Nowadays actual scientific problem of renewable energy is the problem of developing control systems, that ensure the generation of stable voltage in a changing environment. This paper presents a structure and methods of synthesis of control system development, which allow to decide the indicated problem....

In this paper, we consider the problem of development of equivalent circuit of non-linear element with the current-voltage characteristic controlled either voltage or current, which can be modeled without any changes of scheme in accordance with design requirements. For solving the problem we use an...

Battery is major component of smartphone, but only selected samples are periodically examined due to numerous numbers of batteries. The Consumers are generally required the use of high energy density batteries. However, most consumers are often dissatisfied with the battery life from even the most advanced...

point bar reservoir is the key development object in the late development of Daqing Oilfield, in this paper, the numerical simulation based on the construction of the point bar is carried out on the basis of the modeling of the point bar. Through dynamic data generating simulated well history and acquiring...

We study a pure iron billet placed in an induction furnace. The magnetic reluctivity of pure iron varies strongly according to the temperature. The volumic power and total current in the billet increase linearly with temperature. But, before and near the Curie point, those parameters increase very strongly....

Tower falling down or wire breaking caused by natural disasters is a serious threat to the safe operation of power transmission lines. To improve repair efficiency and quality of overhead transmission lines in the case of disasters and incidents, this paper designed a rapidly assembled pole and tower...

Because of a large number of tower elements in transmission tower, and direction of cross section is complex, it is difficult to quickly set up a space model at the same direction with the actual transmission line tower structure. In this paper, using the method of vector orientation. Define tower element...

a pressure regulator is an essential equipment during delivering natural gas to consumers with the help of pipe lines at present, but the potential pressure energy of high-pressure natural gas is not recovered. So a gas expander is employed to replace some regulators to recovery pressure energy during...

It is important whether the theoretical control parameters of the gasoline engine, such as ignition advance angle, the fuel injection advance angle, the closing time, the injection pulse width and so on, are in accord with the actual control parameters, because they relate to the role on a new product...

Methods of calculation of thermal processes of the isolating materials are considered, in problems of nondestructive diagnostics of the main and distributive power stations. Theoretical justification of calculation of thermal processes of the multilayered isolating structure was given. On the basis of...

The direct strength calculation of a 70000 t bulk carrier was carried out based on the Guidelines for Direct Analysis of Bulk Carriers. Through building finite element model of 70000 DWT Bulk Carrier's hold section, the design Loads, boundary conditions and load cases were studied. According to the direct...

This design pays much attention on analyzing and calculating Miller capacitor in operational amplifier to optimist OP (Operational Amplifier). The design for a 8-bit high speed, low power pipeline ADC is based on standard 0.18um CMOS technology, with 3.3 power supply. The results show that the dc gain...

With the increasing capacity of PV systems in the grid, the grid-connected PV systems will have negative impacts on the grid in the case of a disturbance or a fault. In this study, a strategy of ‘DC voltage control’ is adopted. During the period of low voltage ride through (LVRT), the duty cycle of the...

A fault arc may destroy electrical equipment and threaten human life. Research on the multi-physical fields in a fault arc helps reduce this danger. This paper describes a theory for the multi-physical fields in the arc. These multi-physical fault arc fields were simulated using ANSYS Fluent. A case...

This paper mainly introduces that intelligent human-machine interaction is realized by using the TI company’s DSP chip as the control chip in the embedded system. The design which takes the OCM320240T350--1C touch screen of Jingpeng company as a specific development object uses the DSP chip to control...

The paper introduces the development status of wide-area protection (WAP) and the wide- area current differential protection (WACDP) algorithm. Digital signal processor (DSP) TMS320F28335 is used as the controller, the system model is built with MATLAB/Simulink, combined with semi physical simulation...

With the development of large-scale wind turbine, the flexible deformation produced by the tower under random wind load has an important influence on wind turbine operation life. Considering flexible supporting of the tower for wind turbine and random wind load factors, the gearbox transmission system...

Due to the high complexity and strong coupling of industrial circulating cooling water system, single and isolated technology can never fulfill the energy-saving need. Thus a system energy-saving theory named MOAR was proposed and explained with practice, including four principles: management of system...

In this paper I tried to dwell on the most crucial points, concerning the nowadays state of the Russian oil and industry in the conditions of sectoral sanctions, and the vital necessity of new approaches development and their instant application the industrial process of oil and gas production.

With the development of Chinese washing and industry, the problem of large amount of energy consumption and exceed the discharge standard of sewage cannot be ignored. The development of washing industry is not mature. It leads to energy waste and environmental destruction. Under the macro environment...

Probabilistic assessment of power system transient voltage stability is a useful complement to determinate evaluation. The linear boundary of dynamic security region of the controlling unstable equilibrium point was determined on the basis of dynamical system theory. Consequently, power system transient...

Aiming at the problems of transient voltage stability decreases, which caused by the doubly-fed wind power integrated system when grid short-circuit faults, a coordinated control strategy is proposed. This control strategy combines dynamic voltage restorer (DVR) based on the improved voltage drop detection...

Considering the characteristic of medium and long term voltage stability, the simulation algorithm of medium and long term voltage stability used quasi-steady-state assumption is studied. Based on the numerical integration methods currently used in the time-domain simulation analysis, a decoupled simulation...

In order to satisfy the validity demand of quasi-dimensional combustion model for predicting diesel engine performance, a new phase-divided spray mixing model is proposed in this work. The software MATLAB/Simulink is utilized to build the quasi-dimensional combustion model of diesel engine working process,...

For the high shell side pressure drop of the traditional segmental baffled heat exchanger, a novel sextant fan baffled heat exchanger was put forward in this paper. The 3-dimensional physical model of the novel sextant fan baffled heat exchanger was built, CFD software was used to obtain detailed shell...

Energy issues are what Hu Jintao highly values, that’s why he develops his energy thoughts to be more systematic and comprehensive. To study Hu’s energy thoughts leaves a practical significance on the progress of energy generation as well as consumption revolution.

Very short-term forecasting of wind power is important to scheduling staff’s planning and wind turbine control. This paper has established a combined forecasting model based on Markov chain and support vector machine (SVM). Firstly, the SVM is used to model for wind power. Then, transition probability...

TBuilding envelope has an insulating effect. This paper takes the building envelope in Taiyuan South Passenger Depot as an object of study, and this object is a double-skin facade. By collecting data on the surface temperature and air interlayer temperature of the inner and outer skin components based...

As a kind of environmental, economical and high efficient energy, natural gas has become the first choice for the development and utilization of many countries. In this paper, we analyze the production, consumption, import and export of China’s natural gas in recent decades, research the problems of...

A maintenance schedule evaluation method for transmission and transformation equipment considering operation risk of power system is presented. The Sequential Monte Carlo simulation is used to solve probability problems. Considering the effects of equipment maintenance, a liner programming model is made...

A maintenance schedule evaluation method for transmission and transformation equipment considering operation risk of power system is presented. A dimensionality reduction method is used to deal with large amount of constraints. The maintenance schedules are quantitatively evaluated in the aspect of economic,...

According to the characteristics of the short-term load forecasting, this paper established a integrated sample system. Through the analysis of various factors and load data to evaluate the effects of various factors on load forecasting, choosing the most appropriate forecast samples. PSO-LSSVM-Cloud...

New energy vehicle, as the national strategic emerging industry, has received strong support from the government in recent years, but the industrialization development of new energy vehicle is not ideal. On the one hand, most of the research on new energy vehicle attributes is qualitative, which hindered...

With the deterioration of air pollution, global warming, people pay more attention to electric vehicles(EV). For the relationship between the diffusion of EVs and establishment of refueling stations, it is inter-constraining, and inter-stimulating. Based on agent-based model, we compare the effects of...

Taking good advantage of the diesel-exhaust with the Organic Rankine Cycle (ORC) System contributes to raising the thermal efficiency, saving fuel consumption and reducing the cost, since there is much energy carried by the diesel-exhaust. There come some problems on the match for the temperature of...

The exhaust gas of marine diesel engine loses a lot of energy when the exhaust discharged directly. Making good use of diesel engine exhaust gas to generate electricity is helpful to improve the thermal efficiency. Supercritical carbon dioxide cycle is not only with high cycle efficiency, but its devices...

Considering the business features and practical requirements of the optimal reactive power planning, this paper presents an optimal reactive power planning software system for the urban network. With multi-level architecture, the software is divided into several layers, which are managed as plug-ins....

Watered-cut zone logging technology is able to quantitatively obtain the remaining oil saturation and water cut of the underground reservoirs, to accurately judge the waterflooded grades of them, which is an important way and method to understand the distribution of residual hydrocarbon. The study shows...

Economic growth cannot be separated from the energy which is an important material basis for economic development. Since the 20th century, with global population growth and economic expansion of the scale, Economic development has led to large amounts of energy consumption, increasingly acute contradictions...