Abstract
AbstractThis paper is aimed at obtaining the optimal flow of reactive power which corresponds to minimum real power losses in integrated AC‐DC power systems including one DC link. The DC power or DC current, drawn by the link at its rectifier side is introduced as a new control variable added to the normal control variables, i.e. transformer tap‐settings, generator terminal voltages and reactive‐power outputs, and switchable reactive power sources. The constraints include the reactive power limits of the generators, limits on the load bus voltages and the operating limits of the control variables. Dual linear programming is applied to minimize an objective function for system losses. Application of the proposed method on different test AC‐DC systems confirmed that less system losses is achieved with the introduction of the DC control variable.
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