POWER SYSTEM I ECB 3153

EXPERIMENT TITLE

________________________________

Name

:

Student ID

:

Group No :

Lab Session :

Date

:

Lecturer :

GAs : : :

Rubric for Pre-Lab & In-Lab

Course : Power Systems Date:

Student

Name:

Student

ID:

Topic (Weight)

Unacceptable (0)

Marginal (1)

Acceptable (2)

Exceptional (3)

Points

Analysis and Preparation before

experiment (2)

q Demonstrated little or no ability to conduct experiments. Did not collect meaningful information.

q Demonstrated some ability to conduct experiments. Collected some meaningful information.

q Demonstrated adequate ability to conduct experiments. Collected most of the needed information.

q Demonstrated superior ability to conduct experiments. Collected all the appropriate information.

Knowledge & Understanding

(3)

q No understanding of the topic and accurate answer to questions posed by instructor.

q Little understanding of the topic and accurate answer to questions posed by instructor.

q Adequate understanding of the topic and accurate answer to questions posed by instructor.

q Excellent understanding of the topic and accurate answer to questions posed by instructor.

Safety & Health Issues

(1)

q No understanding or appreciation of safety and health related issues

q Serious deficiencies in addressing health and safety issues leading to a unsupported and/or infeasible result

q Sound understanding of health and safety issues. Mostly effective in achieving supported results

q Complete understanding of health and safety issues leading to sound and supported results

Participation in Teamwork (If applicable)

(3)

q Demonstrated

little or no ability to function effectively as leader/team member during experimental work

q Demonstrated

some ability to function effectively as leader/team member during experimental work

q Demonstrated

adequate ability to function effectively as leader/team member during experimental work

q Demonstrated

superior ability to function effectively as leader/team member during experimental work

Punctuality

(1)

q >10 minutes late

q 6-10 minutes late

q 1-5 minutes late

q Punctual

TOTAL

Examiner:

Rubric for Lab Report

Course : Power Systems Date:

Student: Student

ID:

Topic (Weight)

Unacceptable (0)

Marginal (1)

Acceptable (2)

Exceptional (3)

Points

Introduction Background Objective

Scope

(2)

q Unable to state the introduction

clearly

q State the introduction with

limited information

q Able to state the introduction with

minor error

q Able to state the introduction

clearly

Theoretical Knowledge/ Literature Review

(3)

q Not explained or not related to the project

q Not clearly explained or partially related to the project

q Important knowledge are covered but still missing some important concept

q Clearly explained the knowledge and concept. Student capable of discussing the theory and simulated results

Results/Findings/Analysis

(3)

q No results or

plagiarized work are presented

q Minimum results

are presented and analyzed

q Results are

presented but with minor error and could still be improved

q Results and

analysis are clearly explained using relevant tool such as graph , table, etc.

Report Organization

(2)

q Report is too difficult to

understand with many grammatical error and not

well organized

q Report is easy to understand with

few grammatical error and moderately organized

q Report well written but

occasionally some points are difficult to understand.

Minor grammatical error

q Report very well written and easy

to understand

TOTAL

Examiner:

!!

" #!

$ %

PRE-LAB (2.5%)

(1) What is a shunt compensation and why used in the transmission line? (2) How does shunt compensation work on the lines? (3) A shunt compensation as represented in single circuit below, determine what is

the exactly capacitor size for each phase and what is the effect of reactive inductance in T.L.

(4) There are two types of compensation connections, series and shunt connections. Compare between them in terms of current, voltages, system loss, and real power.

(5) Design a table for experiment data to show the characteristics of the voltage and reactive load.

EQUIPMENT MANUAL (2.5%)

In order to do the experiment you have to follow these instructions and procedures; 1. At (C1), put the speed control and voltage control potentiometer COARSE in

minimum. 2. Put the speed control and voltage control potentiometer FINE on 50 percent 3. Put the switch for START/RUN in position start (only this is possible for starting

the machine). 4. Put the switch for the DC converter CBM1 in ON position. The machines will now

speed up to basic speed. During the acceleration a warning bell will sound and the ammeter IA will jump up to several amp (for a couple of seconds).

5. Adjust the speed control potentiometer COARSE and FINE to a position that will give a speed close to 1500 rpm.

6. Put the CB for the DC converter CBF1 in ON position. Then witch on isolator I1 or I2.

7. Switch on circuit breaker CB1. The power is transmitted either through line A230 orB230 depending on which isolator is switched on.

8. At (C3), adjust the voltage potentiometer COARSE and FINE until the outgoing lines have approximately 240 V at no load as indicated in the meter.

9. At cubicle C3, switch on I5 or I6. Then switch on I9 and then CB3 10. Voltage, current and power readings can also be observed in the digital meter

connected. 11. At (C12), take down the readings (meter) of voltage and reactive power at no

load. 12. Increase the variable inductive load without compensation. i.e move the switch

of the inductive load to position 1 to 6, and record the readings of voltage, load current, and reactive power.

13. Now move the variable capacitive switch to position 1. Shunt compensation is applied to the circuit. Repeat step 14 for different values of compensation applies the load and record the reading at each case.

SYSTEM COMPONENTS:

OBSERVATIONS

For different values of compensation apply the load and record the readings.

Receiving End

Volts (V) Amp (I) Real Power (W)

Load (Var)

Serial No.

Receiving End Compensation In load Load current

Volts (V) Reactive Power (Q)

(Var) (Var) (A)

0

1

2

3

4

5

6

Serial No.

Receiving End Compensation In load Load current

Volts (V) Reactive Power (Var)

(Var) (Var) (A)

0 1 2 3 4 5 6

Fill table (4), by connecting 3 phase induction motor as in Pre-Lab as star connection to the shunt compensation terminals, and try to increase the compensation of position 1 to position 4,

Serial No.

Receiving End Compensation In load Load current

Volts (V)

Reactive Power (Var)

(Var) (Var) (A)

0 1 2 3 4

LAB (5%) OBJECTIVE

To study the effect of mid-point shunt compensation on power transfer capability in a transmission line.

CIRCUIT DIAGRAM

On long transmission lines heavy loads produce a large dip in voltage. Shunt capacitors are used to improve voltage, increase power transfer and improve the system stability. Capacitors are connected either directly to a bus bar or to the tertiary winding of a main transformer and are disposed along the route to minimize the losses and voltage drops. Shunt capacitors are used for lagging power factor circuits created by heavy loads. The effect is to supply the requisite reactive power to maintain the receiving end voltage at a satisfactory level.

TASK

1. Perform experiment to show that power transfer to the load increases as increasing shunt compensation. Show your results at any a table as represented in plotted graphs.

2. What is the relationship between the load current and the reactive load? 3. Draw a schematic diagram of shunt compensation experiment.