scholarly journals Kontrol Tegangan Self-Excited Induction Generator dengan Electronic Load Controller Terkontrol PID-GA

2020 ◽  
Vol 10 (1) ◽  
pp. 41
Author(s):  
Ermanu Azizul Hakim ◽  
Rahayu Pandunengsih ◽  
Diding Suhardi ◽  
Novendra Setyawan
Keyword(s):  
Pid Control ◽  
Alternative Energy ◽  
Reactive Power ◽  
Capacitor Bank ◽  
Voltage Regulation ◽  
Induction Generator ◽  
Electronic Load ◽  
The Stability ◽  
Generator Terminal ◽  
Stable Voltage

Induction generator operation requires reactive power with external contactor. One of induction generator types, SEIG reactive power supplied by capacitor bank connected to generator terminal. SEIG is alternative energy conversion in small area or rural, SEIG has the main disadvantage of poor voltage regulation under various load conditions. ELC combine PID control which is optimized using Genetic Algorithm in order to maintain the stability of the voltage when the load varies. The result shows the SEIG system using ELC with PID-GA control worked to stable voltage in accordance with the standard with voltage tolerance of 10% when load change. The addition of GA to determine the value of the PID parameter where response system better with difference overshoot value start is 70.48%, when decrease load in 5 second by 44.3% and in the 10 second when increase load of 2 kW is 5.96% compared system with PID control without GA optimization.

Genetic algorithm–based calculation of the excitation capacitance of a self-excited induction generator for stable voltage operation over load and speed variations

2017 ◽  
Vol 41 (6) ◽  
pp. 421-430 ◽  
Author(s):  
Ahmed Tahir ◽  
Zakariya Rajab ◽  
Ahmed Hammoda ◽  
Sara Greibea ◽  
Loubna Alakeili ◽  
...  
Keyword(s):  
Genetic Algorithms ◽  
Reactive Power ◽  
Capacitor Bank ◽  
Induction Generator ◽  
Power Demand ◽  
Linear Region ◽  
Saturation Region ◽  
Three Phase ◽  
Stable Voltage ◽  
Good Agreement

In order to provide the reactive power demand of a self-excited induction generator which is required to achieve a voltage build-up, a three-phase capacitor bank is connected between the generator terminals. As loading increases, the operating point on the magnetizing curve moves toward the linear region which may lead to the collapse of the generated voltage. In this article, genetic algorithms are used to evaluate the value of the excitation capacitance that makes the machine operate in the saturation region which ensures a stable generated voltage. To verify the effectiveness of this method, a laboratory machine which has a relatively high stator and rotor resistances and leakage reactance is considered. The values of the excitation capacitances predicted by the genetic algorithms are applied to the machine Simulink-based model. The results obtained by the simulation are compared with experimental results which show a good agreement.

Identification of the best topology of delta configured three phase induction generator for distributed generation through experimental investigations

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Vanka Bala Murali Krishna ◽  
Sandeep Vuddanti
Keyword(s):  
Distributed Generation ◽  
Reactive Power ◽  
Voltage Regulation ◽  
Reactive Power Compensation ◽  
Induction Generator ◽  
Experimental Investigations ◽  
Small Scale ◽  
Empirical Formulas ◽  
Simple Method ◽  
Main Challenge

Abstract Research on Self –excited induction generator (SEIG) brings a lot of attentions in the last three decades as a promising solution in distributed generation systems with low cost investment. There are two important fixations to attend in the operation of SEIG based systems, a) excitation and b) voltage regulation. Many procedures are reported regarding selection of excitation capacitance in the literature, based on state-state analysis, dynamic modeling, empirical formulas and machine parameters which involve various levels of complexity in findings. Moreover, the voltage regulation is the main challenge in implementation of SEIG based isolated systems. To address this problem, many power electronic-based schemes are proposed in the literature and but these solutions have few demerits importantly that additional cost of equipment and troubles due to failure of protection schemes. In particular, the installation of SEIG takes place at small scale in kW range in remote/rural communities which should not face such shortcomings. Further in case of off-grid systems, the maximum loading is fixed based on connected rating of the generator. This paper presents the various methods to find excitation capacitance and illustrates an experimental investigation on different possible reactive power compensation methods of delta connected SEIG and aimed to identify a simple method for terminal voltage control without power electronics. In this experimental work, the prime-mover of the generator is a constant speed turbine, which is the emulation of a micro/pico hydro turbine. From the results, it is found that a simple delta connected excitation and delta configured reactive power compensation limits voltage regulation within ±6% while maintaining the frequency of ±1%, which make feasible of the operation successfully in remote electrification systems.

STATCOM Based Solid State Voltage Regulation for Isolated Self-Excited Induction Generator

2016 ◽  
pp. 147-183
Author(s):  
Pallavi Thakkur ◽  
Smita Shandilya
Keyword(s):  
Solid State ◽  
Reactive Power ◽  
Low Cost ◽  
Voltage Regulation ◽  
Induction Generator ◽  
Terminal Voltage ◽  
Resistive Loads ◽  
Static Compensator ◽  
Self Protection ◽  
Generating System

Self-Excited Induction Generator (SEIG) offers many advantages such as low cost, simplicity, robust construction, self-protection against faults and maintenance free in today's renewable energy industry. However, the SEIG demands an external supply of reactive power to maintain the constant terminal voltage under the varying loading conditions, which limits the application of SEIG as a standalone power generator. The regulation of speed and voltage does not result in a satisfactory improvement although several studies have been emphasized on this topic in the past. To improve the performance of the SEIG system in isolated areas and to regulate the terminal voltage STATic COMpensator (STATCOM) has been modelled and developed in this dissertation. The STATCOM consists of AC inductors, a DC bus capacitor and solid-state self-commutating devices. The ratings of these components are quite important for designing and controlling of STATCOM to maintain the constant terminal voltage. The proposed generating system is modelled and simulated in MATLAB along with Simulink and sim power system block set toolboxes. The simulated results are presented to demonstrate the capability of an isolated power generating system for feeding three-phase resistive loads.

scholarly journals Equivalent Sliding Mode Controller for Stability of DC Microgrid

2021 ◽  
Vol 12 (1) ◽  
pp. 23
Author(s):  
Muhammad Rashad ◽  
Uzair Raoof ◽  
Nazam Siddique ◽  
Bilal Ashfaq Ahmed
Keyword(s):  
Reactive Power ◽  
Sliding Mode ◽  
Voltage Regulation ◽  
Pi Controller ◽  
Operating Conditions ◽  
Dc Microgrid ◽  
Dc Microgrids ◽  
Central Controller ◽  
The Stability ◽  
Decentralized Architecture

DC microgrids are gaining popularity due to their lack of reactive power compensation, frequency synchronization, and skin effect problems. However, DC microgrids are not exempted from stability issues. The stability of DC microgrids based on decentralized architecture is presented in this paper. Centralized architecture can degrade system performance and reliability due to the failure of a single central controller. Droop with proportional integral (PI) controller based on decentralized architecture is being used for DC microgrid stability. However, droop control requires a tradeoff between voltage regulation and droop gain. Further, global stability through PI controller cannot be verified and controller parameters cannot be optimized with different operating conditions. To address limitations, an equivalent sliding mode (SM) controller is proposed for a DC microgrid system in this paper. Detailed simulations are carried out, and results are presented, which show the effectiveness of an equivalent SM controller.

Experimental Voltage Stabilization of a Variable Speed Wind Turbine Driving Synchronous Generator using STATCOM based on Genetic Algorithm

2016 ◽  
Vol 17 (5) ◽  
pp. 541-546 ◽  
Author(s):  
Helmy M. El-Zoghby ◽  
Ahmed F. Bendary
Keyword(s):  
Genetic Algorithm ◽  
Power System ◽  
Wind Turbine ◽  
Reactive Power ◽  
Power Grid ◽  
Synchronous Generator ◽  
Voltage Regulation ◽  
Operating Conditions ◽  
Static Synchronous Compensator ◽  
The Stability

Abstract In this paper Static Synchronous Compensator (STATCOM) is used for improving the performance of the power grid with wind turbine that drives synchronous generator. The main feature of the STATCOM is that it has the ability to absorb or inject rapidly reactive power to grid. Therefore the voltage regulation of the power grid with STATCOM device is achieved. STATCOM also improves the stability of the power system after occurring severe disturbance such as faults, or suddenly step change in wind speed. The proposed STATCOM controller is a Proportional-Integral (PI) controller tuned by Genetic Algorithm (GA). An experimental model was built in Helwan University to the proposed system. The system is tested at different operating conditions. The experimental results prove the effectiveness of the proposed STATCOM controller in damping the power system oscillations and restoring the power system voltage and stability.

scholarly journals Analisis Pengaruh Pengaturan Sudut Penyalaan Thyristor Pada Tegangan Eksitasi Terhadap Keluaran Daya Reaktif Generator di PT.PJB PLTU Gresik Unit 3

2021 ◽  
Vol 8 (3) ◽  
pp. 53-58
Author(s):  
Rachmat Sutjipto ◽  
Ika Noer Syamsiana ◽  
Widya Pratiwi
Keyword(s):  
Reactive Power ◽  
Interconnection Network ◽  
Mechanical Energy ◽  
Synchronous Generator ◽  
Electrical Energy ◽  
Voltage Regulation ◽  
Excitation System ◽  
Power Limit ◽  
The Stability ◽  
Generator Output

The process of changing mechanical energy into electrical energy is carried out by a synchronous generator using an excitation system that functions to supply a DC source to the generator field winding. In this study, the excitation system used is a static excitation system that uses a transformer and several thyristors connected in a bridge configuration. The excitation system is then implemented on a generator with a capacity of 200 MVA / 15 kV using the MATLAB Simulink R2017b simulation. By using the above circuit, the thyristor ignition angle setting can be adjusted so that it can adjust the excitation voltage and obtain the appropriate excitation current to maintain the stability of the generator output voltage. The simulation was carried out with variations in generator load and using 2 different types of excitation settings. The first setting is to set the thyristor ignition angle to 30° with t=10 ms, at this setting the generator can maintain a stable V out value with a voltage regulation limit of ±5% and the reactive power that can be generated by the generator is +50 MVAr and - 40 MVAr. When given a constant excitation at an angle of 35° with t=1 ms, the value of Vout exceeds the expected regulatory limit and the resulting reactive power limit is between +60 MVAr and -100 MVAR where the reactive power does not match the load requirements. This can have an impact on the interconnection system, namely when the reactive power of the generator is greater than the load requirement, the generator with a smaller reactive power will absorb reactive power in the interconnection system and can disrupt the stability of the interconnection network.

scholarly journals Sensorless Speed and Reactive Power Control of a Double-Feed Induction Generator using Adaptive Observer in Wind Turbine Power Plant

2018 ◽  
Vol 3 (2) ◽  
pp. 54-64
Author(s):  
NOUREDDINE BOUMALHA ◽  
DJILLALI KOUCHIH ◽  
MOHAMED SEGHIR BOUCHERIT
Keyword(s):  
Power Control ◽  
Wind Turbine ◽  
Reactive Power ◽  
Lyapunov Theory ◽  
Adaptive Observer ◽  
Induction Generator ◽  
Reactive Power Control ◽  
Wind Turbine System ◽  
Doubly Fed ◽  
The Stability

This work presents a new method for the synthesis of a sensorless speed and reactive power control applied to a wind turbine system based to a Doubly Fed Induction Generator (DFIG). The proposed method based on adaptive observers: The rotor speed is adapted using adaptation mechanisms. Stability analysis based on Lyapunov theory is used to guarantee the stability of the observer. To verify the consistency of the proposed approach. We will be interested in the study of vector control based on the synthesis of classical controllers. Simulation results provided with the MATLAB/SIMULINK environment show the consistency of the proposed approaches.

Strategies for Protection Systems of Wind Turbines With Doubly Fed Induction Generator

2019 ◽  
pp. 267-288
Author(s):  
Dmitry Ilyin ◽  
Tatiana Shestopalova ◽  
Alexey Vaskov ◽  
Aung Ko
Keyword(s):  
Power Systems ◽  
Wind Turbines ◽  
Reactive Power ◽  
Renewable Energy Sources ◽  
Voltage Regulation ◽  
Power Converter ◽  
Induction Generator ◽  
Doubly Fed Induction Generator ◽  
Protection Systems ◽  
Doubly Fed

Doubly fed induction generator (DFIG) is a widely spread technology in modern wind turbines (WT) due to its capability to operate with variable speed, partial scale power converter, and ability to control active and reactive power independently. The main drawback of DFIG is its complicated protection systems. In the chapter, several strategies for DFIG protection are reviewed, and the authors provide a conclusion about their advantages. Penetration of renewable energy sources (in particular, wind power) have a huge impact on power systems; thus, wind turbines should be considered as conventional generation units in terms of frequency and voltage regulation. Modern grid codes require WT stay connected during grid fault and be capable to provide appropriate grid support. Therefore, it is important to implement a DFIG protection system that could meet grid code requirements.

Voltage Control of Single-Phase Two Winding Self Excited Induction Generator Using SVC-MERS for Isolated System

2016 ◽  
Vol 7 (3) ◽  
pp. 901
Author(s):  
Fransisco Danang Wijaya ◽  
Hartanto Prabowo
Keyword(s):  
Single Phase ◽  
Reactive Power ◽  
Voltage Regulation ◽  
Induction Generator ◽  
Prime Mover ◽  
Small Power ◽  
Load Variations ◽  
Three Phase ◽  
Generator Voltage ◽  
Effective Cost

Single-phase induction generator is very suitable to be used in the typical loads which only need a single-phase power supply with small power capacity requirement, such as diesel engine, picohydro or small wind plant. It has some advantages such as rugged, effective cost, maintenance free and require no external excitation. However, it has inductive characteristic which makes poor voltage regulation. This paper proposed a shunt reactive compensator called SVC-MERS which can provide a variable reactive power to maintain the generator voltage despite of load variations. The experiment was conducted on single-phase two winding induction generator coupled by a three-phase induction motor which serves as the prime mover. SVC-MERS and the load are connected in shunt to the main winding, while the excitation capacitor was connected to the auxiliary winding. The experimental results showed that SVC-MERS can improve voltage regulation and substantially enhanced steady state loading limit.

scholarly journals Simplified Approach for the Analysis of Three-Phase Self-Excited Induction Generator

10.29007/cddt ◽  
2018 ◽  
Author(s):  
Nidhish Mishra ◽  
Abdulsalam Shaikh
Keyword(s):  
Reactive Power ◽  
Practical Importance ◽  
Voltage Regulation ◽  
Operational Performance ◽  
Induction Generator ◽  
Simplified Approach ◽  
Three Phase

This paper presents a simplified approach to analyse the operational performance of a three phase Self-Excited Induction Generator (Cage type) under varying magnetizing component. SEIG are widely used in wind- mills due to many advantages, such as robustness, mechanical simplicity and low price but suffers from poor voltage regulation. However, the need of external capacitance to provide required reactive power is a major limitation particularly in standalone mode [1, 2] Therefore, it is necessary to study the effect of capacitance very precisely for practical importance. The proposed method is experimentally tested for a 3.7 kW induction generator.

Sign in / Sign up

Export Citation Format

Share Document