Abstract
This work covers an improvement upon hydropower supply in Nigeria. The major problem plaguing hydro-plants is the slow turbine rotation of the hydro turbines, which in turn causes unfavorable voltage fluctuations. Fuzzy Logic Control was employed to provide the solution, by using membership functions to analyze and increase slow turbine rotation. A model was employed using fuzzy software tool to control Hydropower Generator speed. Power transmission control was improved with the incorporation of Flexible AC Transmission Systems (FACTS). The type of FACTS controllers employed in this report are those based on voltage sourced converter (VSC), particularly the Static Synchronous Compensator (STATCOM), and also solid state var compensator (SSVC). Data gathered from previous research on the Nigerian 330kv transmission network show that the system is weak with power losses and voltage fluctuations from faulty buses. A MATLAB/Simulink model was employed to observe the results of application of these FACTS devices into the 3330kv National Grid. The results show that the devices greatly improved the voltage stability of the network and improved power loses.
Keywords: Fuzzy Logic Control, Fuzzy Software, FACTS, STATCOM, MATLAB/SIMULINK, Voltage Stability
Author: :Tikili Wisdom Yenimi
Supervising Lecturer: Dr. Shadrack, M. U
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INCORPORATING ARTIFICIAL INTELLIGENCE AND POWER ELECTRONIC DEVICES TO REVITALIZE THE NIGERIAN
This is a novel approach to the control of hydropower generator speed
Apart from the use of Fuzzy Software tool to control hydropower generator speed, what other methods can be used?
Hello Adeleke Wasiu, thank you for your question. A simple PID controller can be used can be used to send signals for turbine generator speed control.
Ideally, a speed governor is used to control the speed and output power of a hydro power plant. The essence of the paper is the use of fuzzy inference system to identify faults in turbine operation and send appropriate signal to the governor to take significant action.
Hello Adeleke Wasiu, thank you for your question. A simple feedback PID controller can be used for hydropower generator control.
Hello Adeleke Wasiu, thank you for your question. A simple feedback PID controller can be used for hydro turbine generator control.
Interesting paper. But what is the advantage of using Fuzzy Software controller to other controllers.
Nice work Wisdom, I never knew you could write a technical paper.
I never did either, lol. I had to teach myself. I try my best.
So what inspired the idea of using Fuzzy Logic
I actually first heard of the idea of fuzzy logic from video games. I have seen it being used in design and implementation of game AI
Nengi, in games for example, when coding a command for the AI, a sample code might be in the form
IF Wizard.Health() <= 0 THEN Wizard.isDead()
Code like this will either fire or not, depending on if the antecedent is valid. But fuzzy logic code might resemble something like this
IF Target_isFarRight THEN Turn_QuicklyToRight
For fuzzy systems, the consequent fires to a matter of degree.
For the fuzzy Inference system of a game, the degree of membership of the antecedent defines the degree to which the consequent fires.
And also why did you use it for the control
A decent paper Wisdom. Short and innovative. But I have a question. Can fuzzy Logic be applied to other power generation systems
Thank you for your question Claire. In theory, yes it can be applied to other power generation systems. There are other controllers that are in use in power grid networks and various power plants, but the advantage of Fuzzy Logic is that is an AI controller whose efficiency depends on the expertise of the user.
Excellent work lad. But I noticed your paper also included application if FACTS Controllers to improve the national grid performance, but you didn’t highlight very much on it.
Good evening Mr. Simon, and thank you for your reply. Yes a very intelligent observation. FACTS technologies are a promising technology in power transmission based on power electronics. They help to increase the capability of current transmission lines, as well as improving the stability. They do this through high speed electronics control of ac transmission line parameters. The reason I didn’t emphasize much on this is it has already been covered and explained to great detail by different researchers.
Okay. From you explanation, you said that the FACTS Controllers help in the electronic control of transmission lines by control of transmission line parameters. What are these transmission line parameters?
Good morning sir. These parameters that guide the operation of transmission systems include series impedance, shunt impedance, current, voltage, and phase angle. They are very important because they govern the operation of the whole transmission system.
Good Paper. And from your interaction with Simon Festus, I want to ask, how can these FACTS Controllers be properly applied and implemented so that there will be steady light in Nigeria?
You made good point on how the energy crisis in Nigeria can be improved. But I want to ask, what is the main cause of epileptic power supply in Nigeria?
Thank you Pere for your question. There are various causes of poor power supply in Nigeria, but in the context of this paper, it is attributed to slow rotation of hydro turbine, which was improved with fuzzy logic control.
1. Is the Fuzzy Logic generating constant power? How? or analyzing the causes of not constant power? How?
2. How is the Fuzzy logic applied to solve the problem of low speed rotation of turbines, in the case of low water in the dams?
TIKILI WISDOM YENIMI
1. How can control Hydropower Generator speed. Power transmission control was improved with the incorporation of Flexible AC Transmission Systems (FACTS)
2. Give at least 3 examples of how Artificial Intelligence and power electronics device can be used to Artificial Intelligence and Power Electronic Devices To Revitalize The Nigerian Power Sector
1. Nigeria as a whole has suffered an untold epileptic power supply for many years, nevertheless, to solving this perennial challenge requires a research problem statement that clearly establishes the extent of the problem and to be able to measure the success of the developed solution. This is clearly lacking in this article. How were you able to evolve a solution without establishing a technical problem?.
2. What type of metric is used to measure the performance of the developed solution?.
3. How does fuzzy Logic generate constant power, explain in clear terms.