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<![CDATA[PERANCANGAN ZETA CONVERTER PADA PELACAKAN TITIK DAYA MAKSIMUM PHOTOVOLTAIC MENGGUNAKAN ALGORITMA MODIFIKASI HILL CLIMBING ]]>
<![CDATA[Irwan Mahmudi]]>;
<![CDATA[Jumiyatun Jumiyatun]]>;
<![CDATA[Baso Mukhlis]]>;
<![CDATA[Lukman Lukman]]>
<![CDATA[ Foristek Vol. 11 No. 1 (2021): Foristek ]]>
Publisher : <![CDATA[Foristek ]]>
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DOI: 10.54757/fs.v11i1.36
<![CDATA[Electrical energy is a primary need at this time, which almost all human activities require electricity. The electrical energy we use today is a conversion from other energy, partly derived from fossil energy, which is energy that cannot be renewed and will run out if it is continuously explored and exploited. Solar energy is a renewable energy source that has the potential to be converted to electrical energy using solar panels or so-called photovoltaics. Photovoltaic has a drawback in its use, namely the output value is very dependent on environmental conditions. To maximize the power efficiency between the photovoltaic output and the power to be used by the load, a method is needed, namely Maximum Power Point Tracking (MPPT). In the application of this MPPT DC-DC Zeta converter is used with a hill climbing algorithm to achieve the value of the output voltage and current at maximum power. With this method, it is expected that MPPT control is reliable and easy to apply. In this study, the type of photovoltaic module used is the 60 Wp monocrystalline type with sampling data once an hour from 09.00 - 17.00 WITA, the tracking speed data obtained by the modified hill climbing algorithm is 0.142 seconds on average with an average efficiency of 99.969 %.]]>
<![CDATA[IMPLEMENTASI PENGONTROLAN TEGANGAN KELUARAN DC STEP UP QUADRATIC BOOST CONVERTER DENGAN VARIASI TEGANGAN INPUT DARI SINGLE PV MENGGUNAKAN LOGIKA FUZZY ]]>
<![CDATA[Irwan Mahmudi]]>;
<![CDATA[Jumiyatun Jumiyatun]]>;
<![CDATA[Kadri Kadri]]>
<![CDATA[ Foristek Vol. 10 No. 2 (2020): Foristek ]]>
Publisher : <![CDATA[Foristek ]]>
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DOI: 10.54757/fs.v10i2.38
<![CDATA[Resulting output voltage is not constant due to light intensity and surface temperature of the solar panels. To overcome the output voltage of solar panels that tends to fluctuate, is to add a DC-DC converter to the output side of the DC-DC Converter used in this study is the Quadratic Boost Converter type which has a role to increase the output voltage of the monocrystalline type solar panel so that it remains constant at 24V DC. using Mamdani Fuzzy Logic Control as a method of controlling PWM switching. The results obtained from this study are that the quadratic boost converter can keep the output voltage of the solar panel constant at 24V, with low ripple voltage and overshoot. The Mamdani fuzzy logic method used can produce a constant output voltage value with a rise time of ± 5 seconds. The efficiency obtained from this converter hardware is quite good, ranging from 76% - 88%.]]>
<![CDATA[KONSERVASI ENERGI LISTRIK PADA BANGUNAN GEDUNG KANTOR BUPATI TOJO UNA-UNA ]]>
<![CDATA[Jordan A. Tiro]]>;
<![CDATA[Baso Mukhlis]]>;
<![CDATA[Agustinus Kali]]>;
<![CDATA[Irwan Mahmudi]]>
<![CDATA[ Foristek Vol. 11 No. 2 (2021): Foristek ]]>
Publisher : <![CDATA[Foristek ]]>
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DOI: 10.54757/fs.v11i2.110
<![CDATA[Electrical energy has a very important role in the economic, industrial and social development of the community, this causes an increase in the demand for electrical energy in line with the increase in people's welfare, economic and industrial growth. On the other side, energy sources that are commonly used for power generation are increasingly expensive and limited in availability and cause environmental pollution. Based on these considerations, it is necessary to implement an energy management program to preserve energy resources and use energy effectively. Energy consumption intensity (ECI) is a term used to determine the amount of electrical energy consumption in a room. The calculation of the intensity of energy consumption carried out at the Tojo Una-una regent's office in Central Sulawesi consists of 3 buildings with 129 rooms, it was found that 7 rooms were categorized as quite efficient and wasteful.]]>
<![CDATA[SAFETY AND SECURITY STUDIES OF RAILWAY LINES WITH PUBLIC ROADS (CASE STUDY OF RAILROAD CROSSING IN THE KENJERAN ROAD OF SURABAYA CITY) ]]>
<![CDATA[Irwan Mahmudi]]>;
<![CDATA[Sri Wiwoho Mudjanarko]]>
<![CDATA[ IJEEIT : International Journal of Electrical Engineering and Information Technology Vol 2 No 2 (2019): September 2019 ]]>
Publisher : <![CDATA[NAROTAMA UNIVERSITY ]]>
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DOI: 10.29138/ijeeit.v2i2.1154
<![CDATA[Railways are a mode of transportation that is being liked by the public because of its efficiency. The train has its own road in the form of rails, it doesn’t mean the train doesn’t intersect other transportation. The train crossing is a conflict area for public road users with train. This includes train crossing at Kenjeran street. The kenjeran street itself is a national road that is quite strategic because it is one of the accesses to the Surabaya-Madura toll road. The research this time aims to find out the security aspects that must be improved at the train crossing kenjeran street. Including rider behaviour at the time of the train crossing. The method used for this research is direct observation of the field and also shares questionnaires to find out if a public road user understands regulations while on a train crossing. The research results of many signs or road markers are incomplete so that many road users do not know that in front of the train crossing. Other public road user behaviour is also a lot of offense.]]>
<![CDATA[Perbaikan Tegangan Pada Jaringan Distribusi 20 Kv Melalui Penempatan Pembangkit Tersebar Berbasis Particle Swarm Optimization ]]>
<![CDATA[Yuli Asmi Rahman]]>;
<![CDATA[Sitti Nuradha Wati S]]>;
<![CDATA[Ratih Mar’atus Shalihah]]>;
<![CDATA[Irwan Mahmudi]]>
<![CDATA[ Jurnal JE-UNISLA : Electronic Control, Telecomunication, Computer Information and Power System Vol 7, No 1 (2022) ]]>
Publisher : <![CDATA[Universitas Islam Lamongan ]]>
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DOI: 10.30736/je-unisla.v7i1.815
<![CDATA[Voltage losses are problems that often occur in distribution systems, resulting in voltage drops to reduce the electrical power supplied to consumers. The allowable stress drop in the distribution is +5% and -10%. One way to overcome this is to place scattered power plants into account the given location and capacity (MW and MVar). In this study, optimization of generator placement using an effective method is Particle Swarm Optimization (PSO). PSO is an algorithm that implements problem understanding. The sequence of news generators is carried out by directing the selection of Gbest, which has a minimum voltage drop value by increasing the number of particles. Initial simulation using a power flow study run via Matlab and ETAP. The objective function of this optimization process is drop voltage minimization with contraint function is the power loss of each bus. The final simulation found the best generator locations on buses 7, 10, and 13. After optimization, the voltage increase was obtained by 4.05%, 9.05%, and 10.15% on each bus.]]>
<![CDATA[PENGARUH MODIFIKASI PADA ALGORITMA HILL CLIMBING UNTUK PELACAKAN TITIK DAYA MAKSIMUM PHOTOVOLTAIC MENGGUNAKAN SEPIC CONVERTER ]]>
<![CDATA[Ratih Mar'atus Sholihah]]>;
<![CDATA[Irwan Mahmudi]]>;
<![CDATA[Yuli Asmi Rahman]]>;
<![CDATA[Sundun Sada Maripi]]>
<![CDATA[ Jurnal JE-UNISLA : Electronic Control, Telecomunication, Computer Information and Power System Vol 8, No 1 (2023) ]]>
Publisher : <![CDATA[Universitas Islam Lamongan ]]>
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DOI: 10.30736/je-unisla.v8i1.1043
<![CDATA[Renewable energy is an alternative energy to reduce the use of fossil energy, one of the renewable energy used today is photovoltaic. photovoltaic converts solar energy into electrical energy. The efficiency of photovoltaic is very low, so a method is needed to get the maximum power. The method for getting maximum power from photovoltaic is called Maximum Power Point Tracking (MPPT). MPPT is a method to track the power point of an energy source to produce maximum power. There are various methods and ways to realize MPPT control, one of which is the Modified Hill Climbing Algorithm (MHC) . The algorithm determines the duty cycle setting on the SEPIC Converter. It is intended that the converter work at maximum power. In testing using measurement and calculation data, the average tracking efficiency value = 99.99486%, the average tracking speed value = 0.189978s and the average tracking power value = 50.56408 Watt. Modified Hill Climbing Method provides better tracking power and efficiency when compared to simple Hill Climbing, but makes the Steady state response time 0.1s longer.]]>
<![CDATA[Artificial Intelligent for Human Emotion Detection with the Mel-Frequency Cepstral Coefficient (MFCC) ]]>
<![CDATA[Anita Ahmad Kasim]]>;
<![CDATA[Muhammad Bakri]]>;
<![CDATA[Irwan Mahmudi]]>;
<![CDATA[Rahmawati Rahmawati]]>;
<![CDATA[Zulnabil Zulnabil]]>
<![CDATA[ JUITA: Jurnal Informatika JUITA Vol. 11 No. 1, May 2023 ]]>
Publisher : <![CDATA[Department of Informatics Engineering, Universitas Muhammadiyah Purwokerto ]]>
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DOI: 10.30595/juita.v11i1.15435
<![CDATA[Emotions are an important aspect of human communication. Expression of human emotions can be identified through sound. The development of voice detection or speech recognition is a technology that has developed rapidly to help improve human-machine interaction. This study aims to classify emotions through the detection of human voices. One of the most frequently used methods for sound detection is the Mel-Frequency Cepstrum Coefficient (MFCC) where sound waves are converted into several types of representation. Mel-frequency cepstral coefficients (MFCCs) are the coefficients that collectively represent the short-term power spectrum of a sound, based on a linear cosine transform of a log power spectrum on a nonlinear mel scale of frequency. The primary data used in this research is the data recorded by the author. The secondary data used is data from the "Berlin Database of Emotional Speech" in the amount of 500 voice recording data. The use of MFCC can extract implied information from the human voice, especially to recognize the feelings experienced by humans when pronouncing the sound. In this study, the highest accuracy was obtained when training with epochs of 10000 times, which was 85% accuracy.]]>
<![CDATA[Aplikasi Kontrol Logika Fuzzy Untuk Penstabil Tegangan pada Rangkaian Pv- Cuk Konverter dengan Load Shedding ]]>
<![CDATA[Irwan Mahmudi]]>;
<![CDATA[Andi Fatmawati]]>;
<![CDATA[Lutfiyana A. Anshar]]>;
<![CDATA[Arwan Arwan]]>
<![CDATA[ Syntax Literate Jurnal Ilmiah Indonesia ]]>
Publisher : <![CDATA[Syntax Corporation ]]>
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DOI: 10.36418/syntax-literate.v7i2.6393
<![CDATA[Kebutuhan energi listrik sangat penting bagi kehidupan manusia khususnya kota Palu. Melalui sel surya, energi matahari dapat diubah langsung menjadi energi listrik. Masalah dengan panel surya adalah output tegangan yang tidak stabil. Oleh karena itu, diperlukan suatu penelitian agar tegangan keluaran panel surya stabil. Dalam penelitian ini, konverter Cuk digunakan untuk menjaga agar tegangan keluaran PV (Photo Voltage) konstan dalam 24 volt. Sistem close loop konverter Cuk dikendalikan oleh logika fuzzy. Hasil dari penelitian ini adalah konverter Cuk mampu menaikkan tegangan keluaran hingga 24 Volt dengan tegangan masukan sekitar 17 hingga 23 Volt. Dan, dengan kontroler logika fuzzy, sistem close loop konverter Cuk dapat menjaga konstanta keluaran PV sekitar 24 Volt. Kontroler logika fuzzy dapat mencapai kondisi mapan atau stabil dalam waktu 2 detik. Meskipun demikian, input dan beban PV berfluktuasi.]]>
<![CDATA[Desain, Simulasi dan Evaluasi Biaya Pembangkit Listrik Tenaga Surya 5 MW di Universitas Tadulako menggunakan Pvsyst ]]>
<![CDATA[Irwan Mahmudi]]>;
<![CDATA[sholihah, ratih mar'atus]]>;
<![CDATA[Nurahani Amin]]>;
<![CDATA[Oktadli Pratama Simbaju]]>
<![CDATA[ Jurnal JE-UNISLA : Electronic Control, Telecomunication, Computer Information and Power System Vol 9 No 2 (2024): SEPTEMBER ]]>
Publisher : <![CDATA[Universitas Islam Lamongan ]]>
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DOI: 10.30736/je-unisla.v9i2.1313
<![CDATA[Energi matahari (solar) memberikan banyak manfaat bagi kehidupan manusia. Salah satu pemanfaatan energi surya yang dapat diimplementasikan adalah dalam bentuk Pembangkit Listrik Tenaga Surya (PLTS). Universitas Tadulako berkomitmen untuk melaksanakan PLTS secara mandiri. Salah satu upaya yang dilakukan adalah dengan memanfaatkan lahan yang luas sebagai lahan PLTS yang saling terhubung, yang sering disebut dengan PLTS on-grid atau grid-connected. PLTS on-grid merupakan sistem PLTS yang terhubung dengan jaringan distribusi PLN. Pada sistem ini, jaringan listrik PLN berperan sebagai penyalur atau penyambung arus listrik yang berasal dari panel surya yang disalurkan ke beban. Dari hasil pengukuran diketahui luas lahan kosong Universitas Tadulako menurut masterplan UNTAD sekitar 5 hektar. Melalui software PVSyst total daya yang dihasilkan oleh PV sebesar 5544 kWp dan total daya inverter sebesar 4620 kWac dengan total PV terpasang sebanyak 10080 panel. Panel tersebut terhubung dengan 42 inverter. Setiap satu unit inverter mempunyai 12 string dan setiap string pada inverter terdiri dari 20 panel surya. Dari hasil tersebut, investasi sistem PLTS di Universitas Tadulako diperkirakan mencapai Rp. 75.907.251.114,00.]]>
<![CDATA[Implementation of modified trapezoidal commutation scheme for speed control of 1 kW BLDC motor ]]>
<![CDATA[Sholihah, Ratih Mar'atus]]>;
<![CDATA[Fahrul, Fahrul]]>;
<![CDATA[Kurniawan, Adhika]]>;
<![CDATA[Mahmudi, Irwan]]>
<![CDATA[ Journal of Mechatronics, Electrical Power, and Vehicular Technology Vol 14, No 2 (2023) ]]>
Publisher : <![CDATA[National Research and Innovation Agency ]]>
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DOI: 10.14203/j.mev.2023.v14.127-137
<![CDATA[The commutation process in brushless DC (BLDC) motors is done electrically and depends on the rotor position feedback. The Six-Step method is the most commonly used method in BLDC control, as it is easy to implement. However, this method has a high root mean square (RMS) current. On the other hand, a perfect sinusoidal commutation method is very complicated. Therefore, this research proposes a simple modified scheme of trapezoidal commutation circuits that can produce sinusoidal BLDC output voltage. This circuit can still responsively control the speed of the BLDC motor. This scheme uses 2 Arduinos. Pulse width modulation (PWM) signal from Arduino2 is then combined with hall signals from Arduino1, resulting in six outputs which are modified electrical commutation signals. This commutation signal is used as a MOSFET controller in a 3-phase inverter to produce a sinusoidal waveform. The average efficiency obtained when implementing the commutation is 75 % at low and high speeds.]]>
