Ferroresonance overvoltages mitigation in distribution systems : case studies in the PEA distribution system | |
| Author | Peerapol Jirapong |
| Call Number | AIT Thesis no. ET-01-11 |
| Subject(s) | Electric power distribution Voltage regulators |
| Note | A thesis submitted in pa1tial fulfillment of the requirements for the degree of Master of Engineering, School of Environment, Resource and Development |
| Publisher | Asian Institute of Technology |
| Abstract | Ferroresonance is a non-linear resonance phenomenon that can affect power systems. The abnormal rates of overvoltages and time duration that it causes are often dangerous for electrical equipment. Ferroresonant phenomenon and its mitigation in the Provincial Electricity Authority (PEA) distribution systems are investigated through computer simulation. Typical PEA distribution systems with different system configurations and procedure of switching operations from published field tests are used in the study. Digital simulations using PSCAD/EMTDC program have been tried with the real distribution system and results from the simulation and field tests are compared. Simulation results agree quite well with the field tests. The theoretical basis of ferroresonance is discussed and verified through simulations. The factors that affect the ferroresonance overvoltages are checked to find the method that can mitigate the overvoltages and reduce metal oxide surge arrester failures in the PEA distribution system. The main factors mainly include; energization and qeenergization phase angle, length of overhead lines, loads of transformer, multi-transformers in parallel, singlephase and multi-phase switching operation, connection of transformer primary winding, switching time duration, energy absorption capability of the arrester and its applications. Many methods have been presented and recommended for system design and operating practices intended to prevent or mitigate the ferroresonance overvoltages. However the study is based on the typical PEA distribution system. The methods to mitigate the phenomenon are limited under the system design and procedure of operation. |
| Year | 2001 |
| 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) | Surapong Chirarattananon |
| Examination Committee(s) | Singh, Sri Niwas;Weerakorn Ongsakul ; Rajapakse, Athula |
| Scholarship Donor(s) | Royal Thai Government |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2001 |