Power injection modeling and optimal multiplier power flow algorithm for steady-state studies of unified power flow controllers |
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| Affiliation: | 1. National Institute of Technology, Uttarakhand, India;2. National Institute of Technology, Allahabad, India;1. Department of Electrical Engineering, Lorestan University, Khorramabad, Iran;2. Department of Applied Mathematics, Faculty of Mathematical Sciences, University of Tabriz, Tabriz, Iran;3. Lorestan Electrical Power Distribution Company, Khorramabad, Iran;1. Department of EEE, National College of Engineering, Tirunelveli 627151, India;2. Department of EEE, Thiagarajar College of Engineering, Madurai 625015, India |
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| Abstract: | This paper presents an optimal multiplier based Newton-Raphson power flow algorithm for reliably and efficiently handling power systems with embedded flexible AC transmission systems (FACTS) devices such as unified power flow controllers (UPFCs). A power injection transformation of a two voltage source UPFC model is derived in rectangular form. After detailed analyses of issues in implementation of UPFCs in power flow programmes by various power flow algorithms, the optimal multiplier power flow method for ill-conditioned systems is adopted. The proposed UPFC model and power flow algorithm have been programmed and vigorously tested in a number of systems. The results on the IEEE 30-bus test system and a 306-bus practical system are reported and compared with conventional user defined model type programmes, which clearly illustrate the effectiveness of the proposed algorithm. |
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