PDF Table of Contents - UNUD

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i 2018 2^nd International Conference on Applied Electromagnetic Technology

Wahyudi Widyatmoko Parnadi, Warsa Warsa, Agus Laesanpura, Rizandi Gemal Parnadi, Hisafumi Asaue

... 8-11

Sunlight Intensity Measurement Device with Solar Tracking System

I Gede Eka Wiantara Putra, I Ketut Putu Suniantara, I Nyoman Satya Kumara

... 12-15

Effect of the Magnetic Properties on Generator Characteristic and Power Density

Pudji Irasari, Muhammad Fathul Hikmawan, Muhammad Kasim, Syaeful Alam, Puji Widiyanto, Hilman Syaeful Alam

... 16-23

Optimization of Grid Antenna 2.4 GHz using Grid Reflector and Yagi Antenna's Feed Modification Cahyo Muvianto, Pahrurrozi, Suthami Ariessaputra, Sareh Malekpour

... 24-28

A Design of Indoor RTLS by Use of the UWB-WSN based Two Reference Points

Ardiansyah Musa, Hyojeong Han, Gde Dharma Nugraha, Deokjai Choi, Seungho Seo, Juseok Kim

... 29-33

Discrete Cosine Transform and Pulse Amplitude Modulation for Visible Light Communication with Unequally Powered Multiple Access

Dwi Astharini and Dadang Gunawan

... 34-38

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ii 2018 2^nd International Conference on Applied Electromagnetic Technology

Tensile Strength and Bending Analysis in Producing Composites by Using Vacuum Resin Infusion (VARI) Method For High-Voltage Insulator Application Salman, Agus Dwi Catur, I Made Septayana, M. Dani Masterawan

... 39-43

Sensorless Optimum Power Extraction For Small Scale Stand Alone Wind Turbine Based on Fuzzy Controller Ratna Ika Putri, M Rifa'i, Ferdian Ronilaya, Lie Jasa, Ardyono Priyadi, Mauridhi Hery Purnomo

... 44-49

Induced Current Simulation of One-Dimensional Vibrating Magnetic Granular Particles System Sparisoma Viridi and Suprijadi

... 50-56

Comparison of Color Identification on Soccer Robot using Color Filtering, k-NN and Naive Bayes

Hadi Suyono, Onny Setyawati, Syaiful Amri

... 57-60

Research Opportunities of LoRaWAN for Internet of Things Implementation

Irsan Taufik Ali and Riri Fitri Sari

... 61-66

Optimization of Reactive Power and Voltage Control in Power System Using Hybrid Artificial Neural Network and Particle Swarm Optimization

Sabhan Kanata, Gibson H.M. Sianipar, Nur Ulfa Maulidevi

... 67-72

A New Modulation Technique for A Three-Cell Single- Phase CHB Inverter with Un-Equal DC-Link Voltage for Improving Output Voltage Quality

I.B.F. Citarsa, I.N.W. Satiawan, Supriono

... 73-78

A High Voltage Gain DC-DC Converter Design based on Charge Pump Circuit Configuration with a Voltage Controller

Channareth Srun, Faizal Arya Samman, Rhiza S. Sadjad

... 79-84

Earth Magnetic Fields Evolution over Nusa Tenggara Region from Declination and Inclination Changes on Lombok Geomagnetic Observatory

Teti Zubaidah, Bulkis Kanata, Paniran, Misbahuddin, Rosmaliati, Made Sutha Yadnya, Susilawati Riskia

... 85-91

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iii 2018 2^nd International Conference on Applied Electromagnetic Technology

Earth Magnetic Fields Evolution over Nusa Tenggara Region from Intensity and Spectral Density Changes on Lombok Geomagnetic Observatory

Bulkis Kanata, Teti Zubaidah, Paniran, Abdullah Zainuddin, Cipta Ramadhani

... 92-97

Symetrical Optimum of Cascaded PI-2DOF in A Precision Position Control Using A Ladder-Seconadry Double- Sided Linear Induction Motor

Mochammad Rusli, Muhammad Aziz Muslim, Ing Wardana and Mochammad Agus Choiron

... 98-105

Variable Step-Size Decremented Window-Size Scanning- based MPPT Algorithms for Thermoelectric Generator Systems

Faizal Arya Samman, Wahyu H. Piarah, Zuryati Djafar

... 106-110

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Sunlight Intensity Measurement System with Solar Tracking System

I Gede Eka Wiantara Putra Program Studi Sistem Komputer

STMIK STIKOM Bali Denpasar, Bali – Indonesia [email protected]

I Ketut Putu Suniantara Program Studi Sistem Informasi

STMIK STIKOM Bali Denpasar, Bali – Indonesia [email protected]

I Nyoman Satya Kumara Jurusan Teknik Elektro Fakultas Teknik Universitas Udayana

Denpasar, Bali – Indonesia [email protected]

Abstract—Sunlight intensities are commonly measured by an acquisition device that is placed statically. At this way, we can’t measure the sunlight intensity precisely all of the daylight. In this paper, using a solar tracking system with measurement device gives a precisely sunlight intensity from sunrise to sunset. With a low cost GY-302 module and an A6 GSM/GPRS module based on microcontroller Arduino Pro-Mini, the sunlight intensity measurement can be posted in a web server. The research also comparing the relationship between sunlight intensity and the solar panel generated voltage. As the results, beside the device can power itself independently by a solar panel, the posted data are plotted to be a sunlight intensity map. With this, a solar power plant development can be established in an appropriate area.

Keywords—sunlight intensity measurement; A6 GSM/GPRS;

solar tracking system; IoT device;

I. INTRODUCTION

Bali – Indonesia has a beautiful panorama with its mountains and beaches. Located near the equator make it a perfect tropical tourism destination. At the other side, its population growth increasing the electricity needs, but lack of green technology power plant. As described in [1], the electricity in Province of Bali was generated by fuel energy.

There are 8 power plants with 998 MW capacities, 7 of them were generated by fuel and the other one is generated by coal.

Many researches are held to develop a new power plant based on green technology like solar power. The need to develop a solar power plant is a sunlight intensity or solar radiation map as described in [2]. The map can be used as a global design for solar power plant. Specifically, based on the land surface in Province of Bali and the other islands in Indonesia needs a more precisely measurement data. With this research, we develop a sunlight intensity acquisition device with solar tracking system to build a sunlight intensity map in Province of Bali.

II. METHODS

A. Solar Tracker

Solar tracker is a device that is designed for directing solar panel surface perpendicularly to the sun. This method is used

to maximize the solar power conversion by the solar panel as described in [3]. In Bali – Indonesia, the change of the sun’s position in each year mostly around equator. In this case, the sun’s positions could be leaning to north or south. So that, the solar tracker is designed with dual axis for directing the panel to east or west and to north or south directions.

Based on the research purpose, the solar tracker is designed for directing a mini 1 Watt solar panel that is used for solar power measurement. The other 10 Watt solar panel is attached statically for recharging the batteries. For this, 2 low cost mini servo motor SG90 are used as actuators as studied in [4]. In Fig. 1, the vertical axis (v-axis) is used for directing the panels to east or west, and the horizontal axis (h-axis) is used for rotating the panels clockwise or counter-clockwise to north or south.

To controls the servo motors, four Light Dependent Resistor (LDR) sensors are included for four directions. The east and west sensors are compared to detect the higher sunlight intensity between them. And through Arduino Pro- Mini, the servo motor (v-axis) is turned for directing the panels to the higher sunlight intensity directions. As well as for the north and south sensors are compared to detect the higher sunlight intensity between them, and turns the servo motor (h-axis) clockwise or counter-clockwise.

Fig. 1. Solar tracker design.

East West

Counter-clockwise Clockwise

Mini Solar Panel

Servo Motor (v-axis) Servo Motor (h-axis) LDR Sensors

LDR Sensors Arduino

Servo Motor (v-axis) Servo Motor (h-axis) North

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B. Sensors Measurement

The sunlight intensities are measured in lux unit that is equal to one lumen per square meter. With a low cost GY-302 module, the sunlight intensities are measured through microcontroller Arduino Pro-Mini. Based on the BH1750 datasheet [5], the module could measure 1 lux to 65535 lux light intensity range. To measure the sunlight intensity that could exceeds 100000 lux, a sunlight filter sheets are added and the measurement results would be compared.

The comparison between lux and Watt is used for estimating the generated power by the solar panel in measurement area. The solar panel’s power measurement is done with a MAX471 voltage and current sensor module. As the datasheet [6], the voltage measurement is using a voltage divider method that measures up to 25 Volt. For the current measurement, a 220 Ω resistor and a LED are added as its load. With this, the solar panel’s power can be calculated by (1), and ready to be compared with lux.

Power (P) = Voltage (V) * Current (I). (1) C. HTTP Post Data

The measured data from devices are posted in a web server through GPRS network. In this research, we used a low cost A6 GSM/GPRS module that is suitable for HTTP post request through GPRS network. For this, the post request by the module must be in a right format or an error code would be gained. In our past study [7], the posted data using A6 module can be done every 10.2 s. This is a long time needs to post a data that is caused by the module response time and the delays that are involved in the Arduino IDE. Nevertheless, for this research purpose, the measured data would be good enough to be averaged every day.

Many researches are held for GPRS communication but uses a more expensive module likes SIM800 or others [8]. In this research, a simple A6 and Arduino communication is done by serial wiring as shown in Fig. 2. With this, the Arduino is set for sending an AT-command to the A6 module in a certain time to communicate with the Base Transceiver Station (BTS). After the module gives a response to the Arduino, then the next AT-command is executed. In case of no responses from the A6, a “time out” countdown would be added and the module is restarted.

Fig. 2. A6 and Arduino communication diagram.

D. Independence Power Supply

The device power source is supplied from four 18650 batteries type and they are charged by a 10 Watt solar panel.

For a long distance measurement, this method is suitable to prevent the availability of public power source and so could be moved without care about it. For this, we used a mini charger module and a voltage step up module that is shown in Fig. 3.

Fig. 3. Solar charging schema.

E. Measurement Network and Device Placement

The research purpose is to develop a sunlight intensity map in Province of Bali for 1 year. For this, we spread 57 measurement devices at any public area which are shown in Fig. 4. To measure the sunlight intensity from sunrise to sunset, the devices are placed in a wide view area (e.g., attached on the roof). As Fig. 2, each device is set to send measurement data to the web server via GPRS network.

Fig. 4 Proposed measurement nodes in Province of Bali.

F. Map Design

The sunlight intensity map is built with the measured data from each spread nodes and be plotted to a 3D chart. The measured data contains some parameters as columns in Table I. The <location’s ID> contains the list of location’s numbers and area’s names of the nodes where the devices are attached.

The <date and time> contains the list of sent data time by the attached devices, which are sets to sending the sensors data from 05:00 to 19:00 in local time. This time’s interval is sets to reduce the GPRS connection’s cost and could save the batteries power. The sunlight intensity data are listed in the intensity column. The measured solar panel’s power conversions are listed with voltage and current values. With this, the relation between them could be analyzed for the next studies. The panel direction column is needed to determine the sun positions, which are the “x” as v-axis and the “y” as h- axis.

From the parameters, the map view can be changed based on the selection of the certain time. With this, the time with averaged maximum sunlight intensity in the daylight can be determined.

Arduino

A6 Module BTS

Tx Rx

Rx Tx

Provider Internet

Web Server

Solar Panel

Voltage Regulator

Charger

Module Batteries

Step Up Module

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TABLE I. MEASURED DATA PARAMETERS

Location Time Intensity Panel Power

Panel Direction

<location’s ID>

<x,y>

III. RESULTS AND DISCUSSION

The device was tested for following the sunlight, measuring sensors data, and posting them to the web server.

A. Device Implementation

The design implementation of the sunlight intensity measurement device is shown in Fig. 5. As its design, the device specifications are shown in Table II. We use some easy to find materials such as zinc plate, PVC pipe, and other. Also we care about low cost materials without decreasing measurement effectiveness.

Fig. 5. Sunlight intensity measurement device with solar tracking system.

TABLE II. DEVICE SPECIFICATIONS

Parameter Value Unit

Lux (Max) 12734 Lux

Solar Tracker Panel’s Power (Max) 1 Watt

Panel’s Tilt (East) 5 degree

Panel’s Tilt (West) 50 degree

Battery Power (Max) 11.2 Ampere

Solar Panel’s Power (Max) 10 Watt

Device Power Consume 1 Watt

As Fig. 5, the device is designed with a 1 watt mini solar panel which is following the sun position. And the 10 watt

solar panel is placed statically which is used as battery charger power source.

B. Device Testing

The solar tracker’s are tested in finding the sun’s position and directing the solar panels perpendicularly, also to following the sun positions until sunset. Based on the Table II, the solar tracker’s ability for directing the solar panels to the east or west are limited by its mechanical design. With this test, depending on the device attachment for a wider view area, the mechanical design for rotating the panel have to be improved.

C. Power Supply

The typical problem for a long distance measurement is an independence power supply. This device is powered by four 18650 rechargeable batteries, they are 3.7 Volt and 2800 mAh each. As the total device power consume, then it can be operated up to 11 hours. This value is not enough for a long time measuring, for this, the only one energy source is the solar energy. With this, as we estimate that the available solar energy for 4 hours per day, then we have 40 Watt that enough to charge the batteries.

D. Map Implementation

The sunlight intensity map in Province of Bali is our research purpose. We use a desktop base application as a map builder using 3D chart based on Pascal programming language. On Fig. 6, the application interface is designed to show the sensors values in some color levels.

Fig. 6. Map Interface Design

As Fig. 6, the map is plotted with dummy data and smoothed with moving average method.

E. Data Analysis

The relationship between the light intensity and the panel’s voltage are analyzed. As Fig. 7, the more light intensity makes more solar panel’s voltage.

IV. FUTURE WORKS

The proposed measurement device is ready to be implemented which is measures the sunlight intensity, solar panel’s power, and sun positions. Our works is continued to

Node

plotted data in a day

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spreads the devices to the proposed nodes and starts data collection. After the map is finished, our future works is to spreads the devices to the next area such as Lombok Island and Nusa Tenggara.

Fig. 7. Light Intensity and Panel’s Voltage.

ACKNOWLEDGMENT

This research is fully supported by Kementerian Riset, Teknologi, dan Pendidikan Tinggi through Insentif Riset Sistem Inovasi Nasional (INSINAS) Gelombang II, 2017. No:

25/INS2/PPK/E/E4/2017.

REFERENCES

[1] PLN, P. “Rencana Usaha Penyediaan Tenaga Listrik (RUPTL), 2016 – 2025,” Kementerian Energi dan Sumber Daya Mineral, 2016. Lamp. B.7 pp.380-386.

[2] Nurliyanti, V., Pandin, M., Pranoto, B. “Pembuatan Peta Potensi Energi Surya.” Mineral dan Energi, 2012. Vol. 10, No. 4, 47-54

[3] Dhanabal, R., Bharathi, V., Ranjitha, R., Ponni, A., Deepthi, S., Mageshkannan, P. “Comparison of Efficiencies of Solar Tracker Systems with Static Panel Single-Axis Tracking System and Dual-Axis Tracking System with Fixed Mount.” International Journal of Engineering and Technology (IJET), 2013. Vol 5 No 2 Apr-May 2013 [4] Wiantara, E, “Aplikasi Pengikut Matahari Dua Poros sebagai Media

Akuisisi Data Intensitas Cahaya,” unpblished.

[5] ROHM Semiconductor, “Digital 16 Bit Serial Output Type Ambient Light Sensor IC,” Technical Note, 2011.11 – Rev.D.

[6] Maxim, “Precision, High-Side Current-Sense Amplifier,” datasheet, 1996. 19-0335; Rev 2; 12/96.

[7] Wiantara, I.G.E., Suniantara, I.K.P., Kumara, I.N.S. “Implementasi dan Analisis Perangkat Pengirim Data Sensor melalui Modul A6 GSM/GPRS berbasis Microcontroller,” Prosiding Seminar Nasional Pendidikan Teknik Informatika (Senapati) 2017. pp.109-114.

[8] Zaghloul, Mohamed Saad. “GSM-GPRS Arduino Shield (GS-001) with SIM900 chip module in wireless data transmission system for data acquisition and control of power induction furnace.” International Journal of Scientific & Engineering Research 5, no. 4 (2014): 776.

Sample in a day

Lux

Sample in a day

Panel’s Voltage