the emergence of high penetration of sustainable energy in the power system has increased the demand for faster-ramping units participating in the frequency regulation service. To fulfill the automatic generation control (AGC) and compensate the influence of sustainable energy fluctuations simultaneously,...

Compared to onshore wind power, offshore wind power has a relatively short history. The offshore wind potential in China is about 3 times larger than onshore, yet China had not dedicated into offshore wind research and development until recent years. China has the incentive to construct offshore wind...

Wind speed forecasting has significant influence on wind energy development. In the paper, a least square support vector machine with a novel optimization algorithm was used to improve the performances of wind speed forecasting model. Coupled simulated annealing (CSA) and simplex algorithm were combined...

Thermoelectric effect or Seebeck effect provides a means by which thermal energy can be converted into electricity directly. Voltage appears between two different types of materials (Conductor or Semiconductor) that are joined together and its junction is heated. While most efficient materials are semiconductors,...

This article, based on linearized equation of movement, considers an aerodynamical stability of bundled phase of overhead lines, covered with ice in wind flow. The Hurwitz criterion is used for determining critical speed of wind flow, when appears loss of stability of bundled phase. It is analyzed relationship...

Integration of solar PV and wind in to the distribution network is one of the most promising challenges of the modern power system networks to meet the growing demand of energy. Analysis of the effects of solar and wind intermittencies in the network are vital to maintain the power quality. Keeping this...

Faced with the drawback of conventional doubly-fed wind farm models, which cannot reliably reflect the actual control law and dynamic characteristics, a method of complex characteristics modeling based on simulation is developed in this paper. The software MATLAB/Simulink platform is utilized to create...

With the development of marine economy in China in recent years, The industrial zone of Dalian Changxing island has been upgraded to a national economic and technological development zone in 2010, not only take on a new mission and task, but also the tidal field characteristics study of Changxing island...

The renewable energy generators have the feature that varies as weather changes. The fluctuation of the power output will break the balance of supply and demand among the electric power grid, bringing risk to the whole power system. In March 20, 2015, total solar eclipse caused a sudden drop and then...

By dynamic simulating bench for coal transit spot in fossil power plants, dust emission was studied and characterized with different levels of belt velocity in this article. There is a very strong negative correlation between upper concentration and lower concentration of coal dust with different belt...

In order to increase the efficiency in municipal solid waste management (MSWM), waste-to-energy (WtE) technologies are provided as a solution towards the successful policy in Thailand. WtE is perceived as a means to dispose MSW, produce energy, recover materials, and free up scarce land that would otherwise...

Based on the construction of intelligent electrical pilot in the state grid corporation of China, fully grasp the requirements of intelligent power demand management, intelligent network based on the research of smart grid-oriented Advanced Metering Infrastructure (AMI), we design and realize the family...

Two 240 t/h circulating fluidized bed (CFB) boilers are choosed as the research object, through test CFB boiler parts surface temperature, surface conditions and the parts surface area, according to the standard ASME boiler body heat loss. The results showed that special separator inlet section of CFB...

In this article, preliminary investigation on the use of hydroxy sodalite (HS) as a solid catalyst for the transesterification of waste cooking oil (WCO) to biodiesel is presented. Hydroxy sodalite was synthesized in our laboratory via the conventional hydrothermal synthesis technique and the crystals...

This paper applies the Latent Class (LC) approach to investigate households’ preferences on air quality and study environmental externalities in China’s coal-based power sector. We conduct a choice experiment where people are asked to choose among three hypothetical air quality improvement options and...

LPG pressure regulator is a device which is used to change the phase of LPG from liquid to gas by decreasing the pressure. During the phase change, it is necessary to supply the latent heat of LPG to prevent excessive low temperature. Engine coolant is circulated in the pressure regulator for this purpose....

In this paper, a mathematical modeling is set up based on the trigger equipment of light electric vehicle speed control system, and the unit step response curve of dual closed-loop speed control system is given by using the simulation software simulink. A conclusion can be drew that the unit step response...

The porcelainous PTC heater is used in electric locomotive cab to improve thermal comfort. In this paper, experiments were taken to test the heat transfer performance of the porcelainous PTC heater in the aspects of heat propagation distance and the interference between air inlets and outlets. The structure...

In power grid which contains a variety of power recourses (wind, solar and thermal power), the gas-steam combined cycle unit need to undertake the main peak load regulation task so that they have to work at the low load or variable load for a long time, and the operation method will have a significant...

Microgrid (MG) power system plays an important role to fulfill reliable and secure energy supply to critical loads of communities as well as for communities in remote area. Distributed Generation (DG) sources integrated in a MG provides numerous benefits, at the same time leads to power quality issues...

The anti-galloping method was proposed for the 6×1520 mm2 large cross section conductor. The galloping model was established by using nonlinear finite element method and considering geometric nonlinear, aerodynamic nonlinear and initial deformation. The galloping characteristics and the critical conditions...

Combining with the existing transmission technology which is feasible in engineering and theory, four types of ultra-long-distance transmission mode, in terms of UHV AC, UHV DC (±800 kV and ±1 000 kV) and Half-wavelength AC transmission system (HWACT), have been introduced. The reliability and the economy...

Output power of Photovoltaic generation system is influenced by temperature, humidity, solar radiation intensity and so on. The effects of three kinds of external climate conditions, including temperature, humidity, solar radiation intensity, on photovoltaic output power were anal sized in detail in...

In order to reduce the safety loophole for substation caused by rainwater leakage of roof, this paper proposed an on-line monitoring for rainwater leakage of substation roof based on a parallel plate capacitor sensor. This method is based on the capacitance sensor in the composition of installed metal...

The cyclic variations in spark ignition engines occurring especially under specific engine operating conditions make the maximum pressure variable for successive in-cylinder pressure cycles. Minimization of cyclic variations has a great importance in effectively operating near to lean limit, or at low...

Based on conventional incremental conductance (Inc-Cond) method, a fuzzy controlled incremental conductance controller is proposed for Z-source PV inverter to realize its maximum power point tracking (MPPT). The principle of Z-source PV inverter is illustrated. Then an improvement of SVPWM for Z-source...

A method for simulating welding defect of slags or incomplete fusion is raised in this research. Experiments on seven full-size members were conducted.The research shows that the length of the welding defect is related to the decrease of the ultimate bearing capacity of the members under the static axial...

The proposed of PA (product architecture) makes the product development varied and effective. However, in the current society, focusing on the product to develop new products isn’t satisfying the user’s needs that become abundant and uneasy to be found. PA provides a systematic research framework that...

In the present study, the special interface element has been derived. And that develop three-dimensional nonlinear finite element model depicting the global behavior for RC structure strengthened by steel plates up to failure. The interface element captures not only the shear and normal stress concentration,...

The investment for distribution network construction is an important part of power grid construction. The establishment of analysis model for the investment and operational efficiency of distribution network construction is able to ensure the economic operation and reliability of power system, and has...

Linguistic variables usually take the form of a base term modified by a hedge in qualitative evaluations of multi criteria decision making problems. In this paper, the linguistic fuzzy rough set is presented to objectively model non-inclusive hedges, such as more or less and roughly, with semantics....

Advanced composite materials have gained popularity in aircraft industry. The widespread application leads to the requirement of high efficient and reliable maintenance technology for composite components. Bonded composite repairs are preferred as they provide enhanced stress transfer mechanisms, joint...

Arid and semi-arid regions face major challenges in the management of scarce freshwater resources under economic development and climate change. Groundwater is commonly the most important water resource in these areas. Accurate prediction of groundwater level is an essential component of suitable water...

In view of the characteristics of the mountain Irrigation District in Guizhou, we combine the characteristics of crop growth and the demand of environmental factors, and the application of the information management system of water resources in Guizhou mountainous areas is carried out. Through monitoring,...

Rainwater catchment irrigation and municipal water supply are the current solutions for parkland water demand in townships of Loess Plateau. Rainwater catchment however, may lead to runoff imbalance or groundwater reduction, while the municipal water supply has priority for residential consumption and...

Aimed to recovery tritium from tritiated water, ZrMnFe micro powder synthesized by solvent combustion and calcium reduction was selected to decompose water vapor. The kinetics of reaction between ZrMnFe micro powder and water vapor was studied by isothermal thermogravimetric method in the temperature...

In this study, removal of chemical oxygen demand (COD) and total phenols (TP) from pistachio processing industry wastewater was investigated using electrocoagulation method. COD and TP removal ef ciencies were compared considering wastewater initial pH by using stainless steel cathodes and aluminum anodes....

This paper adopted the model of the particles to predict oil film dynamic drift process. The prediction was supposed to happen in the channel of Changxing Island, and it carried through under four kinds of circumstances. The circumstances are no wind condition, NNE, WSW and SSW. Through simulating the...

The present paper aims at monitoring the behavior of the high density polyethylene pipe when pressed by an external force in order to shut it off so that the natural gas can no longer pass through the distribution pipelines. The behavior of the polyethylene pipe will be observed by means of fast shutter...

Aggressiveness of KCl in high temperature was studied in this article. Electrochemical experiments in hot molten KCl and corrosion experiments in high temperature were conducted for analysis of possible reaction. Comprehensive analysis indicated that aggressiveness mechanisms of KCl in high temperature...

the results of scaled acoustic laboratory experiments with noise barriers are reported. Short impulsive spherical sound wave with broad frequency spectrum is used as controllable sound source. Using spectral analysis the insertion loss spectral functions were calculated for experiments with different...

The conventional method of gold refining process is widely used and it seems no further effort has been taken to improvise the system. Safety, productivity and reliability issue remains to be crucial barrier to local jewelers to refine their in-house gold scrap. The findings have brought the researcher...

Based on the analysis of tectonic faults in Sangzhi area, black shales fracture characteristics and controlling factors of the Longmaxi formation of Lower Silurian are studied. That fracture distribution of the study area is mainly controlled by fault, where the NE-trending fault system plays the most...

Semi Volatile Organic Compounds (SVOCs) contamination in soil was a widespread problem in China due to industrial pollutants leak and discharge. A pilot study of SVE and related combination techniques was demonstrated for soil contaminated with SVOCs. A miniaturization SVE system was applied in research...

Based on geographic information systems and remote sensing technology, this article used BP neural network method and choose slope, aspect, intensity, faults, water, elevation, DEM, hardness 8 earthquake landslide factors as influencing factors in the study area (E103° ~ E105°, N30.8° ~ N32°) to identify...

This paper start to mine the four root causes of vandalism generating in landscape environment from four angles including the designers, constructor, users and environment; and then through analyzing and sorting, collate the specific form of vandalism grouped into five areas; at last, based on the five...

The production of fused slag generated is continuously increasing and is expected to reach 50,000 tons per year as coal gasification facilities and waste treatment systems producing fused slag have been actively adopted recently in Korea. One of the prospective solutions is to make geopolymers with the...

Two typical civilian dwellings, the earth dwelling and the brick and concrete dwelling, in northwestern areas of China were investigated, on-site measurement on winter outdoor meteorological parameters, indoor air temperature and relative humidity were conducted. The paper analyzed space arrangement,...