Limits...
Multivariable time series prediction for the icing process on overhead power transmission line.

Li P, Zhao N, Zhou D, Cao M, Li J, Shi X - ScientificWorldJournal (2014)

Bottom Line: In this model, the time effects of micrometeorology parameters for the icing process have been analyzed.Relevant to the characteristic of fitfulness in line icing, the simulations were carried out during the same icing process or different process to test the model's prediction precision and robustness.According to the simulation results for the Tao-Luo-Xiong Transmission Line, this model demonstrates a good accuracy of prediction in different process, if the prediction length is less than two hours, and would be helpful for power grid departments when deciding to take action in advance to address potential icing disasters.

View Article: PubMed Central - PubMed

Affiliation: Department of Electronic Engineering, Yunnan University, Kunming 650091, China ; Department of Automation, Tsinghua University, Beijing 100084, China ; Yunnan Electric Power Research Institute, China Southern Power Grid Corp., Kunming 650217, China.

ABSTRACT
The design of monitoring and predictive alarm systems is necessary for successful overhead power transmission line icing. Given the characteristics of complexity, nonlinearity, and fitfulness in the line icing process, a model based on a multivariable time series is presented here to predict the icing load of a transmission line. In this model, the time effects of micrometeorology parameters for the icing process have been analyzed. The phase-space reconstruction theory and machine learning method were then applied to establish the prediction model, which fully utilized the history of multivariable time series data in local monitoring systems to represent the mapping relationship between icing load and micrometeorology factors. Relevant to the characteristic of fitfulness in line icing, the simulations were carried out during the same icing process or different process to test the model's prediction precision and robustness. According to the simulation results for the Tao-Luo-Xiong Transmission Line, this model demonstrates a good accuracy of prediction in different process, if the prediction length is less than two hours, and would be helpful for power grid departments when deciding to take action in advance to address potential icing disasters.

Show MeSH

Related in: MedlinePlus

Maintenance based on safety status prediction.
© Copyright Policy - open-access
Related In: Results  -  Collection


getmorefigures.php?uid=PMC4127214&req=5

fig1: Maintenance based on safety status prediction.

Mentions: As shown in Figure 1, it is obvious that decision-making based on a predictive status for maintenance is better than one based on a current status, because the predictive control has the advantage of reducing unsafe factors in advance, compared to a simple feedback control loop. Therefore, if the transmission line's icing status has been predicted and unsafe parts of it have been assessed, the departments of power grid maintenance can actively optimize a schedule to deice the lines.


Multivariable time series prediction for the icing process on overhead power transmission line.

Li P, Zhao N, Zhou D, Cao M, Li J, Shi X - ScientificWorldJournal (2014)

Maintenance based on safety status prediction.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4127214&req=5

fig1: Maintenance based on safety status prediction.
Mentions: As shown in Figure 1, it is obvious that decision-making based on a predictive status for maintenance is better than one based on a current status, because the predictive control has the advantage of reducing unsafe factors in advance, compared to a simple feedback control loop. Therefore, if the transmission line's icing status has been predicted and unsafe parts of it have been assessed, the departments of power grid maintenance can actively optimize a schedule to deice the lines.

Bottom Line: In this model, the time effects of micrometeorology parameters for the icing process have been analyzed.Relevant to the characteristic of fitfulness in line icing, the simulations were carried out during the same icing process or different process to test the model's prediction precision and robustness.According to the simulation results for the Tao-Luo-Xiong Transmission Line, this model demonstrates a good accuracy of prediction in different process, if the prediction length is less than two hours, and would be helpful for power grid departments when deciding to take action in advance to address potential icing disasters.

View Article: PubMed Central - PubMed

Affiliation: Department of Electronic Engineering, Yunnan University, Kunming 650091, China ; Department of Automation, Tsinghua University, Beijing 100084, China ; Yunnan Electric Power Research Institute, China Southern Power Grid Corp., Kunming 650217, China.

ABSTRACT
The design of monitoring and predictive alarm systems is necessary for successful overhead power transmission line icing. Given the characteristics of complexity, nonlinearity, and fitfulness in the line icing process, a model based on a multivariable time series is presented here to predict the icing load of a transmission line. In this model, the time effects of micrometeorology parameters for the icing process have been analyzed. The phase-space reconstruction theory and machine learning method were then applied to establish the prediction model, which fully utilized the history of multivariable time series data in local monitoring systems to represent the mapping relationship between icing load and micrometeorology factors. Relevant to the characteristic of fitfulness in line icing, the simulations were carried out during the same icing process or different process to test the model's prediction precision and robustness. According to the simulation results for the Tao-Luo-Xiong Transmission Line, this model demonstrates a good accuracy of prediction in different process, if the prediction length is less than two hours, and would be helpful for power grid departments when deciding to take action in advance to address potential icing disasters.

Show MeSH
Related in: MedlinePlus