Renewable & Sustainable Energy (Slides)
K. Liu, L. Guo, S. Khawar Hussian Shah
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Panel
12 Sep 2022
This panel session contains the following presentations:
1. Image Enhancement Algorithm for the Nondestructive Inspection of Energy Storage Batteries
The energy storage industry has ushered in a period of rapid development, and the emphasis on energy storage safety is also increasing. It is of great significance to non-invasively detect the state of energy storage batteries, that is, to analyze the battery using images. The clarity and precision of the image are the keys to study the internal structure of the energy storage battery. In order to achieve better image processing effect, an improved image enhancement algorithm based on fuzzy sets, histogram and contrast-limited adaptive histogram equalization (CLAHE) was raised. The algorithm proposes a comprehensive solution to the problems of rapidly acquired x-ray cell images, taking the problems of noise, contrast and local details into account. In addition to the basic function of removing noise, this algorithm can not only achieve low-contrast X-ray image correction, but also achieve image detail enhancement, which can significantly improve the signal to noise ratio (SNR) of X-ray. The proposed method is analyzed and it is shown that after the utilization of the algorithm, the X-ray image have a better gray distribution, and the SNR of the dark area image improved.
2. Research on the Adaptability Test of New Energy Units Accessed the Dual-High Power System
With the rapid development of new energy power generation and DC transmission technology in the power grid, the power grid has formed a development trend towards a dual-high power system with a high proportion of renewable energy and a high proportion of power electronic equipment in China. In a dual-high power system, the steady-state and transient characteristics of the new energy generator set are more complex after it is connected to the grid and coupled to the system. Whether the new energy generators of different types can output normally according to the set value and maintain stable operation in the system when they are connected to the power grid, especially the power grid with weaker system strength has become an urgent problem to be studied.In this paper, an adaptability test scheme for new energy units connected to the network points of different system strengths is proposed.Based on the multiple renewable energy station short-circuit ratio (MRSCR), test of the steady-state operation characteristics and fault ride-through characteristics can be done after new energy units are connected to the power system such as photovoltaic power generation, direct-drive wind generation, and doubly-fed wind generation. According to the conclusions obtained by each new energy unit in the test grid and the test scheme, each new energy unit can be configured in a reasonable position according to the adaptability in the system, so as to provide a theoretical basis for connecting new energy units in the actual system and the system can maintain safe and stable operation after the new energy unit is connected.
3. Review and Prospect of Clean Energy Reliability Research
Clean energy power generation is environment-friendly and the technology is becoming more and more mature, which is the inevitable direction of energy development in the future. With the increase of clean energy penetration, a large number of clean energy connected to the power grid will greatly change the original power flow distribution of the system and bring a huge impact on the reliability level of the whole system. Reevaluate the reliability of the system according to the characteristics of various clean energy power generations, and study new strategies to improve the reliability to improve the consumption level, so as to put forward new requirements for the future power grid planning. This paper expounds the output power modeling of various types of clean energy and their combinations, and the system reliability evaluation and prediction methods after clean energy access. Finally, the development direction of clean energy in the future is prospected.
4. Impact of Wind Speed on Total Harmonic Distortion in a Hybrid Renewable Energy System
Electrical power generation through Photovoltaic Modules and Wind turbines is an inexhaustible alternative to power generation. Renewable Energy Sources are considered clean energy sources, causing less carbon footprint. They are environmentally friendly, but they still need much research to develop technologies that guarantee uniformity in produced power. Since the wind turbine uses wind power to produce electrical power, the produced power is dependent on wind speed, density, and other important variables. The changes in these variables can inject power quality disturbances in the grid. The increased reliance on renewable energy sources is adding to power quality problems. The power industry has started to utilise two or more renewable energy sources to enhance the power entering an electrical grid. This type of power system is known as Hybrid Renewable Energy Systems (HRES). The research paper will look at how Total Harmonic Distortion (THD) is impacted by changes in the power produced by wind turbines. The variance in power produced can be caused by the change in wind speed at a specific location. The research will use MATLAB to simulate a Hybrid Renewable Energy System using a solar system and wind turbine. The simulation results will be analysed, and the results will be presented.
1. Image Enhancement Algorithm for the Nondestructive Inspection of Energy Storage Batteries
The energy storage industry has ushered in a period of rapid development, and the emphasis on energy storage safety is also increasing. It is of great significance to non-invasively detect the state of energy storage batteries, that is, to analyze the battery using images. The clarity and precision of the image are the keys to study the internal structure of the energy storage battery. In order to achieve better image processing effect, an improved image enhancement algorithm based on fuzzy sets, histogram and contrast-limited adaptive histogram equalization (CLAHE) was raised. The algorithm proposes a comprehensive solution to the problems of rapidly acquired x-ray cell images, taking the problems of noise, contrast and local details into account. In addition to the basic function of removing noise, this algorithm can not only achieve low-contrast X-ray image correction, but also achieve image detail enhancement, which can significantly improve the signal to noise ratio (SNR) of X-ray. The proposed method is analyzed and it is shown that after the utilization of the algorithm, the X-ray image have a better gray distribution, and the SNR of the dark area image improved.
2. Research on the Adaptability Test of New Energy Units Accessed the Dual-High Power System
With the rapid development of new energy power generation and DC transmission technology in the power grid, the power grid has formed a development trend towards a dual-high power system with a high proportion of renewable energy and a high proportion of power electronic equipment in China. In a dual-high power system, the steady-state and transient characteristics of the new energy generator set are more complex after it is connected to the grid and coupled to the system. Whether the new energy generators of different types can output normally according to the set value and maintain stable operation in the system when they are connected to the power grid, especially the power grid with weaker system strength has become an urgent problem to be studied.In this paper, an adaptability test scheme for new energy units connected to the network points of different system strengths is proposed.Based on the multiple renewable energy station short-circuit ratio (MRSCR), test of the steady-state operation characteristics and fault ride-through characteristics can be done after new energy units are connected to the power system such as photovoltaic power generation, direct-drive wind generation, and doubly-fed wind generation. According to the conclusions obtained by each new energy unit in the test grid and the test scheme, each new energy unit can be configured in a reasonable position according to the adaptability in the system, so as to provide a theoretical basis for connecting new energy units in the actual system and the system can maintain safe and stable operation after the new energy unit is connected.
3. Review and Prospect of Clean Energy Reliability Research
Clean energy power generation is environment-friendly and the technology is becoming more and more mature, which is the inevitable direction of energy development in the future. With the increase of clean energy penetration, a large number of clean energy connected to the power grid will greatly change the original power flow distribution of the system and bring a huge impact on the reliability level of the whole system. Reevaluate the reliability of the system according to the characteristics of various clean energy power generations, and study new strategies to improve the reliability to improve the consumption level, so as to put forward new requirements for the future power grid planning. This paper expounds the output power modeling of various types of clean energy and their combinations, and the system reliability evaluation and prediction methods after clean energy access. Finally, the development direction of clean energy in the future is prospected.
4. Impact of Wind Speed on Total Harmonic Distortion in a Hybrid Renewable Energy System
Electrical power generation through Photovoltaic Modules and Wind turbines is an inexhaustible alternative to power generation. Renewable Energy Sources are considered clean energy sources, causing less carbon footprint. They are environmentally friendly, but they still need much research to develop technologies that guarantee uniformity in produced power. Since the wind turbine uses wind power to produce electrical power, the produced power is dependent on wind speed, density, and other important variables. The changes in these variables can inject power quality disturbances in the grid. The increased reliance on renewable energy sources is adding to power quality problems. The power industry has started to utilise two or more renewable energy sources to enhance the power entering an electrical grid. This type of power system is known as Hybrid Renewable Energy Systems (HRES). The research paper will look at how Total Harmonic Distortion (THD) is impacted by changes in the power produced by wind turbines. The variance in power produced can be caused by the change in wind speed at a specific location. The research will use MATLAB to simulate a Hybrid Renewable Energy System using a solar system and wind turbine. The simulation results will be analysed, and the results will be presented.
Chairs:
Dr Shaaban
