The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The scale of the network determines the need for system partition management, the network block partition estimation makes the state estimation problem of large network converse into two medium or small network. This paper proposes combination of the innovation graph approach and the current reckoning method to form a new partition identification method, which can achieve complementary advantages...
The corona discharge phenomena of electrical equipment are generated with the increasing of insulation aging, electrical equipment, surface filth or atmospheric humidity. The corona discharge will cause the waste of power energy, radio interference, audible noise, insulation aging, and these defects are great threats to the safety and stability of electrical equipment. Using appropriate method to...
The low voltage ride through capability is an important aspect of the operation safety of the wind farm. According to the situation of the lack of effective monitoring of wind turbine operation, a online tracking quantitative evaluation method of wind turbine low voltage ride through capability (LVRT) is brought forward. This method realizes the monitoring and analysis of the safety of the operation...
The Current Reckoning Method is carried out in the paper, which adopts the link branch reckoning technology based on the measuring current information to achieve data digging and realize identification of bad data in the measurements set, and can identify bad data in the node injection measurement as well. Final, carry out analysis and verifying based on the modular system, which has a certain of...
The small current grounding system has many problems: low ability of extinguishing arc grounding and personal sense of electric system, none security and protection ability to indirect grounding overvoltage, equipment internal fault grounding, the new type of fault line selection method in this paper based on active protection can effectively solve the above problems. This article first introduces...
Icing disaster about transmission line has affected the safety of power network. At present, weighing method is an important method and technology for on-line icing-monitoring system, which uses the force transducer to monitor the change of pulling force about the insulator string in order to reflect the wire icing status. However, calculation formula of ice thickness used by many companies not only...
In order to prevent transformer magnetic bias made by HVDC monopolar operation, for the time being, the devices to against DC magnetic bias are mainly installed in several stages. At first, DC current is obtained by simulation or measure value in substation. Second, the places to deploy the device to against DC bias are decided based on that if DC current beyond the standard in the spot. Then, DC...
In view of the unsatisfactory results and the low utilization rates of electric equipment application, this paper proposed a hierarchical information aggregation structure and model in data analysis and application, taking the autocorrelation analysis based on data probability distribution as the foundation. The model aimed at predicting equipment state trends and assessing equipment service lifetime,...
As the power system developing towards the extra-high-voltage (EHV), ultra-high-voltage (UHV), and large capacity direction in China, online monitoring becomes much more vital for power equipment to ensure the safe operation of power system. The computer vision-based Equipment Map State Detection technique can capture the abnormal status of power device. The busbar, as a intermediate link at all levels...
Loose stator slot wedges could result in excessive vibration of the stator coils in large generators, which would accelerate the deterioration of the groundwall insulation and even eventually lead to catastrophic failure of large generators. So it is significant to detect loose slot wedges in stator slots to ensure generatorpsilas normal operation. Up to now, the slot wedges used to be tapped by hand...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.