A non-isolated DC/DC converter with high transfer gain is proposed in this paper. The presented converter consists of the switched inductor and three-level converters. The DC/DC power converter is three-level boost converter to convert the output voltage of the DC source into two voltage sources. The main advantages of DC/DC converter are using low voltage semiconductors and high gain voltage. ...

Voltage source converter (VSC)-based high voltage direct current (VSC-HVDC) interconnectors can realize accurate and fast control of power transmission among AC networks, and provide emergency power support for AC networks. VSC-HVDC interconnectors bring exclusive fault characteristics to AC networks, thus influencing the performance of traditional protections. Since fault characteristics are r...

High Voltage Direct Current (HVDC) systems offer distinct advantages for the integration of offshore wind farms to inland grid system. HVDC transmission system based on Voltage Source Converter (VSC) enables multi-terminal use HVDC for the integration of large-scale wind power in the North Sea. That network requires a special formulation for power flow analysis as opposed to the conventional me...

This paper proposes a multi-stage power generation system suitable for renewable energy sources, which is composed of a DC-DC power converter and a three-phase inverter. The DC-DC power converter is a boost converter to convert the output voltage of the DC source into two voltage sources. The DC-DC converter has two switches operates like a continuous conduction mode. The input current of DC-DC...

The Static Synchronous Compensator (StatCom) is one of the most useful FACTS devices, since it can synthesize the reactive power from small storing elements. When it is operated within the linear region, it is seen by the system as a synchronous voltage source. By regulation of the Statcom‟s output voltage magnitude, the reactive power Exchange between the device and the transmission system may...

This paper analyzes the power stability of hybrid dual-infeed high-voltage direct-current (HVDC) system containing a line commutated converter-based HVDC (LCC-HVDC) and voltage source (VSC-HVDC). First, concept calculation method for are introduced. Second, influence VSC-HVDC on is investigated. Third, relationship between effective short circuit ratio (ESCR) discussed under different parameter...

Abstract The grid-connected DC microgrid under the background of high penetrations renewable energy sources and inverter-interfaced devices has characteristics strong nonlinearity poor immunity, which leads to problems large-scale voltage fluctuation instability when suffers large disturbances, it seriously influences security stable operation system. Therefore, a disturbance stability criterio...

The DC grid technology of multi-power supply and multi-drop-point power reception is an effective solution for large-scale renewable energy integration into the grid. Line-commutated converter-Voltage source converter (LCC-VSC) grids are one more important developmental directions future that have occured in recent years. But multi-terminal high voltage direct current system has problems incons...

Voltage source converter based high-voltage direct current (VSC-HVDC) transmission technology has been extensively employed in power systems with a high penetration of renewable energy resources. However, connecting voltage (VSC) to an AC weak grid may cause the system become unstable. In this paper, phase-shift phase-locked loop (PS-PLL) is proposed wherein back electromotive force (BEMF) obse...