Study on 6, 12 and 24 pulses D-STATCOM for voltage SAG mitigation

• Main Author: Mohmad Akil, Mohamad Amirul
• Format: Thesis
• Language: English; English; English
• Published: 2020
• Subjects: TK1001-1841 Production of electric energy or power. Powerplants. Central stations
• Online Access: http://eprints.uthm.edu.my/389/1/24p%20MOHAMAD%20AMIRUL%20MOHMAD%20AKIL.pdf; http://eprints.uthm.edu.my/389/2/MOHAMAD%20AMIRUL%20MOHMAD%20AKIL%20COPYRIGHT%20DECLARATION.pdf; http://eprints.uthm.edu.my/389/3/MOHAMAD%20AMIRUL%20MOHMAD%20AKIL%20WATERMARK.pdf; http://eprints.uthm.edu.my/389/

In modern industrial nowadays, electric supply is crucial and brought major impact to economic and new technology development in the country. There are many issues and technical problems occur at distribution system. Voltage sag is one of major problems. In the distribution system, voltage sag can occur in any point at any time. This issue always brought up for discussion by Electrical power committee all around the world. There are many causes of voltage sag such as overload by consumption area, electrical faults on utility lines, switching operations, trip or short circuit and any single or three phase faults. In order to mitigate this problem, many research and power control have been used. Therefore, this project chooses the Distribution Static Compensator (DSTATCOM) for mitigating voltage sag that happens in power electrical area. Its ability to stabilize power distribution in network system and many useful characteristics is considered. DSTATCOM consists of two voltage level Voltage Source Converter (VSC), DC storage device and a coupling transformer. This project focuses on development of 6-pulses, 12-pulses and 24-pulses DSTATCOM in order to mitigate voltage sag and compared each DSTATCOM results to gain control of power distribution. In order to mitigate voltage sag, the D-STATCOM has been compared in terms of Voltage Per-Unit (Vpu) and reactive power compensations. In the end, the best design is chosen based on capability to mitigate voltage sag with most stable power distribution. It is proven that DSTATCOM able to mitigate voltage sag by injecting current so that voltage sag is back to its rated value. The voltage is restores during fault in order to improve power quality. All simulations results obtained using PSCAD/EMTDC software. By using DSTATCOM, it is able to give harmonic control and provide power quality solutions in utility and industrial applications.