Synthesis and control of custom power devices for enhancing power quality problems | |
| Author | Paisan Boonchiam |
| Call Number | AIT Diss no.ET-09-01 |
| Subject(s) | Electric power systems--Quality control Electric power systems--Equipment and supplies |
| Note | A dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Engineering in Energy, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Series Statement | Dissertation ; no. ET-09-01 |
| Abstract | Custom power device is the applications of power electronic to improve electrical quality of power distribution system for sensitive load in industrial plants. Industries reporting production stops due to voltage disturbance, such as short interruptions, voltage sag/swell, voltage/current harmonics, voltage flicker, power factor correction. These industries include paper mills, semiconductors facilities and other industries with fully automated production. The objective of study is to use the custom power device for mitigating power quality problem created by disturbances and non-linear loads. The equipment studied in the dissertation exploit the control actions that can be taken by power electronic devices, which are much faster than speed of conventional equipment and protection systems. This dissertation presents three compensating types of custom power device based on connected voltage source converter topologies. The series-connected device', popularly referred to as DVR, has been proved suitable for the task of compensating voltage sag and swell and voltage regulation in power distribution systems. DSTATCOM is, the shunt¬connected device, connected to compensate the reactive power for improving harmonics, power factor corrections, and voltage fluctuation. UPQC is the hybrid-connected device that includes the performance of DVR and DSTATCOM. The topology of voltage source converter for medium voltage grid is presented with multilevel topology. Three types of multilevel topology, namely diode-clamped, flying capacitor and series cased H-bridge have been investigated. The diode-clamped multilevel topology is chosen for custom power devices and can readily be deployed in practice when the system needed to support in short period time. The modeling and control of custom power device are proposed with the dynamic decoupling control, feedforward control and improving the control performances in discrete time domain simulation. The control and system parameters are designed based on real parameters in power distribution system. The system model, that covers national standard, is used for testing and validating all concept and methodology. Finally, the planning of high-power quality zone is discussed. The concept of a high-power quality or premium power zone is the zone that electric power inside is tightly regulated by custom power device. Moreover, the custom power devices, backed by distributed generator, will supply the most sensitive loads during the total line outages. In this dissertation, a configuration of the premium power zone is proposed and then various issues involved with the operation of the zone are discussed |
| Year | 2009 |
| Corresponding Series Added Entry | Asian Institute of Technology. Dissertation ; no. ET-09-01 |
| Type | Dissertation |
| 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) | Mithulananthan, Nadarajah ; |
| Examination Committee(s) | Weerakorn Ongsakul;Manukrid Parnichkun;De Doncker, ir. R.W. ; |
| Scholarship Donor(s) | Royal Thai Government; |
| Degree | Thesis (Ph.D.) - Asian Institute of Technology, 2009 |