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Increased transmission capacity by forced symmetrization

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2 Author(s)
Glavitsch, H. ; Swiss Fed. Inst. of Technol., Zurich, Switzerland ; Rahmani, M.

Present planning procedures are based on single outages of three-phase circuits which do not take the actual fault pattern into account. The majority of faults are single-phase faults which is motivating the present approach to exploit the remaining conductors for power transmission. A shunt device (FACTS) is conceived which is able to generate a loading pattern at breaker locations with one or two phases open such that the network side always sees a symmetrical loading. The theoretical background is given and numerical examples illustrate the efficiency of the concept. The circuit affected by a fault may be modelled by a positive sequence impedance which can be inserted in ordinary power flow programs for security calculations

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Power Systems, IEEE Transactions on  (Volume:13 ,  Issue: 1 )