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Journal articles on the topic 'Ac generator'

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Published: 4 May 2024

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1

Liang-Rui Chen and Neng-Yi Chu. "AC-Powered Pulse Generator." IEEE Transactions on Plasma Science 34, no. 5 (October 2006): 1858–65. http://dx.doi.org/10.1109/tps.2006.883420.

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2

Honorati, O., C. Caputo, F. Caricchi, and E. Santini. "Double armature AC generator." IEEE Transactions on Energy Conversion 4, no. 1 (March 1989): 102–8. http://dx.doi.org/10.1109/60.23160.

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3

Krismadinata, Derry Fiandri, Asnil, Irma Husnaini, Mohd Noor Abdullah, and Mukesh Singh. "Voltage and frequency regulation induction generator employing AC-AC converter." IOP Conference Series: Earth and Environmental Science 1281, no. 1 (December 1, 2023): 012039. http://dx.doi.org/10.1088/1755-1315/1281/1/012039.

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Abstract One of potential problem in induction generator is voltage and frequency instability. Induction generators (IG) can experience voltage and frequency fluctuations due to changes in the load. This paper presents a control strategy for voltage and frequency regulation of an induction generator using an electronic load controller (ELC). Three-phase AC-AC converter is employed as an ELC. The control system is designed to ensure the steady-state and transient stability of the IG under various operating conditions. The effectiveness of the proposed control method is demonstrated through simulation. MATLAB/Simulink software is utilized to analyze and verified the proposed control method. The simulation results show that it can provide accurate voltage and frequency regulation while maintaining stable operation of the IG. The proposed approach offers a promising solution for IG applications in renewable energy systems, where precise control of voltage and frequency is crucial for efficient and reliable power generation
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4

Sikorski, A., and M. Korzeniewski. "AC/DC/AC converter in a small hydroelectric power plant." Bulletin of the Polish Academy of Sciences: Technical Sciences 59, no. 4 (December 1, 2011): 507–11. http://dx.doi.org/10.2478/v10175-011-0062-6.

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AC/DC/AC converter in a small hydroelectric power plant The article discusses application of AC/DC/AC converter cooperating with an induction generator in small hydroelectric power plants. The induction generator works with power grid or a separated group of receivers, enabling to generate power even at low speeds of the turbine. The article provides also results of the investigation concerning the functioning of the generator coupled with AC/DC/AC converter in steady and transient states during start-up and voltage decay.
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5

Kumagai, M., T. Tanaka, K. Ito, Y. Watanabe, K. Sato, and Y. Gocho. "Development of Superconducting AC Generator." IEEE Transactions on Energy Conversion EC-1, no. 4 (December 1986): 122–29. http://dx.doi.org/10.1109/tec.1986.4765785.

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6

Kumagai, M., T. Tanaka, K. Ito, Y. Watanabe, K. Sato, and Y. Gocho. "Development of Superconducting AC Generator." IEEE Power Engineering Review PER-6, no. 12 (December 1986): 48–49. http://dx.doi.org/10.1109/mper.1986.5528072.

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7

Maki, N., K. Yamaguchi, M. Takahashi, and R. Shiobara. "Development of superconducting AC generator." IEEE Transactions on Magnetics 24, no. 2 (March 1988): 792–95. http://dx.doi.org/10.1109/20.11343.

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8

Supriyatna, Deddy. "Analysis of Power Efficiency Produced by AC and DC Generators: A Literature Review." MOTIVECTION : Journal of Mechanical, Electrical and Industrial Engineering 5, no. 2 (March 12, 2023): 261–68. http://dx.doi.org/10.46574/motivection.v5i2.211.

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In the life of the modern era, electricity has become one of the supporters of the energy supply to meet all of human's daily needs. Electricity can be generated from the conversion of natural energy such as sunlight, wind, coal and so on. Generators have become modern renewal machines that can convert mechanical energy into electrical energy. Generator with a work system that utilizes wire coils as a conductor of electricity and the stator and rotor work continuously to convert motion energy into electrical energy. This study aims to answer the problem regarding the efficiency between the two types of AC and DC dynamos. As well as to find out which type of dynamo is suitable for a particular electrical component. The data collection technique was carried out using a System Literature Review (SLR) which was used to identify and study theoretically the power efficiency generated by AC and DC generator dynamos. Dalam kehidupan era modern, listrik telah menjadi salah satu penyokong suplai energi untuk memenuhi semua kebutuhan manusia sehari-hari. Listrik bisa dihasilkan dari konversi energi alam seperti cahaya matahari, angin, batu bara dan sebagainya. Generator telah menjadi mesin pembaruan modern yang dapat mengubah energi mekanik menjadi energi listrik. Generator dengan sistem kerja yang memanfaatkan lilitan kawat sebagai penghantar listrik dan stator serta rotor yang bekerja terus menerus untuk mengkonversi energi gerak menjadi energi listrik. Penelitian ini bertujuan untuk menjawab permasalahan menngenai efisiensi antara kedua jenis dinamo AC dan DC. Serta untuk mengetahui dinamo tipe mana yang cocok untuk sebuah komponen listrik tertentu. Teknik pengumpulan data dilakukan dengan System Literature Review (SLR) yang digunakan untuk mengidentifikasi serta mengkaji secara teori mengenai efisiensi daya yang dihasilkan dinamo generator AC dan DC.
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9

Noda, Kaito, Hiromasa Sasa, Hiroshi Miyazaki, Shun Miura, Takashi Yoshida, Teruyoshi Sasayama, Masataka Iwakuma, et al. "Numerical simulation of a high-power density 10 MW REBCO superconducting synchronous generator cooled by sub-cooled LN2 for low AC loss." Journal of Physics: Conference Series 2323, no. 1 (August 1, 2022): 012037. http://dx.doi.org/10.1088/1742-6596/2323/1/012037.

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Abstract Generators used in electric aircraft require a high-power density, and AC loss is also a significant problem. We designed 10 MW REBCO superconducting synchronous generators at 64 K to achieve a power density of 20 kW/kg and low AC loss. In this study, electromagnetic analyses were performed using finite element method software. Consequently, the thickness of the back yoke is 50 mm or less so that the generator can meet the target power density. The method of decreasing the magnetic field of the armature winding and increasing that of the field winding was used to effectively reduce the AC loss. As a result, the generator achieved a high-power density of 21.0 kW/kg, reducing the AC loss from over 600 kW to 415 kW.
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10

Pei, Wei, Geng Liang, Xuying Gao, and Xiangyu Feng. "Research on AC Excitation Regulation Control System for Synchronous Generators." Academic Journal of Science and Technology 6, no. 2 (June 27, 2023): 31–34. http://dx.doi.org/10.54097/ajst.v6i2.9441.

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Although there are many methods for classifying the excitation systems of synchronous motors, there are three types of excitation systems for synchronous motors based on the numerous methods of providing excitation power to synchronous generators. One is a DC excitation system, the second is an AC excitation system, and the other is a static excitation system. This paper mainly studies the AC excitation system. The rotor speed of AC excited generators is variable and has excellent characteristics such as improving power system stability, allowing for deep operation without losing step. AC excitation generators not only have variable speed and constant frequency power, but also have independent adjustment functions for speed, reactive power, and effective power. The use of high-performance variable frequency excitation power supplies and appropriate excitation control methods can maximize the reliability, operational flexibility, and exceptional adjustment performance of AC excitation generators. The excitation system is an important part of synchronous generator operation. A good excitation system not only ensures the stable and reliable operation of the generator, but also greatly improves the stability of the motor and power system.
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11

Sikorski, A., and A. Kuźma. "Cooperation of induction squirrel-cage generator with grid connected AC/DC/AC converter." Bulletin of the Polish Academy of Sciences: Technical Sciences 57, no. 4 (December 1, 2009): 317–22. http://dx.doi.org/10.2478/v10175-010-0134-z.

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Cooperation of induction squirrel-cage generator with grid connected AC/DC/AC converter The paper presents a squirrel-cage induction machine operating as a generator principally designed for use in small wind and hydroelectric power stations. The main advantages of such a generator are its high reliability, low price and costs of operation and maintenance. The asynchronous generator coupled to the grid through the AC/DC/AC converter is capable of generating energy even at low turbine speed. The results of investigations on the AC/DC and DC/AC converters controlled by linear and nonlinear current regulators are also discussed.
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12

Setiawan, Andi, Widjonarko Widjonarko, and Candrika Kumaratungga. "SYNCHRONOUS AC CHOPPER FOR UNIVERSAL MOTOR SPEED CONTROL USING FUZZY LOGIC." Frontier Energy System and Power Engineering 3, no. 2 (July 1, 2021): 13. http://dx.doi.org/10.17977/um049v3i2p13-24.

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The use of Universal type motors is very commonly used, both in daily life and in research activities. The universal motor can be used as prime mover generator PMSG (Permanent Magnet Synchronous Generator), which in its application there are obstacles, namely the difficulty of stabilizing the speed due to the influence of changes in the load connected to the PMSG, this affects the output voltage generated by the system. In this case, a speed stabilizer system is needed to stabilize the output voltage generated based on the load given to the system. AC Chopper is one of the circuits that can be applied in a speed control system that functions as an AC-AC voltage regulator which is the input of the Universal motor. Synchronous AC Chopper is one type of AC Chopper circuit which according to previous research has better performance in terms of efficiency than Basic AC Chopper. As for this control system, Fuzzy Mamdani logic is flexible and has a tolerance on existing data with control results having a settling time of ±15 seconds and an average efficiency of 84.99%.
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13

Hendrawan, Nofrian Deny, Subiyantoro Subiyantoro, and Fathoni Fathoni. "Pengendali Tegangan Generator AC 3 FASA Dari Perubahan Arus Beban." Jurnal Elektronika dan Otomasi Industri 6, no. 3 (February 8, 2021): 35. http://dx.doi.org/10.33795/elkolind.v6i3.167.

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Pada penelitian ini dibuat modul untuk pengaturantegangan generator AC 3 fasa magnet tidak permanen.Padapenelitian sebelumnya, menggunakan Generator AC 1 fasadengan tegangan output tidak dikontrol. Oleh karena itu alatini dibuat agar tegangan outputya dapat dikontrol, sertadigunakan sebagai modul praktikum khususnya untukpembelajaran di lab Elektronika Daya.Pada modul pembelajaran ini akan dianalisapengaruh arus beban terhadap tegangan output generator AC 3Fasa. Supply pada modul ini menggunakan power supplysebagai sumber untuk menggerakkan motor DC yangdihubungkan ke generator AC 3 fasa menggunakanpulley.Numbpaddigunakkan untuk memasukkan teganganoutput yang diinginkan dengan range 6V – 12V , dan apabilaterjadi perubahan beban otomatis tegangan output akan ikutberubah , untuk menjaga tegangan output generator konstan diset point yang diinginkan maka dikontrol dengan PWM( Pulse With Modulation ) menggunakan mikrokontrolerAmega16dengan metode PI. Hasil dari pengujian yangdilakukan, alat tersebut dapat digunakan sebagai modulpengendali tegangan output generator AC 3 fasa dengansupplyarusexciteryang dikontrol menggunakanmikrokotroler. Saat input tegangan 8V tanpa beban makategangan output akan berosilasi tinggi mendekati overshoot,dan ketika dibebani dengan resistor 2k2 Ohm dengan setpointyang sama tegangan output generator memiliki maksimumpeak ( mp ) sebesar 8,1V.Sehingga meskipun beban berubahmaka tegangan akan tetap stabil ditegangan yang sudahdimasukkan.
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14

Zhu, Wu, Xiang Cun Tu, and Chang Chun Qu. "The Review of Technology of Power Quality Disturbances Generator." Advanced Materials Research 383-390 (November 2011): 1441–46. http://dx.doi.org/10.4028/www.scientific.net/amr.383-390.1441.

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To test the Electric equipment’s immunity to voltage disturbances, a special power quality disturbances generator was needed. According to the principles of power quality disturbances generator, they were divided into the following types: the form of arbitrary waveform generator adds amplifier, the combination of transformers in series or parallel mode, regulating transformer tap position, thyristor controlled reactor, AC/DC/AC converter and the other traditional methods in this paper. This paper discusses the main technology characteristics of implementations in detail, describes different kinds of equipment using occasions, summarizes the advantages and disadvantages of all principles and points out the using prospect and promotion of all kinds generators in future.
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15

Savir, Jacob, and Robert Berry. "AC strength of a pattern generator." Journal of Electronic Testing 3, no. 2 (May 1992): 119–25. http://dx.doi.org/10.1007/bf00137249.

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16

Mazurenko, L. I., O. V. Dzhura, M. O. Shykhnenko, and A. V. Kotsiuruba. "MODIFICATION OF THE MASTER GENERATOR METHOD USED FOR FREQUENCY AND VOLTAGE CONTROL IN ISOLATED POWER SYSTEMS WITH PARALLEL OPERATING AC GENERATORS." Tekhnichna Elektrodynamika 2023, no. 2 (February 23, 2023): 28–36. http://dx.doi.org/10.15407/techned2023.02.028.

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Such methods as droop method, curve shifting method and master-slave method were primarily developed for voltage and frequency regulation in isolated power systems with synchronous generators. In modern power systems induction generators, regulated dump loads, energy storage devices with AC/DC and AC/DC/AC power converters, etc. are used in addition to synchronous generators. The investigation of new configurations of power systems is closely tied with further development of control methods for load sharing and regulation of voltage and frequency of the systems. The article reviews simple-to-implement known control methods used for control of isolated power systems with parallel operated synchronous generators and proposes a modification of the master-slave method for control of power systems with parallel operated synchronous and induction generators, static var compensators, dump loads and energy storage devices with interface power converters. The system “Hydroelectric unit with a synchronous generator - dump load - hydroelectric unit with an induction generator - compensating capacitors - transformer – AC local load" is considered and two techniques for regulation of electric frequency and voltage magnitude in the specified system are presented with accordance to the statements of the proposed modified method. The proposed control algorithm of the dump load frequency controller is in agreement with the control algorithm of the speed controller of the master unit. The functions assigned to the electronic PID speed controller of the master unit are to maintain the electric frequency in the system equal to nominal value and regulate the active power sharing. Verification of the proposed control algorithms for isolated electric power systems was carried out. References 23, figures 5, table 1.
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17

Golwa, Gian Villany, Fajar Anggara, and Imam Hidayat. "Studi potensi listrik dari hembusan angin luaran air conditioner." Jurnal Teknik Mesin Indonesia 18, no. 2 (October 1, 2023): 53–58. http://dx.doi.org/10.36289/jtmi.v18i2.464.

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Penggunaan pendingin ruangan alias air conditioner (AC) akan mengonsumsi banyak tenaga listrik di dunia. Menurut prediksi Badan Energi Internasional alias International Energy Agency (IEA) konsumsi listrik untuk AC akan jadi pemicu utama melonjaknya permintaan listrik dunia pada 2050. Data Badan Pusat Statistik (BPS) pada Maret tahun 2017 menunjukkan 7,98% rumah tangga di Indonesia yang menggunakan AC. Kecepatan angin yang keluar dari kondesor pada AC dengan kapasitas 0,5-2 PK memiliki kecepatan rata-rata 4,83 m/s. Kajian ini akan melakukan pengujian potensi listrik yang dapat dihasilkan dari hembusan angin luaran AC dengan 2 jenis prototipe generator. Kedua jenis generator tersebut akan diuji secara langsung pada unit exhaust AC. Hasil pengujian menunjukkan dengan rata-rata kecepatan angin 4,83 m/s pada generator vertical blade dengan 12 sudu pada blade dapat menghasilkan hingga tegangan 7 volt, dan pada generator horizontal blade dengan 6 kumparan yang masing-masing kumparan 300 lilitan didapat tegangan listrik hingga 14,82 Volt. Kesimpulan dari kajian ini, generator horizontal blade cukup untuk menyuplai listrik ke baterai sebelum dikonsumsi.
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18

Widyantoro, Ricky Kristya, Fathoni Fathoni, and Subiyantoro Subiyantoro. "Pengendali Frekuensi Generator AC 3 FASA Dari Perubahan Arus Beban." Jurnal Elektronika dan Otomasi Industri 6, no. 2 (February 4, 2021): 55. http://dx.doi.org/10.33795/elkolind.v6i2.161.

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Penelitian dari pembuatan laporan skripsi ini adalah modul untuk pengaturan frekuensi generator AC 3 fasa magnet tidak permanen.Pada penelitian sebelumnya, menggunakan Generator AC 1 fasa dengan frekuensi tidak dikontrol. Oleh karena itu alat ini dibuat agar frekuensinya dapat dikontrol, serta digunakkan sebagai modul praktikum khususnya untuk pembelajaran di lab Elektronika Daya.Pada modul pembelajaran ini akan dianalisa pengaruh arus beban terhadap frekuensi generator AC 3 Fasa. Supply pada modul ini menggunakan Power Supply sebagai sumber untuk menggerakkan motor DC yang dihubungkan ke generator AC 3 fasa menggunakan pulley.Numbpaddigunakkan untuk memasukkan frekuensi yang diinginkan dengan range > 50hz – <100 hz , frekuensi >50 hz agar sama dengan dengan frekuensi tegangan AC dari PLN.Dan apabila terjadi perubahan beban otomatis frekuensi akan ikut berubah , untuk menjaga frekuensi generator konstan di set pointyang diinginkan maka dikontrol dengan PWM ( Pulse With Modulation ) menggunakan mikrokontroler Amega16dengan metode PI.Hasil dari skripsi ini adalah modul praktikum pengendali frekuensi generator AC 3 fasa dengan frekuensi konstan dari perubahan arus beban.Hasil dari pengujian yang dilakukan, alat tersebut dapat digunakkan sebagai modul pengendali frekuensi generator AC 3 fasa dengan pengerak motor DC yang dikontrol menggunakan mikrokotroler.Pada saat kita masukkan input frekuensi 100Hz tanpa bebanmaka frekuensi geneator akan berosilasi diantara setpoint yaitu antara 96Hz hingga 106Hz.Dan ketika dibebanidengan resistor 2k2 Ohm dengan setpoint yang sama frekuensi geneator akan berosilasi yaitu diantara 93Hz hingga 106Hz.Sehingga meskipun beban berubah maka frekuensi akan tetap stabil difrekuensi yang sudah dimasukkan.
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19

Msuya, R. A., R. R. Kainkwa, and M. I. Mgwatu. "Analysis of Power Efficiency of a Direct-Driven Locally Fabricated Permanent Magnet Ac Generator for Small-Scale Wind Power Applications in Tanzania." Tanzania Journal of Engineering and Technology 34, no. 2 (December 31, 2013): 84–93. http://dx.doi.org/10.52339/tjet.v34i2.461.

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The use of direct-driven permanent magnet alternating current (AC) generators offers the opportunity to reduced costs and increased system efficiency. This type of generator could be the best alternative for rural population whom are not connected to the national grid. To improve the design and efficiency of locally fabricated generators, it is imperative tocharacterize both their mechanical and electrical parameters. This paper presents the analysis of power efficiency of the synchronous permanent AC generator locally fabricated in Tanzania. In this case, load resistance and rotational speed are characterized using designed experiment. The output current and voltage of the generator were recorded simultaneously in each step change of load resistance and rotational speed. The output power and efficiency were then determined analytically. The results show that there is a linear relationship between voltage and rotational speed of the generator with and without load resistance. The results further indicated that out power is not linearly related to rotational speed. The generator•s power efficiency was found to be about 55% against both the output voltage and rotational speed.
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20

Rochman, Sagita, and Mochamad Taufiq Irvan Efendy. "Arduino Based Design of Horizontal Wind Power Generator for Coastal Road Lighting." BEST : Journal of Applied Electrical, Science, & Technology 3, no. 1 (March 15, 2021): 30–33. http://dx.doi.org/10.36456/best.vol3.no1.3540.

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Increasing energy demand, depleting fossil fuel reserves, and environmental concerns have put renewable energy sources in the spotlight in Indonesia. Wind energy in particular, which has received a lot of attention because it is inexhaustible and friendly to the environment. The main problem of the two generating systems is not continuously available. Wind turbines are the main medium used to convert wind energy into electrical energy. A good wind turbine design will determine the performance of a wind power plant (PLTB). This tool is to control the electric power generated from the wind generator, the electric power generated from the generator will be measured the current and voltage. The way the tool works when the generator wheel rotates, the generator will produce electrical power which has been connected to the charger controller before the electric power is stored in the battery. The use of electric power from the battery will be converted using an inverter to convert the DC current to AC. This research was conducted on wind turbine generators in the use of coastal street lighting as objects to generate electric power in order to reduce the need for PLN electricity. This research was conducted on wind turbine generators in the use of coastal street lighting as objects to generate electric power in order to reduce the need for PLN electricity. The generator will generate electrical power which has been connected to the charger controller before the electric power is stored in the battery. The use of electric power from the battery will be converted using an inverter to convert the DC current to AC. This research was conducted on wind turbine generators in the use of coastal street lighting as objects to generate electric power in order to reduce the need for PLN electricity
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21

Liu, Jian Ying, and Min Ma. "Research on the Control Principle of Aircraft AC Starter/Generator." Advanced Materials Research 816-817 (September 2013): 398–401. http://dx.doi.org/10.4028/www.scientific.net/amr.816-817.398.

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AC starter/generator is a new starting/generation dual-function technology applied to the aircraft. The previous pneumatic starter, brushed DC starter/generator or DC starter are replaced by the synchronous AC motor, thereby reducing the weight of airborne equipment effectively. Based on AC starter/generator driven by auxiliary power unit (APU) used on a certain type of aircraft, this paper mainly carries out the research on the composition of AC starter/generator system, starting process and its control principle, as well as demonstrates how the starting torque is controlled. Theoretical study shows that the torque can be precisely controlled through the control of the torque component of stator current when the rotor field oriented vector control strategy is adopted.
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22

Dermawan, Erwin, Prian Gagani Chamdareno, and Ady Rogo Priyono. "Studi Analisa Start-Up Gas Turbin Memanfaatkan Generator Utama sebagai Motor Penggerak Mula dengan Menggunakan Static Frequency Converter (Sfc) pada Unit Blok 1-2 PT. PJB Unit Pembangkitan Muara Tawar." RESISTOR (elektRonika kEndali telekomunikaSI tenaga liSTrik kOmputeR) 2, no. 2 (November 3, 2019): 83. http://dx.doi.org/10.24853/resistor.2.2.83-88.

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Abstrak Proses start-up pembangkit merupakan proses yang krusial dalam proses beroperasinya pembangkit. Proses start-up yang handal, aman dan efisien sangat diperlukan. Terutama pada PLTGU sebagai pembangkit peakload yang hampir setiap hari mengalami proses start-stop. Proses start-up gas turbin membutuhkan starting device yang handal, aman dan effisien sehingga proses start-up tercapai sesuai target. pada saat diminta oleh P2B untuk memenuhi kebutuhan jaringan. Static frequency converter digunakan pada PLTGU Muara Tawar untuk mengubah generator utama gas turbin menjadi motor starter pada saat proses start-up gas turbin. SFC digunakan mulai dari 0rpm hingga 2500rpm pada proses tersebut. Pada putaran 2500rpm, gas turbin diputar menggunakan bahan bakar utamanya (gas/hsd) yang sudah terjadi penyalaan sejak 700rpm. Generator utama yang merupakan generator sinkron diubah menjadi motor sinkron sebagai motor starter. SFC sendiri merupakan kontrol yang terdiri dari converter AC-DC dan DC-AC. Arus AC keluaran SFC merupakan arus AC yang terkontrol frekuensi dan tegangannya. Arus AC terkontrol tersebut dialirkan menuju stator generator dan arus DC dialirkan ke rotor generator.
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23

Ricky, Ricky, and Jaka Windarta. "Analisis Komparasi Perhitungan Teori dan Aktual Terhadap Daya Aktif dan Daya Reaktif Steam Turbine Generator 2.0 Pda PT Indonesia Power Semarang." Jurnal Energi Baru dan Terbarukan 1, no. 1 (June 12, 2020): 7–18. http://dx.doi.org/10.14710/jebt.2020.8133.

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Generator adalah alat yang digunakan untuk mengubah energi mekanik menjadi energi listrik. Generator terbagi menjadi 2 yakni generator AC dan generator DC. Yang membedakan dari keduanya itu adalah tegangan dan arus yang dihasilkan. Untuk AC bentuk gelombangnya bolak – balik sedangkan untuk DC gelombangnya searah. Generator AC banyak digunakan dalam sistem pembangkit tenaga listrik. Khususnya pada PLTGU PT. Indonesia Power Semarang PGU Blok Blok 2 menggunakan generator AC atau nama lainnya generator sinkron untuk menghasilkan energi listrik. Dimana energi mekanik yang digunakan bersumber dari turbin gas dan turbin uap.yang dikopel dengan generator. Untuk menghasilkan energi listrik, tentu ada tata perhitungan yang dibutuhkan untuk mengatur nilai daya yang dihasilkan. Dalam penjualan daya yang dihasilkan PLTGU PT. Indonesia Power Semarang PGU tentu terdapat ketentuan mendasar seperti nilai daya yang dijual berapa banyak dan mendasar pada data operasi yang ditampilkan dari kombinasi sistem pengukuran daya. Dimana dalam konteks daya tentu ada yang namanya faktor daya. Dalam laporan analisa ini penulis akan membuktikan mengenai kesesuaian hasil perhitungan dengan nilai aktual pada data operasi. Apabila ditemukan perbedaan nilai antara data operasi dengan perhitungan yang disebabkan pengaruh faktor daya maka perlu dilakukan inspeksi peralatan pengukuran seperti pada Steam Turbine 2.0 PLTGU PT. Indonesia Power Semarang PGU.
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24

Irfan Alwanahda. "PEMODELAN FULL SISTEM KENDALI MENGGUNAKAN APLIKASI PSIM PADA TURBIN ANGIN SKALA MIKRO THE SKY DANCER 500 DI PT LENTERA BUMI NUSANTARA." BUANA ILMU 6, no. 2 (May 31, 2022): 83–100. http://dx.doi.org/10.36805/bi.v6i2.2342.

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Upaya dalam pengembangan menggunakan energi baru terbarukan telah di lakukan, salah satunya di LBN ( Lentera Bumi Nusantara ) bertempatkan di desa Ciheras dengan skala mikro. LBN sendiri menggunakan generator The Sky Dancer dengan spesifikasi daya keluaranya 500 W, arus 3A dan tegangan 180V AC tiga fasa. Sistem turbin angin ini terdiri dari beberapa komponen penyusun, diantaranya: bilah, generator, kontroller, data loger, baterai, inverter dan beban. Cara kerja dari sistem turbin angin mikro ini yaitu, energi angin memutar bilah, lalu bilah memutar generator. Dimana keluaran daya dari generator ini berupa gelombang tegangan AC yang kemudian masuk kedalam bagian kontroller yang berfungsi untuk meng-konversikan tegangan AC menjadi gelombang tegangan DC sebelum masuk ke baterai 24V dan 25V. Proses untuk mengalirkan listrik dari baterai ke beban atau ke rumah-rumah yaitu melalui inverter terlebih dahulu untuk diubah kembali kedalam gelombang tegangan AC 220v dan 50hz. Kata kunci: Controller, Tegangan, Generator.
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Mazumder, Atanu, Asif Hasan, Arafat Hossain Ayon, and Dewan Hasan Ahmed. "Energy Recovery from Exhaust Gas of Diesel and Petrol Engine by Turbo-electric Generator." International Journal of Automotive and Mechanical Engineering 19, no. 2 (July 20, 2022): 9823–33. http://dx.doi.org/10.15282/ijame.19.2.2022.16.0758.

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A turbo-electric generator has been placed on the exhaust port of the petrol and diesel engines to investigate the possibility of recovering energy from the exhaust gas. Turbo-electric generator is a combination of a turbocharger and a generator. The aim of the study is to find the possibility and effectiveness of the turbo-electric generator for recovering the energy from the exhaust gas of an engine. The test has been conducted on the two engines, i.e. first one is TD 202 small test engine bed (diesel engine) and another one is Honda CG125 cc (petrol engine) motorcycle. Two types of motor i.e. DC motor and AC motor have been used as generators by altering the way a motor works. Firstly, a DC motor is used as a generator in the turbo-electric generator for both test engines. The results show that turbo-electric generator recover less than 1% energy of the exhaust gas for both engines when a DC motor is used as a generator (TD 202 and Honda CG125 cc motorcycle). But in case of Honda CG125 cc motorcycle, the percentage of recovering energy is comparatively higher than the TD 202 test engine. The experiment is further extended by using an AC motor as a generator only for the Honda CG125 cc motorcycle. The results show better energy recovering from exhaust gas through turbo-electric generator, which is more than 1% of exhaust gas. The results reveal that the engine speed and the mass flow rate of the exhaust gas play a major role in harvesting the energy from the exhaust gas. Moreover, it is found that the turbo-electric generator module provides good efficiency when an AC motor is used as a generator in the module. The experimental results have been compared with available literature.
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Setlak, Lucjan, and Rafał Kowalik. "The Study of Permanent Magnets Synchronous Machine (PMSM) of the Autonomous Electric Power Supply System (ASE), compatible with the Concept of a More Electric Aircraft (MEA)." ITM Web of Conferences 16 (2018): 03001. http://dx.doi.org/10.1051/itmconf/20181603001.

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Based on the analysis and mathematical models of synchronous electric machines (motor/generator), basing on permanent magnets, presented in this paper, the main importance of alternator AC power sources in the form of starter/generator (for conventional aircraft) and in the form of integrated unit starter (motor)/AC synchronous generator S/G AC (with respect to advanced aircraft concept in terms of more electric aircraft) was highlighted. Additionally, through the analysis and selected simulations of the on-board autonomous power supply system of the modern aircrafts, sources of electrical energy (synchronous motor/generator, integrated unit starter/AC generator) were located in board autonomic power system ASE (EPS, PES). Main components of this system are the electro-energetic power system EPS and the energo-electronic power system PES. In addition, the analysis and exemplary simulations of main electricity sources based on mathematical models have contributed to highlighting the main practical applications in accordance with the concept of MEA.
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Xie, Linghong, Miao Li, and Falun Huang. "Asymptotic almost periodicity ofC-semigroups." International Journal of Mathematics and Mathematical Sciences 2003, no. 2 (2003): 65–73. http://dx.doi.org/10.1155/s0161171203108034.

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28

Safi, S. K., and J. R. Bumby. "Design optimisation of a superconducting AC generator." IEE Proceedings B Electric Power Applications 140, no. 4 (1993): 267. http://dx.doi.org/10.1049/ip-b.1993.0033.

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Cheng, Siwei, and Thomas Habetler. "Using Only the DC Current Information to Detect Stator Turn Faults in Automotive Claw-Pole Generators." Industrial Electronics, IEEE Transactions on 60, no. 8 (April 2013): 3462–71. http://dx.doi.org/10.1109/tie.2012.2205353.

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The stator turn-to-turn short circuit is an important type of fault in automotive claw-pole generators. In a typical vehicle electric power system, the built-in rectifier of the generator makes it difficult to access the ac current or voltage information, rendering conventional sequence-component-based fault-detection methods useless. To detect such fault using only the available sensor information, a dynamic model of the claw-pole generator with stator turn faults is derived in this paper to analyze how the fault would interact with the connected battery and the static full-bridge rectifier and how it would affect the generator's output voltage and current. It is found that, in the rectified generator output current, the harmonic at one-third of the rectifier ripple frequency is a robust signature of the stator turn fault. The performance of the stator turn-fault detector is demonstrated by extensive experimental results. Although the fault detector is originally proposed for claw-pole generators, it is also applicable to most polyphase ac generators with a dc-link rectifier.
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Setlak, Lucjan, and Rafał Kowalik. "Model and Simulation of Permanent Magnets Synchronous Machine (PMSM) of the Electric Power Supply System (EPS), in Accordance with the Concept of a More Electric Aircraft (MEA)." ITM Web of Conferences 16 (2018): 03004. http://dx.doi.org/10.1051/itmconf/20181603004.

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Based on the mathematical model of synchronous electric machine, basing on permanent magnets, presented in this paper, the key importance of alternator AC power sources in the form of generator (for conventional aircraft) and in the form of integrated unit starter/AC synchronous generator S/G AC (with respect to advanced aircraft concept in the field of more/all electric power MEA/AEA) was highlighted. In addition, through the analysis and selected simulations of the power supply system of a modern aircrafts, sources of onboard electrical energy (synchronous generator, integrated unit starter/AC generator) were located in board autonomic power system ASE (EPS, PES). Key components of this system are the electro-energetic power system EPS and the energo-electronic power system PES. Additionally, the analysis and exemplary simulations of key electricity sources based on mathematical models have contributed to highlighting the main practical applications in line with the trend of a more electric aircraft.
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31

Ba, Lian Liang, Hui Chen, and Chao Sun. "Voltage Control Principle Analysis of Permanent Magnet Generator." Advanced Materials Research 179-180 (January 2011): 1402–7. http://dx.doi.org/10.4028/www.scientific.net/amr.179-180.1402.

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The permanent magnet generator has small size, simple structure, light weight, low cost, simple process, and eliminates the need for rectifier generator excitation windings and easy problems of the collector ring and brush devices, etc, are widely application. In recent years, a variety of good performance permanent magnet generators have been developed, but these generators are AC power output and generally low, when load changes the output voltage changes greater. Through the magnetism of permanent magnet generator, using good performance electronic components, a new type of intelligent electronic controller is developed; using the electronic regulator and the developed generator, the DC electrical power for vehicles required is solved.
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Apriani, Yosi. "Rancang Bangun Inverter Pada Generator Aksial Satu Phasa." Electrician 14, no. 3 (October 19, 2020): 71–75. http://dx.doi.org/10.23960/elc.v14n3.2154.

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Inverter dapat mengubah arus listrik searah (DC) menjadi arus listrik bolak-balik (AC), dari tegangan input 12 V DC menjadi tegangan output 220 V AC, dengan kebutuhan daya tergantung dari kebutuhan beban yang terpasang pada inverter. Inverter dirancang pada daya maksimum 400 W dan daya aki/baterei inverter sebesar 600 W. Tujuan penelitian ini adalah membuat suatu perangkat elektronik yang bisa menjadi sumber energi listrik dengan mengubah arus DC menjadi arus AC, yang memanfaatkan baterei/aki sebagai sumber energi listrik arus DC. Metode penelitian yang digunakan dalam penelitian ini menggunakan diagram flowchart yang memiliki tahapan sebagai berikut: 1). Merancang rangkaian inverter, 2). Merakit rangkaian inverter sesuai rancangan, 3). Menguji hasil rancang bangun inverter dengan menggunakan lampu pijar, 4). Menghitung dan menganalisa hasil perancangan. Hasil penelitian didapat daya output Inverter tegangan tinggi 220 V AC dengan beban 360 W akan mencapai daya maksimal inverter sebesar 402,77 W. Besarnya daya output ini dipengaruhi oleh arus standby inverter sebesar 0,317 A.
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Liu, Yingzhen, Francesco Grilli, Jiwei Cao, Liyi Li, Chengming Zhang, Mingyi Wang, Fengyu Xu, Jingbo Lin, and Mathias Noe. "An Electromagnetic Design of a Fully Superconducting Generator for Wind Application." Energies 14, no. 22 (November 22, 2021): 7811. http://dx.doi.org/10.3390/en14227811.

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A fully superconducting wind generator employs superconductors in stator and rotor to enable high torque density and low weight, that is, enable an ultra-light electric machine for wind application. However, the level of the AC loss of the stator armature coils is a critical issue, which lacks investigations in the design of the fully superconducting generators. In this paper, an in-house model was developed to analyze the potential of a fully superconducting generator by integrating the electromagnetic design with the AC loss estimation. The electromagnetic model was made through analytical equations, which take into consideration the geometry, the magnetic properties of iron, and the nonlinear E–J constitutive law of superconductors. Since the permeability of iron materials and the critical current of the superconductors depend on the magnetic field, an iteration process was proposed to find their operating points for every electromagnetic design. The AC loss estimation was carried out through finite element software based on the T–A formulation of Maxwell’s equations instead of analytical equations, due to the complexity of magnetic fields, currents and rotation. The results demonstrate that the design approach is viable and efficient, and is therefore useful for the preliminary design of the generator. In addition, it is found that smaller tape width, larger distance between the superconducting coils in the same slot, smaller coil number in one slot and lower working temperature can reduce the AC loss of the stator coils, but the reduction of the AC loss needs careful design to achieve an optimum solution.
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34

Gopa Kumar, S. "Matrix Converter for PMSG based WECS Using Duty Ratio Based Switching with FOC." Asian Journal of Electrical Sciences 3, no. 1 (May 5, 2014): 35–40. http://dx.doi.org/10.51983/ajes-2014.3.1.1915.

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This paper presents the direct AC to AC converter for Permanent Magnet Synchronous Generator (PMSG) based wind urbine. The direct AC to AC matrix converter is intended between the PMSG wind turbine and the grid. The power generated by the wind turbine is synchronized with the grid parameters through the converter. A modulation scheme based on duty ratio is proposed. Depending upon the duty ratio the switching of matrix converter is done. Conventional ACDC- AC back to back converter is replaced by direct AC to AC converter. The modulation scheme can be also implemented using Field Programmable Gate Array (FPGA) so that the computational speed can be improved. The machine side control is done by Field Oriented Control (FOC). A three phase to three phase matrix converter is simulated using MATLAB simulink software and the results are shown.
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Setyaji, Yudisthira, and Bismil Rabeta. "Pembuatan Generator Sistem Pada Alat Peraga Engine Doryz–95." Jurnal Mahasiswa Dirgantara 1, no. 2 (January 27, 2023): 1–8. http://dx.doi.org/10.35894/jmd.v1i2.59.

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Sistem kelistrikan pada pesawat terbang terbagi menjadi dua yaitu AC power listrik dan DC power listrik, di mana pada AC power listrik itu sendiri merupakan power listrik yang keluaran arus nya bolak-balik sedangkan untuk arus DC yaitu pada arus ini keluaran arus yang dihasilkan dari suatu pembangkit tenaga menghasilkan arus searah, jadi pada arus DC ini terdapat dua terminal yaitu positif dan negative, dikarenakan arus ini searah jadi mengharuskan sesuai dengan terminalnya. Pada sebuah pesawat terbang, AC pada sebuah pesawat terbang dihasilkan melalui salah satu komponen yang bernama generator, sedangkan untuk arus DCdihasikan dari sebuah baterai, dan tetapi ada beberapa kasus juga di sebuah generator menghasilkan arus DC. Dalam pembuatan generator ini terdiri dari beberapa tahap, tahap pemilihan dinamo, tahap pemilihan bahan sebagai body generator, tahap perakitan generator, terakhir tahap pengeleman generator ke engine. Pada pembuatan generator ini menghasilkan 1,0 volt pada 14,939 rpm sehingga dapat digunakan untuk menyalakan relay sebagai switch anti-icing serta lampu merah pada engine DORYZ. Pada zaman saat ini alatperaga sangat dibutuhkan dalam dunia pendidikan untuk mempermudah memahami pembelajaran secara langsung dan tepat ke para mahasiswa. Oleh karena itu pembuatan generator sistem pada alat peragaengine DORYZ-95 ini dibuat untuk mempermudah pembelajaran.
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Yesemo, Doni, Altje Wajong, Fransiskus Seke, and Viverdy Memah. "Rancang Bangun Alat Sinkron Generator 1 Fasa dengan Sistem AC–DC-AC Menggunakan Papan Driver EGS002." JURNAL EDUNITRO: Jurnal Pendidikan Teknik Elektro 2, no. 1 (April 1, 2022): 1–8. http://dx.doi.org/10.53682/edunitro.v2i1.3277.

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Abstract– This study aims to produce a single-phase synchronous generator with an AC-DC-AC system using an EGS002 driver board that produces a pure sine wave of 50 Hz. This synchronous device system first converts alternating current (AC) to direct current (DC) to facilitate the generator synchronization process, then converts it back into alternating current (AC). The EGS002 driver board uses IC EG8010 as a control chip and IR2113S as a driver chip that produces square waves with two frequencies: low frequency 50 Hz and high frequency ± 1 KHz. The EGS002 driver board generates a square wave, then amplified by a full-bridge IGBT. This synchronous device uses a series of inductors with a capacitor as a lowpass filter which converts both square waves into a pure sine wave of 50 Hz. Abstrak– Penelitian ini bertujuan untuk menghasilkan alat sinkron generator 1 fasa dengan sistem AC-DC-AC menggunakan papan driver EGS002 yang mengeluarkan gelombang sinus murni 50 Hz. Sistem alat sinkron ini terlebih dahulu merubah arus bolak-balik (AC) ke arus searah (DC) untuk mempermudah proses sinkronisasi generator, kemudian diubah kembali menjadi arus bolak-balik (AC). Papan driver EGS002 menggunakan IC EG8010 sebagai chip control dan IR2113S sebagai chip driver yang menghasilkan gelombang kotak dengan dua jenis frekuensi yaitu: low frekuensi 50 Hz dan high frekuensi ± 1 KHz. Papan driver EGS002 menghasilkan gelombang kotak, kemudian dikuatkan oleh IGBT yang disusun full-bridge untuk menghasilkan daya yang lebih besar. Alat sinkron ini mengunakan rangkaian induktor diseri dengan kapasitor sebagai lowpass filter yang mengubah kedua gelombang kotak menjadi gelombang sinus murni 50 Hz.
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Zhang, Chuan Cheng, Cui Hui Yan, Sai Dai, Dan Xu, Yi Zhu, and Wei Dong. "Improved Probabilistic Load Flow Method to Consider Random Generator Outages." Advanced Materials Research 962-965 (June 2014): 2783–88. http://dx.doi.org/10.4028/www.scientific.net/amr.962-965.2783.

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In conventional cumulant method of probabilistic load flow (PLF), random generator outages are usually simulated by discrete distributions of nodal power injections, but that will lead to significant error in AC load flow model. An improved PLF method base on AC model is proposed in this paper, which considers random generator outages and loads uncertainties. Cumulant and Gram-Charlier series expansion were applied to deal with the random variations of loads, instead of convolution calculations. According to the characteristics and focused aspects of power grid, certain generators were selected to form event group of generator outages and each event was analysed by exact load flow.Then total probability theorem was introduced to obtain the probabilistic distributions of node voltages and line flows that considered random factors of loads and generators.The case study of IEEE 39-bus system shows that the random generator outages remarkably affect the probabilistic distributions of state variables. The proposed method can avoid the error caused by generator outages in conventional cumulant method. Furthermore, the result of proposed method is consistent with that of Monte Carlo simulation, while computation speed is much faster.
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38

Saputra, Zanu, Hasdiansah Hasdiansah, Medeline Citra Vanessa, Hairullah Hairullah, and Dherry Riski Andhika. "Uji Performa Generator AC 3 phase untuk Pembangkit Listrik Tenaga Piko Hidro Skala Laboratorium." RESISTOR (Elektronika Kendali Telekomunikasi Tenaga Listrik Komputer) 6, no. 1 (May 31, 2023): 79. http://dx.doi.org/10.24853/resistor.6.1.79-84.

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Kebutuhan akan energi listrik saat ini semakin meningkat sehingga energi ini menjadi sumber energi utama yang paling penting. Salah satu upaya untuk memenuhi kebutuhan tersebut dikembangkan Pembangkit Listrik Tenaga Piko Hidro (PLTPH) dengan turbin archimedes screw bilah lima. Dalam pengembangannya dilakukan uji performa generator magnet permanen AC 3 phase dengan kapasitas daya sebesar 500 Watt. Tujuan dari pengujian ini adalah untuk mendapatkan karakteristik output generator sehingga bisa diimplementasikan secara riil. Metode pengujian dilakukan dengan cara menghubungkan poros generator dan poros motor DC shunt dengan kecepatan putaran motor DC dapat dikontrol. Sensor INA219 dan LM393 digunakan untuk mendeteksi nilai arus, tegangan, rpm yang dihasilkan generator selanjutnya diolah menggunakan mikrokontroler. Data real time dapat dimonitoring pada komputer, LCD dan smart phone menggunakan aplikasi blynk. Hasil pengujian menunjukkan bahwa nilai tegangan yang dapat dihasilkan generator dengan penggerak Motor DC pada kondisi optimum yaitu sebesar 45 V AC pada 620 rpm dan pada kondisi minimum menghasilkan 8 V AC pada 91 rpm.
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Kastawan, I. Made Wiwit. "Effect of load current harmonics on vibration of three-phase generator." MATEC Web of Conferences 197 (2018): 11023. http://dx.doi.org/10.1051/matecconf/201819711023.

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Almost all today electrical loads are considered non-linear such as switch mode power supply (SMPS) for powering computer and mobile phone or variable speed drive (VSD) for driving home and industrial electric motors. These loads generate ac non-sinusoidal current containing a lot of harmonics as indicated by its high total harmonics distortion (THD) figure. Current harmonics bring negative effects into all electrical power system components, including three-phase generator. This paper provides analysis of load current harmonics effects on vibration of three-phase generator. Three different laboratory experiments have been conducted i.e. three-phase linear resistive loading, non-linear loading with a three-phase ac/dc converter and non-linear loading with three single-phase capacitor filtered ac/dc converters. Results show that the higher load current harmonics content the higher is vibration of the three-phase generator. Non-linear loading with a three-phase ac/dc converter that generate about 24.7% THD gives an increase of 4.3% and 5.5% in average of vertical and horizontal vibrations of the three-phase generator respectively. Further, non-linear loading with three single-phase capacitor filtered ac/dc converters that generate THD as high as 74.9% gives significant increase of 28.1% and 23.6% in average of vertical and horizontal vibrations respectively.
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Verma, Deepak Sheshbadan, Sumit Satish Pai, and Krishna Nagendra Vishwakarma. "Implementation of IoT-Based Generator Management System Using GPy." International Journal of Electronics, Communications, and Measurement Engineering 10, no. 1 (January 2021): 33–49. http://dx.doi.org/10.4018/ijecme.2021010103.

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In the era of digital devices, many industries still use traditional methods of pen and paper to maintain records. One such industry is the diesel generator industry where these generators are operated without any proper supervision. The current management of these generator vans is highly unorganized. This causes a lot of miscommunication between the owners and the customers. The idea focuses on monitoring the different parameters of a diesel generator using internet-connected sensors. Parameters such as fuel consumption, AC power ON time, RPM of the turbine, and temperature are measured in real time. The system helps the owners to monitor their generators vans through one mobile application rather than depending on the on-site operators. Both the owners and customers can see how much power was consumed and how their bill was generated. Rather than using pen and paper to maintain records in the current method, the new system completely transforms the old methods into a highly digitalized modern business.
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41

Jamna, Ayadathil, Venkatesan Jamuna, and Rama Reddy Sathy. "Three Phase Matrix Converter for Variable Speed Wind Energy System." Applied Mechanics and Materials 622 (August 2014): 181–90. http://dx.doi.org/10.4028/www.scientific.net/amm.622.181.

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In this paper, a direct ac-ac converter suitable for a variable speed wind energy conversion system is proposed. In wind energy conversion systems, due to the variation in wind speed, there will be variation in shaft speed and hence the frequency of the output will be fluctuating at the generator terminal. A direct ac-ac converter (Matrix converter) is capable of providing simultaneous control of output voltage and frequency at the generator output. In this paper the direct transfer function method is developed, to create a constant voltage and constant frequency output from a variable output voltage and frequency and the same is simulated using MATLAB/SIMULINK simulation software.
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42

Xiao, Lingfei, Robert R. Sattarov, Peisong Liu, and Cong Lin. "Intelligent Fault-Tolerant Control for AC/DC Hybrid Power System of More Electric Aircraft." Aerospace 9, no. 1 (December 22, 2021): 4. http://dx.doi.org/10.3390/aerospace9010004.

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This paper presents a novel intelligent fault-tolerant control method for a kind of more electric aircraft AC/DC hybrid electrical power system, in order to ensure the safe operation of the engine and improve the power supply quality. The more electric aircraft electrical power system was combined with an aircraft engine, two generators, two AC/DC rectifiers, two DC/AC inverters, DC loads, and AC loads. A multi-objective optimization intelligent sliding mode fault-tolerant controller was obtained for aircraft engine with actuator faults. Each of AC/DC rectifiers is 12-pulse autotransformer rectifier unit with active power filter. Active power filter was used to realize the desired performance of DC bus. Intelligent fractional order PI controller is presented for AC/DC rectifier by considering multiple performance indexes. In order to guarantee the AC-side has satisfying voltage, current, and frequency, no matter the sudden change of AC load that happens or DC/AC fault that occurs, the virtual synchronous generator control method was used for DC/AC inverters. Simulation results verify the effective of the proposed more electric aircraft AC/DC hybrid electrical power system.
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43

Solano, Javier, Diego Jimenez, and Adrian Ilinca. "A Modular Simulation Testbed for Energy Management in AC/DC Microgrids." Energies 13, no. 16 (August 5, 2020): 4049. http://dx.doi.org/10.3390/en13164049.

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This paper introduces a modular testbed to simulate AC/DC microgrids. The testbed is implemented in Matlab Simulink and is based on the energetic macroscopic representation (EMR) formalism. It is designed to be a tool to evaluate energy management strategies in AC/DC microgrids. The microgrid simulation model includes a photovoltaic generator, a fuel cell system, ultracapacitors, and batteries on the DC side. It includes voltage source converters (VSC) to couple the DC side with the AC side of the microgrid, which includes a variable AC load and a synchronous generator. Two case studies illustrate the use of the testbed. The model is implemented in Matlab Simulink and made openly available for the scientific community. Using this model, researchers can develop and evaluate energy management strategies in AC/DC microgrids.
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44

Sun, Yu Ping, and Kai Kang. "AC/DC Permanent Magnet Synchronous Generator Design and Research." Advanced Materials Research 694-697 (May 2013): 3076–79. http://dx.doi.org/10.4028/www.scientific.net/amr.694-697.3076.

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This paper has designed and produced an ac/dc permanent magnet synchronous generator which used in ac/dc power system independent. The design of the motor and the basic properties of the motor is discussed in this paper. In order to reduce the voltage regulation of the permanent magnet generator, installation of a soft magnetic material in the generator permanent magnetic pole tail, by increasing the motor load quadrature axis reactance drop improves motor voltage regulation. A prototype is made and test analysis, the generator voltage regulation rate of small, high efficiency, and the simulation result is consistent with the basic design to achieve the requirements.
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45

Rudenko, M. F., Yu V. Shipulina, M. Sh Karimov, and A. M. Rudenko. "INCREASING THE WORKING EFFICIENCY OF SOLAR POWER ABSORPTION REFRIGERATOR UNITS." Herald of Dagestan State Technical University. Technical Sciences 46, no. 4 (January 2, 2020): 32–41. http://dx.doi.org/10.21822/2073-6185-2019-46-4-32-41.

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Objectives.The aim of the study is to develop a cyclic absorption refrigerator unit that implements technology for producing cold from solar radiation energy. Its distinctive feature comprises a highly developed solar receiving unit, consisting of two parallel-connected absorber generators whose reactors are installed in individual heat-insulated “hot box” cabinets.Method. The geometric characteristics of the absorber generator are based on the calculations of the optical and heat energy efficiency of the device models.Results. The physicochemical characteristics of activated carbons (AC) of various production are studied. The absorption capacity of the following working pairs is determined: AC-ammonia, AC-methylamine, AC-ethylamine. The calculated coefficients for the Dubinin-Radushkevich structural equations are obtained. An experimental solar energy refrigerator unit is tested using a working pair of AC-ammonia in an open test area. The operability of the upgraded device is proven. Exergetic coefficient dependencies are determined according to the developed software algorithm based on a simplified thermodynamic cycle. The areas of possible application and use of solar power refrigerator units with the studied working pairs are determined.Conclusion. The increased unit efficiency consists in the optimal layout of all elements of the absorber generator, including the reactor, two flat mirror concentrators, a thermal substrate, a reduced internal air space volume, a double-glazed window made of two sheets of glass and a calculated thickness of heat-insulating Ripor foamed polyurethane.
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Sivasubramaniam, K., X. Huang, D. Ryan, K. Weeber, J. W. Bray, E. T. Laskaris, L. Tomaino, J. M. Fogarty, and S. Ashworth. "AC Losses in a High Temperature Superconducting Generator." IEEE Transactions on Appiled Superconductivity 15, no. 2 (June 2005): 2162–65. http://dx.doi.org/10.1109/tasc.2005.849602.

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47

Ji, Guyuan, and Kazuhiro Ohyama. "Simulation of Variable-Speed Wind Power Generation System using Capacitor-less AC-AC Converter and Switched Reluctance Generator." IEEJ Transactions on Industry Applications 141, no. 2 (February 1, 2021): 185–92. http://dx.doi.org/10.1541/ieejias.141.185.

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48

Handoko, C. R., Mukhtasor, and E. S. Koenhardono. "Performance Evaluation Of Permanent Magnet Synchronous Generator (PMSG) On Tidal Power Generation Optimization." IOP Conference Series: Earth and Environmental Science 1166, no. 1 (May 1, 2023): 012023. http://dx.doi.org/10.1088/1755-1315/1166/1/012023.

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Abstract In a tidal current energy generation system, optimization of power generation can be done through turbine design, system design, and control of mechanical transmission from the turbine to the generator, as well as from the aspect of electronic generator output control. This research aims to analyze the performance of the PMSG generator from a prototype of the tidal current energy power plant. Turbine rotation is simulated using an ac motor equipped with an ac drive that supports separate speed and torque control. The hydraulic transmission system consists of a pump and a hydraulic motor that transfers the rotation of the turbine to the generator, where the power output is observed with variations in turbine speed and torque. The results indicate that the transmission system has worked well in transmitting the turbine’s mechanical power and increasing the rotational speed. The decrease in speed with increasing load and low average efficiency (less than 20%) occurs, mainly due to the characteristics of the generator being tested. The generator has a large rated torque requirement of 32 Nm, which is much higher than the main drive capacity of the turbine simulator. The design of a tidal energy conversion system, in which the tidal current speed fluctuates, requires careful selection of the generator, not only from the aspect of power capacity and rated rotational speed, but also from the initial torque value and required rated torque.
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49

Barrios, Manuel A., Víctor Cárdenas, Jose M. Sandoval, Josep M. Guerrero, and Juan C. Vasquez. "A Cascaded DC-AC-AC Grid-Tied Converter for PV Plants with AC-Link." Electronics 10, no. 4 (February 8, 2021): 409. http://dx.doi.org/10.3390/electronics10040409.

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Cascaded multilevel converters based on medium-frequency (MF) AC-links have been proposed as alternatives to the traditional low-voltage inverter, which uses a bulky low-frequency transformer step-up voltage to medium voltage (MV) levels. In this paper, a three-phase cascaded DC-AC-AC converter with AC-link for medium-voltage applications is proposed. Three stages integrate each DC-AC-AC converter (cell): a MF square voltage generator; a MF transformer with four windings; and an AC-AC converter. Then, k DC-AC-AC converters are cascaded to generate the multilevel topology. This converter’s topological structure avoids the per-phase imbalance; this simplifies the control and reduces the problem only to solve the per-cell unbalance. Two sets of simulations were performed to verify the converter’s operation (off-grid and grid-connected modes). Finally, the papers present two reduced preliminary laboratory prototypes, one validating the cascaded configuration and the other validating the three-phase configuration.
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50

Ramos-Paja, Carlos Andres, Elkin Edilberto Henao-Bravo, and Andres Julian Saavedra-Montes. "MPPT Solution for Commercial Small Wind Generation Systems with Grid Connection." Energies 16, no. 2 (January 7, 2023): 719. http://dx.doi.org/10.3390/en16020719.

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Power generation using small wind turbines connected to AC grids has been gaining attention and contributions in recent years. As small wind turbines are connected to remote areas as support energy systems, there are not extensive contributions connecting those small turbines to AC grids. This paper presents the integration of a small wind generation system which is AC-grid-connected. The system is composed of a 160 W commercial small wind turbine with a permanent magnet synchronous generator and a 140 W Texas Instruments development kit devoted to connecting photovoltaic panels to AC grids. Several experimental tests were developed to characterize the devices, e.g., to obtain the power–current curves of the synchronous generator. Moreover, a mathematical model of the flyback converter is developed in detail in order to design a new converter controller. All the control capacity of the development kit is used to extract the maximum power of the synchronous generator, to reject the oscillation produced by the inverter and to connect the system to the AC grid. Experimental results show that is possible to integrate these devices to provide energy to power systems with some achievable adaptations.
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