Current source back‐to‐back converter for wind energy conversion systems

Abstract

This paper proposes a new back-to-back current source converter (BTB-CSC) suitable for mediumvoltage high power wind energy conversion systems (WECS). It employs a dual three-phase permanent magnet synchronous generator and two current source inverters with a phase-shift transformer at the grid side. The proposed BTB-CSC has the following advantages: reduced power circuit and control complexity; low switching losses (zero switching losses at the inverter side); and independent control of active and reactive power. PSCAD/EMTDC simulations are used as to assess the steady-state and dynamic behaviour of the proposed system under different operating conditions. It is shown that the proposed WECS can ride-through ac faults. Experimental results from scaled prototype of the proposed WECS are used to validate the simulations.

Transient Faults in Wind Energy Conversion Systems: Analysis, Modelling Methodologies and Remedies

“…Another robust control scheme for a dual three-phase PMSG was adopted in [88] by introducing a speed controller that commands the generator to operate at the maximum speed, but with the least amount of transients under various wind speed conditions. It was demonstrated in [89] that passivity-based linear feedback control (PBLFC) enhances the transient responses of PMSG-based WECS.…”

Design and Implementation of a SiC-Based Multifunctional Back-to-Back Three-Phase Inverter for Advanced Microgrid Operation

“…Three-phase inverters are commonly used in applications such as AC sources, uninterruptible power supplies (UPS), motor drives, MGs, wind turbine generators (WTG), and electric transportation [ 24 , 25 , 26 ]. I. Abdelsalam et al [ 27 ] proposed a new dual current source BTB converter for medium-voltage/multi-MW WTGs with a wide wind speed range and good dynamics. Pulsating torque was eliminated using diode rectifiers combined with a phase-shift transformer.…”

Wind energy conversion technologies and engineering approaches to enhancing wind power generation: A review

“…Moreover, PECs have huge impact on the overall performance of the grid-connected WECS technologies. Among these technologies, the two-level (2L) – current source converter (CSC) [ 15 , 16 ], and voltage source converter (VSC) [ 11 , 17 ] topologies in back-to-back (BTB) configurations were conventionally being employed in small- and medium-scale wind farms for the last several decades; and they were usually compatible with DFIG-based WECS technology. Here, one of the main drawbacks of DFIG-based WECS is that it does not maintain operational compatibility with power converters of increasing power and voltage capacities [ 18 ].…”