The paper introduces a new method for optimizing the placement of a Dynamic Voltage Restorer-DVR for voltage sag mitigation in distribution systems. The location of DVR is optimally selected on the basis of minimizing the system average RMS variation frequency index – SARFIX of the system of interest. | SARFIX improvement for distribution system by dynamic voltage restorer considering its limited current TẠP CHÍ PHÁT TRIỂN KHOA HỌC VÀ CÔNG NGHỆ - 47 KỸ THUẬT & CÔNG NGHỆ, TẬP 1, SỐ 3, 2018 SARFIX improvement for distribution system by dynamic voltage restorer considering its limited current Bach Quoc Khanh single sensitive load while the latter is introduced Abstract—The paper introduces a new method for for systematically improving PQ in the power optimizing the placement of a Dynamic Voltage system that is mainly interested by utilities. Restorer-DVR for voltage sag mitigation in distribution systems. The location of DVR is Among CPD based solutions for voltage sag optimally selected on the basis of minimizing the mitigation, using the Dynamic Voltage Restorer system average RMS variation frequency index – SARFIX of the system of interest. The problem of (DVR) is proved to be effective for “distributed optimization is introduced where the modeling of improvement” [6, 7, 8] with regard mainly to DVR using Norton’s equivalent circuit in short- DVR’s controller design improvement for circuit calculation and voltage sag calculation using mitigating PQ issues at a specific load site. When the Thevenin’s superposition principle are combined DVR is used for “central improvement” of PQ in for determining the objective function which is the general, the problem of optimizing its placement SARFIX of the system with the presence of one DVR. The DVR’s effectiveness of system voltage sag and size always needs to be solved and [5] mitigation is considered in the case of a given overviews various researches for modeling and maximum current generated by DVR. The paper uses solving the problem. However, the number of the IEEE 33-buses distribution feeder as the test reports for “central improvement” of PQ using system for voltage sag simulation and influential CPD, especially DVR is much fewer than that for parameters to the
