal work of each insulator is 0.2 C to earth and 0-1 C to line. Calculate the string efficiency of the system if a guard ring increases the capacitance to the line of metal work of the lowest insulator to 0.3 C.

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

Chapter4: Transmission Line Parameters

Section: Chapter Questions

Problem 4.26MCQ: Does r=e14r=0.788r, which comes in calculation of inductance, play a role in capacitance...

See similar textbooks

Related questions

Q: Schering Bridge is used to find ____________. a. capacitance b. pressure c. inductance…

A: Schering Bridge is used to find ____________. a. capacitance b. pressure c.…

Q: A 33 kV, 50 Hz. 3-phase underground cable, 6 km long uses three single core cables. Each of the…

A: We have been given an 33 KV 50 Hz 3-phase underground cable as, Length (l) = 6 Km = 6000 m Line…

Q: GMR calculate

A: Step 1:Step 2:Step 3:Step 4:

Q: 4. The value of a at OdegC of a conductor is 1/236 per ind the value of a 18degC.

Q: Write a report on the Star connection for three phase load experiment using the data/results from…

Q: Over sting of 3- phase tran smission line has 4 insulators and Ce=0.15C. If the voltage between the…

Q: For transferring electrical power at 220 kV, six conductors of ACSR Drake constitute a 60Hz double…

A: Considering complexity of the solution, we are answering the first t0w subparts, please repost your…

Q: Compare the effect of varying resistance, capacitance and inductance in parallel and series AC…

A: Note: circuit compenets are not specified. we assume following AC circuits RLC parallel circuit RLC…

Concept explainers

Compensation Techniques

The compensation techniques are the methods that are employed in the electrical control systems to enhance the performance of the system. The performance are generally affected by the factors like lag in the compensating devices, slow response of the system of the components like sensors used in the control system. The basic compensation technique involves lag compensation, lead compensation or the combination of the both.

Question

Example 8.11. Each line of a 3-phase system is suspended by a string of 3 indentical insulators
of self-capacitance C farad. The shunt capacitance of connecting metal work of each insulator is 0.2
C to earth and 0-1 C to line. Calculate the string efficiency of the system if a guard ring increases the
capacitance to the line of metal work of the lowest insulator to 0.3 C.

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1

Step 2

Step 3

Step 4

Step by step

Solved in 4 steps with 4 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Compensation Techniques in Transmission Line

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, electrical-engineering and related others by exploring similar questions and additional content below.

Similar questions

In an outdoor substation the three bus-bar conductors are supported by units of post type insulators. Each unit consists of a stack of 3 pin type insulators fixed one on the top of the other. The voltage across the lowest insulator is 15kV and that across the next unit is 12kV. Estimate: ratio of mutual to self-capacitance i. the bus-bar voltage of the substation. Efficiency across the string of insulators ii. iii.
Does r=e14r=0.788r, which comes in calculation of inductance, play a role in capacitance computations? Yes No
Q.4/ choose true or false: 1. The reluctance of any core is proportional directly with the length of it and inversely with both the permeability and the cross-section area of it. 2. The number of parallel paths in wave windings is equal to twice of the number of poles. 3. In dc machines with same values of Z, N, Ø, the emf for wave winding type is more than emf of lab winding type. 4. If we insert a current in such a conductor subjected to a constant magnetic field, a movement will achieved giving the principle of electric generator.
hi all could you please solve this problem atta
(5) Primary AC Source Transformer Secondary AC/DC Full-wave Rectifier Capaictor in Non- linear Load Figure 6 Analyse different methods of harmonics mitigation to eliminate the harmonic, which you have identify in above power system circuit. You can use harmonic filters, K or equivalent transformers or oversized neutral method depending upon the harmonic sources.
Full calculation with any assumption needed. All sub questions please as it is all related.
Id is : 510221
One thousand circular mils or 1 kcmil is sometimes designated by the abbreviation MCM75C. Data for commercial bare-aluminum electrical conductors lists a 60 Hz resistance of 0.0080 ohm per kilometer at for a 793-MCM AAC conductor. Determine the cross-sectional conducting area of this conductor in square meters. Find the 60 Hz resistance of this conductor in ohms per kilometer at 50C.
Q20. The section bus-bars A and B as shown in Figure B5 are linked by a bus-bar reactors each rated at 5000 kVA with 10% reactance. On bus-bar A, there are two generators each of 10,000 kVA with 10% reactance and on B two generators each of 8000 kVA with 12 % reactance. Find the Current and MVA that fed into a dead short circuit between all phases on B with bus-bar reactor in the circuit. Page 4 of 5 جامعة التقنية والعلومر التطبيقية بإبراء University of Technology and Applied Sciences - Ibra Student ID: Section: Student Name: 8,000 kVA 12% 10,000 kVA 10,000 kVA 10% 8,000 kVA 12% 10% 2 3 5,000 kVA 10% lell 8,000 kVA 10% Figure B5 "End of Question Paper"