A Study On Power Net Protection Based On The Modern Communication Technology

This thesis carries out a study on a new-type of wide-area backup protection scheme of power system based on modern communication technology. A new scheme based on the principles of system error tolerance and differential protection is presented. In the newly presented scheme, the function of backup protection in wide area is realized using modern communication network, GPS time synchronism technology and the collection and computation of real time data of the power system, combined with the behavior states of master station protection.The performance of mobile AGENT in remote control of power is analyzed, and the advantages of MAS protocol in remote control of power are also analyzed. The advantages of the mobile AGENT on the real time analysis and decision ability for the serial events of the power system are used in scatter protection scheme of the power system The scheme will be evaluated using the example execution to a real power system.This thesis also provides a new wide-area protection design with the ATM communication network. The proposed new scheme is with a much shorter fault clearance time and reduced tripping influence area for its that time fault extended situation based integrated protection, without the match problem of zones protection reach and setting time existing at the conventional protection. Using AGENT with the characteristics such as high flexibly scattering dispersed distribution and high information merged around the network, it can take advantage of the resources of the whole network to realize the optimized integrated protection function. The instance execution proves the virtues of the protection scheme.