In this paper, an embedded half-bridge Z-source inverter based on gamma structure is proposed. contrast with the classical inverter, proposed can generate zero voltage levels in output. High gain and low stress capacitors are main advantages of converter. The value boost factor increased by changing both shoot-through (ST) duty cycle turns ratio transformer. operating principle converter four m...

This paper proposes a method for extending the ability of rotary power flow controller (RPFC) using tap-changer of the RPFC’s transformers. A detailed model of the device is presented to analyze the effects of the tap changer operation on the performance of the RPFC. To evaluate the results, the RPFC model is simulated using PSCAD/EMTDC software. Dynamic operation of the RPFC on a 400 kV transm...

<span lang="EN-US">Large-scale grid-tied photovoltaic (PV) station are increasing rapidly. However, this large penetration of PV system creates frequency fluctuation in the grid due to intermittency solar irradiance. Therefore, paper, a robust droop control mechanism battery energy storage (BESS) is developed order damp multi-machine variable active power injected from panel. The proposed...

This paper deals with harmonics compensation in industrial and distribution networks using an active filter (AcF). When defining the AcF’s reference current, it is important to properly consider network background harmonic distortion. Within this paper, we propose AcF current calculation method, based on customers’ emissions. The main novelty of method that considers only customer’s contributio...

Compared with traditional DC power flow analysis; multi-voltage level grid analysis is more complex due to its diverse operation methods. This article proposes the calculation method in considering control modes. To take into account mode of different AC/DC and DC/DC converter stations, basic characteristic studied at first. After obtaining transformers’ influence analysis, then partitioned sub...

Exponentially decaying direct current (EDDC) components in the faulted of a power system can result an imprecise estimation fundamental frequency component. Because sources such as transmission line, transformer (CT), and relay's internal CT, signals tend to include multiple EDDC components. This paper presents accurate model current, including new term that belongs CT along with line response....