The Experts below are selected from a list of 312 Experts worldwide ranked by ideXlab platform

Hua Huanhuan - One of the best experts on this subject based on the ideXlab platform.

  • Wide area traveling wave based power grid fault Network Location method
    International Journal of Electrical Power & Energy Systems, 2014
    Co-Authors: Li Zewen, Deng Feng, Zeng Xiangjun, Yao Jian-gang, Hua Huanhuan
    Abstract:

    Abstract Traditional fault traveling wave Location schemes, which are based on the fault information of only one line, have lower sensitivity and reliability, especially when one or more traveling wave fault Location devices (TWFLD) break down, startup fails or an incorrect arrival time of the initial traveling wave is recorded, this will result in the failure of the fault Location. Based on the analysis of the propagation characteristics of the fault traveling wave in power grid, a novel power grid fault traveling wave Network Location method is proposed in this paper. Firstly, the topology of a power grid is analyzed, and the installation principle of TWFLD is presented. Secondly, when the fault occurs on one transmission line, the fault traveling waves travel from the fault point to the whole power grid, and the values of the arrival time of the initial traveling wave is recorded in the substations where the TWFLD are installed. Then the values of the arrival time are analyzed with the information fusion and the fault point is located by using the power grid fault traveling wave Network Location method. Compared to the existing fault traveling wave Location schemes those are based on the fault information of only one line, all correct time information of the whole power grid has been used to calculate the fault distance in this method. Therefore, this method can achieve reliable fault Location even when one or more TWFLD break down, startup fails or an incorrect arrival time of the initial traveling wave is recorded. The simulation results match the theoretical analysis well and show that the proposed Location method provides not only high accuracy and reliability, but also good economy. These characteristics are beneficial to further enhancement of the practicability of the traveling wave Location.

  • IAS - Power grid fault traveling wave Network Location method
    2013 IEEE Industry Applications Society Annual Meeting, 2013
    Co-Authors: Li Zewen, Hua Huanhuan, Deng Feng, Zeng Xiangjun, Yu Kun
    Abstract:

    Traditional fault traveling wave Location schemes, which are based on the fault information of only one line, have lower sensitivity and reliability, especially when one or more traveling wave fault Location devices (TWFLD) break down, startup failure or record wrong arrival time of traveling wave, this will result in the failure of the fault Location. Based on the analysis of the propagation characteristics of the fault traveling wave in power grid, a novel power grid fault traveling wave Network Location method is proposed in this paper. In this method, the recorded arrival time of the initial fault traveling waves in all substations can be used effectively by information fusion technology, and the fault point is located by the power grid fault traveling wave Network Location method. This method can achieve fault Location even when one or more TWFLD break down, startup failure or record wrong arrival time of the initial traveling wave. The simulation results match the theoretical analysis well and show that the proposed Location method provides not only high accuracy and reliability, but also good economy. These characteristics are beneficial to further enhancement of the practicability of the traveling wave Location.

Li Zewen - One of the best experts on this subject based on the ideXlab platform.

  • Wide area traveling wave based power grid fault Network Location method
    International Journal of Electrical Power & Energy Systems, 2014
    Co-Authors: Li Zewen, Deng Feng, Zeng Xiangjun, Yao Jian-gang, Hua Huanhuan
    Abstract:

    Abstract Traditional fault traveling wave Location schemes, which are based on the fault information of only one line, have lower sensitivity and reliability, especially when one or more traveling wave fault Location devices (TWFLD) break down, startup fails or an incorrect arrival time of the initial traveling wave is recorded, this will result in the failure of the fault Location. Based on the analysis of the propagation characteristics of the fault traveling wave in power grid, a novel power grid fault traveling wave Network Location method is proposed in this paper. Firstly, the topology of a power grid is analyzed, and the installation principle of TWFLD is presented. Secondly, when the fault occurs on one transmission line, the fault traveling waves travel from the fault point to the whole power grid, and the values of the arrival time of the initial traveling wave is recorded in the substations where the TWFLD are installed. Then the values of the arrival time are analyzed with the information fusion and the fault point is located by using the power grid fault traveling wave Network Location method. Compared to the existing fault traveling wave Location schemes those are based on the fault information of only one line, all correct time information of the whole power grid has been used to calculate the fault distance in this method. Therefore, this method can achieve reliable fault Location even when one or more TWFLD break down, startup fails or an incorrect arrival time of the initial traveling wave is recorded. The simulation results match the theoretical analysis well and show that the proposed Location method provides not only high accuracy and reliability, but also good economy. These characteristics are beneficial to further enhancement of the practicability of the traveling wave Location.

  • IAS - Power grid fault traveling wave Network Location method
    2013 IEEE Industry Applications Society Annual Meeting, 2013
    Co-Authors: Li Zewen, Hua Huanhuan, Deng Feng, Zeng Xiangjun, Yu Kun
    Abstract:

    Traditional fault traveling wave Location schemes, which are based on the fault information of only one line, have lower sensitivity and reliability, especially when one or more traveling wave fault Location devices (TWFLD) break down, startup failure or record wrong arrival time of traveling wave, this will result in the failure of the fault Location. Based on the analysis of the propagation characteristics of the fault traveling wave in power grid, a novel power grid fault traveling wave Network Location method is proposed in this paper. In this method, the recorded arrival time of the initial fault traveling waves in all substations can be used effectively by information fusion technology, and the fault point is located by the power grid fault traveling wave Network Location method. This method can achieve fault Location even when one or more TWFLD break down, startup failure or record wrong arrival time of the initial traveling wave. The simulation results match the theoretical analysis well and show that the proposed Location method provides not only high accuracy and reliability, but also good economy. These characteristics are beneficial to further enhancement of the practicability of the traveling wave Location.

Wang Yan - One of the best experts on this subject based on the ideXlab platform.

  • A Study of Radar Network Location Based on Data Compression
    Computer Simulation, 2009
    Co-Authors: Wang Yan
    Abstract:

    Since the Location capability near the transmitter station is weak,and there exists the problem of blind area near the base line in 2 - radar space Location system,a specific 3 - radar space Location algorithm is used to compress data redundancy in the target coordinate,which is expressed by the combination of multi - radar measurements. Through Taylor series expansion of the non - linear coordinate equations near the real coordinate,the weighted LSM method compresses and unites the redundant data to take full advantage of all the radar Location information. Simulation results accord with the theoretical analysis,which indicates that linear distribution is slightly superior to symmetrical distribution,meanwhile,the 3 - radar system is more accurate than the 2 - radar system.It can improve the Location capability near the transmitter station,and the Location blind areas of the 2 - radar space Location near the base line can also be solved.It shows that the 3 - radar data compression algorithm obviously increases the target Location accuracy,and has a certain validity and practicability.

Hernán A. Makse - One of the best experts on this subject based on the ideXlab platform.

  • Inferring personal economic status from social Network Location.
    Nature communications, 2017
    Co-Authors: Shaojun Luo, Flaviano Morone, Carlos Sarraute, Matias Travizano, Hernán A. Makse
    Abstract:

    It is commonly believed that patterns of social ties affect individuals' economic status. Here we translate this concept into an operational definition at the Network level, which allows us to infer the economic well-being of individuals through a measure of their Location and influence in the social Network. We analyse two large-scale sources: telecommunications and financial data of a whole country's population. Our results show that an individual's Location, measured as the optimal collective influence to the structural integrity of the social Network, is highly correlated with personal economic status. The observed social Network patterns of influence mimic the patterns of economic inequality. For pragmatic use and validation, we carry out a marketing campaign that shows a threefold increase in response rate by targeting individuals identified by our social Network metrics as compared to random targeting. Our strategy can also be useful in maximizing the effects of large-scale economic stimulus policies.

  • Finding Influential Spreaders from Human Activity beyond Network Location
    PloS one, 2015
    Co-Authors: Byungjoon Min, Fredrik Liljeros, Hernán A. Makse
    Abstract:

    Most centralities proposed for identifying influential spreaders on social Networks to either spread a message or to stop an epidemic require the full topological information of the Network on which spreading occurs. In practice, however, collecting all connections between agents in social Networks can be hardly achieved. As a result, such metrics could be difficult to apply to real social Networks. Consequently, a new approach for identifying influential people without the explicit Network information is demanded in order to provide an efficient immunization or spreading strategy, in a practical sense. In this study, we seek a possible way for finding influential spreaders by using the social mechanisms of how social connections are formed in real Networks. We find that a reliable immunization scheme can be achieved by asking people how they interact with each other. From these surveys we find that the probabilistic tendency to connect to a hub has the strongest predictive power for influential spreaders among tested social mechanisms. Our observation also suggests that people who connect different communities is more likely to be an influential spreader when a Network has a strong modular structure. Our finding implies that not only the effect of Network Location but also the behavior of individuals is important to design optimal immunization or spreading schemes.

Zeng Xiangjun - One of the best experts on this subject based on the ideXlab platform.

  • Wide area traveling wave based power grid fault Network Location method
    International Journal of Electrical Power & Energy Systems, 2014
    Co-Authors: Li Zewen, Deng Feng, Zeng Xiangjun, Yao Jian-gang, Hua Huanhuan
    Abstract:

    Abstract Traditional fault traveling wave Location schemes, which are based on the fault information of only one line, have lower sensitivity and reliability, especially when one or more traveling wave fault Location devices (TWFLD) break down, startup fails or an incorrect arrival time of the initial traveling wave is recorded, this will result in the failure of the fault Location. Based on the analysis of the propagation characteristics of the fault traveling wave in power grid, a novel power grid fault traveling wave Network Location method is proposed in this paper. Firstly, the topology of a power grid is analyzed, and the installation principle of TWFLD is presented. Secondly, when the fault occurs on one transmission line, the fault traveling waves travel from the fault point to the whole power grid, and the values of the arrival time of the initial traveling wave is recorded in the substations where the TWFLD are installed. Then the values of the arrival time are analyzed with the information fusion and the fault point is located by using the power grid fault traveling wave Network Location method. Compared to the existing fault traveling wave Location schemes those are based on the fault information of only one line, all correct time information of the whole power grid has been used to calculate the fault distance in this method. Therefore, this method can achieve reliable fault Location even when one or more TWFLD break down, startup fails or an incorrect arrival time of the initial traveling wave is recorded. The simulation results match the theoretical analysis well and show that the proposed Location method provides not only high accuracy and reliability, but also good economy. These characteristics are beneficial to further enhancement of the practicability of the traveling wave Location.

  • IAS - Power grid fault traveling wave Network Location method
    2013 IEEE Industry Applications Society Annual Meeting, 2013
    Co-Authors: Li Zewen, Hua Huanhuan, Deng Feng, Zeng Xiangjun, Yu Kun
    Abstract:

    Traditional fault traveling wave Location schemes, which are based on the fault information of only one line, have lower sensitivity and reliability, especially when one or more traveling wave fault Location devices (TWFLD) break down, startup failure or record wrong arrival time of traveling wave, this will result in the failure of the fault Location. Based on the analysis of the propagation characteristics of the fault traveling wave in power grid, a novel power grid fault traveling wave Network Location method is proposed in this paper. In this method, the recorded arrival time of the initial fault traveling waves in all substations can be used effectively by information fusion technology, and the fault point is located by the power grid fault traveling wave Network Location method. This method can achieve fault Location even when one or more TWFLD break down, startup failure or record wrong arrival time of the initial traveling wave. The simulation results match the theoretical analysis well and show that the proposed Location method provides not only high accuracy and reliability, but also good economy. These characteristics are beneficial to further enhancement of the practicability of the traveling wave Location.