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The central government of China draw out an important policy "Pothook of City Construction Land Increase and Rural Residential Land Decrease", which has been carried out in many districts allowed by the government, to alleviate the supply-demand contradiction of landuse. This paper analyzes the method to assess rationality of the project of Pothook of City Construction Land Increase and...
Static var compensator (SVC) and thyristor controlled series compensator (TCSC) are used to improve Transient Voltage Stability of the asynchronous wind farm in this paper. The related structure model of the wind farm power system is built in Matlab / Simulink. The contributions of SVC and TCSC to Transient Voltage Stability of the asynchronous wind farm and power grid are verified by the simulation...
This paper presents a Geographic Information System (GIS) based Short-term Transportation System Management (TSM) measures for reducing traffic congestion. Short-term TSM measures such as (i) One-way Street System, (ii) Intersection Improvement (iii) Parking Management System and (iv) Restriction of Truck Movement in CBD Area are considered in this study. Many applications of GIS in Transportation...
In this paper, a new control strategy is proposed to improve the performance of a wind generator system composed of a three-phase PMSG and a Back-to-Back three-phase to single phase converter. With the use of the large inductance of the synchronous generator, the control method minimizes the generator torque ripple when the system supplies a single-phase load. The problem arises from the fact that...
Profile of the FIN-MP airfoil was used as the basic section of vertical axis wind rotor blade. Emphasis was placed on the aerodynamic performance of the wind rotors with different length? of blade chord, while the blade height, rotor diameter and blade's spiral angle are respectively uniform for the studied rotors. Three-dimensional and unsteady simulation was carried out for the flow field around...
Algorithms of the state estimation are regarded as the core part of the state estimation. Firstly, the basic concepts and mathematical models of the power system state estimation are described briefly. Then the current proposed algorithms for power system state estimation, including: least square algorithm, fast decoupled method, orthogonal transformation algorithm, state estimation algorithm based...
Optimization of the combination of power generation units is a very important problem as to improve the economic efficiency of power plant. Mind Evolutionary Computation (MEC) simulates the evolutionary process of human's mind. With convergence and variation process, MEC can get the optimum solution Compared with other optimizing method such as dynamic planning method, its arithmetic is simple- and...
There are two configuration modes of the FGD booster fan in thermal power plants. One is to install booster fan behind induced draft fan, called the separation mode; the other is to integrate the two kinds of fans, that is to cut off booster fan, but install a bigger induced draft fan which can support the pressure head for the whole system, called the integration mode. Through detailed analysis,...
Wind turbine power output is totally intermittent in the nature. For grid connected wind turbine generators, power system operators (transmission system operators) need reliable and robust wind power forecasting system. Rapid changes in the wind generation relative to the load require proper energy management system to maintain the power system stability and of course to balance the power generation,...
Ecological and environmental concerns as well as growth in demanding electrical energy have driven utilities to seek new strategies for improving performance and Smart Metering represents concepts concerning the next generation of the existing power grids, and a modern process in monitoring and controlling the grid. Through this system a huge amount of data is flooded into utilities; these data help...
The pilot-scale thermal treatment experiment of municipal solid waste incinerator fly ash was carried out by swirling melting furnace. The melting characteristics of fly ash were examined in terms of chemical composition, mineralogy, morphology, leaching behavior of heavy metals. The experimental results indicate that the fly ash mainly consists of silicates, and major crystalline phases of fly ash...
To meet the condition for reutilization of derived energy and melting ash, the plasma gasification process was adopted to use high temperature of plasma furnace to gasify wastes (e.g., paper reject, paper sludge and hydro-cleaner residues). Processing paper pulp to residue derived fuel (RDF) can enhance physical stability and improve gasification efficiency. Paper pulp derived RDF has 12% ash, 15~20%...
As the operation performances and reliability of semiconductor devices are tightly related to its junction temperature, the research on the junction temperature prediction and thermal modeling do a significant meaning to extend services lifetime and improve application reliability of the IGBT modules. The physical structure and conception, RC thermal compact network component model, test principle...
The objective of this article is to study the kinetics of charged particles in a glow discharge low pressure in DC mode, sustained by electrons and ions uniform production source. We deduced for the stationary state, the electrics characteristics distributions of the charged particles in a two-dimensional 2D plan-plan configuration. The numerical model presented in this work is based on the first...
An orthogonal experimental scheme is designed for analyzing the powertrain system based on GT-drive. What extent of engine, gear-box and final drive influence on dynamic and economic performance of vehicle is presented respectively; hence, we can get An optimal matching option is get by comparing the results under different schemes. The effectiveness of this method is proven by real experiment.
This paper proposed a new control approach for power quality compensation using Unified Power Quality Conditioner (UPQC). This approach has capability of power flow control as well as power quality compensation, too. In the UPQC control, Series Active Filter (SAF) is controlled by dqo approach for voltage sag, swell, unbalance, interruption and harmonic compensation. Also, Parallel Active Filter (PAF)...
Supercritical water-cooling reactor is one of the advanced nuclear power plants as the fourth generation reactor of internationally recognized. The plant system design is once-through cycle, feed-water flow rate are provided from pressure head by pump through the reactor core became steam, and directly into the turbine. There is not a recirculation loop in this cycle, this is the the biggest difference...
This paper presents a method of misfire diagnostic detection on the LPG vehicle. The misfire rates of the catalytic converter irreversible damage temperature in full-working-condition and the misfire rates based on the exceeding OBD system emission limit in GB I test are respectively confirmed by Class A and B misfire diagnostic calibration experiments. The misfire diagnostic method in this paper...
The lack of water resources between the various areas to promote water rights transactions, is bound to consider the water allocation issue. Implementation of water allocation, is the fundamental way to solve the water crisis is one, will help improve water use efficiency, and promote optimal allocation of water resources and sustainable development, reduce water waste of resources and water conservancy...
The reduction of particulate matter (PM) emission from Diesel engines is an important challenge due to their adverse effects on human health and environment. Therefore, Diesel particulate filters (DPF) are used to trap PM in the gas exhaust lines. DPF must be regenerated periodically by burning off the PM deposit in order to prevent high back pressure level. It is well known that Balance Point Temperature...
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