As is known to all, a vehicle air brake system, in which usually contains moisture. To help solve the problem, it is common to use air dryer to dry compressed air effectively and completely remove the moisture of braking system .However, the existing air dryer can't suitable for all commercial vehicles....

This paper presents a multi-agent system (MAS) based dynamic control framework for the grid-connected microgrid (MG), to realise the prescribed interactive power between the MG and the main grid, while managing the output power of distributed generators (DGs) roughly proportional to their capacities....

With the development of new energy sources such as wind power and solar power generation technology, distributed generation and micro-grid technology attract increasingly great attention. However, the renewable energy resources are intermittent in nature under the influence of meteorological fluctuations,...

Aimed at realizing remote monitoring system for leakage protection of low-voltage power grid in underground mine in Shanxi Province, intelligent leakage protection device with ZigBee are used underground, and the monitoring software based on LabVIEW is designed on PC, the data of power grid is sent to...

In order to solve the structural contradiction between heat supply and heat demand in three-north-district, this paper puts forward the solutions of increasing the capacity of heat supply: condensing-back pressure type unit plan, waste heat recovery plan with heat pump, high-back-pressure heat supply...

Borehole IP method is an important branch of the well electrical prospecting method. It is a flexible way of working, which is widely used in the resource investigation and engineering geological survey, or other fields, and achieved good results. This paper introduces the way well induced polarization...

In this paper, we used the first principles (CASTEP) method to calculate the electronic properties ferropericlase (Mg0.9375Fe0.0625O) under 0 and 80 GPA. The calculated band gaps show that ferropericlase is a metal under 0 GPA, while it is a narrow-band semiconductor at 80 GPA. The ferropericlase at...

Stable operation of the power system is inseparable from the normal operation of a variety of electrical equipment; partial discharge signal power processing system to determine the time difference is the basis of the PD source localization. Typical methods of feature points difference estimate the time...

Improving raking energy regeneration efficiency is a vital problem of electric vehicle. Particle swarm optimization is introduced for regenerative braking fore distribution fuzzy controller, using membership functions and rules of fuzzy controller as optimization object and using limit of input as constraint...

LTE 230 system developed based on 4G LTE core technology distinguishes out of several specified wireless network for its advantages of wide coverage and low cost considering with the communication requirement for power allocation application in smart grid. The system is able to offer a complete solution...

The jacking-up offshore wind turbine installation vessel will under complex ocean condition during its sailing, positioning and working, and the wave loads are needed to be calculated and analyzed as the most complex loads. This paper adopts Near Field Integral Theory which based on integral surface,...

Power industry promotes the transformations to achieve a strong and excellent strategic objective. It proposed the system construction. Building the system is not only the upgrading and transformation of power facilities, but also a comprehensive and in-depth innovation of power operation mode and business...

A contactless power transmission system work based on high-frequency electromagnetic induction, companying amount of leakage magnetic flux spread outside the coupling structure and inducing power loss in the metal shell. It is necessary to design shielding mechanism to weaken the influence of leakage...

The safe and reliable operation of power system has been severely threatened by frequent DC magnetic bias when the applied DC transmission system is operating in a single-polar ground loop mode or a bipolar asymmetric mode. Based on SQL SERVER 2012, this paper sets up an AC-grid DC network information...

Optoelectronic hybrid system is widely used in military field and civilian field. Target recognition is one of the important functions of optoelectronic hybrid system. In order to improve the system’s flexibility and intelligence, expert system is involved into optoelectronic hybrid system. This paper...

In order to make up for the wind tunnel test equipment of folding reticulated shells restrictions which lead to wind pressure data measured on the surface of structure has a low density. This passage based on the basic principle of RBF neural network, using the programming software MATLAB to predict...

As a supplement of large power grid and known as the new energy, distributed generation (DG) are developing rapidly for its convenience and environmental protection. However, after DG is connected to the distribution network, the traditional single-source radial-network will become to be a double terminal...

Many kinds of uncertain electromagnetic interference exist in printed circuit boards. The using of printed circuit board (PCB) drawing software - Latium Designer Summer 09 and electromagnetic simulation software - A soft Designer 6.0 is helpful for the simulation and analysis of electromagnetic field....

We can interpret communication system as a system which transmit and receive signals. Transmitters play an important role in this system. In order to make sure that receivers can receive the signal, we should offer enough power transmitted by transmitters. Besides, we should also guarantee the stability...

This paper introduces a kind of receiver that can receive signal which weak to UV level. First, the common mode rejection for the input differential signal is necessary, and a low noise amplifier followed by. Then we should let the signal go through a Programmable filter whose center frequency, Q are...

The rapid development of information technology is promoting people’s strong demand for perfect efficient digital communication system. Offset Quadraphase Shift Keying modulation technology is a constant-envelope digital modulation technology, which is the improved QPSK[1]. It overcomes the 180° phase...

The paper aims at piloted electro-hydraulic proportional pressure-reducing valve characteristics of uncertain parameters, immeasurable states and effect of load flow, designed an observer including load flow and it’s feedback controller ,achieve robust output-feedback control to the output pressure .Based...

In order to achieve more efficient and effective transferred power, the coupled structure of an undersea power transmission (CPT) system was carefully designed. The coupling magnetic field was analyzed by FEM simulation to reveal the transferring nature of two coupled windings. Simulation and prototype...

The brake pad of disc brake, as an actuator while wind turbine braking, plays an important role in braking system. For seeking an optimum structure of brake pad, its mechanical model during braking process of large megawatt wind turbine in actual working circumstance is established in this paper. Accordingly,...

Effects of solar panels must be taken into account by the light intensity of its output characteristics in practical application, especially solar panels placed outdoor. So the light intensity coefficient is an important parameter to be considered. In this paper we took the light intensity characteristics...

To ensure safety and stability of distribution network, the maximum allowable capacity of DG has a certain limit. The maximum allowable capacity can be defined penetration level. The paper first analyses the influence caused by DG on power flow, network loss, node voltage, power quality, current protection...

Electrical equipment is composed of the basic components of the power system, and its performance has a direct impact on the safety and reliable operation of the system, whether it is large equipment such as generators, transformers, or small equipment such as power capacitors, insulators, etc, if equipment...

Because of the limited size of a common microwave anechoic chamber, compact range testing methods have been developed to be a hot spot in recent years. But an ordinary compact range can not meet the need of millimeter wave (with high frequency, 200MHz~20GHz) test. So this article uses a millimeter compact...

The new dual-band infrared detector can be read out to design a weak signal readout circuit, the readout circuit integration time is adjustable, and has characteristics of low power consumption, low noise and high sensitivity.Using feedback enhanced direct injection readout circuit (FEDI) and high performance...

The idea of our project is derived from Hangzhou Boda Electrical Corporation Limited. The research is based on the pre-arcing time and Current Characteristic of High-voltage fuse, whose short circuit fault current can reach 9-35 times of current rating. The method adopts finite element numerical calculations...

The rapid application of electric vehicle (EV) is a trend in recent years. Meanwhile, it will have a significant impact on power system. In order to reducing the disadvantages of EV accessing to the grid and maximizing the benefits of such controllable load, the scheduling control strategy of EV is becoming...

In view of the issue that present illumination facilities in classrooms can cause the waste of electric energy, this project group tried to solve the problem by designing the automatic light control system. The group started with the study of the electricity consumption of those lamps in the classroom...

In this article, I summarized three main methods about measuring space charge discharging through the physical and chemical effects. It introduced the transformer oil discharging space charge measurement method and its distribution characteristics, and mainly presented gas chromatography detection method,...

In this paper design of LED lighting system based on AC (alternating current) bus power supply mode with low and variable frequency is proposed. Mainframe output alternating current with 250V effective value and 200Hz low frequency by conversion after APFC rectification. Extension set adopting capacitor...

Since direct fault arc current is lower than the normal current value, it cannot be discovered by over-current protection; On the other hand, the arc is so dangerous. Therefore, it's imperative to research on direct current (DC) arc. In this paper, with a large number of current data through experiments...

the situation is grim for domestic civil electrical fire and arc fault is the main cause of electrical fires. Low-voltage arc fault protection technology in China is still in infancy, and has not yet established a complete low-voltage arc fault database and the arc fault protection system is not perfect...

It is important to analyze rotor current quantitatively for doubly fed induction generator(DFIG) initiated by terminal voltage dip for planning and configuration of relay protection of wind farms and grid including wind farms. The previous studies assumpt that the instantaneous activation of crowbar...

With the maturity and popularization of the technology of power electronic transformation, the power drag, rectifier circuit is used in great quantities in the application fields such as power system, which is including diode uncontrolled rectifier circuit, voltage type PWM rectifier circuit. To stabilize...