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This paper presents a method of mathematical technique using Joint Approximate Diagonalization of Eigen Matrices (JADE). The advantages of this method, it can predict the original analysis of source signal using limited information of the system as well as to minimize costs by reducing the number of equipment to estimate the type of load profile at certain locations. By using innovative methods based...
Energy Router has received lots of attention in a great amount of applications due to its powerful functionality and great flexibility. Capacitor charging strategy plays a key role in the operation of energy router. The focus is on the submodule applied in the hybrid multilevel energy router in this paper. The submodule is constituted of a three-level rectifier and an isolated DC-DC converter in which...
Energy Router(ER), as the key technology of Energy Internet (EI), is raising more attention in recent years, especially in distribution network. However, little work has been done for simplified models of ER, which will greatly improve the combined simulation speed of ER and distribution network. This paper proposed a simplified model based on a 10kV/40MVA multi-port Energy Router utilized in 10kV...
Linear structural equation models (SEMs) have been very successful in identifying the topology of complex graphs, such as those representing social and brain networks. In many cases however, the presence of highly correlated nodes hinders performance of the available SEM estimators that rely on the least-absolute shrinkage and selection operator (LASSO). To this end, an elastic net based SEM is put...
A fast power service restoration method for distribution network with DG is proposed in this paper. Firstly, a network simplification and multi-layer description method is presented. Secondly, on the basis of the network simplification and description, the studied restoration problem is analyzed equivalently in an equivalent calculating network and it is turned into a knapsack problem whose mathematical...
Dual active bridge (DAB) with input-series output-parallel (ISOP) structure is capable to interconnect low voltage DC micro grid with medium/high voltage DC distribution grid, named as DC solid state transformer (DCSST). This paper presents a combined decoupling control strategy for the DCSST, which aims to achieve input voltage sharing among sub-modules and enhance voltage control of the parallel...
In this paper a sixth-order low-voltage gain buck converter is introduced. In this converter a high degree of freedom in achieving the performance trade-offs, both in steady-state and dynamic, is possible due to sixth-order nature. The voltage gain of this converter is almost half of the conventional buck converter. A time-domain and state-space analysis is adopted to predict the detailed performance...
The Low Voltage Power Line Communication (LVPLC) MAC protocols are an important influence factor to the network throughput. To solve the problem that the relatively low throughput due to the asymmetric PLC channel influence, we propose an improved adaptive p persistent CSMA protocol to optimize throughput for the finite loads in LVPLC accurate artificial cobweb network. This protocol reduces collision...
The single-phase power electronic traction transformer (PETT) is a power device to realize the higher efficiency and reduction of weight in railway traction system. The single-phase cascaded H-bridge rectifiers (CHBR) are an important part of the single-phase PETT. In order to ensure its reliability, an open-circuit fault diagnosis method based on the mixed logical dynamic (MLD) model and the state...
Due to the three-phase-to-three-leg direct matrix converter (3 × 3 MC) cannot be achieved with unbalanced load, then the three-phase-to-four-leg direct matrix converter (3 × 4 MC) is introduced. A novel modulation strategy is proposed to ensure the capability of 3 × 4 MC with arbitrary loads, which is development by using fixed voltage vectors and one zero vector. Considering the harm of common-mode...
This paper presents a voltage regulated step up Marx DC-DC converter suitable for HVDC offshore wind farm applications. This configuration has the capability to generate a variable high voltage adding controllability to the standard Marx converter with a fixed gain. For voltage control, an auxiliary controlled buck-boost converter was combined with the Marx converter to regulate the output voltage...
The proposition for this study is to assess how much simulation results can differ from real measurements on the implementation of a control strategy for a grid-connected PV inverter. The system is simulated in Matlab/Simulink and experimentally evaluated on a real low-voltage distribution grid. The PV inverter is implemented using a power-hardware-in-the-loop platform running the control algorithm...
Gas network system is an important medium of gas transmission; it develops quickly and has the large scale. The pipeline is an important part of the gas network system, and its local failure may lead to the short or stop of gas supply of large-scale network system. In order to explore the fault propagation rule and its influence on the gas network system, fault models are established according to...
A new cooperative guidance law based on terminal sliding mode with strengthened condition is designed to solve multi-attacker-one-target simultaneous attack problem. The strengthened condition can guarantee state convergency and eliminate chattering. Accurate time-to-go can be kept during state moving on the sliding mode. The impact time can be given before intercepting target. Numerical simulations...
By using the characteristic that the output voltage of Cuk circuit can be step-up or step-down, Cuk AC/AC converter is applied in the field of street lighting, and an illuminance controller with continuous change of output voltage is proposed in this paper. Aiming at the problem of slow response speed of feedback control technology, this paper establishes the mathematical model based on the state-space...
A comparative analysis of the plug-in fuel cell vehicles (PFCV) is studied regarding different topologies, drive cycles and control strategies. To improve the performance of the PFCV, an optimization strategy is proposed at first by regulating the power distribution between the battery and the PEMFC system. Then, a direct multiple shooting (DMS) algorithm is used to solve this nonlinear programming...
A new step-up converter with one active switch and two diodes is proposed. Static properties are derived after a dc analysis and then components stresses and ripples are evaluated and design procedures are provided. The theoretical concepts are confirmed by simulation. Finally, a prototype is built and the experimental results confirmed the feasibility of the new topology. The new proposed converter...
Various topologies of multilevel inverters have been proposed as a potential replacement for cascaded multilevel inverters in high-voltage, high-power applications as they can be extended to any number of voltage levels without introducing much more complexity to the control system. This paper discussed in detail about the application of selective harmonic elimination pulse-width modulation (SHE-PWM)...
The main topic of this paper is the controllability of dynamic complex networks. In our current study, an index is selected for the sake of quantitatively measuring the controllability of networks. The influence of this index is mainly analyzed according to empirical researches on two classes of network structures, for instance, stochastic networks and small-world networks. With such an index, the...
The working performance of modular multilevel converters (MMC) is directly affected by the circulating current. This paper presents a circulating current suppressing technique based on internal model control (IMC) applied in conventional NLM modulation scheme and double loop upper control hierarchy. According to the instantaneous energy balance between AC and DC sides, the mathematical model of circulating...
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