To fully take the high-frequency advantage of gallium nitride (GaN) devices, this article presents a face-up integrated power module based on printed circuit board embedding technology to tackle challenges caused by conventional discrete solutions. The proposed GaN highly integrates GaN-bare-dies-based full bridge, driving circuits, and decoupling capacitors, in which advanced bismaleimide-triazine material is used as packaging copper-filled laser microvias are for low-parasitic-inductance...

The gallium nitride high electron mobility transistors (GaN HEMTs) are a superior candidate for the new-generation power electronics systems with higher efficiency and density. However, due to unique reverse characteristics, voltage drop of GaN HEMTs is much than that diode. deadtime loss in GaN-based bridge converters will be comparable switching losses if not optimized. To optimize efficiency, this article proposes an accurate analytical model HEMTs, including circuit's parasitic...

Nanosecond output pulse and high efficiency are achieved in high-voltage pulsed power supplies (HVPPSs) by applying silicon carbide (SiC) metal-oxide-semiconductor field-effect transistors ( <sc xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">mosfet</small> s), whose switching speed loss two vital characteristic parameters. However, the existing research on characteristics of SiC s is mainly based double test circuits with inductive loads, which not...

SiC <sc xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">mosfet</small> s with antiparallel schottky barrier diodes (SBDs) without reverse recovery can significantly reduce turn- xmlns:xlink="http://www.w3.org/1999/xlink">on</small> switching loss. However, this will exacerbate the oscillation during process, making electromagnetic interference problem more serious. This article analyzes influence of power module parasitic parameters on propagation...

The operating characteristics of independent wind-solar hybrid power system are analyzed for the purpose improving energy conversion efficiency and reliability in this paper. A coordinated control method that regulates operation generation units according to state storage unit is proposed. simulation studies, which based on MATLAB/Simulink/Powersystem/ Stateflow carried out due coexistence continuous discrete feature system. results indicate can reasonably regulated flow at different weather...

Both energy flow and operation characteristics of stand-alone wind/PV hybrid power systems are analyzed to achieve its optimal reliable in this paper. The transition various modes working states is also established. A coordination control method that contains maximum tracking control, load charge discharge for battery as well with protection put forward optimize management. Simulation results indicate the proposed able switch correctly automatically between different or according weather...

Wind power prediction technology is very important for scheduling of wind farm. In order to improve the predictive accuracy power, a short-term method based on genetic algorithm optimize RBF neural network proposed this paper. Genetic used weight, centers and widths hidden layer in network. Relevant historical data train MATLAB platform. Simulation results show that has higher less calculation time than Therefore, can be employed predict power.

The operating characteristics of stand-alone PV system are analyzed in order to improve the efficiency arrays and prolong battery life this paper. transition diagram its various working states is also established. An energy management method that integrates maximum power tracking control, load fast charge with variable current discharge control for presented. Simulation results show reasonably switched according weather condition, operation status improved. Thus suggested helpful optimize operation.

Based on a configuration with low cost and high reliability, disturbance injection method is employed to achieve the maximum power point tracking (MPPT) for small wind turbine generating systems(SWTGS) in this paper. State space averaging used model whole system, its nonlinear linearization are given. The choosing principle of two crucial parameters magnitude d <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">m</sub> angular frequency omega...

The performance characteristic for off-grid wind power system is analyzed in this paper. A control strategy which employs fuzzy PID controller to achieve under different operating mode without both measuring speed and applying mechanical sensors such as velocity rotation also presented. operates at the state of maximum tracking or load according requirement below nominal speed. output limited by means folding tail vane turbine automatically employing energy-dissipation above Simulation...

Water pumping system with wind turbine can not only effectively use energy, but also solve the problem of water supply and irrigation in remote areas. In order to improve efficiency as well reliability adjust speed motor smoothly quickly under condition changes, a variable frequency vector control method for three-phase asynchronous based on quasi Z source inverter drive is proposed this paper. The network boost DC link voltage according various output power turbine. A simulation studies...

With the increasing design requirements of grid-connected microgrid, capacity configuration microgrid should not only consider cost, but also other objectives, uncertainty renewable energy and load demand. Therefore, a multi-objective function considering annual comprehensive cost grid dependence is established. The k-medoids method was used to obtain data probability typical extreme days, which added into optimization as uncertain scenes. Multi-Objective Cuckoo Search algorithm (MOCS) solve...

The micro-grid that is composed of wind and solar power has wide prospects. Micro-grid two kinds operation mode grid-connected independent operation. Unreasonable switching control will produce assault current impact smooth between modes needed to ensure the continuity load supply. strategy are studied in this thesis, a method base on fuzzy PID proposed. Simulation research done under MATLAB/Simulink. result shows suggested can make seamless

A single-phase sinusoidal inverter with high-frequency link for small wind power system is proposed to improve reliability and energy conversion efficiency in this paper. fuzzy self-tuning PID controller designed the inverter. model set up simulated MATLAB. The simulation result shows that has high steady-state accuracy dynamic characteristics use of controller. Therefore, control method suggested paper can ensures meets need system.

An independent DC micro-grid that is composed of wind power, solar power and other distributed generation units in geographical proximity discussed for cooperation control energy management this paper. A multi-agent strategy based on JADE development tools designed order to achieve micro-grid. The hybrid simulation studies, which are combined with MATLAB/Simulink/Powersystem carried out verify the correctness proposed strategy. results indicate method by means can reasonably regulated flow...

Reasonable dispatch of stand-alone microgrid with renewable energy can obtain high efficiency and reliability system. In order to avoid micro-gas turbine being switched frequently between start stop that could affect the lifetime turbine, a dynamic method feedback correction for is proposed in this paper. mean time, power supply has priority improve waste wind solar energy. An economic model achieve minimum operating cost established, constraint also considered mode. Particle swarm...

Generally, the improvement of power density is achieved by increasing switching frequency and using three dimensional (3D) integration technology. The emergence gallium nitride (GaN) devices can increase dramatically facilitate realization 3D integration. By technology, structure converter be reconfigured to realize a high space filling rate, thus improve density. However, reconfiguration also changes magnetic flux distribution has an impact on thermal performance converter. This paper takes...

The multichip power modules are widely applied in high-capacity industrial converters. And the junction temperature difference among dies is inevitable due to thermal coupling between adjacent chips. This can further result current imbalance paralleled dies. In this paper, mechanism of resulting from analyzed. a method proposed mitigate difference. Specifically, bottom copper layer direct bonding substrate (DBC) modified balance equivalent resistances each die heatsink. effectively suppress...

While the very high switching speed of gallium nitride devices can easily enable power electronics converters to operate at multi megahertz, it also brings huge challenges current measurement, which is important for evaluation performance. The conventional measurement methods either have low bandwidth or influence on layout inductance. To address these issues, this article proposes a high-bandwidth and easy-to-integrate method, with almost no loop layout. proposed method utilizes trace from...

In order to achieve the energy management of DC micro-grid, a multi-agent control method is proposed in this paper. The designed intelligent agent system has two layers. lower layer composed photovoltaic power agent, wind storage and load agent. Those agents collect data from field devices, each analyzes data, then information uploaded upper that works as center deals with all produce commands. Then commands are sent respective agents, carried out at devices correspond respectively. An...

This paper provides a comprehensive analysis of the influences parasitic inductance, capacitance, and thermal resistance on GaN power module. Large inductance will result in large turn-off voltage overshoot, more severe electromagnetic compatibility problem, loss but smaller turn-on capacitance great current bump switching loss. limits level module, reduces density electronic converter, carries risk breakdown. Zero-voltage can be used to eliminate losses, which is control method by most...

Compared with Si devices, SiC devices have faster switching speed and higher dv/dt di/dt. High through Miller capacitor high di/dt common source inductance produce more serious gate-source voltage spike. Meanwhile, limited by the technology of characteristics materials, lower gate threshold maximum negative voltage. Harsh application environment fragile make it easier for shoot-through damage. This paper analyzes mechanism spike formed nonlinear inductor during tum-on turn-off, which can...