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This episode has been introduced with a project entitled ”Design, supply, installation and testing commissioning of 2.1MW solar carport” which wsa executed in Cochin International Airport in Kerala, India. I worked in this project for the Sterling And Wilson Private Limited as an Electrical and Electronics Engineer. I performed the work under the administration and management of project manager Mr M. Mohan form from 2nd February 2018 to 17th.
Sterling & Wilson was established in the year 1927 with the name of Wilson Electric works and further named as Sterling & Wilson in the year 1971.
This organization has been introduced itself as a qualified and trusted solution provider in the energy space and infrastructure. This company deals with transmission and distribution, diesel generators and renewables such as wind battery, solar etc. It has many dedicated engineers which provided services of operation and maintenance to the client. Due to its global operation service and expansion of its range of service, the company has turned over into positive growth trend.
4.9 (984)
“ Ok, let me say I’m extremely satisfy with the result while it was a last minute thing. I really enjoy the effort put in. ”
Its turnover is about 10000 crore at the end of March 2018. This company is operated in 25 countries such as Middle East, America, Europe, and Australia. Today the S&W is the leading multinational EPC Company.
The primary objective of this project is to design, supply, install and perform the commissioning test of 2.4 MW of solar carport in Cochin International Airport which is the first airport in the world which is fully operated by solar power located at Kerala, India. The secondary objective of this project is mentioned below:
I did this project by collaborating with the project members and other staffs who have direct involvement in this project. I worked on the design, supply, installation as well as the performed the commissioning test of the 2.4 MW solar carport. I performed the design of the general arrangement of the solar carport. I connected the 19 modules in series in order to form the string and also designed the inverter within 60 kW AC power and 80KW DC power for the conversion of power produced by the solar modules. Besides this, I also performed the calculation for the voltage drop.
During this project, I was positioned as an electrical and electronics engineer which is shown in the following organization chart.
Organization hierarchy:
The following are the various different technical roles and responsibilities performed during this project.
Initially, I was provided with a document by the project manager and suggested me to go through it. I studied it well and then went through deep study regarding the design and installation of the solar carport through an extensive literature review on the internet. I understood the techniques and methods for the implementation and design. I learned the various elements related to it such as power, voltage drop, solar module etc. I studied the theory of different elements and understood their features and process of operation. The collected information was then discussed with the project manager. I gave a presentation on the overall methodology of the project. After my presentation, I got appreciated by the members and gave me the approval to proceed further. I selected my team members went for the survey of the site and after proper survey, I started my work.
Next, I performed the design for the general arrangement of the solar carport in the existing place in order to generate the electricity which has the capacity of about approximately 2.4 MW for the carport. After the proper survey of the existing place and availability of the place, I decided to fix the polycrystalline type of the solar modules. I used this solar module to produce the power which has the capacity of producing the 330WP form each of the module. I also ensured the electricity to be produced during the project design.
After the design of the general arrangement of the solar carport, I went for the connection of the modules. For the connection of the solar module, I wired all the solar panel in the series in order to form the string. I used series circuit because the voltage was additive and the amperage remained the same. I connected 19 different modules where I coupled the positive and negative terminal of the different solar panel to form a string and proceeded the remaining using a similar method. I connected a maximum 12 numbers and minimum 10 numbers of the strings in the parallel where I connected all the positive terminal of the solar panel together and all the negative terminals of the panel together.
Next, I selected the string inverter which has the capacity to provide an alternating current of 60KW and the direct current of 80 KW. I choose the inverter in order to convert the DC power obtained from the solar energy to the alternating current. For this case, I used an inverter of model number GW60K-MT Goodwe having four Maximum Power Point Tracker. I connected the terminals of the solar panel to the inverter. I used the battery to store the charge as the DC power and later it was used as the alternating current with the help of the inverter.
Next, I implemented the overall design, where I used DC cable for connecting the strings by considering the proper size on the basis of the voltage drop calculation. The voltage drop calculation was done to limit the voltage drop by at least 1.5 %. I used the DC cables which were the multi-stranded annealed high conductivity copper cables. I performed the calculation of the voltage drop which was calculated by the rated current of the module resistance of operating condition of 60 degree Celsius by average cable route length. I also calculated the percentages of voltage drop by dividing the voltage drop with a rated voltage of the string.
Next, I prepared the cable scheduling and tested the entire system if it was working or not. I prepared the cable scheduling according to the condition of the site. It means the DC inverter cable schedule was based on the positioning of each inverter and the AC cable schedule was based on the position of the compact schedule. After completing the overall work, I tested the entire system and whenever the error was monitored, I performed the commissioning of the system to eliminate the problem. At the last stage, I found the project to be operable. The output of the DC was found to be 2.4MW.
When dealing with the project, I considered safety measures as the main and essential factor before performing any project whether inside or outside the company. Since DC current is most dangerous therefore I understood it properly before proceeding the project. I understood the safety precaution of handling the electricity, components as well as dealing with the AC and DC current. I learned the first aid to be given to the injured person as well as the energy treatment during any critical accident. I trained all workers who were involved in this project and made sure that they applied and followed the necessary measures for the project development.
At the time of design and installation, I found some of the problems which were not critical but somewhat delaying the project work. To avoid such type of problems, I reported and took some permission from the project manager and applied them accordingly. The following are the various technical problems faced during the project.
The distance between the inverter position and CSS was found to be greater. This created a problem during the termination because the inverter used did not consist of greater space for the cable termination. To eliminate this problem, I reported this problem to the project manager and discussed it. I gave my ideas to put an adopter box and project manager got appreciated with my ideas. Therefore as per the manager’s permission, I put an adopter box which includes the provision of ON/OFF. I connected the cable from the inverter to the adopter box and then adopter box to CSS.
For the power evacuation from the string inverters during the design of the solar carport, I used compact substation which consisted of a transformer of capacity 500KVA. I connected the inverters to the compact substation by using the appropriate size of the AC cables on the basis of the voltage drop calculation to limit the voltage drop by 1%.
As this project is operated in the site area so I had to deal with various people including staffs of the site as well as the company. I understood about the project at the beginning of the project where I consulted with the staffs of the company as well as the seniors and project manager. I took their proper advice during every meeting for the further improvement of the project. I sincerely completed all the task by collaborating with the client and proper coordination with the project members. I attended a group meeting in the site and trained the labour on installation and commissioning. During every meeting, I behave politely with the labour and supported them in the time of need. I also attended a meeting with the project manager and updated my work timely to him for the smooth work progress.
The standards and codes such as ISO/TC 180 for the solar energy, ICS 29.050 for various conducting and non-conducting materials, ICS 29.060 for the electrical wires and cables, ICS 29.180 for transformers, and also other standards of electrical engineering such as for inverters, electronics components etc. were followed during the project. Further, I also worked under the policies and standards of S&W private limited.
I successfully designed and tested the entire system of solar carport through numerous task performance. I fulfilled all the requirement of the project and provide a very well established solar carport. I succeeded in fulfilling the objective of this project. I submitted my project report that was prepared in the Microsoft word along with the labour records with payments prepared on Excel to the client and also to the company as the reference. By developing the solar carport, I was able to use the existing area instead of the new area. This helped to manage the space and hence maximize the efficiency and comfort of the customers, visitors, and employees. I also prevented the vehicle from overheating and also from the rain and snow.
From this project, I gained and developed a lot of information and knowledge regarding solar devices and its functioning. I developed my knowledge to handle and design of the inverter and the various procedure of converting energy from DC to AC. Besides this, I improved my personal development as I was able to lead the team and proved myself a good leader. I managed most of the task and deal with various person to explain the progress work. This helped me enhancing my capabilities of dealing with different people and various way of communication behaviour.
Design and Implementation of a 2.1MW Solar Carport at Cochin International Airport. (2024, Feb 19). Retrieved from https://studymoose.com/document/design-and-implementation-of-a-2-1mw-solar-carport-at-cochin-international-airport
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