Performance evaluation of phase-shifting transformer for integration of renewable energy sources
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ORIGINAL PAPER
Performance evaluation of phase-shifting transformer for integration of renewable energy sources Burcu Sakallıoglu ˘ 1 · Burak Esenboga ˘ 2
· Tugçe ˘ Demirdelen2 · Mehmet Tümay3
Received: 28 January 2020 / Accepted: 4 May 2020 © Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract In recent years, the installed power capacity of renewable power plants has been increasing because of the technological developments, industrialization and rapid population growth. This case has led to the extension of electric transmission networks. Extending transmission networks, on the other hand, means the long transmission lines and line losses. The efficient control of electricity transmission systems can be achieved through an efficient selection of devices used in transmission lines as well as the proper management of networks. These devices, called Flexible Alternating Current Transmission System (FACTS) devices, are integrated into transmission lines and provide energy efficiency in the transmission system. In this study, a novel Two-Core Asymmetric Phase-Shifting Transformer (APST) model, which is a serial FACTS device developed for the efficient use of transmission lines, will be realized. The most important factor in the selection of the Two-Core APST model is to obtain a general model that is valid for all quadrature and non-quadrature dual-core APSTs instead of Quadrature Booster type APSTs, which are frequently used in the literature. The designed Two-Core APST model will be tested in an electrical transmission system consisting of a 154 kV source voltage level and loads. Moreover, this model will be applied in IEEE 9-bus system in MATLAB program and changes in transferred power will be examined. Changes in active power transfer and voltage will be observed by the step change of the APST. Keywords Asymmetric phase-shifting transformer · IEEE 9-bus system · Quadrature booster · Renewable energy · Modeling
Abbreviations ET ARS QB Vsource Z ET aET σET IBT aBT
B
Excitation transformer Advanced–retard switch Quadrature booster Source voltage vector ET impedance vector ET ratio vector ET connection angle BT current vector BT ratio vector
Burak Esenbo˘ga [email protected]
1
EÜAS¸ Bursa Natural Gas Combined Cycle Power Plant Operation Directorate, Bursa, Turkey
2
Department of Electrical and Electronics Engineering, Adana Alparslan Türke¸s Science and Technology University, Adana, Turkey
3
Department of Electrical and Electronics Engineering, Çukurova University, Adana, Turkey
Z PST aPST,advanced ψ Ptransmission BT OLTC APST IET VET Z BT VBT VBT,secondary σBT aPST,retard Vload δ VPST,secondary
PST impedance vector PST advanced mode phase shifter angle Phase shift angle Transferred active power Booster transformer On-load tap changer Asymmetric phase shift transformer ET current vector ET output voltage vector BT impedance vector BT input voltage vector BT secondary output voltage vector BT connection angle PST retard mode phase shifter angle Load voltage vector Powe
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