Medium-voltage (MV) SiC devices have been developed recently which can be used for three-phase MV grid tie applications. Two such devices, 15 kV insulated-gate bipolar transistor (IGBT) and 10 MOSFET, opened up the possibilities of looking into different converter topologies distribution interface. These in drives, active filter applications, or as front end solid-state transformers (SSTs). The transformerless intelligent power substation (TIPS) is one application these devices. TIPS...

Due to wider band gap of silicon carbide (SiC) compared (Si), MOSFET made in SiC has considerably lower drift region resistance, which is a significant resistive component high-voltage power devices. With low on-state resistance and its inherently switching loss, MOSFETs can offer much improved efficiency compact size for the converter those using Si In this paper, we report performance new 1700-V, 50-A designed developed by Cree, Inc. Hard-switching losses with different circuit parameters...

This paper presents predictive current-mode control for a single-phase high-frequency transformer-isolated dual-active bridge dc-to-dc converter. The algorithm increases the bandwidth of current loop converter which enables tracking reference within one switching cycle. further demonstrates that application can remove transient dc offset from in isolation transformer Direct protects saturation even at conditions. has been implemented on an experimental setup and tests have performed to...

The solid-state transformer (SST) is a promising power electronics solution that provides voltage regulation, reactive compensation, dc-sourced renewable integration, and communication capabilities, in addition to the traditional step-up/step-down functionality of transformer. It gaining widespread attention for medium-voltage (MV) grid interfacing enable increases energy penetration, and, commercially, SST interest traction applications due its light weight as result medium-frequency...

Silicon carbide (SiC) MOSFET is capable of achieving better efficiency and power density converters due to its low on-state resistance lower switching losses compared silicon (Si) Insulated Gate Bipolar Transistor. Operation at higher frequency using SiC devices allows reduction in filter size hence improves the weight ratio converter. This paper presents characterization 1200-V 100-A module compares a two-level voltage source converter (2L-VSC) MOSFETs Si IGBTs. Also, various design...

A dual active bridge (DAB) is a zero-voltage switching (ZVS) high-power isolated dc-dc converter. The development of 15-kV SiC insulated-gate bipolar transistor device has enabled noncascaded medium voltage (MV) DAB It offers simple control compared to cascaded topology. However, compact-size high frequency (HF) transformer significant parasitic capacitances for such voltage. Under and dV/dT switching, the parasitics cause electromagnetic interference loss. They also pose additional...

Silicon Carbide (SiC) MOSFET is capable of achieving better efficiency, power density and reliability converters due to its low on-state resistance, high temperature operation capability lower switching losses compared silicon (Si) IGBT. Operation at higher frequency using SiC devices allows reduction in filter size hence improves the weight ratio converter. This paper presents characterization 1200 V, 100 A module compares efficiency a Two Level Voltage Source Converter (2L-VSC) MOSFETs Si...

This study presents a rugged and cost-effective scheme for start-up operation of stand-alone squirrel cage induction machine (SCIG) wind energy conversion system (WECS). A voltage source converter (VSC) directly interfaces the SCIG with an equivalent dc load network, which could also be DC link inverter. The VSC bus is supported by electrolytic capacitor proposed ensures reliable start up these rudimentary components. ramped to rated value from small initial produced remanent magnetism core....

The medium voltage (MV) high-speed drives are required for traction, wind energy, marine, aerospace, oil, and gas compressors applications. MV converter must be able to switch at higher switching frequencies (> 5 kHz) generate fundamental frequency AC input voltages the motor (≥ 500 Hz) thereby achieving high speed output 15000 rpm). This paper presents series connection of 1.7 kV SiC MOSFET devices enable simple two level drive grid connected Experimental characterization a phase leg (one...

This study presents a detailed investigation on self-excitation of squirrel-cage induction generator (SCIG) used in wind energy conversion system. Air-gap flux the SCIG is gradually built up through controlled current injection from voltage source converter (VSC), connected directly across its stator terminals. Dc VSC ramped small initial value, which rectified output terminal developed because remanent magnetism. Increase air-gap increases and power further dc bus voltage. The...

Recently, medium voltage SiC devices have been developed which can be used for grid tie applications at voltage. Two such - 15 kV IGBT and 10 MOSFET opened up the possibility of looking into different converter topologies distribution interface. These in drives, active filter or as front end Solid State Transformers (SST). Transformer-less Intelligent Power Substation (TIPS) is one application these devices. TIPS proposed a 3-phase SST interconnecting 13.8 with 480 V utility grid. The Front...

Torque-speed characteristics of an oscillating wave energy converter (WEC) is necessary to determine its optimal power point and extract the corresponding design parameters for generator converters used generate from WEC. In this paper, analytical expressions mechanical torque on WEC due surge seawater are derived, dynamic model developed. A method hardware emulation proposed by controlling electric motor. The reference motor derived solving dynamics system in a real-time computing device...

In this work, a hybrid energy storage system (HESS) comprising of ultra-capacitor and battery is proposed for smoothing oscillating power from wave conversion (WECS). Using generated data an installed converter (WEC), each component the HESS sized to optimize cost storage. A control scheme designed regulate into deliver smoothed average grid. Energy minimizes grid side (GSC) rating also improves stability by not injecting power. The verified through MATLAB simulation using field with maximum...

Silicon Carbide (SiC) has wider band gap compared to (Si) and hence MOSFET made in SiC considerably lower drift region resistance, which is a significant resistive component high-voltage power devices. Due low on-state resistance combined with its inherently switching loss, an excellent candidate for high converter design. With loss operation capability at higher frequency, converters based on MOSFETs can offer much improved efficiency compact size those using Si IGBTs. In this paper, we...

The Dual Active Bridge (DABC) dc-dc converter is an integral part of the recently popular Medium-Voltage (MV) dc micro-grid application due to its high-power density. advent 15kV SiC IGBT and 10kV MOSFET, has enabled a non-cascaded MV Medium-Frequency (MF) DABC which expected have higher MTBF than cascaded H-bridge topology relatively small number switches. A composite three-level three-phase earlier proposed for MV-MF application, dual secondary side bridges meet rated load conditions....

In this paper, a novel technique is proposed to extend the region of zero voltage switching (ZVS) dual active bridge (DAB) dc-dc converter using an auxiliary series injection transformer. The by transformer helps us maintain ZVS controlling reactive power flow through main DAB. A model for compensation developed compute phase angle obtain optimum efficiency over entire operation. validated simulations and corresponding loss reduction presented. system implemented on high-voltage hardware...

This paper presents an ocean energy power take-off system using paddle like wave converter (WEC), magnetic gear and efficient architecture. As the WEC oscillates at a low speed of about 5-25 rpm, direct drive generator is not design. To increase cost effective flux focusing proposed. Power architecture discussed integration storage in to smooth output elaborated. Super-capacitor chosen as for its better oscillatory absorbing capability than battery. emulated hardware motor set-up demonstrated.

This paper presents a novel approach to control power flow inside high frequency transformer based multiport DC-DC converter. A converter can interface number of sources and sinks with among them. In renewable energy (RES) integration scheme, the operates like an accumulator where it collects from each RES dispatches load port. Typically, between any two ports happens through leakage inductance by imposing required phase shift fundamental component square wave voltages, impressed at ports....

The advent of the 15kV SiC IGBT device has made a single series stage medium-voltage (MV) and high-frequency (HF) DC-DC Dual Active Bridge (DAB) converter application viable. Y: Y/Δ three-phase DAB is high-power isolated based on three-level neutral-point clamped (NPC) MV side. A MV/HF transformer used in DAB, significant parasitic capacitances, which cause ringing current under high dV/dT switching. In addition, converters need sufficient dead-time between complimentary switches to avoid...

In this study, design considerations of gate driver for silicon carbide (SiC) power devices is discussed. The work focused in minimizing the common-mode current injection into control circuit, thereby adapting circuit to operate at higher dv/dt fast switching transients. By reducing interference with signal integrity can be increased, spurious faults converter minimized and reliability operation enhanced. effect coupling capacitance isolation transformer taken account. shoot-through...

This paper presents operation and control of a Squirrel Cage Induction Generator (SCIG) to generate power from an oscillating point absorber based wave energy conversion (WEC) system. The buoy is assumed be connected with the SCIG through rack pinion gear arrangement, thus converting linear motion rotary generator. Proper ratio amplify low speed standard rpm An equivalent mechanical model presented. controlled indirect field oriented (IFOC) method extract buoy. It that operated below its...

This paper presents emulation of dynamic behavior a wave energy converter in test bed condition. To evaluate performance the electrical generator and associated power electronic conversion (WEC) system, it is important to have WEC device driving generator. However, bed, actual can not be installed. Rather, convenient an motor working as device, tested. Therefore, needs emulate closely system conditions. In this paper, point absorber buoy modeling presented methods are described. The model...

This article presents power conversion and control of a novel low-speed radial-flux magnetically-geared permanent magnet generator (MGPMG) for wave energy conversion. The designed developed by ABB Corporate Research has magnetic-gear integrated into the structure, which amplifies low speed converter (WEC) to high rotor facing stator windings. is with large number poles concentrated windings simpler cost-effective design. However, due windings, induced voltage contains significant percentage...

This paper proposes an active filter-enabled power architecture to harness oscillating from wave energy converter (WEC). The consists of a diode rectifier and dc-dc extract partially rated filter supply harmonic reactive power. proposed conversion system is cost-effective compared with conventional, fully in generating the WEC, using both squirrel-cage induction generator (SCIG) permanent magnet synchronous generator. Analytically, it shown that low switching frequency adequate absorb...