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High penetration of distributed generation units in microgrids has caused severe frequency stability challenges. Coordinated secondary control can resolve this problem by judiciously dispatching active power resources using the communication infrastructure that supports the microgrid operations. In this paper, a distributed secondary control design for isolated microgrids is developed, and the effects...
High penetration of distributed interface converters (DICs) in the isolated AC micro-grid (MG) may result in poor frequency and voltage response due to low inertia of conventional DICs. In order to overcome this difficulty, the concept of the virtual synchronous generators was proposed recently. meanwhile, in order to improve the convergence rate of the conventional consensus-based droop control and...
Recent advocates of distributed multi-agent systems (MAS) have been widely adopted as promising solutions for micro-grid (MG) control and operations. In this paper, we propose an alternating direction multipliers method (ADMM) for consensus-based distributed droop control for proper real power and reactive power sharing. In comparison with the conventional first-order consensus method, this ADMM implementation...
Optimization of preparation of gypenosides liposome (GPSL) was investigated with response surface methodology (RSM) and the effect of GPSL activating phagocytosis activity and cytokine secretion of macrophages was determined in the paper. The results showed that the optimal conditions of GPSL preparation were as follows: the ratio of lipid to drug (w/w) of 8:1, the ratio of soybean phospholipid to...
MLAT (Multilateration) is a necessary technique in A-SMGCS (Advanced - Surface Movement Guidance & Control System) in the future. The precision of MLAT is related to GDOP (Geometric Dilution of Precision) and TOA (Time of Arrival) accuracy of its distributed stations. In view of the optimization among the multi-stations, an improved method based on fuzzy clustering is proposed. Different stations...
This paper studies the history of ERP and E-commerce, analysis the importance of integration and possible facing problems, and then presents the principle of integration, which is "unified strategy, process optimization, application integration and data synchronization". Finally, a complete and feasible solution is given for manufacter E-commerce and ERP integration.
The optimum design course is taught for undergraduate students as a basic discipline in engineering and technology education. Optimum primarily aims to find the best possible combination of solutions, which can be termed as design parameters to maximize or minimize an optimization problem. The development of conventional approaches of optimum has dramatically influenced modern teaching technologies...
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