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To manage the microgrid effectively, it is important to get the power information among multiple distributed generation (DG) units. However, when the droop control method is adopted, as the corresponding DG units cannot be simply modeled as VF or PQ buses, the conventional power flow algorithm may become inapplicable. To solve this issue, a time domain iteration (TDI) based power flow algorithm is...
Wind/PV/Battery micro-grid hybrid simulation research on operational control is an important link in the development of renewable energy power generation technology. This paper establishes a model of micro power unit control system based on RTDS and a digital physical hybrid simulation model of micro power unit control system based on RTDS and controller, constructs a Wind/PV/Battery micro-grid experimental...
With the large-scale development of microgrids-(MGs), adjacent area could formulate multi-microgrids (MMGs) due to the mutual connection and supply, stimulating the problem about efficient and economic operation in multi-microgrids and becoming one of the pivotal technologies. This paper presents distributed predict optimal operation algorithm and control strategies considering the situation of grid...
This paper introduces the multiple linear regression, stepwise linear regression, neural network method, and improves the neural network. Comprehensive analysis of the current prediction methods, the application principle of a detailed analysis and comparison of the various prediction methods advantages and disadvantages. Put forward to improve short-term load forecasting accuracy is not only attach...
This paper takes a 298,000T VLCC as the research object and the whole ship finite element model is built up for numerical analysis. The aim of this paper is to calculate and analyze the bearing reaction force of a VLCC under different loading case and wave parameter. Based on the analysis of the calculation results, rules of bearing reaction forces are concluded and discussed, which can be used for...
In order to analyze the increasing accumulative plastic damage of ship stiffened plate, combing the interaction coefficient of stiffener and plate, with plastic strain of damage evolution as the control quantity, the low-cycle fatigue accumulative increasing plastic damage model and low-cycle fatigue life model for stiffened plates have been derived based on the theory of damage mechanics. The fatigue...
Hull deformation is one important contributor to the bearing offset disturbances which may relate to the accuracy of shaft alignment. Also, it directly affects the overall performance of propulsion shafting system to a large extent. Therefore, the ability to account for hull deformations in an early design stage is of utmost importance. In this article, a finite element model of a 300,000DWT VLCC...
In this paper, we present amodeling technique of using Jackson's network theorem to characterize the performance of mashup multiple servers in cloud computing environments. The key challenge in providing new mashup mobile applications in cloud computing, such as the real-time location-based services, is to evaluate the overall delay resulting from integrating multiple cloud servers. Furthermore, the...
Fatigue failure of the circuit board's research focuses on the influence to the circuit board of vibration of rigid circuit board type, distribution of Electronic Components on the board etc. And there is relatively little research to the flexible circuit board's fatigue life research. Local stress-strain method is used to predict the fatigue life. Simulate actual fatigue test load conditions to established...
The Love River with a length of 16 km along the main stream and a catchment area of 62 km2 is an urban-type tidal stream and its estuary locates at the Kaohsiung Harbor in southern Taiwan. The majority of municipal wastewater directly discharged into the Love River, resulting in deterioration of water quality, especially the low dissolved oxygen (DO) problem. The Water Quality Analysis Simulation...
Rigid-flexible printed circuit boards (RFPCB) has the advantages of providing not only the flexibility and bendability required by many electronic products, but also the reliability required by the key electronic components. In this study, based on one kind of RFPCB which would be used for a wearable device prototype, the structure optimization was performed by simulations. Through the structural...
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