Application of Distributed Series Reactors in voltage balancing

Voltage unbalance is one of the main concerns in power quality studies. In the work here three-phase transmission system analysis is used to simulate voltage unbalance. Distributed Series Reactors (DSRs) are employed to improve voltage unbalance due to asymmetry in line parameters, unbalanced loading, and other causes, such as transmission line sending end voltage unbalances. The main advantage of the proposed approach is its dynamic flexibility to respond to many simultaneous sources of unbalance. Several cases are investigated covering various sources of unbalance. Moreover, different load types are analyzed and it is observed that load voltage dependency is an important factor in the number of DSRs required to correct voltage unbalances. Simulation results demonstrate that DSRs are very effective in improving voltage unbalance due to many sources.

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