| Abstrakt: |
Single-phase lines are typically used to distribute electricity economically to remote or rural locations. This system can handle three-phase loads in addition to single-phase loads. However, these distribution lines are vulnerable to issues with declining power quality on both the single-phase source and the three-phase load due to their length and inherent environmental faults. The goal of the project is to use the Sugeno Fuzzy Inference System (FIS) method to enhance the power quality performance of a single-phase-to-three-phase (1Ph-3Ph) unified power quality conditioner (UPQC) supplied by a photovoltaic (PV) array. The 1Ph-3Ph-UPQC-PV system is powered by a PV array that is connected to the system without needing a DC-link capacitor circuit. To maintain a steady voltage connected to the DC-link 1Ph-3Ph-UPQC series and provide active power to the load during disturbances, the PV array serves as a replacement for the DC-link capacitor. When figuring out the ideal parameters for proportional and integral (PI) constants, the Sugeno-FIS approach is utilized to get beyond the drawbacks of PI. A single linear load (L) and a single non-linear load (NL) are linked to each of the three system configurations (1Ph-3Ph-UPQC-PV) with 6 interference modes. Each combination of 1Ph-3Ph-UPQC-PV, using the Sugeno FIS Method, is compared with PI, resulting in a total of 12 modes of interference. In the 1Ph-3Ph-UPQC-PV with Modes 1-6, Sugeno FIS control is capable of producing three-phase load voltage THD and single-phase source current THD, which are lower than PI control and both comply with IEEE Standard 519. Modes 1-6, using PI, are able to generate a load voltage THD in the range of 1.14% to 5.19%. Otherwise, with the Sugeno-FIS, modes 1-6 are able to reduce the load voltage THD to between 1.11% and 3.70%. Modes 1-6 are capable of producing the source current THD between 0.50% and 2.40%. Otherwise, using the Sugeno-FIS, modes 1-6 are able to reduce the source current THD between 0.08% and 1.08%. The Sugeno FIS control in the system 1Ph-3Ph-UPQC-PV is able to improve the source power factor better than the PI control in all fault modes. Modes 1-6 with PI are able to maintain a source power factor between 0.99971 and 0.99999. Otherwise, using Sugeno FIS, modes 1-6 are able to improve the source power factor between 0.9999 and 1.0. The 1Ph-3Ph-UPQC-PV system using the PI/Sugeno FIS method connected to a non-linear load containing high distortion in Modes 4-6 is able to reduce the source current THD significantly. Mode 6 using FIS Sugeno is able to reduce the load current THD on phase A to source current THD of 882.05% into 0.09%, respectively. [ABSTRACT FROM AUTHOR] |
