Assesment of Power Quality Disturbances For Grid Integration of PV Power Plants
Power Quality problems, which have become animportant consumer issue in recent years, are defined as changes in voltage,current, or frequency in the power system. Among the factors affecting energyquality in grid-connected PV systems are island mode operation, current andvoltage harmonics, transient...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Sakarya University
2019-02-01
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| Series: | Sakarya Üniversitesi Fen Bilimleri Enstitüsü Dergisi |
| Subjects: | |
| Online Access: | https://dergipark.org.tr/tr/download/article-file/517660 |
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| Summary: | Power Quality problems, which have become animportant consumer issue in recent years, are defined as changes in voltage,current, or frequency in the power system. Among the factors affecting energyquality in grid-connected PV systems are island mode operation, current andvoltage harmonics, transients, flicker, interruption, DC offset, notches,frequency changes, voltage sag / swell, voltage imbalances in the system andpower factor. Because of the power quality problems, several transmission anddistribution losses can occur due to both the consumers and the generators.Also, the integration of PV power plants to the main grid will cause severalpower quality problems, and a reliable operation of the grid with PV powerplants is a significant issue for distributed generation. Thus, the first stepin preparing a reliable algorithm for detecting power quality events occurringin the current grid is to model a power system in which power qualityimpairments can be analyzed. In this work, the power quality disturbances thatoccur in the low-voltage grid that is fed through both the main grid and thegrid-connected PV system are modeled and investigated. Developed electric powerdistribution model includes simulation of voltage sags caused by three phasefault, transformer energization and asynchronous motor switching, voltageswells caused by three phase fault, transients due to large capacitor bankswitching, harmonics and notches caused by the load connected via the powerconverter. Examination of the power quality disturbances with simulationclearly revealed the resulting waveforms, the response of the electrical powersystem to the fault conditions. Another advantage of the realized study is thatthe developed model can be used to measure the performance of the PV connecteddistributed generation system in fault detection and classification studies. |
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| ISSN: | 2147-835X |