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As the distributed generators are connected together through inverter interface in the microgrid, the control of the control of the interface inverter has an important influence on the operating performance of microgrid. In the paper, the study focuses on the control of the interfaced inverter, when microgrid operates in the islanded mode. In order to make the microgrid property similar to the utility...
This paper proposes an improved power sharing control scheme to achieve the accurate power sharing control and offer an improved PCC voltage regulation capability in islanding microgrid. An enhanced virtual impedance design is assumed in the conventional droop control scheme to manage distributed generation (DG) units to export the accurate reactive power in proportion to their rating. A point of...
Power sharing between inverters, microgrid modeling and stability analysis are hot research fields in microgrid research. Line impendence is an important parameter to improve accuracy of the power sharing and to improve the accuracy of the model of the microgrid system. Line impedance measure methods have been discussed in several papers. This paper summarized and analyzed each of these methods, identified...
Micro grid(MG) consists of a number of parallel operating inverters. The droop control strategy is commonly used in parallel-connected inverters. The conventional PI regulator for the voltage control has little effect on restraining the voltage harmonic content under the nonlinear load conditions. So an effective and reasonable control strategy for inverters must be adopted to ensure the output power...
This study is aimed at a microgrid composed of inverters. During autonomous operation of microgrid, every DG participates in the regulation of the voltage amplitude and frequency, while the change of the load power occurs. In this paper the virtual power droop control is adopted and virtual impedance is added to inverters. The small signal model of the microgrid system in autonomous operation is established...
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