Comparison of Two Power Converter Topologies in Wind Turbine System

Abstract

The article presents comprehensive results of research on two representative topologies of converters used in the path of processing energy generated in a wind turbine and transmitted to the grid. The topology T1 uses a two-level transistor-controlled rectifier as a converter from the generator side, while the T2 topology uses DC/DC boost converter. In both topologies, a three-level back-to-back converter with a line filter L was used as a grid converter. The conclusions indicate the tendency of changes in power losses depending on the aforementioned parameters and can be used at the stage of deciding on the choice of topology, operating parameters or selection of control methods depending on the specific operating conditions of the wind turbine.

Overview of Photovoltaic and Wind Electrical Power Hybrid Systems

“…These topologies are indexed with respect to the type of aero-generator used or with respect to their converters. The most interesting publications are those that give the state of the art concerning all possible topologies [37,[54][55][56][57].…”

An Novel Six-Segment Modulation Strategy for Three-Phase Isolated PFC Converter

“…As shown in Figure 2, for each of the active vectors, there are two possible switching states according to the direction of the primary side current Ip of the transformer. According to the different switching states, the six active vectors can be expressed by (1). Using bidirectional switch S 1 (including S 11 and S 21 , the same applies below, S 12 and S 22 are merged as a simple switch S 2 ), the different switch states of S 2 , S 3 , S 4 , S 5 , and S 6 cause the circuit output to alternate between positive and negative voltages U ab , U ac , U bc , U ba , U ca , U cb and zero voltage U aa , U bb , U cc .…”

“…As shown in Figure 2, for each of the active vectors, there are two possible switching states according to the direction of the primary side current I p of the transformer. According to the different switching states, the six active vectors can be expressed by (1).…”

“…The power rectifier that converts an alternating current to direct current is called a rectifier. Acting as a rectifier between power grid and powered devices, it has been widely used in communication power supply, photovoltaic system [1] and electric vehicle [2]. However, the power rectifier may produce a large number of harmonics, reduce the system efficiency and power quality, and may even endanger the safe operation of the grid [3,4].…”

Improved Topology and Control Strategies for DC Converters in Wind Power Full DC Systems

“…Notably, recent research has focused on enhancing the efficiency and reliability of these topologies, particularly in the context of renewable energy applications. The MMC DC converter, either in isolated or non-isolated forms, has demonstrated effectiveness and reliability, offering advantages such as efficient power transmission, excellent regulation capabilities, and notable scalability [8][9][10]. Its intricate topology and control strategy enable adaptation to diverse voltage and power level conversion requirements, making it a crucial component in onshore full DC wind power systems [11][12][13][14].…”