Abstract
DC Power Flow method is widely used for active power flow analysis in deregulated power system. DC Power Flow model is a constant matrix, non-iterative model which is built into DC Optimal Power Flow model for market clearing and settlement of real power market. As of now, there are few papers available in DC Power Flow model for reactive power flow analysis .Hence, this paper introduces a pure Q market and proposes a new DC Q flow model (DCQF) which can be built into a DC Optimal Q flow model for market clearing and settlement of pure Q market. In addition to the DCQF method, to obtain accurate result satisfying a specified mismatch tolerance, an Iterative QF method is also proposed whose results match exactly with the solution obtained using FDPF method. The DCQF method and Iterative QF method are tested on Ward and Hale 6-Bus System, IEEE-30 Bus System and Indian Utility 119-Bus System. The bus voltage magnitude computed using the proposed DCQF method is compared with the accurate solution obtained using Iterative QF method (proposed)/Fast Decoupled Power Flow method for a mismatch tolerance of 0.1MVAr. The maximum error value obtained is acceptable even for security analysis. The proposed DCQF and Iterative QF method are faster when compared to FDPF method.
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