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A novel space vector PWM (SVPWM) strategy is proposed in this paper to balance the neutral-point voltage (NP) and the floating capacitor voltage for five-level active neutral-point-clamped (ANPC) converter. There are two different switching sequences in each small area. According to the NP offset, different switching sequences are used to control the NP voltage. Since the charge-discharge of the floating...
This paper proposes an improved energy management strategy for simultaneous power management of the photovoltaic grid-connected system with energy storage. Based on the DC bus voltage and the working states of grid, the PV system is divided into six working modes by the proposed energy management strategy. This can avoid the effect of grid failure on PV system, and achieve the optimal utilization...
Distributed control scheme is preferred in the application of the multiple modules based system due to its simple structure, low maintenance and high scalability. This paper proposed a hybrid communication topology and protocol to realize the distributed control applied in the cascade H-bridge (CHB) multilevel static synchronous compensator (STATCOM) with master and slave controllers. In the same...
Application of single-cycle control of the inverter can enhance the inverter DC input immunity. Controling auxiliary voltage and current outer loop in a single cycle, the load capacity of a single-cycle control can be improved. In this paper, for single-phase voltage-type high frequency link matrix inverter, we study a new multi-loop SPWM control strategy based on single-cycle inner control. Simulation...
Resistance uniformities of Au/TiO2/Au memristors with oxide layer of 20-nm-thick, 30-nm-thick and 40-nm-thick have been study respectively. For each device, uniformity of high resistances is much higher than that of low resistances in cycles, no matter how thickness the oxide layer is. It indicates that conductive filaments based on oxygen vacancies are the dominated effect on resistive switching...
This paper presents a method of designing robust H∞ reliable controllers for a class of Lipschitz nonlinear delay switched systems. External disturbances and parameter uncertainties in the systems are assumed that they are unknown time-varying and norm-bounded. When faults exist on actuators, robust H∞ reliable controllers are proposed by using Lyapunov stability theory and dwell time approach so...
Wireless power transfer (WPT) based on magnetic resonant coupling is a novel technology by which non-radiative and mid-range power transfer can be realized via the near field. WPT inevitably leads to a small-scale regional network with a certain amount of transmitters, receivers and repeaters. There is a great lack of related analysis approaches because of its high-frequency and near-field features,...
As the requirements of nuclear power plants, electric actuator valve based on SRM can meet the poor working environment of nuclear power plants. However, low failure rate and fault tolerance decided the performance of valve electric actuator system based on SRM. This paper analyzes the fault characteristics of valve electric actuator system based on SRM. to realize fault operation when system is fault...
With the rapid development of power industry, power load is also rising, leading to increased levels of short-circuit current, so the demand of the technology of short-circuit current limit is very urgent. Resonant-type fault current limiter used in extra high voltage(EHV) power grid makes high-power electronic devices with a slow response, limited withstand short-circuit current limited ability and...
Elevator is served as a kind of convenient equipment, which has wide application in people's daily life. In order to satisfy with the quick development of elevator, the contol system consisted of MCS-51 single chip is adopted in this paper. Moreover, which is used to form the special control system and relevant procedures are solidified. Then, not only the cost is reduced, but also the privacy is...
With the explosion increasing data in Internet, high performance scalable router has become a hot spot research area both in academe and industry recently. The underlying topology is a very important fold for scalable router. In this paper, we propose a new underlying topology of the scalable router, and name it Compressed 3D-Torus (C3D-Torus). It's more like the 3D-Torus, which is a famous architecture...
World market energy consumption is projected to increase by 57% from 2004 to 2030. Worldwide efforts to meet these challenges include developing alternative energy sources, exploring renewable energy resources, and reducing energy consumption. In this paper, the authors presented a new design method for energy-saving product by means of two simple case studies, hair dryer and coffeemaker. The results...
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