Abstract-On one hand, the particular objective of this research is to yield the software program in order to control efficiently the important aspects in electric power systems which can be implemented in industries. In the other hand, the longterm objective is to extend the curriculum, syllabi, laboratory facilities, and to improve the abilities and qualities of graduates continuously either within State Polytechnic of Ujung Pandang or outside. Method used to achieve these objectives is making, design and implementation which will be last for two years. Simulator for generation system in the first stage of the research is balanced six-phase system yielded from the circuit of 3-one phase centre-tap transformers of 220/18 V, 15 A, as the supply of low-tension 3-phase system, which feeds six one-phase transformer of 18/220 V, 20 A, whose output as another balanced 3-phase system with 220 V/phase. From balanced 6-phase system, a balanced 3-phase will simulate generator number 1 and another balanced 3-phase will simulate that of number 2. Interface which is based on Delphi program is to switch all transmission lines. The result of experiment shows that voltages in the two generator busbars experience the significant drop voltage if they work separately, that are 20.5% -36.4% and 20.5% -63.6% for generator number 1 and number 2 respectively, for one to three load busbars operated sequentially, which also reveals that greatest voltage drop occurs in the generator busbar with most lines supplied. Simulating the two generators working simultaneously, then voltage drops are more significant, that are 65.9% -72.7% and 65.9% -79.5% for generator number 1 and number 2 respectively, for one to three load busbars operated sequentially, which also proves that transformer bank as generator simulator needs to increase its current capacity.

The development of Microcontroller-Based Water Level and Temperature Control is the development of Microcontroller-Based Water Level Control Design. This equipment is a tool that can be used to monitor and control the level and temperature of water. The aim of this research is to make a water level and temperature control device based on microcontroller, and to display the information of water level and temperature on the computer. The research methods used during the implementation process of this research are : literature study, hardware and software design, and data retrieval. The Microcontroller-based Water Level and Temperature Control uses two sensors, namely : ultrasonic sensor to detect water level, then the second sensor is a thermocouple sensor which is used to detect water temperature. This equipment uses a water pump to flow water from one tank to another, and the heater that used to heat water. The device has 2 buttons, where the first button is used to control the water level, and the second button is used to control the level and temperature of the water. Based on the results of the study it can be concluded that this water level and temperature control system works well as expected, where this equipment uses a multi position control system mode that has been programmed in the Arduino software and can display sensor readings in the form graphs using matlab software.

A yard cleaning robot was made to be able to clean the yard by sucking leaves and trash particles that are 125 mm x 41 mm in size and weighing 50 grams. This robot can run straight on a flat surface. In this research, the page cleaning robot uses a microcontroller ATMega 328 (Arduino Uno) as a controller and a vacuum cleaner to suck the trash in the form of leaves. The program used in this robot uses the Arduino programming with the following working system: when the robot circuit is activated the dc motor will rotate moving the robot to run straight while using a compass sensor to detect angles and the navigator for movement of motor direction. When the robot is walking the garbage is swept and sucked by the vacuum cleaner. When there is a barrier at a distance of 50 cm in front of the robot, the robot will automatically rotate 180º using an ultrasonic sensor mounted in front of the robot that gives information to the controller.

Penelitian ini bertujuan untuk mengetahui seberapa besar persentaseketidakseimbangan beban pada transformator dan juga untuk mengetahui seberapabesar efisiensi dan rugi daya transformator pada saat diberi beban seimbang maupuntidak seimbang. Karena data yang terukur merupakan beban tidak seimbang makauntuk menghitung beban pada saat keadaan seimbang digunakan harga rata-rata daridata tersebut. Dengan menentukan faktor ketidakseimbangan lewat metode komponensimetris dan metode koefisien tak seimbang, maka didapatkan rugi tembaga, dayaoutput dan efisiensi dalam keadaan tidak seimbang. Hasil penelitian ini menunjukkanbahwa pada saat transformator diberi beban tidak seimbang maka efisiensinya akanmenurun dibandingkan dengan saat transformator diberi beban yang seimbang. Akantetapi ketidakseimbangan beban tidak terlalu berpengaruh terhadap efisiensi karenamemberikan perubahan efisiensi yang tidak terlalu signifikan yakni rata-rata sebesar3,47 % saja.

Penelitian ini bertujuan untuk menghasilkan model matematika motor DC dan program simulasinya. Respon transien motor dc sangat cepat sehingga sulit diamati dengan pengukuran secara langsung. Untuk itu diperlukan suatu simulasi untuk mengamatinya, sehingga dibutuhkan pemodelan dari motor dc tersebut. Berhubung banyak motor yang tidak dilengkapi dengan data parameter yang diperlukan dalam simulasi, maka dibutuhkan suatu pengujian untuk mendapatkan parameter-parameter motor dc tersebut. Dalam penelitian ini digunakan motor DC eksitasi terpisah pada kondisi arus eksitasi yang konstan. Parameter yang akan dicari adalah tahanan kumparan jangkar, Ra, induktansi kumparan jangkar, La, konstanta torsi motor, Km, momen inersia, J, dan koefisien gesekan liat, B. Ra dan La ditentukan dari pengujian statis, Km dan B ditentukan dari pengujian dinamis, dan J diperoleh dari data sheet motor DC. Hasil yang diperoleh Ra = 3,028 [Ω], La = 0,028 [H], J = 0,0094 [kg-m2], B = 0,0058 [Nm/s] dan Km = 0,955 [Nm/A] pada arus eksitasi 0,3 A. Pada kondisi nominal B = 0,0007 [Nm/s] dan Km = 1,137 [Nm/A]. Dari hasil simulasi pada kondisi berbeban dengan variasi torsi beban diperoleh perbedaan kecepatan putaran motor DC hasil pengukuran dan hasil simulasi rata-rata 1,449%. Dengan simulasi model motor DC, kondisi transient, seperti arus start yang besar dan cepat dapat diamati.