Focuses on electrical application rather than the theoretical
Large-scale water conservancy and hydropower project is such open systems: large investment、long cycle, the internal structure is complex and the systems involve many complex factors. There are the many factors who have impacts on system , and all the factors have the complex relationship between each other.The risk which the project faces is very complex, so the manager should control risk in time and analysis the reason of the risk.Many scholars have carry out much research about the project risk analysis approach, and presentrd variety of risk analysis methods. But these methods have their own inherent defects, even fuzzy synthetic discrimination which have been recognized and wide used, have ite shortcomings.Large-scale water conservancy and hydropower project is an important infrastructure, but there is not a complete evaluation model about it, and give a orbicular risk analysis method.For more information please login in…
provides the production and delivery of electrical power (electrical energy), often known as power, or electricity.
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electrical power.device or system that supplies electrical or other types of energy to an output load or group of loads.
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a field of engineering that deals with the study and application of electricity, electronics and electromagnetism
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Power transmission is the movement of energy from its place of generation to a location where it is applied to performing useful work.
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In China, small current grounding style, including neutral insulated and neutral grounded with Petersen coil, is widely used in the distribution networks of 66KV or lower levels. Single-phase-grounding fault is the most common fault in the small current grounding system. How to locate the grounding point is a technical problem long existing.According to the characteristic of the zero-sequence...
Lightning surges do harm to indoor electronic devices through low-voltage ac power lines. By analyzing how lightning affects indoor electronic devices and how to protect them effectively by surge protective devices (SPD), not only academic researches can be made but also can much economic profit be acquired.A theoretical and experimental study on the coordination of surge suppressors on indoo...
To meet the needs of consider monitoring of iron core, this thesis puts forward this design proposal of on-line monitoring system for detecting multipoint earthing fault of transformer core based on establishing corresponding iron core mode , and completes the whole design. This system integrates signal acquisition, communication, analysis, storage together, and is designed based on multilayer...
With the rapid development of our power system and the improving of transmission voltage, the reliability power system operation is becoming more and more important. The sand storm is one kind of serious natural disaster.In recent years,Along with the frequent appearance of sand dust weather in our country, the influence of sand dust on electrical discharge of outdoor insulation causes our at...
The single phase-to-grounding fault frequently occurs in neutral ungrounded system. The fault line must be found to avoid a phase-to-phase fault .In this paper, firstly, the condition on single phase-to-grounding fault occurring in neutral ungrounded system are discussed and then the main troubles in choosing fault line are pointed out. Further, the methods are proposed to compare and summariz...
Abstract: Power system over-voltage is a subject closely in correlation with equipment insulation. Over-voltage condition suffering on equipments can indirectly inflect whether insulation cooperation is reasonable. Power equipment on-line monitoring technology recently develops so rapidly, and it is a new technology that spans multi-disciplinary and is applied extensively in the power system. ...
Domestic and international the electric power net circulate data express, the breakdown of the power transmission line in the electric power net have greatly part, and the breakdown caused by thunder have the specific weight compare of the power transmission line. Particularly the power transmission lines in the mountain areas, the lines breakdown is basically caused by thunder. Therefore look...
Live-working is an efficient way to reduce the repair time when there is a power failure and improve the reliability of power supply. This paper states the principle of Live-working,on the basis of a numerical method to calculate the electric field intensity of EHV transmission line near tower ,combining the typical tower of double-circuit transmission line, part of Yifengjiayi Line, it analyz...
Operation data of Luohe transmission lines during these years shows that, operation accidents of power system happen all the time, which severely influence reliability and safety of grid, having impact on production and life of ordinary people. So it has significant meaning to research on lightning protection of Luohe combined with practice condition of Luohe transmission lines.This thesis ba...
With the development of level of industry, Automatic control of mechanical facility has replaced manual work step by step. Programmable Logic Controller (PLC) is a kind of universal industrial control apparatus which is developed rapidly and used widely in recent years, taking microprocessor as its core, integrating microcomputer technology, automation technology and communication technology....
