All Questions


Warning: Trying to access array offset on false in /home3/indiakep/public_html/wp-content/plugins/dw-question-answer/inc/Template.php on line 8
All Questions › Category: Power System Analysis
Filter:AllOpenResolvedClosedUnanswered
MATLAB program to investigate the stability of one-machine – infinite bus system by solving the swing equation- Step Increase in Mechanical Power Input
AnsweredChetan Shidling asked 5 years ago • 
704 views1 answers0 votes
MATLAB code for ABCD parameters in transmission lines?
AnsweredChetan Shidling asked 5 years ago • 
3038 views1 answers0 votes
What is swing equation in power system?
OpenChetan Shidling asked 5 years ago • 
754 views0 answers0 votes
What is Ybus and Zbus in power system?
Openchetan shidling asked 6 years ago • 
824 views0 answers0 votes
Devices used to control the voltage?
OpenChetan Shidling asked 6 years ago • 
895 views1 answers0 votes
Necessity of voltage control?
OpenChetan Shidling asked 6 years ago • 
998 views1 answers0 votes
Deduce the dynamic model of a two-area power system. Hence deduce a general expression for steady-changes in frequency, generation and tie-line powers for a specified load demand changes.
Openchetan shidling asked 6 years ago • 
763 views0 answers0 votes
In the power system shown, the series line impedances are marked on the diagram and the charging admittances are negligible. Buses 1 and 2 are load buses with known real and reactive power injections as marked on the diagram. Bus 1 is slack with voltage (1.06+j0) pu. Determine the voltages at PQ buses at the end of first iteration using G-S method.
Openchetan shidling asked 6 years ago • 
845 views0 answers0 votes
Stating all the assumptions made, develop FDLF model and give the computational flow chart. Also list the salient features of FDLF.
Openchetan shidling asked 6 years ago • 
851 views0 answers0 votes
With usual notation, derive the Gauss and GS load flow models and give the flow diagram. Also explain how to handle PV bus in these methods
Openchetan shidling asked 6 years ago • 
822 views0 answers0 votes
Explain the classification of buses for load flow studies giving the significance of each. With usual notation, deduce the pi equivalent model of a fixed off-nominal tap ratio transformer for load flow studies
Openchetan shidling asked 6 years ago • 
736 views0 answers0 votes
What is meant by load flow? Briefly explain the properties required for a good load flow solution method
Openchetan shidling asked 6 years ago • 
714 views0 answers0 votes
Two power system areas A and B are interconnected and have the following characteristics: Area A: Regulation =4% rated capacity=400 MW, Area B: Regulation =6% rated capacity=500 MW Determine the steady-state frequency deviation, generation changes and tie-line power change following a increase of load demand by 50 MW in area B. Assume rated frequency as 50Hz. If another area C with Regulation =3% rated capacity=600 MW is also interconnected, determine the new values of steady-changes. Hence analyze the effect of interconnection operation on frequency changes following load disturbances
Openchetan shidling asked 6 years ago • 
906 views0 answers0 votes
Three thermal generating units are operating in parallel at 50 Hz sharing 750 MW equally and have following rated capacity (Pr) and speed regulation (R) values. Unit 1: Pr=500MW, R=6%; Unit 2: Pr=600MW, R=2.4%; Unit 3: Pr=500Mw, R=4%. Analyze the following situations and comment on the results by comparing the operating frequency and load sharing between the units when supplying a total load demand of (i) 600MW (ii) 1000MW. Also determine the minimum total load demand and the corresponding operating frequency at which the entire load is supplied by only two units. Which unit will run idle under this condition? Assume free governor operation and rated frequency of 50 Hz.
Openchetan shidling asked 6 years ago • 
918 views0 answers0 votes
Deduce the dynamic model of a two-area power system. Hence deduce a general expression for steady-changes in frequency, generation and tie-line powers for a specied load demand changes.
Openchetan shidling asked 6 years ago • 
790 views0 answers0 votes
Using the block diagram of the dynamic model of isolated power system, derive expressions for steady-state frequency deviation and change in generation for change in load demand assuming free-governor operation
Openchetan shidling asked 6 years ago • 
858 views0 answers0 votes
With the help of a neat sketch, explain the operation of a speed governor of a turbine. Also give the block schematic of load frequency control model of an isolated area
Openchetan shidling asked 6 years ago • 
789 views0 answers0 votes
Two power system areas are interconnected and have following regulation (R) and rated power (Pr) values: Area1: R =5%, Pr =1000 MW and Area 2: R =6%, Pr =800 MW. Determine the steady changes in frequency, tie-line powers and generations when the load demand in area-2 increases by 100 MW. Also analyze the effect of connecting another area-3 (R =4%, Pr =500 MW) on the steady changes in frequency, generation and tie-line powers following the same load changes as above. Comment on the results obtained. Assume free governor operation and rated frequency of 50 Hz.
Openchetan shidling asked 6 years ago • 
1006 views0 answers0 votes
What is meant by load-flow? Briefly explain the desirable properties of a good load-flow model. With usual notation, deduce the π model of a fixed off-nominal tap ratio transformer for load flow studies.
Openchetan shidling asked 6 years ago • 
1006 views0 answers0 votes
Three thermal generating units are operating in parallel at 50 Hz sharing 600 MW load equally and have following rated capacity (Pr) and speed regulation (R) values: Unit-1: Pr=450 MW, R=5.4% Unit-2: Pr=400 MW, R=1.6%; Unit-3: Pr=500 MW,R=4%; Analyze the following new loading situations by comparing the operating frequency and load sharing when supplying a total load demand of (i) 400 MW (ii) 700 MW. Assume free governor operation and rated frequency of 50 Hz.
Openchetan shidling asked 6 years ago • 
806 views0 answers0 votes
With usual notation, deduce G-S load flow model for power systems with no PV buses and give the corresponding computational flow-chart. Also give salient features of G-S load flow model.
Openchetan shidling asked 6 years ago • 
769 views0 answers0 votes
In the power system shown, bus 1 is slack with (1.05+j0) pu voltage while buses 2 and 3 are load buses with known real and reactive power injections as indicated on the diagram. With (1+j0) pu initial voltage at load buses, determine its voltage at the end of first iteration using G-S load flow model. Per-unit series impedance (neglecting resistance) of lines is marked on the diagram and neglect line charging.
Openchetan shidling asked 6 years ago • 
913 views0 answers0 votes
With a neat sketch, briefly explain the turbine speed governing system and give the dynamic model of LFC for an isolated power system area. Hence deduce an expression for steady-state frequency deviation Δf
Openchetan shidling asked 6 years ago • 
832 views0 answers0 votes
What is a tap changing transformer?
Answeredchetan shidling asked 6 years ago • 
782 views1 answers0 votes
What are the properties for a good load flow solution?
Answeredchetan shidling asked 6 years ago • 
766 views1 answers0 votes
What are the uses of load flow?
Answeredchetan shidling asked 6 years ago • 
786 views1 answers0 votes
Parameters we will get after load flow solution?
Answeredchetan shidling asked 6 years ago • 
768 views1 answers0 votes
Objectives of load flow?
Answeredchetan shidling asked 6 years ago • 
831 views1 answers0 votes
What is a load flow in power system?
Answeredchetan shidling asked 6 years ago • 
790 views1 answers0 votes
What is a droop characteristics?
Answeredchetan shidling asked 6 years ago • 
845 views1 answers0 votes
What are the objectives of LFC (Load Frequency Control)?
Answeredchetan shidling asked 6 years ago • 
1609 views1 answers0 votes
What is a interconnected system in power system?
Answeredchetan shidling asked 6 years ago • 
881 views1 answers0 votes
What is a Ybus
Openchetan shidling asked 6 years ago • 
799 views0 answers0 votes
what is a Ybus?
Openchetan shidling asked 6 years ago • 
828 views0 answers0 votes
Types of buses in power system?
AnsweredChetan Shidling asked 6 years ago • 
969 views1 answers0 votes
Difference between Zbus and Ybus in power system?
Openchetan shidling asked 6 years ago • 
4517 views0 answers0 votes
A lossless power system consists of three thermal plants with following fuel cost models (inRs/Hr): F1=0.01P12+40P1+1500;F2=0.0125P22+38P2+2000; F3=0.008P32+36P3+1000. Analyze the following situations and comment on the results by comparing the cost of received power and total fuel cost when supplying a total load demand of 1200 MW. (i) Optimal load dispatch assuming no generation constraints (ii) Optimal load dispatch with generation constraints 30≤P1≤550 MW; 10≤P2≤600 MW; 20≤P3≤575 MW
Openchetan shidling asked 6 years ago • 
783 views0 answers0 votes
Deduce expressions to develop the network model ZBUS using building algorithm for the addition of an uncoupled network element as a BRANCH
Openchetan shidling asked 6 years ago • 
816 views0 answers0 votes
Determine ZBUS with node 0 as reference for the network shown using building algorithm. Add the elements in the sequence 0-1, 0-2, 1-2 and 2-3. Per-unit sequence impedance values are marked on the diagram and neglect mutual coupling.
Openchetan shidling asked 6 years ago • 
886 views0 answers0 votes
Define incremental fuel cost. Deduce the coordination equation for optimal load dispatch in a lossless system with k-thermal plants and hence arrive at a generalized formula for cost of received power (λ). Also explain the step by step procedure to handle inequality constraints
Openchetan shidling asked 6 years ago • 
757 views0 answers0 votes
The fuel cost models (in Rs/Hr) of the thermal plants of system shown are: F1=0.025P12+35P1+1500 and F2=0.03P22+34P2+2000. When certain load demand is optimally dispatched, it was found that the optimal generation of plant-1 is 216.115 MW and power loss is 23.3528 MW. Determine the optimal generation of plant 2, cost of received power, total load demand, total fuel cost and penalty factors. Also analyze the effect of not coordinating the transmission loss on total fuel cost and transmission loss when optimally dispatching the same total load demand found above and comment on the results.
Openchetan shidling asked 6 years ago • 
894 views0 answers0 votes
With usual notation, derive an expression for YBUS by singular transformation. The bus admittance matrix of a 3-Bus system with ground node as reference is given below. Assuming no mutual coupling, obtain the power system network indicating the self-impedance of elements.
Openchetan shidling asked 6 years ago • 
924 views0 answers0 votes
Apply Newton Raphson Algorithm to find the root up to 2nd iteration of the following equation f(x)=x3-6×2 +9x-4=0 ,use initial estimate of x(0) =6.Approximate the solution upto 4 decimal places
Answeredchetan shidling asked 6 years ago • 
942 views1 answers0 votes
Apply Gauss Siedal Algorithm to find the root up to 2nd iteration of the following equation f(x)=x3-6×2 +9x-4=0 ,use initial estimate of x(0) =2 .Approximate the solution upto 4 decimal places
Answeredchetan shidling asked 6 years ago • 
778 views1 answers0 votes
To solve power flow problem, three phase model of power system is considered?
Answeredchetan shidling asked 6 years ago • 
789 views1 answers0 votes
For which Bus, limits on the value of reactive power are specified?
Answeredchetan shidling asked 6 years ago • 
752 views1 answers0 votes
For a power system network considered, at any Bus ' p ' , the reactive power injection is given by ________?
Answeredchetan shidling asked 6 years ago • 
745 views1 answers0 votes
The __________ Buses are most common comprising almost 85% of all buses in a given power system?
Answeredchetan shidling asked 6 years ago • 
996 views1 answers0 votes
For which BUS, magnitude and Phase angle of the bus voltages are known?
Answeredchetan shidling asked 6 years ago • 
792 views1 answers0 votes
What is power system analysis?
OpenChetan Shidling asked 6 years ago • 
923 views0 answers0 votes
12