A Study on Fault Analysis at Proposed HVDC Transmission System between Central and Western Regions in the Kingdom of Saudi Arabia

With the continuous growth of electrical demand, power grid construction accommodates the required load to be connected and integrated into the existing electrical grid. Many AC power transmission and DC transmission lines are constructed to meet large capacities worldwide. Traditionally High Voltage Alternating Current (HVAC) transmissions have been used for power transmission worldwide in the last century. High Voltage Direct Current (HVDC) technology has specific characteristics which make it unique for transmission system applications, such as long-distance transmission and submarine cable crossings. Studying all types of faults is necessary to protect the design and keep the grid healthy because the faults will significantly impact the transmission system’s operation. This work aims to study the impact of the faults at the proposed transmission line between Central and Western regions in the Kingdom of Saudi Arabia, as well as the feasibility of the project by deep research into the background of the HVDC system and fault analysis at the DC transmission system, which results in knowledge of the impact on the grid before and after the faults occur. The proposed work is modeled and simulated using PSCAD software to simulate the faults on the HVDC transmission line. The results were also analyzed and studied.