Simulations

Anil maurya
Electrical & Electronics Engineer 1
BY
ANIL MAURYA
ELECTRICAL & ELECTRONICS
ENGINEER

Anil maurya
CONTENT
SIMULATION NO.-1 TO SIMULATE FULL BRIDGE RECTIFIER
SIMULATION NO.-2 TO SIMULATE MODEL FOR GENERATION
OF SIN AND COSINE WAVE
SIMULATION NO.-3 TO SIMULATE DC-AC INVERTER
SIMULATION NO.-4 SIMULATION OF A THREE PHASE HALF
CONVERTER WITH R LOAD
SIMULATION NO.-5 SIMULATION OF A CIRCUIT BREAKER
USING A SIMPLE CIRCUIT
SIMULATION NO.-6 SIMULATION OF A CIRCUIT WITH R, RL,
RC AND RLC LOAD AND STUDY THE
VARIOUS PARAMETERS LIKE POWER
FACTOR,VOLTAGE AND CURRENT AS
WELL AS COMPARE THE RESULTS.
SIMULATION NO.-7 SIMULATION OF A THREE PHASE AC
VOLTAGE CONTROLLER WITH R LOAD
SIMULATION NO.-8 OBTAIN THE STEP RESPONSE OF
FOLLOWING MODEL
SIMULATION NO.-9 TO SIMULATE SINGLE PHASE HALF
WAVE CONVERTER
SIMULATION NO.-10 SIMULATION OF A SINGLE PHASE DUAL
CONVERTER WITH R LOAD AND OBTAIN
FIRST AND THIRD QUADTRANT
OPERATION
SIMULATION NO.-11 SIMULATION OF A SINGLE PHASE AC
VOLTAGE CONTROLLER WITH R LOAD

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Simulation no.-1
Object-
To simulate full bridge rectifier.
Circuit Diagram:-
Model for Full bridge Rectifier

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Waveform for full bridge rectifier
Result:-
We have simulated single phase full bridge rectifier and observed
waveform across scope.

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Simulation no.-2
Object- To simulate model for generation of sin and cosine wave.
Block Required:-
1. Constant
2. Product
3. Sin Trigonometric function
4. Cos Trigonometric function
5. MUX
6. Scope
Theory:-
We have given constant 2*pi and frequency 50Hz and clock to a product
which gives output Wt =2*pi*ft.
This Wt is given to trigonometric function sin and cos. The output of both
these is applied to a product and on the other terminal constant of magnitude of
5. The output of both this product is multiplexed and given to scope and finally
we got sine and cosine wave.

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Model for Generation of sine and cosine wave

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Waveform for sine and cosine
Result:-
We have simulated model for sine and cosine wave and observed

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Simulation no.- 3
Object- To simulate DC-AC inverter.
Block Required:-
1. AC voltage source
2. IGBT
3. Pulse Generator
4. Goto
5. From
6. Current Measurement
7. Voltage Measurement
8. Mux
9. Powergui
10.Scope
11.Series RLC branch
Theory:-
A single phase full bridge inverter is shown with four gate controlled
IGBT. The DC voltage is controlled and converted into AC voltage.
For the time t/2 IGBT T1 and T2 are turned on and load current flow from x
to y. For the next t/2 IGBT T3 and T4 are turned ON and current flow from y to x
i.e. in opposite direction from previous case.
In this way load experience the alternating current by changing the gate
supply of IGBT and we get an alternating voltage and current at load terminal.

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Model for DC-AC inverter

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Waveform for DC to AC Inverter
Result:-
We have simulated single phase full bridge inverter and observed

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Simulation no.- 4
Object- Simulation of a three phase half converter with R load.
Block Required:-
1. 3 phase AC voltage source
2. ThyristorPulse Generator
5. powergui
6. Scope
7. Series RLC branch
Model for 3 phase half wave converter

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Waveform for 3 phase half wave converter
Result:-
We have simulated 3 phase half wave converter and observed waveform
across scope.

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Simulation no. -5
Object-
Simulation of a circuit breaker using a simple circuit.
Block Required:-
2. Circuit Breaker
3. Timer
7. Scope
8. Powergui
Theory-
Circuit breaker is a device that interrupts a circuit during fault condition and
also makes circuit after fault clearing. It can be operated both manually as well as
automatically.
In this simulation a circuit breaker is simulated using transmission line
parameters like an inductor in series, parallel RLC branch etc. Voltage and current
is measured for circuit breaker using measurement blocks and displayed on two
different scopes.
A timer is also used for opening and closing of circuit breaker. In this timer
different time instants are given at which ckt breaker is getting close and open. A
powergui block is used for continuous power flow from AC voltage source.
In this simulation initially circuit breaker is closed. Opening time of circuit
breaker is given 0.2 sec. and closing time is given 0.5 sec. using timer control. It is

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cleared from voltage and current waveforms that initially when circuit breaker is
closed voltage across it is zero and load current is flowing through it. At 0.2 sec.
where a fault is occurred and circuit breaker gets opened and current through it is
zero and voltage is appeared. This process is continued till 0.5 sec. let at 0.5 sec.
fault is cleared and circuit breaker is closed and again voltage is zero but current
initially goes to a peak value and then starts decay to come in its starting value.
Model for Operation of Circuit Breaker

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Current waveform of circuit breaker

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Voltage waveform of circuit breaker
Result:-
We have simulated circuit breaker using a simple circuit and
observed waveform across scope.

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Simulation no.- 6
Object- i) Simulation of a circuit with R, RL, RC and RLC load and study the
various parameters like power factor, voltage and current as well as compare the
results.
ii) Show the waveform at the time of resonance.
Block Required:-
2. Goto
3. From
6. Powergui
8. Scope
Circuit Diagram with R load

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Waveform of load voltage and load current with R load
Circuit Diagram with RL load

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Waveform of load voltage and current for RL load
Circuit Diagram with RC load

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Waveform of load voltage and current for RC load
Circuit Diagram with RLC load

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Waveform of Simple circuit with RLC load when inductive reactance is
dominating
Waveform of Simple circuit with RLC load when capacitive reactance is
dominating

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Result:-
We have simulated a circuit with R, RL, RC and RLC and observed
waveform of load voltage and current.

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Simulation no. - 7
Object- Simulation of a three phase ac voltage controller with R load.
Block Required:-
10.Thyristor
11.Pulse Generator
12.Current Measurement
13.Voltage Measurement
14.powergui
15.Scope
16.Series RLC load
Model for three phase AC voltage controller

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Waveform for three phase AC voltage controller
Result:-
We have simulated single phase AC voltage controller and observed

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Simulation no- 8
Object:-
Obtain the step response of following model.
Transfer function of plant 1 = 1/ (S+1)
Transfer function of plant 2 = 1/ (S+2)
Block Required:-
1. Step input
2. Plant 1 for 1/s+1
3. Plant 2 of 3/s+2
4. Error Detector
5. Scope
Model for transfer plant 1 & 2.

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Waveform for step response for given model
Result:-
We have simulated step response of transfer function and observed

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Simulation no.- 9
Object:- To simulate single phase half wave converter
Block Required:-
2. Thyristor
3. Pulse Generator
4. Goto
5. From
8. Mux
9. Powergui
10.Scope
Theory:-
A simple rectifier circuit consisting of a single thyristor feeding DC
power to a resistive load R is shown. When voltage i.e. AC is supplied to circuit the
thyristor is forward biased and at delay angle at Vc gate signal is applied between
gate and cathode and thyristor is turns ON during positive half cycle. When
negative cycle appears the thyristor is reverse biased and load is reverse biased
and load is not connected to the source. So for positive half cycle the load doesn’t
experience any voltage.

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Model for single phase half wave converter

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Waveform for single phase half wave converter
Result:-
We have simulated single phase half wave converter and observed

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Simulation no.- 10
Object- Simulation of a single phase dual converter with R load and obtain first
and third quadtrant operation.
Block Required:-
2. Thyristor
3. Pulse Generator
6. powergui
7. Scope
9. X-Y Graph
Model for Single phase Dual converter

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Graph for Single phase dual converter –First quadtrant operation
Graph for Single phase dual converter- Third quadtrant operation

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Waveform for Single phase dual converter
Result:-
We have simulated Single phase dual converter and observed graph &

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Simulation no.- 11
Object- Simulation of a single phase ac voltage controller with R load.
Block Required:-
2. Thyristor
3. Pulse Generator
6. powergui
7. Scope
Model for Single phase AC voltage controller

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Waveform for Single phase AC voltage controller
Result:-
We have simulated single phase AC voltage controller and observed

Simulations

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