Draw the schematic diagram of a double line to ground fault and basic equipment of a substation.
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Draw the schematic diagram of a double line to ground fault and
basic equipment of a substation.
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- What is the significance of fault analysis in a power system, and how is it performed?Identify different zones of protection on the power system shown in the figure. Also, predict the operation of circuit breakers for the fault location indicated by cross mark at various locations of the power system. Generator protection Circuit breaker Low-voltage-switchgear protection Power-transformer protection High-voltage-switchgeor protection Transmission-line protection High- voltage-switchgeor protectionFigure 2 shows the circuit of a simple power system. The ratings of the generators, transformers and the motors are as shown in the figure. The reactance of lines 1 and 2 are 40 ohms and 50 ohms respectively. Assume that system is unloaded, and the generators are generating their rated voltage. Select the generator G₁ ratings as base values. Choose the fault location in bus 1, bus 2, or bus 3.( Only one bus location) And give this answer For a symmetrical three phase fault on the bus 1.Draw the reactance diagram for the fault with all the reactances marked in per unit. 2.Determine the Thevenin's equivalent circuit which can be used to calculate the fault current. (3) Calculate the fault current in ampere and fault power in MVA. (4) Calculate the fault current contribution from the generator connected to the bus for fault calculation.
- What are the possible faults in underground cables. Illustrate the methods of fault localization.Describe the significance of fault analysis in power systems. How is fault current calculated, and how does it impact the protection and operation of a power system?Explain the concept of symmetrical and unsymmetrical faults in power systems. How are these faults analyzed, and what protective measures can be implemented?
- What are the problems that may encounter in advanced fault detection and diagnosis techniques for power distribution systems?Discuss the concept of fault analysis in power systems and the types of faults that can occur.(a) Write the junction rule for junction b. (b) write the loop rule for loop 1 (clockwise) and for loop 2 (clockwise).