Transmission expansion planning by using deterministic and stochastic approaches: a case study of Cambodian transmission system | |
| Author | Nimol, Meas |
| Call Number | AIT Thesis no.ET-19-14 |
| Subject(s) | Electric power transmission--Cambodia--Planning Electric power systems--Cambodia |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Energy |
| Publisher | Asian Institute of Technology |
| Abstract | The most critical problem in electrical power system is expansion planning which is practically focused by power utilities in three important areas namely, load forecasting, generation expansion planning (GEP), and transmission expansion planning (TEP). In this thesis, TEP was chosen to study in order to develop the existing system to fulfill demand growth in the future accurately. Main objective is to minimize the total investment cost which is consisting of three terms namely, investment cost of new lines, cost of generation, and loss of load cost. Following this main objective, there are two specific objectives such as: objective number one (1) is to minimize the investment cost of TEP by using deterministic approach and objective number two (2) is to assess the reliability index of TEP by using stochastic approach. In order to solve these two objective functions, different methods and software tool are used namely, DC Load Flow (DCLF) and Particle Swarm Optimization Optimal Power Flow (PSO-OPF), and Monte Carlo Simulation (MCS) for objective number one, and objective number two, respectively. To validate the proposed methods, the Modified Garver 6-bus Test System is used to simulate the proposed model in objective number one, the 5-bus test system is used in objective number two while Cambodia Transmission System is used in all objectives. For the Cambodia Transmission System expansion period, it is considered four paces from base year 2016 to target year 2030 according to power development master plan of Cambodia. The result of proposed method is acceptable comparing with others in the same test system (Garver Test System). The TEP of Cambodia system is considered in three paces 2020, 2025, and 2030 which the baseline year is 2016. The investment cost increases when the number of new installed lines and load demand increase. The generation cost is crucial consideration in TEP. The investment cost per year is less if the project life time is long. Moreover, LOLC is also essential for planning and operation. The LOLC is relevant with the reliability index of the system, so if it is secure and reliable, it means that there is no components failure. This lead to no load curtailment in the system then there is no LOLC. Both of generation cost and LOLC are importance in TEP while the cost of installing new line is less than these two costs. Finally, MCS is used to solve stochastic TEP which focus on LOLC. The output of LOLC is not fix as deterministic TEP, when load increase LOLC does not increases as TEP in 2020. This uses random number probability which any transmission and generator can fail randomly. |
| Year | 2019 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Department of Energy and Climate Change (Former title: Department of Energy, Environment, and Climate Change (DEECC)) |
| Academic Program/FoS | Energy Technology (ET) |
| Chairperson(s) | Singh, Jai Govind; |
| Examination Committee(s) | Weerakorn Ongsakul;Dhakal, Shobhakar; |
| Scholarship Donor(s) | Electricite Du Cambodge (EDC) ;Asian Institute of Technology Fellowship; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2019 |