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Abstract Topic: Electrical Power Systems Engineering

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Adaptive voltage control for Firefly Algorithm-MPPT output in PV system
Lucky Nindya Palupi (a*), Totok Winarno (a), Agus Pracoyo (a), Lunde Ardhenta (b)

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Corresponding Author
Lucky Nindya Palupi

Institutions
a) Department of Electrical Engineering, State Polytechnic of Malang Soekarno Hatta St. 9 Malang, Indonesia
*lucky.nindya.palupi[at]gmail.com
b) Department of Electrical Engineering, Brawijaya University, MT Haryono St. 167 Malang, Indonesia

Abstract
The development of DC microgrid is increasingly being carried out recently aimed to reduce or even replace energy produced from fossil energy. Many kind of energy sources are used in microgrid systems, but the most commonly used is photovoltaic (PV) to convert sunlight into electricity. PV systems have limitations in their usage time, besides that PV systems also utilize the maximum power point tracking (MPPT) algorithm to maximize power from PV. The use of MPPT in PV systems has a positive impact that can improve power efficiency in partially shaded conditions. MPPT are able to cause unstable voltage problems and exceed the input voltage of the system. In this paper, the performance of adaptive control will be explained using a model reference adaptive controller (MRAC) approach, the control mechanism where the system parameters change dynamically. The reference model is obtained from optimization using MIT rules. Adaptive control will be applied to the buck converter and MPPT controls using the firefly algorithm to be applied to the SEPIC converter. In this study the simulation was carried out and showed Integral of the absolute value of the error (IAE) and integral of the square value of the error (ISE) of the proposed method was smaller than the PID controller. Therefore, the proposed method is able to track the reference voltage smoothly, and have robustness to variations in the parameter interference.

Keywords
Photovoltaic (PV); Buck converter; Firefly Algorithm-MPPT; SEPIC Converter

Topic
Electrical Power Systems Engineering

Link: https://ifory.id/abstract/AG6TMZCFXhnm


Design and Analysis of A Portable Spiral Vortex Hydro Turbine for A Pico Hydro Power Plant
Mohammad Noor Hidayat (a*), Ferdian Ronilaya (a), Irwan Heryanto/Eryk (a), Gatot Joelianto (a)

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Corresponding Author
Mohammad Noor Hidayat

Institutions
a) Department of Electrical Engineering, State Polytechnic of Malang
Jl. Soekarno Hatta No 9, Lowokwaru, Malang, 65141, Indonesia
*moh.noor[at]polinema.ac.id

Abstract
Pico Hydro Power Plant (PHPP)is a hydroelectric power plant with a scale below 5 kW. This technology is suitable to be applied to areas that have many rivers with sloping slopes. The PHPP applied in this research utilized the river flow then flowing the water through a water way with a slope angle around 10 degrees. Due to this sloping angle, it is necessary to modify the turbine intake to produce a more rapid water flow so that the turbine can rotate faster. The modification is made by designing and making a spiral vortex hydro turbine, where the intake is designed to resemble a snail house or a whistle to produce a spiral whirlpool to drive a turbine. Then, the turbine will be coupled with a generator to produce electricity. The results show that the spiral vortex hydro turbine can produce faster turbine rotation, compared with a conventional water intake. The faster the turbine rotation, the higher the generator output voltage. In addition, the device is easy to move and maintain due to its portable design.

Keywords
Pico Hydro Power Plant; hydro turbine; spiral vortex

Topic
Electrical Power Systems Engineering

Link: https://ifory.id/abstract/a2ckCUwZrQEF


Design and Implementation: Portable Floating Pico-Hydro
D Dewatama, M Fauziah, H K Safitri, S Adhisuwignjo

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Corresponding Author
Denda Dewatama

Institutions
Department Electrical Engineering, State Polytechnic of Malang

Abstract
Malang City which is located at an altitude between 440 - 667 meters above sea level, and surrounded by mountains. Thus, the city of Malang has many springs and rivers with high speed flow. At present, river flow energy that used as hydroelectric power is very least. River flow hydroelectric power schemes are often presumed to be less ecologically damaging than large-scale storage hydroelectric power schemes, and then low priced materials, easy to use and easy to care for. Therefore, researchers have design of Portable Floating Pico-Hydro (PFPH). PFPH using a low speed DC generator (500rpm, 18VDC, 15A), controller, DC-DC converter and battery as a load. Voltage output of PFPH is set to have a constant output of 14 volts DC with PI control algorithm. Specifications of PFPH are turbine diameter is 500mm, turbine width is 500mm, overall length is 1200mm and overall width is 1200mm. PFPH tested at a water speed of 1.5 m/s - 4 m/s and generated power 10W-223W.

Keywords
Portable Floating Pico-Hydro, hydroelectric, Design, Implementation

Topic
Electrical Power Systems Engineering

Link: https://ifory.id/abstract/b7QRxPgcN6nF


Design Load controller and Load Shedding Mechanism at DC House Prototype
Muhammad Noor Hidayat (a*), Satria Luthfi Hermawan (b), Ferdian Ronilaya (b)

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Corresponding Author
Satria Luthfi Hermawan

Institutions
State Polytechnic of Malang, Soekarno Hatta Street, Malang, Indonesia

Abstract
Abstract the DC house house project is a pure DC electricity system to enable optimal use of renewable and alternative energy, DC House promotes a more sustainable solution by not using fossil based fuels. DC sources are mainly from renewable generation such as PV and wind turbines, the output from PV and Wind turbine produced is not stable, so there is a need for a regulatory system, arrangements can be made on the generation side and on the load side. Because the output of the generator is not constant, a setting on the load side is needed to adjust the generation capacity. If one of the offsets is to be released, a load shedding must be carried out to meet the load requirements. Release of load is carried out when the supply is reduced because one of the generators is off then the low priority load will be released automatically. In this study simulated DC loads using PID control on the buck converter and load release using switching four loads with priority scale. The DC current sensor is used to determine the amount of current when determining the load released due to limited supply from the source

Keywords
DC House, PID Control, Load Shedding, renewable energy

Topic
Electrical Power Systems Engineering

Link: https://ifory.id/abstract/LBpmTtf3RNY9


Design of Energy Database Management System (DBMS) on Outgoing Transformator 2 at State Polytechnic of Malang
Ika Noer Syamsiana, Awan Setiawan, Masramdhani Saputra

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Corresponding Author
Ika Noer Syamsiana

Institutions
State Polytechnic of Malang

Abstract
Recently, the efficiency of electrical energy is one of wide challenges in the world. The needed energy is very huge, meanwhile the sources of energy are limited. Many researchers try to find solutions for increasing the energy efficiency, one of ways is to monitoring the use of the energy easily so we can reduce of the energy usage. This paper proposes a system for monitoring energy usage by using Internet of Thing. Such system is called as Energy IoT based Database Management System. Every building is supplied by unit 2 transformator which will collect data of the used energy by using smart energy meter. It uses General Package Radio Service (GPRS) for sending the data from every building that is supplied by unit 2 transformator, unit 2 outgoing transformator, and displaying the received data on a web page. The collected data will be used for analysis of power quality and load controlling.

Keywords
DBMS, Energy, GPRS, IoT

Topic
Electrical Power Systems Engineering

Link: https://ifory.id/abstract/tHNJdZLqhR24


Design of SCADA for Load Frequency Control Prototype Using PLC Controller with PID Algorithm
Sigi Syah Wibowo, Ika Noer Syamsiana, Bakti Indra Kurniawan

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Corresponding Author
Ika Noer Syamsiana

Institutions
State Polytechnic of Malang

Abstract
Quality and reliability in electric power systems can be measured by the best value of frequency, voltage, and number of disturbances. One of the problems of the electric power system is the frequency regulation because related to power generated and loading. Changing in load will contribute in changing of frequency then frequency settings are needed by controlling the generator rotation according to load fluctuations using LFC (Load Frequency Control). The Load frequency control prototype made to simulate a system that was almost the same as a power plant in the field but the capacity is lower, several experiments carried out namely open loop, close loop without PID and close loop with PID in load conditions monitored through SCADA. The results of several experiments were carried out and then analysed which were response of the stability of the frequency and speed. PID values obtained from the calculation of the Ziegler Nichols method, Auto Tuning and Try & Error. PID Ziegler Nichols method was used in close loop experiments with a value of Kp = 1 Kd = 0.115 Ki = 0.49. This method was able to improve the frequency of 49.42 Hz at 1 Nm load and 48.41 Hz at 3.5 Nm load. However, other experiments and methods at lower frequency at the same set point of 50 Hz , the transient stability using Ziegler Nichols method has a rise time greater than the other methods of 21.09 ms, the overshoot value in this method is relatively small, 0.492% and settling time 0.03 seconds. Then, the system response is stable before 0.14 seconds even though there is a steady state error of 0.004. Therefore, the load changes affect the stability response of the Ziegler Nichols method is faster than the other methods.

Keywords
Load Frequency Control, PID Ziegler Nichols, SCADA

Topic
Electrical Power Systems Engineering

Link: https://ifory.id/abstract/zBGRkt3fWFHJ


Speed Controller of Wind Turbine Emulator Using Variable Speed Drive Based On PI Method
Muhamad Rifai, Eka Mandayatma, Ratna Ika Putri

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Corresponding Author
Muhamad Rifa-i

Institutions
State Polytechnic of Malang

Abstract
The wind turbine system as a power plant is growing rapidly in line with the electrical energy needs and limitations of fossil energy as a source of electrical energy. Many research has been carried out to develop wind turbine systems and improve system efficiency. Research on wind turbine systems requires wind turbine emulators to simulate the behavior of wind turbines against changes in wind speed. In this paper presents a Design of speed controller based on PI controller for a Wind Turbine Emulator (WTE) using a Variable Speed Drive (VSD). WTE consists of VSD, microcontroller, 3 phase induction motor, Permanent Magnet Synchronous Generator (PMSG) and speed sensor. PMSG speed depends on wind speed. At certain wind speeds, PMSG will rotate at a certain value. Wind turbine emulator will adjust the speed of the induction motor according to a certain wind speed. WTE controls the rotation of a 3 phase induction motor connected to its axis in PMSG. Motor and PMSG rotation speed are measured by rotary encoder sensor as speed sensor. The rotary encoder sensor serves as feedback for WTE. Proportional-integral method is used to control the speed of a 3 phase induction motor through VSD analog input. Based on experiment result, PI controller can adjust speed of induction motor so that PMSG will rotate according to a certain wind speed. Here we observe speed response of WTE to generate voltage of PMSG. WTE controls the speed of induction motor at settling time 9s.

Keywords
Wind Turbine Emulator, Variable Speed Drive, PI Controller

Topic
Electrical Power Systems Engineering

Link: https://ifory.id/abstract/fwmA2Qpq6e8v


STUDY OF COMPARISON OF TAIL WIND TURBINES IN WIND POWER PLANTS
Yulianto, Eka Mandayatma, Bambang Priyadi

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Corresponding Author
Yulianto -

Institutions
Department of Electrical Engineering, Malang State Polytechnic

Abstract
The windmill tail that is widely used is a single tail that has a performance of a large zero offset. This study is to get a windmill tail pattern with a fast response and good direction stability. The aim of this study is to obtain a windmill tail pattern with the most stable direction stability under load conditions and changing wind direction by comparing the stability of several alternative windmill tail patterns. The process of data collection is done by comparing the performance of 3 types of windmills: single tail, semi-differential tail, and differential tail. The variables are speed of wind direction, speed of change of wind direction, differential angle of zero offset error, speed of change of direction, and torque produced. The material obtained from the test results was transcribed and analyzed. The results of the analysis are used to design windmill tail prototypes. From the analysis results show that the swing torque at the differential windmill tail is proportional to the sinusoidal swing angle, the differential angle gives the effect of the torque scale in a cosine manner. Whereas on a single pinwheel produces torque proportional to the sine squared with respect to the swing angle. The differential tail has performance with better speed and stability, but produces vertical vibrations so it is preferable to use a semi-differential pinwheel with a differential angular size tuned in the system.

Keywords
windmill, differential tail, stability, offset error

Topic
Electrical Power Systems Engineering

Link: https://ifory.id/abstract/vNqnZCbRGUd9


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