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 6 years ago • 
876 views1 answers0 votes
MATLAB code for ABCD parameters in transmission lines?
AnsweredChetan Shidling asked 6 years ago • 
3289 views1 answers0 votes
What is swing equation in power system?
OpenChetan Shidling asked 6 years ago • 
935 views0 answers0 votes
What is Ybus and Zbus in power system?
Openchetan shidling asked 6 years ago • 
1079 views0 answers0 votes
Devices used to control the voltage?
OpenChetan Shidling asked 6 years ago • 
1148 views1 answers0 votes
Necessity of voltage control?
OpenChetan Shidling asked 6 years ago • 
1263 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 • 
951 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 • 
1066 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 • 
1049 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 • 
1061 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 • 
946 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 • 
913 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 • 
1092 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 • 
1123 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 • 
1018 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 • 
1083 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 • 
992 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 • 
1253 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 • 
1228 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 • 
998 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 • 
968 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 • 
1120 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 • 
1038 views0 answers0 votes
What is a tap changing transformer?
Answeredchetan shidling asked 6 years ago • 
1015 views1 answers0 votes
What are the properties for a good load flow solution?
Answeredchetan shidling asked 6 years ago • 
980 views1 answers0 votes
What are the uses of load flow?
Answeredchetan shidling asked 6 years ago • 
999 views1 answers0 votes
Parameters we will get after load flow solution?
Answeredchetan shidling asked 6 years ago • 
995 views1 answers0 votes
Objectives of load flow?
Answeredchetan shidling asked 6 years ago • 
1069 views1 answers0 votes
What is a load flow in power system?
Answeredchetan shidling asked 6 years ago • 
1037 views1 answers0 votes
What is a droop characteristics?
Answeredchetan shidling asked 6 years ago • 
1069 views1 answers0 votes
What are the objectives of LFC (Load Frequency Control)?
Answeredchetan shidling asked 6 years ago • 
1845 views1 answers0 votes
What is a interconnected system in power system?
Answeredchetan shidling asked 6 years ago • 
1112 views1 answers0 votes
What is a Ybus
Openchetan shidling asked 6 years ago • 
1011 views0 answers0 votes
what is a Ybus?
Openchetan shidling asked 6 years ago • 
1040 views0 answers0 votes
Types of buses in power system?
AnsweredChetan Shidling asked 6 years ago • 
1214 views1 answers0 votes
Difference between Zbus and Ybus in power system?
Openchetan shidling asked 6 years ago • 
4767 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 • 
990 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 • 
1015 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 • 
1094 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 • 
961 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 • 
1092 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 • 
1129 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 • 
1146 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 • 
996 views1 answers0 votes
To solve power flow problem, three phase model of power system is considered?
Answeredchetan shidling asked 6 years ago • 
1011 views1 answers0 votes
For which Bus, limits on the value of reactive power are specified?
Answeredchetan shidling asked 6 years ago • 
966 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 • 
953 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 • 
1247 views1 answers0 votes
For which BUS, magnitude and Phase angle of the bus voltages are known?
Answeredchetan shidling asked 6 years ago • 
1041 views1 answers0 votes
What is power system analysis?
OpenChetan Shidling asked 7 years ago • 
1099 views0 answers0 votes
12